chore(main): release 6.1.0 (#1717)

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) from 7.1.11 to 7.3.2.
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/v7.3.2/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v7.3.2/packages/vite)

---
updated-dependencies:
- dependency-name: vite
  dependency-version: 7.3.2
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.editorconfig

@@ -0,0 +1,19 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[Makefile]
+indent_style = tab
+indent_size = 4

.eslintrc.json

@@ -1,18 +0,0 @@
-{
-    "env": {
-        "commonjs": true,
-        "es6": true,
-        "node": true,
-        "jest": true
-    },
-    "extends": "eslint:recommended",
-    "globals": {
-        "Atomics": "readonly",
-        "SharedArrayBuffer": "readonly"
-    },
-    "parserOptions": {
-        "ecmaVersion": 2018
-    },
-    "rules": {
-    }
-}

.generatelicensefile.json

@@ -0,0 +1,6 @@
+{
+  "inputs": ["./package.json"],
+  "output": "./THIRD-PARTY",
+  "overwrite": true,
+  "ci": true
+}

.gitattributes

@@ -0,0 +1,7 @@
+/dist/** linguist-generated
+/package-lock.json linguist-generated
+*.json text eol=lf
+*.js text eol=lf
+*.jsx text eol=lf
+*.ts text eol=lf
+*.tsx text eol=lf

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -12,6 +12,14 @@ body:
       description: What is the problem? A clear and concise description of the bug.
     validations:
       required: true
+  - type: checkboxes
+    id: regression
+    attributes:
+      label: Regression Issue
+      description: What is a regression? If it worked in a previous version but doesn't in the latest version, it's considered a regression. In this case, please provide specific version number in the report.
+      options:
+        - label: Select this option if this issue appears to be a regression.
+          required: false
   - type: textarea
     id: expected
     attributes:

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,9 +1,11 @@
-*Issue #, if available:*
+_Issue #, if available:_
 
-*Description of changes:*
+_Description of changes:_
 
 ---
 
-* [ ] Have you followed the guidelines in our [Contributing guide?](https://github.com/aws-actions/configure-aws-credentials/blob/main/CONTRIBUTING.md)
+- [ ] Have you followed the guidelines in our
+      [Contributing guide?](https://github.com/aws-actions/configure-aws-credentials/blob/main/CONTRIBUTING.md)
 
-By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.
+By submitting this pull request, I confirm that you can use, modify, copy, and
+redistribute this contribution, under the terms of your choice.

.github/integ_tests/tinyproxy.conf

@@ -0,0 +1,6 @@
+Port 9999
+Listen 127.0.0.1
+Timeout 600
+Allow 127.0.0.1
+LogFile "/home/runner/work/configure-aws-credentials/configure-aws-credentials/integ_proxy_log.txt"
+LogLevel Connect

.github/workflows/automerge-approved-prs.yml

@@ -0,0 +1,32 @@
+on:
+  pull_request_review:
+    types: submitted
+
+jobs:
+  approved_pr:
+    name: Automerge approved PRs
+    permissions:
+      contents: write
+      pull-requests: write
+      id-token: write
+    if: ${{ github.event.review.state == 'approved' && github.repository == 'aws-actions/configure-aws-credentials' && (github.event.review.author_association == 'OWNER' || github.event.review.author_association == 'MEMBER' || github.event.review.user.login == 'aws-sdk-osds') }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v6
+        with:
+          aws-region: us-west-2
+          role-to-assume: ${{ secrets.SECRETS_AWS_PACKAGING_ROLE_TO_ASSUME }}
+          role-duration-seconds: 900
+          role-session-name: SecretsManagerFetch
+      - name: Get bot user token
+        uses: aws-actions/aws-secretsmanager-get-secrets@v2
+        with:
+          parse-json-secrets: true
+          secret-ids: |
+            ${{ secrets.OSDS_PACKAGING_ROLE }}
+      - name: Enable PR automerge
+        run: gh pr merge --auto --squash "$PR_URL"
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GITHUB_TOKEN: ${{ env.OSDS_ACCESS_TOKEN }}

.github/workflows/cawsc-test.yml

@@ -0,0 +1,20 @@
+name: Test Configure AWS Credential
+on:
+  workflow_dispatch:
+
+jobs:
+  cawsc:
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+    steps:
+      - name: CAWSC
+        uses: aws-actions/configure-aws-credentials@main
+        with:
+          aws-region: us-west-2
+          role-to-assume: ${{ secrets.SECRETS_AWS_PACKAGING_ROLE_TO_ASSUME }}
+          role-duration-seconds: 900
+          role-session-name: TestCAWSC
+      - name: Whoami
+        run: |
+          aws sts get-caller-identity

.github/workflows/check.yml

@@ -1,16 +0,0 @@
-on:
-  [pull_request]
-
-name: Check
-
-jobs:
-  check:
-    name: Run Unit Tests
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v3
-    - name: Run tests
-      run: |
-        npm ci
-        npm test

.github/workflows/close-stale-issues.yml

@@ -15,14 +15,14 @@ jobs:
     runs-on: ubuntu-latest
     name: Stale issue job
     steps:
-    - uses: aws-actions/stale-issue-cleanup@v5
+    - uses: aws-actions/stale-issue-cleanup@v6
       with:
         # Setting messages to an empty string will cause the automation to skip
         # that category
         ancient-issue-message: This issue has not received any attention in 1 year. If you want to keep this issue open, please leave a comment below and auto-close will be canceled.
         stale-issue-message: This issue has not received a response in a while. If you want to keep this issue open, please leave a comment below and auto-close will be canceled.
         stale-pr-message: This PR has not received a response in a while. If you want to keep this issue open, please leave a comment below and auto-close will be canceled.
-        
+
         # These labels are required
         stale-issue-label: closing-soon
         exempt-issue-labels: no-autoclose
@@ -48,4 +48,4 @@ jobs:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         loglevel: DEBUG
         # Set dry-run to true to not perform label or close actions.
-        dry-run: false
+        dry-run: false

.github/workflows/closed-issue-message.yml

@@ -13,6 +13,5 @@ jobs:
         # These inputs are both required
         repo-token: "${{ secrets.GITHUB_TOKEN }}"
         message: |
-          Comments on closed issues are hard for our team to see. 
+          Comments on closed issues are hard for our team to see.
           If you need more assistance, please either tag a team member or open a new issue that references this one.
-          If you wish to keep having a conversation with other community members under this issue feel free to do so.

.github/workflows/dependabot-autoapprove.yml

@@ -0,0 +1,41 @@
+name: Dependabot auto-approve
+on:
+  pull_request_target:
+  workflow_dispatch:
+
+permissions:
+  pull-requests: write
+  id-token: write
+  contents: read
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.pull_request.user.login == 'dependabot[bot]' && github.repository == 'aws-actions/configure-aws-credentials' }}
+    steps:
+      - name: Get Metadata
+        id: dependabot-metadata
+        uses: dependabot/fetch-metadata@v2
+      - uses: actions/checkout@v5
+        name: Clone repo
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v6
+        with:
+          aws-region: us-west-2
+          role-to-assume: ${{ secrets.CONFIGUREAWSCREDENTIALSPACKAGEROLEARN }}
+          role-duration-seconds: 900
+      - name: Get bot user token
+        uses: aws-actions/aws-secretsmanager-get-secrets@v2
+        with:
+          parse-json-secrets: true
+          secret-ids: |
+            ${{ secrets.OSDS_PACKAGING_ROLE }}
+      - name: Approve PR if not already approved
+        run: |
+          gh pr checkout "$PR_URL"
+          if [ "$(gh pr status --json reviewDecision - q .currentBranch.reviewDecision)" != "APPROVED" ]; then
+            gh pr review "$PR_URL" --approve
+          else echo "PR already approved"
+          fi
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GITHUB_TOKEN: ${{ env.OSDS_ACCESS_TOKEN }}

.github/workflows/handle-stale-discussions.yml

@@ -0,0 +1,18 @@
+name: HandleStaleDiscussions
+on:
+  schedule:
+    - cron: '0 */4 * * *'
+  discussion_comment:
+    types: [created]
+
+jobs:
+  handle-stale-discussions:
+    name: Handle stale discussions
+    runs-on: ubuntu-latest
+    permissions:
+      discussions: write
+    steps:
+      - name: Stale discussions action
+        uses: aws-github-ops/handle-stale-discussions@v1
+        env:
+          GITHUB_TOKEN:  ${{secrets.GITHUB_TOKEN}}

.github/workflows/issue-regression-labeler.yml

@@ -0,0 +1,32 @@
+# Apply potential regression label on issues
+name: issue-regression-label
+on:
+  issues:
+    types: [opened, edited]
+jobs:
+  add-regression-label:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+    - name: Fetch template body
+      id: check_regression
+      uses: actions/github-script@v7
+      env: 
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        TEMPLATE_BODY: ${{ github.event.issue.body }}
+      with:
+        script: |
+          const regressionPattern = /\[x\] Select this option if this issue appears to be a regression\./i;
+          const template = `${process.env.TEMPLATE_BODY}`
+          const match = regressionPattern.test(template);
+          core.setOutput('is_regression', match);
+    - name: Manage regression label
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: |
+        if [ "${{ steps.check_regression.outputs.is_regression }}" == "true" ]; then
+          gh issue edit ${{ github.event.issue.number }} --add-label "potential-regression" -R ${{ github.repository }}
+        else
+          gh issue edit ${{ github.event.issue.number }} --remove-label "potential-regression" -R ${{ github.repository }}
+        fi

.github/workflows/package-dist.yml

@@ -1,4 +1,4 @@
-name: Update dist files on 
+name: Update dist files on main branch
 
 on:
   push:
@@ -6,6 +6,7 @@ on:
       - main
     paths-ignore:
       - 'dist/**'
+  workflow_dispatch:
 
 jobs:
   package:
@@ -16,7 +17,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
           ref: ${{ github.ref_name }}
@@ -27,18 +28,18 @@ jobs:
           npm test
           npm run package
       - name: Configure AWS credentials
-        uses: aws-actions/configure-aws-credentials@v2
+        uses: aws-actions/configure-aws-credentials@v6
         with:
           aws-region: us-west-2
-          role-to-assume: ${{ secrets.SECRETS_AWS_ROLE_TO_ASSUME }}
+          role-to-assume: ${{ secrets.SECRETS_AWS_PACKAGING_ROLE_TO_ASSUME }}
           role-duration-seconds: 900
           role-session-name: SecretsManagerFetch
       - name: Get bot user token
-        uses: aws-actions/aws-secretsmanager-get-secrets@v1
+        uses: aws-actions/aws-secretsmanager-get-secrets@v2
         with:
           parse-json-secrets: true
           secret-ids: |
-            OSDS,arn:aws:secretsmanager:us-west-2:294535624312:secret:github-aws-sdk-osds-automation-ZHNalp
+            ${{ secrets.OSDS_PACKAGING_ROLE }}
       - name: Commit
         run: |
           echo "::add-mask::${{ env.OSDS_ACCESS_TOKEN }}"
@@ -46,5 +47,6 @@ jobs:
           git config user.email "github-aws-sdk-osds-automation@amazon.com"
           git remote set-url origin https://${{ env.OSDS_ACCESS_TOKEN }}@github.com/aws-actions/configure-aws-credentials.git
           git add dist
+          git add THIRD-PARTY
           git commit -m "chore: Update dist" || echo "No changes to commit"
-          git push origin
+          git push --force origin

.github/workflows/pull-request-lint.yml

@@ -0,0 +1,27 @@
+
+name: pull-request-lint
+on:
+  pull_request_target:
+    types:
+      - labeled
+      - opened
+      - synchronize
+      - reopened
+      - ready_for_review
+      - edited
+jobs:
+  validate:
+    name: Validate PR title
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: amannn/action-semantic-pull-request@v5.5.3
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          types: |-
+            feat
+            fix
+            chore
+          requireScope: false

.github/workflows/release-please.yml

@@ -0,0 +1,45 @@
+---
+  name: Release Please
+  on:
+    push:
+      branches:
+        - main
+    workflow_dispatch:
+
+  permissions:
+    id-token: write
+    contents: write
+    pull-requests: write
+
+  jobs:
+    release-please:
+      runs-on: ubuntu-latest
+      steps:
+        - name: Checkout Repository
+          uses: actions/checkout@v5
+          with:
+            fetch-depth: 0
+
+        - name: Configure AWS Credentials
+          uses: aws-actions/configure-aws-credentials@v6
+          with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.SECRETS_AWS_PACKAGING_ROLE_TO_ASSUME }}
+            role-duration-seconds: 900
+            role-session-name: ${{ github.run_id }}
+
+        - name: Get git credentials
+          uses: aws-actions/aws-secretsmanager-get-secrets@v2
+          with:
+            parse-json-secrets: true
+            secret-ids: |
+              ${{ secrets.OSDS_PACKAGING_ROLE }}
+
+        - name: Run release-please
+          uses: googleapis/release-please-action@v4
+          with:
+            release-type: node
+            token: ${{ env.OSDS_ACCESS_TOKEN }}
+            config-file: release-please-config.json
+            manifest-file: .release-please-manifest.json
+            

.github/workflows/tests-integ-push.yml

@@ -0,0 +1,32 @@
+name: Run post-release integration test
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'dist/**'  
+  workflow_dispatch:
+
+jobs:
+  package_and_test:
+    name: Package dist files
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+      - name: Integation tests
+        uses: ./
+        with:
+          aws-region: us-west-2
+          role-to-assume: ${{ secrets.CAWSC_integ_role }}
+          role-session-name: IntegTestCAWSC
+      - name: Get caller identity
+        run: |
+          aws sts get-caller-identity

.github/workflows/tests-integ-release.yml

@@ -0,0 +1,281 @@
+name: Run pre-release integ tests
+on: 
+    pull_request_target:
+    workflow_dispatch:
+permissions:
+    contents: read
+
+jobs:
+  oidc:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions: 
+        id-token: write
+    strategy: 
+        fail-fast: false
+        matrix:
+            os: [windows-latest, ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    name: OIDC login test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false
+      - name: Configure AWS credentials
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.OIDC_integ_role }}
+      - name: Get Caller Identity
+        run: |
+            aws sts get-caller-identity
+
+  #can cut this test out if it's not necessary
+  static_assumeRole:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions:
+        id-token: write
+    strategy: 
+        fail-fast: false
+        matrix:
+            os: [windows-latest, ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    defaults: 
+        run:
+            shell: bash
+    name: Static IAM creds test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false
+      - name: assume creator Role
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.STATIC_USER_CREATION_ROLE }}
+      - name: create and mask access key
+        id: create-key
+        run: | 
+            AK_OUTPUT=$(aws iam create-access-key --user-name integ-test-static-user-${{ runner.os }})
+            AK_ID=$(echo $AK_OUTPUT | jq -r '.AccessKey.AccessKeyId')
+            SECRET_AK=$(echo $AK_OUTPUT | jq -r '.AccessKey.SecretAccessKey')
+            echo "::add-mask::$AK_ID"
+            echo "::add-mask::$SECRET_AK"
+            echo "STATIC_ACCESS_KEY_ID=$AK_ID" >> $GITHUB_OUTPUT
+            echo "STATIC_SECRET_ACCESS_KEY=$SECRET_AK" >> $GITHUB_OUTPUT
+      - name: sleep so key can propagate
+        run: sleep 30
+      - name: assume role with static creds
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.STATIC_TEST_TARGET_ROLE }}
+            aws-access-key-id: ${{ steps.create-key.outputs.STATIC_ACCESS_KEY_ID }}
+            aws-secret-access-key: ${{ steps.create-key.outputs.STATIC_SECRET_ACCESS_KEY }}
+      - name: check account
+        run: aws sts get-caller-identity
+      - name: log back into creator role
+        if: success() || failure()
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.STATIC_USER_CREATION_ROLE }}
+      - name: delete access key
+        if: success() || failure()
+        run: |
+            aws iam delete-access-key --user-name integ-test-static-user-${{ runner.os }} --access-key-id ${{ steps.create-key.outputs.STATIC_ACCESS_KEY_ID }}
+
+  role_chaining:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions: 
+        id-token: write
+    strategy: 
+        fail-fast: false
+        matrix:
+            os: [windows-latest, ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    name: Existing Creds + Role Chaining test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false    
+      - name: Configure AWS credentials
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.ROLE_chaining_1 }}
+      - name: Get Caller Identity
+        run: |
+          aws sts get-caller-identity
+      - name: assume second role
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.ROLE_chaining_2 }}
+            role-chaining: true
+      - name: get caller identity
+        run: |
+          aws sts get-caller-identity
+
+  inline_policy:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions: 
+        id-token: write
+    strategy: 
+        fail-fast: false
+        matrix:
+            os: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    name: Inline Policy Test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false  
+      - name: get creds w scoped down policy
+        uses: ./
+        with: 
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.INLINE_policy_role }}
+            inline-session-policy: '{"Version":"2012-10-17","Statement":[{"Sid":"Stmt1","Effect":"Allow","Action":"s3:ListAllMyBuckets","Resource":"*"}]}'
+    
+      #NOTE: This step should succeed. The role should have permission only to list all buckets.
+      - name: list buckets
+        run: aws s3 ls > /dev/null
+
+      #NOTE: This step should fail. we don't want the role to have permission to see the bucket contents.    
+      - name: try to list bucket contents
+        id: bucketContentsStep
+        continue-on-error: true
+        run: aws s3 ls s3://cawsc-integ-tests-bucket > /dev/null
+
+      #But the test fails if we could list the bucket contents.
+      - name: fail if we can list bucket contents
+        if: steps.bucketContentsStep.outcome == 'success'
+        run: exit 1
+
+  http-proxy:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions:
+        id-token: write
+    runs-on: ubuntu-latest
+    name: HTTP Proxy Test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false  
+      - name: install tinyproxy
+        run: |
+          sudo apt-get update
+          sudo apt-get -y install tinyproxy
+      - name: start tinyproxy
+        run: tinyproxy -c .github/integ_tests/tinyproxy.conf
+      - name: Configure AWS credentials
+        continue-on-error: true
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.OIDC_integ_role }}
+            http-proxy: http://127.0.0.1:9999
+            retry-max-attempts: 4
+      - name: checkout logs 
+        run: cat integ_proxy_log.txt
+      - name: check logs to see if successful call
+        run: grep -q "Request" integ_proxy_log.txt && echo "PROXY_CALL_LOGGED=1" >> $GITHUB_ENV || echo "PROXY_CALL_LOGGED=0" >> $GITHUB_ENV
+      - name: fail job if bad call 
+        if: ${{ env.PROXY_CALL_LOGGED != 1 }}
+        run: exit 1
+
+  token-file:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions:
+        id-token: write
+    strategy: 
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    name: Token File Test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false
+      - name: fetch token and write to file
+        uses: actions/github-script@v8
+        with:
+          script: |
+            const fs = require('fs');
+            async function getIDTokenAction() {
+              const id_token = await core.getIDToken("sts.amazonaws.com");
+              return id_token;
+            }
+            const idToken = await getIDTokenAction();
+            fs.writeFileSync(".github/integ_tests/integ_token.txt", idToken, (err) => {
+              if (err) throw err;
+            });
+      - name: get creds with that file
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.OIDC_integ_role }}
+            web-identity-token-file: .github/integ_tests/integ_token.txt
+            retry-max-attempts: 4
+      - name: check creds
+        run: aws sts get-caller-identity
+
+  profile-oidc:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions: 
+        id-token: write
+    strategy: 
+        fail-fast: false
+        matrix:
+            os: [windows-latest, ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    name: OIDC profile writing test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false
+
+      - name: make profile 1
+        uses: ./
+        with: 
+          aws-region: us-east-1
+          role-to-assume: ${{ secrets.INTEG_PROFILE_ROLE_1 }}
+          aws-profile: TestProfile1
+
+      - name: make profile 2
+        uses: ./
+        with: 
+          aws-region: us-east-2
+          role-to-assume: ${{ secrets.INTEG_PROFILE_ROLE_2 }}
+          aws-profile: TestProfile2
+          
+      - name: check profile1 
+        run: aws sts get-caller-identity --profile TestProfile1
+      
+      - name: check profile2
+        run: aws sts get-caller-identity --profile TestProfile2
+
+      - name: Get Caller Identity
+        id: no-creds-sts-step
+        continue-on-error: true
+        run: |
+            aws sts get-caller-identity
+
+      - name: fail if we got caller id with env creds
+        if: steps.no-creds-sts-step.outcome == 'success'
+        run: exit 1

.github/workflows/tests-unit.yml

@@ -0,0 +1,42 @@
+on:
+  [pull_request]
+
+name: Run unit tests
+permissions:
+  contents: read
+
+jobs:
+  unit-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-latest]
+    name: Run unit tests
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 5
+    steps:
+      - name: "Checkout repository"
+        uses: actions/checkout@v5
+      - name: "Setup node"
+        uses: actions/setup-node@v4.4.0
+        with:
+          node-version: 20
+      - name: "Install dependencies"
+        run: npm ci
+      - name: "Run tests"
+        run: npm run test --if-present
+  lint:
+    name: Ensure code standards
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: "Checkout repostiory"
+        uses: actions/checkout@v5
+      - name: "Setup node"
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - name: "Install dependencies"
+        uses: bahmutov/npm-install@v1
+      - name: "Lint code"
+        run: npm run lint --if-present

.gitignore

@@ -1,66 +1,6 @@
-node_modules/
-
-# Editors
-.vscode
-.idea
-
-# Logs
-logs
-*.log
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-
-# Runtime data
-pids
-*.pid
-*.seed
-*.pid.lock
-
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
-
-# Coverage directory used by tools like istanbul
+node_modules
 coverage
-
-# nyc test coverage
-.nyc_output
-
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# Bower dependency directory (https://bower.io/)
-bower_components
-
-# node-waf configuration
-.lock-wscript
-
-# Compiled binary addons (https://nodejs.org/api/addons.html)
-build/Release
-
-# Other Dependency directories
-jspm_packages/
-
-# TypeScript v1 declaration files
-typings/
-
-# Optional npm cache directory
-.npm
-
-# Optional eslint cache
-.eslintcache
-
-# Optional REPL history
-.node_repl_history
-
-# Output of 'npm pack'
-*.tgz
-
-# Yarn Integrity file
-.yarn-integrity
-
-# dotenv environment variables file
-.env
-
-# next.js build output
-.next
+.DS_Store
+Thumbs.db
+build
+test-reports

.markdownlint.yaml

@@ -0,0 +1,17 @@
+default: true
+MD007:
+  indent: 4
+heading-style:
+  style: atx
+ul-style:
+  style: dash
+line-length:
+  stern: true
+  tables: false
+  code_blocks: false
+no-inline-html:
+  allowed_elements:
+    - details
+    - summary
+code-block-style:
+  style: fenced

.mergify.yml

@@ -1,38 +0,0 @@
-queue_rules:
-  - name: default
-    conditions:
-      # Conditions to get out of the queue (= merged)
-      - status-success=Run Unit Tests
-
-pull_request_rules:
-  - name: Automatically merge on CI success and review approval
-    conditions:
-      - base~=main|integ-tests
-      - "#approved-reviews-by>=1"
-      - -approved-reviews-by~=author
-      - status-success=Run Unit Tests
-      - label!=work-in-progress
-      - -title~=(WIP|wip)
-      - -merged
-      - -closed
-      - author!=dependabot[bot]
-    actions:
-      queue:
-        method: squash
-        name: default
-
-  - name: Automatically approve and merge Dependabot PRs
-    conditions:
-      - base~=main
-      - author=dependabot[bot]
-      - status-success=Run Unit Tests
-      - -title~=(WIP|wip)
-      - -label~=(blocked|do-not-merge)
-      - -merged
-      - -closed
-    actions:
-      review:
-        type: APPROVE
-      queue:
-        method: squash
-        name: default

.release-please-manifest.json

@@ -0,0 +1,5 @@
+{
+  ".release-please-manifest.json": "4.0.2",
+  "package.json": "6.0.0",
+  ".": "6.1.0"
+}

CHANGELOG.md

@@ -2,6 +2,198 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+## [6.1.0](https://github.com/aws-actions/configure-aws-credentials/compare/v6.0.0...v6.1.0) (2026-04-06)
+
+
+### Features
+
+* add skip cleanup option ([#1716](https://github.com/aws-actions/configure-aws-credentials/issues/1716)) ([11b1c58](https://github.com/aws-actions/configure-aws-credentials/commit/11b1c58b24724e66aa52a847862a0c1b0c4b0c7b)), closes [#1545](https://github.com/aws-actions/configure-aws-credentials/issues/1545)
+* Support usage of AWS Profiles ([#1696](https://github.com/aws-actions/configure-aws-credentials/issues/1696)) ([a7f0c82](https://github.com/aws-actions/configure-aws-credentials/commit/a7f0c828ac76e0d049e34c920172c60f579f9eb3))
+
+## [6.0.0](https://github.com/aws-actions/configure-aws-credentials/compare/v5.1.1...v6.0.0) (2026-02-04)
+
+
+### ⚠ BREAKING CHANGES
+
+* Update action to use node24 ([#1632](https://github.com/aws-actions/configure-aws-credentials/pull/1632)) ([a7a2c11](https://github.com/aws-actions/configure-aws-credentials/commit/a7a2c1125c67f40a1e95768f4e4a7d8f019f87af))
+
+### Features
+
+* add support to define transitive tag keys ([#1316](https://github.com/aws-actions/configure-aws-credentials/pull/1316)) ([232435c](https://github.com/aws-actions/configure-aws-credentials/commit/232435c0c05e51137544f0203931b84893d13b74)) ([930ebd9](https://github.com/aws-actions/configure-aws-credentials/pull/1628/changes/930ebd9bcaed959c3ba9e21567e8abbc3cae72c0))
+
+### Bug Fixes
+
+* properly output `aws-account-id` and `authenticated-arn` when using role-chaining ([#1633](https://github.com/aws-actions/configure-aws-credentials/pull/1633)) ([7ceaf96](https://github.com/aws-actions/configure-aws-credentials/commit/7ceaf96edc86cc1713cef59eba79feeb23f59da1))
+
+## [5.1.1](https://github.com/aws-actions/configure-aws-credentials/compare/v5.1.0...v5.1.1) (2025-11-24)
+
+
+### Miscellaneous Chores
+
+* release 5.1.1 ([56d6a58](https://github.com/aws-actions/configure-aws-credentials/commit/56d6a583f00f6bad6d19d91d53a7bc3b8143d0e9))
+
+## [5.1.0](https://github.com/aws-actions/configure-aws-credentials/compare/v5.0.0...v5.1.0) (2025-10-06)
+
+
+### Features
+
+* Add global timeout support ([#1487](https://github.com/aws-actions/configure-aws-credentials/issues/1487)) ([1584b8b](https://github.com/aws-actions/configure-aws-credentials/commit/1584b8b0e2062557287c28fbe9b8920df434e866))
+* add no-proxy support ([#1482](https://github.com/aws-actions/configure-aws-credentials/issues/1482)) ([dde9b22](https://github.com/aws-actions/configure-aws-credentials/commit/dde9b22a8e889a0821997a21a2c5a38020ee8de3))
+* Improve debug logging in retry logic ([#1485](https://github.com/aws-actions/configure-aws-credentials/issues/1485)) ([97ef425](https://github.com/aws-actions/configure-aws-credentials/commit/97ef425d73aa532439f54f90d0e83101a186c5a6))
+
+
+### Bug Fixes
+
+* properly expose getProxyForUrl (introduced in [#1482](https://github.com/aws-actions/configure-aws-credentials/issues/1482)) ([#1486](https://github.com/aws-actions/configure-aws-credentials/issues/1486)) ([cea4298](https://github.com/aws-actions/configure-aws-credentials/commit/cea42985ac88b42678fbc84c18066a7f07f05176))
+
+## [5.0.0](https://github.com/aws-actions/configure-aws-credentials/compare/v4.3.1...v5.0.0) (2025-09-03)
+
+
+### ⚠ BREAKING CHANGES
+
+* Cleanup input handling. Changes invalid boolean input behavior (see #1445)
+
+### Features
+
+* add skip OIDC option ([#1458](https://github.com/aws-actions/configure-aws-credentials/issues/1458)) ([8c45f6b](https://github.com/aws-actions/configure-aws-credentials/commit/8c45f6b08196feb86cfdbe431541d5571d9ab2c2))
+* Cleanup input handling. Changes invalid boolean input behavior (see [#1445](https://github.com/aws-actions/configure-aws-credentials/issues/1445)) ([74b3e27](https://github.com/aws-actions/configure-aws-credentials/commit/74b3e27aa80db064b5bb8c04b22fc607e817acf7))
+* support account id allowlist ([#1456](https://github.com/aws-actions/configure-aws-credentials/issues/1456)) ([c4be498](https://github.com/aws-actions/configure-aws-credentials/commit/c4be498953fc1da2707a50ce4b761a53af3d02af))
+
+## [4.3.1](https://github.com/aws-actions/configure-aws-credentials/compare/v4.3.0...v4.3.1) (2025-08-04)
+
+
+### Bug Fixes
+
+* update readme to 4.3.1 ([#1424](https://github.com/aws-actions/configure-aws-credentials/issues/1424)) ([be2e7ad](https://github.com/aws-actions/configure-aws-credentials/commit/be2e7ad815e27b890489a89ce2717b0f9e26b56e))
+
+## [4.3.0](https://github.com/aws-actions/configure-aws-credentials/compare/v4.2.1...v4.3.0) (2025-08-04)
+
+
+### Features
+
+* depenency update and feature cleanup ([#1414](https://github.com/aws-actions/configure-aws-credentials/issues/1414)) ([59489ba](https://github.com/aws-actions/configure-aws-credentials/commit/59489ba544930000b7b67412c167f5fe816568cf)), closes [#1062](https://github.com/aws-actions/configure-aws-credentials/issues/1062) [#1191](https://github.com/aws-actions/configure-aws-credentials/issues/1191)
+* Optional environment variable output ([c3b3ce6](https://github.com/aws-actions/configure-aws-credentials/commit/c3b3ce61b02510937ff02916a4eb153874bc5085))
+
+
+### Bug Fixes
+
+* **docs:** readme samples versioning ([5b3c895](https://github.com/aws-actions/configure-aws-credentials/commit/5b3c89504689ea1ea2b6000b23a6a2aac463662a))
+* the wrong example region for China partition in README ([37fe9a7](https://github.com/aws-actions/configure-aws-credentials/commit/37fe9a740bcb30ee8cccd96feb90666c937311f2))
+* properly set proxy environment variable ([cbea708](https://github.com/aws-actions/configure-aws-credentials/commit/cbea70821e4ab985ad3be0e5a93390523e257cde))
+
+
+### Miscellaneous Chores
+
+* release 4.3.0 ([3f7c218](https://github.com/aws-actions/configure-aws-credentials/commit/3f7c2187213bafaa1ea60a850b27082cbf55dda0))
+
+## [4.2.1](https://github.com/aws-actions/configure-aws-credentials/compare/v4.2.0...v4.2.1) (2025-05-14)
+
+
+### Bug Fixes
+
+* ensure explicit inputs take precedence over environment variables ([e56e6c4](https://github.com/aws-actions/configure-aws-credentials/commit/e56e6c4038915cd5a7238a671fe97f44c98a40b0))
+* prioritize explicit inputs over environment variables ([df9c8fe](https://github.com/aws-actions/configure-aws-credentials/commit/df9c8fed6b364f0d1fb0e6e03a0ec26f1ea4e3fc))
+
+## [4.2.0](https://github.com/aws-actions/configure-aws-credentials/compare/v4.1.0...v4.2.0) (2025-05-06)
+
+
+### Features
+
+* add Expiration field to Outputs ([a4f3267](https://github.com/aws-actions/configure-aws-credentials/commit/a4f326760c1c1bf49ab86051c658d6501816b930))
+* Document role-duration-seconds range ([5a0cf01](https://github.com/aws-actions/configure-aws-credentials/commit/5a0cf0167f837dfa7af7d951ba6a78a38dc2b79e))
+* support action inputs as environment variables ([#1338](https://github.com/aws-actions/configure-aws-credentials/issues/1338)) ([2c168ad](https://github.com/aws-actions/configure-aws-credentials/commit/2c168adcae62d67531ba83842723c8f30695116a))
+
+
+### Bug Fixes
+
+* make sure action builds, also fix dependabot autoapprove ([c401b8a](https://github.com/aws-actions/configure-aws-credentials/commit/c401b8a98c5067672f52e0387cdd87d54acfe1fd))
+* role chaning on mulitple runs ([#1340](https://github.com/aws-actions/configure-aws-credentials/issues/1340)) ([9e38641](https://github.com/aws-actions/configure-aws-credentials/commit/9e386419117a9edd458297e4f1822a5df7506a03))
+
+## [4.1.0](https://github.com/aws-actions/configure-aws-credentials/compare/v4.0.3...v4.1.0) (2025-02-08)
+
+
+### Features
+
+* idempotent fetch ([#1289](https://github.com/aws-actions/configure-aws-credentials/issues/1289)) ([eb70354](https://github.com/aws-actions/configure-aws-credentials/commit/eb70354fb423a380b6e4ab4b9f15d2ee9ffae911))
+
+
+### Bug Fixes
+
+* build failure due to tests ([#1283](https://github.com/aws-actions/configure-aws-credentials/issues/1283)) ([134d71e](https://github.com/aws-actions/configure-aws-credentials/commit/134d71efe0ecbe9ad6965f2f766c0cae63a7685f))
+* Dependabot autoapprove ([#1284](https://github.com/aws-actions/configure-aws-credentials/issues/1284)) ([b9ee51d](https://github.com/aws-actions/configure-aws-credentials/commit/b9ee51dc600fe38c892e24f60ca26476e0e0b6de))
+* Dependabot autoapprove id-token write permission ([#1285](https://github.com/aws-actions/configure-aws-credentials/issues/1285)) ([f0af89b](https://github.com/aws-actions/configure-aws-credentials/commit/f0af89b102390dcf10ce402195d74a98f24861f3))
+* typo ([#1281](https://github.com/aws-actions/configure-aws-credentials/issues/1281)) ([39fd91c](https://github.com/aws-actions/configure-aws-credentials/commit/39fd91c08ed8bf770034de4e62662503e8007d76))
+
+## [4.0.3](https://github.com/aws-actions/configure-aws-credentials/compare/v4.0.2...v4.0.3) (2025-01-27)
+
+
+### Features
+
+* added release-please action config ([0f88004](https://github.com/aws-actions/configure-aws-credentials/commit/0f88004d9c27e0bdbbc254b3f7c8053cb38f04d7))
+
+
+### Bug Fixes
+
+* add id-token permission to automerge ([97834a4](https://github.com/aws-actions/configure-aws-credentials/commit/97834a484a5ab3c40fa9e2eb40fcf8041105a573))
+* cpy syntax on npm package ([#1195](https://github.com/aws-actions/configure-aws-credentials/issues/1195)) ([83b5a56](https://github.com/aws-actions/configure-aws-credentials/commit/83b5a565471214aec459e234bef606339fe07111))
+* force push packaged files to main ([bfd2185](https://github.com/aws-actions/configure-aws-credentials/commit/bfd218503eb87938c29603a551e19c6b594f5fe5))
+
+
+### Miscellaneous Chores
+
+* release 4.0.3 ([ca00fd4](https://github.com/aws-actions/configure-aws-credentials/commit/ca00fd4d3842ad58c3c21ebfe69defa1f0e7bdc4))
+
+## [4.0.2](https://github.com/aws-actions/configure-aws-credentials/compare/v4.0.1...v4.0.2) (2024-02-09)
+
+* Revert 4.0.1 to remove warning
+
+## [4.0.1](https://github.com/aws-actions/configure-aws-credentials/compare/v4.0.0...v4.0.1) (2023-10-03)
+
+### Documentation
+*  Throw a warning when customers use long-term credentials.
+
+## [4.0.0](https://github.com/aws-actions/configure-aws-credentials/compare/v3.0.2...v4.0.0) (2023-09-11)
+
+* Upgraded runtime to `node20` from `node16`
+
+## [3.0.2](https://github.com/aws-actions/configure-aws-credentials/compare/v3.0.1...v3.0.2) (2023-09-07)
+
+### Bug Fixes
+* fixes #817 #819: validation logic throwing unwanted errors [d78f55b](https://github.com/aws-actions/configure-aws-credentials/commit/d78f55b1db65186cb251a8504ae9527af06fc5fd)
+
+## [3.0.1](https://github.com/aws-actions/configure-aws-credentials/compare/v3.0.0...v3.0.1) (2023-08-24)
+
+### Features
+* Can configure `special-characters-workaround` to keep retrying credentials if the returned
+  credentials have special characters (Fixes #599)
+
+### Bug Fixes
+* Fixes #792: Action fails when intending to use existing credentials
+* Minor typo fix from @ubaid-ansari21
+
+### Changes to existing functionality
+* Special characters are now allowed in returned credential variables unless you configure the
+  `special-characters-workaround` option
+
+## [3.0.0](https://github.com/aws-actions/configure-aws-credentials/compare/v2.2.0...v3.0.0) (2023-08-21)
+
+### Features
+* Can configure `max-retries` and `disable-retry` to modify retry functionality when the assume role call fails
+* Set returned credentials as step outputs with `output-credentials`
+* Clear AWS related environment variables at the start of the action with `unset-current-credentials`
+* Unique role identifier is now printed in the workflow logs
+
+### Bug Fixes
+* Can't use credentials if they contain a special character
+* Retry functionality added when generating the JWT fails
+* Can now use `webIdentityTokenFile` option
+* Branch name validation too strict
+* JS SDK v2 deprecation warning in workflow logs
+
+### Changes to existing functionality
+* Default session duration is now 1 hour in all cases (from 6 hours in some cases)
+* Account ID will not be masked by default in logs
+
 ## [2.2.0](https://github.com/aws-actions/configure-aws-credentials/compare/v2.1.0...v2.2.0) (2023-05-31)
 
 ### Features

CODE_OF_CONDUCT.md

@@ -1,4 +1,8 @@
-## Code of Conduct
-This project has adopted the [Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct).
-For more information see the [Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact
-opensource-codeofconduct@amazon.com with any additional questions or comments.
+# Code of Conduct
+
+This project has adopted the
+[Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct). For
+more information see the
+[Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact
+<opensource-codeofconduct@amazon.com> with any additional questions or
+comments.

CONTRIBUTING.md

@@ -1,61 +1,117 @@
 # Contributing Guidelines
 
-Thank you for your interest in contributing to our project. Whether it's a bug report, new feature, correction, or additional
-documentation, we greatly value feedback and contributions from our community.
-
-Please read through this document before submitting any issues or pull requests to ensure we have all the necessary
-information to effectively respond to your bug report or contribution.
+Thank you for your interest in contributing to our project. Whether it's a bug
+report, new feature, correction, or additional documentation, we greatly value
+feedback and contributions from our community.
 
+Please read through this document before submitting any issues or pull requests
+to ensure we have all the necessary information to effectively respond to your
+bug report or contribution.
 
 ## Reporting Bugs/Feature Requests
 
-We welcome you to use the GitHub issue tracker to report bugs or suggest features.
+We welcome you to use the GitHub issue tracker to report bugs or suggest
+features.
 
-When filing an issue, please check [existing open](https://github.com/aws-actions/configure-aws-credentials/issues), or [recently closed](https://github.com/aws-actions/configure-aws-credentials/issues?utf8=%E2%9C%93&q=is%3Aissue%20is%3Aclosed%20), issues to make sure somebody else hasn't already
-reported the issue. Please try to include as much information as you can. Details like these are incredibly useful:
+When filing an issue, please check [existing open][open-issues],
+or [recently closed][closed-issues], issues to make sure somebody
+else hasn't already reported the issue.
 
-* A reproducible test case or series of steps
-* The version of our code being used
-* Any modifications you've made relevant to the bug
-* Anything unusual about your environment or deployment
+[open-issues]: https://github.com/aws-actions/configure-aws-credentials/issues
+[closed-issues]: https://github.com/aws-actions/configure-aws-credentials/issues?utf8=%E2%9C%93&q=is%3Aissue%20is%3Aclosed%20
 
+Please try to include as much information as you can. Details like
+these are incredibly useful:
+
+- A reproducible test case or series of steps
+- The version of our code being used
+- Any modifications you've made relevant to the bug
+- Anything unusual about your environment or deployment
 
 ## Contributing via Pull Requests
-Contributions via pull requests are much appreciated. Before sending us a pull request, please ensure that:
 
-1. You are working against the latest source on the *main* branch.
-2. You check existing open, and recently merged, pull requests to make sure someone else hasn't addressed the problem already.
-3. You open an issue to discuss any significant work - we would hate for your time to be wasted.
+Contributions via pull requests are much appreciated. Before sending us a pull
+request, please ensure that:
+
+1. You are working against the latest source on the _main_ branch.
+2. You check existing open, and recently merged, pull requests to make sure
+   someone else hasn't addressed the problem already.
+3. You open an issue to discuss any significant work - we would hate for your
+   time to be wasted.
 
 To send us a pull request, please:
 
 1. Fork the repository.
-2. Modify the source; please focus on the specific change you are contributing. If you also reformat all the code, it will be hard for us to focus on your change.
+2. Modify the source; please focus on the specific change you are contributing.
+   If you also reformat all the code, it will be hard for us to focus on your
+   change.
 3. Ensure local tests pass.
 4. Commit to your fork using clear commit messages.
-5. Send us a pull request, answering any default questions in the pull request interface.
-6. Pay attention to any automated CI failures reported in the pull request, and stay involved in the conversation.
+5. Send us a pull request, answering any default questions in the pull request
+   interface.
+6. Pay attention to any automated CI failures reported in the pull request, and
+   stay involved in the conversation.
 
-GitHub provides additional document on [forking a repository](https://help.github.com/articles/fork-a-repo/) and
-[creating a pull request](https://help.github.com/articles/creating-a-pull-request/).
+GitHub provides additional document on
+[forking a repository](https://help.github.com/articles/fork-a-repo/) and
+[creating a pull request][create-pr].
 
+[create-pr]:
+  https://help.github.com/articles/creating-a-pull-request/
 
 ## Finding contributions to work on
-Looking at the existing issues is a great way to find something to contribute on. As our projects, by default, use the default GitHub issue labels (enhancement/bug/duplicate/help wanted/invalid/question/wontfix), looking at any ['help wanted'](https://github.com/aws-actions/configure-aws-credentials/labels/help%20wanted) issues is a great place to start.
 
+Looking at the existing issues is a great way to find something to contribute
+on. As our projects, by default, use the default GitHub issue labels
+(enhancement/bug/duplicate/help wanted/invalid/question/wontfix), looking at any
+['help wanted'](https://github.com/aws-actions/configure-aws-credentials/labels/help%20wanted)
+issues is a great place to start.
 
 ## Code of Conduct
-This project has adopted the [Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct).
-For more information see the [Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact
-opensource-codeofconduct@amazon.com with any additional questions or comments.
 
+This project has adopted the
+[Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct). For
+more information see the
+[Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact
+<opensource-codeofconduct@amazon.com> with any additional questions or
+comments.
 
 ## Security issue notifications
-If you discover a potential security issue in this project we ask that you notify AWS/Amazon Security via our [vulnerability reporting page](http://aws.amazon.com/security/vulnerability-reporting/). Please do **not** create a public github issue.
 
+If you discover a potential security issue in this project we ask that you
+notify AWS/Amazon Security via our
+[vulnerability reporting page][vuln-report].
+
+[vuln-report]:
+  http://aws.amazon.com/security/vulnerability-reporting/
+Please do **not** create a public github issue.
+
+## Automated Tools
+
+The use of AI tooling for assisted development work is accepted and encouraged
+in this repository, but due to the volume of submissions we ask that you observe
+the following rules:
+
+- All issue and pull request submissions to this repository that are sourced by
+  AI must first be reviewed by a human before submitting to the repository.
+  Items reviewed in this way must include a statement like "generated by AI
+  tools, and reviewed by [person]"
+- Please ensure that your submissions are actually improvements. While we are
+  grateful for any proposed fixes, even if they are very small, behavior that
+  looks like creating noisy PRs or artificially inflating submission counts
+  is not acceptable.
+- We may close issues or pull requests, or limit your ability to interact with
+  this repository, for behavior that in our estimation violates these rules or
+  any of the other rules in this repository's
+  [Code of Conduct](CODE_OF_CONDUCT.md).
 
 ## Licensing
 
-See the [LICENSE](https://github.com/aws-actions/configure-aws-credentials/blob/main/LICENSE) file for our project's licensing. We will ask you to confirm the licensing of your contribution.
+See the
+[LICENSE](https://github.com/aws-actions/configure-aws-credentials/blob/main/LICENSE)
+file for our project's licensing. We will ask you to confirm the licensing of
+your contribution.
 
-We may ask you to sign a [Contributor License Agreement (CLA)](http://en.wikipedia.org/wiki/Contributor_License_Agreement) for larger changes.
+We may ask you to sign a
+[Contributor License Agreement (CLA)](http://en.wikipedia.org/wiki/Contributor_License_Agreement)
+for larger changes.

LICENSE

@@ -1,6 +1,4 @@
-MIT License
-
-Copyright 2019 Amazon.com, Inc. or its affiliates.
+Copyright (c) 2019-2022 Amazon.com, Inc. or its affiliates
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

__mocks__/fs.cjs

@@ -0,0 +1,2 @@
+const { fs } = require('memfs');
+module.exports = fs;

action.yml

@@ -1,76 +1,115 @@
-name: 'Configure AWS Credentials For GitHub Actions'
-description: 'Configure AWS credential and region environment variables for use with the AWS CLI and AWS SDKs'
+
+name: '"Configure AWS Credentials" Action for GitHub Actions'
+description: Configures AWS credentials for use in subsequent steps in a GitHub Action workflow
+runs:
+  using: node24
+  main: dist/index.js
+  post: dist/cleanup/index.js
+  post-if: env.AWS_SKIP_CLEANUP_STEP != 'true'
 branding:
-  icon: 'cloud'
-  color: 'orange'
+  color: orange
+  icon: cloud
 inputs:
-  audience:
-    default: 'sts.amazonaws.com'
-    description: 'The audience to use for the OIDC provider'
-    required: false
-  aws-access-key-id:
-    description: >-
-      AWS Access Key ID. This input is required if running in the GitHub hosted environment.
-      It is optional if running in a self-hosted environment that already has AWS credentials,
-      for example on an EC2 instance.
-    required: false
-  aws-secret-access-key:
-    description: >-
-      AWS Secret Access Key. This input is required if running in the GitHub hosted environment.
-      It is optional if running in a self-hosted environment that already has AWS credentials,
-      for example on an EC2 instance.
-    required: false
-  aws-session-token:
-    description: 'AWS Session Token'
-    required: false
   aws-region:
-    description: 'AWS Region, e.g. us-east-2'
+    description: AWS Region, e.g. us-east-2
     required: true
-  mask-aws-account-id:
-    description: >-
-      Whether to set the AWS account ID for these credentials as a secret value,
-      so that it is masked in logs. Valid values are 'true' and 'false'.
-      Defaults to true
+  aws-profile:
+    description: Name of the AWS profile to configure. When provided, credentials are written to ~/.aws/credentials and ~/.aws/config files instead of env variables (unless output-env-credentials is manually set to true). Name cannot contain whitespace, square brackets, or slashes.
+    required: false
+  overwrite-aws-profile:
+    description: Overwrite the given AWS profile if it already exists. Requires aws-profile. When set to false or not set, an error will be thrown if the profile already exists.
     required: false
   role-to-assume:
-    description: >-
-      Use the provided credentials to assume an IAM role and configure the Actions
-      environment with the assumed role credentials rather than with the provided
-      credentials
+    description: The Amazon Resource Name (ARN) of the role to assume. Use the provided credentials to assume an IAM role and configure the Actions environment with the assumed role credentials rather than with the provided credentials.
+    required: false
+  aws-access-key-id:
+    description: AWS Access Key ID. Provide this key if you want to assume a role using access keys rather than a web identity token.
+    required: false
+  aws-secret-access-key:
+    description: AWS Secret Access Key. Required if aws-access-key-id is provided.
+    required: false
+  aws-session-token:
+    description: AWS Session Token.
     required: false
   web-identity-token-file:
-    description: >-
-      Use the web identity token file from the provided file system path in order to
-      assume an IAM role using a web identity. E.g., from within an Amazon EKS worker node
-    required: false
-  role-duration-seconds:
-    description: "Role duration in seconds (default: 6 hours, 1 hour for OIDC/specified aws-session-token)"
-    required: false
-  role-session-name:
-    description: 'Role session name (default: GitHubActions)'
-    required: false
-  role-external-id:
-    description: 'The external ID of the role to assume'
-    required: false
-  role-skip-session-tagging:
-    description: 'Skip session tagging during role assumption'
-    required: false
-  http-proxy:
-    description: 'Proxy to use for the AWS SDK agent'
+    description: Use the web identity token file from the provided file system path in order to assume an IAM role using a web identity, e.g. from within an Amazon EKS worker node.
     required: false
   role-chaining:
-    description: 'Use existing credentials from the environment to assume a new role'
+    description: Use existing credentials from the environment to assume a new role, rather than providing credentials as input.
+    required: false
+  audience:
+    description: The audience to use for the OIDC provider
+    required: false
+    default: sts.amazonaws.com
+  http-proxy:
+    description: Proxy to use for the AWS SDK agent
+    required: false
+  no-proxy:
+    description: Hosts to skip for the proxy configuration
+    required: false
+  mask-aws-account-id:
+    description: Whether to mask the AWS account ID for these credentials as a secret value. By default the account ID will not be masked
+    required: false
+  role-duration-seconds:
+    description: Role duration in seconds. Default is one hour.
+    required: false
+  role-external-id:
+    description: The external ID of the role to assume.
+    required: false
+  role-session-name:
+    description: "Role session name (default: GitHubActions)"
+    required: false
+  role-skip-session-tagging:
+    description: Skip session tagging during role assumption
+    required: false
+  transitive-tag-keys:
+    description: Define a list of transitive tag keys to pass when assuming a role
     required: false
   inline-session-policy:
-    description: 'Inline session policy'
+    description: Define an inline session policy to use when assuming a role
     required: false
   managed-session-policies:
-    description: 'List of managed session policies'
+    description: Define a list of managed session policies to use when assuming a role
     required: false
+  output-credentials:
+    description: Whether to set credentials as step output
+    required: false
+  output-env-credentials:
+    description: Whether to export credentials as environment variables. If you set this to false, you probably want to use output-credentials.
+    required: false
+  unset-current-credentials:
+    description: Whether to unset the existing credentials in your runner. May be useful if you run this action multiple times in the same job
+    required: false
+  disable-retry:
+    description: Whether to disable the retry and backoff mechanism when the assume role call fails. By default the retry mechanism is enabled
+    required: false
+  retry-max-attempts:
+    description: The maximum number of attempts it will attempt to retry the assume role call. By default it will retry 12 times
+    required: false
+  special-characters-workaround:
+    description: Some environments do not support special characters in AWS_SECRET_ACCESS_KEY. This option will retry fetching credentials until the secret access key does not contain special characters. This option overrides disable-retry and retry-max-attempts. This option is disabled by default
+    required: false
+  use-existing-credentials:
+    required: false
+    description: When enabled, this option will check if there are already valid credentials in the environment. If there are, new credentials will not be fetched. If there are not, the action will run as normal.
+  allowed-account-ids:
+    required: false
+    description: An option comma-delimited list of expected AWS account IDs. The action will fail if we receive credentials for the wrong account.
+  force-skip-oidc:
+    required: false
+    description: When enabled, this option will skip using GitHub OIDC provider even if the id-token permission is set. This is sometimes useful when using IAM instance credentials.
+  action-timeout-s:
+    required: false
+    description: A global timeout in seconds for the action. When the timeout is reached, the action immediately exits. The default is to run without a timeout.
+
 outputs:
   aws-account-id:
-    description: 'The AWS account ID for the provided credentials'
-runs:
-  using: 'node16'
-  main: 'dist/index.js'
-  post: 'dist/cleanup/index.js'
+    description: The AWS account ID for the provided credentials
+  aws-access-key-id:
+    description: The AWS access key ID for the provided credentials
+  aws-secret-access-key:
+    description: The AWS secret access key for the provided credentials
+  aws-session-token:
+    description: The AWS session token for the provided credentials
+  aws-expiration:
+    description: The expiration time for the provided credentials

biome.jsonc

@@ -0,0 +1,38 @@
+{
+  "formatter": {
+    "indentStyle": "space",
+    "lineWidth": 120,
+    "indentWidth": 2,
+    "lineEnding": "lf",
+    "enabled": true
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "performance": {
+        "noDelete": "off"
+      },
+      "correctness": {
+        // Specifying a radix disables interpretation of 0x as a number (needed for backwards compat)
+        "useParseIntRadix": "off"
+      },
+      "complexity": {
+        "noExtraBooleanCast": "off"
+      }
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "trailingCommas": "all",
+      "jsxQuoteStyle": "double",
+      "quoteStyle": "single",
+      "bracketSpacing": true,
+      "arrowParentheses": "always"
+    }
+  },
+  "json": {
+    "formatter": {
+      "trailingCommas": "none"
+    }
+  }
+}

cleanup.js

@@ -1,36 +0,0 @@
-const core = require('@actions/core');
-
-/**
- * When the GitHub Actions job is done, clean up any environment variables that
- * may have been set by the configure-aws-credentials steps in the job.
- *
- * Environment variables are not intended to be shared across different jobs in
- * the same GitHub Actions workflow: GitHub Actions documentation states that
- * each job runs in a fresh instance.  However, doing our own cleanup will
- * give us additional assurance that these environment variables are not shared
- * with any other jobs.
- */
-
-async function cleanup() {
-  try {
-    // The GitHub Actions toolkit does not have an option to completely unset
-    // environment variables, so we overwrite the current value with an empty
-    // string. The AWS CLI and AWS SDKs will behave correctly: they treat an
-    // empty string value as if the environment variable does not exist.
-    core.exportVariable('AWS_ACCESS_KEY_ID', '');
-    core.exportVariable('AWS_SECRET_ACCESS_KEY', '');
-    core.exportVariable('AWS_SESSION_TOKEN', '');
-    core.exportVariable('AWS_DEFAULT_REGION', '');
-    core.exportVariable('AWS_REGION', '');
-  }
-  catch (error) {
-    core.setFailed(error.message);
-  }
-}
-
-module.exports = cleanup;
-
-/* istanbul ignore next */
-if (require.main === module) {
-  cleanup();
-}

cleanup.test.js

@@ -1,51 +0,0 @@
-const core = require('@actions/core');
-const cleanup = require('./cleanup.js');
-
-jest.mock('@actions/core');
-
-const FAKE_ACCESS_KEY_ID = 'MY-AWS-ACCESS-KEY-ID';
-const FAKE_SECRET_ACCESS_KEY = 'MY-AWS-SECRET-ACCESS-KEY';
-const FAKE_SESSION_TOKEN = 'MY-AWS-SESSION-TOKEN';
-const FAKE_REGION = 'fake-region-1';
-const ACTION_ENVIRONMENT_VARIABLES = {
-    AWS_ACCESS_KEY_ID: FAKE_ACCESS_KEY_ID,
-    AWS_SECRET_ACCESS_KEY: FAKE_SECRET_ACCESS_KEY,
-    AWS_SESSION_TOKEN: FAKE_SESSION_TOKEN,
-    AWS_DEFAULT_REGION: FAKE_REGION,
-    AWS_REGION: FAKE_REGION,
-};
-
-describe('Configure AWS Credentials', () => {
-    const OLD_ENV = process.env;
-
-    beforeEach(() => {
-        jest.resetModules();
-        process.env = {...OLD_ENV, ...ACTION_ENVIRONMENT_VARIABLES};
-    });
-
-    afterEach(() => {
-        process.env = OLD_ENV;
-    });
-
-    test('replaces AWS credential and region env vars with empty strings', async () => {
-        await cleanup();
-        expect(core.setFailed).toHaveBeenCalledTimes(0);
-        expect(core.exportVariable).toHaveBeenCalledTimes(5);
-        expect(core.exportVariable).toHaveBeenCalledWith('AWS_ACCESS_KEY_ID', '');
-        expect(core.exportVariable).toHaveBeenCalledWith('AWS_SECRET_ACCESS_KEY', '');
-        expect(core.exportVariable).toHaveBeenCalledWith('AWS_SESSION_TOKEN', '');
-        expect(core.exportVariable).toHaveBeenCalledWith('AWS_DEFAULT_REGION', '');
-        expect(core.exportVariable).toHaveBeenCalledWith('AWS_REGION', '');
-    });
-
-    test('error is caught and fails the action', async () => {
-        core.exportVariable.mockReset();
-        core.exportVariable.mockImplementation(() => {
-            throw new Error();
-        });
-
-        await cleanup();
-
-        expect(core.setFailed).toBeCalled();
-    });
-});

examples/README.md

@@ -2,8 +2,13 @@
 
 ## [federated-setup](./federated-setup/README.md)
 
-The directory contains templates for setting up the `configure-aws-credentials` federation between your GitHub Organization/repository and your AWS account.
+The directory contains templates for setting up the `configure-aws-credentials`
+federation between your GitHub Organization/repository and your AWS account.
 
 ## [cfn-deploy-example](./cfn-deploy-example/README.md)
 
-Repository example uses aws-action `configure-aws-credentials` with OIDC federation template [github-actions-oidc-federation-and-role](./github-actions-oidc-federation-and-role.yml). Example demonstrates a repository that deploys AWS CloudFormation template using cfn-deploy GitHub Action.
+Repository example uses aws-action `configure-aws-credentials` with OIDC
+federation template
+[github-actions-oidc-federation-and-role](./github-actions-oidc-federation-and-role.yml).
+Example demonstrates a repository that deploys AWS CloudFormation template using
+cfn-deploy GitHub Action.

examples/cfn-deploy-example/.github/workflows/compliance.yml

@@ -6,7 +6,7 @@ jobs:
   sast-guard:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v5
     - uses: grolston/guard-action@main
       with:
         data_directory: './cloudformation/' ## change to your template directory

examples/cfn-deploy-example/.github/workflows/deploy.yml

@@ -18,16 +18,16 @@ jobs:
       contents: read
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v5
     - name: Configure AWS Credentials
-      uses: aws-actions/configure-aws-credentials@v1-node16
+      uses: aws-actions/configure-aws-credentials@v6
       with:
         aws-region: us-east-1
         ## the following creates an ARN based on the values entered into github secrets
         role-to-assume: arn:aws:iam::${{ secrets.AWS_ACCOUNT_ID }}:role/${{ secrets.AWS_DEPLOY_ROLE }}
         role-session-name: myGitHubActions
     - name: Deploy EC2 Bastion
-      uses: aws-actions/aws-cloudformation-github-deploy@v1.0.3
+      uses: aws-actions/aws-cloudformation-github-deploy@v1.3.0
       with:
         name: myEC2bastion
         ## change to path to template in your github repo

examples/cfn-deploy-example/README.md

@@ -1,14 +1,24 @@
 # cfn-deploy example
 
-Example uses aws-action `configure-aws-credentials` with OIDC federation. Prior to using this example project, the user needs to deploy the [github-actions-oidc-federation-and-role](../federated-setup/github-actions-oidc-federation-and-role.yml) template in the AWS account they want to deploy the CloudFormation template into. Specify the GitHub Organization name, repository name, and the specific branch you want to deploy on.
+Example uses aws-action `configure-aws-credentials` with OIDC federation. Prior
+to using this example project, the user needs to deploy the
+[github-actions-oidc-federation-and-role](../federated-setup/github-actions-oidc-federation-and-role.yml)
+template in the AWS account they want to deploy the CloudFormation template
+into. Specify the GitHub Organization name, repository name, and the specific
+branch you want to deploy on.
 
-Within the [github/workflows](./.github/workflows/) directory there is a [compliance.yml](./.github/workflows/compliance.yml) and a [deploy.yml](./.github/workflows/deploy.yml). The deploy.yml file leverages the aws-action `configure-aws-credentials` and accesses GitHub Action Secrets for some of the variables. The compliance.yml runs static application security testing using cfn-guard.
+Within the [github/workflows](./.github/workflows/) directory there is a
+[compliance.yml](./.github/workflows/compliance.yml) and a
+[deploy.yml](./.github/workflows/deploy.yml). The deploy.yml file leverages the
+aws-action `configure-aws-credentials` and accesses GitHub Action Secrets for
+some of the variables. The compliance.yml runs static application security
+testing using cfn-guard.
 
 To use the example you will need to set the following GitHub Action Secrets:
 
-| Secret Key | Used With | Description |
-| --------- | -------- | -----------|
-| AWS_ACCOUNT_ID | configure-aws-credentials | The AWS account ID |
-| AWS_DEPLOY_ROLE | configure-aws-credentials | The name of the IAM role |
-| VPC_ID | aws-cloudformation-github-deploy | VPC ID the EC2 Bastion is deployed to |
-| SUBNET_ID | aws-cloudformation-github-deploy | Subnet ID the EC2 Bastion is deployed to |
+| Secret Key      | Used With                        | Description                              |
+| --------------- | -------------------------------- | ---------------------------------------- |
+| AWS_ACCOUNT_ID  | configure-aws-credentials        | The AWS account ID                       |
+| AWS_DEPLOY_ROLE | configure-aws-credentials        | The name of the IAM role                 |
+| VPC_ID          | aws-cloudformation-github-deploy | VPC ID the EC2 Bastion is deployed to    |
+| SUBNET_ID       | aws-cloudformation-github-deploy | Subnet ID the EC2 Bastion is deployed to |

examples/federated-setup/README.md

@@ -1,9 +1,11 @@
 # federated-setup
 
-## [github-action-oidc-federation](./github-actions-odic-federation.yml)
+## [github-action-oidc-federation](./github-actions-oidc-federation.yml)
 
-Setup of the OIDC federation between your GitHub Organization/repository and your AWS account.
+Setup of the OIDC federation between your GitHub Organization/repository and
+your AWS account.
 
 ## [github-actions-oidc-federation-and-role](./github-actions-oidc-federation-and-role.yml)
 
-Setup of the OIDC federation between your GitHub Organization/repository and your AWS account along with a role that only executes on specific branch.
+Setup of the OIDC federation between your GitHub Organization/repository and
+your AWS account along with a role that only executes on specific branch.

index.js

@@ -1,429 +0,0 @@
-const core = require('@actions/core');
-const aws = require('aws-sdk');
-const assert = require('assert');
-const fs = require('fs');
-const path = require('path');
-const proxy = require('https-proxy-agent');
-
-// Use 1hr as role duration when using session token or OIDC
-// Otherwise, use the max duration of GitHub action (6hr)
-const MAX_ACTION_RUNTIME = 6 * 3600;
-const SESSION_ROLE_DURATION = 3600;
-const DEFAULT_ROLE_DURATION_FOR_OIDC_ROLES = 3600;
-const USER_AGENT = 'configure-aws-credentials-for-github-actions';
-const MAX_TAG_VALUE_LENGTH = 256;
-const SANITIZATION_CHARACTER = '_';
-const ROLE_SESSION_NAME = 'GitHubActions';
-const REGION_REGEX = /^[a-z0-9-]+$/g;
-
-async function assumeRole(params) {
-  // Assume a role to get short-lived credentials using longer-lived credentials.
-  const isDefined = i => !!i;
-
-  const {
-    sourceAccountId,
-    roleToAssume,
-    roleExternalId,
-    roleDurationSeconds,
-    roleSessionName,
-    region,
-    roleSkipSessionTagging,
-    webIdentityTokenFile,
-    webIdentityToken,
-    inlineSessionPolicy,
-    managedSessionPolicies
-  } = params;
-  assert(
-      [roleToAssume, roleDurationSeconds, roleSessionName, region].every(isDefined),
-      "Missing required input when assuming a Role."
-  );
-
-  const {GITHUB_REPOSITORY, GITHUB_WORKFLOW, GITHUB_ACTION, GITHUB_ACTOR, GITHUB_SHA} = process.env;
-  assert(
-      [GITHUB_REPOSITORY, GITHUB_WORKFLOW, GITHUB_ACTION, GITHUB_ACTOR, GITHUB_SHA].every(isDefined),
-      'Missing required environment value. Are you running in GitHub Actions?'
-  );
-
-  const sts = getStsClient(region);
-
-  let roleArn = roleToAssume;
-  if (!roleArn.startsWith('arn:aws')) {
-    // Supports only 'aws' partition. Customers in other partitions ('aws-cn') will need to provide full ARN
-  assert(
-      isDefined(sourceAccountId),
-      "Source Account ID is needed if the Role Name is provided and not the Role Arn."
-  );
-    roleArn = `arn:aws:iam::${sourceAccountId}:role/${roleArn}`;
-  }
-
-  const tagArray = [
-    {Key: 'GitHub', Value: 'Actions'},
-    {Key: 'Repository', Value: GITHUB_REPOSITORY},
-    {Key: 'Workflow', Value: sanitizeGithubWorkflowName(GITHUB_WORKFLOW)},
-    {Key: 'Action', Value: GITHUB_ACTION},
-    {Key: 'Actor', Value: sanitizeGithubActor(GITHUB_ACTOR)},
-    {Key: 'Commit', Value: GITHUB_SHA},
-  ];
-
-  if (isDefined(process.env.GITHUB_REF)) {
-    tagArray.push({Key: 'Branch', Value: process.env.GITHUB_REF});
-  }
-
-  const roleSessionTags = roleSkipSessionTagging ? undefined : tagArray;
-
-  if(roleSessionTags == undefined){
-    core.debug("Role session tagging has been skipped.")
-  } else {
-    core.debug(roleSessionTags.length + " role session tags are being used.")
-  }
-
-  const assumeRoleRequest = {
-    RoleArn: roleArn,
-    RoleSessionName: roleSessionName,
-    DurationSeconds: roleDurationSeconds,
-    Tags: roleSessionTags
-  };
-
-  if (roleExternalId) {
-    assumeRoleRequest.ExternalId = roleExternalId;
-  }
-
-  if (isDefined(inlineSessionPolicy)) {
-    assumeRoleRequest.Policy = inlineSessionPolicy;
-  }
-
-  if (managedSessionPolicies && managedSessionPolicies.length) {
-    const policyArns = []
-    for (const managedSessionPolicy of managedSessionPolicies) {
-      policyArns.push({arn: managedSessionPolicy})
-    }
-    assumeRoleRequest.PolicyArns = policyArns;
-  }
-
-  let assumeFunction = sts.assumeRole.bind(sts);
-
-  // These are customizations needed for the GH OIDC Provider
-  if(isDefined(webIdentityToken)) {
-    delete assumeRoleRequest.Tags;
-
-    assumeRoleRequest.WebIdentityToken = webIdentityToken;
-    assumeFunction = sts.assumeRoleWithWebIdentity.bind(sts);
-  } else if(isDefined(webIdentityTokenFile)) {
-    core.debug("webIdentityTokenFile provided. Will call sts:AssumeRoleWithWebIdentity and take session tags from token contents.");
-    delete assumeRoleRequest.Tags;
-
-    const webIdentityTokenFilePath = path.isAbsolute(webIdentityTokenFile) ?
-      webIdentityTokenFile :
-      path.join(process.env.GITHUB_WORKSPACE, webIdentityTokenFile);
-
-    if (!fs.existsSync(webIdentityTokenFilePath)) {
-      throw new Error(`Web identity token file does not exist: ${webIdentityTokenFilePath}`);
-    }
-
-    try {
-      assumeRoleRequest.WebIdentityToken = await fs.promises.readFile(webIdentityTokenFilePath, 'utf8');
-      assumeFunction = sts.assumeRoleWithWebIdentity.bind(sts);
-    } catch(error) {
-      throw new Error(`Web identity token file could not be read: ${error.message}`);
-    }
-
-  }
-
-  return assumeFunction(assumeRoleRequest)
-    .promise()
-    .then(function (data) {
-      return {
-        accessKeyId: data.Credentials.AccessKeyId,
-        secretAccessKey: data.Credentials.SecretAccessKey,
-        sessionToken: data.Credentials.SessionToken,
-      };
-    });
-}
-
-function sanitizeGithubActor(actor) {
-  // In some circumstances the actor may contain square brackets. For example, if they're a bot ('[bot]')
-  // Square brackets are not allowed in AWS session tags
-  return actor.replace(/\[|\]/g, SANITIZATION_CHARACTER)
-}
-
-function sanitizeGithubWorkflowName(name) {
-  // Workflow names can be almost any valid UTF-8 string, but tags are more restrictive.
-  // This replaces anything not conforming to the tag restrictions by inverting the regular expression.
-  // See the AWS documentation for constraint specifics https://docs.aws.amazon.com/STS/latest/APIReference/API_Tag.html.
-  const nameWithoutSpecialCharacters = name.replace(/[^\p{L}\p{Z}\p{N}_:/=+.-@-]/gu, SANITIZATION_CHARACTER);
-  const nameTruncated = nameWithoutSpecialCharacters.slice(0, MAX_TAG_VALUE_LENGTH)
-  return nameTruncated
-}
-
-function exportCredentials(params){
-  // Configure the AWS CLI and AWS SDKs using environment variables and set them as secrets.
-  // Setting the credentials as secrets masks them in Github Actions logs
-  const {accessKeyId, secretAccessKey, sessionToken} = params;
-
-  // AWS_ACCESS_KEY_ID:
-  // Specifies an AWS access key associated with an IAM user or role
-  core.setSecret(accessKeyId);
-  core.exportVariable('AWS_ACCESS_KEY_ID', accessKeyId);
-
-  // AWS_SECRET_ACCESS_KEY:
-  // Specifies the secret key associated with the access key. This is essentially the "password" for the access key.
-  core.setSecret(secretAccessKey);
-  core.exportVariable('AWS_SECRET_ACCESS_KEY', secretAccessKey);
-
-  // AWS_SESSION_TOKEN:
-  // Specifies the session token value that is required if you are using temporary security credentials.
-  if (sessionToken) {
-    core.setSecret(sessionToken);
-    core.exportVariable('AWS_SESSION_TOKEN', sessionToken);
-  } else if (process.env.AWS_SESSION_TOKEN) {
-    // clear session token from previous credentials action
-    core.exportVariable('AWS_SESSION_TOKEN', '');
-  }
-}
-
-function exportRegion(region) {
-  // AWS_DEFAULT_REGION and AWS_REGION:
-  // Specifies the AWS Region to send requests to
-  core.exportVariable('AWS_DEFAULT_REGION', region);
-  core.exportVariable('AWS_REGION', region);
-}
-
-async function exportAccountId(maskAccountId, region) {
-  // Get the AWS account ID
-  const sts = getStsClient(region);
-  const identity = await sts.getCallerIdentity().promise();
-  const accountId = identity.Account;
-  if (!maskAccountId || maskAccountId.toLowerCase() == 'true') {
-    core.setSecret(accountId);
-  }
-  core.setOutput('aws-account-id', accountId);
-  return accountId;
-}
-
-function loadCredentials() {
-  // Force the SDK to re-resolve credentials with the default provider chain.
-  //
-  // This action typically sets credentials in the environment via environment variables.
-  // The SDK never refreshes those env-var-based credentials after initial load.
-  // In case there were already env-var creds set in the actions environment when this action
-  // loaded, this action needs to refresh the SDK creds after overwriting those environment variables.
-  //
-  // The credentials object needs to be entirely recreated (instead of simply refreshed),
-  // because the credential object type could change when this action writes env var creds.
-  // For example, the first load could return EC2 instance metadata credentials
-  // in a self-hosted runner, and the second load could return environment credentials
-  // from an assume-role call in this action.
-  aws.config.credentials = null;
-
-  return new Promise((resolve, reject) => {
-    aws.config.getCredentials((err) => {
-      if (err) {
-        reject(err);
-      }
-      resolve(aws.config.credentials);
-    })
-  });
-}
-
-async function validateCredentials(expectedAccessKeyId, roleChaining) {
-  let credentials;
-  try {
-    credentials = await loadCredentials();
-
-    if (!credentials.accessKeyId) {
-      throw new Error('Access key ID empty after loading credentials');
-    }
-  } catch (error) {
-    throw new Error(`Credentials could not be loaded, please check your action inputs: ${error.message}`);
-  }
-
-  if (!roleChaining) {
-    const actualAccessKeyId = credentials.accessKeyId;
-
-    if (expectedAccessKeyId && expectedAccessKeyId != actualAccessKeyId) {
-      throw new Error('Unexpected failure: Credentials loaded by the SDK do not match the access key ID configured by the action');
-    }
-  }
-}
-
-function getStsClient(region) {
-  return new aws.STS({
-    region,
-    stsRegionalEndpoints: 'regional',
-    customUserAgent: USER_AGENT
-  });
-}
-
-let defaultSleep = function (ms) {
-  return new Promise((resolve) => setTimeout(resolve, ms));
-};
-let sleep = defaultSleep;
-
-// retryAndBackoff retries with exponential backoff the promise if the error isRetryable upto maxRetries time.
-const retryAndBackoff = async (fn, isRetryable, retries = 0, maxRetries = 12, base = 50) => {
-  try {
-    return await fn();
-  } catch (err) {
-    if (!isRetryable) {
-      throw err;
-    }
-    // It's retryable, so sleep and retry.
-    await sleep(Math.random() * (Math.pow(2, retries) * base) );
-    retries += 1;
-    if (retries === maxRetries) {
-      throw err;
-    }
-    return await retryAndBackoff(fn, isRetryable, retries, maxRetries, base);
-  }
-}
-
-function configureProxy(proxyServer) {
-  const proxyFromEnv = process.env.HTTP_PROXY || process.env.http_proxy;
-
-  if (proxyFromEnv || proxyServer) {
-    let proxyToSet = null;
-
-    if (proxyServer){
-      console.log(`Setting proxy from actions input: ${proxyServer}`);
-      proxyToSet = proxyServer;
-    } else {
-      console.log(`Setting proxy from environment: ${proxyFromEnv}`);
-      proxyToSet = proxyFromEnv;
-    }
-
-    aws.config.update({
-      httpOptions: { agent: proxy(proxyToSet) }
-    });
-  }
-}
-
-async function run() {
-  try {
-    // Get inputs
-    const accessKeyId = core.getInput('aws-access-key-id', { required: false });
-    const audience = core.getInput('audience', { required: false });
-    const secretAccessKey = core.getInput('aws-secret-access-key', { required: false });
-    const region = core.getInput('aws-region', { required: true });
-    const sessionToken = core.getInput('aws-session-token', { required: false });
-    const maskAccountId = core.getInput('mask-aws-account-id', { required: false });
-    const roleToAssume = core.getInput('role-to-assume', {required: false});
-    const roleExternalId = core.getInput('role-external-id', { required: false });
-    const roleChainingInput = core.getInput('role-chaining', { required: false }) || 'false';
-    const roleChaining = roleChainingInput.toLowerCase() === 'true';
-    let roleDurationSeconds = core.getInput('role-duration-seconds', {required: false})
-    || (sessionToken && SESSION_ROLE_DURATION)
-    || (roleChaining && SESSION_ROLE_DURATION)
-    || MAX_ACTION_RUNTIME;
-    const roleSessionName = core.getInput('role-session-name', { required: false }) || ROLE_SESSION_NAME;
-    const roleSkipSessionTaggingInput = core.getInput('role-skip-session-tagging', { required: false }) || 'false';
-    const roleSkipSessionTagging = roleSkipSessionTaggingInput.toLowerCase() === 'true';
-    const webIdentityTokenFile = core.getInput('web-identity-token-file', { required: false });
-    const proxyServer = core.getInput('http-proxy', { required: false });
-    const inlineSessionPolicy = core.getInput('inline-session-policy', { required: false });
-    const managedSessionPolicies = core.getMultilineInput('managed-session-policies', { required: false })
-
-    if (!region.match(REGION_REGEX)) {
-      throw new Error(`Region is not valid: ${region}`);
-    }
-
-    exportRegion(region);
-
-    // This wraps the logic for deciding if we should rely on the GH OIDC provider since we may need to reference
-    // the decision in a few different places. Consolidating it here makes the logic clearer elsewhere.
-    const useGitHubOIDCProvider = () => {
-        // The assumption here is that self-hosted runners won't be populating the `ACTIONS_ID_TOKEN_REQUEST_TOKEN`
-        // environment variable, and they won't be providing a web identity token file or access key either.
-        // V2 of the action might relax this a bit and create an explicit precedence for these so that customers
-        // can provide as much info as they want, and we will follow the established credential loading precedence.
-
-        return roleToAssume && process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN && !accessKeyId && !webIdentityTokenFile && !roleChaining
-    }
-
-    // Always export the source credentials and account ID.
-    // The STS client for calling AssumeRole pulls creds from the environment.
-    // Plus, in the assume role case, if the AssumeRole call fails, we want
-    // the source credentials and account ID to already be masked as secrets
-    // in any error messages.
-    if (accessKeyId) {
-      if (!secretAccessKey) {
-        throw new Error("'aws-secret-access-key' must be provided if 'aws-access-key-id' is provided");
-      }
-
-      exportCredentials({accessKeyId, secretAccessKey, sessionToken});
-    }
-    
-    // Configures proxy
-    configureProxy(proxyServer);
-
-    // Attempt to load credentials from the GitHub OIDC provider.
-    // If a user provides an IAM Role Arn and DOESN'T provide an Access Key Id
-    // The only way to assume the role is via GitHub's OIDC provider.
-    let sourceAccountId;
-    let webIdentityToken;
-    if(useGitHubOIDCProvider()) {
-      webIdentityToken = await core.getIDToken(audience);
-      roleDurationSeconds = core.getInput('role-duration-seconds', {required: false}) || DEFAULT_ROLE_DURATION_FOR_OIDC_ROLES;
-      // We don't validate the credentials here because we don't have them yet when using OIDC.
-    } else {
-      // Regardless of whether any source credentials were provided as inputs,
-      // validate that the SDK can actually pick up credentials.  This validates
-      // cases where this action is on a self-hosted runner that doesn't have credentials
-      // configured correctly, and cases where the user intended to provide input
-      // credentials but the secrets inputs resolved to empty strings.
-      await validateCredentials(accessKeyId, roleChaining);
-
-      sourceAccountId = await exportAccountId(maskAccountId, region);
-    }
-
-    // Get role credentials if configured to do so
-    if (roleToAssume) {
-      const roleCredentials = await retryAndBackoff(
-          async () => { return await assumeRole({
-            sourceAccountId,
-            region,
-            roleToAssume,
-            roleExternalId,
-            roleDurationSeconds,
-            roleSessionName,
-            roleSkipSessionTagging,
-            webIdentityTokenFile,
-            webIdentityToken,
-            inlineSessionPolicy,
-            managedSessionPolicies
-          }) }, true);
-      exportCredentials(roleCredentials);
-      // We need to validate the credentials in 2 of our use-cases
-      // First: self-hosted runners. If the GITHUB_ACTIONS environment variable
-      //  is set to `true` then we are NOT in a self-hosted runner.
-      // Second: Customer provided credentials manually (IAM User keys stored in GH Secrets)
-      if (!process.env.GITHUB_ACTIONS || accessKeyId) {
-        await validateCredentials(roleCredentials.accessKeyId);
-      }
-      await exportAccountId(maskAccountId, region);
-    }
-  }
-  catch (error) {
-    core.setFailed(error.message);
-
-    const showStackTrace = process.env.SHOW_STACK_TRACE;
-
-    if (showStackTrace === 'true') {
-      throw(error)
-    }
-
-  }
-}
-
-exports.withSleep = function (s) {
-  sleep = s;
-};
-exports.reset = function () {
-  sleep = defaultSleep;
-};
-
-exports.run = run
-
-/* istanbul ignore next */
-if (require.main === module) {
-    run();
-}

package.json

@@ -1,38 +1,57 @@
 {
-  "name": "aws-actions-configure-aws-credentials",
-  "version": "2.0.0",
-  "description": "Configure AWS Credentials",
-  "main": "index.js",
+  "name": "configure-aws-credentials",
+  "description": "A GitHub Action to configure AWS credentials",
+  "version": "6.1.0",
   "scripts": {
-    "lint": "eslint **.js",
-    "package": "ncc build index.js -o dist && ncc build cleanup.js -o dist/cleanup",
-    "test": "npm run lint && jest --coverage --verbose"
+    "build": "tsc",
+    "lint": "biome check --error-on-warnings ./src && markdownlint -i node_modules -i CHANGELOG.md '**/*.md'",
+    "lint:fix": "biome check --write ./src && markdownlint -i node_modules -i CHANGELOG.md -f '**/*.md'",
+    "package": "esbuild src/index.ts --bundle --platform=node --target=node24 --outfile=dist/index.js && esbuild src/cleanup/index.ts --bundle --platform=node --target=node24 --outfile=dist/cleanup/index.js && npm run license",
+    "test": "npm run lint && vitest run && npm run build",
+    "clean": "del-cli coverage test-reports node_modules",
+    "license": "generate-license-file --config ./.generatelicensefile.json"
   },
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/aws-actions/configure-aws-credentials.git"
+  "author": {
+    "name": "Amazon.com, Inc. or its affiliates",
+    "url": "https://aws.amazon.com",
+    "organization": true
+  },
+  "devDependencies": {
+    "@aws-sdk/credential-provider-env": "^3.972.24",
+    "@biomejs/biome": "2.4.10",
+    "@smithy/property-provider": "^4.2.11",
+    "@types/node": "^25.5.0",
+    "@vitest/coverage-v8": "^3.2.4",
+    "aws-sdk-client-mock": "^4.1.0",
+    "esbuild": "^0.27.4",
+    "generate-license-file": "^4.1.1",
+    "json-schema": "^0.4.0",
+    "markdownlint-cli": "^0.48.0",
+    "memfs": "^4.57.1",
+    "standard-version": "^9.5.0",
+    "typescript": "^6.0.2",
+    "vitest": "^3.2.4"
+  },
+  "dependencies": {
+    "@actions/core": "^2.0.2",
+    "@aws-sdk/client-sts": "^3.1020.0",
+    "@smithy/node-http-handler": "^4.4.7",
+    "proxy-agent": "^8.0.0"
   },
   "keywords": [
-    "AWS",
-    "GitHub",
-    "Actions",
-    "JavaScript"
+    "aws",
+    "github",
+    "github-action"
   ],
-  "author": "AWS",
+  "engines": {
+    "node": ">= 16.3.0"
+  },
+  "main": "build/index.js",
   "license": "MIT",
+  "homepage": "https://github.com/aws-actions/configure-aws-credentials",
   "bugs": {
     "url": "https://github.com/aws-actions/configure-aws-credentials/issues"
   },
-  "homepage": "https://github.com/aws-actions/configure-aws-credentials#readme",
-  "dependencies": {
-    "@actions/core": "^1.10.0",
-    "aws-sdk": "^2.1396.0",
-    "axios": "^1.4.0",
-    "https-proxy-agent": "^5.0.1"
-  },
-  "devDependencies": {
-    "@vercel/ncc": "^0.36.1",
-    "eslint": "^8.42.0",
-    "jest": "^29.4.3"
-  }
+  "types": "build/index.d.ts",
+  "private": true
 }

release-please-config.json

@@ -0,0 +1,14 @@
+{
+  "packages": {
+    ".": {
+      "changelog-path": "CHANGELOG.md",
+      "release-type": "node",
+      "bump-minor-pre-major": false,
+      "bump-patch-for-minor-pre-major": false,
+      "draft": false,
+      "prerelease": false,
+      "exclude-paths": [".github", "dist"]
+    }
+  },
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json"
+}

src/CredentialsClient.ts

@@ -0,0 +1,107 @@
+import { info } from '@actions/core';
+import { STSClient } from '@aws-sdk/client-sts';
+import type { AwsCredentialIdentity } from '@aws-sdk/types';
+import { NodeHttpHandler } from '@smithy/node-http-handler';
+import { ProxyAgent } from 'proxy-agent';
+import { errorMessage, getCallerIdentity } from './helpers';
+import { ProxyResolver } from './ProxyResolver';
+
+const USER_AGENT = 'configure-aws-credentials-for-github-actions';
+
+export interface CredentialsClientProps {
+  region?: string;
+  proxyServer?: string;
+  noProxy?: string;
+  roleChaining: boolean;
+}
+
+export class CredentialsClient {
+  public region?: string;
+  private _stsClient?: STSClient;
+  private readonly requestHandler?: NodeHttpHandler;
+  private roleChaining?: boolean;
+
+  constructor(props: CredentialsClientProps) {
+    if (props.region !== undefined) {
+      this.region = props.region;
+    }
+    if (props.proxyServer) {
+      info('Configuring proxy handler for STS client');
+      const proxyOptions: { httpProxy: string; httpsProxy: string; noProxy?: string } = {
+        httpProxy: props.proxyServer,
+        httpsProxy: props.proxyServer,
+      };
+      if (props.noProxy !== undefined) {
+        proxyOptions.noProxy = props.noProxy;
+      }
+      const getProxyForUrl = new ProxyResolver(proxyOptions).getProxyForUrl;
+      const handler = new ProxyAgent({ getProxyForUrl });
+      this.requestHandler = new NodeHttpHandler({
+        httpsAgent: handler,
+        httpAgent: handler,
+      });
+    }
+    this.roleChaining = props.roleChaining;
+  }
+
+  public get stsClient(): STSClient {
+    if (!this._stsClient || this.roleChaining) {
+      const config = { customUserAgent: USER_AGENT } as {
+        customUserAgent: string;
+        region?: string;
+        requestHandler?: NodeHttpHandler;
+      };
+      if (this.region !== undefined) config.region = this.region;
+      if (this.requestHandler !== undefined) config.requestHandler = this.requestHandler;
+      this._stsClient = new STSClient(config);
+    }
+    return this._stsClient;
+  }
+
+  public async validateCredentials(
+    expectedAccessKeyId?: string,
+    roleChaining?: boolean,
+    expectedAccountIds?: string[],
+  ) {
+    let credentials: AwsCredentialIdentity;
+    try {
+      credentials = await this.loadCredentials();
+      if (!credentials.accessKeyId) {
+        throw new Error('Access key ID empty after loading credentials');
+      }
+    } catch (error) {
+      throw new Error(`Credentials could not be loaded, please check your action inputs: ${errorMessage(error)}`);
+    }
+    if (expectedAccountIds && expectedAccountIds.length > 0 && expectedAccountIds[0] !== '') {
+      let callerIdentity: Awaited<ReturnType<typeof getCallerIdentity>>;
+      try {
+        callerIdentity = await getCallerIdentity(this.stsClient);
+      } catch (error) {
+        throw new Error(`Could not validate account ID of credentials: ${errorMessage(error)}`);
+      }
+      if (!callerIdentity.Account || !expectedAccountIds.includes(callerIdentity.Account)) {
+        throw new Error(
+          `The account ID of the provided credentials (${
+            callerIdentity.Account ?? 'unknown'
+          }) does not match any of the expected account IDs: ${expectedAccountIds.join(', ')}`,
+        );
+      }
+    }
+
+    if (!roleChaining) {
+      const actualAccessKeyId = credentials.accessKeyId;
+      if (expectedAccessKeyId && expectedAccessKeyId !== actualAccessKeyId) {
+        throw new Error(
+          'Credentials loaded by the SDK do not match the expected access key ID configured by the action',
+        );
+      }
+    }
+  }
+
+  private async loadCredentials() {
+    const config = {} as { requestHandler?: NodeHttpHandler };
+    if (this.requestHandler !== undefined) config.requestHandler = this.requestHandler;
+    const client = new STSClient(config);
+    return client.config.credentials();
+  }
+}

src/ProxyResolver.ts

@@ -0,0 +1,71 @@
+// Based on https://github.com/Rob--W/proxy-from-env/tree/caf8c32301afdac8b5feaf346028bd8240690144
+// See https://github.com/Rob--W/proxy-from-env/blob/caf8c32301afdac8b5feaf346028bd8240690144/LICENSE
+import type * as http from 'node:http';
+
+const DEFAULT_PORTS: Record<string, number> = {
+  http: 80,
+  https: 443,
+};
+export interface ProxyOptions {
+  readonly noProxy?: string;
+  readonly httpsProxy?: string;
+  readonly httpProxy?: string;
+}
+
+export class ProxyResolver {
+  options: ProxyOptions;
+  constructor(options: ProxyOptions) {
+    this.options = options;
+  }
+
+  // This method matches the interface expected by 'proxy-agent'. It is an arrow function to bind 'this'.
+  public readonly getProxyForUrl = (url: string, _req: http.ClientRequest): string => {
+    return this.getProxyForUrlOptions(url, this.options);
+  };
+
+  private getProxyForUrlOptions(url: string | URL, options?: ProxyOptions): string {
+    let parsedUrl: URL;
+    try {
+      parsedUrl = typeof url === 'string' ? new URL(url) : url;
+    } catch (_) {
+      return ''; // Don't proxy invalid URLs.
+    }
+    const proto = parsedUrl.protocol.split(':', 1)[0];
+    if (!proto) return ''; // Don't proxy URLs without a protocol.
+    const hostname = parsedUrl.host;
+    const port = parseInt(parsedUrl.port || '') || DEFAULT_PORTS[proto] || 0;
+
+    if (options?.noProxy && !this.shouldProxy(hostname, port, options.noProxy)) return '';
+    if (proto === 'http' && options?.httpProxy) return options.httpProxy;
+    if (proto === 'https' && options?.httpsProxy) return options.httpsProxy;
+    return ''; // No proxy configured for this protocol or unknown protocol
+  }
+
+  private shouldProxy(hostname: string, port: number, noProxy: string): boolean {
+    if (!noProxy) return true;
+    if (noProxy === '*') return false; // Never proxy if wildcard is set.
+
+    return noProxy.split(/[,\s]/).every((proxy) => {
+      if (!proxy) return true; // Skip zero-length hosts.
+
+      const parsedProxy = proxy.match(/^(.+):(\d+)$/);
+      const parsedProxyHostname = parsedProxy ? parsedProxy[1] : proxy;
+      const parsedProxyPort = parsedProxy?.[2] ? parseInt(parsedProxy[2]) : 0;
+
+      if (parsedProxyPort && parsedProxyPort !== port) return true; // Skip if ports don't match.
+
+      if (parsedProxyHostname && !/^[.*]/.test(parsedProxyHostname)) {
+        // No wildcards, so stop proxying if there is an exact match.
+        return hostname !== parsedProxyHostname;
+      }
+
+      let cleanProxyHostname = parsedProxyHostname;
+      if (parsedProxyHostname && parsedProxyHostname.charAt(0) === '*') {
+        // Remove leading wildcard.
+        cleanProxyHostname = parsedProxyHostname.slice(1);
+      }
+      // Stop proxying if the hostname ends with the no_proxy host.
+      return !cleanProxyHostname || !hostname.endsWith(cleanProxyHostname);
+    });
+  }
+}

src/assumeRole.ts

@@ -0,0 +1,176 @@
+import assert from 'node:assert';
+import fs from 'node:fs';
+import path from 'node:path';
+import * as core from '@actions/core';
+import type { AssumeRoleCommandInput, STSClient, Tag } from '@aws-sdk/client-sts';
+import { AssumeRoleCommand, AssumeRoleWithWebIdentityCommand } from '@aws-sdk/client-sts';
+import type { CredentialsClient } from './CredentialsClient';
+import { errorMessage, isDefined, sanitizeGitHubVariables } from './helpers';
+
+async function assumeRoleWithOIDC(params: AssumeRoleCommandInput, client: STSClient, webIdentityToken: string) {
+  delete params.Tags;
+  delete params.TransitiveTagKeys;
+  core.info('Assuming role with OIDC');
+  try {
+    const creds = await client.send(
+      new AssumeRoleWithWebIdentityCommand({
+        ...params,
+        WebIdentityToken: webIdentityToken,
+      }),
+    );
+    return creds;
+  } catch (error) {
+    throw new Error(`Could not assume role with OIDC: ${errorMessage(error)}`);
+  }
+}
+
+async function assumeRoleWithWebIdentityTokenFile(
+  params: AssumeRoleCommandInput,
+  client: STSClient,
+  webIdentityTokenFile: string,
+  workspace: string,
+) {
+  core.debug(
+    'webIdentityTokenFile provided. Will call sts:AssumeRoleWithWebIdentity and take session tags from token contents.',
+  );
+  const webIdentityTokenFilePath = path.isAbsolute(webIdentityTokenFile)
+    ? webIdentityTokenFile
+    : path.join(workspace, webIdentityTokenFile);
+  if (!fs.existsSync(webIdentityTokenFilePath)) {
+    throw new Error(`Web identity token file does not exist: ${webIdentityTokenFilePath}`);
+  }
+  core.info('Assuming role with web identity token file');
+  try {
+    const webIdentityToken = fs.readFileSync(webIdentityTokenFilePath, 'utf8');
+    delete params.Tags;
+    const creds = await client.send(
+      new AssumeRoleWithWebIdentityCommand({
+        ...params,
+        WebIdentityToken: webIdentityToken,
+      }),
+    );
+    return creds;
+  } catch (error) {
+    throw new Error(`Could not assume role with web identity token file: ${errorMessage(error)}`);
+  }
+}
+
+async function assumeRoleWithCredentials(params: AssumeRoleCommandInput, client: STSClient) {
+  core.info('Assuming role with user credentials');
+  try {
+    const creds = await client.send(new AssumeRoleCommand({ ...params }));
+    return creds;
+  } catch (error) {
+    throw new Error(`Could not assume role with user credentials: ${errorMessage(error)}`);
+  }
+}
+
+export interface assumeRoleParams {
+  credentialsClient: CredentialsClient;
+  roleToAssume: string;
+  roleDuration: number;
+  roleSessionName: string;
+  roleSkipSessionTagging?: boolean;
+  transitiveTagKeys?: string[];
+  sourceAccountId?: string;
+  roleExternalId?: string;
+  webIdentityTokenFile?: string;
+  webIdentityToken?: string;
+  inlineSessionPolicy?: string;
+  managedSessionPolicies?: { arn: string }[];
+}
+
+export async function assumeRole(params: assumeRoleParams) {
+  const {
+    credentialsClient,
+    sourceAccountId,
+    roleToAssume,
+    roleExternalId,
+    roleDuration,
+    roleSessionName,
+    roleSkipSessionTagging,
+    transitiveTagKeys,
+    webIdentityTokenFile,
+    webIdentityToken,
+    inlineSessionPolicy,
+    managedSessionPolicies,
+  } = { ...params };
+
+  // Load GitHub environment variables
+  const { GITHUB_REPOSITORY, GITHUB_WORKFLOW, GITHUB_ACTION, GITHUB_ACTOR, GITHUB_SHA, GITHUB_WORKSPACE } = process.env;
+  if (!GITHUB_REPOSITORY || !GITHUB_WORKFLOW || !GITHUB_ACTION || !GITHUB_ACTOR || !GITHUB_SHA || !GITHUB_WORKSPACE) {
+    throw new Error('Missing required environment variables. Are you running in GitHub Actions?');
+  }
+
+  // Load role session tags
+  const tagArray: Tag[] = [
+    { Key: 'GitHub', Value: 'Actions' },
+    { Key: 'Repository', Value: GITHUB_REPOSITORY },
+    { Key: 'Workflow', Value: sanitizeGitHubVariables(GITHUB_WORKFLOW) },
+    { Key: 'Action', Value: GITHUB_ACTION },
+    { Key: 'Actor', Value: sanitizeGitHubVariables(GITHUB_ACTOR) },
+    { Key: 'Commit', Value: GITHUB_SHA },
+  ];
+  if (process.env.GITHUB_REF) {
+    tagArray.push({
+      Key: 'Branch',
+      Value: sanitizeGitHubVariables(process.env.GITHUB_REF),
+    });
+  }
+  const tags = roleSkipSessionTagging ? undefined : tagArray;
+  if (!tags) {
+    core.debug('Role session tagging has been skipped.');
+  } else {
+    core.debug(`${tags.length} role session tags are being used.`);
+  }
+
+  //only populate transitiveTagKeys array if user is actually using session tagging
+  const transitiveTagKeysArray = roleSkipSessionTagging
+    ? undefined
+    : transitiveTagKeys?.filter((key) => tags?.some((tag) => tag.Key === key));
+
+  // Calculate role ARN from name and account ID (currently only supports `aws` partition)
+  let roleArn = roleToAssume;
+  if (!roleArn.startsWith('arn:aws')) {
+    assert(
+      isDefined(sourceAccountId),
+      'Source Account ID is needed if the Role Name is provided and not the Role Arn.',
+    );
+    roleArn = `arn:aws:iam::${sourceAccountId}:role/${roleArn}`;
+  }
+
+  // Ready common parameters to assume role
+  const commonAssumeRoleParams: AssumeRoleCommandInput = {
+    RoleArn: roleArn,
+    RoleSessionName: roleSessionName,
+    DurationSeconds: roleDuration,
+    Tags: tags ? tags : undefined,
+    TransitiveTagKeys: transitiveTagKeysArray ? transitiveTagKeysArray : undefined,
+    ExternalId: roleExternalId ? roleExternalId : undefined,
+    Policy: inlineSessionPolicy ? inlineSessionPolicy : undefined,
+    PolicyArns: managedSessionPolicies?.length ? managedSessionPolicies : undefined,
+  };
+  const keys = Object.keys(commonAssumeRoleParams) as Array<keyof typeof commonAssumeRoleParams>;
+  keys.forEach((k) => {
+    if (commonAssumeRoleParams[k] === undefined) {
+      delete commonAssumeRoleParams[k];
+    }
+  });
+
+  // Instantiate STS client
+  const stsClient = credentialsClient.stsClient;
+
+  // Assume role using one of three methods
+  if (!!webIdentityToken) {
+    return assumeRoleWithOIDC(commonAssumeRoleParams, stsClient, webIdentityToken);
+  }
+  if (!!webIdentityTokenFile) {
+    return assumeRoleWithWebIdentityTokenFile(
+      commonAssumeRoleParams,
+      stsClient,
+      webIdentityTokenFile,
+      GITHUB_WORKSPACE,
+    );
+  }
+  return assumeRoleWithCredentials(commonAssumeRoleParams, stsClient);
+}

src/cleanup/index.ts

@@ -0,0 +1,45 @@
+import * as core from '@actions/core';
+import { errorMessage, getBooleanInput } from '../helpers';
+
+/**
+ * When the GitHub Actions job is done, clean up any environment variables that
+ * may have been set by the configure-aws-credentials steps in the job.
+ *
+ * Environment variables are not intended to be shared across different jobs in
+ * the same GitHub Actions workflow: GitHub Actions documentation states that
+ * each job runs in a fresh instance.  However, doing our own cleanup will
+ * give us additional assurance that these environment variables are not shared
+ * with any other jobs.
+ */
+
+export function cleanup() {
+  // Only attempt to change environment variables if we changed them in the first place
+  const awsProfile = core.getInput('aws-profile', { required: false });
+  if (getBooleanInput('output-env-credentials', { required: false, default: !awsProfile })) {
+    try {
+      // The GitHub Actions toolkit does not have an option to completely unset
+      // environment variables, so we overwrite the current value with an empty
+      // string. The AWS CLI and AWS SDKs will behave correctly: they treat an
+      // empty string value as if the environment variable does not exist.
+      core.exportVariable('AWS_ACCESS_KEY_ID', '');
+      core.exportVariable('AWS_SECRET_ACCESS_KEY', '');
+      core.exportVariable('AWS_SESSION_TOKEN', '');
+      core.exportVariable('AWS_DEFAULT_REGION', '');
+      core.exportVariable('AWS_REGION', '');
+      if (core.getInput('aws-profile')) {
+        core.exportVariable('AWS_PROFILE', '');
+      }
+    } catch (error) {
+      core.setFailed(errorMessage(error));
+    }
+  }
+}
+
+/* c8 ignore start */
+if (require.main === module) {
+  try {
+    cleanup();
+  } catch (error) {
+    core.setFailed(errorMessage(error));
+  }
+}

src/helpers.ts

@@ -0,0 +1,270 @@
+import * as core from '@actions/core';
+import type { Credentials, STSClient } from '@aws-sdk/client-sts';
+import { GetCallerIdentityCommand } from '@aws-sdk/client-sts';
+import type { CredentialsClient } from './CredentialsClient';
+
+const MAX_TAG_VALUE_LENGTH = 256;
+const SANITIZATION_CHARACTER = '_';
+const SPECIAL_CHARS_REGEX = /[!@#$%^&*()_+\-=[\]{};':"\\|,.<>/?]+/;
+
+export function translateEnvVariables() {
+  const envVars = [
+    'AWS_REGION',
+    'ROLE_TO_ASSUME',
+    'WEB_IDENTITY_TOKEN_FILE',
+    'ROLE_CHAINING',
+    'AUDIENCE',
+    'HTTP_PROXY',
+    'MASK_AWS_ACCOUNT_ID',
+    'ROLE_DURATION_SECONDS',
+    'ROLE_EXTERNAL_ID',
+    'ROLE_SESSION_NAME',
+    'ROLE_SKIP_SESSION_TAGGING',
+    'TRANSITIVE_TAG_KEYS',
+    'INLINE_SESSION_POLICY',
+    'MANAGED_SESSION_POLICIES',
+    'OUTPUT_CREDENTIALS',
+    'UNSET_CURRENT_CREDENTIALS',
+    'DISABLE_RETRY',
+    'RETRY_MAX_ATTEMPTS',
+    'SPECIAL_CHARACTERS_WORKAROUND',
+    'USE_EXISTING_CREDENTIALS',
+    'NO_PROXY',
+    'OVERWRITE_AWS_PROFILE',
+  ];
+  // Treat HTTPS_PROXY as HTTP_PROXY. Precedence is HTTPS_PROXY > HTTP_PROXY
+  if (process.env.HTTPS_PROXY) process.env.HTTP_PROXY = process.env.HTTPS_PROXY;
+
+  for (const envVar of envVars) {
+    if (process.env[envVar]) {
+      const inputKey = `INPUT_${envVar.replace(/_/g, '-')}`;
+      process.env[inputKey] = process.env[inputKey] || process.env[envVar];
+    }
+  }
+}
+
+// Configure the AWS CLI and AWS SDKs using environment variables and set them as secrets.
+// Setting the credentials as secrets masks them in Github Actions logs
+export function exportCredentials(
+  creds?: Partial<Credentials>,
+  outputCredentials?: boolean,
+  outputEnvCredentials?: boolean,
+) {
+  if (creds?.AccessKeyId) {
+    core.setSecret(creds.AccessKeyId);
+  }
+
+  if (creds?.SecretAccessKey) {
+    core.setSecret(creds.SecretAccessKey);
+  }
+
+  if (creds?.SessionToken) {
+    core.setSecret(creds.SessionToken);
+  }
+
+  if (outputEnvCredentials) {
+    if (creds?.AccessKeyId) {
+      core.exportVariable('AWS_ACCESS_KEY_ID', creds.AccessKeyId);
+    }
+
+    if (creds?.SecretAccessKey) {
+      core.exportVariable('AWS_SECRET_ACCESS_KEY', creds.SecretAccessKey);
+    }
+
+    if (creds?.SessionToken) {
+      core.exportVariable('AWS_SESSION_TOKEN', creds.SessionToken);
+    } else if (process.env.AWS_SESSION_TOKEN) {
+      // clear session token from previous credentials action
+      core.exportVariable('AWS_SESSION_TOKEN', '');
+    }
+  }
+
+  if (outputCredentials) {
+    if (creds?.AccessKeyId) {
+      core.setOutput('aws-access-key-id', creds.AccessKeyId);
+    }
+    if (creds?.SecretAccessKey) {
+      core.setOutput('aws-secret-access-key', creds.SecretAccessKey);
+    }
+    if (creds?.SessionToken) {
+      core.setOutput('aws-session-token', creds.SessionToken);
+    }
+    if (creds?.Expiration) {
+      core.setOutput('aws-expiration', creds.Expiration);
+    }
+  }
+}
+
+export function unsetCredentials(outputEnvCredentials?: boolean) {
+  if (outputEnvCredentials) {
+    core.exportVariable('AWS_ACCESS_KEY_ID', '');
+    core.exportVariable('AWS_SECRET_ACCESS_KEY', '');
+    core.exportVariable('AWS_SESSION_TOKEN', '');
+    core.exportVariable('AWS_REGION', '');
+    core.exportVariable('AWS_DEFAULT_REGION', '');
+  }
+}
+
+export function exportRegion(region: string, outputEnvCredentials?: boolean) {
+  if (outputEnvCredentials) {
+    core.exportVariable('AWS_DEFAULT_REGION', region);
+    core.exportVariable('AWS_REGION', region);
+  }
+}
+
+export async function getCallerIdentity(client: STSClient): Promise<{ Account: string; Arn: string; UserId?: string }> {
+  const identity = await client.send(new GetCallerIdentityCommand({}));
+  if (!identity.Account || !identity.Arn) {
+    throw new Error('Could not get Account ID or ARN from STS. Did you set credentials?');
+  }
+  const result: { Account: string; Arn: string; UserId?: string } = {
+    Account: identity.Account,
+    Arn: identity.Arn,
+  };
+  if (identity.UserId !== undefined) {
+    result.UserId = identity.UserId;
+  }
+  return result;
+}
+
+// Obtains account ID from STS Client and sets it as output
+export async function exportAccountId(credentialsClient: CredentialsClient, maskAccountId?: boolean) {
+  const identity = await getCallerIdentity(credentialsClient.stsClient);
+  const accountId = identity.Account;
+  const arn = identity.Arn;
+  if (maskAccountId) {
+    core.setSecret(accountId);
+    core.setSecret(arn);
+  }
+  core.setOutput('aws-account-id', accountId);
+  core.setOutput('authenticated-arn', arn);
+  return accountId;
+}
+
+// Tags have a more restrictive set of acceptable characters than GitHub environment variables can.
+// This replaces anything not conforming to the tag restrictions by inverting the regular expression.
+// See the AWS documentation for constraint specifics https://docs.aws.amazon.com/STS/latest/APIReference/API_Tag.html.
+export function sanitizeGitHubVariables(name: string) {
+  const nameWithoutSpecialCharacters = name.replace(/[^\p{L}\p{Z}\p{N}_.:/=+\-@]/gu, SANITIZATION_CHARACTER);
+  const nameTruncated = nameWithoutSpecialCharacters.slice(0, MAX_TAG_VALUE_LENGTH);
+  return nameTruncated;
+}
+
+export async function defaultSleep(ms: number) {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+}
+let sleep = defaultSleep;
+
+export function withsleep(s: typeof sleep) {
+  sleep = s;
+}
+
+export function reset() {
+  sleep = defaultSleep;
+}
+
+export function verifyKeys(creds: Partial<Credentials> | undefined) {
+  if (!creds) {
+    return false;
+  }
+  if (creds.AccessKeyId) {
+    if (SPECIAL_CHARS_REGEX.test(creds.AccessKeyId)) {
+      core.debug('AccessKeyId contains special characters.');
+      return false;
+    }
+  }
+  if (creds.SecretAccessKey) {
+    if (SPECIAL_CHARS_REGEX.test(creds.SecretAccessKey)) {
+      core.debug('SecretAccessKey contains special characters.');
+      return false;
+    }
+  }
+  return true;
+}
+
+// Retries the promise with exponential backoff if the error isRetryable up to maxRetries time.
+export async function retryAndBackoff<T>(
+  fn: () => Promise<T>,
+  isRetryable: boolean,
+  maxRetries = 12,
+  retries = 0,
+  base = 50,
+): Promise<T> {
+  try {
+    return await fn();
+  } catch (err) {
+    if (!isRetryable) {
+      core.debug(`retryAndBackoff: error is not retryable: ${errorMessage(err)}`);
+      throw err;
+    }
+    // It's retryable, so sleep and retry.
+    const delay = Math.random() * (2 ** retries * base);
+    const nextRetry = retries + 1;
+
+    core.debug(
+      `retryAndBackoff: attempt ${nextRetry} of ${maxRetries} failed: ${errorMessage(err)}. ` +
+        `Retrying after ${Math.floor(delay)}ms.`,
+    );
+
+    await sleep(delay);
+
+    if (nextRetry >= maxRetries) {
+      core.debug('retryAndBackoff: reached max retries; giving up.');
+      throw err;
+    }
+
+    return await retryAndBackoff(fn, isRetryable, maxRetries, nextRetry, base);
+  }
+}
+
+/* c8 ignore start */
+export function errorMessage(error: unknown) {
+  return error instanceof Error ? error.message : String(error);
+}
+
+export function isDefined<T>(i: T | undefined | null): i is T {
+  return i !== undefined && i !== null;
+}
+/* c8 ignore stop */
+
+export async function areCredentialsValid(credentialsClient: CredentialsClient) {
+  const client = credentialsClient.stsClient;
+  try {
+    const identity = await client.send(new GetCallerIdentityCommand({}));
+    if (identity.Account) {
+      return true;
+    }
+    return false;
+  } catch (_) {
+    return false;
+  }
+}
+
+/**
+ * Like core.getBooleanInput, but respects the required option.
+ *
+ * From https://github.com/actions/toolkit/blob/6876e2a664ec02908178087905b9155e9892a437/packages/core/src/core.ts
+ *
+ * Gets the input value of the boolean type in the YAML 1.2 "core schema" specification.
+ * Support boolean input list: `true | True | TRUE | false | False | FALSE` .
+ * The return value is also in boolean type.
+ * ref: https://yaml.org/spec/1.2/spec.html#id2804923
+ *
+ * @param     name     name of the input to get
+ * @param     options  optional. See core.InputOptions. Also supports optional 'default' if the input is not set
+ * @returns   boolean
+ */
+export function getBooleanInput(name: string, options?: core.InputOptions & { default?: boolean }): boolean {
+  const trueValue = ['true', 'True', 'TRUE'];
+  const falseValue = ['false', 'False', 'FALSE'];
+  const optionsWithoutDefault = { ...options };
+  delete optionsWithoutDefault.default;
+  const val = core.getInput(name, optionsWithoutDefault);
+  if (trueValue.includes(val)) return true;
+  if (falseValue.includes(val)) return false;
+  if (val === '') return options?.default ?? false;
+  throw new TypeError(
+    `Input does not meet YAML 1.2 "Core Schema" specification: ${name}\n` +
+      `Support boolean input list: \`true | True | TRUE | false | False | FALSE\``,
+  );
+}

src/index.ts

@@ -0,0 +1,290 @@
+import * as core from '@actions/core';
+import type { AssumeRoleCommandOutput } from '@aws-sdk/client-sts';
+import { assumeRole } from './assumeRole';
+import { CredentialsClient } from './CredentialsClient';
+import {
+  areCredentialsValid,
+  errorMessage,
+  exportAccountId,
+  exportCredentials,
+  exportRegion,
+  getBooleanInput,
+  retryAndBackoff,
+  translateEnvVariables,
+  unsetCredentials,
+  verifyKeys,
+} from './helpers';
+import { writeProfileFiles } from './profileManager';
+
+const DEFAULT_ROLE_DURATION = 3600; // One hour (seconds)
+const ROLE_SESSION_NAME = 'GitHubActions';
+const REGION_REGEX = /^[a-z0-9-]+$/g;
+
+export async function run() {
+  try {
+    translateEnvVariables();
+    // Get inputs
+    // Undefined inputs are empty strings ( or empty arrays)
+    const AccessKeyId = core.getInput('aws-access-key-id', { required: false });
+    const SecretAccessKey = core.getInput('aws-secret-access-key', { required: false });
+    const sessionTokenInput = core.getInput('aws-session-token', { required: false });
+    const SessionToken = sessionTokenInput === '' ? undefined : sessionTokenInput;
+    const region = core.getInput('aws-region', { required: true });
+    const awsProfile = core.getInput('aws-profile', { required: false });
+    const overwriteAwsProfile = getBooleanInput('overwrite-aws-profile', { required: false });
+    const roleToAssume = core.getInput('role-to-assume', { required: false });
+    const audience = core.getInput('audience', { required: false });
+    const maskAccountId = getBooleanInput('mask-aws-account-id', { required: false });
+    const roleExternalId = core.getInput('role-external-id', { required: false });
+    const webIdentityTokenFile = core.getInput('web-identity-token-file', { required: false });
+    const roleDuration =
+      Number.parseInt(core.getInput('role-duration-seconds', { required: false })) || DEFAULT_ROLE_DURATION;
+    const roleSessionName = core.getInput('role-session-name', { required: false }) || ROLE_SESSION_NAME;
+    const roleSkipSessionTagging = getBooleanInput('role-skip-session-tagging', { required: false });
+    const transitiveTagKeys = core.getMultilineInput('transitive-tag-keys', { required: false });
+    const proxyServer = core.getInput('http-proxy', { required: false }) || process.env.HTTP_PROXY;
+    const inlineSessionPolicy = core.getInput('inline-session-policy', { required: false });
+    const managedSessionPolicies = core.getMultilineInput('managed-session-policies', { required: false }).map((p) => {
+      return { arn: p };
+    });
+    const roleChaining = getBooleanInput('role-chaining', { required: false });
+    const outputCredentials = getBooleanInput('output-credentials', { required: false });
+    // Default to always outputting environment credentials unless profile is specified. If profile is specified, default to
+    // no environment credentials (but still output them if the user specifically requests it).
+    const outputEnvCredentials = getBooleanInput('output-env-credentials', { required: false, default: !awsProfile });
+    const unsetCurrentCredentials = getBooleanInput('unset-current-credentials', { required: false });
+    let disableRetry = getBooleanInput('disable-retry', { required: false });
+    const specialCharacterWorkaround = getBooleanInput('special-characters-workaround', { required: false });
+    const useExistingCredentials = core.getInput('use-existing-credentials', { required: false });
+    let maxRetries = Number.parseInt(core.getInput('retry-max-attempts', { required: false })) || 12;
+    const expectedAccountIds = core
+      .getInput('allowed-account-ids', { required: false })
+      .split(',')
+      .map((s) => s.trim());
+    const forceSkipOidc = getBooleanInput('force-skip-oidc', { required: false });
+    const noProxy = core.getInput('no-proxy', { required: false });
+    const globalTimeout = Number.parseInt(core.getInput('action-timeout-s', { required: false })) || 0;
+
+    let timeoutId: NodeJS.Timeout | undefined;
+    if (globalTimeout > 0) {
+      core.info(`Setting a global timeout of ${globalTimeout} seconds for the action`);
+      timeoutId = setTimeout(() => {
+        core.setFailed(`Action timed out after ${globalTimeout} seconds`);
+        process.exit(1);
+      }, globalTimeout * 1000);
+    }
+
+    if (forceSkipOidc && roleToAssume && !AccessKeyId && !webIdentityTokenFile) {
+      throw new Error(
+        "If 'force-skip-oidc' is true and 'role-to-assume' is set, 'aws-access-key-id' or 'web-identity-token-file' must be set",
+      );
+    }
+
+    if (specialCharacterWorkaround) {
+      // 😳
+      disableRetry = false;
+      maxRetries = 12;
+    } else if (maxRetries < 1) {
+      maxRetries = 1;
+    }
+
+    // Logic to decide whether to attempt to use OIDC or not
+    const useGitHubOIDCProvider = () => {
+      if (forceSkipOidc) return false;
+      // The `ACTIONS_ID_TOKEN_REQUEST_TOKEN` environment variable is set when the `id-token` permission is granted.
+      // This is necessary to authenticate with OIDC, but not strictly set just for OIDC. If it is not set and all other
+      // checks pass, it is likely but not guaranteed that the user needs but lacks this permission in their workflow.
+      // So, we will log a warning when it is the only piece absent
+      if (
+        !!roleToAssume &&
+        !webIdentityTokenFile &&
+        !AccessKeyId &&
+        !process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN &&
+        !roleChaining
+      ) {
+        core.info(
+          'It looks like you might be trying to authenticate with OIDC. Did you mean to set the `id-token` permission? ' +
+            'If you are not trying to authenticate with OIDC and the action is working successfully, you can ignore this message.',
+        );
+      }
+      return (
+        !!roleToAssume &&
+        !!process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN &&
+        !AccessKeyId &&
+        !webIdentityTokenFile &&
+        !roleChaining
+      );
+    };
+
+    if (unsetCurrentCredentials) {
+      unsetCredentials(outputEnvCredentials);
+    }
+
+    if (!region.match(REGION_REGEX)) {
+      throw new Error(`Region is not valid: ${region}`);
+    }
+
+    exportRegion(region, outputEnvCredentials);
+
+    // Instantiate credentials client
+    const clientProps: { region: string; proxyServer?: string; noProxy?: string; roleChaining: boolean } = {
+      region,
+      roleChaining,
+    };
+    if (proxyServer) clientProps.proxyServer = proxyServer;
+    if (noProxy) clientProps.noProxy = noProxy;
+    const credentialsClient = new CredentialsClient(clientProps);
+    let sourceAccountId: string;
+    let webIdentityToken: string;
+
+    //if the user wants to attempt to use existing credentials, check if we have some already
+    if (useExistingCredentials) {
+      const validCredentials = await areCredentialsValid(credentialsClient);
+      if (validCredentials) {
+        core.notice('Pre-existing credentials are valid. No need to generate new ones.');
+        if (timeoutId) clearTimeout(timeoutId);
+        return;
+      }
+      core.notice('No valid credentials exist. Running as normal.');
+    }
+
+    // If OIDC is being used, generate token
+    // Else, export credentials provided as input
+    if (useGitHubOIDCProvider()) {
+      try {
+        webIdentityToken = await retryAndBackoff(
+          async () => {
+            return core.getIDToken(audience);
+          },
+          !disableRetry,
+          maxRetries,
+        );
+      } catch (error) {
+        throw new Error(`getIDToken call failed: ${errorMessage(error)}`);
+      }
+    } else if (AccessKeyId) {
+      if (!SecretAccessKey) {
+        throw new Error("'aws-secret-access-key' must be provided if 'aws-access-key-id' is provided");
+      }
+      // The STS client for calling AssumeRole pulls creds from the environment.
+      // Plus, in the assume role case, if the AssumeRole call fails, we want
+      // the source credentials to already be masked as secrets
+      // in any error messages.
+      exportCredentials({ AccessKeyId, SecretAccessKey, SessionToken }, outputCredentials, outputEnvCredentials);
+
+      // If using IAM User Credentials, write to profile now so that the assumeRole call can succeed (and also for
+      // credential validation before role assumption).
+      if (awsProfile) {
+        writeProfileFiles(awsProfile, { AccessKeyId, SecretAccessKey, SessionToken }, region, overwriteAwsProfile);
+      }
+    } else if (!webIdentityTokenFile && !roleChaining) {
+      // Proceed only if credentials can be picked up
+      await credentialsClient.validateCredentials(undefined, roleChaining, expectedAccountIds);
+      sourceAccountId = await exportAccountId(credentialsClient, maskAccountId);
+    }
+
+    if (AccessKeyId || roleChaining) {
+      // Validate that the SDK can actually pick up credentials.
+      // This validates cases where this action is using existing environment credentials,
+      // and cases where the user intended to provide input credentials but the secrets inputs resolved to empty strings.
+      await credentialsClient.validateCredentials(AccessKeyId, roleChaining, expectedAccountIds);
+      sourceAccountId = await exportAccountId(credentialsClient, maskAccountId);
+    }
+    // Get role credentials if configured to do so
+    if (roleToAssume) {
+      let roleCredentials: AssumeRoleCommandOutput;
+      do {
+        roleCredentials = await retryAndBackoff(
+          async () => {
+            return assumeRole({
+              credentialsClient,
+              sourceAccountId,
+              roleToAssume,
+              roleExternalId,
+              roleDuration,
+              roleSessionName,
+              roleSkipSessionTagging,
+              transitiveTagKeys,
+              webIdentityTokenFile,
+              webIdentityToken,
+              inlineSessionPolicy,
+              managedSessionPolicies,
+            });
+          },
+          !disableRetry,
+          maxRetries,
+        );
+      } while (specialCharacterWorkaround && !verifyKeys(roleCredentials.Credentials));
+      core.info(`Authenticated as assumedRoleId ${roleCredentials.AssumedRoleUser?.AssumedRoleId}`);
+      exportCredentials(roleCredentials.Credentials, outputCredentials, outputEnvCredentials);
+      // We need to validate the credentials in 2 of our use-cases
+      // First: self-hosted runners. If the GITHUB_ACTIONS environment variable
+      //  is set to `true` then we are NOT in a self-hosted runner.
+      // Second: Customer provided credentials manually (IAM User keys stored in GH Secrets)
+      // If we are using a profile, don't validate credentials yet (since they most likely won't be in the environment).
+      // Wait until after creds are written to the profile file to try validation.
+      if ((!process.env.GITHUB_ACTIONS || AccessKeyId) && !awsProfile) {
+        await credentialsClient.validateCredentials(
+          roleCredentials.Credentials?.AccessKeyId,
+          roleChaining,
+          expectedAccountIds,
+        );
+      }
+      if (outputEnvCredentials) {
+        await exportAccountId(credentialsClient, maskAccountId);
+      }
+
+      // Write profile files if profile mode is enabled
+      if (awsProfile) {
+        if (!roleCredentials.Credentials) {
+          throw new Error('AssumeRole call succeeded but returned no credentials');
+        }
+        // If user provided IAM User Credentials and then we assumed a role, overwrite the profile file to add
+        // the session token. (this only overwrites the profile within a single run of the action).
+        // We then validate the credentials to make sure they work.
+        if (AccessKeyId || !process.env.GITHUB_ACTIONS) {
+          writeProfileFiles(awsProfile, roleCredentials.Credentials, region, true);
+          await credentialsClient.validateCredentials(
+            roleCredentials.Credentials.AccessKeyId,
+            roleChaining,
+            expectedAccountIds,
+          );
+        } else {
+          writeProfileFiles(awsProfile, roleCredentials.Credentials, region, overwriteAwsProfile);
+        }
+
+        if (outputEnvCredentials) {
+          core.exportVariable('AWS_PROFILE', awsProfile);
+        }
+      }
+    } else {
+      core.info('Proceeding with IAM user credentials');
+
+      if (awsProfile) {
+        if (outputEnvCredentials) {
+          core.exportVariable('AWS_PROFILE', awsProfile);
+        }
+      }
+    }
+
+    // Clear timeout on successful completion
+    if (timeoutId) clearTimeout(timeoutId);
+  } catch (error) {
+    core.setFailed(errorMessage(error));
+
+    const showStackTrace = process.env.SHOW_STACK_TRACE;
+    if (showStackTrace === 'true') {
+      throw error;
+    }
+  }
+}
+
+/* c8 ignore start */
+/* istanbul ignore next */
+if (require.main === module) {
+  (async () => {
+    await run();
+  })().catch((error) => {
+    core.setFailed(errorMessage(error));
+  });
+}

src/profileManager.ts

@@ -0,0 +1,214 @@
+import * as fs from 'node:fs';
+import * as os from 'node:os';
+import * as path from 'node:path';
+import * as core from '@actions/core';
+import type { Credentials } from '@aws-sdk/client-sts';
+
+/**
+ * Parse an INI-format string into a nested object.
+ * Preserves literal section names (e.g. "profile dev" stays as-is).
+ */
+export function parseIni(iniData: string): Record<string, Record<string, string>> {
+  const result: Record<string, Record<string, string>> = {};
+  let currentSection: string | undefined;
+
+  for (const line of iniData.split(/\r?\n/)) {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith(';') || trimmed.startsWith('#')) {
+      continue;
+    }
+
+    const sectionMatch = trimmed.match(/^\[([^\]]*)\]$/);
+    if (sectionMatch) {
+      currentSection = sectionMatch[1] as string;
+      if (currentSection === '__proto__') {
+        currentSection = undefined;
+        continue;
+      }
+      result[currentSection] = result[currentSection] || {};
+      continue;
+    }
+
+    if (currentSection) {
+      const eqIndex = trimmed.indexOf('=');
+      if (eqIndex > 0) {
+        const key = trimmed.substring(0, eqIndex).trim();
+        const value = trimmed.substring(eqIndex + 1).trim();
+        if (key !== '__proto__') {
+          const section = result[currentSection];
+          if (section) {
+            section[key] = value;
+          }
+        }
+      }
+    }
+  }
+
+  return result;
+}
+
+/**
+ * Serialize a nested object into INI-format string.
+ */
+export function stringifyIni(data: Record<string, Record<string, string>>): string {
+  const sections: string[] = [];
+  for (const [sectionName, sectionData] of Object.entries(data)) {
+    const lines: string[] = [`[${sectionName}]`];
+    for (const [key, value] of Object.entries(sectionData)) {
+      lines.push(`${key} = ${value}`);
+    }
+    sections.push(lines.join('\n'));
+  }
+  return `${sections.join('\n\n')}\n`;
+}
+
+interface ProfileFilePaths {
+  credentials: string;
+  config: string;
+}
+
+/**
+ * Get the file paths for AWS credentials and config files
+ * Respects AWS_SHARED_CREDENTIALS_FILE and AWS_CONFIG_FILE environment variables
+ */
+export function getProfileFilePaths(): ProfileFilePaths {
+  const credentialsPath = process.env.AWS_SHARED_CREDENTIALS_FILE || path.join(os.homedir(), '.aws', 'credentials');
+  const configPath = process.env.AWS_CONFIG_FILE || path.join(os.homedir(), '.aws', 'config');
+
+  return {
+    credentials: credentialsPath,
+    config: configPath,
+  };
+}
+
+/**
+ * Ensure the AWS directory exists with secure permissions
+ * Creates the directory with 700 permissions (rwx for owner only)
+ */
+export function ensureAwsDirectoryExists(filePath: string): void {
+  const dir = path.dirname(filePath);
+  if (!fs.existsSync(dir)) {
+    core.debug(`Creating directory: ${dir}`);
+    fs.mkdirSync(dir, { recursive: true, mode: 0o700 });
+  }
+}
+
+/**
+ * Validate profile name format
+ * Profile names must be non-empty, contain no whitespace, brackets, or path separators
+ */
+export function validateProfileName(profileName: string): void {
+  if (!profileName || profileName.trim() === '') {
+    throw new Error('aws-profile must not be empty');
+  }
+
+  if (/\s/.test(profileName)) {
+    throw new Error('aws-profile must not contain whitespace');
+  }
+
+  // INI section names can't contain brackets
+  if (/[[\]]/.test(profileName)) {
+    throw new Error('aws-profile must not contain brackets');
+  }
+
+  // Prevent path traversal
+  if (profileName.includes('/') || profileName.includes('\\')) {
+    throw new Error('aws-profile must not contain path separators');
+  }
+}
+
+/**
+ * Merge a profile section into an INI file
+ * Reads existing file, updates the specified section, and writes back
+ */
+export function mergeProfileSection(
+  filePath: string,
+  sectionName: string,
+  data: Record<string, string>,
+  overwriteAwsProfile: boolean,
+): void {
+  let existingContent: Record<string, Record<string, string>> = {};
+
+  // Read existing file if it exists
+  if (fs.existsSync(filePath)) {
+    core.debug(`Reading existing file: ${filePath}`);
+    const fileContent = fs.readFileSync(filePath, 'utf-8');
+    existingContent = parseIni(fileContent);
+  }
+
+  if (existingContent[sectionName] && !overwriteAwsProfile) {
+    throw new Error(
+      `Profile with name "${sectionName}" already exists. Please use the overwrite-aws-profile input if you want to overwrite existing profiles.`,
+    );
+  }
+  // Merge: update existing profile or add new one
+  existingContent[sectionName] = data;
+
+  const content = stringifyIni(existingContent);
+
+  core.debug(`Writing profile to ${filePath}`);
+  fs.writeFileSync(filePath, content, { mode: 0o600 });
+}
+
+/**
+ * Write AWS profile files with credentials and configuration
+ * This is the main entry point for profile file operations
+ *
+ * @param profileName - Name of the AWS profile to configure
+ * @param credentials - AWS credentials (access key, secret key, session token)
+ * @param region - AWS region
+ */
+export function writeProfileFiles(
+  profileName: string,
+  credentials: Partial<Credentials>,
+  region: string,
+  overwriteAwsProfile: boolean,
+): void {
+  try {
+    // Validate profile name
+    validateProfileName(profileName);
+
+    const paths = getProfileFilePaths();
+
+    // Ensure .aws directory exists
+    ensureAwsDirectoryExists(paths.credentials);
+    ensureAwsDirectoryExists(paths.config);
+
+    // Prepare credentials data
+    const credentialsData: Record<string, string> = {};
+    if (credentials.AccessKeyId) {
+      credentialsData.aws_access_key_id = credentials.AccessKeyId;
+    }
+    if (credentials.SecretAccessKey) {
+      credentialsData.aws_secret_access_key = credentials.SecretAccessKey;
+    }
+    if (credentials.SessionToken) {
+      credentialsData.aws_session_token = credentials.SessionToken;
+    }
+
+    // Credentials file uses [profileName] syntax
+    const credsSectionName = profileName;
+
+    // Config file uses [profile profileName] syntax, except for 'default'
+    const configSectionName = profileName === 'default' ? 'default' : `profile ${profileName}`;
+
+    // Prepare config data
+    const configData: Record<string, string> = {
+      region: region,
+    };
+
+    // Write to credentials file
+    core.info(`Writing credentials to profile: ${profileName}`);
+    mergeProfileSection(paths.credentials, credsSectionName, credentialsData, overwriteAwsProfile);
+
+    // Write to config file
+    core.info(`Writing config to profile: ${profileName}`);
+    mergeProfileSection(paths.config, configSectionName, configData, overwriteAwsProfile);
+
+    core.info(`✓ Successfully configured AWS profile: ${profileName}`);
+  } catch (error) {
+    throw new Error(
+      `Failed to write AWS profile '${profileName}': ${error instanceof Error ? error.message : String(error)}`,
+    );
+  }
+}

test/ProxyResolver.test.ts

@@ -0,0 +1,100 @@
+import type * as http from 'node:http';
+import { describe, expect, test } from 'vitest';
+import { type ProxyOptions, ProxyResolver } from '../src/ProxyResolver';
+
+describe('ProxyResolver', () => {
+  const mockReq = {} as http.ClientRequest;
+
+  test('returns http proxy for http URLs', () => {
+    const options: ProxyOptions = { httpProxy: 'http://proxy:8080' };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('http://proxy:8080');
+  });
+
+  test('returns https proxy for https URLs', () => {
+    const options: ProxyOptions = { httpsProxy: 'https://proxy:8080' };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('https://example.com', mockReq)).toBe('https://proxy:8080');
+  });
+
+  test('returns empty string when no proxy configured', () => {
+    const resolver = new ProxyResolver({});
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+  });
+
+  test('respects noProxy setting', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: 'example.com',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://other.com', mockReq)).toBe('http://proxy:8080');
+  });
+
+  test('handles invalid URLs', () => {
+    const resolver = new ProxyResolver({ httpProxy: 'http://proxy:8080' });
+
+    expect(resolver.getProxyForUrl('invalid-url', mockReq)).toBe('');
+  });
+
+  test('handles wildcard noProxy', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: '*',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+  });
+
+  test('handles comma-separated noProxy list', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: 'example.com,test.com',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://test.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://other.com', mockReq)).toBe('http://proxy:8080');
+  });
+
+  test('handles port-specific noProxy', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: 'example.com:80',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://example.com:8080', mockReq)).toBe('http://proxy:8080');
+  });
+
+  test('handles wildcard domain noProxy', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: '*.example.com',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://sub.example.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('http://proxy:8080');
+    expect(resolver.getProxyForUrl('http://other.com', mockReq)).toBe('http://proxy:8080');
+  });
+
+  test('handles empty noProxy entries', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: 'example.com, ,test.com',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://test.com', mockReq)).toBe('');
+  });
+});

test/cleanup.test.ts

@@ -0,0 +1,73 @@
+import * as core from '@actions/core';
+import { STSClient } from '@aws-sdk/client-sts';
+import { mockClient } from 'aws-sdk-client-mock';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { cleanup } from '../src/cleanup';
+import mocks from './mockinputs.test';
+
+const mockedSTSClient = mockClient(STSClient);
+
+describe('Configure AWS Credentials cleanup', {}, () => {
+  beforeEach(() => {
+    // Reset mock state
+    vi.restoreAllMocks();
+    mockedSTSClient.reset();
+    // Mock GitHub Actions core functions
+    vi.spyOn(core, 'exportVariable').mockImplementation((_n, _v) => {});
+    vi.spyOn(core, 'setSecret').mockImplementation((_s) => {});
+    vi.spyOn(core, 'setFailed').mockImplementation((_m) => {});
+    vi.spyOn(core, 'setOutput').mockImplementation((_n, _v) => {});
+    vi.spyOn(core, 'debug').mockImplementation((_m) => {});
+    vi.spyOn(core, 'info').mockImplementation((_m) => {});
+    process.env = {
+      ...mocks.envs,
+      AWS_ACCESS_KEY_ID: 'CLEANUPTEST',
+      AWS_SECRET_ACCESS_KEY: 'CLEANUPTEST',
+      AWS_SESSION_TOKEN: 'CLEANUPTEST',
+      AWS_REGION: 'CLEANUPTEST',
+      AWS_DEFAULT_REGION: 'CLEANUPTEST',
+    };
+  });
+  it('replaces AWS credential and region environment variables with empty strings', {}, () => {
+    cleanup();
+    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(core.exportVariable).toHaveBeenCalledTimes(5);
+    expect(core.exportVariable).toHaveBeenCalledWith('AWS_ACCESS_KEY_ID', '');
+    expect(core.exportVariable).toHaveBeenCalledWith('AWS_SECRET_ACCESS_KEY', '');
+    expect(core.exportVariable).toHaveBeenCalledWith('AWS_SESSION_TOKEN', '');
+    expect(core.exportVariable).toHaveBeenCalledWith('AWS_DEFAULT_REGION', '');
+    expect(core.exportVariable).toHaveBeenCalledWith('AWS_REGION', '');
+  });
+  it('also clears AWS_PROFILE when aws-profile was set', {}, () => {
+    vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
+      if (name === 'aws-profile') return 'my-profile';
+      if (name === 'output-env-credentials') return 'true';
+      return '';
+    });
+    cleanup();
+    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(core.exportVariable).toHaveBeenCalledTimes(6);
+    expect(core.exportVariable).toHaveBeenCalledWith('AWS_PROFILE', '');
+  });
+  it('skips env cleanup when aws-profile is set without output-env-credentials', {}, () => {
+    vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
+      if (name === 'aws-profile') return 'my-profile';
+      return '';
+    });
+    cleanup();
+    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(core.exportVariable).toHaveBeenCalledTimes(0);
+  });
+  it('handles errors', {}, () => {
+    vi.spyOn(core, 'exportVariable').mockImplementationOnce(() => {
+      throw new Error('Test error');
+    });
+    cleanup();
+    expect(core.setFailed).toHaveBeenCalled();
+  });
+  it(`doesn't export credentials as empty env variables if asked not to`, {}, () => {
+    vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.NO_ENV_CREDS_INPUTS));
+    cleanup();
+    expect(core.exportVariable).toHaveBeenCalledTimes(0);
+  });
+});

test/helpers.test.ts

@@ -0,0 +1,100 @@
+import * as core from '@actions/core';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import * as helpers from '../src/helpers';
+
+describe('Configure AWS Credentials helpers', {}, () => {
+  beforeEach(() => {
+    vi.restoreAllMocks();
+    vi.spyOn(core, 'debug').mockImplementation(() => {});
+  });
+  it('removes brackets from GitHub Actor', {}, () => {
+    const actor = 'actor[bot]';
+    expect(helpers.sanitizeGitHubVariables(actor)).toBe('actor_bot_');
+  });
+  it('can sleep', {}, async () => {
+    const sleep = helpers.defaultSleep(10);
+    await expect(Promise.race([sleep, new Promise((_, reject) => setTimeout(reject, 20))])).resolves.toBe(undefined);
+  });
+  it('removes special characters from workflow names', {}, () => {
+    expect(helpers.sanitizeGitHubVariables('sdf234@#$%$^&*()_+{}|:"<>?')).toEqual('sdf234@__________+___:____');
+  });
+  it("doesn't retry non-retryable errors", {}, async () => {
+    const fn = vi.fn().mockRejectedValue('i am not retryable');
+    await expect(helpers.retryAndBackoff(fn, false)).rejects.toMatch('i am not retryable');
+    expect(fn).toHaveBeenCalledTimes(1);
+  });
+  it('can output creds when told to', {}, () => {
+    vi.spyOn(core, 'setOutput').mockImplementation(() => {});
+    vi.spyOn(core, 'setSecret').mockImplementation(() => {});
+    vi.spyOn(core, 'exportVariable').mockImplementation(() => {});
+    helpers.exportCredentials(
+      { AccessKeyId: 'test', SecretAccessKey: 'test', SessionToken: 'test', Expiration: new Date(8640000000000000) },
+      true,
+      true,
+    );
+    expect(core.setOutput).toHaveBeenCalledTimes(4);
+    expect(core.setSecret).toHaveBeenCalledTimes(3);
+    expect(core.exportVariable).toHaveBeenCalledTimes(3);
+  });
+  it('can unset credentials', {}, () => {
+    const env = process.env;
+    helpers.unsetCredentials();
+    expect(process.env.AWS_ACCESS_KEY_ID).toBeUndefined;
+    expect(process.env.AWS_SECRET_ACCESS_KEY).toBeUndefined;
+    expect(process.env.AWS_SESSION_TOKEN).toBeUndefined;
+    expect(process.env.AWS_REGION).toBeUndefined;
+    expect(process.env.AWS_DEFAULT_REGION).toBeUndefined;
+    process.env = env;
+  });
+  it(`won't output credentials to env if told not to`, {}, () => {
+    vi.spyOn(core, 'setOutput').mockImplementation(() => {});
+    vi.spyOn(core, 'setSecret').mockImplementation(() => {});
+    vi.spyOn(core, 'exportVariable').mockImplementation(() => {});
+    helpers.exportCredentials(
+      { AccessKeyId: 'test', SecretAccessKey: 'test', SessionToken: 'test', Expiration: new Date(8640000000000000) },
+      true,
+      false,
+    );
+    helpers.unsetCredentials(false);
+    helpers.exportRegion('fake-test-region', false);
+    expect(core.setOutput).toHaveBeenCalledTimes(4);
+    expect(core.setSecret).toHaveBeenCalledTimes(3);
+    expect(core.exportVariable).toHaveBeenCalledTimes(0);
+  });
+
+  it('verifies credentials without special characters', {}, () => {
+    expect(helpers.verifyKeys({ AccessKeyId: 'AKIATEST', SecretAccessKey: 'secretkey' })).toBe(true);
+    expect(helpers.verifyKeys({ AccessKeyId: 'AKIA!@#$', SecretAccessKey: 'secret' })).toBe(false);
+    expect(helpers.verifyKeys(undefined)).toBe(false);
+  });
+
+  it('translates environment variables', {}, () => {
+    process.env.AWS_REGION = 'us-east-1';
+    process.env.HTTPS_PROXY = 'https://proxy:8080';
+    helpers.translateEnvVariables();
+    expect(process.env['INPUT_AWS-REGION']).toBe('us-east-1');
+    expect(process.env.HTTP_PROXY).toBe('https://proxy:8080');
+  });
+
+  it('handles getBooleanInput correctly', {}, () => {
+    vi.spyOn(core, 'getInput').mockReturnValue('true');
+    expect(helpers.getBooleanInput('test')).toBe(true);
+    
+    vi.spyOn(core, 'getInput').mockReturnValue('false');
+    expect(helpers.getBooleanInput('test')).toBe(false);
+    
+    vi.spyOn(core, 'getInput').mockReturnValue('');
+    expect(helpers.getBooleanInput('test', { default: true })).toBe(true);
+    
+    vi.spyOn(core, 'getInput').mockReturnValue('invalid');
+    expect(() => helpers.getBooleanInput('test')).toThrow();
+  });
+
+  it('clears session token when not provided', {}, () => {
+    vi.spyOn(core, 'setSecret').mockImplementation(() => {});
+    vi.spyOn(core, 'exportVariable').mockImplementation(() => {});
+    process.env.AWS_SESSION_TOKEN = 'old-token';
+    helpers.exportCredentials({ AccessKeyId: 'test', SecretAccessKey: 'test' }, false, true);
+    expect(core.exportVariable).toHaveBeenCalledWith('AWS_SESSION_TOKEN', '');
+  });
+});

test/mockinputs.test.ts

@@ -0,0 +1,114 @@
+import type * as core from '@actions/core';
+
+const inputs = {
+  GH_OIDC_INPUTS: {
+    'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
+    'aws-region': 'fake-region-1',
+    'special-characters-workaround': 'true',
+  },
+  IAM_USER_INPUTS: {
+    'aws-access-key-id': 'MYAWSACCESSKEYID',
+    'aws-secret-access-key': 'MYAWSSECRETACCESSKEY',
+    'aws-region': 'fake-region-1',
+  },
+  IAM_ASSUMEROLE_INPUTS: {
+    'aws-access-key-id': 'MYAWSACCESSKEYID',
+    'aws-secret-access-key': 'MYAWSSECRETACCESSKEY',
+    'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
+    'aws-region': 'fake-region-1',
+  },
+  WEBIDENTITY_TOKEN_FILE_INPUTS: {
+    'web-identity-token-file': 'file.txt',
+    'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
+    'aws-region': 'fake-region-1',
+  },
+  EXISTING_ROLE_INPUTS: {
+    'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
+    'role-chaining': 'true',
+    'aws-region': 'fake-region-1',
+  },
+  USE_EXISTING_CREDENTIALS_INPUTS: {
+    'aws-region': 'fake-region-1',
+    'use-existing-credentials': 'true',
+    'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
+  },
+  NO_ENV_CREDS_INPUTS: {
+    'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
+    'aws-region': 'fake-region-1',
+    'output-env-credentials': 'false',
+  },
+  STEP_BUT_NO_ENV_INPUTS: {
+    'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
+    'aws-region': 'fake-region-1',
+    'output-env-credentials': 'false',
+    'output-credentials': 'true',
+  },
+};
+
+const envs = {
+  GITHUB_REPOSITORY: 'MY-REPOSITORY-NAME',
+  GITHUB_WORKFLOW: 'MY-WORKFLOW-ID',
+  GITHUB_ACTION: 'MY-ACTION-NAME',
+  GITHUB_ACTOR: 'MY-USERNAME[bot]',
+  GITHUB_SHA: 'MY-COMMIT-ID',
+  GITHUB_WORKSPACE: '/home/github',
+  GITHUB_ACTIONS: 'true',
+};
+
+const outputs = {
+  STS_CREDENTIALS: {
+    Credentials: {
+      AccessKeyId: 'STSAWSACCESSKEYID',
+      SecretAccessKey: 'STSAWSSECRETACCESSKEY',
+      SessionToken: 'STSAWSSESSIONTOKEN',
+      Expiration: new Date(8640000000000000),
+    },
+    AssumedRoleUser: {
+      Arn: 'arn:aws:sts::111111111111:assumed-role/MY-ROLE/',
+      AssumedRoleId: 'AROAFAKEASSUMEDROLEID',
+    },
+  },
+  GET_CALLER_IDENTITY: {
+    Account: '111111111111',
+    Arn: 'arn:aws:iam::111111111111:role/MY-ROLE',
+  },
+  FAKE_STS_ACCESS_KEY_ID: 'STSAWSACCESSKEYID',
+  FAKE_STS_SECRET_ACCESS_KEY: 'STSAWSSECRETACCESSKEY',
+  FAKE_STS_SESSION_TOKEN: 'STSAWSSESSIONTOKEN',
+  ODD_CHARACTER_CREDENTIALS: {
+    Credentials: {
+      AccessKeyId: 'STSA#$%^&',
+      SecretAccessKey: 'STSA#$%^&Key',
+      SessionToken: 'STSA#$%^',
+      Expiration: new Date(8640000000000000),
+    },
+    AssumedRoleUser: {
+      Arn: 'arn:aws:sts::111111111111:assumed-role/MY-ROLE/',
+      AssumedRoleId: 'AROAFAKEASSUMEDROLEID',
+    },
+  },
+};
+
+export default {
+  getInput: (fakeEnv: Record<string, string>) => {
+    return (name: string, options?: core.InputOptions): string => {
+      if (!fakeEnv[name]) {
+        if (options?.required) throw new Error(`Input ${name} not found`);
+        return '';
+      }
+      return fakeEnv[name];
+    };
+  },
+  getMultilineInput: (fakeEnv: Record<string, string[]>) => {
+    return (name: string, options?: core.InputOptions): string[] => {
+      if (!fakeEnv[name]) {
+        if (options?.required) throw new Error(`Input ${name} not found`);
+        return [];
+      }
+      return fakeEnv[name];
+    };
+  },
+  ...inputs,
+  outputs,
+  envs,
+} as const;

test/profileManager.test.ts

@@ -0,0 +1,724 @@
+import * as core from '@actions/core';
+import { fs, vol } from 'memfs';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import {
+  ensureAwsDirectoryExists,
+  getProfileFilePaths,
+  mergeProfileSection,
+  parseIni,
+  stringifyIni,
+  validateProfileName,
+  writeProfileFiles,
+} from '../src/profileManager';
+
+describe('Profile Manager', {}, () => {
+  beforeEach(() => {
+    vi.restoreAllMocks();
+    vi.mock('node:fs');
+    vol.reset();
+    vi.spyOn(core, 'debug').mockImplementation(() => {});
+    vi.spyOn(core, 'info').mockImplementation(() => {});
+  });
+
+  describe('parseIni', {}, () => {
+    it('parses a single section', {}, () => {
+      const result = parseIni('[dev]\naws_access_key_id=AKIA\naws_secret_access_key=secret\n');
+      expect(result.dev).toEqual({ aws_access_key_id: 'AKIA', aws_secret_access_key: 'secret' });
+    });
+
+    it('parses multiple sections', {}, () => {
+      const result = parseIni('[dev]\nkey=dev_val\n\n[prod]\nkey=prod_val\n');
+      expect(result.dev.key).toBe('dev_val');
+      expect(result.prod.key).toBe('prod_val');
+    });
+
+    it('skips comments and empty lines', {}, () => {
+      const result = parseIni('# comment\n; another comment\n\n[dev]\nkey=val\n');
+      expect(result.dev).toEqual({ key: 'val' });
+    });
+
+    it('trims whitespace around keys and values', {}, () => {
+      const result = parseIni('[dev]\n  key  =  val  \n');
+      expect(result.dev.key).toBe('val');
+    });
+
+    it('preserves section names with spaces (e.g. profile prefix)', {}, () => {
+      const result = parseIni('[profile dev]\nregion=us-east-1\n');
+      expect(result['profile dev']).toEqual({ region: 'us-east-1' });
+    });
+
+    it('guards against __proto__ section pollution', {}, () => {
+      const result = parseIni('[__proto__]\npolluted=true\n[safe]\nkey=val\n');
+      expect(result.__proto__).not.toHaveProperty('polluted');
+      expect(result.safe).toEqual({ key: 'val' });
+    });
+
+    it('guards against __proto__ key pollution', {}, () => {
+      const result = parseIni('[dev]\n__proto__=evil\naws_access_key_id=AKIA\n');
+      expect(result.dev).toEqual({ aws_access_key_id: 'AKIA' });
+      expect(result.dev).not.toHaveProperty('__proto__', 'evil');
+    });
+
+    it('handles values containing equals signs', {}, () => {
+      const result = parseIni('[dev]\naws_session_token=FwoGZXIvYXdzEBYa/base64==\n');
+      expect(result.dev.aws_session_token).toBe('FwoGZXIvYXdzEBYa/base64==');
+    });
+
+    it('handles empty values', {}, () => {
+      const result = parseIni('[dev]\ncli_pager=\n');
+      expect(result.dev.cli_pager).toBe('');
+    });
+
+    it('returns empty object for empty input', {}, () => {
+      expect(parseIni('')).toEqual({});
+    });
+
+    it('returns empty object for whitespace-only input', {}, () => {
+      expect(parseIni('   \n\n  \n')).toEqual({});
+    });
+
+    it('handles Windows line endings (CRLF)', {}, () => {
+      const result = parseIni('[dev]\r\naws_access_key_id=AKIA\r\naws_secret_access_key=secret\r\n');
+      expect(result.dev).toEqual({ aws_access_key_id: 'AKIA', aws_secret_access_key: 'secret' });
+    });
+  });
+
+  describe('stringifyIni', {}, () => {
+    it('serializes a single section', {}, () => {
+      const result = stringifyIni({ dev: { key: 'val' } });
+      expect(result).toBe('[dev]\nkey = val\n');
+    });
+
+    it('serializes multiple sections with blank line separator', {}, () => {
+      const result = stringifyIni({ dev: { a: '1' }, prod: { b: '2' } });
+      expect(result).toBe('[dev]\na = 1\n\n[prod]\nb = 2\n');
+    });
+
+    it('round-trips through parseIni', {}, () => {
+      const data = { dev: { aws_access_key_id: 'AKIA', aws_secret_access_key: 'secret' }, 'profile prod': { region: 'us-west-2' } };
+      const roundTripped = parseIni(stringifyIni(data));
+      expect(roundTripped).toEqual(data);
+    });
+
+    it('handles empty data object', {}, () => {
+      const result = stringifyIni({});
+      expect(result).toBe('\n');
+      expect(parseIni(result)).toEqual({});
+    });
+
+    it('handles section with no keys', {}, () => {
+      const result = stringifyIni({ dev: {} });
+      expect(result).toBe('[dev]\n');
+    });
+  });
+
+  describe('validateProfileName', {}, () => {
+    it('accepts valid profile names', {}, () => {
+      expect(() => validateProfileName('dev')).not.toThrow();
+      expect(() => validateProfileName('production')).not.toThrow();
+      expect(() => validateProfileName('my-profile-123')).not.toThrow();
+      expect(() => validateProfileName('default')).not.toThrow();
+    });
+
+    it('rejects empty profile names', {}, () => {
+      expect(() => validateProfileName('')).toThrow('aws-profile must not be empty');
+      expect(() => validateProfileName('   ')).toThrow('aws-profile must not be empty');
+    });
+
+    it('rejects profile names with whitespace', {}, () => {
+      expect(() => validateProfileName('my profile')).toThrow('aws-profile must not contain whitespace');
+      expect(() => validateProfileName('dev\ntest')).toThrow('aws-profile must not contain whitespace');
+      expect(() => validateProfileName('prod\tenv')).toThrow('aws-profile must not contain whitespace');
+    });
+
+    it('rejects profile names with brackets', {}, () => {
+      expect(() => validateProfileName('dev[test]')).toThrow('aws-profile must not contain brackets');
+      expect(() => validateProfileName('[profile]')).toThrow('aws-profile must not contain brackets');
+    });
+
+    it('rejects profile names with path separators', {}, () => {
+      expect(() => validateProfileName('dev/test')).toThrow('aws-profile must not contain path separators');
+      expect(() => validateProfileName('dev\\test')).toThrow('aws-profile must not contain path separators');
+      expect(() => validateProfileName('../etc/passwd')).toThrow('aws-profile must not contain path separators');
+    });
+  });
+
+  describe('getProfileFilePaths', {}, () => {
+    it('returns default paths when env vars not set', {}, () => {
+      delete process.env.AWS_SHARED_CREDENTIALS_FILE;
+      delete process.env.AWS_CONFIG_FILE;
+
+      const paths = getProfileFilePaths();
+
+      expect(paths.credentials).toMatch(/\.aws[/\\]credentials$/);
+      expect(paths.config).toMatch(/\.aws[/\\]config$/);
+    });
+
+    it('respects AWS_SHARED_CREDENTIALS_FILE env var', {}, () => {
+      process.env.AWS_SHARED_CREDENTIALS_FILE = '/custom/path/credentials';
+      process.env.AWS_CONFIG_FILE = '/custom/path/config';
+
+      const paths = getProfileFilePaths();
+
+      expect(paths.credentials).toBe('/custom/path/credentials');
+      expect(paths.config).toBe('/custom/path/config');
+    });
+  });
+
+  describe('ensureAwsDirectoryExists', {}, () => {
+    it('creates directory if it does not exist', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+
+      ensureAwsDirectoryExists(filePath);
+
+      expect(fs.existsSync('/home/runner/.aws')).toBe(true);
+    });
+
+    it('does not error if directory already exists', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      expect(() => ensureAwsDirectoryExists(filePath)).not.toThrow();
+    });
+
+    it('creates nested directories', {}, () => {
+      const filePath = '/home/runner/custom/path/.aws/credentials';
+
+      ensureAwsDirectoryExists(filePath);
+
+      expect(fs.existsSync('/home/runner/custom/path/.aws')).toBe(true);
+    });
+  });
+
+  describe('mergeProfileSection', {}, () => {
+    it('creates new file with profile section', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'AKIAIOSFODNN7EXAMPLE',
+        aws_secret_access_key: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY',
+      }, false);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev).toBeDefined();
+      expect(parsed.dev.aws_access_key_id).toBe('AKIAIOSFODNN7EXAMPLE');
+      expect(parsed.dev.aws_secret_access_key).toBe('wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY');
+    });
+
+    it('merges with existing profiles', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      // Create initial profile
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'AKIAIOSFODNN7EXAMPLE',
+        aws_secret_access_key: 'devSecretKey',
+      }, false);
+
+      // Add second profile
+      mergeProfileSection(filePath, 'prod', {
+        aws_access_key_id: 'AKIAPRODEXAMPLE',
+        aws_secret_access_key: 'prodSecretKey',
+      }, false);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev).toBeDefined();
+      expect(parsed.dev.aws_access_key_id).toBe('AKIAIOSFODNN7EXAMPLE');
+      expect(parsed.prod).toBeDefined();
+      expect(parsed.prod.aws_access_key_id).toBe('AKIAPRODEXAMPLE');
+    });
+
+    it('overwrites existing profile with same name', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      // Create initial profile
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'OLD_KEY',
+        aws_secret_access_key: 'oldSecretKey',
+        aws_session_token: 'oldSessionToken'
+      }, false);
+
+      // Overwrite with new credentials
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'NEW_KEY',
+        aws_secret_access_key: 'newSecretKey',
+        aws_session_token: 'newSessionToken',
+      }, true);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev.aws_access_key_id).toBe('NEW_KEY');
+      expect(parsed.dev.aws_secret_access_key).toBe('newSecretKey');
+      expect(parsed.dev.aws_session_token).toBe('newSessionToken');
+    });
+
+    it('overwriting a profile removes stale keys', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      // Create profile with session token
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'AKIA',
+        aws_secret_access_key: 'secret',
+        aws_session_token: 'old-token',
+      }, false);
+
+      // Overwrite without session token
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'AKIA2',
+        aws_secret_access_key: 'secret2',
+      }, true);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev.aws_access_key_id).toBe('AKIA2');
+      expect(parsed.dev.aws_secret_access_key).toBe('secret2');
+      expect(parsed.dev.aws_session_token).toBeUndefined();
+    });
+
+    it('handles empty existing file', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+      fs.writeFileSync(filePath, '', { mode: 0o600 });
+
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'AKIA',
+        aws_secret_access_key: 'secret',
+      }, false);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev.aws_access_key_id).toBe('AKIA');
+      expect(parsed.dev.aws_secret_access_key).toBe('secret');
+    });
+
+    it('errors if profile name already exists but overwrite flag is false', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      // Create initial profile
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'OLD_KEY',
+        aws_secret_access_key: 'oldSecretKey',
+      }, false);
+
+      // Overwrite with new credentials
+      expect(() => mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'NEW_KEY',
+        aws_secret_access_key: 'newSecretKey',
+        aws_session_token: 'sessionToken',
+      }, false)).toThrow(`Profile with name "dev" already exists. Please use the overwrite-aws-profile input if you want to overwrite existing profiles.`);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev.aws_access_key_id).toBe('OLD_KEY');
+      expect(parsed.dev.aws_secret_access_key).toBe('oldSecretKey');
+      expect(parsed.dev.aws_session_token).toBeUndefined();
+    });
+  });
+
+  describe('writeProfileFiles', {}, () => {
+    beforeEach(() => {
+      delete process.env.AWS_SHARED_CREDENTIALS_FILE;
+      delete process.env.AWS_CONFIG_FILE;
+    });
+
+    it('writes credentials and config for new profile', {}, () => {
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIAIOSFODNN7EXAMPLE',
+          SecretAccessKey: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY',
+          SessionToken: 'FwoGZXIvYXdzEBYaDEXAMPLE',
+        },
+        'us-east-1',
+        false,
+      );
+
+      // Check credentials file
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+      const credParsed = parseIni(credContent);
+
+      expect(credParsed.dev).toBeDefined();
+      expect(credParsed.dev.aws_access_key_id).toBe('AKIAIOSFODNN7EXAMPLE');
+      expect(credParsed.dev.aws_secret_access_key).toBe('wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY');
+      expect(credParsed.dev.aws_session_token).toBe('FwoGZXIvYXdzEBYaDEXAMPLE');
+
+      // Check config file
+      const configPath = getProfileFilePaths().config;
+      const configContent = fs.readFileSync(configPath, 'utf-8');
+      const configParsed = parseIni(configContent);
+
+      expect(configParsed['profile dev']).toBeDefined();
+      expect(configParsed['profile dev'].region).toBe('us-east-1');
+    });
+
+    it('uses correct section naming for default profile', {}, () => {
+      writeProfileFiles(
+        'default',
+        {
+          AccessKeyId: 'AKIAIOSFODNN7EXAMPLE',
+          SecretAccessKey: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY',
+        },
+        'us-west-2',
+        false,
+      );
+
+      // Check credentials file uses [default]
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+      const credParsed = parseIni(credContent);
+
+      expect(credParsed.default).toBeDefined();
+      expect(credParsed['profile default']).toBeUndefined();
+
+      // Check config file uses [default] (not [profile default])
+      const configPath = getProfileFilePaths().config;
+      const configContent = fs.readFileSync(configPath, 'utf-8');
+      const configParsed = parseIni(configContent);
+
+      expect(configParsed.default).toBeDefined();
+      expect(configParsed['profile default']).toBeUndefined();
+    });
+
+    it('supports multiple profiles', {}, () => {
+      // Write first profile
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIADEV',
+          SecretAccessKey: 'devSecret',
+        },
+        'us-east-1',
+        false,
+      );
+
+      // Write second profile
+      writeProfileFiles(
+        'prod',
+        {
+          AccessKeyId: 'AKIAPROD',
+          SecretAccessKey: 'prodSecret',
+          SessionToken: 'prodToken',
+        },
+        'us-west-2',
+        false,
+      );
+
+      // Verify both profiles exist
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+      const credParsed = parseIni(credContent);
+
+      expect(credParsed.dev).toBeDefined();
+      expect(credParsed.prod).toBeDefined();
+      expect(credParsed.dev.aws_access_key_id).toBe('AKIADEV');
+      expect(credParsed.prod.aws_access_key_id).toBe('AKIAPROD');
+    });
+
+    it('handles credentials without session token', {}, () => {
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIAIOSFODNN7EXAMPLE',
+          SecretAccessKey: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY',
+        },
+        'us-east-1',
+        false,
+      );
+
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+      const credParsed = parseIni(credContent);
+
+      expect(credParsed.dev.aws_access_key_id).toBe('AKIAIOSFODNN7EXAMPLE');
+      expect(credParsed.dev.aws_secret_access_key).toBe('wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY');
+      expect(credParsed.dev.aws_session_token).toBeUndefined();
+    });
+
+    it('throws error for invalid profile name', {}, () => {
+      expect(() =>
+        writeProfileFiles(
+          'invalid profile',
+          {
+            AccessKeyId: 'AKIA',
+            SecretAccessKey: 'secret',
+          },
+          'us-east-1',
+          false,
+        ),
+      ).toThrow('Failed to write AWS profile');
+      expect(() =>
+        writeProfileFiles(
+          'invalid profile',
+          {
+            AccessKeyId: 'AKIA',
+            SecretAccessKey: 'secret',
+          },
+          'us-east-1',
+          false
+        ),
+      ).toThrow('whitespace');
+    });
+
+    it('respects custom file paths from env vars', {}, () => {
+      process.env.AWS_SHARED_CREDENTIALS_FILE = '/custom/credentials';
+      process.env.AWS_CONFIG_FILE = '/custom/config';
+
+      fs.mkdirSync('/custom', { recursive: true });
+
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIA',
+          SecretAccessKey: 'secret',
+        },
+        'us-east-1',
+        false
+      );
+
+      expect(fs.existsSync('/custom/credentials')).toBe(true);
+      expect(fs.existsSync('/custom/config')).toBe(true);
+    });
+
+    it('logs info messages', {}, () => {
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIA',
+          SecretAccessKey: 'secret',
+        },
+        'us-east-1',
+        false
+      );
+
+      expect(core.info).toHaveBeenCalledWith('Writing credentials to profile: dev');
+      expect(core.info).toHaveBeenCalledWith('Writing config to profile: dev');
+      expect(core.info).toHaveBeenCalledWith('✓ Successfully configured AWS profile: dev');
+    });
+
+    it('preserves pre-existing unrelated profiles in credentials file', {}, () => {
+      const credsPath = getProfileFilePaths().credentials;
+      fs.mkdirSync(require('node:path').dirname(credsPath), { recursive: true });
+      fs.writeFileSync(
+        credsPath,
+        '[personal]\naws_access_key_id=AKIAPERSONAL\naws_secret_access_key=personalSecret\naws_session_token=personalToken\n',
+      );
+
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIADEV', SecretAccessKey: 'devSecret' },
+        'us-east-1',
+        false,
+      );
+
+      const content = fs.readFileSync(credsPath, 'utf-8');
+      const parsed = parseIni(content);
+
+      // Pre-existing profile must be fully intact
+      expect(parsed.personal).toEqual({
+        aws_access_key_id: 'AKIAPERSONAL',
+        aws_secret_access_key: 'personalSecret',
+        aws_session_token: 'personalToken',
+      });
+      // New profile also present
+      expect(parsed.dev.aws_access_key_id).toBe('AKIADEV');
+    });
+
+    it('preserves pre-existing config with extra keys', {}, () => {
+      const configPath = getProfileFilePaths().config;
+      fs.mkdirSync(require('node:path').dirname(configPath), { recursive: true });
+      fs.writeFileSync(
+        configPath,
+        '[profile personal]\nregion=eu-west-1\noutput=json\ncli_pager=\n',
+      );
+
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIA', SecretAccessKey: 'secret' },
+        'us-east-1',
+        false
+      );
+
+      const content = fs.readFileSync(configPath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed['profile personal']).toEqual({
+        region: 'eu-west-1',
+        output: 'json',
+        cli_pager: '',
+      });
+      expect(parsed['profile dev'].region).toBe('us-east-1');
+    });
+
+    it('preserves pre-existing default profile when writing a named profile', {}, () => {
+      const credsPath = getProfileFilePaths().credentials;
+      fs.mkdirSync(require('node:path').dirname(credsPath), { recursive: true });
+      fs.writeFileSync(
+        credsPath,
+        '[default]\naws_access_key_id=AKIADEFAULT\naws_secret_access_key=defaultSecret\n',
+      );
+
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIADEV', SecretAccessKey: 'devSecret' },
+        'us-west-2',
+        false
+      );
+
+      const content = fs.readFileSync(credsPath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.default).toEqual({
+        aws_access_key_id: 'AKIADEFAULT',
+        aws_secret_access_key: 'defaultSecret',
+      });
+      expect(parsed.dev.aws_access_key_id).toBe('AKIADEV');
+    });
+
+    it('comments in pre-existing files are stripped on round-trip', {}, () => {
+      const credsPath = getProfileFilePaths().credentials;
+      fs.mkdirSync(require('node:path').dirname(credsPath), { recursive: true });
+      fs.writeFileSync(
+        credsPath,
+        '# My important comment\n[personal]\naws_access_key_id=AKIA\naws_secret_access_key=secret\n',
+      );
+
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIADEV', SecretAccessKey: 'devSecret' },
+        'us-east-1',
+        false
+      );
+
+      const content = fs.readFileSync(credsPath, 'utf-8') as string;
+
+      // Comment is lost (known trade-off), but profile data is preserved
+      expect(content).not.toContain('# My important comment');
+      const parsed = parseIni(content);
+      expect(parsed.personal.aws_access_key_id).toBe('AKIA');
+      expect(parsed.dev.aws_access_key_id).toBe('AKIADEV');
+    });
+
+    it('writes empty section when credentials object has no keys', {}, () => {
+      writeProfileFiles('dev', {}, 'us-east-1', false);
+
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+      const credParsed = parseIni(credContent);
+
+      // Section exists but has no credential keys
+      expect(credParsed.dev).toEqual({});
+
+      // Config still gets region
+      const configPath = getProfileFilePaths().config;
+      const configContent = fs.readFileSync(configPath, 'utf-8');
+      const configParsed = parseIni(configContent);
+      expect(configParsed['profile dev'].region).toBe('us-east-1');
+    });
+
+    it('resolves credentials and config paths independently from env vars', {}, () => {
+      process.env.AWS_SHARED_CREDENTIALS_FILE = '/custom-creds/credentials';
+      // AWS_CONFIG_FILE is NOT set — should use default path
+
+      fs.mkdirSync('/custom-creds', { recursive: true });
+
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIA', SecretAccessKey: 'secret' },
+        'us-east-1',
+        false
+      );
+
+      expect(fs.existsSync('/custom-creds/credentials')).toBe(true);
+      // Config file should be at the default path (under homedir)
+      const defaultConfigPath = require('node:path').join(require('node:os').homedir(), '.aws', 'config');
+      expect(fs.existsSync(defaultConfigPath)).toBe(true);
+    });
+
+    it('produces AWS CLI-compatible INI output (golden file)', {}, () => {
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIAIOSFODNN7EXAMPLE',
+          SecretAccessKey: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY',
+          SessionToken: 'FwoGZXIvYXdzEBYaDEXAMPLE',
+        },
+        'us-east-1',
+        false
+      );
+
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+
+      const configPath = getProfileFilePaths().config;
+      const configContent = fs.readFileSync(configPath, 'utf-8');
+
+      // Verify exact byte-for-byte format matching AWS CLI style:
+      // - [section] header on its own line
+      // - key = value with spaces around =
+      // - LF line endings, trailing newline
+      expect(credContent).toBe(
+        '[dev]\n' +
+        'aws_access_key_id = AKIAIOSFODNN7EXAMPLE\n' +
+        'aws_secret_access_key = wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY\n' +
+        'aws_session_token = FwoGZXIvYXdzEBYaDEXAMPLE\n',
+      );
+      expect(configContent).toBe(
+        '[profile dev]\n' +
+        'region = us-east-1\n',
+      );
+    });
+
+    it('golden file for multi-profile output', {}, () => {
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIADEV', SecretAccessKey: 'devSecret' },
+        'us-east-1',
+        false
+      );
+      writeProfileFiles(
+        'prod',
+        { AccessKeyId: 'AKIAPROD', SecretAccessKey: 'prodSecret', SessionToken: 'prodToken' },
+        'us-west-2',
+        false
+      );
+
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+
+      const configPath = getProfileFilePaths().config;
+      const configContent = fs.readFileSync(configPath, 'utf-8');
+
+      expect(credContent).toBe(
+        '[dev]\n' +
+        'aws_access_key_id = AKIADEV\n' +
+        'aws_secret_access_key = devSecret\n' +
+        '\n' +
+        '[prod]\n' +
+        'aws_access_key_id = AKIAPROD\n' +
+        'aws_secret_access_key = prodSecret\n' +
+        'aws_session_token = prodToken\n',
+      );
+      expect(configContent).toBe(
+        '[profile dev]\n' +
+        'region = us-east-1\n' +
+        '\n' +
+        '[profile prod]\n' +
+        'region = us-west-2\n',
+      );
+    });
+  });
+});

tsconfig.json

@@ -0,0 +1,31 @@
+{
+  "compilerOptions": {
+    "allowUnreachableCode": false,
+    "allowUnusedLabels": false,
+    "strict": true,
+    "exactOptionalPropertyTypes": true,
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitOverride": true,
+    "noImplicitReturns": true,
+    "noPropertyAccessFromIndexSignature": false,
+    "noUncheckedIndexedAccess": true,
+    "noUnusedParameters": true,
+    "module": "CommonJS",
+    "resolveJsonModule": true,
+    "outDir": "build",
+    "declaration": false,
+    "newLine": "lf",
+    "noEmitOnError": true,
+    "sourceMap": true,
+    "disableSizeLimit": true,
+    "forceConsistentCasingInFileNames": true,
+    "lib": ["ES2020"],
+    "target": "ES2020",
+    "noErrorTruncation": true,
+    "esModuleInterop": true,
+    "rootDir": "src",
+    "skipLibCheck": true
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["test/**/*.ts"]
+}

tsconfig.test.json

@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "include": ["test/**/*.ts", "src/**/*.ts"],
+  "exclude": [],
+  "compilerOptions": {
+    "rootDir": "./"
+  }
+}

vitest.config.mts

@@ -0,0 +1,10 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    passWithNoTests: true,
+    include: ['test/**/*.test.ts'],
+    coverage: { enabled: true },
+    typecheck: { tsconfig: './tsconfig.test.json' },
+  },
+});