skip attestation store

Signed-off-by: Brian DeHamer <[email protected]>
2024-05-31 10:07:45 -07:00
30 changed files with 37084 additions and 113 deletions
@@ -0,0 +1,4 @@
+lib/
+dist/
+node_modules/
+coverage/
@@ -10,4 +10,19 @@ updates:
          - minor
          - patch
    ignore:
-      - dependency-name: 'actions/attest-sbom'
+      - dependency-name: "actions/attest-sbom"
+
+  - package-ecosystem: npm
+    directory: /
+    schedule:
+      interval: weekly
+    groups:
+      npm-development:
+        dependency-type: development
+        update-types:
+          - minor
+          - patch
+      npm-production:
+        dependency-type: production
+        update-types:
+          - patch
@@ -0,0 +1,83 @@
+env:
+  node: true
+  es6: true
+  jest: true
+
+globals:
+  Atomics: readonly
+  SharedArrayBuffer: readonly
+
+ignorePatterns:
+  - '!.*'
+  - '**/node_modules/.*'
+  - '**/dist/.*'
+  - '**/coverage/.*'
+  - '*.json'
+
+parser: '@typescript-eslint/parser'
+
+parserOptions:
+  ecmaVersion: 2023
+  sourceType: module
+  project:
+    - './.github/linters/tsconfig.json'
+    - './tsconfig.json'
+
+plugins:
+  - jest
+  - '@typescript-eslint'
+
+extends:
+  - eslint:recommended
+  - plugin:@typescript-eslint/eslint-recommended
+  - plugin:@typescript-eslint/recommended
+  - plugin:github/recommended
+  - plugin:jest/recommended
+
+rules:
+  {
+    'camelcase': 'off',
+    'eslint-comments/no-use': 'off',
+    'eslint-comments/no-unused-disable': 'off',
+    'i18n-text/no-en': 'off',
+    'import/no-namespace': 'off',
+    'no-console': 'off',
+    'no-unused-vars': 'off',
+    'prettier/prettier': 'error',
+    'semi': 'off',
+    '@typescript-eslint/array-type': 'error',
+    '@typescript-eslint/await-thenable': 'error',
+    '@typescript-eslint/ban-ts-comment': 'error',
+    '@typescript-eslint/consistent-type-assertions': 'error',
+    '@typescript-eslint/explicit-member-accessibility':
+      ['error', { 'accessibility': 'no-public' }],
+    '@typescript-eslint/explicit-function-return-type':
+      ['error', { 'allowExpressions': true }],
+    '@typescript-eslint/func-call-spacing': ['error', 'never'],
+    '@typescript-eslint/no-array-constructor': 'error',
+    '@typescript-eslint/no-empty-interface': 'error',
+    '@typescript-eslint/no-explicit-any': 'error',
+    '@typescript-eslint/no-extraneous-class': 'error',
+    '@typescript-eslint/no-for-in-array': 'error',
+    '@typescript-eslint/no-inferrable-types': 'error',
+    '@typescript-eslint/no-misused-new': 'error',
+    '@typescript-eslint/no-namespace': 'error',
+    '@typescript-eslint/no-non-null-assertion': 'warn',
+    '@typescript-eslint/no-require-imports': 'error',
+    '@typescript-eslint/no-unnecessary-qualifier': 'error',
+    '@typescript-eslint/no-unnecessary-type-assertion': 'error',
+    '@typescript-eslint/no-unused-vars': 'error',
+    '@typescript-eslint/no-useless-constructor': 'error',
+    '@typescript-eslint/no-var-requires': 'error',
+    '@typescript-eslint/prefer-for-of': 'warn',
+    '@typescript-eslint/prefer-function-type': 'warn',
+    '@typescript-eslint/prefer-includes': 'error',
+    '@typescript-eslint/prefer-string-starts-ends-with': 'error',
+    '@typescript-eslint/promise-function-async': 'error',
+    '@typescript-eslint/require-array-sort-compare': 'error',
+    '@typescript-eslint/restrict-plus-operands': 'error',
+    '@typescript-eslint/semi': ['error', 'never'],
+    '@typescript-eslint/space-before-function-paren': 'off',
+    '@typescript-eslint/type-annotation-spacing': 'error',
+    '@typescript-eslint/unbound-method': 'error'
+  }
@@ -0,0 +1,10 @@
+rules:
+  document-end: disable
+  document-start:
+    level: warning
+    present: false
+  line-length:
+    level: warning
+    max: 80
+    allow-non-breakable-words: true
+    allow-non-breakable-inline-mappings: true
@@ -0,0 +1,9 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "noEmit": true
+  },
+  "include": ["../../__tests__/**/*", "../../src/**/*"],
+  "exclude": ["../../dist", "../../node_modules", "../../coverage", "*.json"]
+}
@@ -0,0 +1,66 @@
+# In TypeScript actions, `dist/` is a special directory. When you reference
+# an action with the `uses:` property, `dist/index.js` is the code that will be
+# run. For this project, the `dist/index.js` file is transpiled from other
+# source files. This workflow ensures the `dist/` directory contains the
+# expected transpiled code.
+#
+# If this workflow is run from a feature branch, it will act as an additional CI
+# check and fail if the checked-in `dist/` directory does not match what is
+# expected from the build.
+name: Check Transpiled JavaScript
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  check-dist:
+    name: Check dist/
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        id: setup-node
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: .node-version
+          cache: npm
+
+      - name: Install Dependencies
+        id: install
+        run: npm ci
+
+      - name: Build dist/ Directory
+        id: build
+        run: npm run bundle
+
+      # This will fail the workflow if the PR wasn't created by Dependabot.
+      - name: Compare Directories
+        id: diff
+        run: |
+          if [ "$(git diff --ignore-space-at-eol --text dist/ | wc -l)" -gt "0" ]; then
+            echo "Detected uncommitted changes after build. See status below:"
+            git diff --ignore-space-at-eol --text dist/
+            exit 1
+          fi
+
+      # If `dist/` was different than expected, and this was not a Dependabot
+      # PR, upload the expected version as a workflow artifact.
+      - if: ${{ failure() && steps.diff.outcome == 'failure' }}
+        name: Upload Artifact
+        id: upload
+        uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: dist/
@@ -12,8 +12,42 @@ on:
 permissions: {}

 jobs:
+  test-typescript:
+    name: TypeScript Tests
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+
+      - name: Setup Node.js
+        id: setup-node
+        uses: actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8 # v4.0.1
+        with:
+          node-version-file: .node-version
+          cache: npm
+
+      - name: Install Dependencies
+        id: npm-ci
+        run: npm ci
+
+      - name: Check Format
+        id: npm-format-check
+        run: npm run format:check
+
+      - name: Lint
+        id: npm-lint
+        run: npm run lint
+
+      - name: Test
+        id: npm-ci-test
+        run: npm run ci-test
+
  test-attest-sbom:
-    name: Test attest-sbom action with local sbom file
+    name: Test attest-sbom action with local sbom file 
    runs-on: ubuntu-latest
    permissions:
      attestations: write
@@ -23,7 +57,7 @@ jobs:
    steps:
      - name: Checkout
        id: checkout
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
      - name: Run attest-sbom
        id: attest-sbom
        uses: ./
@@ -0,0 +1,50 @@
+name: CodeQL
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: '31 7 * * 3'
+
+permissions: {}
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    permissions:
+      actions: read
+      checks: write
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language:
+          - TypeScript
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+
+      - name: Initialize CodeQL
+        id: initialize
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          source-root: src
+
+      - name: Autobuild
+        id: autobuild
+        uses: github/codeql-action/autobuild@v3
+
+      - name: Perform CodeQL Analysis
+        id: analyze
+        uses: github/codeql-action/analyze@v3
@@ -0,0 +1,50 @@
+name: Lint Codebase
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+  packages: read
+  statuses: write
+
+jobs:
+  lint:
+    name: Lint Codebase
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        id: setup-node
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: .node-version
+          cache: npm
+
+      - name: Install Dependencies
+        id: install
+        run: npm ci
+
+      - name: Lint Codebase
+        id: super-linter
+        uses: super-linter/super-linter/slim@v6
+        env:
+          DEFAULT_BRANCH: main
+          FILTER_REGEX_EXCLUDE: dist/**/*
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TYPESCRIPT_DEFAULT_STYLE: prettier
+          VALIDATE_ALL_CODEBASE: true
+          VALIDATE_JAVASCRIPT_STANDARD: false
+          VALIDATE_JSCPD: false
+          VALIDATE_GITHUB_ACTIONS: false
@@ -0,0 +1 @@
+20.6.0
@@ -0,0 +1,3 @@
+dist/
+node_modules/
+coverage/
@@ -0,0 +1,16 @@
+{
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": false,
+  "singleQuote": true,
+  "quoteProps": "as-needed",
+  "jsxSingleQuote": false,
+  "trailingComma": "none",
+  "bracketSpacing": true,
+  "bracketSameLine": true,
+  "arrowParens": "avoid",
+  "proseWrap": "always",
+  "htmlWhitespaceSensitivity": "css",
+  "endOfLine": "lf"
+}
@@ -1,12 +1,5 @@
 # `actions/attest-sbom`

-<!-- prettier-ignore-start -->
-> [!WARNING]
-> This action is being deprecated in favor of [`actions/attest`][9]. `actions/attest-sbom` will continue to function as a wrapper on top of `actions/attest` for some period of time, but applications should make plans to migrate.
->
-> All of the existing action inputs are compatible with the `actions/attest` interface.
-<!-- prettier-ignore-end -->
-
 Generate signed SBOM attestations for workflow artifacts. Internally powered by
 the [@actions/attest][1] package.

@@ -28,27 +21,208 @@ initiated.
 Attestations can be verified using the [`attestation` command in the GitHub
 CLI][7].

-See [Using artifact attestations to establish provenance for builds][8] for more
-information on artifact attestations.
-
-<!-- prettier-ignore-start -->
-> [!NOTE]
-> Artifact attestations are available in public repositories for all
-> current GitHub plans. They are not available on legacy plans, such as Bronze,
-> Silver, or Gold. If you are on a GitHub Free, GitHub Pro, or GitHub Team plan,
-> artifact attestations are only available for public repositories. To use
-> artifact attestations in private or internal repositories, you must be on a
-> GitHub Enterprise Cloud plan.
-<!-- prettier-ignore-end -->
+See [Using artifact attestations to establish provenance for builds][11]
+for more information on artifact attestations.

 ## Usage

-**As of version 4, `actions/attest-sbom` is simply a wrapper on top of
-[`actions/attest`][9].**
+Within the GitHub Actions workflow which builds some artifact you would like to
+attest:

-Please see the [`actions/attest`][9] repository for usage information.
+1. Ensure that the following permissions are set:

-Documentation for previous versions of this action can be found [here][10].
+   ```yaml
+   permissions:
+     id-token: write
+     attestations: write
+   ```
+
+   The `id-token` permission gives the action the ability to mint the OIDC token
+   necessary to request a Sigstore signing certificate. The `attestations`
+   permission is necessary to persist the attestation.
+
+1. Add the following to your workflow after your artifact has been built and
+   your SBOM has been generated:
+
+   ```yaml
+   - uses: actions/attest-sbom@v1
+     with:
+       subject-path: '<PATH TO ARTIFACT>'
+       sbom-path: '<PATH TO SBOM>'
+   ```
+
+   The `subject-path` parameter should identify the artifact for which you want
+   to generate an SBOM attestation. The `sbom-path` parameter should identify
+   the SBOM document to be associated with the subject.
+
+### Inputs
+
+See [action.yml](action.yml)
+
+```yaml
+- uses: actions/attest-sbom@v1
+  with:
+    # Path to the artifact serving as the subject of the attestation. Must
+    # specify exactly one of "subject-path" or "subject-digest".
+    subject-path:
+
+    # SHA256 digest of the subject for the attestation. Must be in the form
+    # "sha256:hex_digest" (e.g. "sha256:abc123..."). Must specify exactly one
+    # of "subject-path" or "subject-digest".
+    subject-digest:
+
+    # Subject name as it should appear in the attestation. Required unless
+    # "subject-path" is specified, in which case it will be inferred from the
+    # path.
+    subject-name:
+
+    # Path to the JSON-formatted SBOM file to attest. When specified, the
+    # "scan-path" and "sbom-format" inputs are ignored.
+    sbom-path:
+
+    # Whether to push the attestation to the image registry. Requires that the
+    # "subject-name" parameter specify the fully-qualified image name and that
+    # the "subject-digest" parameter be specified. Defaults to false.
+    push-to-registry:
+
+    # The GitHub token used to make authenticated API requests. Default is
+    # ${{ github.token }}
+    github-token:
+```
+
+### Outputs
+
+<!-- markdownlint-disable MD013 -->
+
+| Name          | Description                                                    | Example                 |
+| ------------- | -------------------------------------------------------------- | ----------------------- |
+| `bundle-path` | Absolute path to the file containing the generated attestation | `/tmp/attestaion.jsonl` |
+
+<!-- markdownlint-enable MD013 -->
+
+Attestations are saved in the JSON-serialized [Sigstore bundle][8] format.
+
+If multiple subjects are being attested at the same time, each attestation will
+be written to the output file on a separate line (using the [JSON Lines][9]
+format).
+
+## Examples
+
+### Identify Subject and SBOM by Path
+
+For the basic use case, simply add the `attest-sbom` action to your workflow and
+supply the path to the artifact and SBOM for which you want to generate
+attestation.
+
+```yaml
+name: build-attest
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    permissions:
+      id-token: write
+      contents: read
+      attestations: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Build artifact
+        run: make my-app
+      - name: Generate SBOM
+        uses: anchore/sbom-action@v0
+        with:
+          format: 'spdx-json'
+          output-file: 'sbom.spdx.json'
+      - name: Attest
+        uses: actions/attest-sbom@v1
+        with:
+          subject-path: '${{ github.workspace }}/my-app'
+          sbom-path: 'sbom.spdx.json'
+```
+
+### Identify Subjects by Wildcard
+
+If you are generating multiple artifacts, you can generate an attestation for
+each by using a wildcard in the `subject-path` input.
+
+```yaml
+- uses: actions/attest-sbom@v1
+  with:
+    subject-path: 'dist/**/my-bin-*'
+    sbom-path: '${{ github.workspace }}/my-bin.sbom.spdx.json'
+```
+
+For supported wildcards along with behavior and documentation, see
+[@actions/glob][10] which is used internally to search for files.
+
+### Container Image
+
+When working with container images you can invoke the action with the
+`subject-name` and `subject-digest` inputs.
+
+If you want to publish the attestation to the container registry with the
+`push-to-registry` option, it is important that the `subject-name` specify the
+fully-qualified image name (e.g. "ghcr.io/user/app" or
+"acme.azurecr.io/user/app"). Do NOT include a tag as part of the image name --
+the specific image being attested is identified by the supplied digest.
+
+> **NOTE**: When pushing to Docker Hub, please use "index.docker.io" as the
+> registry portion of the image name.
+
+```yaml
+name: build-attested-image
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      packages: write
+      contents: read
+      attestations: write
+    env:
+      REGISTRY: ghcr.io
+      IMAGE_NAME: ${{ github.repository }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push image
+        id: push
+        uses: docker/[email protected]
+        with:
+          context: .
+          push: true
+          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+      - name: Generate SBOM
+        uses: anchore/sbom-action@v0
+        with:
+          image: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+          format: 'cyclonedx-json'
+          output-file: 'sbom.cyclonedx.json'
+      - name: Attest
+        uses: actions/attest-sbom@v1
+        id: attest
+        with:
+          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          subject-digest: ${{ steps.push.outputs.digest }}
+          sbom-path: 'sbom.cyclonedx.json'
+          push-to-registry: true
+```

 [1]: https://github.com/actions/toolkit/tree/main/packages/attest
 [2]: https://github.com/in-toto/attestation/tree/main/spec/v1
@@ -57,7 +231,7 @@ Documentation for previous versions of this action can be found [here][10].
 [6]: https://www.sigstore.dev/
 [7]: https://cli.github.com/manual/gh_attestation_verify
 [8]:
-  https://docs.github.com/en/actions/security-guides/using-artifact-attestations-to-establish-provenance-for-builds
-[9]: https://github.com/actions/attest
-[10]:
-  https://github.com/actions/attest-sbom/tree/v3.0.0?tab=readme-ov-file#actionsattest-sbom
+  https://github.com/sigstore/protobuf-specs/blob/main/protos/sigstore_bundle.proto
+[9]: https://jsonlines.org/
+[10]: https://github.com/actions/toolkit/tree/main/packages/glob#patterns
+[11]: https://docs.github.com/en/actions/security-guides/using-artifact-attestations-to-establish-provenance-for-builds
@@ -1,12 +1,12 @@
 # Release Instructions

-Follow the steps below to tag a new release for the `actions/attest-sbom`
-action.
+Follow the steps below to tag a new release for the
+`actions/attest-sbom` action.

-If changes were made to the internal `actions/attest-sbom/predicate` action (any
-updates to [`./predicate/action.yaml`](./predicate/action.yml) or any of the
-code in the [`./src`](./src) directory), start with step #1; otherwise, skip
-directly to step #5.
+If changes were made to the internal `actions/attest-sbom/predicate`
+action (any updates to [`./predicate/action.yaml`](./predicate/action.yml) or
+any of the code in the [`./src`](./src) directory), start with step #1;
+otherwise, skip directly to step #5.

 1. Merge the latest changes to the `main` branch.
 1. Create and push a new predicate tag of the form `[email protected]` following
@@ -17,8 +17,9 @@ directly to step #5.
   git push --tags
   ```

-1. Update the reference to the `actions/attest-sbom/predicate` action in
-   [`action.yml`](./action.yml) to point to the SHA of the newly created tag.
+1. Update the reference to the `actions/attest-sbom/predicate`
+   action in [`action.yml`](./action.yml) to point to the SHA of the newly
+   created tag.
 1. Push the `action.yml` change and open a PR. Once it has been reviewed, merge
   the PR and proceed with the release instructions.
 1. Create a new release for the top-level action using a tag of the form
@@ -1,38 +1,41 @@
 {
-  "spdxVersion": "SPDX-2.3",
-  "dataLicense": "CC0-1.0",
-  "SPDXID": "SPDXRef-DOCUMENT",
-  "name": "./",
-  "documentNamespace": "https://anchore.com/syft/dir/80b363b6-87f4-4162-853f-60d402537d20",
-  "creationInfo": {
-    "licenseListVersion": "3.22",
-    "creators": ["Organization: Anchore, Inc", "Tool: syft-0.103.1"],
-    "created": "2024-01-31T18:22:50Z"
-  },
-  "packages": [
-    {
-      "name": "@ampproject/remapping",
-      "SPDXID": "SPDXRef-Package-npm--ampproject-remapping-5266573ba4f24a42",
-      "versionInfo": "2.2.1",
-      "supplier": "NOASSERTION",
-      "downloadLocation": "NOASSERTION",
-      "filesAnalyzed": false,
-      "sourceInfo": "acquired package info from installed node module manifest file: /yarn.lock",
-      "licenseConcluded": "NOASSERTION",
-      "licenseDeclared": "Apache-2.0",
-      "copyrightText": "NOASSERTION",
-      "externalRefs": [
-        {
-          "referenceCategory": "SECURITY",
-          "referenceType": "cpe23Type",
-          "referenceLocator": "cpe:2.3:a:\\@ampproject\\/remapping:\\@ampproject\\/remapping:2.2.1:*:*:*:*:*:*:*"
-        },
-        {
-          "referenceCategory": "PACKAGE-MANAGER",
-          "referenceType": "purl",
-          "referenceLocator": "pkg:npm/%40ampproject/[email protected]"
-        }
-      ]
-    }
-  ]
-}
+    "spdxVersion": "SPDX-2.3",
+    "dataLicense": "CC0-1.0",
+    "SPDXID": "SPDXRef-DOCUMENT",
+    "name": "./",
+    "documentNamespace": "https://anchore.com/syft/dir/80b363b6-87f4-4162-853f-60d402537d20",
+    "creationInfo": {
+      "licenseListVersion": "3.22",
+      "creators": [
+        "Organization: Anchore, Inc",
+        "Tool: syft-0.103.1"
+      ],
+      "created": "2024-01-31T18:22:50Z"
+    },
+    "packages": [
+      {
+        "name": "@ampproject/remapping",
+        "SPDXID": "SPDXRef-Package-npm--ampproject-remapping-5266573ba4f24a42",
+        "versionInfo": "2.2.1",
+        "supplier": "NOASSERTION",
+        "downloadLocation": "NOASSERTION",
+        "filesAnalyzed": false,
+        "sourceInfo": "acquired package info from installed node module manifest file: /yarn.lock",
+        "licenseConcluded": "NOASSERTION",
+        "licenseDeclared": "Apache-2.0",
+        "copyrightText": "NOASSERTION",
+        "externalRefs": [
+          {
+            "referenceCategory": "SECURITY",
+            "referenceType": "cpe23Type",
+            "referenceLocator": "cpe:2.3:a:\\@ampproject\\/remapping:\\@ampproject\\/remapping:2.2.1:*:*:*:*:*:*:*"
+          },
+          {
+            "referenceCategory": "PACKAGE-MANAGER",
+            "referenceType": "purl",
+            "referenceLocator": "pkg:npm/%40ampproject/[email protected]"
+          }
+        ]
+      }
+    ]
+}
@@ -0,0 +1,17 @@
+/**
+ * Unit tests for the action's entrypoint, src/index.ts
+ */
+
+import * as main from '../src/main'
+
+// Mock the action's entrypoint
+const runMock = jest.spyOn(main, 'run').mockImplementation()
+
+describe('index', () => {
+  it('calls run when imported', async () => {
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    require('../src/index')
+
+    expect(runMock).toHaveBeenCalled()
+  })
+})
@@ -0,0 +1,112 @@
+import * as core from '@actions/core'
+import * as main from '../src/main'
+import * as fs from 'fs'
+import os from 'os'
+import * as path from 'path'
+
+// Mock the GitHub Actions core library
+jest.mock('@actions/core')
+const getInputMock = jest.spyOn(core, 'getInput')
+const setOutputMock = jest.spyOn(core, 'setOutput')
+const setFailedMock = jest.spyOn(core, 'setFailed')
+
+// Ensure that setFailed doesn't set an exit code during tests
+setFailedMock.mockImplementation(() => {})
+
+describe('SBOM Action', () => {
+  let tempDir = '/'
+  let outputs = {} as Record<string, string>
+
+  beforeEach(() => {
+    tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'sbom'))
+
+    jest.resetAllMocks()
+    setOutputMock.mockImplementation((key, value) => {
+      outputs[key] = value
+    })
+  })
+
+  afterEach(() => {
+    fs.rmdirSync(tempDir, { recursive: true })
+    outputs = {}
+  })
+
+  it('successfully processes an SBOM', async () => {
+    const spdxSBOM = JSON.stringify({
+      spdxVersion: 'SPDX-2.2',
+      SPDXID: 'SPDXRef-DOCUMENT',
+      packages: []
+    })
+    const filePath = path.join(tempDir, 'spdxSBOM.json')
+    fs.writeFileSync(filePath, spdxSBOM)
+
+    const inputs = {
+      'sbom-path': filePath
+    }
+    getInputMock.mockImplementation(mockInput(inputs))
+    const originalEnv = process.env
+    process.env = { ...originalEnv, RUNNER_TEMP: '/tmp' }
+
+    // Run the main function
+    await main.run()
+
+    // Verify that outputs were set correctly
+    expect(setOutputMock).toHaveBeenCalledTimes(2)
+    expect(setOutputMock).toHaveBeenNthCalledWith(
+      2,
+      'predicate-type',
+      'https://spdx.dev/Document/v2.2'
+    )
+    expect(outputs['predicate-path']).toBeTruthy()
+    const predicatePath = outputs['predicate-path']
+
+    // Verify that the temporary file exists
+    expect(fs.existsSync(predicatePath)).toBe(true)
+
+    // Read the content of the temporary file
+    const fileContent = fs.readFileSync(predicatePath, 'utf-8')
+
+    // Verify that the content matches the predicate params
+    expect(JSON.parse(fileContent)).toEqual(JSON.parse(spdxSBOM))
+
+    // Clean up the temporary file
+    fs.unlinkSync(predicatePath)
+
+    process.env = originalEnv
+  })
+
+  it('fails when an error occurs without input', async () => {
+    await main.run()
+    expect(setFailedMock).toHaveBeenCalledWith(
+      'TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string or an instance of Buffer or URL. Received undefined'
+    )
+  })
+
+  it('fails when an error occurs with wrong sbom format', async () => {
+    const spdxSBOM = JSON.stringify({
+      SPDXID: 'SPDXRef-DOCUMENT'
+    })
+    const filePath = path.join(tempDir, 'spdxSBOM.json')
+    fs.writeFileSync(filePath, spdxSBOM)
+
+    const inputs = {
+      'sbom-path': filePath
+    }
+    getInputMock.mockImplementation(mockInput(inputs))
+    const originalEnv = process.env
+    process.env = { ...originalEnv, RUNNER_TEMP: '/tmp' }
+
+    // Run the main function
+    await main.run()
+    expect(setFailedMock).toHaveBeenCalledWith('Unsupported SBOM format')
+  })
+})
+
+function mockInput(inputs: Record<string, string>): typeof core.getInput {
+  return (name: string): string => {
+    if (name in inputs) {
+      return inputs[name]
+    }
+    return ''
+  }
+}
@@ -0,0 +1,125 @@
+import {
+  storePredicate,
+  parseSBOMFromPath,
+  generateSBOMPredicate,
+  SBOM
+} from '../src/sbom'
+import type { Predicate } from '@actions/attest'
+import * as fs from 'fs'
+import os from 'os'
+import * as path from 'path'
+
+describe('parseSBOMFromPath', () => {
+  let tempDir = '/'
+
+  beforeEach(() => {
+    tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'sbom'))
+  })
+
+  afterEach(() => {
+    fs.rmdirSync(tempDir, { recursive: true })
+  })
+
+  it('correctly parses an SPDX file', async () => {
+    const spdxSBOM = JSON.stringify({
+      spdxVersion: 'SPDX-2.2',
+      SPDXID: 'SPDXRef-DOCUMENT'
+    })
+    const filePath = path.join(tempDir, 'spdxSBOM.json')
+    fs.writeFileSync(filePath, spdxSBOM)
+    await expect(parseSBOMFromPath(filePath)).resolves.toEqual({
+      type: 'spdx',
+      object: JSON.parse(spdxSBOM)
+    })
+  })
+
+  it('correctly parses a CycloneDX file', async () => {
+    const cycloneDXSBOM = JSON.stringify({
+      bomFormat: 'CycloneDX',
+      serialNumber: '123',
+      specVersion: '1.2'
+    })
+    const filePath = path.join(tempDir, 'cyclonedxSBOM.json')
+    fs.writeFileSync(filePath, cycloneDXSBOM)
+
+    await expect(parseSBOMFromPath(filePath)).resolves.toEqual({
+      type: 'cyclonedx',
+      object: JSON.parse(cycloneDXSBOM)
+    })
+  })
+
+  it('throws an error for unsupported SBOM formats', async () => {
+    const filePath = path.join(tempDir, 'random.json')
+    fs.writeFileSync(filePath, JSON.stringify({ random: 'value' }))
+    await expect(parseSBOMFromPath(filePath)).rejects.toThrow(
+      'Unsupported SBOM format'
+    )
+  })
+})
+
+describe('storePredicate', () => {
+  it('should store the predicate to a temporary file', () => {
+    const predicate = { params: { key: 'value' } } as Predicate
+
+    // Mocking the process.env['RUNNER_TEMP'] value
+    const originalEnv = process.env
+    process.env = { ...originalEnv, RUNNER_TEMP: '/tmp' }
+
+    const tempFile = storePredicate(predicate)
+
+    // Verify that the temporary file exists
+    expect(fs.existsSync(tempFile)).toBe(true)
+
+    // Read the content of the temporary file
+    const fileContent = fs.readFileSync(tempFile, 'utf-8')
+
+    // Verify that the content matches the predicate params
+    expect(JSON.parse(fileContent)).toEqual(predicate.params)
+
+    // Clean up the temporary file
+    fs.unlinkSync(tempFile)
+
+    // Restore the original process.env
+    process.env = originalEnv
+  })
+
+  it('should throw an error if RUNNER_TEMP environment variable is missing', () => {
+    const predicate = { params: { key: 'value' } } as Predicate
+
+    // Mocking the process.env['RUNNER_TEMP'] value
+    const originalEnv = process.env
+    process.env = {}
+
+    // Verify that an error is thrown
+    expect(() => storePredicate(predicate)).toThrow(
+      'Missing RUNNER_TEMP environment variable'
+    )
+
+    // Restore the original process.env
+    process.env = originalEnv
+  })
+})
+
+describe('generateSBOMPredicate', () => {
+  it('generates SPDX predicate correctly', () => {
+    const sbom = { type: 'spdx', object: { spdxVersion: 'SPDX-2.2' } } as SBOM
+    const result = generateSBOMPredicate(sbom)
+    expect(result.type).toContain('https://spdx.dev/Document/v2.2')
+    expect(result.params).toEqual(sbom.object)
+  })
+
+  it('generates CycloneDX predicate correctly', () => {
+    const sbom = { type: 'cyclonedx', object: {} } as SBOM
+    const result = generateSBOMPredicate(sbom)
+    expect(result.type).toEqual('https://cyclonedx.org/bom')
+    expect(result.params).toEqual(sbom.object)
+  })
+
+  it('throws error for unsupported SBOM formats', () => {
+    const sbom = { type: 'spdx', object: {} }
+    // @ts-expect-error test error case
+    expect(() => generateSBOMPredicate(sbom)).toThrow(
+      'Cannot find spdxVersion in the SBOM'
+    )
+  })
+})
@@ -9,31 +9,24 @@ inputs:
  subject-path:
    description: >
      Path to the artifact serving as the subject of the attestation. Must
-      specify exactly one of "subject-path", "subject-digest", or
-      "subject-checksums". May contain a glob pattern or list of paths (total
-      subject count cannot exceed 1024).
+      specify exactly one of "subject-path" or "subject-digest".
    required: false
  subject-digest:
    description: >
      SHA256 digest of the subject for the attestation. Must be in the form
      "sha256:hex_digest" (e.g. "sha256:abc123..."). Must specify exactly one of
-      "subject-path", "subject-digest", or "subject-checksums".
+      "subject-path" or "subject-digest".
    required: false
  subject-name:
    description: >
-      Subject name as it should appear in the attestation. Required when
-      identifying the subject with the "subject-digest" input.
-  subject-checksums:
-    description: >
-      Path to checksums file containing digest and name of subjects for
-      attestation. Must specify exactly one of "subject-path", "subject-digest",
-      or "subject-checksums".
-    required: false
+      Subject name as it should appear in the attestation. Required unless
+      "subject-path" is specified, in which case it will be inferred from the
+      path.
  sbom-path:
    description: >
-      Path to the JSON-formatted SBOM file to attest. File size cannot exceed
-      16MB.
-    required: true
+      Path to the JSON-formatted SBOM file to attest. When specified, the
+      "scan-path" and "sbom-format" inputs are ignored.
+    required: false
  push-to-registry:
    description: >
      Whether to push the provenance statement to the image registry. Requires
@@ -41,12 +34,6 @@ inputs:
      and that the "subject-digest" parameter be specified. Defaults to false.
    default: false
    required: false
-  show-summary:
-    description: >
-      Whether to attach a list of generated attestations to the workflow run
-      summary page. Defaults to true.
-    default: true
-    required: false
  github-token:
    description: >
      The GitHub token used to make authenticated API requests.
@@ -55,32 +42,25 @@ inputs:

 outputs:
  bundle-path:
-    description: 'The path to the file containing the attestation bundle.'
+    description: 'The path to the file containing the attestation bundle(s).'
    value: ${{ steps.attest.outputs.bundle-path }}
-  attestation-id:
-    description: 'The ID of the attestation.'
-    value: ${{ steps.attest.outputs.attestation-id }}
-  attestation-url:
-    description: 'The URL for the attestation summary.'
-    value: ${{ steps.attest.outputs.attestation-url }}

 runs:
  using: 'composite'
  steps:
-    - shell: bash
-      run: |
-        echo "::warning::actions/attest-sbom has been deprecated, please use actions/attest instead"
-
-    - uses: actions/attest@c32b4b8b198b65d0bd9d63490e847ff7b53989d4 # v4.0.0
+    - uses: actions/attest-sbom/predicate@534423496eab34674190bc45fdacbb8b1198e07f # [email protected]
+      id: generate-sbom-predicate
+      with:
+        sbom-path: ${{ inputs.sbom-path || steps.sbom-output.outputs.path }}
+    - uses: actions/attest@bdehamer/skip-attestation-store
      id: attest
-      env:
-        NODE_OPTIONS: '--max-http-header-size=32768'
      with:
        subject-path: ${{ inputs.subject-path }}
        subject-digest: ${{ inputs.subject-digest }}
        subject-name: ${{ inputs.subject-name }}
-        subject-checksums: ${{ inputs.subject-checksums }}
-        sbom-path: ${{ inputs.sbom-path }}
+        predicate-type:
+          ${{ steps.generate-sbom-predicate.outputs.predicate-type }}
+        predicate-path:
+          ${{ steps.generate-sbom-predicate.outputs.predicate-path }}
        push-to-registry: ${{ inputs.push-to-registry }}
-        show-summary: ${{ inputs.show-summary }}
        github-token: ${{ inputs.github-token }}
@@ -0,0 +1,120 @@
+@actions/core
+MIT
+The MIT License (MIT)
+
+Copyright 2019 GitHub
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+@actions/http-client
+MIT
+Actions Http Client for Node.js
+
+Copyright (c) GitHub, Inc.
+
+All rights reserved.
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+associated documentation files (the "Software"), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
+LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+@fastify/busboy
+MIT
+Copyright Brian White. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+
+tunnel
+MIT
+The MIT License (MIT)
+
+Copyright (c) 2012 Koichi Kobayashi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+
+undici
+MIT
+MIT License
+
+Copyright (c) Matteo Collina and Undici contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
+uuid
+MIT
+The MIT License (MIT)
+
+Copyright (c) 2010-2020 Robert Kieffer and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
@@ -0,0 +1 @@
+process.stdout.write = jest.fn()
@@ -0,0 +1,94 @@
+{
+  "name": "actions/attest-sbom",
+  "description": "Generate signed SBOM attestations",
+  "version": "1.0.0",
+  "author": "",
+  "private": true,
+  "homepage": "https://github.com/actions/attest-sbom",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/actions/attest-sbom.git"
+  },
+  "bugs": {
+    "url": "https://github.com/actions/attest-sbom/issues"
+  },
+  "keywords": [
+    "actions",
+    "attestation",
+    "sbom"
+  ],
+  "exports": {
+    ".": "./dist/index.js"
+  },
+  "engines": {
+    "node": ">=20"
+  },
+  "scripts": {
+    "bundle": "npm run format:write && npm run package",
+    "ci-test": "jest",
+    "format:write": "prettier --write **/*.ts",
+    "format:check": "prettier --check **/*.ts",
+    "lint:eslint": "npx eslint . -c ./.github/linters/.eslintrc.yml",
+    "lint:markdown": "npx markdownlint --config .github/linters/.markdown-lint.yml \"*.md\"",
+    "lint": "npm run lint:eslint && npm run lint:markdown",
+    "package": "ncc build src/index.ts --license licenses.txt",
+    "package:watch": "npm run package -- --watch",
+    "test": "jest",
+    "all": "npm run format:write && npm run lint && npm run test && npm run package"
+  },
+  "license": "MIT",
+  "jest": {
+    "preset": "ts-jest",
+    "verbose": true,
+    "clearMocks": true,
+    "testEnvironment": "node",
+    "moduleFileExtensions": [
+      "js",
+      "ts"
+    ],
+    "setupFilesAfterEnv": [
+      "./jest.setup.js"
+    ],
+    "testMatch": [
+      "**/*.test.ts"
+    ],
+    "testPathIgnorePatterns": [
+      "/node_modules/",
+      "/dist/"
+    ],
+    "transform": {
+      "^.+\\.ts$": "ts-jest"
+    },
+    "coverageReporters": [
+      "json-summary",
+      "text",
+      "lcov"
+    ],
+    "collectCoverage": true,
+    "collectCoverageFrom": [
+      "./src/**"
+    ]
+  },
+  "dependencies": {
+    "@actions/core": "^1.10.1"
+  },
+  "devDependencies": {
+    "@actions/attest": "^1.2.1",
+    "@types/jest": "^29.5.12",
+    "@types/node": "^20.12.12",
+    "@typescript-eslint/eslint-plugin": "^7.10.0",
+    "@typescript-eslint/parser": "^7.10.0",
+    "@vercel/ncc": "^0.38.1",
+    "eslint": "^8.57.0",
+    "eslint-plugin-github": "^4.10.2",
+    "eslint-plugin-jest": "^28.5.0",
+    "eslint-plugin-jsonc": "^2.16.0",
+    "eslint-plugin-prettier": "^5.1.3",
+    "jest": "^29.7.0",
+    "markdownlint-cli": "^0.41.0",
+    "prettier": "^3.2.5",
+    "prettier-eslint": "^16.3.0",
+    "ts-jest": "^29.1.3",
+    "typescript": "^5.4.5"
+  }
+}
@@ -0,0 +1,19 @@
+name: 'SBOM Predicate'
+description: 'Generate predicate for SBOM attestations'
+author: 'GitHub'
+
+inputs:
+  sbom-path:
+    description: >
+      Path to the SBOM file to generate sbom statement
+    required: false
+outputs:
+  predicate-path:
+    description: >
+      The path to the JSON-serialized of the attestation predicate
+  predicate-type:
+    description: >
+      URI identifying the type of the predicate.
+runs:
+  using: node20
+  main: ../dist/index.js
@@ -0,0 +1,7 @@
+/**
+ * The entrypoint for the action.
+ */
+import { run } from './main'
+
+// eslint-disable-next-line @typescript-eslint/no-floating-promises
+run()
@@ -0,0 +1,31 @@
+import * as core from '@actions/core'
+import {
+  parseSBOMFromPath,
+  storePredicate,
+  generateSBOMPredicate
+} from './sbom'
+
+/**
+ * The main function for the action.
+ * @returns {Promise<void>} Resolves when the action is complete.
+ */
+export async function run(): Promise<void> {
+  try {
+    const sbomPath = core.getInput('sbom-path')
+
+    core.debug(`Reading SBOM from ${sbomPath}`)
+    const sbom = await parseSBOMFromPath(sbomPath)
+
+    // Calculate subject from inputs and generate provenance
+    const predicate = generateSBOMPredicate(sbom)
+
+    const predicatePath = storePredicate(predicate)
+
+    core.setOutput('predicate-path', predicatePath)
+    core.setOutput('predicate-type', predicate.type)
+  } catch (err) {
+    const error = err instanceof Error ? err : new Error(`${err}`)
+    // Fail the workflow run if an error occurs
+    core.setFailed(error.message)
+  }
+}
@@ -0,0 +1,99 @@
+import fs from 'fs'
+import * as path from 'path'
+
+import type { Predicate } from '@actions/attest'
+
+export type SBOM = {
+  type: 'spdx' | 'cyclonedx'
+  object: object
+}
+
+export async function parseSBOMFromPath(filePath: string): Promise<SBOM> {
+  // Read the file content
+  const fileContent = await fs.promises.readFile(filePath, 'utf8')
+
+  const sbom = JSON.parse(fileContent)
+
+  if (checkIsSPDX(sbom)) {
+    return { type: 'spdx', object: sbom }
+  } else if (checkIsCycloneDX(sbom)) {
+    return { type: 'cyclonedx', object: sbom }
+  }
+  throw new Error('Unsupported SBOM format')
+}
+
+function checkIsSPDX(sbomObject: {
+  spdxVersion?: string
+  SPDXID?: string
+}): boolean {
+  if (sbomObject?.spdxVersion && sbomObject?.SPDXID) {
+    return true
+  } else {
+    return false
+  }
+}
+
+function checkIsCycloneDX(sbomObject: {
+  bomFormat?: string
+  serialNumber?: string
+  specVersion?: string
+}): boolean {
+  if (
+    sbomObject?.bomFormat &&
+    sbomObject?.serialNumber &&
+    sbomObject?.specVersion
+  ) {
+    return true
+  } else {
+    return false
+  }
+}
+
+export const storePredicate = (predicate: Predicate): string => {
+  // random tempfile
+  const basePath = process.env['RUNNER_TEMP']
+
+  if (!basePath) {
+    throw new Error('Missing RUNNER_TEMP environment variable')
+  }
+
+  const tmpDir = fs.mkdtempSync(path.join(basePath, path.sep))
+  const tempFile = path.join(tmpDir, 'predicate.json')
+
+  // write predicate to file
+  fs.writeFileSync(tempFile, JSON.stringify(predicate.params))
+  return tempFile
+}
+
+export const generateSBOMPredicate = (sbom: SBOM): Predicate => {
+  if (sbom.type === 'spdx') {
+    return generateSPDXIntoto(sbom.object)
+  }
+  if (sbom.type === 'cyclonedx') {
+    return generateCycloneDXIntoto(sbom.object)
+  }
+  throw new Error('Unsupported SBOM format')
+}
+
+// ref: https://github.com/in-toto/attestation/blob/main/spec/predicates/spdx.md
+const generateSPDXIntoto = (sbom: object): Predicate => {
+  const spdxVersion = (sbom as { spdxVersion?: string })?.['spdxVersion']
+  if (!spdxVersion) {
+    throw new Error('Cannot find spdxVersion in the SBOM')
+  }
+
+  const version = spdxVersion.split('-')[1]
+
+  return {
+    type: `https://spdx.dev/Document/v${version}`,
+    params: sbom
+  }
+}
+
+// ref: https://github.com/in-toto/attestation/blob/main/spec/predicates/cyclonedx.md
+const generateCycloneDXIntoto = (sbom: object): Predicate => {
+  return {
+    type: 'https://cyclonedx.org/bom',
+    params: sbom
+  }
+}
@@ -0,0 +1,19 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "rootDir": "./src",
+    "moduleResolution": "NodeNext",
+    "baseUrl": "./",
+    "sourceMap": true,
+    "outDir": "./dist",
+    "noImplicitAny": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "newLine": "lf"
+  },
+  "exclude": ["./dist", "./node_modules", "./__tests__", "./coverage"]
+}