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SBOM quality score - Quality metrics for your sboms

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sbomqs: Quality metrics for SBOMs

Go Reference Go Report Card OpenSSF Scorecard GitHub all releases

sbomqs is your primary tool to assess an SBOM's quality. The higher the score the more consumable your SBOMs are.

brew tap interlynk-io/interlynk
brew install sbomqs

Other installation options.

SBOM Card

SBOMCard

Usage

Quality Score for a single SBOM

sbomqs score <sbom-file>

Compliance Report: BSI TR-03183-2

sbomqs compliance -c samples/photon.spdx.json

Quality Score with a shareable link at sbombenchmark.dev

sbomqs share <sbom-file>

Example:

sbomqs share cdxgen-9.5.1_alpine-latest.cdx.json
5.9	cdxgen-9.5.1_alpine-latest.cdx.json
ShareLink: https://sbombenchmark.dev/user/score?id=a97af1bf-4c9d-4a55-8524-3d4bcee0b9a4

Quality Score for your dependency track projects

sbomqs dtrackScore  -u <dt-host-url> -k <dt-api-key> <project-uuid>

Example:

sbomqs dtrackScore  -u "http://localhost:8080/" -k "IIcfPA9qc1F4IkQFa2FqQJoTwcfQI" bbd4434d-8062-4e59-a323-3b416701c948

alt text

Quality Score in an AirGapped Environment

INTERLYNK_DISABLE_VERSION_CHECK=true ./build/sbomqs score ~/wrk/sbom*/samples/*.json  -b

Quality Score using containers

docker run -v <path of sbom file or folder>:/app/inputfile ghcr.io/interlynk-io/sbomqs score /app/inputfile

Example

docker run -v $(pwd)/samples/sbomqs-cdx-cgomod.json:/app/inputfile ghcr.io/interlynk-io/sbomqs score -j /app/inputfile
Unable to find image 'ghcr.io/interlynk-io/sbomqs:latest' locally
latest: Pulling from interlynk-io/sbomqs
708d61464c72: Already exists
Digest: sha256:d47e3e936b3ef61c01fcf5cfd00d053c06bf1ded8c9ac3c0d148412126da3b3f
Status: Downloaded newer image for ghcr.io/interlynk-io/sbomqs:latest
{
  "run_id": "d1ccac27-323e-478a-afd2-7d33501997ea",
  "timestamp": "2023-05-23T06:11:25Z",
  "creation_info": {
    "name": "sbomqs",
    "version": "",
    "scoring_engine_version": "5"
  },

What is a high quality SBOM

A high quality SBOM should allow for managements of assets, license, vulnerabilities, Intellectual Property, configuration management and incident response.

A quality SBOM is one that is accurate, complete, and up-to-date. There are many factors that go into constructing a high quality SBOM.

  1. Identify & list all components of your product along with their transitive dependencies.
  2. List all your components along with their versions & content checksums.
  3. Include accurate component licenses.
  4. Include accurate lookup identifiers e.g. purls or CPEs.
  5. Quality SBOM depends a lot upon which stage of the lifecycle it has been generated at, we believe closer to the build time is ideal.
  6. Signed SBOMs.
  7. Should layout information based on industry standard specs like CycloneDX, SPDX and SWID.

Goals

The main goals of the utility are:

  1. Make it easy and fast to assess the quality if an SBOM, generated or acquired.
  2. Support all well-known SBOM standards.
  3. Scoring output should be customizable.
  4. Scoring output should be consumable.

Goal #1: Easy & Fast

SBOMs can be generated using both commercial and open-source tooling. As consumers of SBOMs we wanted a fast and easy way to assess the quality of an SBOM. An SBOM with a low score should be re-evaluated or rejected.

sbomqs makes getting a quick assessment effortless. Just point.

sbomqs score samples/julia.spdx.tv -b
6.9     samples/julia.spdx.json

Goal #2: SBOM Standards

The NTIA recommends these standards for SBOMs:

  • SPDX
  • CycloneDX
  • SWID

sbomqs supports SPDX and CycloneDX formats. Support for SWID is incoming.

In addition to supporting these SBOM formats, we support various formats for data representation.

  • SPDX: json, yaml, rdf and tag-value
  • CycloneDX: json and xml

Goal #3: Customizable output

sbomqs scoring output can be customized by category or by feature. We understand everyone's needs for scoring differ, hence we allow to customize which categories or features should rsp. should not be included for scoring.

Category scoring

We have categorized our current features as follows:

  • NTIA-minimum-elements: Includes features, which help you to quickly understand if an SBOM complies with NTIA's minimum element guidelines.
  • Structural: Checks if an SBOM complies with the underlying specifications, be it SPDX or CycloneDX.
  • Semantic: Checks meaning of SBOM fields specific to their standard.
  • Quality: Helps to determine the quality of the data in an SBOM.
  • Sharing: Helps to determine if an SBOM can be shared.
  • OWASP BOM Maturity Model: Work in progress

Feature Scoring

We allow running any single feature to be tested against an SBOM.

  1. sbomqs generate features generates a features.yaml file.
  2. Open the features.yaml file and select the categories or features that you want to be enabled.
  3. Save and close the file.
  4. sbomqs score ~/data/app.spdx.json --configpath features.yaml use the features.yaml file to apply the changes.

For the list of features currently supported, visit features.md.

Goal #4: Consumable output

sbomqs provides its scoring output in basic and detailed forms.

The basic output is great for a quick check of the quality of an SBOMs. Once you get a good sense of how the tool works, this can also becom the primary way of consuming data from this tool.

6.0     samples/blogifier-dotnet-SBOM.json
6.9     samples/julia.spdx.json
7.6     samples/sbom.spdx.yaml

Detailed output is presented in tabular and json formats, currently:

Tabular format: this format has been inspired by oss scorecard project.

SBOM Quality Score: 6.0 samples/blogifier-dotnet-SBOM.json
+-----------------------+--------------------------------+-----------+--------------------------------+
|       CATEGORY        |            FEATURE             |   SCORE   |              DESC              |
+-----------------------+--------------------------------+-----------+--------------------------------+
| NTIA-minimum-elements | Doc has creation timestamp     | 10.0/10.0 | doc has creation timestamp     |
|                       |                                |           | 2022-11-04T16:51:54Z           |
+                       +--------------------------------+-----------+--------------------------------+
|                       | Components have supplier names | 0.0/10.0  | 0/1649 have supplier names     |
+                       +--------------------------------+-----------+--------------------------------+
|                       | Components have names          | 10.0/10.0 | 1649/1649 have names           |
+                       +--------------------------------+-----------+--------------------------------+
|                       | Doc has relationships          | 0.0/10.0  | doc has 0 relationships        |
+                       +--------------------------------+-----------+--------------------------------+
...
...

json format

{
  "run_id": "fc86a94d-7490-4f20-a202-b04bb3cdfde9",
  "timestamp": "2023-02-17T14:58:55Z",
  "creation_info": {
    "name": "sbomqs",
    "version": "v0.0.6-3-g248d059",
    "scoring_engine_version": "1"
  },
  "files": [
    {
      "file_name": "samples/blogifier-dotnet-SBOM.json",
      "spec": "cyclonedx",
      "spec_version": "1.4",
      "file_format": "json",
      "avg_score": 6,
      "num_components" : 3,
      "scores": [
        {
          "category": "Structural",
          "feature": "Spec File Format",
          "score": 10,
          "max_score": 10,
          "description": "provided sbom should be in supported file format for spec: json and version: json,xml"
        }
      ]
    }
  ]
}

Compliance Reports

sbomqs can produce compliance reports for industry standard requirements. Currently we support BSI TR-03183-2 v1.1. More details about its requirements are avaliable here.

Reports

Example of a BSI report

{
  "report_name": "Cyber Resilience Requirements for Manufacturers and Products Report",
  "subtitle": "Part 2: Software Bill of Materials (SBOM)",
  "revision": "TR-03183-2 (1.1)",
  "run": {
    "id": "375c288b-0928-4066-9e3a-b8655ac29f91",
    "generated_at": "2024-04-18T03:22:56Z",
    "file_name": "samples/photon.spdx.json"
  },
  "tool": {
    "name": "sbomqs",
    "version": "v0.0.30-23-g344a584-dirty",
    "vendor": "Interlynk (https://interlynk.io)"
  },
  "summary": {
    "total_score": 4.20,
    "max_score": 10,
    "required_elements_score": 5.91,
    "optional_elements_score": 2.50
  },
"sections": [
    {
      "section_title": "SBOM formats",
      "section_id": "4",
      "section_data_field": "specification",
      "required": true,
      "element_id": "sbom",
      "element_result": "spdx",
      "score": 10
    },
...

SBOM Samples

  • A sample set of SBOMs is present in the samples directory above
  • SBOM Benchmark is a repository of SBOM and quality score for most popular containers and repositories
  • SBOM Explorer is a command line utility to search and pull SBOMs
  • SBOM Assembler is a command line utility for assembling SBOMs into product SBOMs

Installation

Using Prebuilt binaries

https://github.com/interlynk-io/sbomqs/releases

Using Homebrew

brew tap interlynk-io/interlynk
brew install sbomqs

Using Go install

go install github.com/interlynk-io/sbomqs@latest

Using repo

This approach involves cloning the repo and building it.

  1. Clone the repo git clone [email protected]:interlynk-io/sbomqs.git
  2. cd into sbomqs folder
  3. make build
  4. To test if the build was successful run the following command ./build/sbomqs version

Contributions

We look forward to your contributions, below are a few guidelines on how to submit them:

  • Fork the repo
  • Create your feature/bug branch (git checkout -b feature/new-feature)
  • Commit your changes (git commit -am "awesome new feature")
  • Push your changes (git push origin feature/new-feature)
  • Create a new pull-request

Other Open Source Software tools for SBOMs

  • SBOM Assembler - A tool to compose a single SBOM by combining other SBOMs or parts of them
  • SBOM Quality Score - A tool for evaluating the quality and completeness of SBOMs
  • SBOM Search Tool - A tool to grep style semantic search in SBOMs
  • SBOM Explorer - A tool for discovering and downloading SBOMs from a public repository

Contact

We appreciate all feedback. The best ways to get in touch with us:

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SBOM quality score - Quality metrics for your sboms

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