feat: add `cyclonedx.model.dependency.Dependency.provides`

[chistyakov]

Library Version: 7.6.1

Description:

Steps to Reproduce:

1. Use the example JSON provided in the CycloneDX bom-examples repository.
2. Run the following script:

import json
from cyclonedx.model.bom import Bom


# source: https://github.com/CycloneDX/bom-examples/blob/c0436d86cd60693f01d19fe1aacfd01e70e17036/CBOM/Example-With-Dependencies/bom.json

sample = '''{
  "bomFormat": "CycloneDX",
  "specVersion": "1.6",
  "serialNumber": "urn:uuid:3e671687-395b-41f5-a30f-a58921a69b79",
  "version": 1,
  "metadata": {
    "component": {
      "type": "application",
      "bom-ref": "acme-application",
      "name": "Acme Application",
      "version": "1.0"
    }
  },
  "components": [
    {
      "type": "cryptographic-asset",
      "bom-ref": "aes128gcm",
      "name": "AES",
      "cryptoProperties": {
        "assetType": "algorithm",
        "algorithmProperties": {
          "primitive": "ae",
          "parameterSetIdentifier": "128",
          "executionEnvironment": "software-plain-ram",
          "implementationPlatform": "x86_64",
          "certificationLevel": [ "none" ],
          "mode": "gcm",
          "cryptoFunctions": ["keygen", "encrypt", "decrypt", "tag"],
          "classicalSecurityLevel": 128,
          "nistQuantumSecurityLevel": 1
        },
        "oid": "2.16.840.1.101.3.4.1.6"
      }
    },
    {
      "type": "library",
      "bom-ref": "crypto-library",
      "name": "Crypto library",
      "version": "1.0.0"
    },
    {
      "type": "library",
      "bom-ref": "some-library",
      "name": "Some library",
      "version": "1.0.0"
    }
  ],
  "dependencies": [
    {
      "ref": "acme-application",
      "dependsOn": ["crypto-library"]
    },
    {
      "ref": "crypto-library",
      "provides": ["aes128gcm"],
      "dependsOn": ["some-library"]
    }
  ]
}'''


data = json.loads(sample)

Bom.from_json(data=data)

Observed Behavior:
The code fails with the following exception:

Traceback (most recent call last):
  ...
ValueError: Unexpected key provides/provides in data being serialized to cyclonedx.model.dependency.Dependency

Environment:

• Python version: 3.10
• Operating System: macOS
• Library version: 7.6.1

Let me know if this works!

[jkowalleck]

Not a bug, but a lack of a feature.

CycloneDX python library is a community effort, everybody is free to add the bits and pieces they need. see #633

In this case, it is the property cyclonedx.model.dependency.Dependency.provides that needs to be added.
near

cyclonedx-python-lib/cyclonedx/model/dependency.py

Line 51 in 2aea159

class Dependency:

If you are interested in providing the missing feature, please let me know.
Then, you should follow our contributing guidelines, and you may open a pullrequest to add the missing feature.

[jkowalleck]

see also: #537

[uzairchhapra]

@jkowalleck I am interested in contributing for this feature. I have started working on it and can release a PR shortly.

[jkowalleck]

@jkowalleck I am interested in contributing for this feature. I have started working on it and can release a PR shortly.

That is fantastic, @uzairchhapra .
Feel free to open a work-in-progress "draft" pullrequest early.