feat: citi hackathon code submission

[Psingle20]

This PR can be considered as a submission for the FinOS CitiHackathon.
Team members:

• Prachit Ingle Psingle20
• Shabbir Kaderi shabbirflow
• Chaitanya Deshmukh ChaitanyaD48

---

This PR solves issue #745 #788 #796 #797 #765

GITPROXY PLUGINS

We have worked on the following features :

• Sensitive Data Detection ( in files like .json, .xlsx, .csv )
• Check EXIF Metadata from Images ( .jpg, .jpeg, .tiff )
• Detection of AI/ML usage (incl. weights, models etc.)
• Vulnerability Detection using GitLeaks
• Detection of Non-Standard Cryptography Usage

---

Some Modifications for the Gitleaks and Non-Standard Cryptography Usage are required.

Sensitive Data Detection ( in files like .json, .xlsx, .csv )

Features:
This solves issue #745

• https://github.com/Psingle20/git-proxy/blob/CitiHackathon/src/proxy/processors/push-action/checkSensitiveData.js - This file contains the detection logic
• For this to work, it is required to configure proxy.config.json with the file types for which sensitive data detection is required, for ex:

    "diff": {
      "block": {
        "literals": [],
        "patterns": [],
        "providers": {},
        "proxyFileTypes": [".csv", ".xlsx", ".log", ".json"]
      }
    },

• https://github.com/Psingle20/git-proxy/blob/CitiHackathon/test/CheckSensitive.test.js - Relevant tests are mentioned in this file

---

Check EXIF Metadata from Images ( .jpg, .jpeg, .tiff )

Features:
This solves issue #796

• https://github.com/Psingle20/git-proxy/blob/CitiHackathon/src/proxy/processors/push-action/checkExifJpeg.js - This file contains the logic for EXIF Metadata retrieval and parsing.
• The user can configure proxy.config.json with the file types for which EXIF Metadata needs to be detected.

    "diff": {
      "block": {
        "literals": [],
        "patterns": [],
        "providers": {},
        "proxyFileTypes": [".jpg", ".jpeg", ".tiff"]
      }
    },

• This will block push event if sensitive metadata such as Geolocation information or Camera Make or Model ( or other sensitive information ) is detected.
• Relevant tests are described in https://github.com/Psingle20/git-proxy/blob/CitiHackathon/test/CheckExif.test.js

---

Detection of AI/ML usage (incl. weights, models etc.)

Features:
This solves issue #788

• https://github.com/Psingle20/git-proxy/blob/CitiHackathon/src/proxy/processors/push-action/checkForAiMlUsage.js - This file contains the logic for AI/ML usage detection based on file extensions of model weights, usage of popular ML libraries, common AI functions usage, configuration keys, etc.
• The user can configure proxy.config.json with the parameters for which detection needs to be carried out.

    "aiMlUsage": {
          "enabled": true,
          "blockPatterns": ["modelWeights", "largeDatasets", "aiLibraries", "configKeys", "aiFunctions"]
    }

• https://github.com/Psingle20/git-proxy/blob/CitiHackathon/test/checkAiMlUsage.test.js - Relevant tests are mentioned in this file

---

Vulnerability Detection using GitLeaks

Features:
This solves issue #765

• We have used GitLeaks to detect vulnerabilities in the codebase.
• Checks have been added in gitleaks.toml file
• The main logic of the implementation lies in https://github.com/Psingle20/git-proxy/blob/CitiHackathon/src/proxy/processors/push-action/checkForSecrets file
• The user can configure proxy.config.json to enable / disable the plugin.

    "checkForSecrets": {
      "enabled": false
    },

• A detailed report will be generated gitleaks_reports.json
• Some modifications / minor changes might be required for this to be merged.

---

Detection of Non-Standard Cryptography Usage

This solves issue #745

Features:

• The logic for non - Standard cryptography detection lies in the file https://github.com/Psingle20/git-proxy/blob/CitiHackathon/src/proxy/processors/push-action/checkCryptoImplementation.js
• Relevant tests for core functionality have been described in https://github.com/Psingle20/git-proxy/blob/CitiHackathon/test/checkCryptoImplementation.test.js
• Some modifications / minor changes might be required for this to be merged.

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[Psingle20]

@JamieSlome this PR can be considered as the official submission for Hackathon. It contains all the feature me and my team members have worked on . Please review it and let us know if any changes are required.