rules:
  - id: insecure-hashes
    message: Detected cryptographically insecure hashing function
    pattern-either:
      - pattern: "md2::Md2::new(...)"
      - pattern: "md4::Md4::new(...)"
      - pattern: "md5::Md5::new(...)"
      - pattern: "sha1::Sha1::new(...)"
    metadata:
      references:
        - https://github.com/RustCrypto/hashes
        - https://docs.rs/md2/latest/md2/
        - https://docs.rs/md4/latest/md4/
        - https://docs.rs/md5/latest/md5/
        - https://docs.rs/sha-1/latest/sha1/
      technology:
        - rust
      category: security
      cwe: "CWE-328: Use of Weak Hash"
      confidence: HIGH
      likelihood: LOW
      impact: MEDIUM
      subcategory: audit
    languages: [rust]
    severity: WARNING