hash-data-using-ripemd256.yml

rule:
  meta:
    name: hash data using RIPEMD256
    namespace: data-manipulation/hashing/ripemd256
    authors:
      - raymond.leong@mandiant.com
    scope: function
    references:
      - https://en.wikipedia.org/wiki/RIPEMD-256
  features:
    - and:
      - or:
        - and:
          - description: Magic initialization constants used in RIPEMD-256
          - number: 0x67452301 = also used in MD5, SHA1, RIPEMD-128, RIPEMD-256, and RIPEMD-320
          - number: 0xEFCDAB89 = also used in MD5, SHA1, RIPEMD-128, RIPEMD-256, and RIPEMD-320
          - number: 0x98BADCFE = also used in MD5, SHA1, RIPEMD-128, RIPEMD-256, and RIPEMD-320
          - number: 0x10325476 = also used in MD5, SHA1, RIPEMD-128, RIPEMD-256, and RIPEMD-320
          - number: 0x76543210 = also used in RIPEMD-320
          - number: 0xFEDCBA98 = also used in RIPEMD-320
          - number: 0x89ABCDEF = also used in RIPEMD-320
          - number: 0x01234567 = also used in RIPEMD-320
        - bytes: 01 23 45 67 89 AB CD EF FE DC BA 98 76 54 32 10 10 32 54 76 98 BA DC FE EF CD AB 89 67 45 23 01
      - not:
        - or:
          - number: 0xC3D2E1F0 = RIPEMD-160, RIPEMD-320, SHA1 constant
          - number: 0x3C2D1E0F = RIPEMD-320 constant