hash-data-using-ripemd128.yml

rule:
  meta:
    name: hash data using RIPEMD128
    namespace: data-manipulation/hashing/ripemd128
    authors:
      - raymond.leong@mandiant.com
    scope: file
    references:
      - https://en.wikipedia.org/wiki/RIPEMD-128
  features:
    - and:
      - function:
        - and:
          - or:
            - and:
              - description: Magic initialization constants used in RIPEMD-128
              - 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
            - bytes: 01 23 45 67 89 AB CD EF FE DC BA 98 76 54 32 10
          - not:
            - or:
              - number: 0x76543210 = RIPEMD-256 and RIPEMD-320 constant
              - number: 0xFEDCBA98 = RIPEMD-256 and RIPEMD-320 constant
              - number: 0xC3D2E1F0 = RIPEMD-160, RIPEMD-320, SHA1 constant
              - number: 0x3C2D1E0F = RIPEMD-320 constant
      - function:
        - and:
          - description: Magic K-array constants not present in MD5
          - number: 0xA953FD4E
          - number: 0x50A28BE6
          - number: 0x5C4DD124
          - number: 0x6D703EF3