def pkcs7.diff

bend-osdev-cipher-modes@0.1.0.0 · pkcs7.bend:42

import Base
import bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend as M

42# 0 when every byte of xs is v
43def pkcs7.diff(xs: List<&2, U32>, +v: U32, acc: U32) -> U32:
44  match xs:
45    case Nil{}:
46      acc
47    case Con{h, t}:
48      pkcs7.diff(t, v, U32.or(acc, U32.xor(M.cm.byte(h), v)))