def shift_rows

bend-collections-laws-crypto@1.0.0.0 · src/crypto/aes/aes.bend:20

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/aes/types.bend as T

20# Row r moves r columns to the left.
21def shift_rows(s: T.State) -> T.State:
22  match s:
23    case T.S{T.W{a0, a1, a2, a3}, T.W{b0, b1, b2, b3}, T.W{c0, c1, c2, c3}, T.W{d0, d1, d2, d3}}:
24      T.S{T.W{a0, b1, c2, d3}, T.W{b0, c1, d2, a3}, T.W{c0, d1, a2, b3}, T.W{d0, a1, b2, c3}}