def cast.sub

bend-osdev-legacy-ciphers@0.1.0.0 · cast5.bend:411

import Base

411# a subkey: S5[a] ^ S6[b] ^ S7[c] ^ S8[d] ^ Sj[e] on the bytes of v
412def cast.sub(+t: LcCastKTabs, +v: List<&2, U32>, ia: Nat, ib: Nat, ic: Nat, id: Nat, j: Nat, ie: Nat) -> U32:
413  U32.xor(U32.xor(U32.xor(cast.ks(t, 5n, v, ia), cast.ks(t, 6n, v, ib)), U32.xor(cast.ks(t, 7n, v, ic), cast.ks(t, 8n, v, id))), cast.ks(t, j, v, ie))