def pcbc_rt.cast5

bend-osdev-crypto@0.1.0.0 · PROOF.bend:1418

import Base
import bend-osdev-legacy-ciphers@0.1.0.0/legacy_ciphers.bend as L
import bend-osdev-legacy-ciphers@0.1.0.0/cast5.bend as C5
import bend-osdev-legacy-ciphers@0.1.0.0/LAWS.bend as LL
import bend-osdev-crypto@0.1.0.0/pcbc.bend as Pc
import bend-osdev-crypto@0.1.0.0/inst_lc.bend as LC

1418def pcbc_rt.cast5(+k: C5.LcCast5Key, bs: List<&2, L.LcBlock64>, +iv: L.LcBlock64) -> {bs == Pc.cr.pcbc.dec(~C5.LcCast5Key, ~L.LcBlock64, ~C5.LcCast5.decrypt, ~LC.CrBlk64.xor, k, Pc.cr.pcbc.enc(~C5.LcCast5Key, ~L.LcBlock64, ~C5.LcCast5.encrypt, ~LC.CrBlk64.xor, k, bs, iv), iv) : List<&2, L.LcBlock64>}:
1419  match bs:
1420    case Nil{}:
1421      {==}
1422    case Con{+p, t}:
1423      %Equal.sym(L.LcBlock64, C5.LcCast5.decrypt(k, C5.LcCast5.encrypt(k, LC.CrBlk64.xor(p, iv))), LC.CrBlk64.xor(p, iv), LL.cast5_round_trip(k, LC.CrBlk64.xor(p, iv))) : {Con{p, t} == Con{LC.CrBlk64.xor(_, iv), Pc.cr.pcbc.dec(~C5.LcCast5Key, ~L.LcBlock64, ~C5.LcCast5.decrypt, ~LC.CrBlk64.xor, k, Pc.cr.pcbc.enc(~C5.LcCast5Key, ~L.LcBlock64, ~C5.LcCast5.encrypt, ~LC.CrBlk64.xor, k, t, LC.CrBlk64.xor(p, C5.LcCast5.encrypt(k, LC.CrBlk64.xor(p, iv)))), LC.CrBlk64.xor(LC.CrBlk64.xor(_, iv), C5.LcCast5.encrypt(k, LC.CrBlk64.xor(p, iv))))} : List<&2, L.LcBlock64>}
1424      %lcblock64_xx(p, iv) : {Con{p, t} == Con{_, Pc.cr.pcbc.dec(~C5.LcCast5Key, ~L.LcBlock64, ~C5.LcCast5.decrypt, ~LC.CrBlk64.xor, k, Pc.cr.pcbc.enc(~C5.LcCast5Key, ~L.LcBlock64, ~C5.LcCast5.encrypt, ~LC.CrBlk64.xor, k, t, LC.CrBlk64.xor(p, C5.LcCast5.encrypt(k, LC.CrBlk64.xor(p, iv)))), LC.CrBlk64.xor(_, C5.LcCast5.encrypt(k, LC.CrBlk64.xor(p, iv))))} : List<&2, L.LcBlock64>}
1425      %pcbc_rt.cast5(k, t, LC.CrBlk64.xor(p, C5.LcCast5.encrypt(k, LC.CrBlk64.xor(p, iv)))) : {Con{p, t} == Con{p, _} : List<&2, L.LcBlock64>}
1426      {==}