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def next_word

qasim-bend-kit@0.1.0.2 · proof/AES_TraceProof.bend:7

import qasim-bend-kit@0.1.0.2/proof/AES_TraceProof.bend as AESTraceProof
import Base
import qasim-bend-kit@0.1.0.2/libs/AES256GCMCore.bend as Core

7def next_word(+i: U32, rcon: U32, +words: List<&2, U32>) -> U32:
8    previous = Core.aes_word_at(words, U32.to_nat(U32.sub(i, 1)))
9    back8 = Core.aes_word_at(words, U32.to_nat(U32.sub(i, 8)))
10    part = Core.aes_key_word_kind(previous, rcon, U32.is_eq(U32.mod(i, 8), 0), U32.is_eq(U32.mod(i, 8), 4))
11    U32.xor(back8, part)

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