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Updated SM4 with AESENCLAST (markdown)

Sun Yimin 2023-10-10 15:25:09 +08:00
parent bd87ff88de
commit 62f04864fc
1 changed files with 1 additions and 1 deletions
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2
SM4-with-AESENCLAST.md

@ -112,7 +112,7 @@ sm4_box_aesbox_2
for i := 0; i < 16; i++ {
v := x.bytes[i]
v = a1l.bytes[v&0xf] ^ a1h.bytes[v>>4] // v = A1(x)
v = aes_sbox[v] ^ 0xf // v = AES-S(A1(x)) XOR 0x0f
v = aes_sbox[v] ^ 0xf // v = AES-S(A1(x)) XOR 0x0f, 相当于对低四位取反。
v = a2l.bytes[^v&0xf] ^ a2h.bytes[v>>4] // v = A2(AES-S(A1(x)))
x.bytes[i] = v
}