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Fix sm4 iv bug

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FIXME: v3.2.0
This commit is contained in:
Zhi Guan
2026-06-22 16:19:11 +08:00
parent 14221eaeea
commit d5de748e45
7 changed files with 107 additions and 21 deletions
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7
src/sm4_ce.c
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@@ -155,15 +155,18 @@ void sm4_cbc_encrypt_blocks(const SM4_KEY *key, uint8_t iv[16],
void sm4_cbc_decrypt_blocks(const SM4_KEY *key, uint8_t iv[16],
const uint8_t *in, size_t nblocks, uint8_t *out)
{
const uint8_t *piv = iv;
uint8_t piv[16];
uint8_t next_iv[16];
memcpy(piv, iv, 16);
while (nblocks--) {
size_t i;
memcpy(next_iv, in, 16);
sm4_encrypt(key, in, out);
for (i = 0; i < 16; i++) {
out[i] ^= piv[i];
}
piv = in;
memcpy(piv, next_iv, 16);
in += 16;
out += 16;
}