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Don't zap AES CBC IV, when decrypting truncated content in place.

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This commit is contained in:
Andy Polyakov 2005-01-18 00:26:52 +00:00
parent a7201e9a1b
commit 90cc40911b
1 changed files with 4 additions and 2 deletions
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6
crypto/aes/aes_cbc.c
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@ -120,9 +120,11 @@ void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
}
if (len) {
memcpy(tmp, in, AES_BLOCK_SIZE);
AES_decrypt(tmp, tmp, key);
AES_decrypt(tmp, out, key);
for(n=0; n < len; ++n)
out[n] = tmp[n] ^ ivec[n];
out[n] ^= ivec[n];
for(n=len; n < AES_BLOCK_SIZE; ++n)
out[n] = tmp[n];
memcpy(ivec, tmp, AES_BLOCK_SIZE);
}
}