Commit 90cc4091 authored by Andy Polyakov's avatar Andy Polyakov
Browse files

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

parent a7201e9a

crypto/aes/aes_cbc.c

+4 −2
Original line number Diff line number Diff line
@@ -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);

		}

	}