diff options
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/cipher-builtin.c.inc | 40 |
1 files changed, 12 insertions, 28 deletions
diff --git a/crypto/cipher-builtin.c.inc b/crypto/cipher-builtin.c.inc index 1444139f36..e2ae5d090c 100644 --- a/crypto/cipher-builtin.c.inc +++ b/crypto/cipher-builtin.c.inc @@ -80,21 +80,13 @@ static void qcrypto_cipher_aes_ecb_encrypt(const AES_KEY *key, { const uint8_t *inptr = in; uint8_t *outptr = out; + + /* We have already verified that len % AES_BLOCK_SIZE == 0. */ while (len) { - if (len > AES_BLOCK_SIZE) { - AES_encrypt(inptr, outptr, key); - inptr += AES_BLOCK_SIZE; - outptr += AES_BLOCK_SIZE; - len -= AES_BLOCK_SIZE; - } else { - uint8_t tmp1[AES_BLOCK_SIZE], tmp2[AES_BLOCK_SIZE]; - memcpy(tmp1, inptr, len); - /* Fill with 0 to avoid valgrind uninitialized reads */ - memset(tmp1 + len, 0, sizeof(tmp1) - len); - AES_encrypt(tmp1, tmp2, key); - memcpy(outptr, tmp2, len); - len = 0; - } + AES_encrypt(inptr, outptr, key); + inptr += AES_BLOCK_SIZE; + outptr += AES_BLOCK_SIZE; + len -= AES_BLOCK_SIZE; } } @@ -106,21 +98,13 @@ static void qcrypto_cipher_aes_ecb_decrypt(const AES_KEY *key, { const uint8_t *inptr = in; uint8_t *outptr = out; + + /* We have already verified that len % AES_BLOCK_SIZE == 0. */ while (len) { - if (len > AES_BLOCK_SIZE) { - AES_decrypt(inptr, outptr, key); - inptr += AES_BLOCK_SIZE; - outptr += AES_BLOCK_SIZE; - len -= AES_BLOCK_SIZE; - } else { - uint8_t tmp1[AES_BLOCK_SIZE], tmp2[AES_BLOCK_SIZE]; - memcpy(tmp1, inptr, len); - /* Fill with 0 to avoid valgrind uninitialized reads */ - memset(tmp1 + len, 0, sizeof(tmp1) - len); - AES_decrypt(tmp1, tmp2, key); - memcpy(outptr, tmp2, len); - len = 0; - } + AES_decrypt(inptr, outptr, key); + inptr += AES_BLOCK_SIZE; + outptr += AES_BLOCK_SIZE; + len -= AES_BLOCK_SIZE; } } |