This commit fixes
- bpi_cipher_encrypt to prevent before 'array subscript is
above array bounds' error
- bpi_cipher_decrypt to prevent before 'array subscript is
above array bounds' error
Fixes: d18ab45f7654 ("crypto/qat: support DOCSIS BPI mode")
Cc: [email protected]
Signed-off-by: Tomasz Jozwiak <[email protected]>
Acked-by: Fiona Trahe <[email protected]>
---
drivers/crypto/qat/qat_crypto.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/crypto/qat/qat_crypto.c b/drivers/crypto/qat/qat_crypto.c
index a572967..f85c2c8 100644
--- a/drivers/crypto/qat/qat_crypto.c
+++ b/drivers/crypto/qat/qat_crypto.c
@@ -69,6 +69,10 @@
#include "adf_transport_access_macros.h"
#define BYTE_LENGTH 8
+/* bpi is only used for partial blocks of DES and AES
+ * so AES block len can be assumed as max len for iv, src and dst
+ */
+#define BPI_MAX_ENCR_IV_LEN ICP_QAT_HW_AES_BLK_SZ
static int
qat_is_cipher_alg_supported(enum rte_crypto_cipher_algorithm algo,
@@ -121,16 +125,16 @@ bpi_cipher_encrypt(uint8_t *src, uint8_t *dst,
{
EVP_CIPHER_CTX *ctx = (EVP_CIPHER_CTX *)bpi_ctx;
int encrypted_ivlen;
- uint8_t encrypted_iv[16];
- int i;
+ uint8_t encrypted_iv[BPI_MAX_ENCR_IV_LEN];
+ uint8_t *encr = encrypted_iv;
/* ECB method: encrypt the IV, then XOR this with plaintext */
if (EVP_EncryptUpdate(ctx, encrypted_iv, &encrypted_ivlen, iv, ivlen)
<= 0)
goto cipher_encrypt_err;
- for (i = 0; i < srclen; i++)
- *(dst+i) = *(src+i)^(encrypted_iv[i]);
+ for (; srclen != 0; --srclen, ++dst, ++src, ++encr)
+ *dst = *src ^ *encr;
return 0;
@@ -150,16 +154,16 @@ bpi_cipher_decrypt(uint8_t *src, uint8_t *dst,
{
EVP_CIPHER_CTX *ctx = (EVP_CIPHER_CTX *)bpi_ctx;
int encrypted_ivlen;
- uint8_t encrypted_iv[16];
- int i;
+ uint8_t encrypted_iv[BPI_MAX_ENCR_IV_LEN];
+ uint8_t *encr = encrypted_iv;
/* ECB method: encrypt (not decrypt!) the IV, then XOR with plaintext */
if (EVP_EncryptUpdate(ctx, encrypted_iv, &encrypted_ivlen, iv, ivlen)
<= 0)
goto cipher_decrypt_err;
- for (i = 0; i < srclen; i++)
- *(dst+i) = *(src+i)^(encrypted_iv[i]);
+ for (; srclen != 0; --srclen, ++dst, ++src, ++encr)
+ *dst = *src ^ *encr;
return 0;
--
2.7.4
