diff options
| author | Harsh Jain <harsh@chelsio.com> | 2018-01-11 16:45:50 +0530 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-01-18 22:52:28 +1100 |
| commit | 209897d54a7741522a696ec4ad463049157ca082 (patch) | |
| tree | 5dd60aeb0632081e68c7602727fa4c60a3355ec6 /drivers/crypto | |
| parent | 8daa32b9357de54eb68d78bbe668d52a83d24e71 (diff) | |
| download | linux-209897d54a7741522a696ec4ad463049157ca082.tar.gz | |
crypto: chelsio - Fix IV updated in XTS operation
Skip decrypt operation on IV received from HW for last request. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rwxr-xr-x[-rw-r--r--] | drivers/crypto/chelsio/chcr_algo.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c index 280377fc69e0..27ee92061e3d 100644..100755 --- a/drivers/crypto/chelsio/chcr_algo.c +++ b/drivers/crypto/chelsio/chcr_algo.c @@ -1017,7 +1017,8 @@ static unsigned int adjust_ctr_overflow(u8 *iv, u32 bytes) return bytes; } -static int chcr_update_tweak(struct ablkcipher_request *req, u8 *iv) +static int chcr_update_tweak(struct ablkcipher_request *req, u8 *iv, + u32 isfinal) { struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(tfm)); @@ -1044,7 +1045,8 @@ static int chcr_update_tweak(struct ablkcipher_request *req, u8 *iv) for (i = 0; i < (round % 8); i++) gf128mul_x_ble((le128 *)iv, (le128 *)iv); - crypto_cipher_decrypt_one(cipher, iv, iv); + if (!isfinal) + crypto_cipher_decrypt_one(cipher, iv, iv); out: return ret; } @@ -1065,7 +1067,7 @@ static int chcr_update_cipher_iv(struct ablkcipher_request *req, CTR_RFC3686_IV_SIZE) = cpu_to_be32((reqctx->processed / AES_BLOCK_SIZE) + 1); else if (subtype == CRYPTO_ALG_SUB_TYPE_XTS) - ret = chcr_update_tweak(req, iv); + ret = chcr_update_tweak(req, iv, 0); else if (subtype == CRYPTO_ALG_SUB_TYPE_CBC) { if (reqctx->op) sg_pcopy_to_buffer(req->src, sg_nents(req->src), iv, @@ -1096,7 +1098,7 @@ static int chcr_final_cipher_iv(struct ablkcipher_request *req, ctr_add_iv(iv, req->info, (reqctx->processed / AES_BLOCK_SIZE)); else if (subtype == CRYPTO_ALG_SUB_TYPE_XTS) - ret = chcr_update_tweak(req, iv); + ret = chcr_update_tweak(req, iv, 1); else if (subtype == CRYPTO_ALG_SUB_TYPE_CBC) { if (reqctx->op) sg_pcopy_to_buffer(req->src, sg_nents(req->src), iv, |