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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>
This commit is contained in:
Harsh Jain 2018-01-11 16:45:50 +05:30 committed by Herbert Xu
parent 8daa32b935
commit 209897d54a
1 changed files with 6 additions and 4 deletions
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10
drivers/crypto/chelsio/chcr_algo.c Normal file → Executable file
View File

@ -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,