Commit 209897d5 authored by Harsh Jain's avatar Harsh Jain Committed by Herbert Xu
Browse files

crypto: chelsio - Fix IV updated in XTS operation 



Skip decrypt operation on IV received from HW for last request.

Signed-off-by: default avatarHarsh Jain <harsh@chelsio.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 8daa32b9

drivers/crypto/chelsio/chcr_algo.c

100644 → 100755
+6 −4
Original line number Diff line number Diff line
@@ -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));
@@ -1044,6 +1045,7 @@ 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);



	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,