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crypto: chcr - Use cipher instead of Block Cipher in gcm setkey 

1 Block of encrption can be done with aes-generic. no need of
cbc(aes). This patch replaces cbc(aes-generic) with aes-generic.

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 2017-01-27 16:09:08 +05:30 committed by Herbert Xu
parent ee3bd84f55
commit 8356ea515b
1 changed files with 9 additions and 11 deletions
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20
drivers/crypto/chelsio/chcr_algo.c
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@ -2189,8 +2189,7 @@ static int chcr_gcm_setkey(struct crypto_aead *aead, const u8 *key,
struct chcr_context *ctx = crypto_aead_ctx(aead);
struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx);
struct chcr_gcm_ctx *gctx = GCM_CTX(aeadctx);
struct blkcipher_desc h_desc;
struct scatterlist src[1];
struct crypto_cipher *cipher;
unsigned int ck_size;
int ret = 0, key_ctx_size = 0;
@ -2223,27 +2222,26 @@ static int chcr_gcm_setkey(struct crypto_aead *aead, const u8 *key,
CHCR_KEYCTX_MAC_KEY_SIZE_128,
0, 0,
key_ctx_size >> 4);
/* Calculate the H = CIPH(K, 0 repeated 16 times) using sync aes
* blkcipher It will go on key context
/* Calculate the H = CIPH(K, 0 repeated 16 times).
* It will go in key context
*/
h_desc.tfm = crypto_alloc_blkcipher("cbc(aes-generic)", 0, 0);
if (IS_ERR(h_desc.tfm)) {
cipher = crypto_alloc_cipher("aes-generic", 0, 0);
if (IS_ERR(cipher)) {
aeadctx->enckey_len = 0;
ret = -ENOMEM;
goto out;
}
h_desc.flags = 0;
ret = crypto_blkcipher_setkey(h_desc.tfm, key, keylen);
ret = crypto_cipher_setkey(cipher, key, keylen);
if (ret) {
aeadctx->enckey_len = 0;
goto out1;
}
memset(gctx->ghash_h, 0, AEAD_H_SIZE);
sg_init_one(&src[0], gctx->ghash_h, AEAD_H_SIZE);
ret = crypto_blkcipher_encrypt(&h_desc, &src[0], &src[0], AEAD_H_SIZE);
crypto_cipher_encrypt_one(cipher, gctx->ghash_h, gctx->ghash_h);
out1:
crypto_free_blkcipher(h_desc.tfm);
crypto_free_cipher(cipher);
out:
return ret;
}