diff options
| author | Harsh Jain <harsh@chelsio.com> | 2018-03-06 06:07:50 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-03-16 16:35:46 +0100 |
| commit | 5fb78dba1667d63ab5ebed19724477a2f1e08717 (patch) | |
| tree | 1408168ec227f1874a015072bcfc3588eb04eaa9 /drivers/crypto | |
| parent | crypto: chelsio - Fix src buffer dma length (diff) | |
| download | linux-5fb78dba1667d63ab5ebed19724477a2f1e08717.tar.xz linux-5fb78dba1667d63ab5ebed19724477a2f1e08717.zip | |
crypto: chelsio - Update IV before sending request to HW
CBC Decryption requires Last Block as IV. In case src/dst buffer
are same last block will be replaced by plain text. This patch copies
the Last Block before sending request to HW.
Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/chelsio/chcr_algo.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c index bc70f4f4e601..002e0c298fb5 100644 --- a/drivers/crypto/chelsio/chcr_algo.c +++ b/drivers/crypto/chelsio/chcr_algo.c @@ -854,6 +854,13 @@ static struct sk_buff *create_cipher_wr(struct cipher_wr_param *wrparam) transhdr_len, temp, ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CBC); reqctx->skb = skb; + + if (reqctx->op && (ablkctx->ciph_mode == + CHCR_SCMD_CIPHER_MODE_AES_CBC)) + sg_pcopy_to_buffer(wrparam->req->src, + sg_nents(wrparam->req->src), wrparam->req->info, 16, + reqctx->processed + wrparam->bytes - AES_BLOCK_SIZE); + return skb; err: return ERR_PTR(error); @@ -1077,9 +1084,8 @@ static int chcr_update_cipher_iv(struct ablkcipher_request *req, 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, - 16, - reqctx->processed - AES_BLOCK_SIZE); + /*Updated before sending last WR*/ + memcpy(iv, req->info, AES_BLOCK_SIZE); else memcpy(iv, &fw6_pld->data[2], AES_BLOCK_SIZE); } @@ -1107,11 +1113,8 @@ static int chcr_final_cipher_iv(struct ablkcipher_request *req, else if (subtype == CRYPTO_ALG_SUB_TYPE_XTS) 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, - 16, - reqctx->processed - AES_BLOCK_SIZE); - else + /*Already updated for Decrypt*/ + if (!reqctx->op) memcpy(iv, &fw6_pld->data[2], AES_BLOCK_SIZE); } |