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crypto: caam - update IV only when crypto operation succeeds

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skcipher encryption might fail and in some cases, like (invalid) input
length smaller then block size, updating the IV would lead to a useless
IV copy in case hardware issued an error.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geantă
2019-07-31 16:08:04 +03:00
committed by Herbert Xu
parent 1984aaeec3
commit 1ccb39eb5a
3 changed files with 11 additions and 6 deletions
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8
drivers/crypto/caam/caamalg_qi2.c
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@@ -1359,7 +1359,9 @@ static void skcipher_encrypt_done(void *cbk_ctx, u32 status)
* ciphertext block (CBC mode) or last counter (CTR mode).
* This is used e.g. by the CTS mode.
*/
memcpy(req->iv, (u8 *)&edesc->sgt[0] + edesc->qm_sg_bytes, ivsize);
if (!ecode)
memcpy(req->iv, (u8 *)&edesc->sgt[0] + edesc->qm_sg_bytes,
ivsize);
qi_cache_free(edesc);
skcipher_request_complete(req, ecode);
@@ -1395,7 +1397,9 @@ static void skcipher_decrypt_done(void *cbk_ctx, u32 status)
* ciphertext block (CBC mode) or last counter (CTR mode).
* This is used e.g. by the CTS mode.
*/
memcpy(req->iv, (u8 *)&edesc->sgt[0] + edesc->qm_sg_bytes, ivsize);
if (!ecode)
memcpy(req->iv, (u8 *)&edesc->sgt[0] + edesc->qm_sg_bytes,
ivsize);
qi_cache_free(edesc);
skcipher_request_complete(req, ecode);