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crypto: ccp - Fill the result buffer only on digest, finup, and final ops

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Any change to the result buffer should only happen on final, finup
and digest operations. Changes to the buffer for update, import, export,
etc, are not allowed.

Fixes: 66d7b9f6175e ("crypto: testmgr - test misuse of result in ahash")
Signed-off-by: Gary R Hook <gary.hook@amd.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gary R Hook
2018-03-07 11:37:42 -06:00
committed by Herbert Xu
parent 9cc16b4d32
commit 0ee991be4c
2 changed files with 2 additions and 2 deletions
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2
drivers/crypto/ccp/ccp-crypto-aes-cmac.c
View File

@@ -46,7 +46,7 @@ static int ccp_aes_cmac_complete(struct crypto_async_request *async_req,
}
/* Update result area if supplied */
if (req->result)
if (req->result && rctx->final)
memcpy(req->result, rctx->iv, digest_size);
e_free:

2
drivers/crypto/ccp/ccp-crypto-sha.c
View File

@@ -47,7 +47,7 @@ static int ccp_sha_complete(struct crypto_async_request *async_req, int ret)
}
/* Update result area if supplied */
if (req->result)
if (req->result && rctx->final)
memcpy(req->result, rctx->ctx, digest_size);
e_free: