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crypto: ccree - use the full crypt length value

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commit 7a4be6c113c1f721818d1e3722a9015fe393295c upstream.

In case of AEAD decryption verifcation error we were using the
wrong value to zero out the plaintext buffer leaving the end of
the buffer with the false plaintext.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Fixes: ff27e85a85 ("crypto: ccree - add AEAD support")
CC: stable@vger.kernel.org # v4.17+
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gilad Ben-Yossef
2019-07-29 13:40:18 +03:00
committed by Greg Kroah-Hartman
parent f5c087a0d9
commit a0dc60ac6b
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/ccree/cc_aead.c
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@@ -227,7 +227,7 @@ static void cc_aead_complete(struct device *dev, void *cc_req, int err)
/* In case of payload authentication failure, MUST NOT
* revealed the decrypted message --> zero its memory.
*/
cc_zero_sgl(areq->dst, areq_ctx->cryptlen);
cc_zero_sgl(areq->dst, areq->cryptlen);
err = -EBADMSG;
}
} else { /*ENCRYPT*/