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| author | jmlatten@linux.vnet.ibm.com <jmlatten@linux.vnet.ibm.com> | 2013-08-14 22:17:57 (GMT) |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2013-08-21 11:08:38 (GMT) |
| commit | b4eba0ca341fb6ad0199ab3f2244aa7e0c4cb34d (patch) | |
| tree | d2b9cc14eb30f6bcdf1b139e4ae382984209e9e6 | |
| parent | d4d8edf88544e4df694d32594c3dde63f82be960 (diff) | |
| download | linux-b4eba0ca341fb6ad0199ab3f2244aa7e0c4cb34d.tar.xz | |
crypto: nx - fix nx-aes-gcm verification
This patch fixes a bug in the nx-aes-gcm implementation.
Corrected the code so that the authtag is always verified after
decrypting and not just when there is associated data included.
Also, corrected the code to retrieve the input authtag from src
instead of dst.
Reviewed-by: Fionnuala Gunter <fin@linux.vnet.ibm.com>
Reviewed-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
Signed-off-by: Joy Latten <jmlatten@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/nx/nx-aes-gcm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/crypto/nx/nx-aes-gcm.c b/drivers/crypto/nx/nx-aes-gcm.c index df90d03..74feee1 100644 --- a/drivers/crypto/nx/nx-aes-gcm.c +++ b/drivers/crypto/nx/nx-aes-gcm.c @@ -246,11 +246,11 @@ static int gcm_aes_nx_crypt(struct aead_request *req, int enc) req->dst, nbytes, crypto_aead_authsize(crypto_aead_reqtfm(req)), SCATTERWALK_TO_SG); - } else if (req->assoclen) { + } else { u8 *itag = nx_ctx->priv.gcm.iauth_tag; u8 *otag = csbcpb->cpb.aes_gcm.out_pat_or_mac; - scatterwalk_map_and_copy(itag, req->dst, nbytes, + scatterwalk_map_and_copy(itag, req->src, nbytes, crypto_aead_authsize(crypto_aead_reqtfm(req)), SCATTERWALK_FROM_SG); rc = memcmp(itag, otag, |