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authorMathias Krause <mathias.krause@secunet.com>2013-10-15 13:49:34 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2013-10-16 20:56:26 +0800
commitc306a98d637613818c87c19eabf7feba02b5b618 (patch)
treeefd44e2de0385f2f5b532526799f03a1e7bb188d /drivers/crypto
parentab827fb399b453bd7d4a49e8878bc5f7018507dd (diff)
downloadlinux-linaro-stable-c306a98d637613818c87c19eabf7feba02b5b618.tar.gz
crypto: talitos - Simplify key parsing
Use the common helper function crypto_authenc_extractkeys() for key parsing. Cc: Kim Phillips <kim.phillips@freescale.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Mathias Krause <mathias.krause@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/talitos.c35
1 files changed, 8 insertions, 27 deletions
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 661dc3eb1d66..f6f7c681073e 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -671,39 +671,20 @@ static int aead_setkey(struct crypto_aead *authenc,
const u8 *key, unsigned int keylen)
{
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
- struct rtattr *rta = (void *)key;
- struct crypto_authenc_key_param *param;
- unsigned int authkeylen;
- unsigned int enckeylen;
-
- if (!RTA_OK(rta, keylen))
- goto badkey;
+ struct crypto_authenc_keys keys;
- if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
+ if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
goto badkey;
- if (RTA_PAYLOAD(rta) < sizeof(*param))
+ if (keys.authkeylen + keys.enckeylen > TALITOS_MAX_KEY_SIZE)
goto badkey;
- param = RTA_DATA(rta);
- enckeylen = be32_to_cpu(param->enckeylen);
-
- key += RTA_ALIGN(rta->rta_len);
- keylen -= RTA_ALIGN(rta->rta_len);
-
- if (keylen < enckeylen)
- goto badkey;
+ memcpy(ctx->key, keys.authkey, keys.authkeylen);
+ memcpy(&ctx->key[keys.authkeylen], keys.enckey, keys.enckeylen);
- authkeylen = keylen - enckeylen;
-
- if (keylen > TALITOS_MAX_KEY_SIZE)
- goto badkey;
-
- memcpy(&ctx->key, key, keylen);
-
- ctx->keylen = keylen;
- ctx->enckeylen = enckeylen;
- ctx->authkeylen = authkeylen;
+ ctx->keylen = keys.authkeylen + keys.enckeylen;
+ ctx->enckeylen = keys.enckeylen;
+ ctx->authkeylen = keys.authkeylen;
return 0;