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>

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;