crypto: hisilicon - Forbid 2-key 3DES in FIPS mode

This patch forbids the use of 2-key 3DES (K1 == K3) in FIPS mode.

It also removes a couple of unnecessary key length checks that
are already performed by the crypto API.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/hisilicon/sec/sec_algs.c

@@ -365,20 +365,16 @@ static int sec_alg_skcipher_setkey_des_cbc(struct crypto_skcipher *tfm,
 static int sec_alg_skcipher_setkey_3des_ecb(struct crypto_skcipher *tfm,
 					    const u8 *key, unsigned int keylen)
 {
-	if (keylen != DES_KEY_SIZE * 3)
-		return -EINVAL;
-
-	return sec_alg_skcipher_setkey(tfm, key, keylen,
+	return unlikely(des3_verify_key(tfm, key)) ?:
+	       sec_alg_skcipher_setkey(tfm, key, keylen,
 				       SEC_C_3DES_ECB_192_3KEY);
 }
 
 static int sec_alg_skcipher_setkey_3des_cbc(struct crypto_skcipher *tfm,
 					    const u8 *key, unsigned int keylen)
 {
-	if (keylen != DES3_EDE_KEY_SIZE)
-		return -EINVAL;
-
-	return sec_alg_skcipher_setkey(tfm, key, keylen,
+	return unlikely(des3_verify_key(tfm, key)) ?:
+	       sec_alg_skcipher_setkey(tfm, key, keylen,
 				       SEC_C_3DES_CBC_192_3KEY);
 }