crypto: s390/des - switch to new verification routines

Switch to the refactored DES key verification routines. While at it,
rename the DES encrypt/decrypt routines so they will not conflict with
the DES library later on.

Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/s390/crypto/des_s390.c

@@ -16,7 +16,7 @@
 #include <linux/fips.h>
 #include <linux/mutex.h>
 #include <crypto/algapi.h>
-#include <crypto/des.h>
+#include <crypto/internal/des.h>
 #include <asm/cpacf.h>
 
 #define DES3_KEY_SIZE	(3 * DES_KEY_SIZE)
@@ -35,27 +35,24 @@ static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
 		      unsigned int key_len)
 {
 	struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
-	u32 tmp[DES_EXPKEY_WORDS];
+	int err;
 
-	/* check for weak keys */
-	if (!des_ekey(tmp, key) &&
-	    (tfm->crt_flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) {
-		tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
-		return -EINVAL;
-	}
+	err = crypto_des_verify_key(tfm, key);
+	if (err)
+		return err;
 
 	memcpy(ctx->key, key, key_len);
 	return 0;
 }
 
-static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
+static void s390_des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
 	struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
 
 	cpacf_km(CPACF_KM_DEA, ctx->key, out, in, DES_BLOCK_SIZE);
 }
 
-static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
+static void s390_des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
 	struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
 
@@ -76,8 +73,8 @@ static struct crypto_alg des_alg = {
 			.cia_min_keysize	=	DES_KEY_SIZE,
 			.cia_max_keysize	=	DES_KEY_SIZE,
 			.cia_setkey		=	des_setkey,
-			.cia_encrypt		=	des_encrypt,
-			.cia_decrypt		=	des_decrypt,
+			.cia_encrypt		=	s390_des_encrypt,
+			.cia_decrypt		=	s390_des_decrypt,
 		}
 	}
 };
@@ -227,8 +224,8 @@ static int des3_setkey(struct crypto_tfm *tfm, const u8 *key,
 	struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
 	int err;
 
-	err = __des3_verify_key(&tfm->crt_flags, key);
-	if (unlikely(err))
+	err = crypto_des3_ede_verify_key(tfm, key);
+	if (err)
 		return err;
 
 	memcpy(ctx->key, key, key_len);