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From:   Eric Biggers <ebiggers@kernel.org>
To:     linux-crypto@vger.kernel.org,
        Herbert Xu <herbert@gondor.apana.org.au>
Cc:     linux-s390@vger.kernel.org,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Harald Freudenberger <freude@linux.ibm.com>
Subject: [RFT PATCH 3/3] crypto: s390/des - convert to skcipher API
Date:   Sat, 12 Oct 2019 13:18:09 -0700
Message-Id: <20191012201809.160500-4-ebiggers@kernel.org>
In-Reply-To: <20191012201809.160500-1-ebiggers@kernel.org>
References: <20191012201809.160500-1-ebiggers@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-crypto-owner@vger.kernel.org
Precedence: bulk

From: Eric Biggers <ebiggers@google.com>

Convert the glue code for the S390 CPACF implementations of DES-ECB,
DES-CBC, DES-CTR, 3DES-ECB, 3DES-CBC, and 3DES-CTR from the deprecated
"blkcipher" API to the "skcipher" API.  This is needed in order for the
blkcipher API to be removed.

Note: I made CTR use the same function for encryption and decryption,
since CTR encryption and decryption are identical.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 arch/s390/crypto/des_s390.c | 419 +++++++++++++++---------------------
 1 file changed, 172 insertions(+), 247 deletions(-)

diff --git a/arch/s390/crypto/des_s390.c b/arch/s390/crypto/des_s390.c
index 439b100c6f2e..bfbafd35bcbd 100644
--- a/arch/s390/crypto/des_s390.c
+++ b/arch/s390/crypto/des_s390.c
@@ -17,6 +17,7 @@
 #include <linux/mutex.h>
 #include <crypto/algapi.h>
 #include <crypto/internal/des.h>
+#include <crypto/internal/skcipher.h>
 #include <asm/cpacf.h>
 
 #define DES3_KEY_SIZE	(3 * DES_KEY_SIZE)
@@ -45,6 +46,12 @@ static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
 	return 0;
 }
 
+static int des_setkey_skcipher(struct crypto_skcipher *tfm, const u8 *key,
+			       unsigned int key_len)
+{
+	return des_setkey(crypto_skcipher_tfm(tfm), key, key_len);
+}
+
 static void s390_des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
 	struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
@@ -79,28 +86,30 @@ static struct crypto_alg des_alg = {
 	}
 };
 
-static int ecb_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
-			    struct blkcipher_walk *walk)
+static int ecb_desall_crypt(struct skcipher_request *req, unsigned long fc)
 {
-	struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct s390_des_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct skcipher_walk walk;
 	unsigned int nbytes, n;
 	int ret;
 
-	ret = blkcipher_walk_virt(desc, walk);
-	while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
+	ret = skcipher_walk_virt(&walk, req, false);
+	while ((nbytes = walk.nbytes) != 0) {
 		/* only use complete blocks */
 		n = nbytes & ~(DES_BLOCK_SIZE - 1);
-		cpacf_km(fc, ctx->key, walk->dst.virt.addr,
-			 walk->src.virt.addr, n);
-		ret = blkcipher_walk_done(desc, walk, nbytes - n);
+		cpacf_km(fc, ctx->key, walk.dst.virt.addr,
+			 walk.src.virt.addr, n);
+		ret = skcipher_walk_done(&walk, nbytes - n);
 	}
 	return ret;
 }
 
-static int cbc_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
-			    struct blkcipher_walk *walk)
+static int cbc_desall_crypt(struct skcipher_request *req, unsigned long fc)
 {
-	struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct s390_des_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct skcipher_walk walk;
 	unsigned int nbytes, n;
 	int ret;
 	struct {
@@ -108,99 +117,69 @@ static int cbc_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
 		u8 key[DES3_KEY_SIZE];
 	} param;
 
-	ret = blkcipher_walk_virt(desc, walk);
-	memcpy(param.iv, walk->iv, DES_BLOCK_SIZE);
+	ret = skcipher_walk_virt(&walk, req, false);
+	if (ret)
+		return ret;
+	memcpy(param.iv, walk.iv, DES_BLOCK_SIZE);
 	memcpy(param.key, ctx->key, DES3_KEY_SIZE);
-	while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
+	while ((nbytes = walk.nbytes) != 0) {
 		/* only use complete blocks */
 		n = nbytes & ~(DES_BLOCK_SIZE - 1);
-		cpacf_kmc(fc, &param, walk->dst.virt.addr,
-			  walk->src.virt.addr, n);
-		ret = blkcipher_walk_done(desc, walk, nbytes - n);
+		cpacf_kmc(fc, &param, walk.dst.virt.addr,
+			  walk.src.virt.addr, n);
+		memcpy(walk.iv, param.iv, DES_BLOCK_SIZE);
+		ret = skcipher_walk_done(&walk, nbytes - n);
 	}
-	memcpy(walk->iv, param.iv, DES_BLOCK_SIZE);
 	return ret;
 }
 
-static int ecb_des_encrypt(struct blkcipher_desc *desc,
-			   struct scatterlist *dst, struct scatterlist *src,
-			   unsigned int nbytes)
+static int ecb_des_encrypt(struct skcipher_request *req)
 {
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ecb_desall_crypt(desc, CPACF_KM_DEA, &walk);
+	return ecb_desall_crypt(req, CPACF_KM_DEA);
 }
 
-static int ecb_des_decrypt(struct blkcipher_desc *desc,
-			   struct scatterlist *dst, struct scatterlist *src,
-			   unsigned int nbytes)
+static int ecb_des_decrypt(struct skcipher_request *req)
 {
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ecb_desall_crypt(desc, CPACF_KM_DEA | CPACF_DECRYPT, &walk);
+	return ecb_desall_crypt(req, CPACF_KM_DEA | CPACF_DECRYPT);
 }
 
-static struct crypto_alg ecb_des_alg = {
-	.cra_name		=	"ecb(des)",
-	.cra_driver_name	=	"ecb-des-s390",
-	.cra_priority		=	400,	/* combo: des + ecb */
-	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
-	.cra_blocksize		=	DES_BLOCK_SIZE,
-	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
-	.cra_type		=	&crypto_blkcipher_type,
-	.cra_module		=	THIS_MODULE,
-	.cra_u			=	{
-		.blkcipher = {
-			.min_keysize		=	DES_KEY_SIZE,
-			.max_keysize		=	DES_KEY_SIZE,
-			.setkey			=	des_setkey,
-			.encrypt		=	ecb_des_encrypt,
-			.decrypt		=	ecb_des_decrypt,
-		}
-	}
+static struct skcipher_alg ecb_des_alg = {
+	.base.cra_name		=	"ecb(des)",
+	.base.cra_driver_name	=	"ecb-des-s390",
+	.base.cra_priority	=	400,	/* combo: des + ecb */
+	.base.cra_blocksize	=	DES_BLOCK_SIZE,
+	.base.cra_ctxsize	=	sizeof(struct s390_des_ctx),
+	.base.cra_module	=	THIS_MODULE,
+	.min_keysize		=	DES_KEY_SIZE,
+	.max_keysize		=	DES_KEY_SIZE,
+	.setkey			=	des_setkey_skcipher,
+	.encrypt		=	ecb_des_encrypt,
+	.decrypt		=	ecb_des_decrypt,
 };
 
-static int cbc_des_encrypt(struct blkcipher_desc *desc,
-			   struct scatterlist *dst, struct scatterlist *src,
-			   unsigned int nbytes)
+static int cbc_des_encrypt(struct skcipher_request *req)
 {
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return cbc_desall_crypt(desc, CPACF_KMC_DEA, &walk);
+	return cbc_desall_crypt(req, CPACF_KMC_DEA);
 }
 
-static int cbc_des_decrypt(struct blkcipher_desc *desc,
-			   struct scatterlist *dst, struct scatterlist *src,
-			   unsigned int nbytes)
+static int cbc_des_decrypt(struct skcipher_request *req)
 {
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return cbc_desall_crypt(desc, CPACF_KMC_DEA | CPACF_DECRYPT, &walk);
+	return cbc_desall_crypt(req, CPACF_KMC_DEA | CPACF_DECRYPT);
 }
 
-static struct crypto_alg cbc_des_alg = {
-	.cra_name		=	"cbc(des)",
-	.cra_driver_name	=	"cbc-des-s390",
-	.cra_priority		=	400,	/* combo: des + cbc */
-	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
-	.cra_blocksize		=	DES_BLOCK_SIZE,
-	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
-	.cra_type		=	&crypto_blkcipher_type,
-	.cra_module		=	THIS_MODULE,
-	.cra_u			=	{
-		.blkcipher = {
-			.min_keysize		=	DES_KEY_SIZE,
-			.max_keysize		=	DES_KEY_SIZE,
-			.ivsize			=	DES_BLOCK_SIZE,
-			.setkey			=	des_setkey,
-			.encrypt		=	cbc_des_encrypt,
-			.decrypt		=	cbc_des_decrypt,
-		}
-	}
+static struct skcipher_alg cbc_des_alg = {
+	.base.cra_name		=	"cbc(des)",
+	.base.cra_driver_name	=	"cbc-des-s390",
+	.base.cra_priority	=	400,	/* combo: des + cbc */
+	.base.cra_blocksize	=	DES_BLOCK_SIZE,
+	.base.cra_ctxsize	=	sizeof(struct s390_des_ctx),
+	.base.cra_module	=	THIS_MODULE,
+	.min_keysize		=	DES_KEY_SIZE,
+	.max_keysize		=	DES_KEY_SIZE,
+	.ivsize			=	DES_BLOCK_SIZE,
+	.setkey			=	des_setkey_skcipher,
+	.encrypt		=	cbc_des_encrypt,
+	.decrypt		=	cbc_des_decrypt,
 };
 
 /*
@@ -232,6 +211,12 @@ static int des3_setkey(struct crypto_tfm *tfm, const u8 *key,
 	return 0;
 }
 
+static int des3_setkey_skcipher(struct crypto_skcipher *tfm, const u8 *key,
+				unsigned int key_len)
+{
+	return des3_setkey(crypto_skcipher_tfm(tfm), key, key_len);
+}
+
 static void des3_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
@@ -266,87 +251,53 @@ static struct crypto_alg des3_alg = {
 	}
 };
 
-static int ecb_des3_encrypt(struct blkcipher_desc *desc,
-			    struct scatterlist *dst, struct scatterlist *src,
-			    unsigned int nbytes)
+static int ecb_des3_encrypt(struct skcipher_request *req)
 {
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ecb_desall_crypt(desc, CPACF_KM_TDEA_192, &walk);
+	return ecb_desall_crypt(req, CPACF_KM_TDEA_192);
 }
 
-static int ecb_des3_decrypt(struct blkcipher_desc *desc,
-			    struct scatterlist *dst, struct scatterlist *src,
-			    unsigned int nbytes)
+static int ecb_des3_decrypt(struct skcipher_request *req)
 {
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ecb_desall_crypt(desc, CPACF_KM_TDEA_192 | CPACF_DECRYPT,
-				&walk);
+	return ecb_desall_crypt(req, CPACF_KM_TDEA_192 | CPACF_DECRYPT);
 }
 
-static struct crypto_alg ecb_des3_alg = {
-	.cra_name		=	"ecb(des3_ede)",
-	.cra_driver_name	=	"ecb-des3_ede-s390",
-	.cra_priority		=	400,	/* combo: des3 + ecb */
-	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
-	.cra_blocksize		=	DES_BLOCK_SIZE,
-	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
-	.cra_type		=	&crypto_blkcipher_type,
-	.cra_module		=	THIS_MODULE,
-	.cra_u			=	{
-		.blkcipher = {
-			.min_keysize		=	DES3_KEY_SIZE,
-			.max_keysize		=	DES3_KEY_SIZE,
-			.setkey			=	des3_setkey,
-			.encrypt		=	ecb_des3_encrypt,
-			.decrypt		=	ecb_des3_decrypt,
-		}
-	}
+static struct skcipher_alg ecb_des3_alg = {
+	.base.cra_name		=	"ecb(des3_ede)",
+	.base.cra_driver_name	=	"ecb-des3_ede-s390",
+	.base.cra_priority	=	400,	/* combo: des3 + ecb */
+	.base.cra_blocksize	=	DES_BLOCK_SIZE,
+	.base.cra_ctxsize	=	sizeof(struct s390_des_ctx),
+	.base.cra_module	=	THIS_MODULE,
+	.min_keysize		=	DES3_KEY_SIZE,
+	.max_keysize		=	DES3_KEY_SIZE,
+	.setkey			=	des3_setkey_skcipher,
+	.encrypt		=	ecb_des3_encrypt,
+	.decrypt		=	ecb_des3_decrypt,
 };
 
-static int cbc_des3_encrypt(struct blkcipher_desc *desc,
-			    struct scatterlist *dst, struct scatterlist *src,
-			    unsigned int nbytes)
+static int cbc_des3_encrypt(struct skcipher_request *req)
 {
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return cbc_desall_crypt(desc, CPACF_KMC_TDEA_192, &walk);
+	return cbc_desall_crypt(req, CPACF_KMC_TDEA_192);
 }
 
-static int cbc_des3_decrypt(struct blkcipher_desc *desc,
-			    struct scatterlist *dst, struct scatterlist *src,
-			    unsigned int nbytes)
+static int cbc_des3_decrypt(struct skcipher_request *req)
 {
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return cbc_desall_crypt(desc, CPACF_KMC_TDEA_192 | CPACF_DECRYPT,
-				&walk);
+	return cbc_desall_crypt(req, CPACF_KMC_TDEA_192 | CPACF_DECRYPT);
 }
 
-static struct crypto_alg cbc_des3_alg = {
-	.cra_name		=	"cbc(des3_ede)",
-	.cra_driver_name	=	"cbc-des3_ede-s390",
-	.cra_priority		=	400,	/* combo: des3 + cbc */
-	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
-	.cra_blocksize		=	DES_BLOCK_SIZE,
-	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
-	.cra_type		=	&crypto_blkcipher_type,
-	.cra_module		=	THIS_MODULE,
-	.cra_u			=	{
-		.blkcipher = {
-			.min_keysize		=	DES3_KEY_SIZE,
-			.max_keysize		=	DES3_KEY_SIZE,
-			.ivsize			=	DES_BLOCK_SIZE,
-			.setkey			=	des3_setkey,
-			.encrypt		=	cbc_des3_encrypt,
-			.decrypt		=	cbc_des3_decrypt,
-		}
-	}
+static struct skcipher_alg cbc_des3_alg = {
+	.base.cra_name		=	"cbc(des3_ede)",
+	.base.cra_driver_name	=	"cbc-des3_ede-s390",
+	.base.cra_priority	=	400,	/* combo: des3 + cbc */
+	.base.cra_blocksize	=	DES_BLOCK_SIZE,
+	.base.cra_ctxsize	=	sizeof(struct s390_des_ctx),
+	.base.cra_module	=	THIS_MODULE,
+	.min_keysize		=	DES3_KEY_SIZE,
+	.max_keysize		=	DES3_KEY_SIZE,
+	.ivsize			=	DES_BLOCK_SIZE,
+	.setkey			=	des3_setkey_skcipher,
+	.encrypt		=	cbc_des3_encrypt,
+	.decrypt		=	cbc_des3_decrypt,
 };
 
 static unsigned int __ctrblk_init(u8 *ctrptr, u8 *iv, unsigned int nbytes)
@@ -364,128 +315,90 @@ static unsigned int __ctrblk_init(u8 *ctrptr, u8 *iv, unsigned int nbytes)
 	return n;
 }
 
-static int ctr_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
-			    struct blkcipher_walk *walk)
+static int ctr_desall_crypt(struct skcipher_request *req, unsigned long fc)
 {
-	struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct s390_des_ctx *ctx = crypto_skcipher_ctx(tfm);
 	u8 buf[DES_BLOCK_SIZE], *ctrptr;
+	struct skcipher_walk walk;
 	unsigned int n, nbytes;
 	int ret, locked;
 
 	locked = mutex_trylock(&ctrblk_lock);
 
-	ret = blkcipher_walk_virt_block(desc, walk, DES_BLOCK_SIZE);
-	while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
+	ret = skcipher_walk_virt(&walk, req, false);
+	while ((nbytes = walk.nbytes) >= DES_BLOCK_SIZE) {
 		n = DES_BLOCK_SIZE;
 		if (nbytes >= 2*DES_BLOCK_SIZE && locked)
-			n = __ctrblk_init(ctrblk, walk->iv, nbytes);
-		ctrptr = (n > DES_BLOCK_SIZE) ? ctrblk : walk->iv;
-		cpacf_kmctr(fc, ctx->key, walk->dst.virt.addr,
-			    walk->src.virt.addr, n, ctrptr);
+			n = __ctrblk_init(ctrblk, walk.iv, nbytes);
+		ctrptr = (n > DES_BLOCK_SIZE) ? ctrblk : walk.iv;
+		cpacf_kmctr(fc, ctx->key, walk.dst.virt.addr,
+			    walk.src.virt.addr, n, ctrptr);
 		if (ctrptr == ctrblk)
-			memcpy(walk->iv, ctrptr + n - DES_BLOCK_SIZE,
+			memcpy(walk.iv, ctrptr + n - DES_BLOCK_SIZE,
 				DES_BLOCK_SIZE);
-		crypto_inc(walk->iv, DES_BLOCK_SIZE);
-		ret = blkcipher_walk_done(desc, walk, nbytes - n);
+		crypto_inc(walk.iv, DES_BLOCK_SIZE);
+		ret = skcipher_walk_done(&walk, nbytes - n);
 	}
 	if (locked)
 		mutex_unlock(&ctrblk_lock);
 	/* final block may be < DES_BLOCK_SIZE, copy only nbytes */
 	if (nbytes) {
-		cpacf_kmctr(fc, ctx->key, buf, walk->src.virt.addr,
-			    DES_BLOCK_SIZE, walk->iv);
-		memcpy(walk->dst.virt.addr, buf, nbytes);
-		crypto_inc(walk->iv, DES_BLOCK_SIZE);
-		ret = blkcipher_walk_done(desc, walk, 0);
+		cpacf_kmctr(fc, ctx->key, buf, walk.src.virt.addr,
+			    DES_BLOCK_SIZE, walk.iv);
+		memcpy(walk.dst.virt.addr, buf, nbytes);
+		crypto_inc(walk.iv, DES_BLOCK_SIZE);
+		ret = skcipher_walk_done(&walk, 0);
 	}
 	return ret;
 }
 
-static int ctr_des_encrypt(struct blkcipher_desc *desc,
-			   struct scatterlist *dst, struct scatterlist *src,
-			   unsigned int nbytes)
-{
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ctr_desall_crypt(desc, CPACF_KMCTR_DEA, &walk);
-}
-
-static int ctr_des_decrypt(struct blkcipher_desc *desc,
-			   struct scatterlist *dst, struct scatterlist *src,
-			   unsigned int nbytes)
+static int ctr_des_crypt(struct skcipher_request *req)
 {
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ctr_desall_crypt(desc, CPACF_KMCTR_DEA | CPACF_DECRYPT, &walk);
+	return ctr_desall_crypt(req, CPACF_KMCTR_DEA);
 }
 
-static struct crypto_alg ctr_des_alg = {
-	.cra_name		=	"ctr(des)",
-	.cra_driver_name	=	"ctr-des-s390",
-	.cra_priority		=	400,	/* combo: des + ctr */
-	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
-	.cra_blocksize		=	1,
-	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
-	.cra_type		=	&crypto_blkcipher_type,
-	.cra_module		=	THIS_MODULE,
-	.cra_u			=	{
-		.blkcipher = {
-			.min_keysize		=	DES_KEY_SIZE,
-			.max_keysize		=	DES_KEY_SIZE,
-			.ivsize			=	DES_BLOCK_SIZE,
-			.setkey			=	des_setkey,
-			.encrypt		=	ctr_des_encrypt,
-			.decrypt		=	ctr_des_decrypt,
-		}
-	}
+static struct skcipher_alg ctr_des_alg = {
+	.base.cra_name		=	"ctr(des)",
+	.base.cra_driver_name	=	"ctr-des-s390",
+	.base.cra_priority	=	400,	/* combo: des + ctr */
+	.base.cra_blocksize	=	1,
+	.base.cra_ctxsize	=	sizeof(struct s390_des_ctx),
+	.base.cra_module	=	THIS_MODULE,
+	.min_keysize		=	DES_KEY_SIZE,
+	.max_keysize		=	DES_KEY_SIZE,
+	.ivsize			=	DES_BLOCK_SIZE,
+	.setkey			=	des_setkey_skcipher,
+	.encrypt		=	ctr_des_crypt,
+	.decrypt		=	ctr_des_crypt,
+	.chunksize		=	DES_BLOCK_SIZE,
 };
 
-static int ctr_des3_encrypt(struct blkcipher_desc *desc,
-			    struct scatterlist *dst, struct scatterlist *src,
-			    unsigned int nbytes)
-{
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ctr_desall_crypt(desc, CPACF_KMCTR_TDEA_192, &walk);
-}
-
-static int ctr_des3_decrypt(struct blkcipher_desc *desc,
-			    struct scatterlist *dst, struct scatterlist *src,
-			    unsigned int nbytes)
+static int ctr_des3_crypt(struct skcipher_request *req)
 {
-	struct blkcipher_walk walk;
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ctr_desall_crypt(desc, CPACF_KMCTR_TDEA_192 | CPACF_DECRYPT,
-				&walk);
+	return ctr_desall_crypt(req, CPACF_KMCTR_TDEA_192);
 }
 
-static struct crypto_alg ctr_des3_alg = {
-	.cra_name		=	"ctr(des3_ede)",
-	.cra_driver_name	=	"ctr-des3_ede-s390",
-	.cra_priority		=	400,	/* combo: des3 + ede */
-	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
-	.cra_blocksize		=	1,
-	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
-	.cra_type		=	&crypto_blkcipher_type,
-	.cra_module		=	THIS_MODULE,
-	.cra_u			=	{
-		.blkcipher = {
-			.min_keysize		=	DES3_KEY_SIZE,
-			.max_keysize		=	DES3_KEY_SIZE,
-			.ivsize			=	DES_BLOCK_SIZE,
-			.setkey			=	des3_setkey,
-			.encrypt		=	ctr_des3_encrypt,
-			.decrypt		=	ctr_des3_decrypt,
-		}
-	}
+static struct skcipher_alg ctr_des3_alg = {
+	.base.cra_name		=	"ctr(des3_ede)",
+	.base.cra_driver_name	=	"ctr-des3_ede-s390",
+	.base.cra_priority	=	400,	/* combo: des3 + ede */
+	.base.cra_blocksize	=	1,
+	.base.cra_ctxsize	=	sizeof(struct s390_des_ctx),
+	.base.cra_module	=	THIS_MODULE,
+	.min_keysize		=	DES3_KEY_SIZE,
+	.max_keysize		=	DES3_KEY_SIZE,
+	.ivsize			=	DES_BLOCK_SIZE,
+	.setkey			=	des3_setkey_skcipher,
+	.encrypt		=	ctr_des3_crypt,
+	.decrypt		=	ctr_des3_crypt,
+	.chunksize		=	DES_BLOCK_SIZE,
 };
 
-static struct crypto_alg *des_s390_algs_ptr[8];
+static struct crypto_alg *des_s390_algs_ptr[2];
 static int des_s390_algs_num;
+static struct skcipher_alg *des_s390_skciphers_ptr[6];
+static int des_s390_skciphers_num;
 
 static int des_s390_register_alg(struct crypto_alg *alg)
 {
@@ -497,10 +410,22 @@ static int des_s390_register_alg(struct crypto_alg *alg)
 	return ret;
 }
 
+static int des_s390_register_skcipher(struct skcipher_alg *alg)
+{
+	int ret;
+
+	ret = crypto_register_skcipher(alg);
+	if (!ret)
+		des_s390_skciphers_ptr[des_s390_skciphers_num++] = alg;
+	return ret;
+}
+
 static void des_s390_exit(void)
 {
 	while (des_s390_algs_num--)
 		crypto_unregister_alg(des_s390_algs_ptr[des_s390_algs_num]);
+	while (des_s390_skciphers_num--)
+		crypto_unregister_skcipher(des_s390_skciphers_ptr[des_s390_skciphers_num]);
 	if (ctrblk)
 		free_page((unsigned long) ctrblk);
 }
@@ -518,12 +443,12 @@ static int __init des_s390_init(void)
 		ret = des_s390_register_alg(&des_alg);
 		if (ret)
 			goto out_err;
-		ret = des_s390_register_alg(&ecb_des_alg);
+		ret = des_s390_register_skcipher(&ecb_des_alg);
 		if (ret)
 			goto out_err;
 	}
 	if (cpacf_test_func(&kmc_functions, CPACF_KMC_DEA)) {
-		ret = des_s390_register_alg(&cbc_des_alg);
+		ret = des_s390_register_skcipher(&cbc_des_alg);
 		if (ret)
 			goto out_err;
 	}
@@ -531,12 +456,12 @@ static int __init des_s390_init(void)
 		ret = des_s390_register_alg(&des3_alg);
 		if (ret)
 			goto out_err;
-		ret = des_s390_register_alg(&ecb_des3_alg);
+		ret = des_s390_register_skcipher(&ecb_des3_alg);
 		if (ret)
 			goto out_err;
 	}
 	if (cpacf_test_func(&kmc_functions, CPACF_KMC_TDEA_192)) {
-		ret = des_s390_register_alg(&cbc_des3_alg);
+		ret = des_s390_register_skcipher(&cbc_des3_alg);
 		if (ret)
 			goto out_err;
 	}
@@ -551,12 +476,12 @@ static int __init des_s390_init(void)
 	}
 
 	if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_DEA)) {
-		ret = des_s390_register_alg(&ctr_des_alg);
+		ret = des_s390_register_skcipher(&ctr_des_alg);
 		if (ret)
 			goto out_err;
 	}
 	if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_TDEA_192)) {
-		ret = des_s390_register_alg(&ctr_des3_alg);
+		ret = des_s390_register_skcipher(&ctr_des3_alg);
 		if (ret)
 			goto out_err;
 	}
-- 
2.23.0