arch/s390/crypto/des_s390.c - kernel/msm-4.9 - Gitiles

 /*
  * Cryptographic API.
  *
  * s390 implementation of the DES Cipher Algorithm.
  *
  * Copyright IBM Corp. 2003,2007
  * Author(s): Thomas Spatzier
  *	      Jan Glauber (jan.glauber@de.ibm.com)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  */

 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/crypto.h>
 #include <crypto/algapi.h>
 #include <crypto/des.h>

 #include "crypt_s390.h"

 #define DES3_192_KEY_SIZE	(3 * DES_KEY_SIZE)

 struct crypt_s390_des_ctx {
 	u8 iv[DES_BLOCK_SIZE];
 	u8 key[DES_KEY_SIZE];
 };

 struct crypt_s390_des3_192_ctx {
 	u8 iv[DES_BLOCK_SIZE];
 	u8 key[DES3_192_KEY_SIZE];
 };

 static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
 		      unsigned int keylen)
 {
 	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
 	u32 *flags = &tfm->crt_flags;
 	u32 tmp[DES_EXPKEY_WORDS];

 	/* check for weak keys */
 	if (!des_ekey(tmp, key) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
 		*flags |= CRYPTO_TFM_RES_WEAK_KEY;
 		return -EINVAL;
 	}

 	memcpy(dctx->key, key, keylen);
 	return 0;
 }

 static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
 	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);

 	crypt_s390_km(KM_DEA_ENCRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
 }

 static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
 	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);

 	crypt_s390_km(KM_DEA_DECRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
 }

 static struct crypto_alg des_alg = {
 	.cra_name		=	"des",
 	.cra_driver_name	=	"des-s390",
 	.cra_priority		=	CRYPT_S390_PRIORITY,
 	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct crypt_s390_des_ctx),
 	.cra_module		=	THIS_MODULE,
 	.cra_list		=	LIST_HEAD_INIT(des_alg.cra_list),
 	.cra_u			=	{
 		.cipher = {
 			.cia_min_keysize	=	DES_KEY_SIZE,
 			.cia_max_keysize	=	DES_KEY_SIZE,
 			.cia_setkey		=	des_setkey,
 			.cia_encrypt		=	des_encrypt,
 			.cia_decrypt		=	des_decrypt,
 		}
 	}
 };

 static int ecb_desall_crypt(struct blkcipher_desc *desc, long func,
 			    void *param, struct blkcipher_walk *walk)
 {
 	int ret = blkcipher_walk_virt(desc, walk);
 	unsigned int nbytes;

 	while ((nbytes = walk->nbytes)) {
 		/* only use complete blocks */
 		unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
 		u8 *out = walk->dst.virt.addr;
 		u8 *in = walk->src.virt.addr;

 		ret = crypt_s390_km(func, param, out, in, n);
 		BUG_ON((ret < 0) || (ret != n));

 		nbytes &= DES_BLOCK_SIZE - 1;
 		ret = blkcipher_walk_done(desc, walk, nbytes);
 	}

 	return ret;
 }

 static int cbc_desall_crypt(struct blkcipher_desc *desc, long func,
 			    void *param, struct blkcipher_walk *walk)
 {
 	int ret = blkcipher_walk_virt(desc, walk);
 	unsigned int nbytes = walk->nbytes;

 	if (!nbytes)
 		goto out;

 	memcpy(param, walk->iv, DES_BLOCK_SIZE);
 	do {
 		/* only use complete blocks */
 		unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
 		u8 *out = walk->dst.virt.addr;
 		u8 *in = walk->src.virt.addr;

 		ret = crypt_s390_kmc(func, param, out, in, n);
 		BUG_ON((ret < 0) || (ret != n));

 		nbytes &= DES_BLOCK_SIZE - 1;
 		ret = blkcipher_walk_done(desc, walk, nbytes);
 	} while ((nbytes = walk->nbytes));
 	memcpy(walk->iv, param, DES_BLOCK_SIZE);

 out:
 	return ret;
 }

 static int ecb_des_encrypt(struct blkcipher_desc *desc,
 			   struct scatterlist *dst, struct scatterlist *src,
 			   unsigned int nbytes)
 {
 	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
 	struct blkcipher_walk walk;

 	blkcipher_walk_init(&walk, dst, src, nbytes);
 	return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, sctx->key, &walk);
 }

 static int ecb_des_decrypt(struct blkcipher_desc *desc,
 			   struct scatterlist *dst, struct scatterlist *src,
 			   unsigned int nbytes)
 {
 	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
 	struct blkcipher_walk walk;

 	blkcipher_walk_init(&walk, dst, src, nbytes);
 	return ecb_desall_crypt(desc, KM_DEA_DECRYPT, sctx->key, &walk);
 }

 static struct crypto_alg ecb_des_alg = {
 	.cra_name		=	"ecb(des)",
 	.cra_driver_name	=	"ecb-des-s390",
 	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
 	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct crypt_s390_des_ctx),
 	.cra_type		=	&crypto_blkcipher_type,
 	.cra_module		=	THIS_MODULE,
 	.cra_list		=	LIST_HEAD_INIT(ecb_des_alg.cra_list),
 	.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 int cbc_des_encrypt(struct blkcipher_desc *desc,
 			   struct scatterlist *dst, struct scatterlist *src,
 			   unsigned int nbytes)
 {
 	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
 	struct blkcipher_walk walk;

 	blkcipher_walk_init(&walk, dst, src, nbytes);
 	return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, sctx->iv, &walk);
 }

 static int cbc_des_decrypt(struct blkcipher_desc *desc,
 			   struct scatterlist *dst, struct scatterlist *src,
 			   unsigned int nbytes)
 {
 	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
 	struct blkcipher_walk walk;

 	blkcipher_walk_init(&walk, dst, src, nbytes);
 	return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, sctx->iv, &walk);
 }

 static struct crypto_alg cbc_des_alg = {
 	.cra_name		=	"cbc(des)",
 	.cra_driver_name	=	"cbc-des-s390",
 	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
 	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct crypt_s390_des_ctx),
 	.cra_type		=	&crypto_blkcipher_type,
 	.cra_module		=	THIS_MODULE,
 	.cra_list		=	LIST_HEAD_INIT(cbc_des_alg.cra_list),
 	.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,
 		}
 	}
 };

 /*
  * RFC2451:
  *
  *   For DES-EDE3, there is no known need to reject weak or
  *   complementation keys.  Any weakness is obviated by the use of
  *   multiple keys.
  *
  *   However, if the first two or last two independent 64-bit keys are
  *   equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
  *   same as DES.  Implementers MUST reject keys that exhibit this
  *   property.
  *
  */
 static int des3_192_setkey(struct crypto_tfm *tfm, const u8 *key,
 			   unsigned int keylen)
 {
 	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
 	u32 *flags = &tfm->crt_flags;

 	if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
 	    memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
 		   DES_KEY_SIZE)) &&
 	    (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
 		*flags |= CRYPTO_TFM_RES_WEAK_KEY;
 		return -EINVAL;
 	}
 	memcpy(dctx->key, key, keylen);
 	return 0;
 }

 static void des3_192_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);

 	crypt_s390_km(KM_TDEA_192_ENCRYPT, dctx->key, dst, (void*)src,
 		      DES_BLOCK_SIZE);
 }

 static void des3_192_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);

 	crypt_s390_km(KM_TDEA_192_DECRYPT, dctx->key, dst, (void*)src,
 		      DES_BLOCK_SIZE);
 }

 static struct crypto_alg des3_192_alg = {
 	.cra_name		=	"des3_ede",
 	.cra_driver_name	=	"des3_ede-s390",
 	.cra_priority		=	CRYPT_S390_PRIORITY,
 	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct crypt_s390_des3_192_ctx),
 	.cra_module		=	THIS_MODULE,
 	.cra_list		=	LIST_HEAD_INIT(des3_192_alg.cra_list),
 	.cra_u			=	{
 		.cipher = {
 			.cia_min_keysize	=	DES3_192_KEY_SIZE,
 			.cia_max_keysize	=	DES3_192_KEY_SIZE,
 			.cia_setkey		=	des3_192_setkey,
 			.cia_encrypt		=	des3_192_encrypt,
 			.cia_decrypt		=	des3_192_decrypt,
 		}
 	}
 };

 static int ecb_des3_192_encrypt(struct blkcipher_desc *desc,
 				struct scatterlist *dst,
 				struct scatterlist *src, unsigned int nbytes)
 {
 	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
 	struct blkcipher_walk walk;

 	blkcipher_walk_init(&walk, dst, src, nbytes);
 	return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, sctx->key, &walk);
 }

 static int ecb_des3_192_decrypt(struct blkcipher_desc *desc,
 				struct scatterlist *dst,
 				struct scatterlist *src, unsigned int nbytes)
 {
 	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
 	struct blkcipher_walk walk;

 	blkcipher_walk_init(&walk, dst, src, nbytes);
 	return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, sctx->key, &walk);
 }

 static struct crypto_alg ecb_des3_192_alg = {
 	.cra_name		=	"ecb(des3_ede)",
 	.cra_driver_name	=	"ecb-des3_ede-s390",
 	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
 	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct crypt_s390_des3_192_ctx),
 	.cra_type		=	&crypto_blkcipher_type,
 	.cra_module		=	THIS_MODULE,
 	.cra_list		=	LIST_HEAD_INIT(
 						ecb_des3_192_alg.cra_list),
 	.cra_u			=	{
 		.blkcipher = {
 			.min_keysize		=	DES3_192_KEY_SIZE,
 			.max_keysize		=	DES3_192_KEY_SIZE,
 			.setkey			=	des3_192_setkey,
 			.encrypt		=	ecb_des3_192_encrypt,
 			.decrypt		=	ecb_des3_192_decrypt,
 		}
 	}
 };

 static int cbc_des3_192_encrypt(struct blkcipher_desc *desc,
 				struct scatterlist *dst,
 				struct scatterlist *src, unsigned int nbytes)
 {
 	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
 	struct blkcipher_walk walk;

 	blkcipher_walk_init(&walk, dst, src, nbytes);
 	return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, sctx->iv, &walk);
 }

 static int cbc_des3_192_decrypt(struct blkcipher_desc *desc,
 				struct scatterlist *dst,
 				struct scatterlist *src, unsigned int nbytes)
 {
 	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
 	struct blkcipher_walk walk;

 	blkcipher_walk_init(&walk, dst, src, nbytes);
 	return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, sctx->iv, &walk);
 }

 static struct crypto_alg cbc_des3_192_alg = {
 	.cra_name		=	"cbc(des3_ede)",
 	.cra_driver_name	=	"cbc-des3_ede-s390",
 	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
 	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct crypt_s390_des3_192_ctx),
 	.cra_type		=	&crypto_blkcipher_type,
 	.cra_module		=	THIS_MODULE,
 	.cra_list		=	LIST_HEAD_INIT(
 						cbc_des3_192_alg.cra_list),
 	.cra_u			=	{
 		.blkcipher = {
 			.min_keysize		=	DES3_192_KEY_SIZE,
 			.max_keysize		=	DES3_192_KEY_SIZE,
 			.ivsize			=	DES_BLOCK_SIZE,
 			.setkey			=	des3_192_setkey,
 			.encrypt		=	cbc_des3_192_encrypt,
 			.decrypt		=	cbc_des3_192_decrypt,
 		}
 	}
 };

 static int des_s390_init(void)
 {
 	int ret;

 	if (!crypt_s390_func_available(KM_DEA_ENCRYPT) ||
 	    !crypt_s390_func_available(KM_TDEA_192_ENCRYPT))
 		return -EOPNOTSUPP;

 	ret = crypto_register_alg(&des_alg);
 	if (ret)
 		goto des_err;
 	ret = crypto_register_alg(&ecb_des_alg);
 	if (ret)
 		goto ecb_des_err;
 	ret = crypto_register_alg(&cbc_des_alg);
 	if (ret)
 		goto cbc_des_err;
 	ret = crypto_register_alg(&des3_192_alg);
 	if (ret)
 		goto des3_192_err;
 	ret = crypto_register_alg(&ecb_des3_192_alg);
 	if (ret)
 		goto ecb_des3_192_err;
 	ret = crypto_register_alg(&cbc_des3_192_alg);
 	if (ret)
 		goto cbc_des3_192_err;
 out:
 	return ret;

 cbc_des3_192_err:
 	crypto_unregister_alg(&ecb_des3_192_alg);
 ecb_des3_192_err:
 	crypto_unregister_alg(&des3_192_alg);
 des3_192_err:
 	crypto_unregister_alg(&cbc_des_alg);
 cbc_des_err:
 	crypto_unregister_alg(&ecb_des_alg);
 ecb_des_err:
 	crypto_unregister_alg(&des_alg);
 des_err:
 	goto out;
 }

 static void __exit des_s390_exit(void)
 {
 	crypto_unregister_alg(&cbc_des3_192_alg);
 	crypto_unregister_alg(&ecb_des3_192_alg);
 	crypto_unregister_alg(&des3_192_alg);
 	crypto_unregister_alg(&cbc_des_alg);
 	crypto_unregister_alg(&ecb_des_alg);
 	crypto_unregister_alg(&des_alg);
 }

 module_init(des_s390_init);
 module_exit(des_s390_exit);

 MODULE_ALIAS("des");
 MODULE_ALIAS("des3_ede");

 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");
	/*
	* Cryptographic API.
	*
	* s390 implementation of the DES Cipher Algorithm.
	*
	* Copyright IBM Corp. 2003,2007
	* Author(s): Thomas Spatzier
	* Jan Glauber (jan.glauber@de.ibm.com)
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	*/

	#include <linux/init.h>
	#include <linux/module.h>
	#include <linux/crypto.h>
	#include <crypto/algapi.h>
	#include <crypto/des.h>

	#include "crypt_s390.h"

	#define DES3_192_KEY_SIZE (3 * DES_KEY_SIZE)

	struct crypt_s390_des_ctx {
	u8 iv[DES_BLOCK_SIZE];
	u8 key[DES_KEY_SIZE];
	};

	struct crypt_s390_des3_192_ctx {
	u8 iv[DES_BLOCK_SIZE];
	u8 key[DES3_192_KEY_SIZE];
	};

	static int des_setkey(struct crypto_tfm tfm, const u8 key,
	unsigned int keylen)
	{
	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
	u32 *flags = &tfm->crt_flags;
	u32 tmp[DES_EXPKEY_WORDS];

	/* check for weak keys */
	if (!des_ekey(tmp, key) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
	*flags \|= CRYPTO_TFM_RES_WEAK_KEY;
	return -EINVAL;
	}

	memcpy(dctx->key, key, keylen);
	return 0;
	}

	static void des_encrypt(struct crypto_tfm tfm, u8 out, const u8 *in)
	{
	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);

	crypt_s390_km(KM_DEA_ENCRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
	}

	static void des_decrypt(struct crypto_tfm tfm, u8 out, const u8 *in)
	{
	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);

	crypt_s390_km(KM_DEA_DECRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
	}

	static struct crypto_alg des_alg = {
	.cra_name = "des",
	.cra_driver_name = "des-s390",
	.cra_priority = CRYPT_S390_PRIORITY,
	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize = DES_BLOCK_SIZE,
	.cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
	.cra_module = THIS_MODULE,
	.cra_list = LIST_HEAD_INIT(des_alg.cra_list),
	.cra_u = {
	.cipher = {
	.cia_min_keysize = DES_KEY_SIZE,
	.cia_max_keysize = DES_KEY_SIZE,
	.cia_setkey = des_setkey,
	.cia_encrypt = des_encrypt,
	.cia_decrypt = des_decrypt,
	}
	}
	};

	static int ecb_desall_crypt(struct blkcipher_desc *desc, long func,
	void param, struct blkcipher_walk walk)
	{
	int ret = blkcipher_walk_virt(desc, walk);
	unsigned int nbytes;

	while ((nbytes = walk->nbytes)) {
	/* only use complete blocks */
	unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
	u8 *out = walk->dst.virt.addr;
	u8 *in = walk->src.virt.addr;

	ret = crypt_s390_km(func, param, out, in, n);
	BUG_ON((ret < 0) \|\| (ret != n));

	nbytes &= DES_BLOCK_SIZE - 1;
	ret = blkcipher_walk_done(desc, walk, nbytes);
	}

	return ret;
	}

	static int cbc_desall_crypt(struct blkcipher_desc *desc, long func,
	void param, struct blkcipher_walk walk)
	{
	int ret = blkcipher_walk_virt(desc, walk);
	unsigned int nbytes = walk->nbytes;

	if (!nbytes)
	goto out;

	memcpy(param, walk->iv, DES_BLOCK_SIZE);
	do {
	/* only use complete blocks */
	unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
	u8 *out = walk->dst.virt.addr;
	u8 *in = walk->src.virt.addr;

	ret = crypt_s390_kmc(func, param, out, in, n);
	BUG_ON((ret < 0) \|\| (ret != n));

	nbytes &= DES_BLOCK_SIZE - 1;
	ret = blkcipher_walk_done(desc, walk, nbytes);
	} while ((nbytes = walk->nbytes));
	memcpy(walk->iv, param, DES_BLOCK_SIZE);

	out:
	return ret;
	}

	static int ecb_des_encrypt(struct blkcipher_desc *desc,
	struct scatterlist dst, struct scatterlist src,
	unsigned int nbytes)
	{
	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, sctx->key, &walk);
	}

	static int ecb_des_decrypt(struct blkcipher_desc *desc,
	struct scatterlist dst, struct scatterlist src,
	unsigned int nbytes)
	{
	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	return ecb_desall_crypt(desc, KM_DEA_DECRYPT, sctx->key, &walk);
	}

	static struct crypto_alg ecb_des_alg = {
	.cra_name = "ecb(des)",
	.cra_driver_name = "ecb-des-s390",
	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize = DES_BLOCK_SIZE,
	.cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
	.cra_type = &crypto_blkcipher_type,
	.cra_module = THIS_MODULE,
	.cra_list = LIST_HEAD_INIT(ecb_des_alg.cra_list),
	.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 int cbc_des_encrypt(struct blkcipher_desc *desc,
	struct scatterlist dst, struct scatterlist src,
	unsigned int nbytes)
	{
	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, sctx->iv, &walk);
	}

	static int cbc_des_decrypt(struct blkcipher_desc *desc,
	struct scatterlist dst, struct scatterlist src,
	unsigned int nbytes)
	{
	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, sctx->iv, &walk);
	}

	static struct crypto_alg cbc_des_alg = {
	.cra_name = "cbc(des)",
	.cra_driver_name = "cbc-des-s390",
	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize = DES_BLOCK_SIZE,
	.cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
	.cra_type = &crypto_blkcipher_type,
	.cra_module = THIS_MODULE,
	.cra_list = LIST_HEAD_INIT(cbc_des_alg.cra_list),
	.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,
	}
	}
	};

	/*
	* RFC2451:
	*
	* For DES-EDE3, there is no known need to reject weak or
	* complementation keys. Any weakness is obviated by the use of
	* multiple keys.
	*
	* However, if the first two or last two independent 64-bit keys are
	* equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
	* same as DES. Implementers MUST reject keys that exhibit this
	* property.
	*
	*/
	static int des3_192_setkey(struct crypto_tfm tfm, const u8 key,
	unsigned int keylen)
	{
	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
	u32 *flags = &tfm->crt_flags;

	if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
	memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
	DES_KEY_SIZE)) &&
	(*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
	*flags \|= CRYPTO_TFM_RES_WEAK_KEY;
	return -EINVAL;
	}
	memcpy(dctx->key, key, keylen);
	return 0;
	}

	static void des3_192_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
	{
	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);

	crypt_s390_km(KM_TDEA_192_ENCRYPT, dctx->key, dst, (void*)src,
	DES_BLOCK_SIZE);
	}

	static void des3_192_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
	{
	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);

	crypt_s390_km(KM_TDEA_192_DECRYPT, dctx->key, dst, (void*)src,
	DES_BLOCK_SIZE);
	}

	static struct crypto_alg des3_192_alg = {
	.cra_name = "des3_ede",
	.cra_driver_name = "des3_ede-s390",
	.cra_priority = CRYPT_S390_PRIORITY,
	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize = DES_BLOCK_SIZE,
	.cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
	.cra_module = THIS_MODULE,
	.cra_list = LIST_HEAD_INIT(des3_192_alg.cra_list),
	.cra_u = {
	.cipher = {
	.cia_min_keysize = DES3_192_KEY_SIZE,
	.cia_max_keysize = DES3_192_KEY_SIZE,
	.cia_setkey = des3_192_setkey,
	.cia_encrypt = des3_192_encrypt,
	.cia_decrypt = des3_192_decrypt,
	}
	}
	};

	static int ecb_des3_192_encrypt(struct blkcipher_desc *desc,
	struct scatterlist *dst,
	struct scatterlist *src, unsigned int nbytes)
	{
	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, sctx->key, &walk);
	}

	static int ecb_des3_192_decrypt(struct blkcipher_desc *desc,
	struct scatterlist *dst,
	struct scatterlist *src, unsigned int nbytes)
	{
	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, sctx->key, &walk);
	}

	static struct crypto_alg ecb_des3_192_alg = {
	.cra_name = "ecb(des3_ede)",
	.cra_driver_name = "ecb-des3_ede-s390",
	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize = DES_BLOCK_SIZE,
	.cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
	.cra_type = &crypto_blkcipher_type,
	.cra_module = THIS_MODULE,
	.cra_list = LIST_HEAD_INIT(
	ecb_des3_192_alg.cra_list),
	.cra_u = {
	.blkcipher = {
	.min_keysize = DES3_192_KEY_SIZE,
	.max_keysize = DES3_192_KEY_SIZE,
	.setkey = des3_192_setkey,
	.encrypt = ecb_des3_192_encrypt,
	.decrypt = ecb_des3_192_decrypt,
	}
	}
	};

	static int cbc_des3_192_encrypt(struct blkcipher_desc *desc,
	struct scatterlist *dst,
	struct scatterlist *src, unsigned int nbytes)
	{
	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, sctx->iv, &walk);
	}

	static int cbc_des3_192_decrypt(struct blkcipher_desc *desc,
	struct scatterlist *dst,
	struct scatterlist *src, unsigned int nbytes)
	{
	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk walk;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, sctx->iv, &walk);
	}

	static struct crypto_alg cbc_des3_192_alg = {
	.cra_name = "cbc(des3_ede)",
	.cra_driver_name = "cbc-des3_ede-s390",
	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize = DES_BLOCK_SIZE,
	.cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
	.cra_type = &crypto_blkcipher_type,
	.cra_module = THIS_MODULE,
	.cra_list = LIST_HEAD_INIT(
	cbc_des3_192_alg.cra_list),
	.cra_u = {
	.blkcipher = {
	.min_keysize = DES3_192_KEY_SIZE,
	.max_keysize = DES3_192_KEY_SIZE,
	.ivsize = DES_BLOCK_SIZE,
	.setkey = des3_192_setkey,
	.encrypt = cbc_des3_192_encrypt,
	.decrypt = cbc_des3_192_decrypt,
	}
	}
	};

	static int des_s390_init(void)
	{
	int ret;

	if (!crypt_s390_func_available(KM_DEA_ENCRYPT) \|\|
	!crypt_s390_func_available(KM_TDEA_192_ENCRYPT))
	return -EOPNOTSUPP;

	ret = crypto_register_alg(&des_alg);
	if (ret)
	goto des_err;
	ret = crypto_register_alg(&ecb_des_alg);
	if (ret)
	goto ecb_des_err;
	ret = crypto_register_alg(&cbc_des_alg);
	if (ret)
	goto cbc_des_err;
	ret = crypto_register_alg(&des3_192_alg);
	if (ret)
	goto des3_192_err;
	ret = crypto_register_alg(&ecb_des3_192_alg);
	if (ret)
	goto ecb_des3_192_err;
	ret = crypto_register_alg(&cbc_des3_192_alg);
	if (ret)
	goto cbc_des3_192_err;
	out:
	return ret;

	cbc_des3_192_err:
	crypto_unregister_alg(&ecb_des3_192_alg);
	ecb_des3_192_err:
	crypto_unregister_alg(&des3_192_alg);
	des3_192_err:
	crypto_unregister_alg(&cbc_des_alg);
	cbc_des_err:
	crypto_unregister_alg(&ecb_des_alg);
	ecb_des_err:
	crypto_unregister_alg(&des_alg);
	des_err:
	goto out;
	}

	static void __exit des_s390_exit(void)
	{
	crypto_unregister_alg(&cbc_des3_192_alg);
	crypto_unregister_alg(&ecb_des3_192_alg);
	crypto_unregister_alg(&des3_192_alg);
	crypto_unregister_alg(&cbc_des_alg);
	crypto_unregister_alg(&ecb_des_alg);
	crypto_unregister_alg(&des_alg);
	}

	module_init(des_s390_init);
	module_exit(des_s390_exit);

	MODULE_ALIAS("des");
	MODULE_ALIAS("des3_ede");

	MODULE_LICENSE("GPL");
	MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");