[deliverable/linux.git] / arch / s390 / crypto / des_s390.c

/*
 * 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_MSA) ||
	    !crypt_s390_func_available(KM_TDEA_192_ENCRYPT, CRYPT_S390_MSA))
		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");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Cryptographic API.
	3	*
c1e26e1e	4	* s390 implementation of the DES Cipher Algorithm.
1da177e4	5	*
86aa9fc2 JG	6	* Copyright IBM Corp. 2003,2007
	7	* Author(s): Thomas Spatzier
	8	* Jan Glauber (jan.glauber@de.ibm.com)
1da177e4 LT	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	*/
a9e62fad	16
1da177e4 LT	17	#include <linux/init.h>
1da177e4 LT	18	#include <linux/module.h>
1efbd15c JG	19	#include <linux/crypto.h>
	20	#include <crypto/algapi.h>
	21	#include <crypto/des.h>
c1357833	22
c1e26e1e	23	#include "crypt_s390.h"
1da177e4	24
1da177e4	25	#define DES3_192_KEY_SIZE (3 * DES_KEY_SIZE)
1da177e4	26
c1e26e1e	27	struct crypt_s390_des_ctx {
1da177e4 LT	28	u8 iv[DES_BLOCK_SIZE];
	29	u8 key[DES_KEY_SIZE];
	30	};
	31
c1e26e1e	32	struct crypt_s390_des3_192_ctx {
1da177e4 LT	33	u8 iv[DES_BLOCK_SIZE];
	34	u8 key[DES3_192_KEY_SIZE];
	35	};
	36
6c2bb98b	37	static int des_setkey(struct crypto_tfm tfm, const u8 key,
560c06ae	38	unsigned int keylen)
1da177e4	39	{
6c2bb98b	40	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
560c06ae	41	u32 *flags = &tfm->crt_flags;
1efbd15c	42	u32 tmp[DES_EXPKEY_WORDS];
1da177e4	43
1efbd15c JG	44	/* check for weak keys */
	45	if (!des_ekey(tmp, key) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
	46	*flags \|= CRYPTO_TFM_RES_WEAK_KEY;
	47	return -EINVAL;
	48	}
	49
	50	memcpy(dctx->key, key, keylen);
	51	return 0;
1da177e4 LT	52	}
1da177e4 LT	53
6c2bb98b	54	static void des_encrypt(struct crypto_tfm tfm, u8 out, const u8 *in)
1da177e4	55	{
6c2bb98b	56	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
1da177e4	57
b8dc6038	58	crypt_s390_km(KM_DEA_ENCRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
1da177e4 LT	59	}
1da177e4 LT	60
6c2bb98b	61	static void des_decrypt(struct crypto_tfm tfm, u8 out, const u8 *in)
1da177e4	62	{
6c2bb98b	63	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
1da177e4	64
b8dc6038 JG	65	crypt_s390_km(KM_DEA_DECRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
	66	}
	67
1da177e4 LT	68	static struct crypto_alg des_alg = {
1da177e4 LT	69	.cra_name = "des",
65b75c36 HX	70	.cra_driver_name = "des-s390",
65b75c36 HX	71	.cra_priority = CRYPT_S390_PRIORITY,
1da177e4 LT	72	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
1da177e4 LT	73	.cra_blocksize = DES_BLOCK_SIZE,
c1e26e1e	74	.cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
1da177e4 LT	75	.cra_module = THIS_MODULE,
1da177e4 LT	76	.cra_list = LIST_HEAD_INIT(des_alg.cra_list),
c1357833 JG	77	.cra_u = {
	78	.cipher = {
	79	.cia_min_keysize = DES_KEY_SIZE,
	80	.cia_max_keysize = DES_KEY_SIZE,
	81	.cia_setkey = des_setkey,
	82	.cia_encrypt = des_encrypt,
b8dc6038	83	.cia_decrypt = des_decrypt,
c1357833 JG	84	}
c1357833 JG	85	}
1da177e4 LT	86	};
1da177e4 LT	87
a9e62fad HX	88	static int ecb_desall_crypt(struct blkcipher_desc *desc, long func,
	89	void param, struct blkcipher_walk walk)
	90	{
	91	int ret = blkcipher_walk_virt(desc, walk);
	92	unsigned int nbytes;
	93
	94	while ((nbytes = walk->nbytes)) {
	95	/* only use complete blocks */
	96	unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
	97	u8 *out = walk->dst.virt.addr;
	98	u8 *in = walk->src.virt.addr;
	99
	100	ret = crypt_s390_km(func, param, out, in, n);
	101	BUG_ON((ret < 0) \|\| (ret != n));
	102
	103	nbytes &= DES_BLOCK_SIZE - 1;
	104	ret = blkcipher_walk_done(desc, walk, nbytes);
	105	}
	106
	107	return ret;
	108	}
	109
	110	static int cbc_desall_crypt(struct blkcipher_desc *desc, long func,
	111	void param, struct blkcipher_walk walk)
	112	{
	113	int ret = blkcipher_walk_virt(desc, walk);
	114	unsigned int nbytes = walk->nbytes;
	115
	116	if (!nbytes)
	117	goto out;
	118
	119	memcpy(param, walk->iv, DES_BLOCK_SIZE);
	120	do {
	121	/* only use complete blocks */
	122	unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
	123	u8 *out = walk->dst.virt.addr;
	124	u8 *in = walk->src.virt.addr;
	125
	126	ret = crypt_s390_kmc(func, param, out, in, n);
	127	BUG_ON((ret < 0) \|\| (ret != n));
	128
	129	nbytes &= DES_BLOCK_SIZE - 1;
	130	ret = blkcipher_walk_done(desc, walk, nbytes);
	131	} while ((nbytes = walk->nbytes));
	132	memcpy(walk->iv, param, DES_BLOCK_SIZE);
	133
	134	out:
	135	return ret;
	136	}
	137
	138	static int ecb_des_encrypt(struct blkcipher_desc *desc,
	139	struct scatterlist dst, struct scatterlist src,
	140	unsigned int nbytes)
	141	{
	142	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	143	struct blkcipher_walk walk;
	144
	145	blkcipher_walk_init(&walk, dst, src, nbytes);
	146	return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, sctx->key, &walk);
	147	}
	148
	149	static int ecb_des_decrypt(struct blkcipher_desc *desc,
	150	struct scatterlist dst, struct scatterlist src,
	151	unsigned int nbytes)
152	{
153	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
154	struct blkcipher_walk walk;
155
156	blkcipher_walk_init(&walk, dst, src, nbytes);
157	return ecb_desall_crypt(desc, KM_DEA_DECRYPT, sctx->key, &walk);
158	}
159
160	static struct crypto_alg ecb_des_alg = {
161	.cra_name = "ecb(des)",
162	.cra_driver_name = "ecb-des-s390",
163	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
164	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
165	.cra_blocksize = DES_BLOCK_SIZE,
166	.cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
167	.cra_type = &crypto_blkcipher_type,
168	.cra_module = THIS_MODULE,
169	.cra_list = LIST_HEAD_INIT(ecb_des_alg.cra_list),
170	.cra_u = {
171	.blkcipher = {
172	.min_keysize = DES_KEY_SIZE,
173	.max_keysize = DES_KEY_SIZE,
174	.setkey = des_setkey,
175	.encrypt = ecb_des_encrypt,
176	.decrypt = ecb_des_decrypt,
177	}
178	}
179	};
180
181	static int cbc_des_encrypt(struct blkcipher_desc *desc,
182	struct scatterlist dst, struct scatterlist src,
183	unsigned int nbytes)
184	{
185	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
186	struct blkcipher_walk walk;
187
188	blkcipher_walk_init(&walk, dst, src, nbytes);
189	return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, sctx->iv, &walk);
190	}
191
192	static int cbc_des_decrypt(struct blkcipher_desc *desc,
193	struct scatterlist dst, struct scatterlist src,
194	unsigned int nbytes)
195	{
196	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
197	struct blkcipher_walk walk;
198
199	blkcipher_walk_init(&walk, dst, src, nbytes);
200	return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, sctx->iv, &walk);
201	}
202
203	static struct crypto_alg cbc_des_alg = {
204	.cra_name = "cbc(des)",
205	.cra_driver_name = "cbc-des-s390",
206	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
207	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
208	.cra_blocksize = DES_BLOCK_SIZE,
209	.cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
210	.cra_type = &crypto_blkcipher_type,
211	.cra_module = THIS_MODULE,
212	.cra_list = LIST_HEAD_INIT(cbc_des_alg.cra_list),
213	.cra_u = {
214	.blkcipher = {
215	.min_keysize = DES_KEY_SIZE,
216	.max_keysize = DES_KEY_SIZE,
217	.ivsize = DES_BLOCK_SIZE,
218	.setkey = des_setkey,
219	.encrypt = cbc_des_encrypt,
220	.decrypt = cbc_des_decrypt,
221	}
222	}
223	};
224
1da177e4 LT	225	/*
	226	* RFC2451:
	227	*
	228	* For DES-EDE3, there is no known need to reject weak or
	229	* complementation keys. Any weakness is obviated by the use of
	230	* multiple keys.
	231	*
	232	* However, if the first two or last two independent 64-bit keys are
	233	* equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
	234	* same as DES. Implementers MUST reject keys that exhibit this
	235	* property.
	236	*
	237	*/
6c2bb98b	238	static int des3_192_setkey(struct crypto_tfm tfm, const u8 key,
560c06ae	239	unsigned int keylen)
1da177e4	240	{
6c2bb98b	241	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
560c06ae	242	u32 *flags = &tfm->crt_flags;
1da177e4	243
1da177e4 LT	244	if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
1da177e4 LT	245	memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
03b56ce5 JW	246	DES_KEY_SIZE)) &&
	247	(*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
	248	*flags \|= CRYPTO_TFM_RES_WEAK_KEY;
1da177e4 LT	249	return -EINVAL;
1da177e4 LT	250	}
1da177e4 LT	251	memcpy(dctx->key, key, keylen);
	252	return 0;
	253	}
	254
6c2bb98b	255	static void des3_192_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
1da177e4	256	{
6c2bb98b	257	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
1da177e4	258
c1e26e1e	259	crypt_s390_km(KM_TDEA_192_ENCRYPT, dctx->key, dst, (void*)src,
1efbd15c	260	DES_BLOCK_SIZE);
1da177e4 LT	261	}
1da177e4 LT	262
6c2bb98b	263	static void des3_192_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
1da177e4	264	{
6c2bb98b	265	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
1da177e4	266
c1e26e1e	267	crypt_s390_km(KM_TDEA_192_DECRYPT, dctx->key, dst, (void*)src,
1efbd15c	268	DES_BLOCK_SIZE);
1da177e4 LT	269	}
	270
	271	static struct crypto_alg des3_192_alg = {
	272	.cra_name = "des3_ede",
65b75c36 HX	273	.cra_driver_name = "des3_ede-s390",
65b75c36 HX	274	.cra_priority = CRYPT_S390_PRIORITY,
1da177e4	275	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
1efbd15c	276	.cra_blocksize = DES_BLOCK_SIZE,
c1e26e1e	277	.cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
1da177e4 LT	278	.cra_module = THIS_MODULE,
1da177e4 LT	279	.cra_list = LIST_HEAD_INIT(des3_192_alg.cra_list),
c1357833 JG	280	.cra_u = {
	281	.cipher = {
	282	.cia_min_keysize = DES3_192_KEY_SIZE,
	283	.cia_max_keysize = DES3_192_KEY_SIZE,
	284	.cia_setkey = des3_192_setkey,
	285	.cia_encrypt = des3_192_encrypt,
b8dc6038	286	.cia_decrypt = des3_192_decrypt,
c1357833 JG	287	}
c1357833 JG	288	}
1da177e4 LT	289	};
1da177e4 LT	290
a9e62fad HX	291	static int ecb_des3_192_encrypt(struct blkcipher_desc *desc,
	292	struct scatterlist *dst,
	293	struct scatterlist *src, unsigned int nbytes)
	294	{
	295	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	296	struct blkcipher_walk walk;
	297
	298	blkcipher_walk_init(&walk, dst, src, nbytes);
	299	return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, sctx->key, &walk);
	300	}
	301
	302	static int ecb_des3_192_decrypt(struct blkcipher_desc *desc,
	303	struct scatterlist *dst,
	304	struct scatterlist *src, unsigned int nbytes)
	305	{
	306	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	307	struct blkcipher_walk walk;
	308
	309	blkcipher_walk_init(&walk, dst, src, nbytes);
	310	return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, sctx->key, &walk);
	311	}
	312
	313	static struct crypto_alg ecb_des3_192_alg = {
	314	.cra_name = "ecb(des3_ede)",
	315	.cra_driver_name = "ecb-des3_ede-s390",
	316	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
	317	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
1efbd15c	318	.cra_blocksize = DES_BLOCK_SIZE,
a9e62fad HX	319	.cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
	320	.cra_type = &crypto_blkcipher_type,
	321	.cra_module = THIS_MODULE,
	322	.cra_list = LIST_HEAD_INIT(
	323	ecb_des3_192_alg.cra_list),
	324	.cra_u = {
	325	.blkcipher = {
	326	.min_keysize = DES3_192_KEY_SIZE,
	327	.max_keysize = DES3_192_KEY_SIZE,
	328	.setkey = des3_192_setkey,
	329	.encrypt = ecb_des3_192_encrypt,
	330	.decrypt = ecb_des3_192_decrypt,
	331	}
	332	}
	333	};
	334
	335	static int cbc_des3_192_encrypt(struct blkcipher_desc *desc,
	336	struct scatterlist *dst,
	337	struct scatterlist *src, unsigned int nbytes)
	338	{
	339	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	340	struct blkcipher_walk walk;
	341
	342	blkcipher_walk_init(&walk, dst, src, nbytes);
	343	return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, sctx->iv, &walk);
	344	}
	345
	346	static int cbc_des3_192_decrypt(struct blkcipher_desc *desc,
	347	struct scatterlist *dst,
	348	struct scatterlist *src, unsigned int nbytes)
	349	{
	350	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	351	struct blkcipher_walk walk;
	352
	353	blkcipher_walk_init(&walk, dst, src, nbytes);
	354	return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, sctx->iv, &walk);
	355	}
	356
	357	static struct crypto_alg cbc_des3_192_alg = {
	358	.cra_name = "cbc(des3_ede)",
	359	.cra_driver_name = "cbc-des3_ede-s390",
	360	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
	361	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
1efbd15c	362	.cra_blocksize = DES_BLOCK_SIZE,
a9e62fad HX	363	.cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
	364	.cra_type = &crypto_blkcipher_type,
	365	.cra_module = THIS_MODULE,
	366	.cra_list = LIST_HEAD_INIT(
	367	cbc_des3_192_alg.cra_list),
	368	.cra_u = {
	369	.blkcipher = {
	370	.min_keysize = DES3_192_KEY_SIZE,
	371	.max_keysize = DES3_192_KEY_SIZE,
1efbd15c	372	.ivsize = DES_BLOCK_SIZE,
a9e62fad HX	373	.setkey = des3_192_setkey,
	374	.encrypt = cbc_des3_192_encrypt,
	375	.decrypt = cbc_des3_192_decrypt,
	376	}
	377	}
	378	};
	379
9f7819c1	380	static int des_s390_init(void)
1da177e4	381	{
80d663a4	382	int ret;
1da177e4	383
1822bc90 JG	384	if (!crypt_s390_func_available(KM_DEA_ENCRYPT, CRYPT_S390_MSA) \|\|
1822bc90 JG	385	!crypt_s390_func_available(KM_TDEA_192_ENCRYPT, CRYPT_S390_MSA))
86aa9fc2	386	return -EOPNOTSUPP;
1da177e4	387
a9e62fad HX	388	ret = crypto_register_alg(&des_alg);
	389	if (ret)
	390	goto des_err;
	391	ret = crypto_register_alg(&ecb_des_alg);
	392	if (ret)
	393	goto ecb_des_err;
	394	ret = crypto_register_alg(&cbc_des_alg);
	395	if (ret)
	396	goto cbc_des_err;
a9e62fad HX	397	ret = crypto_register_alg(&des3_192_alg);
	398	if (ret)
	399	goto des3_192_err;
	400	ret = crypto_register_alg(&ecb_des3_192_alg);
	401	if (ret)
	402	goto ecb_des3_192_err;
	403	ret = crypto_register_alg(&cbc_des3_192_alg);
	404	if (ret)
	405	goto cbc_des3_192_err;
a9e62fad HX	406	out:
	407	return ret;
	408
	409	cbc_des3_192_err:
	410	crypto_unregister_alg(&ecb_des3_192_alg);
	411	ecb_des3_192_err:
	412	crypto_unregister_alg(&des3_192_alg);
	413	des3_192_err:
a9e62fad HX	414	crypto_unregister_alg(&cbc_des_alg);
	415	cbc_des_err:
	416	crypto_unregister_alg(&ecb_des_alg);
	417	ecb_des_err:
	418	crypto_unregister_alg(&des_alg);
	419	des_err:
	420	goto out;
1da177e4 LT	421	}
1da177e4 LT	422
1efbd15c	423	static void __exit des_s390_exit(void)
1da177e4	424	{
a9e62fad HX	425	crypto_unregister_alg(&cbc_des3_192_alg);
a9e62fad HX	426	crypto_unregister_alg(&ecb_des3_192_alg);
1da177e4	427	crypto_unregister_alg(&des3_192_alg);
a9e62fad HX	428	crypto_unregister_alg(&cbc_des_alg);
a9e62fad HX	429	crypto_unregister_alg(&ecb_des_alg);
1da177e4 LT	430	crypto_unregister_alg(&des_alg);
	431	}
	432
9f7819c1	433	module_init(des_s390_init);
1efbd15c	434	module_exit(des_s390_exit);
1da177e4 LT	435
	436	MODULE_ALIAS("des");
	437	MODULE_ALIAS("des3_ede");
	438
	439	MODULE_LICENSE("GPL");
	440	MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");