[linux-2.6-block.git] / arch / s390 / crypto / des_s390.c

/*
 * Cryptographic API.
 *
 * s390 implementation of the DES Cipher Algorithm.
 *
 * Copyright (c) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
 * Author(s): Thomas Spatzier (tspat@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 <crypto/algapi.h>
#include <linux/init.h>
#include <linux/module.h>

#include "crypt_s390.h"
#include "crypto_des.h"

#define DES_BLOCK_SIZE 8
#define DES_KEY_SIZE 8

#define DES3_128_KEY_SIZE	(2 * DES_KEY_SIZE)
#define DES3_128_BLOCK_SIZE	DES_BLOCK_SIZE

#define DES3_192_KEY_SIZE	(3 * DES_KEY_SIZE)
#define DES3_192_BLOCK_SIZE	DES_BLOCK_SIZE

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

struct crypt_s390_des3_128_ctx {
	u8 iv[DES_BLOCK_SIZE];
	u8 key[DES3_128_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;
	int ret;

	/* test if key is valid (not a weak key) */
	ret = crypto_des_check_key(key, keylen, flags);
	if (ret == 0)
		memcpy(dctx->key, key, keylen);
	return ret;
}

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 two  independent 64-bit keys are equal,
 *   then the DES3 operation is simply the same as DES.
 *   Implementers MUST reject keys that exhibit this property.
 *
 */
static int des3_128_setkey(struct crypto_tfm *tfm, const u8 *key,
			   unsigned int keylen)
{
	int i, ret;
	struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
	const u8 *temp_key = key;
	u32 *flags = &tfm->crt_flags;

	if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE))) {
		*flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
		return -EINVAL;
	}
	for (i = 0; i < 2; i++, temp_key += DES_KEY_SIZE) {
		ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
		if (ret < 0)
			return ret;
	}
	memcpy(dctx->key, key, keylen);
	return 0;
}

static void des3_128_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);

	crypt_s390_km(KM_TDEA_128_ENCRYPT, dctx->key, dst, (void*)src,
		      DES3_128_BLOCK_SIZE);
}

static void des3_128_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);

	crypt_s390_km(KM_TDEA_128_DECRYPT, dctx->key, dst, (void*)src,
		      DES3_128_BLOCK_SIZE);
}

static struct crypto_alg des3_128_alg = {
	.cra_name		=	"des3_ede128",
	.cra_driver_name	=	"des3_ede128-s390",
	.cra_priority		=	CRYPT_S390_PRIORITY,
	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize		=	DES3_128_BLOCK_SIZE,
	.cra_ctxsize		=	sizeof(struct crypt_s390_des3_128_ctx),
	.cra_module		=	THIS_MODULE,
	.cra_list		=	LIST_HEAD_INIT(des3_128_alg.cra_list),
	.cra_u			=	{
		.cipher = {
			.cia_min_keysize	=	DES3_128_KEY_SIZE,
			.cia_max_keysize	=	DES3_128_KEY_SIZE,
			.cia_setkey		=	des3_128_setkey,
			.cia_encrypt		=	des3_128_encrypt,
			.cia_decrypt		=	des3_128_decrypt,
		}
	}
};

static int ecb_des3_128_encrypt(struct blkcipher_desc *desc,
				struct scatterlist *dst,
				struct scatterlist *src, unsigned int nbytes)
{
	struct crypt_s390_des3_128_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_128_ENCRYPT, sctx->key, &walk);
}

static int ecb_des3_128_decrypt(struct blkcipher_desc *desc,
				struct scatterlist *dst,
				struct scatterlist *src, unsigned int nbytes)
{
	struct crypt_s390_des3_128_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_128_DECRYPT, sctx->key, &walk);
}

static struct crypto_alg ecb_des3_128_alg = {
	.cra_name		=	"ecb(des3_ede128)",
	.cra_driver_name	=	"ecb-des3_ede128-s390",
	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize		=	DES3_128_BLOCK_SIZE,
	.cra_ctxsize		=	sizeof(struct crypt_s390_des3_128_ctx),
	.cra_type		=	&crypto_blkcipher_type,
	.cra_module		=	THIS_MODULE,
	.cra_list		=	LIST_HEAD_INIT(
						ecb_des3_128_alg.cra_list),
	.cra_u			=	{
		.blkcipher = {
			.min_keysize		=	DES3_128_KEY_SIZE,
			.max_keysize		=	DES3_128_KEY_SIZE,
			.setkey			=	des3_128_setkey,
			.encrypt		=	ecb_des3_128_encrypt,
			.decrypt		=	ecb_des3_128_decrypt,
		}
	}
};

static int cbc_des3_128_encrypt(struct blkcipher_desc *desc,
				struct scatterlist *dst,
				struct scatterlist *src, unsigned int nbytes)
{
	struct crypt_s390_des3_128_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_128_ENCRYPT, sctx->iv, &walk);
}

static int cbc_des3_128_decrypt(struct blkcipher_desc *desc,
				struct scatterlist *dst,
				struct scatterlist *src, unsigned int nbytes)
{
	struct crypt_s390_des3_128_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_128_DECRYPT, sctx->iv, &walk);
}

static struct crypto_alg cbc_des3_128_alg = {
	.cra_name		=	"cbc(des3_ede128)",
	.cra_driver_name	=	"cbc-des3_ede128-s390",
	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize		=	DES3_128_BLOCK_SIZE,
	.cra_ctxsize		=	sizeof(struct crypt_s390_des3_128_ctx),
	.cra_type		=	&crypto_blkcipher_type,
	.cra_module		=	THIS_MODULE,
	.cra_list		=	LIST_HEAD_INIT(
						cbc_des3_128_alg.cra_list),
	.cra_u			=	{
		.blkcipher = {
			.min_keysize		=	DES3_128_KEY_SIZE,
			.max_keysize		=	DES3_128_KEY_SIZE,
			.ivsize			=	DES3_128_BLOCK_SIZE,
			.setkey			=	des3_128_setkey,
			.encrypt		=	cbc_des3_128_encrypt,
			.decrypt		=	cbc_des3_128_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)
{
	int i, ret;
	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
	const u8 *temp_key = key;
	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_RES_BAD_KEY_SCHED;
		return -EINVAL;
	}
	for (i = 0; i < 3; i++, temp_key += DES_KEY_SIZE) {
		ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
		if (ret < 0)
			return ret;
	}
	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,
		      DES3_192_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,
		      DES3_192_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		=	DES3_192_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		=	DES3_192_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		=	DES3_192_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			=	DES3_192_BLOCK_SIZE,
			.setkey			=	des3_192_setkey,
			.encrypt		=	cbc_des3_192_encrypt,
			.decrypt		=	cbc_des3_192_decrypt,
		}
	}
};

static int init(void)
{
	int ret = 0;

	if (!crypt_s390_func_available(KM_DEA_ENCRYPT) ||
	    !crypt_s390_func_available(KM_TDEA_128_ENCRYPT) ||
	    !crypt_s390_func_available(KM_TDEA_192_ENCRYPT))
		return -ENOSYS;

	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_128_alg);
	if (ret)
		goto des3_128_err;
	ret = crypto_register_alg(&ecb_des3_128_alg);
	if (ret)
		goto ecb_des3_128_err;
	ret = crypto_register_alg(&cbc_des3_128_alg);
	if (ret)
		goto cbc_des3_128_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_des3_128_alg);
cbc_des3_128_err:
	crypto_unregister_alg(&ecb_des3_128_alg);
ecb_des3_128_err:
	crypto_unregister_alg(&des3_128_alg);
des3_128_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 fini(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_des3_128_alg);
	crypto_unregister_alg(&ecb_des3_128_alg);
	crypto_unregister_alg(&des3_128_alg);
	crypto_unregister_alg(&cbc_des_alg);
	crypto_unregister_alg(&ecb_des_alg);
	crypto_unregister_alg(&des_alg);
}

module_init(init);
module_exit(fini);

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 LT	5	*
	6	* Copyright (c) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
	7	* Author(s): Thomas Spatzier (tspat@de.ibm.com)
	8	*
	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 HX	16
a9e62fad HX	17	#include <crypto/algapi.h>
1da177e4 LT	18	#include <linux/init.h>
1da177e4 LT	19	#include <linux/module.h>
c1357833	20
c1e26e1e	21	#include "crypt_s390.h"
1da177e4 LT	22	#include "crypto_des.h"
	23
	24	#define DES_BLOCK_SIZE 8
	25	#define DES_KEY_SIZE 8
	26
	27	#define DES3_128_KEY_SIZE (2 * DES_KEY_SIZE)
	28	#define DES3_128_BLOCK_SIZE DES_BLOCK_SIZE
	29
	30	#define DES3_192_KEY_SIZE (3 * DES_KEY_SIZE)
	31	#define DES3_192_BLOCK_SIZE DES_BLOCK_SIZE
	32
c1e26e1e	33	struct crypt_s390_des_ctx {
1da177e4 LT	34	u8 iv[DES_BLOCK_SIZE];
	35	u8 key[DES_KEY_SIZE];
	36	};
	37
c1e26e1e	38	struct crypt_s390_des3_128_ctx {
1da177e4 LT	39	u8 iv[DES_BLOCK_SIZE];
	40	u8 key[DES3_128_KEY_SIZE];
	41	};
	42
c1e26e1e	43	struct crypt_s390_des3_192_ctx {
1da177e4 LT	44	u8 iv[DES_BLOCK_SIZE];
	45	u8 key[DES3_192_KEY_SIZE];
	46	};
	47
6c2bb98b	48	static int des_setkey(struct crypto_tfm tfm, const u8 key,
560c06ae	49	unsigned int keylen)
1da177e4	50	{
6c2bb98b	51	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
560c06ae	52	u32 *flags = &tfm->crt_flags;
1da177e4 LT	53	int ret;
1da177e4 LT	54
c1357833	55	/* test if key is valid (not a weak key) */
1da177e4	56	ret = crypto_des_check_key(key, keylen, flags);
c1357833	57	if (ret == 0)
1da177e4	58	memcpy(dctx->key, key, keylen);
1da177e4 LT	59	return ret;
	60	}
	61
6c2bb98b	62	static void des_encrypt(struct crypto_tfm tfm, u8 out, const u8 *in)
1da177e4	63	{
6c2bb98b	64	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
1da177e4	65
b8dc6038	66	crypt_s390_km(KM_DEA_ENCRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
1da177e4 LT	67	}
1da177e4 LT	68
6c2bb98b	69	static void des_decrypt(struct crypto_tfm tfm, u8 out, const u8 *in)
1da177e4	70	{
6c2bb98b	71	struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
1da177e4	72
b8dc6038 JG	73	crypt_s390_km(KM_DEA_DECRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
	74	}
	75
1da177e4 LT	76	static struct crypto_alg des_alg = {
1da177e4 LT	77	.cra_name = "des",
65b75c36 HX	78	.cra_driver_name = "des-s390",
65b75c36 HX	79	.cra_priority = CRYPT_S390_PRIORITY,
1da177e4 LT	80	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
1da177e4 LT	81	.cra_blocksize = DES_BLOCK_SIZE,
c1e26e1e	82	.cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
1da177e4 LT	83	.cra_module = THIS_MODULE,
1da177e4 LT	84	.cra_list = LIST_HEAD_INIT(des_alg.cra_list),
c1357833 JG	85	.cra_u = {
	86	.cipher = {
	87	.cia_min_keysize = DES_KEY_SIZE,
	88	.cia_max_keysize = DES_KEY_SIZE,
	89	.cia_setkey = des_setkey,
	90	.cia_encrypt = des_encrypt,
b8dc6038	91	.cia_decrypt = des_decrypt,
c1357833 JG	92	}
c1357833 JG	93	}
1da177e4 LT	94	};
1da177e4 LT	95
a9e62fad HX	96	static int ecb_desall_crypt(struct blkcipher_desc *desc, long func,
	97	void param, struct blkcipher_walk walk)
	98	{
	99	int ret = blkcipher_walk_virt(desc, walk);
	100	unsigned int nbytes;
	101
	102	while ((nbytes = walk->nbytes)) {
	103	/* only use complete blocks */
	104	unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
	105	u8 *out = walk->dst.virt.addr;
	106	u8 *in = walk->src.virt.addr;
	107
	108	ret = crypt_s390_km(func, param, out, in, n);
	109	BUG_ON((ret < 0) \|\| (ret != n));
	110
	111	nbytes &= DES_BLOCK_SIZE - 1;
	112	ret = blkcipher_walk_done(desc, walk, nbytes);
	113	}
	114
	115	return ret;
	116	}
	117
	118	static int cbc_desall_crypt(struct blkcipher_desc *desc, long func,
	119	void param, struct blkcipher_walk walk)
	120	{
	121	int ret = blkcipher_walk_virt(desc, walk);
	122	unsigned int nbytes = walk->nbytes;
	123
	124	if (!nbytes)
	125	goto out;
	126
	127	memcpy(param, walk->iv, DES_BLOCK_SIZE);
	128	do {
	129	/* only use complete blocks */
	130	unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
	131	u8 *out = walk->dst.virt.addr;
	132	u8 *in = walk->src.virt.addr;
	133
	134	ret = crypt_s390_kmc(func, param, out, in, n);
	135	BUG_ON((ret < 0) \|\| (ret != n));
	136
	137	nbytes &= DES_BLOCK_SIZE - 1;
	138	ret = blkcipher_walk_done(desc, walk, nbytes);
	139	} while ((nbytes = walk->nbytes));
	140	memcpy(walk->iv, param, DES_BLOCK_SIZE);
	141
	142	out:
	143	return ret;
	144	}
	145
	146	static int ecb_des_encrypt(struct blkcipher_desc *desc,
	147	struct scatterlist dst, struct scatterlist src,
	148	unsigned int nbytes)
	149	{
	150	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	151	struct blkcipher_walk walk;
	152
	153	blkcipher_walk_init(&walk, dst, src, nbytes);
	154	return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, sctx->key, &walk);
	155	}
	156
	157	static int ecb_des_decrypt(struct blkcipher_desc *desc,
	158	struct scatterlist dst, struct scatterlist src,
	159	unsigned int nbytes)
160	{
161	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
162	struct blkcipher_walk walk;
163
164	blkcipher_walk_init(&walk, dst, src, nbytes);
165	return ecb_desall_crypt(desc, KM_DEA_DECRYPT, sctx->key, &walk);
166	}
167
168	static struct crypto_alg ecb_des_alg = {
169	.cra_name = "ecb(des)",
170	.cra_driver_name = "ecb-des-s390",
171	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
172	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
173	.cra_blocksize = DES_BLOCK_SIZE,
174	.cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
175	.cra_type = &crypto_blkcipher_type,
176	.cra_module = THIS_MODULE,
177	.cra_list = LIST_HEAD_INIT(ecb_des_alg.cra_list),
178	.cra_u = {
179	.blkcipher = {
180	.min_keysize = DES_KEY_SIZE,
181	.max_keysize = DES_KEY_SIZE,
182	.setkey = des_setkey,
183	.encrypt = ecb_des_encrypt,
184	.decrypt = ecb_des_decrypt,
185	}
186	}
187	};
188
189	static int cbc_des_encrypt(struct blkcipher_desc *desc,
190	struct scatterlist dst, struct scatterlist src,
191	unsigned int nbytes)
192	{
193	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
194	struct blkcipher_walk walk;
195
196	blkcipher_walk_init(&walk, dst, src, nbytes);
197	return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, sctx->iv, &walk);
198	}
199
200	static int cbc_des_decrypt(struct blkcipher_desc *desc,
201	struct scatterlist dst, struct scatterlist src,
202	unsigned int nbytes)
203	{
204	struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
205	struct blkcipher_walk walk;
206
207	blkcipher_walk_init(&walk, dst, src, nbytes);
208	return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, sctx->iv, &walk);
209	}
210
211	static struct crypto_alg cbc_des_alg = {
212	.cra_name = "cbc(des)",
213	.cra_driver_name = "cbc-des-s390",
214	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
215	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
216	.cra_blocksize = DES_BLOCK_SIZE,
217	.cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
218	.cra_type = &crypto_blkcipher_type,
219	.cra_module = THIS_MODULE,
220	.cra_list = LIST_HEAD_INIT(cbc_des_alg.cra_list),
221	.cra_u = {
222	.blkcipher = {
223	.min_keysize = DES_KEY_SIZE,
224	.max_keysize = DES_KEY_SIZE,
225	.ivsize = DES_BLOCK_SIZE,
226	.setkey = des_setkey,
227	.encrypt = cbc_des_encrypt,
228	.decrypt = cbc_des_decrypt,
229	}
230	}
231	};
232
1da177e4 LT	233	/*
	234	* RFC2451:
	235	*
	236	* For DES-EDE3, there is no known need to reject weak or
	237	* complementation keys. Any weakness is obviated by the use of
	238	* multiple keys.
	239	*
	240	* However, if the two independent 64-bit keys are equal,
	241	* then the DES3 operation is simply the same as DES.
	242	* Implementers MUST reject keys that exhibit this property.
	243	*
	244	*/
6c2bb98b	245	static int des3_128_setkey(struct crypto_tfm tfm, const u8 key,
560c06ae	246	unsigned int keylen)
1da177e4 LT	247	{
1da177e4 LT	248	int i, ret;
6c2bb98b	249	struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
560c06ae HX	250	const u8 *temp_key = key;
560c06ae HX	251	u32 *flags = &tfm->crt_flags;
1da177e4	252
1da177e4	253	if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE))) {
1da177e4 LT	254	*flags \|= CRYPTO_TFM_RES_BAD_KEY_SCHED;
	255	return -EINVAL;
	256	}
c1357833	257	for (i = 0; i < 2; i++, temp_key += DES_KEY_SIZE) {
1da177e4 LT	258	ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
	259	if (ret < 0)
	260	return ret;
	261	}
	262	memcpy(dctx->key, key, keylen);
	263	return 0;
	264	}
	265
6c2bb98b	266	static void des3_128_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
1da177e4	267	{
6c2bb98b	268	struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
1da177e4	269
c1e26e1e	270	crypt_s390_km(KM_TDEA_128_ENCRYPT, dctx->key, dst, (void*)src,
c1357833	271	DES3_128_BLOCK_SIZE);
1da177e4 LT	272	}
1da177e4 LT	273
6c2bb98b	274	static void des3_128_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
1da177e4	275	{
6c2bb98b	276	struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
1da177e4	277
c1e26e1e	278	crypt_s390_km(KM_TDEA_128_DECRYPT, dctx->key, dst, (void*)src,
c1357833	279	DES3_128_BLOCK_SIZE);
1da177e4 LT	280	}
	281
	282	static struct crypto_alg des3_128_alg = {
	283	.cra_name = "des3_ede128",
65b75c36 HX	284	.cra_driver_name = "des3_ede128-s390",
65b75c36 HX	285	.cra_priority = CRYPT_S390_PRIORITY,
1da177e4 LT	286	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
1da177e4 LT	287	.cra_blocksize = DES3_128_BLOCK_SIZE,
c1e26e1e	288	.cra_ctxsize = sizeof(struct crypt_s390_des3_128_ctx),
1da177e4 LT	289	.cra_module = THIS_MODULE,
1da177e4 LT	290	.cra_list = LIST_HEAD_INIT(des3_128_alg.cra_list),
c1357833 JG	291	.cra_u = {
	292	.cipher = {
	293	.cia_min_keysize = DES3_128_KEY_SIZE,
	294	.cia_max_keysize = DES3_128_KEY_SIZE,
	295	.cia_setkey = des3_128_setkey,
	296	.cia_encrypt = des3_128_encrypt,
b8dc6038	297	.cia_decrypt = des3_128_decrypt,
c1357833 JG	298	}
c1357833 JG	299	}
1da177e4 LT	300	};
1da177e4 LT	301
a9e62fad HX	302	static int ecb_des3_128_encrypt(struct blkcipher_desc *desc,
	303	struct scatterlist *dst,
	304	struct scatterlist *src, unsigned int nbytes)
	305	{
	306	struct crypt_s390_des3_128_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_128_ENCRYPT, sctx->key, &walk);
	311	}
	312
	313	static int ecb_des3_128_decrypt(struct blkcipher_desc *desc,
	314	struct scatterlist *dst,
	315	struct scatterlist *src, unsigned int nbytes)
	316	{
	317	struct crypt_s390_des3_128_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	318	struct blkcipher_walk walk;
	319
	320	blkcipher_walk_init(&walk, dst, src, nbytes);
	321	return ecb_desall_crypt(desc, KM_TDEA_128_DECRYPT, sctx->key, &walk);
	322	}
	323
	324	static struct crypto_alg ecb_des3_128_alg = {
	325	.cra_name = "ecb(des3_ede128)",
	326	.cra_driver_name = "ecb-des3_ede128-s390",
	327	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
	328	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	329	.cra_blocksize = DES3_128_BLOCK_SIZE,
	330	.cra_ctxsize = sizeof(struct crypt_s390_des3_128_ctx),
	331	.cra_type = &crypto_blkcipher_type,
	332	.cra_module = THIS_MODULE,
	333	.cra_list = LIST_HEAD_INIT(
	334	ecb_des3_128_alg.cra_list),
	335	.cra_u = {
	336	.blkcipher = {
	337	.min_keysize = DES3_128_KEY_SIZE,
	338	.max_keysize = DES3_128_KEY_SIZE,
	339	.setkey = des3_128_setkey,
	340	.encrypt = ecb_des3_128_encrypt,
	341	.decrypt = ecb_des3_128_decrypt,
	342	}
	343	}
	344	};
	345
	346	static int cbc_des3_128_encrypt(struct blkcipher_desc *desc,
	347	struct scatterlist *dst,
	348	struct scatterlist *src, unsigned int nbytes)
	349	{
	350	struct crypt_s390_des3_128_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_128_ENCRYPT, sctx->iv, &walk);
	355	}
	356
	357	static int cbc_des3_128_decrypt(struct blkcipher_desc *desc,
	358	struct scatterlist *dst,
	359	struct scatterlist *src, unsigned int nbytes)
	360	{
	361	struct crypt_s390_des3_128_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	362	struct blkcipher_walk walk;
	363
	364	blkcipher_walk_init(&walk, dst, src, nbytes);
	365	return cbc_desall_crypt(desc, KMC_TDEA_128_DECRYPT, sctx->iv, &walk);
366	}
367
368	static struct crypto_alg cbc_des3_128_alg = {
369	.cra_name = "cbc(des3_ede128)",
370	.cra_driver_name = "cbc-des3_ede128-s390",
371	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
372	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
373	.cra_blocksize = DES3_128_BLOCK_SIZE,
374	.cra_ctxsize = sizeof(struct crypt_s390_des3_128_ctx),
375	.cra_type = &crypto_blkcipher_type,
376	.cra_module = THIS_MODULE,
377	.cra_list = LIST_HEAD_INIT(
378	cbc_des3_128_alg.cra_list),
379	.cra_u = {
380	.blkcipher = {
381	.min_keysize = DES3_128_KEY_SIZE,
382	.max_keysize = DES3_128_KEY_SIZE,
383	.ivsize = DES3_128_BLOCK_SIZE,
384	.setkey = des3_128_setkey,
385	.encrypt = cbc_des3_128_encrypt,
386	.decrypt = cbc_des3_128_decrypt,
387	}
388	}
389	};
390
1da177e4 LT	391	/*
	392	* RFC2451:
	393	*
	394	* For DES-EDE3, there is no known need to reject weak or
	395	* complementation keys. Any weakness is obviated by the use of
	396	* multiple keys.
	397	*
	398	* However, if the first two or last two independent 64-bit keys are
	399	* equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
	400	* same as DES. Implementers MUST reject keys that exhibit this
	401	* property.
	402	*
	403	*/
6c2bb98b	404	static int des3_192_setkey(struct crypto_tfm tfm, const u8 key,
560c06ae	405	unsigned int keylen)
1da177e4 LT	406	{
1da177e4 LT	407	int i, ret;
6c2bb98b	408	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
560c06ae HX	409	const u8 *temp_key = key;
560c06ae HX	410	u32 *flags = &tfm->crt_flags;
1da177e4	411
1da177e4 LT	412	if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
1da177e4 LT	413	memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
c1357833	414	DES_KEY_SIZE))) {
1da177e4 LT	415
	416	*flags \|= CRYPTO_TFM_RES_BAD_KEY_SCHED;
	417	return -EINVAL;
	418	}
	419	for (i = 0; i < 3; i++, temp_key += DES_KEY_SIZE) {
	420	ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
c1357833	421	if (ret < 0)
1da177e4	422	return ret;
1da177e4 LT	423	}
	424	memcpy(dctx->key, key, keylen);
	425	return 0;
	426	}
	427
6c2bb98b	428	static void des3_192_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
1da177e4	429	{
6c2bb98b	430	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
1da177e4	431
c1e26e1e	432	crypt_s390_km(KM_TDEA_192_ENCRYPT, dctx->key, dst, (void*)src,
c1357833	433	DES3_192_BLOCK_SIZE);
1da177e4 LT	434	}
1da177e4 LT	435
6c2bb98b	436	static void des3_192_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
1da177e4	437	{
6c2bb98b	438	struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
1da177e4	439
c1e26e1e	440	crypt_s390_km(KM_TDEA_192_DECRYPT, dctx->key, dst, (void*)src,
c1357833	441	DES3_192_BLOCK_SIZE);
1da177e4 LT	442	}
	443
	444	static struct crypto_alg des3_192_alg = {
	445	.cra_name = "des3_ede",
65b75c36 HX	446	.cra_driver_name = "des3_ede-s390",
65b75c36 HX	447	.cra_priority = CRYPT_S390_PRIORITY,
1da177e4 LT	448	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
1da177e4 LT	449	.cra_blocksize = DES3_192_BLOCK_SIZE,
c1e26e1e	450	.cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
1da177e4 LT	451	.cra_module = THIS_MODULE,
1da177e4 LT	452	.cra_list = LIST_HEAD_INIT(des3_192_alg.cra_list),
c1357833 JG	453	.cra_u = {
	454	.cipher = {
	455	.cia_min_keysize = DES3_192_KEY_SIZE,
	456	.cia_max_keysize = DES3_192_KEY_SIZE,
	457	.cia_setkey = des3_192_setkey,
	458	.cia_encrypt = des3_192_encrypt,
b8dc6038	459	.cia_decrypt = des3_192_decrypt,
c1357833 JG	460	}
c1357833 JG	461	}
1da177e4 LT	462	};
1da177e4 LT	463
a9e62fad HX	464	static int ecb_des3_192_encrypt(struct blkcipher_desc *desc,
	465	struct scatterlist *dst,
	466	struct scatterlist *src, unsigned int nbytes)
	467	{
	468	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	469	struct blkcipher_walk walk;
	470
	471	blkcipher_walk_init(&walk, dst, src, nbytes);
	472	return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, sctx->key, &walk);
	473	}
	474
	475	static int ecb_des3_192_decrypt(struct blkcipher_desc *desc,
	476	struct scatterlist *dst,
	477	struct scatterlist *src, unsigned int nbytes)
	478	{
	479	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	480	struct blkcipher_walk walk;
	481
	482	blkcipher_walk_init(&walk, dst, src, nbytes);
	483	return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, sctx->key, &walk);
	484	}
	485
	486	static struct crypto_alg ecb_des3_192_alg = {
	487	.cra_name = "ecb(des3_ede)",
	488	.cra_driver_name = "ecb-des3_ede-s390",
	489	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
	490	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
	491	.cra_blocksize = DES3_192_BLOCK_SIZE,
	492	.cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
	493	.cra_type = &crypto_blkcipher_type,
	494	.cra_module = THIS_MODULE,
	495	.cra_list = LIST_HEAD_INIT(
	496	ecb_des3_192_alg.cra_list),
	497	.cra_u = {
	498	.blkcipher = {
	499	.min_keysize = DES3_192_KEY_SIZE,
	500	.max_keysize = DES3_192_KEY_SIZE,
	501	.setkey = des3_192_setkey,
	502	.encrypt = ecb_des3_192_encrypt,
	503	.decrypt = ecb_des3_192_decrypt,
	504	}
	505	}
	506	};
	507
	508	static int cbc_des3_192_encrypt(struct blkcipher_desc *desc,
	509	struct scatterlist *dst,
	510	struct scatterlist *src, unsigned int nbytes)
	511	{
	512	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	513	struct blkcipher_walk walk;
	514
	515	blkcipher_walk_init(&walk, dst, src, nbytes);
	516	return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, sctx->iv, &walk);
	517	}
	518
	519	static int cbc_des3_192_decrypt(struct blkcipher_desc *desc,
	520	struct scatterlist *dst,
	521	struct scatterlist *src, unsigned int nbytes)
	522	{
	523	struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
	524	struct blkcipher_walk walk;
	525
	526	blkcipher_walk_init(&walk, dst, src, nbytes);
	527	return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, sctx->iv, &walk);
528	}
529
530	static struct crypto_alg cbc_des3_192_alg = {
531	.cra_name = "cbc(des3_ede)",
532	.cra_driver_name = "cbc-des3_ede-s390",
533	.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
534	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
535	.cra_blocksize = DES3_192_BLOCK_SIZE,
536	.cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
537	.cra_type = &crypto_blkcipher_type,
538	.cra_module = THIS_MODULE,
539	.cra_list = LIST_HEAD_INIT(
540	cbc_des3_192_alg.cra_list),
541	.cra_u = {
542	.blkcipher = {
543	.min_keysize = DES3_192_KEY_SIZE,
544	.max_keysize = DES3_192_KEY_SIZE,
545	.ivsize = DES3_192_BLOCK_SIZE,
546	.setkey = des3_192_setkey,
547	.encrypt = cbc_des3_192_encrypt,
548	.decrypt = cbc_des3_192_decrypt,
549	}
550	}
551	};
552
c1357833	553	static int init(void)
1da177e4	554	{
c1357833	555	int ret = 0;
1da177e4	556
c1e26e1e JG	557	if (!crypt_s390_func_available(KM_DEA_ENCRYPT) \|\|
c1e26e1e JG	558	!crypt_s390_func_available(KM_TDEA_128_ENCRYPT) \|\|
c1357833	559	!crypt_s390_func_available(KM_TDEA_192_ENCRYPT))
1da177e4	560	return -ENOSYS;
1da177e4	561
a9e62fad HX	562	ret = crypto_register_alg(&des_alg);
	563	if (ret)
	564	goto des_err;
	565	ret = crypto_register_alg(&ecb_des_alg);
	566	if (ret)
	567	goto ecb_des_err;
	568	ret = crypto_register_alg(&cbc_des_alg);
	569	if (ret)
	570	goto cbc_des_err;
	571
	572	ret = crypto_register_alg(&des3_128_alg);
	573	if (ret)
	574	goto des3_128_err;
	575	ret = crypto_register_alg(&ecb_des3_128_alg);
	576	if (ret)
	577	goto ecb_des3_128_err;
	578	ret = crypto_register_alg(&cbc_des3_128_alg);
	579	if (ret)
	580	goto cbc_des3_128_err;
	581
	582	ret = crypto_register_alg(&des3_192_alg);
	583	if (ret)
	584	goto des3_192_err;
	585	ret = crypto_register_alg(&ecb_des3_192_alg);
	586	if (ret)
	587	goto ecb_des3_192_err;
	588	ret = crypto_register_alg(&cbc_des3_192_alg);
	589	if (ret)
	590	goto cbc_des3_192_err;
	591
	592	out:
	593	return ret;
	594
	595	cbc_des3_192_err:
	596	crypto_unregister_alg(&ecb_des3_192_alg);
	597	ecb_des3_192_err:
	598	crypto_unregister_alg(&des3_192_alg);
	599	des3_192_err:
	600	crypto_unregister_alg(&cbc_des3_128_alg);
	601	cbc_des3_128_err:
	602	crypto_unregister_alg(&ecb_des3_128_alg);
	603	ecb_des3_128_err:
	604	crypto_unregister_alg(&des3_128_alg);
	605	des3_128_err:
	606	crypto_unregister_alg(&cbc_des_alg);
	607	cbc_des_err:
	608	crypto_unregister_alg(&ecb_des_alg);
	609	ecb_des_err:
	610	crypto_unregister_alg(&des_alg);
	611	des_err:
	612	goto out;
1da177e4 LT	613	}
1da177e4 LT	614
c1357833	615	static void __exit fini(void)
1da177e4	616	{
a9e62fad HX	617	crypto_unregister_alg(&cbc_des3_192_alg);
a9e62fad HX	618	crypto_unregister_alg(&ecb_des3_192_alg);
1da177e4	619	crypto_unregister_alg(&des3_192_alg);
a9e62fad HX	620	crypto_unregister_alg(&cbc_des3_128_alg);
a9e62fad HX	621	crypto_unregister_alg(&ecb_des3_128_alg);
1da177e4	622	crypto_unregister_alg(&des3_128_alg);
a9e62fad HX	623	crypto_unregister_alg(&cbc_des_alg);
a9e62fad HX	624	crypto_unregister_alg(&ecb_des_alg);
1da177e4 LT	625	crypto_unregister_alg(&des_alg);
	626	}
	627
	628	module_init(init);
	629	module_exit(fini);
	630
	631	MODULE_ALIAS("des");
	632	MODULE_ALIAS("des3_ede");
	633
	634	MODULE_LICENSE("GPL");
	635	MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");