[linux-2.6-block.git] / arch / s390 / crypto / sha256_s390.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Cryptographic API.
 *
 * s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
 *
 * s390 Version:
 *   Copyright IBM Corp. 2005, 2011
 *   Author(s): Jan Glauber (jang@de.ibm.com)
 */
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/cpufeature.h>
#include <crypto/sha.h>
#include <asm/cpacf.h>

#include "sha.h"

static int s390_sha256_init(struct shash_desc *desc)
{
	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA256_H0;
	sctx->state[1] = SHA256_H1;
	sctx->state[2] = SHA256_H2;
	sctx->state[3] = SHA256_H3;
	sctx->state[4] = SHA256_H4;
	sctx->state[5] = SHA256_H5;
	sctx->state[6] = SHA256_H6;
	sctx->state[7] = SHA256_H7;
	sctx->count = 0;
	sctx->func = CPACF_KIMD_SHA_256;

	return 0;
}

static int sha256_export(struct shash_desc *desc, void *out)
{
	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
	struct sha256_state *octx = out;

	octx->count = sctx->count;
	memcpy(octx->state, sctx->state, sizeof(octx->state));
	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
	return 0;
}

static int sha256_import(struct shash_desc *desc, const void *in)
{
	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
	const struct sha256_state *ictx = in;

	sctx->count = ictx->count;
	memcpy(sctx->state, ictx->state, sizeof(ictx->state));
	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
	sctx->func = CPACF_KIMD_SHA_256;
	return 0;
}

static struct shash_alg sha256_alg = {
	.digestsize	=	SHA256_DIGEST_SIZE,
	.init		=	s390_sha256_init,
	.update		=	s390_sha_update,
	.final		=	s390_sha_final,
	.export		=	sha256_export,
	.import		=	sha256_import,
	.descsize	=	sizeof(struct s390_sha_ctx),
	.statesize	=	sizeof(struct sha256_state),
	.base		=	{
		.cra_name	=	"sha256",
		.cra_driver_name=	"sha256-s390",
		.cra_priority	=	300,
		.cra_blocksize	=	SHA256_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
};

static int s390_sha224_init(struct shash_desc *desc)
{
	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA224_H0;
	sctx->state[1] = SHA224_H1;
	sctx->state[2] = SHA224_H2;
	sctx->state[3] = SHA224_H3;
	sctx->state[4] = SHA224_H4;
	sctx->state[5] = SHA224_H5;
	sctx->state[6] = SHA224_H6;
	sctx->state[7] = SHA224_H7;
	sctx->count = 0;
	sctx->func = CPACF_KIMD_SHA_256;

	return 0;
}

static struct shash_alg sha224_alg = {
	.digestsize	=	SHA224_DIGEST_SIZE,
	.init		=	s390_sha224_init,
	.update		=	s390_sha_update,
	.final		=	s390_sha_final,
	.export		=	sha256_export,
	.import		=	sha256_import,
	.descsize	=	sizeof(struct s390_sha_ctx),
	.statesize	=	sizeof(struct sha256_state),
	.base		=	{
		.cra_name	=	"sha224",
		.cra_driver_name=	"sha224-s390",
		.cra_priority	=	300,
		.cra_blocksize	=	SHA224_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
};

static int __init sha256_s390_init(void)
{
	int ret;

	if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_256))
		return -ENODEV;
	ret = crypto_register_shash(&sha256_alg);
	if (ret < 0)
		goto out;
	ret = crypto_register_shash(&sha224_alg);
	if (ret < 0)
		crypto_unregister_shash(&sha256_alg);
out:
	return ret;
}

static void __exit sha256_s390_fini(void)
{
	crypto_unregister_shash(&sha224_alg);
	crypto_unregister_shash(&sha256_alg);
}

module_cpu_feature_match(MSA, sha256_s390_init);
module_exit(sha256_s390_fini);

MODULE_ALIAS_CRYPTO("sha256");
MODULE_ALIAS_CRYPTO("sha224");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA256 and SHA224 Secure Hash Algorithm");
Commit	Line	Data
20a884f5	1	// SPDX-License-Identifier: GPL-2.0+
0a497c17 JG	2	/*
	3	* Cryptographic API.
	4	*
e3b4f515	5	* s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
0a497c17 JG	6	*
0a497c17 JG	7	* s390 Version:
a53c8fab	8	* Copyright IBM Corp. 2005, 2011
0a497c17	9	* Author(s): Jan Glauber (jang@de.ibm.com)
0a497c17	10	*/
563f346d	11	#include <crypto/internal/hash.h>
0a497c17 JG	12	#include <linux/init.h>
0a497c17 JG	13	#include <linux/module.h>
d05377c1	14	#include <linux/cpufeature.h>
5265eeb2	15	#include <crypto/sha.h>
c7d4d259	16	#include <asm/cpacf.h>
0a497c17	17
604973f1	18	#include "sha.h"
0a497c17	19
b86fc489	20	static int s390_sha256_init(struct shash_desc *desc)
0a497c17	21	{
563f346d	22	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
0a497c17	23
5265eeb2 JG	24	sctx->state[0] = SHA256_H0;
	25	sctx->state[1] = SHA256_H1;
	26	sctx->state[2] = SHA256_H2;
	27	sctx->state[3] = SHA256_H3;
	28	sctx->state[4] = SHA256_H4;
	29	sctx->state[5] = SHA256_H5;
	30	sctx->state[6] = SHA256_H6;
	31	sctx->state[7] = SHA256_H7;
0a497c17	32	sctx->count = 0;
c7d4d259	33	sctx->func = CPACF_KIMD_SHA_256;
563f346d HX	34
563f346d HX	35	return 0;
0a497c17 JG	36	}
0a497c17 JG	37
f63559be HX	38	static int sha256_export(struct shash_desc desc, void out)
	39	{
	40	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
	41	struct sha256_state *octx = out;
	42
	43	octx->count = sctx->count;
	44	memcpy(octx->state, sctx->state, sizeof(octx->state));
	45	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
	46	return 0;
	47	}
	48
81bd5f6c	49	static int sha256_import(struct shash_desc desc, const void in)
f63559be	50	{
2a549c36	51	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
81bd5f6c	52	const struct sha256_state *ictx = in;
f63559be HX	53
	54	sctx->count = ictx->count;
	55	memcpy(sctx->state, ictx->state, sizeof(ictx->state));
	56	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
c7d4d259	57	sctx->func = CPACF_KIMD_SHA_256;
f63559be HX	58	return 0;
	59	}
	60
e3b4f515	61	static struct shash_alg sha256_alg = {
563f346d	62	.digestsize = SHA256_DIGEST_SIZE,
b86fc489	63	.init = s390_sha256_init,
563f346d HX	64	.update = s390_sha_update,
563f346d HX	65	.final = s390_sha_final,
f63559be HX	66	.export = sha256_export,
f63559be HX	67	.import = sha256_import,
563f346d	68	.descsize = sizeof(struct s390_sha_ctx),
f63559be	69	.statesize = sizeof(struct sha256_state),
563f346d HX	70	.base = {
	71	.cra_name = "sha256",
	72	.cra_driver_name= "sha256-s390",
c7d4d259	73	.cra_priority = 300,
563f346d HX	74	.cra_blocksize = SHA256_BLOCK_SIZE,
	75	.cra_module = THIS_MODULE,
	76	}
0a497c17 JG	77	};
0a497c17 JG	78
b86fc489	79	static int s390_sha224_init(struct shash_desc *desc)
0a497c17	80	{
e3b4f515 JG	81	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
	82
	83	sctx->state[0] = SHA224_H0;
	84	sctx->state[1] = SHA224_H1;
	85	sctx->state[2] = SHA224_H2;
	86	sctx->state[3] = SHA224_H3;
	87	sctx->state[4] = SHA224_H4;
	88	sctx->state[5] = SHA224_H5;
	89	sctx->state[6] = SHA224_H6;
	90	sctx->state[7] = SHA224_H7;
	91	sctx->count = 0;
c7d4d259	92	sctx->func = CPACF_KIMD_SHA_256;
e3b4f515 JG	93
	94	return 0;
	95	}
	96
	97	static struct shash_alg sha224_alg = {
	98	.digestsize = SHA224_DIGEST_SIZE,
b86fc489	99	.init = s390_sha224_init,
e3b4f515 JG	100	.update = s390_sha_update,
	101	.final = s390_sha_final,
	102	.export = sha256_export,
	103	.import = sha256_import,
	104	.descsize = sizeof(struct s390_sha_ctx),
	105	.statesize = sizeof(struct sha256_state),
	106	.base = {
	107	.cra_name = "sha224",
	108	.cra_driver_name= "sha224-s390",
c7d4d259	109	.cra_priority = 300,
e3b4f515 JG	110	.cra_blocksize = SHA224_BLOCK_SIZE,
	111	.cra_module = THIS_MODULE,
	112	}
	113	};
	114
	115	static int __init sha256_s390_init(void)
	116	{
	117	int ret;
	118
69c0e360	119	if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_256))
45488c48	120	return -ENODEV;
e3b4f515 JG	121	ret = crypto_register_shash(&sha256_alg);
	122	if (ret < 0)
	123	goto out;
	124	ret = crypto_register_shash(&sha224_alg);
	125	if (ret < 0)
	126	crypto_unregister_shash(&sha256_alg);
	127	out:
	128	return ret;
0a497c17 JG	129	}
0a497c17 JG	130
9f7819c1	131	static void __exit sha256_s390_fini(void)
0a497c17	132	{
e3b4f515 JG	133	crypto_unregister_shash(&sha224_alg);
e3b4f515 JG	134	crypto_unregister_shash(&sha256_alg);
0a497c17 JG	135	}
0a497c17 JG	136
d05377c1	137	module_cpu_feature_match(MSA, sha256_s390_init);
9f7819c1	138	module_exit(sha256_s390_fini);
0a497c17	139
5d26a105 KC	140	MODULE_ALIAS_CRYPTO("sha256");
5d26a105 KC	141	MODULE_ALIAS_CRYPTO("sha224");
0a497c17	142	MODULE_LICENSE("GPL");
e3b4f515	143	MODULE_DESCRIPTION("SHA256 and SHA224 Secure Hash Algorithm");