/arch/s390/crypto/sha512_s390.c

  1/*
  2 * Cryptographic API.
  3 *
  4 * s390 implementation of the SHA512 and SHA38 Secure Hash Algorithm.
  5 *
  6 * Copyright IBM Corp. 2007
  7 * Author(s): Jan Glauber (jang@de.ibm.com)
  8 *
  9 * This program is free software; you can redistribute it and/or modify it
 10 * under the terms of the GNU General Public License as published by the Free
 11 * Software Foundation; either version 2 of the License, or (at your option)
 12 * any later version.
 13 *
 14 */
 15#include <crypto/internal/hash.h>
 16#include <crypto/sha.h>
 17#include <linux/errno.h>
 18#include <linux/init.h>
 19#include <linux/kernel.h>
 20#include <linux/module.h>
 21
 22#include "sha.h"
 23#include "crypt_s390.h"
 24
 25static int sha512_init(struct shash_desc *desc)
 26{
 27	struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
 28
 29	*(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
 30	*(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
 31	*(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
 32	*(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
 33	*(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
 34	*(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
 35	*(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
 36	*(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
 37	ctx->count = 0;
 38	ctx->func = KIMD_SHA_512;
 39
 40	return 0;
 41}
 42
 43static int sha512_export(struct shash_desc *desc, void *out)
 44{
 45	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 46	struct sha512_state *octx = out;
 47
 48	octx->count[0] = sctx->count;
 49	octx->count[1] = 0;
 50	memcpy(octx->state, sctx->state, sizeof(octx->state));
 51	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
 52	return 0;
 53}
 54
 55static int sha512_import(struct shash_desc *desc, const void *in)
 56{
 57	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 58	const struct sha512_state *ictx = in;
 59
 60	if (unlikely(ictx->count[1]))
 61		return -ERANGE;
 62	sctx->count = ictx->count[0];
 63
 64	memcpy(sctx->state, ictx->state, sizeof(ictx->state));
 65	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
 66	sctx->func = KIMD_SHA_512;
 67	return 0;
 68}
 69
 70static struct shash_alg sha512_alg = {
 71	.digestsize	=	SHA512_DIGEST_SIZE,
 72	.init		=	sha512_init,
 73	.update		=	s390_sha_update,
 74	.final		=	s390_sha_final,
 75	.export		=	sha512_export,
 76	.import		=	sha512_import,
 77	.descsize	=	sizeof(struct s390_sha_ctx),
 78	.statesize	=	sizeof(struct sha512_state),
 79	.base		=	{
 80		.cra_name	=	"sha512",
 81		.cra_driver_name=	"sha512-s390",
 82		.cra_priority	=	CRYPT_S390_PRIORITY,
 83		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
 84		.cra_blocksize	=	SHA512_BLOCK_SIZE,
 85		.cra_module	=	THIS_MODULE,
 86	}
 87};
 88
 89MODULE_ALIAS("sha512");
 90
 91static int sha384_init(struct shash_desc *desc)
 92{
 93	struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
 94
 95	*(__u64 *)&ctx->state[0] = 0xcbbb9d5dc1059ed8ULL;
 96	*(__u64 *)&ctx->state[2] = 0x629a292a367cd507ULL;
 97	*(__u64 *)&ctx->state[4] = 0x9159015a3070dd17ULL;
 98	*(__u64 *)&ctx->state[6] = 0x152fecd8f70e5939ULL;
 99	*(__u64 *)&ctx->state[8] = 0x67332667ffc00b31ULL;
100	*(__u64 *)&ctx->state[10] = 0x8eb44a8768581511ULL;
101	*(__u64 *)&ctx->state[12] = 0xdb0c2e0d64f98fa7ULL;
102	*(__u64 *)&ctx->state[14] = 0x47b5481dbefa4fa4ULL;
103	ctx->count = 0;
104	ctx->func = KIMD_SHA_512;
105
106	return 0;
107}
108
109static struct shash_alg sha384_alg = {
110	.digestsize	=	SHA384_DIGEST_SIZE,
111	.init		=	sha384_init,
112	.update		=	s390_sha_update,
113	.final		=	s390_sha_final,
114	.export		=	sha512_export,
115	.import		=	sha512_import,
116	.descsize	=	sizeof(struct s390_sha_ctx),
117	.statesize	=	sizeof(struct sha512_state),
118	.base		=	{
119		.cra_name	=	"sha384",
120		.cra_driver_name=	"sha384-s390",
121		.cra_priority	=	CRYPT_S390_PRIORITY,
122		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
123		.cra_blocksize	=	SHA384_BLOCK_SIZE,
124		.cra_ctxsize	=	sizeof(struct s390_sha_ctx),
125		.cra_module	=	THIS_MODULE,
126	}
127};
128
129MODULE_ALIAS("sha384");
130
131static int __init init(void)
132{
133	int ret;
134
135	if (!crypt_s390_func_available(KIMD_SHA_512))
136		return -EOPNOTSUPP;
137	if ((ret = crypto_register_shash(&sha512_alg)) < 0)
138		goto out;
139	if ((ret = crypto_register_shash(&sha384_alg)) < 0)
140		crypto_unregister_shash(&sha512_alg);
141out:
142	return ret;
143}
144
145static void __exit fini(void)
146{
147	crypto_unregister_shash(&sha512_alg);
148	crypto_unregister_shash(&sha384_alg);
149}
150
151module_init(init);
152module_exit(fini);
153
154MODULE_LICENSE("GPL");
155MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");