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, CRYPT_S390_MSA))
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");
156