1/*
2 * Cryptographic API.
3 *
4 * s390 implementation of the SHA1 Secure Hash Algorithm.
5 *
6 * Derived from cryptoapi implementation, adapted for in-place
7 * scatterlist interface.  Originally based on the public domain
8 * implementation written by Steve Reid.
9 *
10 * s390 Version:
11 *   Copyright IBM Corp. 2003, 2007
12 *   Author(s): Thomas Spatzier
13 *		Jan Glauber (jan.glauber@de.ibm.com)
14 *
15 * Derived from "crypto/sha1_generic.c"
16 *   Copyright (c) Alan Smithee.
17 *   Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
18 *   Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
19 *
20 * This program is free software; you can redistribute it and/or modify it
21 * under the terms of the GNU General Public License as published by the Free
22 * Software Foundation; either version 2 of the License, or (at your option)
23 * any later version.
24 *
25 */
26#include <crypto/internal/hash.h>
27#include <linux/init.h>
28#include <linux/module.h>
29#include <linux/cpufeature.h>
30#include <crypto/sha.h>
31
32#include "crypt_s390.h"
33#include "sha.h"
34
35static int sha1_init(struct shash_desc *desc)
36{
37	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
38
39	sctx->state[0] = SHA1_H0;
40	sctx->state[1] = SHA1_H1;
41	sctx->state[2] = SHA1_H2;
42	sctx->state[3] = SHA1_H3;
43	sctx->state[4] = SHA1_H4;
44	sctx->count = 0;
45	sctx->func = KIMD_SHA_1;
46
47	return 0;
48}
49
50static int sha1_export(struct shash_desc *desc, void *out)
51{
52	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
53	struct sha1_state *octx = out;
54
55	octx->count = sctx->count;
56	memcpy(octx->state, sctx->state, sizeof(octx->state));
57	memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer));
58	return 0;
59}
60
61static int sha1_import(struct shash_desc *desc, const void *in)
62{
63	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
64	const struct sha1_state *ictx = in;
65
66	sctx->count = ictx->count;
67	memcpy(sctx->state, ictx->state, sizeof(ictx->state));
68	memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer));
69	sctx->func = KIMD_SHA_1;
70	return 0;
71}
72
73static struct shash_alg alg = {
74	.digestsize	=	SHA1_DIGEST_SIZE,
75	.init		=	sha1_init,
76	.update		=	s390_sha_update,
77	.final		=	s390_sha_final,
78	.export		=	sha1_export,
79	.import		=	sha1_import,
80	.descsize	=	sizeof(struct s390_sha_ctx),
81	.statesize	=	sizeof(struct sha1_state),
82	.base		=	{
83		.cra_name	=	"sha1",
84		.cra_driver_name=	"sha1-s390",
85		.cra_priority	=	CRYPT_S390_PRIORITY,
86		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
87		.cra_blocksize	=	SHA1_BLOCK_SIZE,
88		.cra_module	=	THIS_MODULE,
89	}
90};
91
92static int __init sha1_s390_init(void)
93{
94	if (!crypt_s390_func_available(KIMD_SHA_1, CRYPT_S390_MSA))
95		return -EOPNOTSUPP;
96	return crypto_register_shash(&alg);
97}
98
99static void __exit sha1_s390_fini(void)
100{
101	crypto_unregister_shash(&alg);
102}
103
104module_cpu_feature_match(MSA, sha1_s390_init);
105module_exit(sha1_s390_fini);
106
107MODULE_ALIAS_CRYPTO("sha1");
108MODULE_LICENSE("GPL");
109MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
110