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 <crypto/sha.h>
30
31#include "crypt_s390.h"
32#include "sha.h"
33
34static int sha1_init(struct shash_desc *desc)
35{
36	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
37
38	sctx->state[0] = SHA1_H0;
39	sctx->state[1] = SHA1_H1;
40	sctx->state[2] = SHA1_H2;
41	sctx->state[3] = SHA1_H3;
42	sctx->state[4] = SHA1_H4;
43	sctx->count = 0;
44	sctx->func = KIMD_SHA_1;
45
46	return 0;
47}
48
49static int sha1_export(struct shash_desc *desc, void *out)
50{
51	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
52	struct sha1_state *octx = out;
53
54	octx->count = sctx->count;
55	memcpy(octx->state, sctx->state, sizeof(octx->state));
56	memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer));
57	return 0;
58}
59
60static int sha1_import(struct shash_desc *desc, const void *in)
61{
62	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
63	const struct sha1_state *ictx = in;
64
65	sctx->count = ictx->count;
66	memcpy(sctx->state, ictx->state, sizeof(ictx->state));
67	memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer));
68	sctx->func = KIMD_SHA_1;
69	return 0;
70}
71
72static struct shash_alg alg = {
73	.digestsize	=	SHA1_DIGEST_SIZE,
74	.init		=	sha1_init,
75	.update		=	s390_sha_update,
76	.final		=	s390_sha_final,
77	.export		=	sha1_export,
78	.import		=	sha1_import,
79	.descsize	=	sizeof(struct s390_sha_ctx),
80	.statesize	=	sizeof(struct sha1_state),
81	.base		=	{
82		.cra_name	=	"sha1",
83		.cra_driver_name=	"sha1-s390",
84		.cra_priority	=	CRYPT_S390_PRIORITY,
85		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
86		.cra_blocksize	=	SHA1_BLOCK_SIZE,
87		.cra_module	=	THIS_MODULE,
88	}
89};
90
91static int __init sha1_s390_init(void)
92{
93	if (!crypt_s390_func_available(KIMD_SHA_1, CRYPT_S390_MSA))
94		return -EOPNOTSUPP;
95	return crypto_register_shash(&alg);
96}
97
98static void __exit sha1_s390_fini(void)
99{
100	crypto_unregister_shash(&alg);
101}
102
103module_init(sha1_s390_init);
104module_exit(sha1_s390_fini);
105
106MODULE_ALIAS_CRYPTO("sha1");
107MODULE_LICENSE("GPL");
108MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
109