crypto: sha-s390 - Fix warnings in import function
[linux-2.6.git] / arch / s390 / crypto / sha1_s390.c
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
34 static 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
49 static 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
60 static 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
72 static 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
91 static int __init sha1_s390_init(void)
92 {
93         if (!crypt_s390_func_available(KIMD_SHA_1))
94                 return -EOPNOTSUPP;
95         return crypto_register_shash(&alg);
96 }
97
98 static void __exit sha1_s390_fini(void)
99 {
100         crypto_unregister_shash(&alg);
101 }
102
103 module_init(sha1_s390_init);
104 module_exit(sha1_s390_fini);
105
106 MODULE_ALIAS("sha1");
107 MODULE_LICENSE("GPL");
108 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");