m68k: Kill several external declarations in source files
[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 <linux/init.h>
27 #include <linux/module.h>
28 #include <linux/crypto.h>
29 #include <crypto/sha.h>
30
31 #include "crypt_s390.h"
32 #include "sha.h"
33
34 static void sha1_init(struct crypto_tfm *tfm)
35 {
36         struct s390_sha_ctx *sctx = crypto_tfm_ctx(tfm);
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
47 static struct crypto_alg alg = {
48         .cra_name       =       "sha1",
49         .cra_driver_name=       "sha1-s390",
50         .cra_priority   =       CRYPT_S390_PRIORITY,
51         .cra_flags      =       CRYPTO_ALG_TYPE_DIGEST,
52         .cra_blocksize  =       SHA1_BLOCK_SIZE,
53         .cra_ctxsize    =       sizeof(struct s390_sha_ctx),
54         .cra_module     =       THIS_MODULE,
55         .cra_list       =       LIST_HEAD_INIT(alg.cra_list),
56         .cra_u          =       { .digest = {
57         .dia_digestsize =       SHA1_DIGEST_SIZE,
58         .dia_init       =       sha1_init,
59         .dia_update     =       s390_sha_update,
60         .dia_final      =       s390_sha_final } }
61 };
62
63 static int __init sha1_s390_init(void)
64 {
65         if (!crypt_s390_func_available(KIMD_SHA_1))
66                 return -EOPNOTSUPP;
67         return crypto_register_alg(&alg);
68 }
69
70 static void __exit sha1_s390_fini(void)
71 {
72         crypto_unregister_alg(&alg);
73 }
74
75 module_init(sha1_s390_init);
76 module_exit(sha1_s390_fini);
77
78 MODULE_ALIAS("sha1");
79 MODULE_LICENSE("GPL");
80 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");