[CRYPTO] sha512: Hardware acceleration for s390
[linux-2.6.git] / arch / s390 / crypto / sha512_s390.c
1 /*
2  * Cryptographic API.
3  *
4  * s390 implementation of the SHA512 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 <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/crypto.h>
18
19 #include "sha.h"
20 #include "crypt_s390.h"
21
22 static void sha512_init(struct crypto_tfm *tfm)
23 {
24         struct s390_sha_ctx *ctx = crypto_tfm_ctx(tfm);
25
26         *(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
27         *(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
28         *(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
29         *(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
30         *(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
31         *(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
32         *(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
33         *(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
34         ctx->count = 0;
35         ctx->func = KIMD_SHA_512;
36 }
37
38 static struct crypto_alg alg = {
39         .cra_name       =       "sha512",
40         .cra_driver_name =      "sha512-s390",
41         .cra_priority   =       CRYPT_S390_PRIORITY,
42         .cra_flags      =       CRYPTO_ALG_TYPE_DIGEST,
43         .cra_blocksize  =       SHA512_BLOCK_SIZE,
44         .cra_ctxsize    =       sizeof(struct s390_sha_ctx),
45         .cra_module     =       THIS_MODULE,
46         .cra_list       =       LIST_HEAD_INIT(alg.cra_list),
47         .cra_u          =       { .digest = {
48         .dia_digestsize =       SHA512_DIGEST_SIZE,
49         .dia_init       =       sha512_init,
50         .dia_update     =       s390_sha_update,
51         .dia_final      =       s390_sha_final } }
52 };
53
54 static int __init init(void)
55 {
56         if (!crypt_s390_func_available(KIMD_SHA_512))
57                 return -EOPNOTSUPP;
58         return crypto_register_alg(&alg);
59 }
60
61 static void __exit fini(void)
62 {
63         crypto_unregister_alg(&alg);
64 }
65
66 module_init(init);
67 module_exit(fini);
68
69 MODULE_ALIAS("sha512");
70 MODULE_LICENSE("GPL");
71 MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm");