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[cris-mirror.git] / arch / s390 / crypto / sha256_s390.c
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1 /*
2 * Cryptographic API.
4 * s390 implementation of the SHA256 Secure Hash Algorithm.
6 * s390 Version:
7 * Copyright IBM Corp. 2005,2007
8 * Author(s): Jan Glauber (jang@de.ibm.com)
10 * Derived from "crypto/sha256_generic.c"
11 * and "arch/s390/crypto/sha1_s390.c"
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 2 of the License, or (at your option)
16 * any later version.
19 #include <linux/init.h>
20 #include <linux/module.h>
21 #include <linux/crypto.h>
22 #include <crypto/sha.h>
24 #include "crypt_s390.h"
25 #include "sha.h"
27 static void sha256_init(struct crypto_tfm *tfm)
29 struct s390_sha_ctx *sctx = crypto_tfm_ctx(tfm);
31 sctx->state[0] = SHA256_H0;
32 sctx->state[1] = SHA256_H1;
33 sctx->state[2] = SHA256_H2;
34 sctx->state[3] = SHA256_H3;
35 sctx->state[4] = SHA256_H4;
36 sctx->state[5] = SHA256_H5;
37 sctx->state[6] = SHA256_H6;
38 sctx->state[7] = SHA256_H7;
39 sctx->count = 0;
40 sctx->func = KIMD_SHA_256;
43 static struct crypto_alg alg = {
44 .cra_name = "sha256",
45 .cra_driver_name = "sha256-s390",
46 .cra_priority = CRYPT_S390_PRIORITY,
47 .cra_flags = CRYPTO_ALG_TYPE_DIGEST,
48 .cra_blocksize = SHA256_BLOCK_SIZE,
49 .cra_ctxsize = sizeof(struct s390_sha_ctx),
50 .cra_module = THIS_MODULE,
51 .cra_list = LIST_HEAD_INIT(alg.cra_list),
52 .cra_u = { .digest = {
53 .dia_digestsize = SHA256_DIGEST_SIZE,
54 .dia_init = sha256_init,
55 .dia_update = s390_sha_update,
56 .dia_final = s390_sha_final } }
59 static int sha256_s390_init(void)
61 if (!crypt_s390_func_available(KIMD_SHA_256))
62 return -EOPNOTSUPP;
64 return crypto_register_alg(&alg);
67 static void __exit sha256_s390_fini(void)
69 crypto_unregister_alg(&alg);
72 module_init(sha256_s390_init);
73 module_exit(sha256_s390_fini);
75 MODULE_ALIAS("sha256");
76 MODULE_LICENSE("GPL");
77 MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm");