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
sha1_init(struct shash_desc * desc)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
sha1_export(struct shash_desc * desc,void * out)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
sha1_import(struct shash_desc * desc,const void * in)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
sha1_s390_init(void)91 static 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
sha1_s390_fini(void)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");
109