b4b3438ae77edcabc059ee5faac706cf50d03e6a
[linux-2.6.git] / arch / s390 / crypto / sha512_s390.c
1 /*
2  * Cryptographic API.
3  *
4  * s390 implementation of the SHA512 and SHA38 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 <crypto/internal/hash.h>
16 #include <crypto/sha.h>
17 #include <linux/errno.h>
18 #include <linux/init.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21
22 #include "sha.h"
23 #include "crypt_s390.h"
24
25 static int sha512_init(struct shash_desc *desc)
26 {
27         struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
28
29         *(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
30         *(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
31         *(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
32         *(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
33         *(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
34         *(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
35         *(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
36         *(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
37         ctx->count = 0;
38         ctx->func = KIMD_SHA_512;
39
40         return 0;
41 }
42
43 static int sha512_export(struct shash_desc *desc, void *out)
44 {
45         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
46         struct sha512_state *octx = out;
47
48         octx->count[0] = sctx->count;
49         octx->count[1] = 0;
50         memcpy(octx->state, sctx->state, sizeof(octx->state));
51         memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
52         return 0;
53 }
54
55 static int sha512_import(struct shash_desc *desc, const u8 *in)
56 {
57         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
58         struct sha512_state *ictx = in;
59
60         if (unlikely(ictx->count[1]))
61                 return -ERANGE;
62         sctx->count = ictx->count[0];
63
64         memcpy(sctx->state, ictx->state, sizeof(ictx->state));
65         memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
66         sctx->func = KIMD_SHA_512;
67         return 0;
68 }
69
70 static struct shash_alg sha512_alg = {
71         .digestsize     =       SHA512_DIGEST_SIZE,
72         .init           =       sha512_init,
73         .update         =       s390_sha_update,
74         .final          =       s390_sha_final,
75         .export         =       sha512_export,
76         .import         =       sha512_import,
77         .descsize       =       sizeof(struct s390_sha_ctx),
78         .statesize      =       sizeof(struct sha512_state),
79         .base           =       {
80                 .cra_name       =       "sha512",
81                 .cra_driver_name=       "sha512-s390",
82                 .cra_priority   =       CRYPT_S390_PRIORITY,
83                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
84                 .cra_blocksize  =       SHA512_BLOCK_SIZE,
85                 .cra_module     =       THIS_MODULE,
86         }
87 };
88
89 MODULE_ALIAS("sha512");
90
91 static int sha384_init(struct shash_desc *desc)
92 {
93         struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
94
95         *(__u64 *)&ctx->state[0] = 0xcbbb9d5dc1059ed8ULL;
96         *(__u64 *)&ctx->state[2] = 0x629a292a367cd507ULL;
97         *(__u64 *)&ctx->state[4] = 0x9159015a3070dd17ULL;
98         *(__u64 *)&ctx->state[6] = 0x152fecd8f70e5939ULL;
99         *(__u64 *)&ctx->state[8] = 0x67332667ffc00b31ULL;
100         *(__u64 *)&ctx->state[10] = 0x8eb44a8768581511ULL;
101         *(__u64 *)&ctx->state[12] = 0xdb0c2e0d64f98fa7ULL;
102         *(__u64 *)&ctx->state[14] = 0x47b5481dbefa4fa4ULL;
103         ctx->count = 0;
104         ctx->func = KIMD_SHA_512;
105
106         return 0;
107 }
108
109 static struct shash_alg sha384_alg = {
110         .digestsize     =       SHA384_DIGEST_SIZE,
111         .init           =       sha384_init,
112         .update         =       s390_sha_update,
113         .final          =       s390_sha_final,
114         .export         =       sha512_export,
115         .import         =       sha512_import,
116         .descsize       =       sizeof(struct s390_sha_ctx),
117         .statesize      =       sizeof(struct sha512_state),
118         .base           =       {
119                 .cra_name       =       "sha384",
120                 .cra_driver_name=       "sha384-s390",
121                 .cra_priority   =       CRYPT_S390_PRIORITY,
122                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
123                 .cra_blocksize  =       SHA384_BLOCK_SIZE,
124                 .cra_ctxsize    =       sizeof(struct s390_sha_ctx),
125                 .cra_module     =       THIS_MODULE,
126         }
127 };
128
129 MODULE_ALIAS("sha384");
130
131 static int __init init(void)
132 {
133         int ret;
134
135         if (!crypt_s390_func_available(KIMD_SHA_512))
136                 return -EOPNOTSUPP;
137         if ((ret = crypto_register_shash(&sha512_alg)) < 0)
138                 goto out;
139         if ((ret = crypto_register_shash(&sha384_alg)) < 0)
140                 crypto_unregister_shash(&sha512_alg);
141 out:
142         return ret;
143 }
144
145 static void __exit fini(void)
146 {
147         crypto_unregister_shash(&sha512_alg);
148         crypto_unregister_shash(&sha384_alg);
149 }
150
151 module_init(init);
152 module_exit(fini);
153
154 MODULE_LICENSE("GPL");
155 MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");