GNU Linux-libre 4.9.288-gnu1
[releases.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 #include <linux/cpufeature.h>
22 #include <asm/cpacf.h>
23
24 #include "sha.h"
25
26 static int sha512_init(struct shash_desc *desc)
27 {
28         struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
29
30         *(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
31         *(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
32         *(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
33         *(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
34         *(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
35         *(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
36         *(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
37         *(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
38         ctx->count = 0;
39         ctx->func = CPACF_KIMD_SHA_512;
40
41         return 0;
42 }
43
44 static int sha512_export(struct shash_desc *desc, void *out)
45 {
46         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
47         struct sha512_state *octx = out;
48
49         octx->count[0] = sctx->count;
50         octx->count[1] = 0;
51         memcpy(octx->state, sctx->state, sizeof(octx->state));
52         memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
53         return 0;
54 }
55
56 static int sha512_import(struct shash_desc *desc, const void *in)
57 {
58         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
59         const struct sha512_state *ictx = in;
60
61         if (unlikely(ictx->count[1]))
62                 return -ERANGE;
63         sctx->count = ictx->count[0];
64
65         memcpy(sctx->state, ictx->state, sizeof(ictx->state));
66         memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
67         sctx->func = CPACF_KIMD_SHA_512;
68         return 0;
69 }
70
71 static struct shash_alg sha512_alg = {
72         .digestsize     =       SHA512_DIGEST_SIZE,
73         .init           =       sha512_init,
74         .update         =       s390_sha_update,
75         .final          =       s390_sha_final,
76         .export         =       sha512_export,
77         .import         =       sha512_import,
78         .descsize       =       sizeof(struct s390_sha_ctx),
79         .statesize      =       sizeof(struct sha512_state),
80         .base           =       {
81                 .cra_name       =       "sha512",
82                 .cra_driver_name=       "sha512-s390",
83                 .cra_priority   =       300,
84                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
85                 .cra_blocksize  =       SHA512_BLOCK_SIZE,
86                 .cra_module     =       THIS_MODULE,
87         }
88 };
89
90 MODULE_ALIAS_CRYPTO("sha512");
91
92 static int sha384_init(struct shash_desc *desc)
93 {
94         struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
95
96         *(__u64 *)&ctx->state[0] = 0xcbbb9d5dc1059ed8ULL;
97         *(__u64 *)&ctx->state[2] = 0x629a292a367cd507ULL;
98         *(__u64 *)&ctx->state[4] = 0x9159015a3070dd17ULL;
99         *(__u64 *)&ctx->state[6] = 0x152fecd8f70e5939ULL;
100         *(__u64 *)&ctx->state[8] = 0x67332667ffc00b31ULL;
101         *(__u64 *)&ctx->state[10] = 0x8eb44a8768581511ULL;
102         *(__u64 *)&ctx->state[12] = 0xdb0c2e0d64f98fa7ULL;
103         *(__u64 *)&ctx->state[14] = 0x47b5481dbefa4fa4ULL;
104         ctx->count = 0;
105         ctx->func = CPACF_KIMD_SHA_512;
106
107         return 0;
108 }
109
110 static struct shash_alg sha384_alg = {
111         .digestsize     =       SHA384_DIGEST_SIZE,
112         .init           =       sha384_init,
113         .update         =       s390_sha_update,
114         .final          =       s390_sha_final,
115         .export         =       sha512_export,
116         .import         =       sha512_import,
117         .descsize       =       sizeof(struct s390_sha_ctx),
118         .statesize      =       sizeof(struct sha512_state),
119         .base           =       {
120                 .cra_name       =       "sha384",
121                 .cra_driver_name=       "sha384-s390",
122                 .cra_priority   =       300,
123                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
124                 .cra_blocksize  =       SHA384_BLOCK_SIZE,
125                 .cra_ctxsize    =       sizeof(struct s390_sha_ctx),
126                 .cra_module     =       THIS_MODULE,
127         }
128 };
129
130 MODULE_ALIAS_CRYPTO("sha384");
131
132 static int __init init(void)
133 {
134         int ret;
135
136         if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_512))
137                 return -EOPNOTSUPP;
138         if ((ret = crypto_register_shash(&sha512_alg)) < 0)
139                 goto out;
140         if ((ret = crypto_register_shash(&sha384_alg)) < 0)
141                 crypto_unregister_shash(&sha512_alg);
142 out:
143         return ret;
144 }
145
146 static void __exit fini(void)
147 {
148         crypto_unregister_shash(&sha512_alg);
149         crypto_unregister_shash(&sha384_alg);
150 }
151
152 module_cpu_feature_match(MSA, init);
153 module_exit(fini);
154
155 MODULE_LICENSE("GPL");
156 MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");