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sha512_s390.c
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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 ([email protected])
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 void *in)
56 {
57  struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
58  const 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, CRYPT_S390_MSA))
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 
152 module_exit(fini);
153 
154 MODULE_LICENSE("GPL");
155 MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");