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
sha512_init(struct shash_desc * desc)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
sha512_export(struct shash_desc * desc,void * out)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
sha512_import(struct shash_desc * desc,const void * in)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
sha384_init(struct shash_desc * desc)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
init(void)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
fini(void)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");
156