1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Cryptographic API.
4 *
5 * s390 implementation of the SHA512 and SHA38 Secure Hash Algorithm.
6 *
7 * Copyright IBM Corp. 2007
8 * Author(s): Jan Glauber (jang@de.ibm.com)
9 */
10 #include <asm/cpacf.h>
11 #include <crypto/internal/hash.h>
12 #include <crypto/sha2.h>
13 #include <linux/cpufeature.h>
14 #include <linux/errno.h>
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17
18 #include "sha.h"
19
sha512_init(struct shash_desc * desc)20 static int sha512_init(struct shash_desc *desc)
21 {
22 struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
23
24 ctx->sha512.state[0] = SHA512_H0;
25 ctx->sha512.state[1] = SHA512_H1;
26 ctx->sha512.state[2] = SHA512_H2;
27 ctx->sha512.state[3] = SHA512_H3;
28 ctx->sha512.state[4] = SHA512_H4;
29 ctx->sha512.state[5] = SHA512_H5;
30 ctx->sha512.state[6] = SHA512_H6;
31 ctx->sha512.state[7] = SHA512_H7;
32 ctx->count = 0;
33 ctx->sha512.count_hi = 0;
34 ctx->func = CPACF_KIMD_SHA_512;
35 ctx->first_message_part = 0;
36
37 return 0;
38 }
39
sha512_export(struct shash_desc * desc,void * out)40 static int sha512_export(struct shash_desc *desc, void *out)
41 {
42 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
43 struct sha512_state *octx = out;
44
45 octx->count[0] = sctx->count;
46 octx->count[1] = sctx->sha512.count_hi;
47 memcpy(octx->state, sctx->state, sizeof(octx->state));
48 return 0;
49 }
50
sha512_import(struct shash_desc * desc,const void * in)51 static int sha512_import(struct shash_desc *desc, const void *in)
52 {
53 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
54 const struct sha512_state *ictx = in;
55
56 sctx->count = ictx->count[0];
57 sctx->sha512.count_hi = ictx->count[1];
58
59 memcpy(sctx->state, ictx->state, sizeof(ictx->state));
60 sctx->func = CPACF_KIMD_SHA_512;
61 sctx->first_message_part = 0;
62 return 0;
63 }
64
65 static struct shash_alg sha512_alg = {
66 .digestsize = SHA512_DIGEST_SIZE,
67 .init = sha512_init,
68 .update = s390_sha_update_blocks,
69 .finup = s390_sha_finup,
70 .export = sha512_export,
71 .import = sha512_import,
72 .descsize = sizeof(struct s390_sha_ctx),
73 .statesize = SHA512_STATE_SIZE,
74 .base = {
75 .cra_name = "sha512",
76 .cra_driver_name= "sha512-s390",
77 .cra_priority = 300,
78 .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY |
79 CRYPTO_AHASH_ALG_FINUP_MAX,
80 .cra_blocksize = SHA512_BLOCK_SIZE,
81 .cra_module = THIS_MODULE,
82 }
83 };
84
85 MODULE_ALIAS_CRYPTO("sha512");
86
sha384_init(struct shash_desc * desc)87 static int sha384_init(struct shash_desc *desc)
88 {
89 struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
90
91 ctx->sha512.state[0] = SHA384_H0;
92 ctx->sha512.state[1] = SHA384_H1;
93 ctx->sha512.state[2] = SHA384_H2;
94 ctx->sha512.state[3] = SHA384_H3;
95 ctx->sha512.state[4] = SHA384_H4;
96 ctx->sha512.state[5] = SHA384_H5;
97 ctx->sha512.state[6] = SHA384_H6;
98 ctx->sha512.state[7] = SHA384_H7;
99 ctx->count = 0;
100 ctx->sha512.count_hi = 0;
101 ctx->func = CPACF_KIMD_SHA_512;
102 ctx->first_message_part = 0;
103
104 return 0;
105 }
106
107 static struct shash_alg sha384_alg = {
108 .digestsize = SHA384_DIGEST_SIZE,
109 .init = sha384_init,
110 .update = s390_sha_update_blocks,
111 .finup = s390_sha_finup,
112 .export = sha512_export,
113 .import = sha512_import,
114 .descsize = sizeof(struct s390_sha_ctx),
115 .statesize = SHA512_STATE_SIZE,
116 .base = {
117 .cra_name = "sha384",
118 .cra_driver_name= "sha384-s390",
119 .cra_priority = 300,
120 .cra_blocksize = SHA384_BLOCK_SIZE,
121 .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY |
122 CRYPTO_AHASH_ALG_FINUP_MAX,
123 .cra_ctxsize = sizeof(struct s390_sha_ctx),
124 .cra_module = THIS_MODULE,
125 }
126 };
127
128 MODULE_ALIAS_CRYPTO("sha384");
129
init(void)130 static int __init init(void)
131 {
132 int ret;
133
134 if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_512))
135 return -ENODEV;
136 if ((ret = crypto_register_shash(&sha512_alg)) < 0)
137 goto out;
138 if ((ret = crypto_register_shash(&sha384_alg)) < 0)
139 crypto_unregister_shash(&sha512_alg);
140 out:
141 return ret;
142 }
143
fini(void)144 static void __exit fini(void)
145 {
146 crypto_unregister_shash(&sha512_alg);
147 crypto_unregister_shash(&sha384_alg);
148 }
149
150 module_cpu_feature_match(S390_CPU_FEATURE_MSA, init);
151 module_exit(fini);
152
153 MODULE_LICENSE("GPL");
154 MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");
155