1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Cryptographic API.
4 *
5 * s390 implementation of the SHA512 and SHA384 Secure Hash Algorithm.
6 *
7 * Copyright IBM Corp. 2019
8 * Author(s): Joerg Schmidbauer (jschmidb@de.ibm.com)
9 */
10 #include <crypto/internal/hash.h>
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/cpufeature.h>
14 #include <crypto/sha.h>
15 #include <crypto/sha3.h>
16 #include <asm/cpacf.h>
17
18 #include "sha.h"
19
sha3_512_init(struct shash_desc * desc)20 static int sha3_512_init(struct shash_desc *desc)
21 {
22 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
23
24 memset(sctx->state, 0, sizeof(sctx->state));
25 sctx->count = 0;
26 sctx->func = CPACF_KIMD_SHA3_512;
27
28 return 0;
29 }
30
sha3_512_export(struct shash_desc * desc,void * out)31 static int sha3_512_export(struct shash_desc *desc, void *out)
32 {
33 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
34 struct sha3_state *octx = out;
35
36 octx->rsiz = sctx->count;
37 octx->rsizw = sctx->count >> 32;
38
39 memcpy(octx->st, sctx->state, sizeof(octx->st));
40 memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
41
42 return 0;
43 }
44
sha3_512_import(struct shash_desc * desc,const void * in)45 static int sha3_512_import(struct shash_desc *desc, const void *in)
46 {
47 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
48 const struct sha3_state *ictx = in;
49
50 if (unlikely(ictx->rsizw))
51 return -ERANGE;
52 sctx->count = ictx->rsiz;
53
54 memcpy(sctx->state, ictx->st, sizeof(ictx->st));
55 memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
56 sctx->func = CPACF_KIMD_SHA3_512;
57
58 return 0;
59 }
60
sha3_384_import(struct shash_desc * desc,const void * in)61 static int sha3_384_import(struct shash_desc *desc, const void *in)
62 {
63 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
64 const struct sha3_state *ictx = in;
65
66 if (unlikely(ictx->rsizw))
67 return -ERANGE;
68 sctx->count = ictx->rsiz;
69
70 memcpy(sctx->state, ictx->st, sizeof(ictx->st));
71 memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
72 sctx->func = CPACF_KIMD_SHA3_384;
73
74 return 0;
75 }
76
77 static struct shash_alg sha3_512_alg = {
78 .digestsize = SHA3_512_DIGEST_SIZE,
79 .init = sha3_512_init,
80 .update = s390_sha_update,
81 .final = s390_sha_final,
82 .export = sha3_512_export,
83 .import = sha3_512_import,
84 .descsize = sizeof(struct s390_sha_ctx),
85 .statesize = sizeof(struct sha3_state),
86 .base = {
87 .cra_name = "sha3-512",
88 .cra_driver_name = "sha3-512-s390",
89 .cra_priority = 300,
90 .cra_blocksize = SHA3_512_BLOCK_SIZE,
91 .cra_module = THIS_MODULE,
92 }
93 };
94
95 MODULE_ALIAS_CRYPTO("sha3-512");
96
sha3_384_init(struct shash_desc * desc)97 static int sha3_384_init(struct shash_desc *desc)
98 {
99 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
100
101 memset(sctx->state, 0, sizeof(sctx->state));
102 sctx->count = 0;
103 sctx->func = CPACF_KIMD_SHA3_384;
104
105 return 0;
106 }
107
108 static struct shash_alg sha3_384_alg = {
109 .digestsize = SHA3_384_DIGEST_SIZE,
110 .init = sha3_384_init,
111 .update = s390_sha_update,
112 .final = s390_sha_final,
113 .export = sha3_512_export, /* same as for 512 */
114 .import = sha3_384_import, /* function code different! */
115 .descsize = sizeof(struct s390_sha_ctx),
116 .statesize = sizeof(struct sha3_state),
117 .base = {
118 .cra_name = "sha3-384",
119 .cra_driver_name = "sha3-384-s390",
120 .cra_priority = 300,
121 .cra_blocksize = SHA3_384_BLOCK_SIZE,
122 .cra_ctxsize = sizeof(struct s390_sha_ctx),
123 .cra_module = THIS_MODULE,
124 }
125 };
126
127 MODULE_ALIAS_CRYPTO("sha3-384");
128
init(void)129 static int __init init(void)
130 {
131 int ret;
132
133 if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_512))
134 return -ENODEV;
135 ret = crypto_register_shash(&sha3_512_alg);
136 if (ret < 0)
137 goto out;
138 ret = crypto_register_shash(&sha3_384_alg);
139 if (ret < 0)
140 crypto_unregister_shash(&sha3_512_alg);
141 out:
142 return ret;
143 }
144
fini(void)145 static void __exit fini(void)
146 {
147 crypto_unregister_shash(&sha3_512_alg);
148 crypto_unregister_shash(&sha3_384_alg);
149 }
150
151 module_cpu_feature_match(MSA, init);
152 module_exit(fini);
153
154 MODULE_LICENSE("GPL");
155 MODULE_DESCRIPTION("SHA3-512 and SHA3-384 Secure Hash Algorithm");
156
