xref: /openbmc/linux/arch/s390/crypto/sha512_s390.c (revision a2cce7a9)
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 
23 #include "sha.h"
24 #include "crypt_s390.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 = 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 = 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	=	CRYPT_S390_PRIORITY,
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 = 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	=	CRYPT_S390_PRIORITY,
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 (!crypt_s390_func_available(KIMD_SHA_512, CRYPT_S390_MSA))
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");
157