xref: /openbmc/linux/arch/s390/crypto/sha512_s390.c (revision 6724ed7f)
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 <crypto/internal/hash.h>
11 #include <crypto/sha.h>
12 #include <linux/errno.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/cpufeature.h>
17 #include <asm/cpacf.h>
18 
19 #include "sha.h"
20 
21 static int sha512_init(struct shash_desc *desc)
22 {
23 	struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
24 
25 	*(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
26 	*(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
27 	*(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
28 	*(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
29 	*(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
30 	*(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
31 	*(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
32 	*(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
33 	ctx->count = 0;
34 	ctx->func = CPACF_KIMD_SHA_512;
35 
36 	return 0;
37 }
38 
39 static int sha512_export(struct shash_desc *desc, void *out)
40 {
41 	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
42 	struct sha512_state *octx = out;
43 
44 	octx->count[0] = sctx->count;
45 	octx->count[1] = 0;
46 	memcpy(octx->state, sctx->state, sizeof(octx->state));
47 	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
48 	return 0;
49 }
50 
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 	if (unlikely(ictx->count[1]))
57 		return -ERANGE;
58 	sctx->count = ictx->count[0];
59 
60 	memcpy(sctx->state, ictx->state, sizeof(ictx->state));
61 	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
62 	sctx->func = CPACF_KIMD_SHA_512;
63 	return 0;
64 }
65 
66 static struct shash_alg sha512_alg = {
67 	.digestsize	=	SHA512_DIGEST_SIZE,
68 	.init		=	sha512_init,
69 	.update		=	s390_sha_update,
70 	.final		=	s390_sha_final,
71 	.export		=	sha512_export,
72 	.import		=	sha512_import,
73 	.descsize	=	sizeof(struct s390_sha_ctx),
74 	.statesize	=	sizeof(struct sha512_state),
75 	.base		=	{
76 		.cra_name	=	"sha512",
77 		.cra_driver_name=	"sha512-s390",
78 		.cra_priority	=	300,
79 		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
80 		.cra_blocksize	=	SHA512_BLOCK_SIZE,
81 		.cra_module	=	THIS_MODULE,
82 	}
83 };
84 
85 MODULE_ALIAS_CRYPTO("sha512");
86 
87 static int sha384_init(struct shash_desc *desc)
88 {
89 	struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
90 
91 	*(__u64 *)&ctx->state[0] = 0xcbbb9d5dc1059ed8ULL;
92 	*(__u64 *)&ctx->state[2] = 0x629a292a367cd507ULL;
93 	*(__u64 *)&ctx->state[4] = 0x9159015a3070dd17ULL;
94 	*(__u64 *)&ctx->state[6] = 0x152fecd8f70e5939ULL;
95 	*(__u64 *)&ctx->state[8] = 0x67332667ffc00b31ULL;
96 	*(__u64 *)&ctx->state[10] = 0x8eb44a8768581511ULL;
97 	*(__u64 *)&ctx->state[12] = 0xdb0c2e0d64f98fa7ULL;
98 	*(__u64 *)&ctx->state[14] = 0x47b5481dbefa4fa4ULL;
99 	ctx->count = 0;
100 	ctx->func = CPACF_KIMD_SHA_512;
101 
102 	return 0;
103 }
104 
105 static struct shash_alg sha384_alg = {
106 	.digestsize	=	SHA384_DIGEST_SIZE,
107 	.init		=	sha384_init,
108 	.update		=	s390_sha_update,
109 	.final		=	s390_sha_final,
110 	.export		=	sha512_export,
111 	.import		=	sha512_import,
112 	.descsize	=	sizeof(struct s390_sha_ctx),
113 	.statesize	=	sizeof(struct sha512_state),
114 	.base		=	{
115 		.cra_name	=	"sha384",
116 		.cra_driver_name=	"sha384-s390",
117 		.cra_priority	=	300,
118 		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
119 		.cra_blocksize	=	SHA384_BLOCK_SIZE,
120 		.cra_ctxsize	=	sizeof(struct s390_sha_ctx),
121 		.cra_module	=	THIS_MODULE,
122 	}
123 };
124 
125 MODULE_ALIAS_CRYPTO("sha384");
126 
127 static int __init init(void)
128 {
129 	int ret;
130 
131 	if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_512))
132 		return -EOPNOTSUPP;
133 	if ((ret = crypto_register_shash(&sha512_alg)) < 0)
134 		goto out;
135 	if ((ret = crypto_register_shash(&sha384_alg)) < 0)
136 		crypto_unregister_shash(&sha512_alg);
137 out:
138 	return ret;
139 }
140 
141 static void __exit fini(void)
142 {
143 	crypto_unregister_shash(&sha512_alg);
144 	crypto_unregister_shash(&sha384_alg);
145 }
146 
147 module_cpu_feature_match(MSA, init);
148 module_exit(fini);
149 
150 MODULE_LICENSE("GPL");
151 MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");
152