1
2
3
4
5
6
7
8
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
21static 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
39static 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
51static 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
66static 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
85MODULE_ALIAS_CRYPTO("sha512");
86
87static 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
105static 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
125MODULE_ALIAS_CRYPTO("sha384");
126
127static 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);
137out:
138 return ret;
139}
140
141static void __exit fini(void)
142{
143 crypto_unregister_shash(&sha512_alg);
144 crypto_unregister_shash(&sha384_alg);
145}
146
147module_cpu_feature_match(MSA, init);
148module_exit(fini);
149
150MODULE_LICENSE("GPL");
151MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");
152
