This source file includes following definitions.
- sha1_sparc64_init
- __sha1_sparc64_update
- sha1_sparc64_update
- sha1_sparc64_final
- sha1_sparc64_export
- sha1_sparc64_import
- sparc64_has_sha1_opcode
- sha1_sparc64_mod_init
- sha1_sparc64_mod_fini
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12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14 #include <crypto/internal/hash.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/mm.h>
18 #include <linux/cryptohash.h>
19 #include <linux/types.h>
20 #include <crypto/sha.h>
21
22 #include <asm/pstate.h>
23 #include <asm/elf.h>
24
25 #include "opcodes.h"
26
27 asmlinkage void sha1_sparc64_transform(u32 *digest, const char *data,
28 unsigned int rounds);
29
30 static int sha1_sparc64_init(struct shash_desc *desc)
31 {
32 struct sha1_state *sctx = shash_desc_ctx(desc);
33
34 *sctx = (struct sha1_state){
35 .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
36 };
37
38 return 0;
39 }
40
41 static void __sha1_sparc64_update(struct sha1_state *sctx, const u8 *data,
42 unsigned int len, unsigned int partial)
43 {
44 unsigned int done = 0;
45
46 sctx->count += len;
47 if (partial) {
48 done = SHA1_BLOCK_SIZE - partial;
49 memcpy(sctx->buffer + partial, data, done);
50 sha1_sparc64_transform(sctx->state, sctx->buffer, 1);
51 }
52 if (len - done >= SHA1_BLOCK_SIZE) {
53 const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;
54
55 sha1_sparc64_transform(sctx->state, data + done, rounds);
56 done += rounds * SHA1_BLOCK_SIZE;
57 }
58
59 memcpy(sctx->buffer, data + done, len - done);
60 }
61
62 static int sha1_sparc64_update(struct shash_desc *desc, const u8 *data,
63 unsigned int len)
64 {
65 struct sha1_state *sctx = shash_desc_ctx(desc);
66 unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
67
68
69 if (partial + len < SHA1_BLOCK_SIZE) {
70 sctx->count += len;
71 memcpy(sctx->buffer + partial, data, len);
72 } else
73 __sha1_sparc64_update(sctx, data, len, partial);
74
75 return 0;
76 }
77
78
79 static int sha1_sparc64_final(struct shash_desc *desc, u8 *out)
80 {
81 struct sha1_state *sctx = shash_desc_ctx(desc);
82 unsigned int i, index, padlen;
83 __be32 *dst = (__be32 *)out;
84 __be64 bits;
85 static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
86
87 bits = cpu_to_be64(sctx->count << 3);
88
89
90 index = sctx->count % SHA1_BLOCK_SIZE;
91 padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index);
92
93
94 if (padlen <= 56) {
95 sctx->count += padlen;
96 memcpy(sctx->buffer + index, padding, padlen);
97 } else {
98 __sha1_sparc64_update(sctx, padding, padlen, index);
99 }
100 __sha1_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
101
102
103 for (i = 0; i < 5; i++)
104 dst[i] = cpu_to_be32(sctx->state[i]);
105
106
107 memset(sctx, 0, sizeof(*sctx));
108
109 return 0;
110 }
111
112 static int sha1_sparc64_export(struct shash_desc *desc, void *out)
113 {
114 struct sha1_state *sctx = shash_desc_ctx(desc);
115
116 memcpy(out, sctx, sizeof(*sctx));
117
118 return 0;
119 }
120
121 static int sha1_sparc64_import(struct shash_desc *desc, const void *in)
122 {
123 struct sha1_state *sctx = shash_desc_ctx(desc);
124
125 memcpy(sctx, in, sizeof(*sctx));
126
127 return 0;
128 }
129
130 static struct shash_alg alg = {
131 .digestsize = SHA1_DIGEST_SIZE,
132 .init = sha1_sparc64_init,
133 .update = sha1_sparc64_update,
134 .final = sha1_sparc64_final,
135 .export = sha1_sparc64_export,
136 .import = sha1_sparc64_import,
137 .descsize = sizeof(struct sha1_state),
138 .statesize = sizeof(struct sha1_state),
139 .base = {
140 .cra_name = "sha1",
141 .cra_driver_name= "sha1-sparc64",
142 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
143 .cra_blocksize = SHA1_BLOCK_SIZE,
144 .cra_module = THIS_MODULE,
145 }
146 };
147
148 static bool __init sparc64_has_sha1_opcode(void)
149 {
150 unsigned long cfr;
151
152 if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
153 return false;
154
155 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
156 if (!(cfr & CFR_SHA1))
157 return false;
158
159 return true;
160 }
161
162 static int __init sha1_sparc64_mod_init(void)
163 {
164 if (sparc64_has_sha1_opcode()) {
165 pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n");
166 return crypto_register_shash(&alg);
167 }
168 pr_info("sparc64 sha1 opcode not available.\n");
169 return -ENODEV;
170 }
171
172 static void __exit sha1_sparc64_mod_fini(void)
173 {
174 crypto_unregister_shash(&alg);
175 }
176
177 module_init(sha1_sparc64_mod_init);
178 module_exit(sha1_sparc64_mod_fini);
179
180 MODULE_LICENSE("GPL");
181 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, sparc64 sha1 opcode accelerated");
182
183 MODULE_ALIAS_CRYPTO("sha1");
184
185 #include "crop_devid.c"