This source file includes following definitions.
- sha512_sparc64_init
- sha384_sparc64_init
- __sha512_sparc64_update
- sha512_sparc64_update
- sha512_sparc64_final
- sha384_sparc64_final
- sparc64_has_sha512_opcode
- sha512_sparc64_mod_init
- sha512_sparc64_mod_fini
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11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13 #include <crypto/internal/hash.h>
14 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/mm.h>
17 #include <linux/cryptohash.h>
18 #include <linux/types.h>
19 #include <crypto/sha.h>
20
21 #include <asm/pstate.h>
22 #include <asm/elf.h>
23
24 #include "opcodes.h"
25
26 asmlinkage void sha512_sparc64_transform(u64 *digest, const char *data,
27 unsigned int rounds);
28
29 static int sha512_sparc64_init(struct shash_desc *desc)
30 {
31 struct sha512_state *sctx = shash_desc_ctx(desc);
32 sctx->state[0] = SHA512_H0;
33 sctx->state[1] = SHA512_H1;
34 sctx->state[2] = SHA512_H2;
35 sctx->state[3] = SHA512_H3;
36 sctx->state[4] = SHA512_H4;
37 sctx->state[5] = SHA512_H5;
38 sctx->state[6] = SHA512_H6;
39 sctx->state[7] = SHA512_H7;
40 sctx->count[0] = sctx->count[1] = 0;
41
42 return 0;
43 }
44
45 static int sha384_sparc64_init(struct shash_desc *desc)
46 {
47 struct sha512_state *sctx = shash_desc_ctx(desc);
48 sctx->state[0] = SHA384_H0;
49 sctx->state[1] = SHA384_H1;
50 sctx->state[2] = SHA384_H2;
51 sctx->state[3] = SHA384_H3;
52 sctx->state[4] = SHA384_H4;
53 sctx->state[5] = SHA384_H5;
54 sctx->state[6] = SHA384_H6;
55 sctx->state[7] = SHA384_H7;
56 sctx->count[0] = sctx->count[1] = 0;
57
58 return 0;
59 }
60
61 static void __sha512_sparc64_update(struct sha512_state *sctx, const u8 *data,
62 unsigned int len, unsigned int partial)
63 {
64 unsigned int done = 0;
65
66 if ((sctx->count[0] += len) < len)
67 sctx->count[1]++;
68 if (partial) {
69 done = SHA512_BLOCK_SIZE - partial;
70 memcpy(sctx->buf + partial, data, done);
71 sha512_sparc64_transform(sctx->state, sctx->buf, 1);
72 }
73 if (len - done >= SHA512_BLOCK_SIZE) {
74 const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE;
75
76 sha512_sparc64_transform(sctx->state, data + done, rounds);
77 done += rounds * SHA512_BLOCK_SIZE;
78 }
79
80 memcpy(sctx->buf, data + done, len - done);
81 }
82
83 static int sha512_sparc64_update(struct shash_desc *desc, const u8 *data,
84 unsigned int len)
85 {
86 struct sha512_state *sctx = shash_desc_ctx(desc);
87 unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
88
89
90 if (partial + len < SHA512_BLOCK_SIZE) {
91 if ((sctx->count[0] += len) < len)
92 sctx->count[1]++;
93 memcpy(sctx->buf + partial, data, len);
94 } else
95 __sha512_sparc64_update(sctx, data, len, partial);
96
97 return 0;
98 }
99
100 static int sha512_sparc64_final(struct shash_desc *desc, u8 *out)
101 {
102 struct sha512_state *sctx = shash_desc_ctx(desc);
103 unsigned int i, index, padlen;
104 __be64 *dst = (__be64 *)out;
105 __be64 bits[2];
106 static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, };
107
108
109 bits[1] = cpu_to_be64(sctx->count[0] << 3);
110 bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
111
112
113 index = sctx->count[0] % SHA512_BLOCK_SIZE;
114 padlen = (index < 112) ? (112 - index) : ((SHA512_BLOCK_SIZE+112) - index);
115
116
117 if (padlen <= 112) {
118 if ((sctx->count[0] += padlen) < padlen)
119 sctx->count[1]++;
120 memcpy(sctx->buf + index, padding, padlen);
121 } else {
122 __sha512_sparc64_update(sctx, padding, padlen, index);
123 }
124 __sha512_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 112);
125
126
127 for (i = 0; i < 8; i++)
128 dst[i] = cpu_to_be64(sctx->state[i]);
129
130
131 memset(sctx, 0, sizeof(*sctx));
132
133 return 0;
134 }
135
136 static int sha384_sparc64_final(struct shash_desc *desc, u8 *hash)
137 {
138 u8 D[64];
139
140 sha512_sparc64_final(desc, D);
141
142 memcpy(hash, D, 48);
143 memzero_explicit(D, 64);
144
145 return 0;
146 }
147
148 static struct shash_alg sha512 = {
149 .digestsize = SHA512_DIGEST_SIZE,
150 .init = sha512_sparc64_init,
151 .update = sha512_sparc64_update,
152 .final = sha512_sparc64_final,
153 .descsize = sizeof(struct sha512_state),
154 .base = {
155 .cra_name = "sha512",
156 .cra_driver_name= "sha512-sparc64",
157 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
158 .cra_blocksize = SHA512_BLOCK_SIZE,
159 .cra_module = THIS_MODULE,
160 }
161 };
162
163 static struct shash_alg sha384 = {
164 .digestsize = SHA384_DIGEST_SIZE,
165 .init = sha384_sparc64_init,
166 .update = sha512_sparc64_update,
167 .final = sha384_sparc64_final,
168 .descsize = sizeof(struct sha512_state),
169 .base = {
170 .cra_name = "sha384",
171 .cra_driver_name= "sha384-sparc64",
172 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
173 .cra_blocksize = SHA384_BLOCK_SIZE,
174 .cra_module = THIS_MODULE,
175 }
176 };
177
178 static bool __init sparc64_has_sha512_opcode(void)
179 {
180 unsigned long cfr;
181
182 if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
183 return false;
184
185 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
186 if (!(cfr & CFR_SHA512))
187 return false;
188
189 return true;
190 }
191
192 static int __init sha512_sparc64_mod_init(void)
193 {
194 if (sparc64_has_sha512_opcode()) {
195 int ret = crypto_register_shash(&sha384);
196 if (ret < 0)
197 return ret;
198
199 ret = crypto_register_shash(&sha512);
200 if (ret < 0) {
201 crypto_unregister_shash(&sha384);
202 return ret;
203 }
204
205 pr_info("Using sparc64 sha512 opcode optimized SHA-512/SHA-384 implementation\n");
206 return 0;
207 }
208 pr_info("sparc64 sha512 opcode not available.\n");
209 return -ENODEV;
210 }
211
212 static void __exit sha512_sparc64_mod_fini(void)
213 {
214 crypto_unregister_shash(&sha384);
215 crypto_unregister_shash(&sha512);
216 }
217
218 module_init(sha512_sparc64_mod_init);
219 module_exit(sha512_sparc64_mod_fini);
220
221 MODULE_LICENSE("GPL");
222 MODULE_DESCRIPTION("SHA-384 and SHA-512 Secure Hash Algorithm, sparc64 sha512 opcode accelerated");
223
224 MODULE_ALIAS_CRYPTO("sha384");
225 MODULE_ALIAS_CRYPTO("sha512");
226
227 #include "crop_devid.c"