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1// SPDX-License-Identifier: GPL-2.0-only
2/* Glue code for SHA256 hashing optimized for sparc64 crypto opcodes.
3 *
4 * This is based largely upon crypto/sha256_generic.c
5 *
6 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
7 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
8 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
9 * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
10 */
11
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/types.h>
19#include <crypto/sha2.h>
20#include <crypto/sha256_base.h>
21
22#include <asm/pstate.h>
23#include <asm/elf.h>
24
25#include "opcodes.h"
26
27asmlinkage void sha256_sparc64_transform(u32 *digest, const char *data,
28 unsigned int rounds);
29
30static void __sha256_sparc64_update(struct sha256_state *sctx, const u8 *data,
31 unsigned int len, unsigned int partial)
32{
33 unsigned int done = 0;
34
35 sctx->count += len;
36 if (partial) {
37 done = SHA256_BLOCK_SIZE - partial;
38 memcpy(sctx->buf + partial, data, done);
39 sha256_sparc64_transform(sctx->state, sctx->buf, 1);
40 }
41 if (len - done >= SHA256_BLOCK_SIZE) {
42 const unsigned int rounds = (len - done) / SHA256_BLOCK_SIZE;
43
44 sha256_sparc64_transform(sctx->state, data + done, rounds);
45 done += rounds * SHA256_BLOCK_SIZE;
46 }
47
48 memcpy(sctx->buf, data + done, len - done);
49}
50
51static int sha256_sparc64_update(struct shash_desc *desc, const u8 *data,
52 unsigned int len)
53{
54 struct sha256_state *sctx = shash_desc_ctx(desc);
55 unsigned int partial = sctx->count % SHA256_BLOCK_SIZE;
56
57 /* Handle the fast case right here */
58 if (partial + len < SHA256_BLOCK_SIZE) {
59 sctx->count += len;
60 memcpy(sctx->buf + partial, data, len);
61 } else
62 __sha256_sparc64_update(sctx, data, len, partial);
63
64 return 0;
65}
66
67static int sha256_sparc64_final(struct shash_desc *desc, u8 *out)
68{
69 struct sha256_state *sctx = shash_desc_ctx(desc);
70 unsigned int i, index, padlen;
71 __be32 *dst = (__be32 *)out;
72 __be64 bits;
73 static const u8 padding[SHA256_BLOCK_SIZE] = { 0x80, };
74
75 bits = cpu_to_be64(sctx->count << 3);
76
77 /* Pad out to 56 mod 64 and append length */
78 index = sctx->count % SHA256_BLOCK_SIZE;
79 padlen = (index < 56) ? (56 - index) : ((SHA256_BLOCK_SIZE+56) - index);
80
81 /* We need to fill a whole block for __sha256_sparc64_update() */
82 if (padlen <= 56) {
83 sctx->count += padlen;
84 memcpy(sctx->buf + index, padding, padlen);
85 } else {
86 __sha256_sparc64_update(sctx, padding, padlen, index);
87 }
88 __sha256_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
89
90 /* Store state in digest */
91 for (i = 0; i < 8; i++)
92 dst[i] = cpu_to_be32(sctx->state[i]);
93
94 /* Wipe context */
95 memset(sctx, 0, sizeof(*sctx));
96
97 return 0;
98}
99
100static int sha224_sparc64_final(struct shash_desc *desc, u8 *hash)
101{
102 u8 D[SHA256_DIGEST_SIZE];
103
104 sha256_sparc64_final(desc, D);
105
106 memcpy(hash, D, SHA224_DIGEST_SIZE);
107 memzero_explicit(D, SHA256_DIGEST_SIZE);
108
109 return 0;
110}
111
112static int sha256_sparc64_export(struct shash_desc *desc, void *out)
113{
114 struct sha256_state *sctx = shash_desc_ctx(desc);
115
116 memcpy(out, sctx, sizeof(*sctx));
117 return 0;
118}
119
120static int sha256_sparc64_import(struct shash_desc *desc, const void *in)
121{
122 struct sha256_state *sctx = shash_desc_ctx(desc);
123
124 memcpy(sctx, in, sizeof(*sctx));
125 return 0;
126}
127
128static struct shash_alg sha256_alg = {
129 .digestsize = SHA256_DIGEST_SIZE,
130 .init = sha256_base_init,
131 .update = sha256_sparc64_update,
132 .final = sha256_sparc64_final,
133 .export = sha256_sparc64_export,
134 .import = sha256_sparc64_import,
135 .descsize = sizeof(struct sha256_state),
136 .statesize = sizeof(struct sha256_state),
137 .base = {
138 .cra_name = "sha256",
139 .cra_driver_name= "sha256-sparc64",
140 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
141 .cra_blocksize = SHA256_BLOCK_SIZE,
142 .cra_module = THIS_MODULE,
143 }
144};
145
146static struct shash_alg sha224_alg = {
147 .digestsize = SHA224_DIGEST_SIZE,
148 .init = sha224_base_init,
149 .update = sha256_sparc64_update,
150 .final = sha224_sparc64_final,
151 .descsize = sizeof(struct sha256_state),
152 .base = {
153 .cra_name = "sha224",
154 .cra_driver_name= "sha224-sparc64",
155 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
156 .cra_blocksize = SHA224_BLOCK_SIZE,
157 .cra_module = THIS_MODULE,
158 }
159};
160
161static bool __init sparc64_has_sha256_opcode(void)
162{
163 unsigned long cfr;
164
165 if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
166 return false;
167
168 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
169 if (!(cfr & CFR_SHA256))
170 return false;
171
172 return true;
173}
174
175static int __init sha256_sparc64_mod_init(void)
176{
177 if (sparc64_has_sha256_opcode()) {
178 int ret = crypto_register_shash(&sha224_alg);
179 if (ret < 0)
180 return ret;
181
182 ret = crypto_register_shash(&sha256_alg);
183 if (ret < 0) {
184 crypto_unregister_shash(&sha224_alg);
185 return ret;
186 }
187
188 pr_info("Using sparc64 sha256 opcode optimized SHA-256/SHA-224 implementation\n");
189 return 0;
190 }
191 pr_info("sparc64 sha256 opcode not available.\n");
192 return -ENODEV;
193}
194
195static void __exit sha256_sparc64_mod_fini(void)
196{
197 crypto_unregister_shash(&sha224_alg);
198 crypto_unregister_shash(&sha256_alg);
199}
200
201module_init(sha256_sparc64_mod_init);
202module_exit(sha256_sparc64_mod_fini);
203
204MODULE_LICENSE("GPL");
205MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm, sparc64 sha256 opcode accelerated");
206
207MODULE_ALIAS_CRYPTO("sha224");
208MODULE_ALIAS_CRYPTO("sha256");
209
210#include "crop_devid.c"
1/* Glue code for SHA256 hashing optimized for sparc64 crypto opcodes.
2 *
3 * This is based largely upon crypto/sha256_generic.c
4 *
5 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
6 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
7 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
8 * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
9 */
10
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
26asmlinkage void sha256_sparc64_transform(u32 *digest, const char *data,
27 unsigned int rounds);
28
29static int sha224_sparc64_init(struct shash_desc *desc)
30{
31 struct sha256_state *sctx = shash_desc_ctx(desc);
32 sctx->state[0] = SHA224_H0;
33 sctx->state[1] = SHA224_H1;
34 sctx->state[2] = SHA224_H2;
35 sctx->state[3] = SHA224_H3;
36 sctx->state[4] = SHA224_H4;
37 sctx->state[5] = SHA224_H5;
38 sctx->state[6] = SHA224_H6;
39 sctx->state[7] = SHA224_H7;
40 sctx->count = 0;
41
42 return 0;
43}
44
45static int sha256_sparc64_init(struct shash_desc *desc)
46{
47 struct sha256_state *sctx = shash_desc_ctx(desc);
48 sctx->state[0] = SHA256_H0;
49 sctx->state[1] = SHA256_H1;
50 sctx->state[2] = SHA256_H2;
51 sctx->state[3] = SHA256_H3;
52 sctx->state[4] = SHA256_H4;
53 sctx->state[5] = SHA256_H5;
54 sctx->state[6] = SHA256_H6;
55 sctx->state[7] = SHA256_H7;
56 sctx->count = 0;
57
58 return 0;
59}
60
61static void __sha256_sparc64_update(struct sha256_state *sctx, const u8 *data,
62 unsigned int len, unsigned int partial)
63{
64 unsigned int done = 0;
65
66 sctx->count += len;
67 if (partial) {
68 done = SHA256_BLOCK_SIZE - partial;
69 memcpy(sctx->buf + partial, data, done);
70 sha256_sparc64_transform(sctx->state, sctx->buf, 1);
71 }
72 if (len - done >= SHA256_BLOCK_SIZE) {
73 const unsigned int rounds = (len - done) / SHA256_BLOCK_SIZE;
74
75 sha256_sparc64_transform(sctx->state, data + done, rounds);
76 done += rounds * SHA256_BLOCK_SIZE;
77 }
78
79 memcpy(sctx->buf, data + done, len - done);
80}
81
82static int sha256_sparc64_update(struct shash_desc *desc, const u8 *data,
83 unsigned int len)
84{
85 struct sha256_state *sctx = shash_desc_ctx(desc);
86 unsigned int partial = sctx->count % SHA256_BLOCK_SIZE;
87
88 /* Handle the fast case right here */
89 if (partial + len < SHA256_BLOCK_SIZE) {
90 sctx->count += len;
91 memcpy(sctx->buf + partial, data, len);
92 } else
93 __sha256_sparc64_update(sctx, data, len, partial);
94
95 return 0;
96}
97
98static int sha256_sparc64_final(struct shash_desc *desc, u8 *out)
99{
100 struct sha256_state *sctx = shash_desc_ctx(desc);
101 unsigned int i, index, padlen;
102 __be32 *dst = (__be32 *)out;
103 __be64 bits;
104 static const u8 padding[SHA256_BLOCK_SIZE] = { 0x80, };
105
106 bits = cpu_to_be64(sctx->count << 3);
107
108 /* Pad out to 56 mod 64 and append length */
109 index = sctx->count % SHA256_BLOCK_SIZE;
110 padlen = (index < 56) ? (56 - index) : ((SHA256_BLOCK_SIZE+56) - index);
111
112 /* We need to fill a whole block for __sha256_sparc64_update() */
113 if (padlen <= 56) {
114 sctx->count += padlen;
115 memcpy(sctx->buf + index, padding, padlen);
116 } else {
117 __sha256_sparc64_update(sctx, padding, padlen, index);
118 }
119 __sha256_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
120
121 /* Store state in digest */
122 for (i = 0; i < 8; i++)
123 dst[i] = cpu_to_be32(sctx->state[i]);
124
125 /* Wipe context */
126 memset(sctx, 0, sizeof(*sctx));
127
128 return 0;
129}
130
131static int sha224_sparc64_final(struct shash_desc *desc, u8 *hash)
132{
133 u8 D[SHA256_DIGEST_SIZE];
134
135 sha256_sparc64_final(desc, D);
136
137 memcpy(hash, D, SHA224_DIGEST_SIZE);
138 memzero_explicit(D, SHA256_DIGEST_SIZE);
139
140 return 0;
141}
142
143static int sha256_sparc64_export(struct shash_desc *desc, void *out)
144{
145 struct sha256_state *sctx = shash_desc_ctx(desc);
146
147 memcpy(out, sctx, sizeof(*sctx));
148 return 0;
149}
150
151static int sha256_sparc64_import(struct shash_desc *desc, const void *in)
152{
153 struct sha256_state *sctx = shash_desc_ctx(desc);
154
155 memcpy(sctx, in, sizeof(*sctx));
156 return 0;
157}
158
159static struct shash_alg sha256 = {
160 .digestsize = SHA256_DIGEST_SIZE,
161 .init = sha256_sparc64_init,
162 .update = sha256_sparc64_update,
163 .final = sha256_sparc64_final,
164 .export = sha256_sparc64_export,
165 .import = sha256_sparc64_import,
166 .descsize = sizeof(struct sha256_state),
167 .statesize = sizeof(struct sha256_state),
168 .base = {
169 .cra_name = "sha256",
170 .cra_driver_name= "sha256-sparc64",
171 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
172 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
173 .cra_blocksize = SHA256_BLOCK_SIZE,
174 .cra_module = THIS_MODULE,
175 }
176};
177
178static struct shash_alg sha224 = {
179 .digestsize = SHA224_DIGEST_SIZE,
180 .init = sha224_sparc64_init,
181 .update = sha256_sparc64_update,
182 .final = sha224_sparc64_final,
183 .descsize = sizeof(struct sha256_state),
184 .base = {
185 .cra_name = "sha224",
186 .cra_driver_name= "sha224-sparc64",
187 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
188 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
189 .cra_blocksize = SHA224_BLOCK_SIZE,
190 .cra_module = THIS_MODULE,
191 }
192};
193
194static bool __init sparc64_has_sha256_opcode(void)
195{
196 unsigned long cfr;
197
198 if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
199 return false;
200
201 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
202 if (!(cfr & CFR_SHA256))
203 return false;
204
205 return true;
206}
207
208static int __init sha256_sparc64_mod_init(void)
209{
210 if (sparc64_has_sha256_opcode()) {
211 int ret = crypto_register_shash(&sha224);
212 if (ret < 0)
213 return ret;
214
215 ret = crypto_register_shash(&sha256);
216 if (ret < 0) {
217 crypto_unregister_shash(&sha224);
218 return ret;
219 }
220
221 pr_info("Using sparc64 sha256 opcode optimized SHA-256/SHA-224 implementation\n");
222 return 0;
223 }
224 pr_info("sparc64 sha256 opcode not available.\n");
225 return -ENODEV;
226}
227
228static void __exit sha256_sparc64_mod_fini(void)
229{
230 crypto_unregister_shash(&sha224);
231 crypto_unregister_shash(&sha256);
232}
233
234module_init(sha256_sparc64_mod_init);
235module_exit(sha256_sparc64_mod_fini);
236
237MODULE_LICENSE("GPL");
238MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm, sparc64 sha256 opcode accelerated");
239
240MODULE_ALIAS_CRYPTO("sha224");
241MODULE_ALIAS_CRYPTO("sha256");
242
243#include "crop_devid.c"