1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
// SPDX-License-Identifier: GPL-2.0-only
/* Glue code for CAMELLIA encryption optimized for sparc64 crypto opcodes.
*
* Copyright (C) 2012 David S. Miller <davem@davemloft.net>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/crypto.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/algapi.h>
#include <crypto/internal/skcipher.h>
#include <asm/fpumacro.h>
#include <asm/pstate.h>
#include <asm/elf.h>
#include "opcodes.h"
#define CAMELLIA_MIN_KEY_SIZE 16
#define CAMELLIA_MAX_KEY_SIZE 32
#define CAMELLIA_BLOCK_SIZE 16
#define CAMELLIA_TABLE_BYTE_LEN 272
struct camellia_sparc64_ctx {
u64 encrypt_key[CAMELLIA_TABLE_BYTE_LEN / sizeof(u64)];
u64 decrypt_key[CAMELLIA_TABLE_BYTE_LEN / sizeof(u64)];
int key_len;
};
extern void camellia_sparc64_key_expand(const u32 *in_key, u64 *encrypt_key,
unsigned int key_len, u64 *decrypt_key);
static int camellia_set_key(struct crypto_tfm *tfm, const u8 *_in_key,
unsigned int key_len)
{
struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
const u32 *in_key = (const u32 *) _in_key;
if (key_len != 16 && key_len != 24 && key_len != 32)
return -EINVAL;
ctx->key_len = key_len;
camellia_sparc64_key_expand(in_key, &ctx->encrypt_key[0],
key_len, &ctx->decrypt_key[0]);
return 0;
}
static int camellia_set_key_skcipher(struct crypto_skcipher *tfm,
const u8 *in_key, unsigned int key_len)
{
return camellia_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
}
extern void camellia_sparc64_crypt(const u64 *key, const u32 *input,
u32 *output, unsigned int key_len);
static void camellia_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
camellia_sparc64_crypt(&ctx->encrypt_key[0],
(const u32 *) src,
(u32 *) dst, ctx->key_len);
}
static void camellia_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
camellia_sparc64_crypt(&ctx->decrypt_key[0],
(const u32 *) src,
(u32 *) dst, ctx->key_len);
}
extern void camellia_sparc64_load_keys(const u64 *key, unsigned int key_len);
typedef void ecb_crypt_op(const u64 *input, u64 *output, unsigned int len,
const u64 *key);
extern ecb_crypt_op camellia_sparc64_ecb_crypt_3_grand_rounds;
extern ecb_crypt_op camellia_sparc64_ecb_crypt_4_grand_rounds;
static int __ecb_crypt(struct skcipher_request *req, bool encrypt)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
struct skcipher_walk walk;
ecb_crypt_op *op;
const u64 *key;
unsigned int nbytes;
int err;
op = camellia_sparc64_ecb_crypt_3_grand_rounds;
if (ctx->key_len != 16)
op = camellia_sparc64_ecb_crypt_4_grand_rounds;
err = skcipher_walk_virt(&walk, req, true);
if (err)
return err;
if (encrypt)
key = &ctx->encrypt_key[0];
else
key = &ctx->decrypt_key[0];
camellia_sparc64_load_keys(key, ctx->key_len);
while ((nbytes = walk.nbytes) != 0) {
op(walk.src.virt.addr, walk.dst.virt.addr,
round_down(nbytes, CAMELLIA_BLOCK_SIZE), key);
err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
}
fprs_write(0);
return err;
}
static int ecb_encrypt(struct skcipher_request *req)
{
return __ecb_crypt(req, true);
}
static int ecb_decrypt(struct skcipher_request *req)
{
return __ecb_crypt(req, false);
}
typedef void cbc_crypt_op(const u64 *input, u64 *output, unsigned int len,
const u64 *key, u64 *iv);
extern cbc_crypt_op camellia_sparc64_cbc_encrypt_3_grand_rounds;
extern cbc_crypt_op camellia_sparc64_cbc_encrypt_4_grand_rounds;
extern cbc_crypt_op camellia_sparc64_cbc_decrypt_3_grand_rounds;
extern cbc_crypt_op camellia_sparc64_cbc_decrypt_4_grand_rounds;
static int cbc_encrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
struct skcipher_walk walk;
cbc_crypt_op *op;
const u64 *key;
unsigned int nbytes;
int err;
op = camellia_sparc64_cbc_encrypt_3_grand_rounds;
if (ctx->key_len != 16)
op = camellia_sparc64_cbc_encrypt_4_grand_rounds;
err = skcipher_walk_virt(&walk, req, true);
if (err)
return err;
key = &ctx->encrypt_key[0];
camellia_sparc64_load_keys(key, ctx->key_len);
while ((nbytes = walk.nbytes) != 0) {
op(walk.src.virt.addr, walk.dst.virt.addr,
round_down(nbytes, CAMELLIA_BLOCK_SIZE), key, walk.iv);
err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
}
fprs_write(0);
return err;
}
static int cbc_decrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
struct skcipher_walk walk;
cbc_crypt_op *op;
const u64 *key;
unsigned int nbytes;
int err;
op = camellia_sparc64_cbc_decrypt_3_grand_rounds;
if (ctx->key_len != 16)
op = camellia_sparc64_cbc_decrypt_4_grand_rounds;
err = skcipher_walk_virt(&walk, req, true);
if (err)
return err;
key = &ctx->decrypt_key[0];
camellia_sparc64_load_keys(key, ctx->key_len);
while ((nbytes = walk.nbytes) != 0) {
op(walk.src.virt.addr, walk.dst.virt.addr,
round_down(nbytes, CAMELLIA_BLOCK_SIZE), key, walk.iv);
err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
}
fprs_write(0);
return err;
}
static struct crypto_alg cipher_alg = {
.cra_name = "camellia",
.cra_driver_name = "camellia-sparc64",
.cra_priority = SPARC_CR_OPCODE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = CAMELLIA_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct camellia_sparc64_ctx),
.cra_alignmask = 3,
.cra_module = THIS_MODULE,
.cra_u = {
.cipher = {
.cia_min_keysize = CAMELLIA_MIN_KEY_SIZE,
.cia_max_keysize = CAMELLIA_MAX_KEY_SIZE,
.cia_setkey = camellia_set_key,
.cia_encrypt = camellia_encrypt,
.cia_decrypt = camellia_decrypt
}
}
};
static struct skcipher_alg skcipher_algs[] = {
{
.base.cra_name = "ecb(camellia)",
.base.cra_driver_name = "ecb-camellia-sparc64",
.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct camellia_sparc64_ctx),
.base.cra_alignmask = 7,
.base.cra_module = THIS_MODULE,
.min_keysize = CAMELLIA_MIN_KEY_SIZE,
.max_keysize = CAMELLIA_MAX_KEY_SIZE,
.setkey = camellia_set_key_skcipher,
.encrypt = ecb_encrypt,
.decrypt = ecb_decrypt,
}, {
.base.cra_name = "cbc(camellia)",
.base.cra_driver_name = "cbc-camellia-sparc64",
.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct camellia_sparc64_ctx),
.base.cra_alignmask
|