summaryrefslogtreecommitdiff
path: root/arch/x86/crypto/camellia_aesni_avx_glue.c
blob: 4e5de6ef206e1394cf20c0605e0d9b84164effd4 (plain)
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
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Glue Code for x86_64/AVX/AES-NI assembler optimized version of Camellia
 *
 * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
 */

#include <asm/crypto/camellia.h>
#include <asm/crypto/glue_helper.h>
#include <crypto/algapi.h>
#include <crypto/internal/simd.h>
#include <crypto/xts.h>
#include <linux/crypto.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/types.h>

#define CAMELLIA_AESNI_PARALLEL_BLOCKS 16

/* 16-way parallel cipher functions (avx/aes-ni) */
asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);

asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);

asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);

asmlinkage void camellia_ctr_16way(const void *ctx, u8 *dst, const u8 *src,
				   le128 *iv);
EXPORT_SYMBOL_GPL(camellia_ctr_16way);

asmlinkage void camellia_xts_enc_16way(const void *ctx, u8 *dst, const u8 *src,
				       le128 *iv);
EXPORT_SYMBOL_GPL(camellia_xts_enc_16way);

asmlinkage void camellia_xts_dec_16way(const void *ctx, u8 *dst, const u8 *src,
				       le128 *iv);
EXPORT_SYMBOL_GPL(camellia_xts_dec_16way);

void camellia_xts_enc(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
{
	glue_xts_crypt_128bit_one(ctx, dst, src, iv, camellia_enc_blk);
}
EXPORT_SYMBOL_GPL(camellia_xts_enc);

void camellia_xts_dec(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
{
	glue_xts_crypt_128bit_one(ctx, dst, src, iv, camellia_dec_blk);
}
EXPORT_SYMBOL_GPL(camellia_xts_dec);

static const struct common_glue_ctx camellia_enc = {
	.num_funcs = 3,
	.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
		.fn_u = { .ecb = camellia_ecb_enc_16way }
	}, {
		.num_blocks = 2,
		.fn_u = { .ecb = camellia_enc_blk_2way }
	}, {
		.num_blocks = 1,
		.fn_u = { .ecb = camellia_enc_blk }
	} }
};

static const struct common_glue_ctx camellia_ctr = {
	.num_funcs = 3,
	.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
		.fn_u = { .ctr = camellia_ctr_16way }
	}, {
		.num_blocks = 2,
		.fn_u = { .ctr = camellia_crypt_ctr_2way }
	}, {
		.num_blocks = 1,
		.fn_u = { .ctr = camellia_crypt_ctr }
	} }
};

static const struct common_glue_ctx camellia_enc_xts = {
	.num_funcs = 2,
	.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
		.fn_u = { .xts = camellia_xts_enc_16way }
	}, {
		.num_blocks = 1,
		.fn_u = { .xts = camellia_xts_enc }
	} }
};

static const struct common_glue_ctx camellia_dec = {
	.num_funcs = 3,
	.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
		.fn_u = { .ecb = camellia_ecb_dec_16way }
	}, {
		.num_blocks = 2,
		.fn_u = { .ecb = camellia_dec_blk_2way }
	}, {
		.num_blocks = 1,
		.fn_u = { .ecb = camellia_dec_blk }
	} }
};

static const struct common_glue_ctx camellia_dec_cbc = {
	.num_funcs = 3,
	.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
		.fn_u = { .cbc = camellia_cbc_dec_16way }
	}, {
		.num_blocks = 2,
		.fn_u = { .cbc = camellia_decrypt_cbc_2way }
	}, {
		.num_blocks = 1,
		.fn_u = { .cbc = camellia_dec_blk }
	} }
};

static const struct common_glue_ctx camellia_dec_xts = {
	.num_funcs = 2,
	.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
		.fn_u = { .xts = camellia_xts_dec_16way }
	}, {
		.num_blocks = 1,
		.fn_u = { .xts = camellia_xts_dec }
	} }
};

static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
			   unsigned int keylen)
{
	return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
}

static int ecb_encrypt(struct skcipher_request *req)
{
	return glue_ecb_req_128bit(&camellia_enc, req);
}

static int ecb_decrypt(struct skcipher_request *req)
{
	return glue_ecb_req_128bit(&camellia_dec, req);
}

static int cbc_encrypt(struct skcipher_request *req)
{
	return glue_cbc_encrypt_req_128bit(camellia_enc_blk, req);
}

static int cbc_decrypt(struct skcipher_request *req)
{
	return glue_cbc_decrypt_req_128bit(&camellia_dec_cbc, req);
}

static int ctr_crypt(struct skcipher_request *req)
{
	return glue_ctr_req_128bit(&camellia_ctr, req);
}

int xts_camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
			unsigned int keylen)
{
	struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
	int err;

	err = xts_verify_key(tfm, key, keylen);
	if (err)
		return err;

	/* first half of xts-key is for crypt */
	err = __camellia_setkey(&ctx->crypt_ctx, key, keylen / 2);
	if (err)
		return err;

	/* second half of xts-key is for tweak */
	return __camellia_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
}
EXPORT_SYMBOL_GPL(xts_camellia_setkey);

static int xts_encrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);

	return glue_xts_req_128bit(&camellia_enc_xts, req, camellia_enc_blk,
				   &ctx->tweak_ctx, &ctx->crypt_ctx, false);
}

static int xts_decrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);

	return glue_xts_req_128bit(&camellia_dec_xts, req, camellia_enc_blk,
				   &ctx->tweak_ctx, &ctx->crypt_ctx, true);
}

static struct skcipher_alg camellia_algs[] = {
	{
		.base.cra_name		= "__ecb(camellia)",
		.base.cra_driver_name	= "__ecb-camellia-aesni",
		.base.cra_priority	= 400,
		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
		.base.cra_blocksize	= CAMELLIA_BLOCK_SIZE,
		.base.cra_ctxsize	= sizeof(struct camellia_ctx),
		.base.cra_module	= THIS_MODULE,
		.min_keysize		= CAMELLIA_MIN_KEY_SIZE,
		.max_keysize		= CAMELLIA_MAX_KEY_SIZE,
		.setkey			= camellia_setkey,
		.encrypt		= ecb_encrypt,
		.decrypt		= ecb_decrypt,
	}, {
		.base.cra_name		= "__cbc(camellia)",
		.base.cra_driver_name	= "__cbc-camellia-aesni",
		.base.cra_priority	= 400,
		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
		.base.cra_blocksize	= CAMELLIA_BLOCK_SIZE,
		.base.cra_ctxsize	= sizeof(struct camellia_ctx),
		.base.cra_module	= THIS_MODULE,
		.min_keysize		= CAMELLIA_MIN_KEY_SIZE,
		.max_keysize		= CAMELLIA_MAX_KEY_SIZE,
		.ivsize			= CAMELLIA_BLOCK_SIZE,
		.setkey			= camellia_setkey,
		.encrypt		= cbc_encrypt,
		.decrypt		= cbc_decrypt,
	}, {
		.base.cra_name		= "__ctr(camellia)",
		.base.cra_driver_name	= "__ctr-camellia-aesni",
		.base.cra_priority	= 400,
		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
		.base.cra_blocksize	= 1,
		.base.cra_ctxsize	= sizeof(struct camellia_ctx),
		.base.cra_module	= THIS_MODULE,
		.min_keysize		= CAMELLIA_MIN_KEY_SIZE,
		.max_keysize		= CAMELLIA_MAX_KEY_SIZE,
		.ivsize			= CAMELLIA_BLOCK_SIZE,
		.chunksize		= CAMELLIA_BLOCK_SIZE,
		.setkey			= camellia_setkey,
		.encrypt		= ctr_crypt,
		.decrypt		= ctr_crypt,
	}, {
		.base.cra_name		= "__xts(camellia)",
		.base.cra_driver_name	= "__xts-camellia-aesni",
		.base.cra_priority	= 400,
		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
		.base.cra_blocksize	= CAMELLIA_BLOCK_SIZE,
		.base.cra_ctxsize	= sizeof(struct camellia_xts_ctx),
		.base.cra_module	= THIS_MODULE,
		.min_keysize		= 2 * CAMELLIA_MIN_KEY_SIZE,
		.max_keysize		= 2 * CAMELLIA_MAX_KEY_SIZE,
		.ivsize			= CAMELLIA_BLOCK_SIZE,
		.setkey			= xts_camellia_setkey,
		.encrypt		= xts_encrypt,
		.decrypt		= xts_decrypt,
	},
};

static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)];

static int __init camellia_aesni_init(void)
{
	const char *feature_name;

	if (!boot_cpu_has(X86_FEATURE_AVX) ||
	    !boot_cpu_has(X86_FEATURE_AES) ||
	    !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
		pr_info("AVX or AES-NI instructions are not detected.\n");
		return -ENODEV;
	}

	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
				&feature_name)) {
		pr_info("CPU feature '%s' is not supported.\n", feature_name);
		return -ENODEV;
	}

	return simd_register_skciphers_compat(camellia_algs,
					      ARRAY_SIZE(camellia_algs),
					      camellia_simd_algs);
}

static void __exit camellia_aesni_fini(void)
{
	simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
				  camellia_simd_algs);
}

module_init(camellia_aesni_init);
module_exit(camellia_aesni_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized");
MODULE_ALIAS_CRYPTO("camellia");
MODULE_ALIAS_CRYPTO("camellia-asm");