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Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Glue Code for x86_64/AVX/AES-NI assembler optimized version of Camellia
4 *
5 * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
6 */
7
8#include <crypto/algapi.h>
9#include <linux/crypto.h>
10#include <linux/err.h>
11#include <linux/module.h>
12#include <linux/types.h>
13
14#include "camellia.h"
15#include "ecb_cbc_helpers.h"
16
17#define CAMELLIA_AESNI_PARALLEL_BLOCKS 16
18
19/* 16-way parallel cipher functions (avx/aes-ni) */
20asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
21EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);
22
23asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
24EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);
25
26asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
27EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);
28
29static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
30 unsigned int keylen)
31{
32 return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
33}
34
35static int ecb_encrypt(struct skcipher_request *req)
36{
37 ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
38 ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_enc_16way);
39 ECB_BLOCK(2, camellia_enc_blk_2way);
40 ECB_BLOCK(1, camellia_enc_blk);
41 ECB_WALK_END();
42}
43
44static int ecb_decrypt(struct skcipher_request *req)
45{
46 ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
47 ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_dec_16way);
48 ECB_BLOCK(2, camellia_dec_blk_2way);
49 ECB_BLOCK(1, camellia_dec_blk);
50 ECB_WALK_END();
51}
52
53static int cbc_encrypt(struct skcipher_request *req)
54{
55 CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, -1);
56 CBC_ENC_BLOCK(camellia_enc_blk);
57 CBC_WALK_END();
58}
59
60static int cbc_decrypt(struct skcipher_request *req)
61{
62 CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
63 CBC_DEC_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_cbc_dec_16way);
64 CBC_DEC_BLOCK(2, camellia_decrypt_cbc_2way);
65 CBC_DEC_BLOCK(1, camellia_dec_blk);
66 CBC_WALK_END();
67}
68
69static struct skcipher_alg camellia_algs[] = {
70 {
71 .base.cra_name = "ecb(camellia)",
72 .base.cra_driver_name = "ecb-camellia-aesni",
73 .base.cra_priority = 400,
74 .base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
75 .base.cra_ctxsize = sizeof(struct camellia_ctx),
76 .base.cra_module = THIS_MODULE,
77 .min_keysize = CAMELLIA_MIN_KEY_SIZE,
78 .max_keysize = CAMELLIA_MAX_KEY_SIZE,
79 .setkey = camellia_setkey,
80 .encrypt = ecb_encrypt,
81 .decrypt = ecb_decrypt,
82 }, {
83 .base.cra_name = "cbc(camellia)",
84 .base.cra_driver_name = "cbc-camellia-aesni",
85 .base.cra_priority = 400,
86 .base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
87 .base.cra_ctxsize = sizeof(struct camellia_ctx),
88 .base.cra_module = THIS_MODULE,
89 .min_keysize = CAMELLIA_MIN_KEY_SIZE,
90 .max_keysize = CAMELLIA_MAX_KEY_SIZE,
91 .ivsize = CAMELLIA_BLOCK_SIZE,
92 .setkey = camellia_setkey,
93 .encrypt = cbc_encrypt,
94 .decrypt = cbc_decrypt,
95 }
96};
97
98static int __init camellia_aesni_init(void)
99{
100 const char *feature_name;
101
102 if (!boot_cpu_has(X86_FEATURE_AVX) ||
103 !boot_cpu_has(X86_FEATURE_AES) ||
104 !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
105 pr_info("AVX or AES-NI instructions are not detected.\n");
106 return -ENODEV;
107 }
108
109 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
110 &feature_name)) {
111 pr_info("CPU feature '%s' is not supported.\n", feature_name);
112 return -ENODEV;
113 }
114
115 return crypto_register_skciphers(camellia_algs,
116 ARRAY_SIZE(camellia_algs));
117}
118
119static void __exit camellia_aesni_fini(void)
120{
121 crypto_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs));
122}
123
124module_init(camellia_aesni_init);
125module_exit(camellia_aesni_fini);
126
127MODULE_LICENSE("GPL");
128MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized");
129MODULE_ALIAS_CRYPTO("camellia");
130MODULE_ALIAS_CRYPTO("camellia-asm");