tjh.dev
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/export.h>
12#include <linux/module.h>
13#include <linux/types.h>
14
15#include "camellia.h"
16#include "ecb_cbc_helpers.h"
17
18#define CAMELLIA_AESNI_PARALLEL_BLOCKS 16
19
20/* 16-way parallel cipher functions (avx/aes-ni) */
21asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
22EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);
23
24asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
25EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);
26
27asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
28EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);
29
30static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
31 unsigned int keylen)
32{
33 return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
34}
35
36static int ecb_encrypt(struct skcipher_request *req)
37{
38 ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
39 ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_enc_16way);
40 ECB_BLOCK(2, camellia_enc_blk_2way);
41 ECB_BLOCK(1, camellia_enc_blk);
42 ECB_WALK_END();
43}
44
45static int ecb_decrypt(struct skcipher_request *req)
46{
47 ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
48 ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_dec_16way);
49 ECB_BLOCK(2, camellia_dec_blk_2way);
50 ECB_BLOCK(1, camellia_dec_blk);
51 ECB_WALK_END();
52}
53
54static int cbc_encrypt(struct skcipher_request *req)
55{
56 CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, -1);
57 CBC_ENC_BLOCK(camellia_enc_blk);
58 CBC_WALK_END();
59}
60
61static int cbc_decrypt(struct skcipher_request *req)
62{
63 CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
64 CBC_DEC_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_cbc_dec_16way);
65 CBC_DEC_BLOCK(2, camellia_decrypt_cbc_2way);
66 CBC_DEC_BLOCK(1, camellia_dec_blk);
67 CBC_WALK_END();
68}
69
70static struct skcipher_alg camellia_algs[] = {
71 {
72 .base.cra_name = "ecb(camellia)",
73 .base.cra_driver_name = "ecb-camellia-aesni",
74 .base.cra_priority = 400,
75 .base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
76 .base.cra_ctxsize = sizeof(struct camellia_ctx),
77 .base.cra_module = THIS_MODULE,
78 .min_keysize = CAMELLIA_MIN_KEY_SIZE,
79 .max_keysize = CAMELLIA_MAX_KEY_SIZE,
80 .setkey = camellia_setkey,
81 .encrypt = ecb_encrypt,
82 .decrypt = ecb_decrypt,
83 }, {
84 .base.cra_name = "cbc(camellia)",
85 .base.cra_driver_name = "cbc-camellia-aesni",
86 .base.cra_priority = 400,
87 .base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
88 .base.cra_ctxsize = sizeof(struct camellia_ctx),
89 .base.cra_module = THIS_MODULE,
90 .min_keysize = CAMELLIA_MIN_KEY_SIZE,
91 .max_keysize = CAMELLIA_MAX_KEY_SIZE,
92 .ivsize = CAMELLIA_BLOCK_SIZE,
93 .setkey = camellia_setkey,
94 .encrypt = cbc_encrypt,
95 .decrypt = cbc_decrypt,
96 }
97};
98
99static int __init camellia_aesni_init(void)
100{
101 const char *feature_name;
102
103 if (!boot_cpu_has(X86_FEATURE_AVX) ||
104 !boot_cpu_has(X86_FEATURE_AES) ||
105 !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
106 pr_info("AVX or AES-NI instructions are not detected.\n");
107 return -ENODEV;
108 }
109
110 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
111 &feature_name)) {
112 pr_info("CPU feature '%s' is not supported.\n", feature_name);
113 return -ENODEV;
114 }
115
116 return crypto_register_skciphers(camellia_algs,
117 ARRAY_SIZE(camellia_algs));
118}
119
120static void __exit camellia_aesni_fini(void)
121{
122 crypto_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs));
123}
124
125module_init(camellia_aesni_init);
126module_exit(camellia_aesni_fini);
127
128MODULE_LICENSE("GPL");
129MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized");
130MODULE_ALIAS_CRYPTO("camellia");
131MODULE_ALIAS_CRYPTO("camellia-asm");