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 <crypto/internal/simd.h>
10 #include <linux/crypto.h>
11 #include <linux/err.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) */
21 asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
22 EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);
23
24 asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
25 EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);
26
27 asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
28 EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);
29
30 static 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
36 static 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
45 static 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
54 static 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
61 static 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
70 static 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_flags = CRYPTO_ALG_INTERNAL,
76 .base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
77 .base.cra_ctxsize = sizeof(struct camellia_ctx),
78 .base.cra_module = THIS_MODULE,
79 .min_keysize = CAMELLIA_MIN_KEY_SIZE,
80 .max_keysize = CAMELLIA_MAX_KEY_SIZE,
81 .setkey = camellia_setkey,
82 .encrypt = ecb_encrypt,
83 .decrypt = ecb_decrypt,
84 }, {
85 .base.cra_name = "__cbc(camellia)",
86 .base.cra_driver_name = "__cbc-camellia-aesni",
87 .base.cra_priority = 400,
88 .base.cra_flags = CRYPTO_ALG_INTERNAL,
89 .base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
90 .base.cra_ctxsize = sizeof(struct camellia_ctx),
91 .base.cra_module = THIS_MODULE,
92 .min_keysize = CAMELLIA_MIN_KEY_SIZE,
93 .max_keysize = CAMELLIA_MAX_KEY_SIZE,
94 .ivsize = CAMELLIA_BLOCK_SIZE,
95 .setkey = camellia_setkey,
96 .encrypt = cbc_encrypt,
97 .decrypt = cbc_decrypt,
98 }
99 };
100
101 static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)];
102
103 static int __init camellia_aesni_init(void)
104 {
105 const char *feature_name;
106
107 if (!boot_cpu_has(X86_FEATURE_AVX) ||
108 !boot_cpu_has(X86_FEATURE_AES) ||
109 !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
110 pr_info("AVX or AES-NI instructions are not detected.\n");
111 return -ENODEV;
112 }
113
114 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
115 &feature_name)) {
116 pr_info("CPU feature '%s' is not supported.\n", feature_name);
117 return -ENODEV;
118 }
119
120 return simd_register_skciphers_compat(camellia_algs,
121 ARRAY_SIZE(camellia_algs),
122 camellia_simd_algs);
123 }
124
125 static void __exit camellia_aesni_fini(void)
126 {
127 simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
128 camellia_simd_algs);
129 }
130
131 module_init(camellia_aesni_init);
132 module_exit(camellia_aesni_fini);
133
134 MODULE_LICENSE("GPL");
135 MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized");
136 MODULE_ALIAS_CRYPTO("camellia");
137 MODULE_ALIAS_CRYPTO("camellia-asm");
138
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