1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Glue Code for x86_64/AVX2/AES-NI assembler optimized version of Camellia
4 *
5 * Copyright © 2013 Jussi Kivilinna <jussi.kivilinna@mbnet.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 #define CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS 32
20
21 /* 32-way AVX2/AES-NI parallel cipher functions */
22 asmlinkage void camellia_ecb_enc_32way(const void *ctx, u8 *dst, const u8 *src);
23 asmlinkage void camellia_ecb_dec_32way(const void *ctx, u8 *dst, const u8 *src);
24
25 asmlinkage void camellia_cbc_dec_32way(const void *ctx, u8 *dst, const u8 *src);
26
27 static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
28 unsigned int keylen)
29 {
30 return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
31 }
32
33 static int ecb_encrypt(struct skcipher_request *req)
34 {
35 ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
36 ECB_BLOCK(CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS, camellia_ecb_enc_32way);
37 ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_enc_16way);
38 ECB_BLOCK(2, camellia_enc_blk_2way);
39 ECB_BLOCK(1, camellia_enc_blk);
40 ECB_WALK_END();
41 }
42
43 static int ecb_decrypt(struct skcipher_request *req)
44 {
45 ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
46 ECB_BLOCK(CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS, camellia_ecb_dec_32way);
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
53 static 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
60 static 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_AVX2_PARALLEL_BLOCKS, camellia_cbc_dec_32way);
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-avx2",
74 .base.cra_priority = 500,
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-avx2",
87 .base.cra_priority = 500,
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_AVX2) ||
109 !boot_cpu_has(X86_FEATURE_AES) ||
110 !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
111 pr_info("AVX2 or AES-NI instructions are not detected.\n");
112 return -ENODEV;
113 }
114
115 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
116 &feature_name)) {
117 pr_info("CPU feature '%s' is not supported.\n", feature_name);
118 return -ENODEV;
119 }
120
121 return simd_register_skciphers_compat(camellia_algs,
122 ARRAY_SIZE(camellia_algs),
123 camellia_simd_algs);
124 }
125
126 static void __exit camellia_aesni_fini(void)
127 {
128 simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
129 camellia_simd_algs);
130 }
131
132 module_init(camellia_aesni_init);
133 module_exit(camellia_aesni_fini);
134
135 MODULE_LICENSE("GPL");
136 MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX2 optimized");
137 MODULE_ALIAS_CRYPTO("camellia");
138 MODULE_ALIAS_CRYPTO("camellia-asm");
139
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