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