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 <asm/crypto/camellia.h> 9 #include <asm/crypto/glue_helper.h> 10 #include <crypto/algapi.h> 11 #include <crypto/internal/simd.h> 12 #include <linux/crypto.h> 13 #include <linux/err.h> 14 #include <linux/module.h> 15 #include <linux/types.h> 16 17 #define CAMELLIA_AESNI_PARALLEL_BLOCKS 16 18 19 /* 16-way parallel cipher functions (avx/aes-ni) */ 20 asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src); 21 EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way); 22 23 asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src); 24 EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way); 25 26 asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src); 27 EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way); 28 29 static const struct common_glue_ctx camellia_enc = { 30 .num_funcs = 3, 31 .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, 32 33 .funcs = { { 34 .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, 35 .fn_u = { .ecb = camellia_ecb_enc_16way } 36 }, { 37 .num_blocks = 2, 38 .fn_u = { .ecb = camellia_enc_blk_2way } 39 }, { 40 .num_blocks = 1, 41 .fn_u = { .ecb = camellia_enc_blk } 42 } } 43 }; 44 45 static const struct common_glue_ctx camellia_dec = { 46 .num_funcs = 3, 47 .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, 48 49 .funcs = { { 50 .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, 51 .fn_u = { .ecb = camellia_ecb_dec_16way } 52 }, { 53 .num_blocks = 2, 54 .fn_u = { .ecb = camellia_dec_blk_2way } 55 }, { 56 .num_blocks = 1, 57 .fn_u = { .ecb = camellia_dec_blk } 58 } } 59 }; 60 61 static const struct common_glue_ctx camellia_dec_cbc = { 62 .num_funcs = 3, 63 .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, 64 65 .funcs = { { 66 .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, 67 .fn_u = { .cbc = camellia_cbc_dec_16way } 68 }, { 69 .num_blocks = 2, 70 .fn_u = { .cbc = camellia_decrypt_cbc_2way } 71 }, { 72 .num_blocks = 1, 73 .fn_u = { .cbc = camellia_dec_blk } 74 } } 75 }; 76 77 static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key, 78 unsigned int keylen) 79 { 80 return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen); 81 } 82 83 static int ecb_encrypt(struct skcipher_request *req) 84 { 85 return glue_ecb_req_128bit(&camellia_enc, req); 86 } 87 88 static int ecb_decrypt(struct skcipher_request *req) 89 { 90 return glue_ecb_req_128bit(&camellia_dec, req); 91 } 92 93 static int cbc_encrypt(struct skcipher_request *req) 94 { 95 return glue_cbc_encrypt_req_128bit(camellia_enc_blk, req); 96 } 97 98 static int cbc_decrypt(struct skcipher_request *req) 99 { 100 return glue_cbc_decrypt_req_128bit(&camellia_dec_cbc, req); 101 } 102 103 static struct skcipher_alg camellia_algs[] = { 104 { 105 .base.cra_name = "__ecb(camellia)", 106 .base.cra_driver_name = "__ecb-camellia-aesni", 107 .base.cra_priority = 400, 108 .base.cra_flags = CRYPTO_ALG_INTERNAL, 109 .base.cra_blocksize = CAMELLIA_BLOCK_SIZE, 110 .base.cra_ctxsize = sizeof(struct camellia_ctx), 111 .base.cra_module = THIS_MODULE, 112 .min_keysize = CAMELLIA_MIN_KEY_SIZE, 113 .max_keysize = CAMELLIA_MAX_KEY_SIZE, 114 .setkey = camellia_setkey, 115 .encrypt = ecb_encrypt, 116 .decrypt = ecb_decrypt, 117 }, { 118 .base.cra_name = "__cbc(camellia)", 119 .base.cra_driver_name = "__cbc-camellia-aesni", 120 .base.cra_priority = 400, 121 .base.cra_flags = CRYPTO_ALG_INTERNAL, 122 .base.cra_blocksize = CAMELLIA_BLOCK_SIZE, 123 .base.cra_ctxsize = sizeof(struct camellia_ctx), 124 .base.cra_module = THIS_MODULE, 125 .min_keysize = CAMELLIA_MIN_KEY_SIZE, 126 .max_keysize = CAMELLIA_MAX_KEY_SIZE, 127 .ivsize = CAMELLIA_BLOCK_SIZE, 128 .setkey = camellia_setkey, 129 .encrypt = cbc_encrypt, 130 .decrypt = cbc_decrypt, 131 } 132 }; 133 134 static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)]; 135 136 static int __init camellia_aesni_init(void) 137 { 138 const char *feature_name; 139 140 if (!boot_cpu_has(X86_FEATURE_AVX) || 141 !boot_cpu_has(X86_FEATURE_AES) || 142 !boot_cpu_has(X86_FEATURE_OSXSAVE)) { 143 pr_info("AVX or AES-NI instructions are not detected.\n"); 144 return -ENODEV; 145 } 146 147 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, 148 &feature_name)) { 149 pr_info("CPU feature '%s' is not supported.\n", feature_name); 150 return -ENODEV; 151 } 152 153 return simd_register_skciphers_compat(camellia_algs, 154 ARRAY_SIZE(camellia_algs), 155 camellia_simd_algs); 156 } 157 158 static void __exit camellia_aesni_fini(void) 159 { 160 simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs), 161 camellia_simd_algs); 162 } 163 164 module_init(camellia_aesni_init); 165 module_exit(camellia_aesni_fini); 166 167 MODULE_LICENSE("GPL"); 168 MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized"); 169 MODULE_ALIAS_CRYPTO("camellia"); 170 MODULE_ALIAS_CRYPTO("camellia-asm"); 171