1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Glue Code for the AVX2/AES-NI/GFNI assembler implementation of the ARIA Cipher 4 * 5 * Copyright (c) 2022 Taehee Yoo <ap420073@gmail.com> 6 */ 7 8 #include <crypto/algapi.h> 9 #include <crypto/internal/simd.h> 10 #include <crypto/aria.h> 11 #include <linux/crypto.h> 12 #include <linux/err.h> 13 #include <linux/module.h> 14 #include <linux/types.h> 15 16 #include "ecb_cbc_helpers.h" 17 #include "aria-avx.h" 18 19 asmlinkage void aria_aesni_avx2_encrypt_32way(const void *ctx, u8 *dst, 20 const u8 *src); 21 EXPORT_SYMBOL_GPL(aria_aesni_avx2_encrypt_32way); 22 asmlinkage void aria_aesni_avx2_decrypt_32way(const void *ctx, u8 *dst, 23 const u8 *src); 24 EXPORT_SYMBOL_GPL(aria_aesni_avx2_decrypt_32way); 25 asmlinkage void aria_aesni_avx2_ctr_crypt_32way(const void *ctx, u8 *dst, 26 const u8 *src, 27 u8 *keystream, u8 *iv); 28 EXPORT_SYMBOL_GPL(aria_aesni_avx2_ctr_crypt_32way); 29 #ifdef CONFIG_AS_GFNI 30 asmlinkage void aria_aesni_avx2_gfni_encrypt_32way(const void *ctx, u8 *dst, 31 const u8 *src); 32 EXPORT_SYMBOL_GPL(aria_aesni_avx2_gfni_encrypt_32way); 33 asmlinkage void aria_aesni_avx2_gfni_decrypt_32way(const void *ctx, u8 *dst, 34 const u8 *src); 35 EXPORT_SYMBOL_GPL(aria_aesni_avx2_gfni_decrypt_32way); 36 asmlinkage void aria_aesni_avx2_gfni_ctr_crypt_32way(const void *ctx, u8 *dst, 37 const u8 *src, 38 u8 *keystream, u8 *iv); 39 EXPORT_SYMBOL_GPL(aria_aesni_avx2_gfni_ctr_crypt_32way); 40 #endif /* CONFIG_AS_GFNI */ 41 42 static struct aria_avx_ops aria_ops; 43 44 struct aria_avx2_request_ctx { 45 u8 keystream[ARIA_AESNI_AVX2_PARALLEL_BLOCK_SIZE]; 46 }; 47 48 static int ecb_do_encrypt(struct skcipher_request *req, const u32 *rkey) 49 { 50 ECB_WALK_START(req, ARIA_BLOCK_SIZE, ARIA_AESNI_PARALLEL_BLOCKS); 51 ECB_BLOCK(ARIA_AESNI_AVX2_PARALLEL_BLOCKS, aria_ops.aria_encrypt_32way); 52 ECB_BLOCK(ARIA_AESNI_PARALLEL_BLOCKS, aria_ops.aria_encrypt_16way); 53 ECB_BLOCK(1, aria_encrypt); 54 ECB_WALK_END(); 55 } 56 57 static int ecb_do_decrypt(struct skcipher_request *req, const u32 *rkey) 58 { 59 ECB_WALK_START(req, ARIA_BLOCK_SIZE, ARIA_AESNI_PARALLEL_BLOCKS); 60 ECB_BLOCK(ARIA_AESNI_AVX2_PARALLEL_BLOCKS, aria_ops.aria_decrypt_32way); 61 ECB_BLOCK(ARIA_AESNI_PARALLEL_BLOCKS, aria_ops.aria_decrypt_16way); 62 ECB_BLOCK(1, aria_decrypt); 63 ECB_WALK_END(); 64 } 65 66 static int aria_avx2_ecb_encrypt(struct skcipher_request *req) 67 { 68 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 69 struct aria_ctx *ctx = crypto_skcipher_ctx(tfm); 70 71 return ecb_do_encrypt(req, ctx->enc_key[0]); 72 } 73 74 static int aria_avx2_ecb_decrypt(struct skcipher_request *req) 75 { 76 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 77 struct aria_ctx *ctx = crypto_skcipher_ctx(tfm); 78 79 return ecb_do_decrypt(req, ctx->dec_key[0]); 80 } 81 82 static int aria_avx2_set_key(struct crypto_skcipher *tfm, const u8 *key, 83 unsigned int keylen) 84 { 85 return aria_set_key(&tfm->base, key, keylen); 86 } 87 88 static int aria_avx2_ctr_encrypt(struct skcipher_request *req) 89 { 90 struct aria_avx2_request_ctx *req_ctx = skcipher_request_ctx(req); 91 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 92 struct aria_ctx *ctx = crypto_skcipher_ctx(tfm); 93 struct skcipher_walk walk; 94 unsigned int nbytes; 95 int err; 96 97 err = skcipher_walk_virt(&walk, req, false); 98 99 while ((nbytes = walk.nbytes) > 0) { 100 const u8 *src = walk.src.virt.addr; 101 u8 *dst = walk.dst.virt.addr; 102 103 while (nbytes >= ARIA_AESNI_AVX2_PARALLEL_BLOCK_SIZE) { 104 kernel_fpu_begin(); 105 aria_ops.aria_ctr_crypt_32way(ctx, dst, src, 106 &req_ctx->keystream[0], 107 walk.iv); 108 kernel_fpu_end(); 109 dst += ARIA_AESNI_AVX2_PARALLEL_BLOCK_SIZE; 110 src += ARIA_AESNI_AVX2_PARALLEL_BLOCK_SIZE; 111 nbytes -= ARIA_AESNI_AVX2_PARALLEL_BLOCK_SIZE; 112 } 113 114 while (nbytes >= ARIA_AESNI_PARALLEL_BLOCK_SIZE) { 115 kernel_fpu_begin(); 116 aria_ops.aria_ctr_crypt_16way(ctx, dst, src, 117 &req_ctx->keystream[0], 118 walk.iv); 119 kernel_fpu_end(); 120 dst += ARIA_AESNI_PARALLEL_BLOCK_SIZE; 121 src += ARIA_AESNI_PARALLEL_BLOCK_SIZE; 122 nbytes -= ARIA_AESNI_PARALLEL_BLOCK_SIZE; 123 } 124 125 while (nbytes >= ARIA_BLOCK_SIZE) { 126 memcpy(&req_ctx->keystream[0], walk.iv, ARIA_BLOCK_SIZE); 127 crypto_inc(walk.iv, ARIA_BLOCK_SIZE); 128 129 aria_encrypt(ctx, &req_ctx->keystream[0], 130 &req_ctx->keystream[0]); 131 132 crypto_xor_cpy(dst, src, &req_ctx->keystream[0], 133 ARIA_BLOCK_SIZE); 134 dst += ARIA_BLOCK_SIZE; 135 src += ARIA_BLOCK_SIZE; 136 nbytes -= ARIA_BLOCK_SIZE; 137 } 138 139 if (walk.nbytes == walk.total && nbytes > 0) { 140 memcpy(&req_ctx->keystream[0], walk.iv, 141 ARIA_BLOCK_SIZE); 142 crypto_inc(walk.iv, ARIA_BLOCK_SIZE); 143 144 aria_encrypt(ctx, &req_ctx->keystream[0], 145 &req_ctx->keystream[0]); 146 147 crypto_xor_cpy(dst, src, &req_ctx->keystream[0], 148 nbytes); 149 dst += nbytes; 150 src += nbytes; 151 nbytes = 0; 152 } 153 err = skcipher_walk_done(&walk, nbytes); 154 } 155 156 return err; 157 } 158 159 static int aria_avx2_init_tfm(struct crypto_skcipher *tfm) 160 { 161 crypto_skcipher_set_reqsize(tfm, sizeof(struct aria_avx2_request_ctx)); 162 163 return 0; 164 } 165 166 static struct skcipher_alg aria_algs[] = { 167 { 168 .base.cra_name = "__ecb(aria)", 169 .base.cra_driver_name = "__ecb-aria-avx2", 170 .base.cra_priority = 500, 171 .base.cra_flags = CRYPTO_ALG_INTERNAL, 172 .base.cra_blocksize = ARIA_BLOCK_SIZE, 173 .base.cra_ctxsize = sizeof(struct aria_ctx), 174 .base.cra_module = THIS_MODULE, 175 .min_keysize = ARIA_MIN_KEY_SIZE, 176 .max_keysize = ARIA_MAX_KEY_SIZE, 177 .setkey = aria_avx2_set_key, 178 .encrypt = aria_avx2_ecb_encrypt, 179 .decrypt = aria_avx2_ecb_decrypt, 180 }, { 181 .base.cra_name = "__ctr(aria)", 182 .base.cra_driver_name = "__ctr-aria-avx2", 183 .base.cra_priority = 500, 184 .base.cra_flags = CRYPTO_ALG_INTERNAL | 185 CRYPTO_ALG_SKCIPHER_REQSIZE_LARGE, 186 .base.cra_blocksize = 1, 187 .base.cra_ctxsize = sizeof(struct aria_ctx), 188 .base.cra_module = THIS_MODULE, 189 .min_keysize = ARIA_MIN_KEY_SIZE, 190 .max_keysize = ARIA_MAX_KEY_SIZE, 191 .ivsize = ARIA_BLOCK_SIZE, 192 .chunksize = ARIA_BLOCK_SIZE, 193 .setkey = aria_avx2_set_key, 194 .encrypt = aria_avx2_ctr_encrypt, 195 .decrypt = aria_avx2_ctr_encrypt, 196 .init = aria_avx2_init_tfm, 197 } 198 }; 199 200 static struct simd_skcipher_alg *aria_simd_algs[ARRAY_SIZE(aria_algs)]; 201 202 static int __init aria_avx2_init(void) 203 { 204 const char *feature_name; 205 206 if (!boot_cpu_has(X86_FEATURE_AVX) || 207 !boot_cpu_has(X86_FEATURE_AVX2) || 208 !boot_cpu_has(X86_FEATURE_AES) || 209 !boot_cpu_has(X86_FEATURE_OSXSAVE)) { 210 pr_info("AVX2 or AES-NI instructions are not detected.\n"); 211 return -ENODEV; 212 } 213 214 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, 215 &feature_name)) { 216 pr_info("CPU feature '%s' is not supported.\n", feature_name); 217 return -ENODEV; 218 } 219 220 if (boot_cpu_has(X86_FEATURE_GFNI) && IS_ENABLED(CONFIG_AS_GFNI)) { 221 aria_ops.aria_encrypt_16way = aria_aesni_avx_gfni_encrypt_16way; 222 aria_ops.aria_decrypt_16way = aria_aesni_avx_gfni_decrypt_16way; 223 aria_ops.aria_ctr_crypt_16way = aria_aesni_avx_gfni_ctr_crypt_16way; 224 aria_ops.aria_encrypt_32way = aria_aesni_avx2_gfni_encrypt_32way; 225 aria_ops.aria_decrypt_32way = aria_aesni_avx2_gfni_decrypt_32way; 226 aria_ops.aria_ctr_crypt_32way = aria_aesni_avx2_gfni_ctr_crypt_32way; 227 } else { 228 aria_ops.aria_encrypt_16way = aria_aesni_avx_encrypt_16way; 229 aria_ops.aria_decrypt_16way = aria_aesni_avx_decrypt_16way; 230 aria_ops.aria_ctr_crypt_16way = aria_aesni_avx_ctr_crypt_16way; 231 aria_ops.aria_encrypt_32way = aria_aesni_avx2_encrypt_32way; 232 aria_ops.aria_decrypt_32way = aria_aesni_avx2_decrypt_32way; 233 aria_ops.aria_ctr_crypt_32way = aria_aesni_avx2_ctr_crypt_32way; 234 } 235 236 return simd_register_skciphers_compat(aria_algs, 237 ARRAY_SIZE(aria_algs), 238 aria_simd_algs); 239 } 240 241 static void __exit aria_avx2_exit(void) 242 { 243 simd_unregister_skciphers(aria_algs, ARRAY_SIZE(aria_algs), 244 aria_simd_algs); 245 } 246 247 module_init(aria_avx2_init); 248 module_exit(aria_avx2_exit); 249 250 MODULE_LICENSE("GPL"); 251 MODULE_AUTHOR("Taehee Yoo <ap420073@gmail.com>"); 252 MODULE_DESCRIPTION("ARIA Cipher Algorithm, AVX2/AES-NI/GFNI optimized"); 253 MODULE_ALIAS_CRYPTO("aria"); 254 MODULE_ALIAS_CRYPTO("aria-aesni-avx2"); 255