1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * SM4 Cipher Algorithm, AES-NI/AVX2 optimized. 4 * as specified in 5 * https://tools.ietf.org/id/draft-ribose-cfrg-sm4-10.html 6 * 7 * Copyright (c) 2021, Alibaba Group. 8 * Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com> 9 */ 10 11 #include <linux/module.h> 12 #include <linux/crypto.h> 13 #include <linux/kernel.h> 14 #include <asm/simd.h> 15 #include <crypto/internal/simd.h> 16 #include <crypto/internal/skcipher.h> 17 #include <crypto/sm4.h> 18 #include "sm4-avx.h" 19 20 #define SM4_CRYPT16_BLOCK_SIZE (SM4_BLOCK_SIZE * 16) 21 22 asmlinkage void sm4_aesni_avx2_ctr_enc_blk16(const u32 *rk, u8 *dst, 23 const u8 *src, u8 *iv); 24 asmlinkage void sm4_aesni_avx2_cbc_dec_blk16(const u32 *rk, u8 *dst, 25 const u8 *src, u8 *iv); 26 27 static int sm4_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key, 28 unsigned int key_len) 29 { 30 struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm); 31 32 return sm4_expandkey(ctx, key, key_len); 33 } 34 35 static int cbc_decrypt(struct skcipher_request *req) 36 { 37 return sm4_avx_cbc_decrypt(req, SM4_CRYPT16_BLOCK_SIZE, 38 sm4_aesni_avx2_cbc_dec_blk16); 39 } 40 41 42 static int ctr_crypt(struct skcipher_request *req) 43 { 44 return sm4_avx_ctr_crypt(req, SM4_CRYPT16_BLOCK_SIZE, 45 sm4_aesni_avx2_ctr_enc_blk16); 46 } 47 48 static struct skcipher_alg sm4_aesni_avx2_skciphers[] = { 49 { 50 .base = { 51 .cra_name = "__ecb(sm4)", 52 .cra_driver_name = "__ecb-sm4-aesni-avx2", 53 .cra_priority = 500, 54 .cra_flags = CRYPTO_ALG_INTERNAL, 55 .cra_blocksize = SM4_BLOCK_SIZE, 56 .cra_ctxsize = sizeof(struct sm4_ctx), 57 .cra_module = THIS_MODULE, 58 }, 59 .min_keysize = SM4_KEY_SIZE, 60 .max_keysize = SM4_KEY_SIZE, 61 .walksize = 16 * SM4_BLOCK_SIZE, 62 .setkey = sm4_skcipher_setkey, 63 .encrypt = sm4_avx_ecb_encrypt, 64 .decrypt = sm4_avx_ecb_decrypt, 65 }, { 66 .base = { 67 .cra_name = "__cbc(sm4)", 68 .cra_driver_name = "__cbc-sm4-aesni-avx2", 69 .cra_priority = 500, 70 .cra_flags = CRYPTO_ALG_INTERNAL, 71 .cra_blocksize = SM4_BLOCK_SIZE, 72 .cra_ctxsize = sizeof(struct sm4_ctx), 73 .cra_module = THIS_MODULE, 74 }, 75 .min_keysize = SM4_KEY_SIZE, 76 .max_keysize = SM4_KEY_SIZE, 77 .ivsize = SM4_BLOCK_SIZE, 78 .walksize = 16 * SM4_BLOCK_SIZE, 79 .setkey = sm4_skcipher_setkey, 80 .encrypt = sm4_cbc_encrypt, 81 .decrypt = cbc_decrypt, 82 }, { 83 .base = { 84 .cra_name = "__ctr(sm4)", 85 .cra_driver_name = "__ctr-sm4-aesni-avx2", 86 .cra_priority = 500, 87 .cra_flags = CRYPTO_ALG_INTERNAL, 88 .cra_blocksize = 1, 89 .cra_ctxsize = sizeof(struct sm4_ctx), 90 .cra_module = THIS_MODULE, 91 }, 92 .min_keysize = SM4_KEY_SIZE, 93 .max_keysize = SM4_KEY_SIZE, 94 .ivsize = SM4_BLOCK_SIZE, 95 .chunksize = SM4_BLOCK_SIZE, 96 .walksize = 16 * SM4_BLOCK_SIZE, 97 .setkey = sm4_skcipher_setkey, 98 .encrypt = ctr_crypt, 99 .decrypt = ctr_crypt, 100 } 101 }; 102 103 static struct simd_skcipher_alg * 104 simd_sm4_aesni_avx2_skciphers[ARRAY_SIZE(sm4_aesni_avx2_skciphers)]; 105 106 static int __init sm4_init(void) 107 { 108 const char *feature_name; 109 110 if (!boot_cpu_has(X86_FEATURE_AVX) || 111 !boot_cpu_has(X86_FEATURE_AVX2) || 112 !boot_cpu_has(X86_FEATURE_AES) || 113 !boot_cpu_has(X86_FEATURE_OSXSAVE)) { 114 pr_info("AVX2 or AES-NI instructions are not detected.\n"); 115 return -ENODEV; 116 } 117 118 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, 119 &feature_name)) { 120 pr_info("CPU feature '%s' is not supported.\n", feature_name); 121 return -ENODEV; 122 } 123 124 return simd_register_skciphers_compat(sm4_aesni_avx2_skciphers, 125 ARRAY_SIZE(sm4_aesni_avx2_skciphers), 126 simd_sm4_aesni_avx2_skciphers); 127 } 128 129 static void __exit sm4_exit(void) 130 { 131 simd_unregister_skciphers(sm4_aesni_avx2_skciphers, 132 ARRAY_SIZE(sm4_aesni_avx2_skciphers), 133 simd_sm4_aesni_avx2_skciphers); 134 } 135 136 module_init(sm4_init); 137 module_exit(sm4_exit); 138 139 MODULE_LICENSE("GPL v2"); 140 MODULE_AUTHOR("Tianjia Zhang <tianjia.zhang@linux.alibaba.com>"); 141 MODULE_DESCRIPTION("SM4 Cipher Algorithm, AES-NI/AVX2 optimized"); 142 MODULE_ALIAS_CRYPTO("sm4"); 143 MODULE_ALIAS_CRYPTO("sm4-aesni-avx2"); 144