1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions 4 * 5 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org> 6 */ 7 8 #include <asm/neon.h> 9 #include <asm/simd.h> 10 #include <asm/unaligned.h> 11 #include <crypto/internal/hash.h> 12 #include <crypto/internal/simd.h> 13 #include <crypto/sm3.h> 14 #include <crypto/sm3_base.h> 15 #include <linux/cpufeature.h> 16 #include <linux/crypto.h> 17 #include <linux/module.h> 18 19 MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions"); 20 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); 21 MODULE_LICENSE("GPL v2"); 22 23 asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src, 24 int blocks); 25 26 static int sm3_ce_update(struct shash_desc *desc, const u8 *data, 27 unsigned int len) 28 { 29 if (!crypto_simd_usable()) 30 return crypto_sm3_update(desc, data, len); 31 32 kernel_neon_begin(); 33 sm3_base_do_update(desc, data, len, sm3_ce_transform); 34 kernel_neon_end(); 35 36 return 0; 37 } 38 39 static int sm3_ce_final(struct shash_desc *desc, u8 *out) 40 { 41 if (!crypto_simd_usable()) 42 return crypto_sm3_finup(desc, NULL, 0, out); 43 44 kernel_neon_begin(); 45 sm3_base_do_finalize(desc, sm3_ce_transform); 46 kernel_neon_end(); 47 48 return sm3_base_finish(desc, out); 49 } 50 51 static int sm3_ce_finup(struct shash_desc *desc, const u8 *data, 52 unsigned int len, u8 *out) 53 { 54 if (!crypto_simd_usable()) 55 return crypto_sm3_finup(desc, data, len, out); 56 57 kernel_neon_begin(); 58 sm3_base_do_update(desc, data, len, sm3_ce_transform); 59 kernel_neon_end(); 60 61 return sm3_ce_final(desc, out); 62 } 63 64 static struct shash_alg sm3_alg = { 65 .digestsize = SM3_DIGEST_SIZE, 66 .init = sm3_base_init, 67 .update = sm3_ce_update, 68 .final = sm3_ce_final, 69 .finup = sm3_ce_finup, 70 .descsize = sizeof(struct sm3_state), 71 .base.cra_name = "sm3", 72 .base.cra_driver_name = "sm3-ce", 73 .base.cra_blocksize = SM3_BLOCK_SIZE, 74 .base.cra_module = THIS_MODULE, 75 .base.cra_priority = 200, 76 }; 77 78 static int __init sm3_ce_mod_init(void) 79 { 80 return crypto_register_shash(&sm3_alg); 81 } 82 83 static void __exit sm3_ce_mod_fini(void) 84 { 85 crypto_unregister_shash(&sm3_alg); 86 } 87 88 module_cpu_feature_match(SM3, sm3_ce_mod_init); 89 module_exit(sm3_ce_mod_fini); 90