1 /* 2 * sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions 3 * 4 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <asm/neon.h> 12 #include <asm/simd.h> 13 #include <asm/unaligned.h> 14 #include <crypto/internal/hash.h> 15 #include <crypto/internal/simd.h> 16 #include <crypto/sm3.h> 17 #include <crypto/sm3_base.h> 18 #include <linux/cpufeature.h> 19 #include <linux/crypto.h> 20 #include <linux/module.h> 21 22 MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions"); 23 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); 24 MODULE_LICENSE("GPL v2"); 25 26 asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src, 27 int blocks); 28 29 static int sm3_ce_update(struct shash_desc *desc, const u8 *data, 30 unsigned int len) 31 { 32 if (!crypto_simd_usable()) 33 return crypto_sm3_update(desc, data, len); 34 35 kernel_neon_begin(); 36 sm3_base_do_update(desc, data, len, sm3_ce_transform); 37 kernel_neon_end(); 38 39 return 0; 40 } 41 42 static int sm3_ce_final(struct shash_desc *desc, u8 *out) 43 { 44 if (!crypto_simd_usable()) 45 return crypto_sm3_finup(desc, NULL, 0, out); 46 47 kernel_neon_begin(); 48 sm3_base_do_finalize(desc, sm3_ce_transform); 49 kernel_neon_end(); 50 51 return sm3_base_finish(desc, out); 52 } 53 54 static int sm3_ce_finup(struct shash_desc *desc, const u8 *data, 55 unsigned int len, u8 *out) 56 { 57 if (!crypto_simd_usable()) 58 return crypto_sm3_finup(desc, data, len, out); 59 60 kernel_neon_begin(); 61 sm3_base_do_update(desc, data, len, sm3_ce_transform); 62 kernel_neon_end(); 63 64 return sm3_ce_final(desc, out); 65 } 66 67 static struct shash_alg sm3_alg = { 68 .digestsize = SM3_DIGEST_SIZE, 69 .init = sm3_base_init, 70 .update = sm3_ce_update, 71 .final = sm3_ce_final, 72 .finup = sm3_ce_finup, 73 .descsize = sizeof(struct sm3_state), 74 .base.cra_name = "sm3", 75 .base.cra_driver_name = "sm3-ce", 76 .base.cra_blocksize = SM3_BLOCK_SIZE, 77 .base.cra_module = THIS_MODULE, 78 .base.cra_priority = 200, 79 }; 80 81 static int __init sm3_ce_mod_init(void) 82 { 83 return crypto_register_shash(&sm3_alg); 84 } 85 86 static void __exit sm3_ce_mod_fini(void) 87 { 88 crypto_unregister_shash(&sm3_alg); 89 } 90 91 module_cpu_feature_match(SM3, sm3_ce_mod_init); 92 module_exit(sm3_ce_mod_fini); 93