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/sm3.h> 16 #include <crypto/sm3_base.h> 17 #include <linux/cpufeature.h> 18 #include <linux/crypto.h> 19 #include <linux/module.h> 20 21 MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions"); 22 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); 23 MODULE_LICENSE("GPL v2"); 24 25 asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src, 26 int blocks); 27 28 static int sm3_ce_update(struct shash_desc *desc, const u8 *data, 29 unsigned int len) 30 { 31 if (!may_use_simd()) 32 return crypto_sm3_update(desc, data, len); 33 34 kernel_neon_begin(); 35 sm3_base_do_update(desc, data, len, sm3_ce_transform); 36 kernel_neon_end(); 37 38 return 0; 39 } 40 41 static int sm3_ce_final(struct shash_desc *desc, u8 *out) 42 { 43 if (!may_use_simd()) 44 return crypto_sm3_finup(desc, NULL, 0, out); 45 46 kernel_neon_begin(); 47 sm3_base_do_finalize(desc, sm3_ce_transform); 48 kernel_neon_end(); 49 50 return sm3_base_finish(desc, out); 51 } 52 53 static int sm3_ce_finup(struct shash_desc *desc, const u8 *data, 54 unsigned int len, u8 *out) 55 { 56 if (!may_use_simd()) 57 return crypto_sm3_finup(desc, data, len, out); 58 59 kernel_neon_begin(); 60 sm3_base_do_update(desc, data, len, sm3_ce_transform); 61 kernel_neon_end(); 62 63 return sm3_ce_final(desc, out); 64 } 65 66 static struct shash_alg sm3_alg = { 67 .digestsize = SM3_DIGEST_SIZE, 68 .init = sm3_base_init, 69 .update = sm3_ce_update, 70 .final = sm3_ce_final, 71 .finup = sm3_ce_finup, 72 .descsize = sizeof(struct sm3_state), 73 .base.cra_name = "sm3", 74 .base.cra_driver_name = "sm3-ce", 75 .base.cra_blocksize = SM3_BLOCK_SIZE, 76 .base.cra_module = THIS_MODULE, 77 .base.cra_priority = 200, 78 }; 79 80 static int __init sm3_ce_mod_init(void) 81 { 82 return crypto_register_shash(&sm3_alg); 83 } 84 85 static void __exit sm3_ce_mod_fini(void) 86 { 87 crypto_unregister_shash(&sm3_alg); 88 } 89 90 module_cpu_feature_match(SM3, sm3_ce_mod_init); 91 module_exit(sm3_ce_mod_fini); 92