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 <linux/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 sm3_update(shash_desc_ctx(desc), data, len); 31 return 0; 32 } 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 (!crypto_simd_usable()) { 44 sm3_final(shash_desc_ctx(desc), out); 45 return 0; 46 } 47 48 kernel_neon_begin(); 49 sm3_base_do_finalize(desc, sm3_ce_transform); 50 kernel_neon_end(); 51 52 return sm3_base_finish(desc, out); 53 } 54 55 static int sm3_ce_finup(struct shash_desc *desc, const u8 *data, 56 unsigned int len, u8 *out) 57 { 58 if (!crypto_simd_usable()) { 59 struct sm3_state *sctx = shash_desc_ctx(desc); 60 61 if (len) 62 sm3_update(sctx, data, len); 63 sm3_final(sctx, out); 64 return 0; 65 } 66 67 kernel_neon_begin(); 68 if (len) 69 sm3_base_do_update(desc, data, len, sm3_ce_transform); 70 sm3_base_do_finalize(desc, sm3_ce_transform); 71 kernel_neon_end(); 72 73 return sm3_base_finish(desc, out); 74 } 75 76 static struct shash_alg sm3_alg = { 77 .digestsize = SM3_DIGEST_SIZE, 78 .init = sm3_base_init, 79 .update = sm3_ce_update, 80 .final = sm3_ce_final, 81 .finup = sm3_ce_finup, 82 .descsize = sizeof(struct sm3_state), 83 .base.cra_name = "sm3", 84 .base.cra_driver_name = "sm3-ce", 85 .base.cra_blocksize = SM3_BLOCK_SIZE, 86 .base.cra_module = THIS_MODULE, 87 .base.cra_priority = 400, 88 }; 89 90 static int __init sm3_ce_mod_init(void) 91 { 92 return crypto_register_shash(&sm3_alg); 93 } 94 95 static void __exit sm3_ce_mod_fini(void) 96 { 97 crypto_unregister_shash(&sm3_alg); 98 } 99 100 module_cpu_feature_match(SM3, sm3_ce_mod_init); 101 module_exit(sm3_ce_mod_fini); 102