1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * sha512-ce-glue.c - SHA-384/SHA-512 using ARMv8 Crypto Extensions 4 * 5 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #include <asm/neon.h> 13 #include <asm/simd.h> 14 #include <asm/unaligned.h> 15 #include <crypto/internal/hash.h> 16 #include <crypto/internal/simd.h> 17 #include <crypto/sha.h> 18 #include <crypto/sha512_base.h> 19 #include <linux/cpufeature.h> 20 #include <linux/crypto.h> 21 #include <linux/module.h> 22 23 MODULE_DESCRIPTION("SHA-384/SHA-512 secure hash using ARMv8 Crypto Extensions"); 24 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); 25 MODULE_LICENSE("GPL v2"); 26 27 asmlinkage void sha512_ce_transform(struct sha512_state *sst, u8 const *src, 28 int blocks); 29 30 asmlinkage void sha512_block_data_order(u64 *digest, u8 const *src, int blocks); 31 32 static void __sha512_block_data_order(struct sha512_state *sst, u8 const *src, 33 int blocks) 34 { 35 sha512_block_data_order(sst->state, src, blocks); 36 } 37 38 static int sha512_ce_update(struct shash_desc *desc, const u8 *data, 39 unsigned int len) 40 { 41 if (!crypto_simd_usable()) 42 return sha512_base_do_update(desc, data, len, 43 __sha512_block_data_order); 44 45 kernel_neon_begin(); 46 sha512_base_do_update(desc, data, len, sha512_ce_transform); 47 kernel_neon_end(); 48 49 return 0; 50 } 51 52 static int sha512_ce_finup(struct shash_desc *desc, const u8 *data, 53 unsigned int len, u8 *out) 54 { 55 if (!crypto_simd_usable()) { 56 if (len) 57 sha512_base_do_update(desc, data, len, 58 __sha512_block_data_order); 59 sha512_base_do_finalize(desc, __sha512_block_data_order); 60 return sha512_base_finish(desc, out); 61 } 62 63 kernel_neon_begin(); 64 sha512_base_do_update(desc, data, len, sha512_ce_transform); 65 sha512_base_do_finalize(desc, sha512_ce_transform); 66 kernel_neon_end(); 67 return sha512_base_finish(desc, out); 68 } 69 70 static int sha512_ce_final(struct shash_desc *desc, u8 *out) 71 { 72 if (!crypto_simd_usable()) { 73 sha512_base_do_finalize(desc, __sha512_block_data_order); 74 return sha512_base_finish(desc, out); 75 } 76 77 kernel_neon_begin(); 78 sha512_base_do_finalize(desc, sha512_ce_transform); 79 kernel_neon_end(); 80 return sha512_base_finish(desc, out); 81 } 82 83 static struct shash_alg algs[] = { { 84 .init = sha384_base_init, 85 .update = sha512_ce_update, 86 .final = sha512_ce_final, 87 .finup = sha512_ce_finup, 88 .descsize = sizeof(struct sha512_state), 89 .digestsize = SHA384_DIGEST_SIZE, 90 .base.cra_name = "sha384", 91 .base.cra_driver_name = "sha384-ce", 92 .base.cra_priority = 200, 93 .base.cra_blocksize = SHA512_BLOCK_SIZE, 94 .base.cra_module = THIS_MODULE, 95 }, { 96 .init = sha512_base_init, 97 .update = sha512_ce_update, 98 .final = sha512_ce_final, 99 .finup = sha512_ce_finup, 100 .descsize = sizeof(struct sha512_state), 101 .digestsize = SHA512_DIGEST_SIZE, 102 .base.cra_name = "sha512", 103 .base.cra_driver_name = "sha512-ce", 104 .base.cra_priority = 200, 105 .base.cra_blocksize = SHA512_BLOCK_SIZE, 106 .base.cra_module = THIS_MODULE, 107 } }; 108 109 static int __init sha512_ce_mod_init(void) 110 { 111 return crypto_register_shashes(algs, ARRAY_SIZE(algs)); 112 } 113 114 static void __exit sha512_ce_mod_fini(void) 115 { 116 crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); 117 } 118 119 module_cpu_feature_match(SHA512, sha512_ce_mod_init); 120 module_exit(sha512_ce_mod_fini); 121