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 int sha512_ce_update(struct shash_desc *desc, const u8 *data, 33 unsigned int len) 34 { 35 if (!crypto_simd_usable()) 36 return sha512_base_do_update(desc, data, len, 37 (sha512_block_fn *)sha512_block_data_order); 38 39 kernel_neon_begin(); 40 sha512_base_do_update(desc, data, len, 41 (sha512_block_fn *)sha512_ce_transform); 42 kernel_neon_end(); 43 44 return 0; 45 } 46 47 static int sha512_ce_finup(struct shash_desc *desc, const u8 *data, 48 unsigned int len, u8 *out) 49 { 50 if (!crypto_simd_usable()) { 51 if (len) 52 sha512_base_do_update(desc, data, len, 53 (sha512_block_fn *)sha512_block_data_order); 54 sha512_base_do_finalize(desc, 55 (sha512_block_fn *)sha512_block_data_order); 56 return sha512_base_finish(desc, out); 57 } 58 59 kernel_neon_begin(); 60 sha512_base_do_update(desc, data, len, 61 (sha512_block_fn *)sha512_ce_transform); 62 sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform); 63 kernel_neon_end(); 64 return sha512_base_finish(desc, out); 65 } 66 67 static int sha512_ce_final(struct shash_desc *desc, u8 *out) 68 { 69 if (!crypto_simd_usable()) { 70 sha512_base_do_finalize(desc, 71 (sha512_block_fn *)sha512_block_data_order); 72 return sha512_base_finish(desc, out); 73 } 74 75 kernel_neon_begin(); 76 sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform); 77 kernel_neon_end(); 78 return sha512_base_finish(desc, out); 79 } 80 81 static struct shash_alg algs[] = { { 82 .init = sha384_base_init, 83 .update = sha512_ce_update, 84 .final = sha512_ce_final, 85 .finup = sha512_ce_finup, 86 .descsize = sizeof(struct sha512_state), 87 .digestsize = SHA384_DIGEST_SIZE, 88 .base.cra_name = "sha384", 89 .base.cra_driver_name = "sha384-ce", 90 .base.cra_priority = 200, 91 .base.cra_blocksize = SHA512_BLOCK_SIZE, 92 .base.cra_module = THIS_MODULE, 93 }, { 94 .init = sha512_base_init, 95 .update = sha512_ce_update, 96 .final = sha512_ce_final, 97 .finup = sha512_ce_finup, 98 .descsize = sizeof(struct sha512_state), 99 .digestsize = SHA512_DIGEST_SIZE, 100 .base.cra_name = "sha512", 101 .base.cra_driver_name = "sha512-ce", 102 .base.cra_priority = 200, 103 .base.cra_blocksize = SHA512_BLOCK_SIZE, 104 .base.cra_module = THIS_MODULE, 105 } }; 106 107 static int __init sha512_ce_mod_init(void) 108 { 109 return crypto_register_shashes(algs, ARRAY_SIZE(algs)); 110 } 111 112 static void __exit sha512_ce_mod_fini(void) 113 { 114 crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); 115 } 116 117 module_cpu_feature_match(SHA512, sha512_ce_mod_init); 118 module_exit(sha512_ce_mod_fini); 119