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/sha.h> 17 #include <crypto/sha512_base.h> 18 #include <linux/cpufeature.h> 19 #include <linux/crypto.h> 20 #include <linux/module.h> 21 22 MODULE_DESCRIPTION("SHA-384/SHA-512 secure hash using ARMv8 Crypto Extensions"); 23 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); 24 MODULE_LICENSE("GPL v2"); 25 26 asmlinkage void sha512_ce_transform(struct sha512_state *sst, u8 const *src, 27 int blocks); 28 29 asmlinkage void sha512_block_data_order(u64 *digest, u8 const *src, int blocks); 30 31 static int sha512_ce_update(struct shash_desc *desc, const u8 *data, 32 unsigned int len) 33 { 34 if (!may_use_simd()) 35 return sha512_base_do_update(desc, data, len, 36 (sha512_block_fn *)sha512_block_data_order); 37 38 kernel_neon_begin(); 39 sha512_base_do_update(desc, data, len, 40 (sha512_block_fn *)sha512_ce_transform); 41 kernel_neon_end(); 42 43 return 0; 44 } 45 46 static int sha512_ce_finup(struct shash_desc *desc, const u8 *data, 47 unsigned int len, u8 *out) 48 { 49 if (!may_use_simd()) { 50 if (len) 51 sha512_base_do_update(desc, data, len, 52 (sha512_block_fn *)sha512_block_data_order); 53 sha512_base_do_finalize(desc, 54 (sha512_block_fn *)sha512_block_data_order); 55 return sha512_base_finish(desc, out); 56 } 57 58 kernel_neon_begin(); 59 sha512_base_do_update(desc, data, len, 60 (sha512_block_fn *)sha512_ce_transform); 61 sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform); 62 kernel_neon_end(); 63 return sha512_base_finish(desc, out); 64 } 65 66 static int sha512_ce_final(struct shash_desc *desc, u8 *out) 67 { 68 if (!may_use_simd()) { 69 sha512_base_do_finalize(desc, 70 (sha512_block_fn *)sha512_block_data_order); 71 return sha512_base_finish(desc, out); 72 } 73 74 kernel_neon_begin(); 75 sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform); 76 kernel_neon_end(); 77 return sha512_base_finish(desc, out); 78 } 79 80 static struct shash_alg algs[] = { { 81 .init = sha384_base_init, 82 .update = sha512_ce_update, 83 .final = sha512_ce_final, 84 .finup = sha512_ce_finup, 85 .descsize = sizeof(struct sha512_state), 86 .digestsize = SHA384_DIGEST_SIZE, 87 .base.cra_name = "sha384", 88 .base.cra_driver_name = "sha384-ce", 89 .base.cra_priority = 200, 90 .base.cra_flags = CRYPTO_ALG_TYPE_SHASH, 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_flags = CRYPTO_ALG_TYPE_SHASH, 104 .base.cra_blocksize = SHA512_BLOCK_SIZE, 105 .base.cra_module = THIS_MODULE, 106 } }; 107 108 static int __init sha512_ce_mod_init(void) 109 { 110 return crypto_register_shashes(algs, ARRAY_SIZE(algs)); 111 } 112 113 static void __exit sha512_ce_mod_fini(void) 114 { 115 crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); 116 } 117 118 module_cpu_feature_match(SHA512, sha512_ce_mod_init); 119 module_exit(sha512_ce_mod_fini); 120