projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| bb6c8c46 AB |
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, | |
| bb6c8c46 AB |
90 | .base.cra_blocksize = SHA512_BLOCK_SIZE, |
| 91 | .base.cra_module = THIS_MODULE, | |
| 92 | }, { | |
| 93 | .init = sha512_base_init, | |
| 94 | .update = sha512_ce_update, | |
| 95 | .final = sha512_ce_final, | |
| 96 | .finup = sha512_ce_finup, | |
| 97 | .descsize = sizeof(struct sha512_state), | |
| 98 | .digestsize = SHA512_DIGEST_SIZE, | |
| 99 | .base.cra_name = "sha512", | |
| 100 | .base.cra_driver_name = "sha512-ce", | |
| 101 | .base.cra_priority = 200, | |
| bb6c8c46 AB |
102 | .base.cra_blocksize = SHA512_BLOCK_SIZE, |
| 103 | .base.cra_module = THIS_MODULE, | |
| 104 | } }; | |
| 105 | ||
| 106 | static int __init sha512_ce_mod_init(void) | |
| 107 | { | |
| 108 | return crypto_register_shashes(algs, ARRAY_SIZE(algs)); | |
| 109 | } | |
| 110 | ||
| 111 | static void __exit sha512_ce_mod_fini(void) | |
| 112 | { | |
| 113 | crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); | |
| 114 | } | |
| 115 | ||
| 116 | module_cpu_feature_match(SHA512, sha512_ce_mod_init); | |
| 117 | module_exit(sha512_ce_mod_fini); |