blob: 6877cbb9105fbb24cb0a65f441f0c9f272a22733
| 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * SHA1 Secure Hash Algorithm. |
| 5 | * |
| 6 | * Derived from cryptoapi implementation, adapted for in-place |
| 7 | * scatterlist interface. |
| 8 | * |
| 9 | * Copyright (c) Alan Smithee. |
| 10 | * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> |
| 11 | * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify it |
| 14 | * under the terms of the GNU General Public License as published by the Free |
| 15 | * Software Foundation; either version 2 of the License, or (at your option) |
| 16 | * any later version. |
| 17 | * |
| 18 | */ |
| 19 | #include <crypto/internal/hash.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/mm.h> |
| 23 | #include <linux/cryptohash.h> |
| 24 | #include <linux/types.h> |
| 25 | #include <crypto/sha.h> |
| 26 | #include <crypto/sha1_base.h> |
| 27 | #include <asm/byteorder.h> |
| 28 | |
| 29 | const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE] = { |
| 30 | 0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d, |
| 31 | 0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90, |
| 32 | 0xaf, 0xd8, 0x07, 0x09 |
| 33 | }; |
| 34 | EXPORT_SYMBOL_GPL(sha1_zero_message_hash); |
| 35 | |
| 36 | static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src, |
| 37 | int blocks) |
| 38 | { |
| 39 | u32 temp[SHA_WORKSPACE_WORDS]; |
| 40 | |
| 41 | while (blocks--) { |
| 42 | sha_transform(sst->state, src, temp); |
| 43 | src += SHA1_BLOCK_SIZE; |
| 44 | } |
| 45 | memzero_explicit(temp, sizeof(temp)); |
| 46 | } |
| 47 | |
| 48 | int crypto_sha1_update(struct shash_desc *desc, const u8 *data, |
| 49 | unsigned int len) |
| 50 | { |
| 51 | return sha1_base_do_update(desc, data, len, sha1_generic_block_fn); |
| 52 | } |
| 53 | EXPORT_SYMBOL(crypto_sha1_update); |
| 54 | |
| 55 | static int sha1_final(struct shash_desc *desc, u8 *out) |
| 56 | { |
| 57 | sha1_base_do_finalize(desc, sha1_generic_block_fn); |
| 58 | return sha1_base_finish(desc, out); |
| 59 | } |
| 60 | |
| 61 | int crypto_sha1_finup(struct shash_desc *desc, const u8 *data, |
| 62 | unsigned int len, u8 *out) |
| 63 | { |
| 64 | sha1_base_do_update(desc, data, len, sha1_generic_block_fn); |
| 65 | return sha1_final(desc, out); |
| 66 | } |
| 67 | EXPORT_SYMBOL(crypto_sha1_finup); |
| 68 | |
| 69 | static struct shash_alg alg = { |
| 70 | .digestsize = SHA1_DIGEST_SIZE, |
| 71 | .init = sha1_base_init, |
| 72 | .update = crypto_sha1_update, |
| 73 | .final = sha1_final, |
| 74 | .finup = crypto_sha1_finup, |
| 75 | .descsize = sizeof(struct sha1_state), |
| 76 | .base = { |
| 77 | .cra_name = "sha1", |
| 78 | .cra_driver_name= "sha1-generic", |
| 79 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| 80 | .cra_blocksize = SHA1_BLOCK_SIZE, |
| 81 | .cra_module = THIS_MODULE, |
| 82 | } |
| 83 | }; |
| 84 | |
| 85 | static int __init sha1_generic_mod_init(void) |
| 86 | { |
| 87 | return crypto_register_shash(&alg); |
| 88 | } |
| 89 | |
| 90 | static void __exit sha1_generic_mod_fini(void) |
| 91 | { |
| 92 | crypto_unregister_shash(&alg); |
| 93 | } |
| 94 | |
| 95 | module_init(sha1_generic_mod_init); |
| 96 | module_exit(sha1_generic_mod_fini); |
| 97 | |
| 98 | MODULE_LICENSE("GPL"); |
| 99 | MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm"); |
| 100 | |
| 101 | MODULE_ALIAS_CRYPTO("sha1"); |
| 102 | MODULE_ALIAS_CRYPTO("sha1-generic"); |
| 103 |