Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Cryptographic API. | |
4 | * | |
5 | * SHA1 Secure Hash Algorithm. | |
6 | * | |
7 | * Derived from cryptoapi implementation, adapted for in-place | |
8 | * scatterlist interface. | |
9 | * | |
10 | * Copyright (c) Alan Smithee. | |
11 | * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> | |
12 | * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> | |
1da177e4 | 13 | */ |
54ccb367 | 14 | #include <crypto/internal/hash.h> |
1da177e4 LT |
15 | #include <linux/init.h> |
16 | #include <linux/module.h> | |
17 | #include <linux/mm.h> | |
1da177e4 | 18 | #include <linux/cryptohash.h> |
06ace7a9 | 19 | #include <linux/types.h> |
5265eeb2 | 20 | #include <crypto/sha.h> |
7c71f0f7 | 21 | #include <crypto/sha1_base.h> |
1da177e4 LT |
22 | #include <asm/byteorder.h> |
23 | ||
0c4c78de LC |
24 | const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE] = { |
25 | 0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d, | |
26 | 0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90, | |
27 | 0xaf, 0xd8, 0x07, 0x09 | |
28 | }; | |
29 | EXPORT_SYMBOL_GPL(sha1_zero_message_hash); | |
30 | ||
7c71f0f7 AB |
31 | static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src, |
32 | int blocks) | |
1da177e4 | 33 | { |
7c71f0f7 | 34 | u32 temp[SHA_WORKSPACE_WORDS]; |
54ccb367 | 35 | |
7c71f0f7 AB |
36 | while (blocks--) { |
37 | sha_transform(sst->state, src, temp); | |
38 | src += SHA1_BLOCK_SIZE; | |
39 | } | |
40 | memzero_explicit(temp, sizeof(temp)); | |
1da177e4 LT |
41 | } |
42 | ||
7c390170 | 43 | int crypto_sha1_update(struct shash_desc *desc, const u8 *data, |
7c71f0f7 | 44 | unsigned int len) |
1da177e4 | 45 | { |
7c71f0f7 | 46 | return sha1_base_do_update(desc, data, len, sha1_generic_block_fn); |
1da177e4 | 47 | } |
7c390170 | 48 | EXPORT_SYMBOL(crypto_sha1_update); |
1da177e4 | 49 | |
54ccb367 | 50 | static int sha1_final(struct shash_desc *desc, u8 *out) |
1da177e4 | 51 | { |
7c71f0f7 AB |
52 | sha1_base_do_finalize(desc, sha1_generic_block_fn); |
53 | return sha1_base_finish(desc, out); | |
1da177e4 LT |
54 | } |
55 | ||
7c71f0f7 AB |
56 | int crypto_sha1_finup(struct shash_desc *desc, const u8 *data, |
57 | unsigned int len, u8 *out) | |
e2a7ce4e | 58 | { |
7c71f0f7 AB |
59 | sha1_base_do_update(desc, data, len, sha1_generic_block_fn); |
60 | return sha1_final(desc, out); | |
e2a7ce4e | 61 | } |
7c71f0f7 | 62 | EXPORT_SYMBOL(crypto_sha1_finup); |
e2a7ce4e | 63 | |
54ccb367 AKR |
64 | static struct shash_alg alg = { |
65 | .digestsize = SHA1_DIGEST_SIZE, | |
7c71f0f7 | 66 | .init = sha1_base_init, |
7c390170 | 67 | .update = crypto_sha1_update, |
54ccb367 | 68 | .final = sha1_final, |
7c71f0f7 | 69 | .finup = crypto_sha1_finup, |
e2a7ce4e | 70 | .descsize = sizeof(struct sha1_state), |
54ccb367 AKR |
71 | .base = { |
72 | .cra_name = "sha1", | |
73 | .cra_driver_name= "sha1-generic", | |
90ef3e48 | 74 | .cra_priority = 100, |
54ccb367 AKR |
75 | .cra_blocksize = SHA1_BLOCK_SIZE, |
76 | .cra_module = THIS_MODULE, | |
77 | } | |
1da177e4 LT |
78 | }; |
79 | ||
3af5b90b | 80 | static int __init sha1_generic_mod_init(void) |
1da177e4 | 81 | { |
54ccb367 | 82 | return crypto_register_shash(&alg); |
1da177e4 LT |
83 | } |
84 | ||
3af5b90b | 85 | static void __exit sha1_generic_mod_fini(void) |
1da177e4 | 86 | { |
54ccb367 | 87 | crypto_unregister_shash(&alg); |
1da177e4 LT |
88 | } |
89 | ||
c4741b23 | 90 | subsys_initcall(sha1_generic_mod_init); |
3af5b90b | 91 | module_exit(sha1_generic_mod_fini); |
1da177e4 LT |
92 | |
93 | MODULE_LICENSE("GPL"); | |
94 | MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm"); | |
b3be9a6d | 95 | |
5d26a105 | 96 | MODULE_ALIAS_CRYPTO("sha1"); |
3e14dcf7 | 97 | MODULE_ALIAS_CRYPTO("sha1-generic"); |