Commit | Line | Data |
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1da177e4 LT |
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 | */ | |
54ccb367 | 19 | #include <crypto/internal/hash.h> |
1da177e4 LT |
20 | #include <linux/init.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/mm.h> | |
1da177e4 | 23 | #include <linux/cryptohash.h> |
06ace7a9 | 24 | #include <linux/types.h> |
5265eeb2 | 25 | #include <crypto/sha.h> |
7c71f0f7 | 26 | #include <crypto/sha1_base.h> |
1da177e4 LT |
27 | #include <asm/byteorder.h> |
28 | ||
7c71f0f7 AB |
29 | static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src, |
30 | int blocks) | |
1da177e4 | 31 | { |
7c71f0f7 | 32 | u32 temp[SHA_WORKSPACE_WORDS]; |
54ccb367 | 33 | |
7c71f0f7 AB |
34 | while (blocks--) { |
35 | sha_transform(sst->state, src, temp); | |
36 | src += SHA1_BLOCK_SIZE; | |
37 | } | |
38 | memzero_explicit(temp, sizeof(temp)); | |
1da177e4 LT |
39 | } |
40 | ||
7c390170 | 41 | int crypto_sha1_update(struct shash_desc *desc, const u8 *data, |
7c71f0f7 | 42 | unsigned int len) |
1da177e4 | 43 | { |
7c71f0f7 | 44 | return sha1_base_do_update(desc, data, len, sha1_generic_block_fn); |
1da177e4 | 45 | } |
7c390170 | 46 | EXPORT_SYMBOL(crypto_sha1_update); |
1da177e4 | 47 | |
54ccb367 | 48 | static int sha1_final(struct shash_desc *desc, u8 *out) |
1da177e4 | 49 | { |
7c71f0f7 AB |
50 | sha1_base_do_finalize(desc, sha1_generic_block_fn); |
51 | return sha1_base_finish(desc, out); | |
1da177e4 LT |
52 | } |
53 | ||
7c71f0f7 AB |
54 | int crypto_sha1_finup(struct shash_desc *desc, const u8 *data, |
55 | unsigned int len, u8 *out) | |
e2a7ce4e | 56 | { |
7c71f0f7 AB |
57 | sha1_base_do_update(desc, data, len, sha1_generic_block_fn); |
58 | return sha1_final(desc, out); | |
e2a7ce4e | 59 | } |
7c71f0f7 | 60 | EXPORT_SYMBOL(crypto_sha1_finup); |
e2a7ce4e | 61 | |
54ccb367 AKR |
62 | static struct shash_alg alg = { |
63 | .digestsize = SHA1_DIGEST_SIZE, | |
7c71f0f7 | 64 | .init = sha1_base_init, |
7c390170 | 65 | .update = crypto_sha1_update, |
54ccb367 | 66 | .final = sha1_final, |
7c71f0f7 | 67 | .finup = crypto_sha1_finup, |
e2a7ce4e | 68 | .descsize = sizeof(struct sha1_state), |
54ccb367 AKR |
69 | .base = { |
70 | .cra_name = "sha1", | |
71 | .cra_driver_name= "sha1-generic", | |
72 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
73 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
74 | .cra_module = THIS_MODULE, | |
75 | } | |
1da177e4 LT |
76 | }; |
77 | ||
3af5b90b | 78 | static int __init sha1_generic_mod_init(void) |
1da177e4 | 79 | { |
54ccb367 | 80 | return crypto_register_shash(&alg); |
1da177e4 LT |
81 | } |
82 | ||
3af5b90b | 83 | static void __exit sha1_generic_mod_fini(void) |
1da177e4 | 84 | { |
54ccb367 | 85 | crypto_unregister_shash(&alg); |
1da177e4 LT |
86 | } |
87 | ||
3af5b90b KB |
88 | module_init(sha1_generic_mod_init); |
89 | module_exit(sha1_generic_mod_fini); | |
1da177e4 LT |
90 | |
91 | MODULE_LICENSE("GPL"); | |
92 | MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm"); | |
b3be9a6d | 93 | |
5d26a105 | 94 | MODULE_ALIAS_CRYPTO("sha1"); |
3e14dcf7 | 95 | MODULE_ALIAS_CRYPTO("sha1-generic"); |