ipv6: Allow non-gateway ECMP for IPv6
[linux-2.6-block.git] / crypto / sha1_generic.c
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1da177e4
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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>
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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>
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27#include <asm/byteorder.h>
28
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29const 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};
34EXPORT_SYMBOL_GPL(sha1_zero_message_hash);
35
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AB
36static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src,
37 int blocks)
1da177e4 38{
7c71f0f7 39 u32 temp[SHA_WORKSPACE_WORDS];
54ccb367 40
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AB
41 while (blocks--) {
42 sha_transform(sst->state, src, temp);
43 src += SHA1_BLOCK_SIZE;
44 }
45 memzero_explicit(temp, sizeof(temp));
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46}
47
7c390170 48int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
7c71f0f7 49 unsigned int len)
1da177e4 50{
7c71f0f7 51 return sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
1da177e4 52}
7c390170 53EXPORT_SYMBOL(crypto_sha1_update);
1da177e4 54
54ccb367 55static int sha1_final(struct shash_desc *desc, u8 *out)
1da177e4 56{
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57 sha1_base_do_finalize(desc, sha1_generic_block_fn);
58 return sha1_base_finish(desc, out);
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59}
60
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61int crypto_sha1_finup(struct shash_desc *desc, const u8 *data,
62 unsigned int len, u8 *out)
e2a7ce4e 63{
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64 sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
65 return sha1_final(desc, out);
e2a7ce4e 66}
7c71f0f7 67EXPORT_SYMBOL(crypto_sha1_finup);
e2a7ce4e 68
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AKR
69static struct shash_alg alg = {
70 .digestsize = SHA1_DIGEST_SIZE,
7c71f0f7 71 .init = sha1_base_init,
7c390170 72 .update = crypto_sha1_update,
54ccb367 73 .final = sha1_final,
7c71f0f7 74 .finup = crypto_sha1_finup,
e2a7ce4e 75 .descsize = sizeof(struct sha1_state),
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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 }
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83};
84
3af5b90b 85static int __init sha1_generic_mod_init(void)
1da177e4 86{
54ccb367 87 return crypto_register_shash(&alg);
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88}
89
3af5b90b 90static void __exit sha1_generic_mod_fini(void)
1da177e4 91{
54ccb367 92 crypto_unregister_shash(&alg);
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93}
94
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95module_init(sha1_generic_mod_init);
96module_exit(sha1_generic_mod_fini);
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97
98MODULE_LICENSE("GPL");
99MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
b3be9a6d 100
5d26a105 101MODULE_ALIAS_CRYPTO("sha1");
3e14dcf7 102MODULE_ALIAS_CRYPTO("sha1-generic");