blob: 39e3acc438d95c1ed1c15aaf9916b9489febbade [file] [log] [blame]
Kyle Swenson8d8f6542021-03-15 11:02:55 -06001/*
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
29static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src,
30 int blocks)
31{
32 u32 temp[SHA_WORKSPACE_WORDS];
33
34 while (blocks--) {
35 sha_transform(sst->state, src, temp);
36 src += SHA1_BLOCK_SIZE;
37 }
38 memzero_explicit(temp, sizeof(temp));
39}
40
41int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
42 unsigned int len)
43{
44 return sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
45}
46EXPORT_SYMBOL(crypto_sha1_update);
47
48static int sha1_final(struct shash_desc *desc, u8 *out)
49{
50 sha1_base_do_finalize(desc, sha1_generic_block_fn);
51 return sha1_base_finish(desc, out);
52}
53
54int crypto_sha1_finup(struct shash_desc *desc, const u8 *data,
55 unsigned int len, u8 *out)
56{
57 sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
58 return sha1_final(desc, out);
59}
60EXPORT_SYMBOL(crypto_sha1_finup);
61
62static struct shash_alg alg = {
63 .digestsize = SHA1_DIGEST_SIZE,
64 .init = sha1_base_init,
65 .update = crypto_sha1_update,
66 .final = sha1_final,
67 .finup = crypto_sha1_finup,
68 .descsize = sizeof(struct sha1_state),
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 }
76};
77
78static int __init sha1_generic_mod_init(void)
79{
80 return crypto_register_shash(&alg);
81}
82
83static void __exit sha1_generic_mod_fini(void)
84{
85 crypto_unregister_shash(&alg);
86}
87
88module_init(sha1_generic_mod_init);
89module_exit(sha1_generic_mod_fini);
90
91MODULE_LICENSE("GPL");
92MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
93
94MODULE_ALIAS_CRYPTO("sha1");
95MODULE_ALIAS_CRYPTO("sha1-generic");