To update vsperf/packet-forwarding configuration files
[kvmfornfv.git] / kernel / crypto / sha1_generic.c
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 static 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
41 int 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 }
46 EXPORT_SYMBOL(crypto_sha1_update);
47
48 static 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
54 int 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 }
60 EXPORT_SYMBOL(crypto_sha1_finup);
61
62 static 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
78 static int __init sha1_generic_mod_init(void)
79 {
80         return crypto_register_shash(&alg);
81 }
82
83 static void __exit sha1_generic_mod_fini(void)
84 {
85         crypto_unregister_shash(&alg);
86 }
87
88 module_init(sha1_generic_mod_init);
89 module_exit(sha1_generic_mod_fini);
90
91 MODULE_LICENSE("GPL");
92 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
93
94 MODULE_ALIAS_CRYPTO("sha1");
95 MODULE_ALIAS_CRYPTO("sha1-generic");