Merge branch 'parisc-5.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
[linux-2.6-microblaze.git] / crypto / sha1_generic.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
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>
13  */
14 #include <crypto/internal/hash.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/mm.h>
18 #include <linux/cryptohash.h>
19 #include <linux/types.h>
20 #include <crypto/sha.h>
21 #include <crypto/sha1_base.h>
22 #include <asm/byteorder.h>
23
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
31 static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src,
32                                   int blocks)
33 {
34         u32 temp[SHA_WORKSPACE_WORDS];
35
36         while (blocks--) {
37                 sha_transform(sst->state, src, temp);
38                 src += SHA1_BLOCK_SIZE;
39         }
40         memzero_explicit(temp, sizeof(temp));
41 }
42
43 int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
44                        unsigned int len)
45 {
46         return sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
47 }
48 EXPORT_SYMBOL(crypto_sha1_update);
49
50 static int sha1_final(struct shash_desc *desc, u8 *out)
51 {
52         sha1_base_do_finalize(desc, sha1_generic_block_fn);
53         return sha1_base_finish(desc, out);
54 }
55
56 int crypto_sha1_finup(struct shash_desc *desc, const u8 *data,
57                       unsigned int len, u8 *out)
58 {
59         sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
60         return sha1_final(desc, out);
61 }
62 EXPORT_SYMBOL(crypto_sha1_finup);
63
64 static struct shash_alg alg = {
65         .digestsize     =       SHA1_DIGEST_SIZE,
66         .init           =       sha1_base_init,
67         .update         =       crypto_sha1_update,
68         .final          =       sha1_final,
69         .finup          =       crypto_sha1_finup,
70         .descsize       =       sizeof(struct sha1_state),
71         .base           =       {
72                 .cra_name       =       "sha1",
73                 .cra_driver_name=       "sha1-generic",
74                 .cra_priority   =       100,
75                 .cra_blocksize  =       SHA1_BLOCK_SIZE,
76                 .cra_module     =       THIS_MODULE,
77         }
78 };
79
80 static int __init sha1_generic_mod_init(void)
81 {
82         return crypto_register_shash(&alg);
83 }
84
85 static void __exit sha1_generic_mod_fini(void)
86 {
87         crypto_unregister_shash(&alg);
88 }
89
90 subsys_initcall(sha1_generic_mod_init);
91 module_exit(sha1_generic_mod_fini);
92
93 MODULE_LICENSE("GPL");
94 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
95
96 MODULE_ALIAS_CRYPTO("sha1");
97 MODULE_ALIAS_CRYPTO("sha1-generic");