1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Common values for SHA-1 algorithms
4 */
5
6 #ifndef _CRYPTO_SHA1_H
7 #define _CRYPTO_SHA1_H
8
9 #include <linux/types.h>
10
11 #define SHA1_DIGEST_SIZE 20
12 #define SHA1_BLOCK_SIZE 64
13
14 #define SHA1_H0 0x67452301UL
15 #define SHA1_H1 0xefcdab89UL
16 #define SHA1_H2 0x98badcfeUL
17 #define SHA1_H3 0x10325476UL
18 #define SHA1_H4 0xc3d2e1f0UL
19
20 extern const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE];
21
22 struct sha1_state {
23 u32 state[SHA1_DIGEST_SIZE / 4];
24 u64 count;
25 u8 buffer[SHA1_BLOCK_SIZE];
26 };
27
28 struct shash_desc;
29
30 extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
31 unsigned int len);
32
33 extern int crypto_sha1_finup(struct shash_desc *desc, const u8 *data,
34 unsigned int len, u8 *hash);
35
36 /*
37 * An implementation of SHA-1's compression function. Don't use in new code!
38 * You shouldn't be using SHA-1, and even if you *have* to use SHA-1, this isn't
39 * the correct way to hash something with SHA-1 (use crypto_shash instead).
40 */
41 #define SHA1_DIGEST_WORDS (SHA1_DIGEST_SIZE / 4)
42 #define SHA1_WORKSPACE_WORDS 16
43 void sha1_init(__u32 *buf);
44 void sha1_transform(__u32 *digest, const char *data, __u32 *W);
45
46 #endif /* _CRYPTO_SHA1_H */
47
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