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
20extern const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE];
21
22struct sha1_state {
23	u32 state[SHA1_DIGEST_SIZE / 4];
24	u64 count;
25	u8 buffer[SHA1_BLOCK_SIZE];
26};
27
28struct shash_desc;
29
30extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
31			      unsigned int len);
32
33extern 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
43void sha1_init(__u32 *buf);
44void sha1_transform(__u32 *digest, const char *data, __u32 *W);
45
46#endif /* _CRYPTO_SHA1_H */