1/*
2 * UFC-crypt: ultra fast crypt(3) implementation
3 *
4 * Copyright (C) 1991-2021 Free Software Foundation, Inc.
5 *
6 * The GNU C Library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * The GNU C Library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with the GNU C Library; if not, see
18 * <https://www.gnu.org/licenses/>.
19 *
20 * @(#)crypt.h 1.5 12/20/96
21 *
22 */
23
24#ifndef _CRYPT_H
25#define _CRYPT_H 1
26
27#include <features.h>
28
29__BEGIN_DECLS
30
31/* One-way hash PHRASE, returning a string suitable for storage in the
32 user database. SALT selects the one-way function to use, and
33 ensures that no two users' hashes are the same, even if they use
34 the same passphrase. The return value points to static storage
35 which will be overwritten by the next call to crypt. */
36extern char *crypt (const char *__phrase, const char *__salt)
37 __THROW __nonnull ((1, 2));
38
39#ifdef __USE_GNU
40
41/* This structure provides scratch and output buffers for 'crypt_r'.
42 Its contents should not be accessed directly. */
43struct crypt_data
44 {
45 char keysched[16 * 8];
46 char sb0[32768];
47 char sb1[32768];
48 char sb2[32768];
49 char sb3[32768];
50 /* end-of-aligment-critical-data */
51 char crypt_3_buf[14];
52 char current_salt[2];
53 long int current_saltbits;
54 int direction, initialized;
55 };
56
57/* Thread-safe version of 'crypt'.
58 DATA must point to a 'struct crypt_data' allocated by the caller.
59 Before the first call to 'crypt_r' with a new 'struct crypt_data',
60 that object must be initialized to all zeroes. The pointer
61 returned, if not NULL, will point within DATA. (It will still be
62 overwritten by the next call to 'crypt_r' with the same DATA.) */
63extern char *crypt_r (const char *__phrase, const char *__salt,
64 struct crypt_data * __restrict __data)
65 __THROW __nonnull ((1, 2, 3));
66#endif
67
68__END_DECLS
69
70#endif /* crypt.h */
71