1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* UFC-crypt: ultra fast crypt(3) implementation
*
* Copyright (C) 1991-2016 Free Software Foundation, Inc.
*
* The GNU C Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* The GNU C Library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the GNU C Library; if not, see
* <http://www.gnu.org/licenses/>.
*
* crypt entry points
*
* @(#)crypt-entry.c 1.2 12/20/96
*
*/
#ifdef DEBUG
#include <stdio.h>
#endif
#include <string.h>
#include <errno.h>
#include <fips-private.h>
#ifndef STATIC
#define STATIC static
#endif
#include "crypt-private.h"
/* Prototypes for local functions. */
#ifndef __GNU_LIBRARY__
void _ufc_clearmem (char *start, int cnt);
#else
#define _ufc_clearmem(start, cnt) memset(start, 0, cnt)
#endif
extern char *__md5_crypt_r (const char *key, const char *salt, char *buffer,
int buflen);
extern char *__md5_crypt (const char *key, const char *salt);
extern char *__sha256_crypt_r (const char *key, const char *salt,
char *buffer, int buflen);
extern char *__sha256_crypt (const char *key, const char *salt);
extern char *__sha512_crypt_r (const char *key, const char *salt,
char *buffer, int buflen);
extern char *__sha512_crypt (const char *key, const char *salt);
/* Define our magic string to mark salt for MD5 encryption
replacement. This is meant to be the same as for other MD5 based
encryption implementations. */
static const char md5_salt_prefix[] = "$1$";
/* Magic string for SHA256 encryption. */
static const char sha256_salt_prefix[] = "$5$";
/* Magic string for SHA512 encryption. */
static const char sha512_salt_prefix[] = "$6$";
/* For use by the old, non-reentrant routines (crypt/encrypt/setkey) */
extern struct crypt_data _ufc_foobar;
/*
* UNIX crypt function
*/
char *
__crypt_r (const char *key, const char *salt,
struct crypt_data * __restrict data)
{
ufc_long res[4];
char ktab[9];
ufc_long xx = 25; /* to cope with GCC long long compiler bugs */
#ifdef _LIBC
/* Try to find out whether we have to use MD5 encryption replacement. */
if (strncmp (md5_salt_prefix, salt, sizeof (md5_salt_prefix) - 1) == 0)
{
/* FIPS rules out MD5 password encryption. */
if (fips_enabled_p ())
{
__set_errno (EPERM);
return NULL;
}
return __md5_crypt_r (key, salt, (char *) data,
sizeof (struct crypt_data));
}
/* Try to find out whether we have to use SHA256 encryption replacement. */
if (strncmp (sha256_salt_prefix, salt, sizeof (sha256_salt_prefix) - 1) == 0)
return __sha256_crypt_r (key, salt, (char *) data,
sizeof (struct crypt_data));
/* Try to find out whether we have to use SHA512 encryption replacement. */
if (strncmp (sha512_salt_prefix, salt, sizeof (sha512_salt_prefix) - 1) == 0)
return __sha512_crypt_r (key, salt, (char *) data,
sizeof (struct crypt_data));
#endif
/*
* Hack DES tables according to salt
*/
if (!_ufc_setup_salt_r (salt, data))
{
__set_errno (EINVAL);
return NULL;
}
/* FIPS rules out DES password encryption. */
if (fips_enabled_p ())
{
__set_errno (EPERM);
return NULL;
}
/*
* Setup key schedule
*/
_ufc_clearmem (ktab, (int) sizeof (ktab));
(void) strncpy (ktab, key, 8);
_ufc_mk_keytab_r (ktab, data);
/*
* Go for the 25 DES encryptions
*/
_ufc_clearmem ((char*) res, (int) sizeof (res));
_ufc_doit_r (xx, data, &res[0]);
/*
* Do final permutations
*/
_ufc_dofinalperm_r (res, data);
/*
* And convert back to 6 bit ASCII
*/
_ufc_output_conversion_r (res[0], res[1], salt, data);
return data->crypt_3_buf;
}
weak_alias (__crypt_r, crypt_r)
char *
crypt (const char *key, const char *salt)
{
#ifdef _LIBC
/* Try to find out whether we have to use MD5 encryption replacement. */
if (strncmp (md5_salt_prefix, salt, sizeof (md5_salt_prefix) - 1) == 0
/* Let __crypt_r deal with the error code if FIPS is enabled. */
&& !fips_enabled_p ())
return __md5_crypt (key, salt);
/* Try to find out whether we have to use SHA256 encryption replacement. */
if (strncmp (sha256_salt_prefix, salt, sizeof (sha256_salt_prefix) - 1) == 0)
return __sha256_crypt (key, salt);
/* Try to find out whether we have to use SHA512 encryption replacement. */
if (strncmp (sha512_salt_prefix, salt, sizeof (sha512_salt_prefix) - 1) == 0)
return __sha512_crypt (key, salt);
#endif
return __crypt_r (key, salt, &_ufc_foobar);
}
/*
* To make fcrypt users happy.
* They don't need to call init_des.
*/
#ifdef _LIBC
weak_alias (crypt, fcrypt)
#else
char *
__fcrypt (const char *key, const char *salt)
{
return crypt (key, salt);
}
#endif
|
GitWeb