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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
* CU sudo version 1.5.8
* Copyright (c) 1996, 1998, 1999 Todd C. Miller <Todd.Miller@courtesan.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Please send bugs, changes, problems to sudo-bugs@courtesan.com
*
*******************************************************************
*
* This module contains sudo_getpwuid(), a function that
* Makes a dynamic copy of the struct passwd returned by
* getpwuid() and substitutes the shadow password if
* necesary.
*
* Todd C. Miller Mon Nov 20 13:53:06 MST 1995
*/
#include "config.h"
#include <stdio.h>
#ifdef STDC_HEADERS
#include <stdlib.h>
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
#include <string.h>
#endif /* HAVE_STRING_H */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <pwd.h>
#ifdef HAVE_GETSPNAM
# include <shadow.h>
#endif /* HAVE_GETSPNAM */
#ifdef HAVE_GETPRPWNAM
# ifdef __hpux
# include <hpsecurity.h>
# else
# include <sys/security.h>
# endif /* __hpux */
# include <prot.h>
#endif /* HAVE_GETPRPWNAM */
#ifdef HAVE_GETPWANAM
# include <sys/label.h>
# include <sys/audit.h>
# include <pwdadj.h>
#endif /* HAVE_GETPWANAM */
#ifdef HAVE_GETAUTHUID
# include <auth.h>
#endif /* HAVE_GETAUTHUID */
#include "sudo.h"
#ifndef lint
static const char rcsid[] = "$Sudo$";
#endif /* lint */
#ifndef STDC_HEADERS
extern char *getenv __P((const char *));
#endif /* !STDC_HEADERS */
/*
* Global variables (yuck)
*/
#if defined(HAVE_GETPRPWNAM) && defined(__alpha)
int crypt_type = INT_MAX;
#endif /* HAVE_GETPRPWNAM && __alpha */
/*
* Local functions not visible outside getspwuid.c
*/
static char *sudo_getshell __P((struct passwd *));
static char *sudo_getepw __P((struct passwd *));
/**********************************************************************
*
* sudo_getshell()
*
* This function returns the user's shell based on either the
* SHELL evariable or the passwd(5) entry (in that order).
*/
static char *sudo_getshell(pw)
struct passwd *pw;
{
char *pw_shell;
if ((pw_shell = getenv("SHELL")) == NULL)
pw_shell = pw -> pw_shell;
#ifdef _PATH_BSHELL
/* empty string "" means bourne shell */
if (*pw_shell == '\0')
pw_shell = _PATH_BSHELL;
#endif /* _PATH_BSHELL */
return(pw_shell);
}
/**********************************************************************
*
* sudo_getepw()
*
* This function returns the encrypted password for the user described
* by pw. If there is a shadow password it is returned, else the
* normal UN*X password is returned instead.
*/
static char *sudo_getepw(pw)
struct passwd *pw;
{
/* if there is a function to check for shadow enabled, use it... */
#ifdef HAVE_ISCOMSEC
if (!iscomsec())
return(pw->pw_passwd);
#endif /* HAVE_ISCOMSEC */
#ifdef HAVE_ISSECURE
if (!issecure())
return(pw->pw_passwd);
#endif /* HAVE_ISSECURE */
#ifdef HAVE_GETPRPWNAM
{
struct pr_passwd *spw;
spw = getprpwnam(pw->pw_name);
if (spw != NULL && spw->ufld.fd_encrypt != NULL) {
# ifdef __alpha
crypt_type = spw -> ufld.fd_oldcrypt;
# endif /* __alpha */
return(spw -> ufld.fd_encrypt);
}
}
#endif /* HAVE_GETPRPWNAM */
#ifdef HAVE_GETSPNAM
{
struct spwd *spw;
if ((spw = getspnam(pw -> pw_name)) && spw -> sp_pwdp)
return(spw -> sp_pwdp);
}
#endif /* HAVE_GETSPNAM */
#ifdef HAVE_GETSPWUID
{
struct s_passwd *spw;
if ((spw = getspwuid(pw -> pw_uid)) && spw -> pw_passwd)
return(spw -> pw_passwd);
}
#endif /* HAVE_GETSPWUID */
#ifdef HAVE_GETPWANAM
{
struct passwd_adjunct *spw;
if ((spw = getpwanam(pw -> pw_name)) && spw -> pwa_passwd)
return(spw -> pwa_passwd);
}
#endif /* HAVE_GETPWANAM */
#ifdef HAVE_GETAUTHUID
{
AUTHORIZATION *spw;
if ((spw = getauthuid(pw -> pw_uid)) && spw -> a_password)
return(spw -> a_password);
}
#endif /* HAVE_GETAUTHUID */
/* Fall back on normal passwd */
return(pw->pw_passwd);
}
/**********************************************************************
*
* sudo_getpwuid()
*
* This function dynamically allocates space for a struct password
* and the constituent parts that we care about. If shadow passwords
* are in use, it substitutes the shadow password for pw_passwd.
*/
struct passwd *sudo_getpwuid(uid)
uid_t uid;
{
struct passwd *pw, *local_pw;
if ((pw = getpwuid(uid)) == NULL)
return(NULL);
/* allocate space for a local copy of pw */
local_pw = (struct passwd *) emalloc(sizeof(struct passwd));
/*
* Copy the struct passwd and the interesting strings...
*/
(void) memcpy(local_pw, pw, sizeof(struct passwd));
local_pw->pw_name = estrdup(pw->pw_name);
local_pw->pw_dir = estrdup(pw->pw_dir);
/* pw_shell is a special case since we overide with $SHELL */
local_pw->pw_shell = estrdup(sudo_getshell(pw));
/* pw_passwd gets a shadow password if applicable */
local_pw->pw_passwd = estrdup(sudo_getepw(pw));
return(local_pw);
}
|
