Annotation of src/usr.bin/sudo/getspwuid.c, Revision 1.2
1.1 millert 1: /*
2: * Copyright (c) 1996, 1998, 1999 Todd C. Miller <Todd.Miller@courtesan.com>
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: *
9: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: *
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * 3. The name of the author may not be used to endorse or promote products
17: * derived from this software without specific prior written permission.
18: *
19: * 4. Products derived from this software may not be called "Sudo" nor
20: * may "Sudo" appear in their names without specific prior written
21: * permission from the author.
22: *
23: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
24: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
25: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
26: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33: */
34:
35: #include "config.h"
36:
37: #include <stdio.h>
38: #ifdef STDC_HEADERS
39: # include <stdlib.h>
40: #endif /* STDC_HEADERS */
41: #ifdef HAVE_STRING_H
42: # include <string.h>
43: #endif /* HAVE_STRING_H */
44: #ifdef HAVE_STRINGS_H
45: # include <strings.h>
46: #endif /* HAVE_STRINGS_H */
47: #ifdef HAVE_UNISTD_H
48: # include <unistd.h>
49: #endif /* HAVE_UNISTD_H */
50: #include <sys/types.h>
51: #include <sys/stat.h>
52: #include <sys/param.h>
53: #include <pwd.h>
54: #ifdef HAVE_GETSPNAM
55: # include <shadow.h>
56: #endif /* HAVE_GETSPNAM */
57: #ifdef HAVE_GETPRPWNAM
58: # ifdef __hpux
59: # undef MAXINT
60: # include <hpsecurity.h>
61: # else
62: # include <sys/security.h>
63: # endif /* __hpux */
64: # include <prot.h>
65: #endif /* HAVE_GETPRPWNAM */
66: #ifdef HAVE_GETPWANAM
67: # include <sys/label.h>
68: # include <sys/audit.h>
69: # include <pwdadj.h>
70: #endif /* HAVE_GETPWANAM */
71: #ifdef HAVE_GETAUTHUID
72: # include <auth.h>
73: #endif /* HAVE_GETAUTHUID */
74:
75: #include "sudo.h"
76:
77: #ifndef lint
1.2 ! millert 78: static const char rcsid[] = "$Sudo: getspwuid.c,v 1.56 2000/02/18 17:56:26 millert Exp $";
1.1 millert 79: #endif /* lint */
80:
81: #ifndef STDC_HEADERS
82: extern char *getenv __P((const char *));
83: #endif /* !STDC_HEADERS */
84:
85: /*
86: * Global variables (yuck)
87: */
88: #if defined(HAVE_GETPRPWNAM) && defined(__alpha)
89: int crypt_type = INT_MAX;
90: #endif /* HAVE_GETPRPWNAM && __alpha */
91:
92:
93: /*
94: * Local functions not visible outside getspwuid.c
95: */
96: static char *sudo_getshell __P((struct passwd *));
97:
98:
99: /*
100: * Return the user's shell based on either the SHELL
101: * environment variable or the passwd(5) entry (in that order).
102: */
103: static char *
104: sudo_getshell(pw)
105: struct passwd *pw;
106: {
107: char *pw_shell;
108:
109: if ((pw_shell = getenv("SHELL")) == NULL)
110: pw_shell = pw->pw_shell;
111:
112: #ifdef _PATH_BSHELL
113: /* empty string "" means bourne shell */
114: if (*pw_shell == '\0')
115: pw_shell = _PATH_BSHELL;
116: #endif /* _PATH_BSHELL */
117:
118: return(pw_shell);
119: }
120:
121: /*
122: * Return the encrypted password for the user described by pw. If shadow
123: * passwords are in use, look in the shadow file.
124: */
1.2 ! millert 125: char *
1.1 millert 126: sudo_getepw(pw)
127: struct passwd *pw;
128: {
129:
130: /* If there is a function to check for shadow enabled, use it... */
131: #ifdef HAVE_ISCOMSEC
132: if (!iscomsec())
133: return(pw->pw_passwd);
134: #endif /* HAVE_ISCOMSEC */
135: #ifdef HAVE_ISSECURE
136: if (!issecure())
137: return(pw->pw_passwd);
138: #endif /* HAVE_ISSECURE */
139:
140: #ifdef HAVE_GETPRPWNAM
141: {
142: struct pr_passwd *spw;
143:
144: spw = getprpwnam(pw->pw_name);
145: if (spw != NULL && spw->ufld.fd_encrypt != NULL) {
146: # ifdef __alpha
147: crypt_type = spw->ufld.fd_oldcrypt;
148: # endif /* __alpha */
149: return(spw->ufld.fd_encrypt);
150: }
151: }
152: #endif /* HAVE_GETPRPWNAM */
153: #ifdef HAVE_GETSPNAM
154: {
155: struct spwd *spw;
156:
157: if ((spw = getspnam(pw->pw_name)) && spw->sp_pwdp)
158: return(spw->sp_pwdp);
159: }
160: #endif /* HAVE_GETSPNAM */
161: #ifdef HAVE_GETSPWUID
162: {
163: struct s_passwd *spw;
164:
165: if ((spw = getspwuid(pw->pw_uid)) && spw->pw_passwd)
166: return(spw->pw_passwd);
167: }
168: #endif /* HAVE_GETSPWUID */
169: #ifdef HAVE_GETPWANAM
170: {
171: struct passwd_adjunct *spw;
172:
173: if ((spw = getpwanam(pw->pw_name)) && spw->pwa_passwd)
174: return(spw->pwa_passwd);
175: }
176: #endif /* HAVE_GETPWANAM */
177: #ifdef HAVE_GETAUTHUID
178: {
179: AUTHORIZATION *spw;
180:
181: if ((spw = getauthuid(pw->pw_uid)) && spw->a_password)
182: return(spw->a_password);
183: }
184: #endif /* HAVE_GETAUTHUID */
185:
186: /* Fall back on normal password. */
187: return(pw->pw_passwd);
188: }
189:
190: /*
191: * Dynamically allocate space for a struct password and the constituent parts
192: * that we care about. Fills in pw_passwd from shadow file if necessary.
193: */
194: struct passwd *
195: sudo_getpwuid(uid)
196: uid_t uid;
197: {
198: struct passwd *pw, *local_pw;
199:
200: if ((pw = getpwuid(uid)) == NULL)
201: return(NULL);
202:
203: /* Allocate space for a local copy of pw. */
204: local_pw = (struct passwd *) emalloc(sizeof(struct passwd));
205:
206: /*
207: * Copy the struct passwd and the interesting strings...
208: */
209: (void) memcpy(local_pw, pw, sizeof(struct passwd));
210: local_pw->pw_name = estrdup(pw->pw_name);
211: local_pw->pw_dir = estrdup(pw->pw_dir);
212:
213: /* pw_shell is a special case since we overide with $SHELL */
214: local_pw->pw_shell = estrdup(sudo_getshell(pw));
215:
216: /* pw_passwd gets a shadow password if applicable */
217: local_pw->pw_passwd = estrdup(sudo_getepw(pw));
218:
219: return(local_pw);
220: }
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