1 /*
2 * Copyright (c) 2005 The SCO Group. All rights reserved.
3 * Copyright (c) 2005 Tim Rice. 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 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "includes.h"
27
28 #if defined(HAVE_LIBIAF) && !defined(HAVE_SECUREWARE)
29 #include <sys/types.h>
30 #ifdef HAVE_CRYPT_H
31 # include <crypt.h>
32 #endif
33 #include <pwd.h>
34 #include <stdarg.h>
35 #include <stdlib.h>
36 #include <stdio.h>
37 #include <string.h>
38
39 #include "xmalloc.h"
40 #include "packet.h"
41 #include "buffer.h"
42 #include "key.h"
43 #include "auth-options.h"
44 #include "log.h"
45 #include "misc.h" /* servconf.h needs misc.h for struct ForwardOptions */
46 #include "servconf.h"
47 #include "hostfile.h"
48 #include "auth.h"
49 #include "ssh.h"
50
51 int nischeck(char *);
52
53 int
sys_auth_passwd(Authctxt * authctxt,const char * password)54 sys_auth_passwd(Authctxt *authctxt, const char *password)
55 {
56 struct passwd *pw = authctxt->pw;
57 char *salt;
58 int result;
59
60 /* Just use the supplied fake password if authctxt is invalid */
61 char *pw_password = authctxt->valid ? shadow_pw(pw) : pw->pw_passwd;
62
63 /* Check for users with no password. */
64 if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0)
65 return (1);
66
67 /* Encrypt the candidate password using the proper salt. */
68 salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx";
69
70 /*
71 * Authentication is accepted if the encrypted passwords
72 * are identical.
73 */
74 #ifdef UNIXWARE_LONG_PASSWORDS
75 if (!nischeck(pw->pw_name)) {
76 result = ((strcmp(bigcrypt(password, salt), pw_password) == 0)
77 || (strcmp(osr5bigcrypt(password, salt), pw_password) == 0));
78 }
79 else
80 #endif /* UNIXWARE_LONG_PASSWORDS */
81 result = (strcmp(xcrypt(password, salt), pw_password) == 0);
82
83 #ifdef USE_LIBIAF
84 if (authctxt->valid)
85 free(pw_password);
86 #endif
87 return(result);
88 }
89
90 #ifdef UNIXWARE_LONG_PASSWORDS
91 int
nischeck(char * namep)92 nischeck(char *namep)
93 {
94 char password_file[] = "/etc/passwd";
95 FILE *fd;
96 struct passwd *ent = NULL;
97
98 if ((fd = fopen (password_file, "r")) == NULL) {
99 /*
100 * If the passwd file has dissapeared we are in a bad state.
101 * However, returning 0 will send us back through the
102 * authentication scheme that has checked the ia database for
103 * passwords earlier.
104 */
105 return(0);
106 }
107
108 /*
109 * fgetpwent() only reads from password file, so we know for certain
110 * that the user is local.
111 */
112 while (ent = fgetpwent(fd)) {
113 if (strcmp (ent->pw_name, namep) == 0) {
114 /* Local user */
115 fclose (fd);
116 return(0);
117 }
118 }
119
120 fclose (fd);
121 return (1);
122 }
123
124 #endif /* UNIXWARE_LONG_PASSWORDS */
125
126 /*
127 NOTE: ia_get_logpwd() allocates memory for arg 2
128 functions that call shadow_pw() will need to free
129 */
130
131 #ifdef USE_LIBIAF
132 char *
get_iaf_password(struct passwd * pw)133 get_iaf_password(struct passwd *pw)
134 {
135 char *pw_password = NULL;
136
137 uinfo_t uinfo;
138 if (!ia_openinfo(pw->pw_name,&uinfo)) {
139 ia_get_logpwd(uinfo, &pw_password);
140 if (pw_password == NULL)
141 fatal("ia_get_logpwd: Unable to get the shadow passwd");
142 ia_closeinfo(uinfo);
143 return pw_password;
144 }
145 else
146 fatal("ia_openinfo: Unable to open the shadow passwd file");
147 }
148 #endif /* USE_LIBIAF */
149 #endif /* HAVE_LIBIAF and not HAVE_SECUREWARE */
150
151