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 "servconf.h"
46 #include "hostfile.h"
47 #include "auth.h"
48 #include "ssh.h"
49
50 int nischeck(char *);
51
52 int
sys_auth_passwd(Authctxt * authctxt,const char * password)53 sys_auth_passwd(Authctxt *authctxt, const char *password)
54 {
55 struct passwd *pw = authctxt->pw;
56 char *salt;
57 int result;
58
59 /* Just use the supplied fake password if authctxt is invalid */
60 char *pw_password = authctxt->valid ? shadow_pw(pw) : pw->pw_passwd;
61
62 /* Check for users with no password. */
63 if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0)
64 return (1);
65
66 /* Encrypt the candidate password using the proper salt. */
67 salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx";
68
69 /*
70 * Authentication is accepted if the encrypted passwords
71 * are identical.
72 */
73 #ifdef UNIXWARE_LONG_PASSWORDS
74 if (!nischeck(pw->pw_name)) {
75 result = ((strcmp(bigcrypt(password, salt), pw_password) == 0)
76 || (strcmp(osr5bigcrypt(password, salt), pw_password) == 0));
77 }
78 else
79 #endif /* UNIXWARE_LONG_PASSWORDS */
80 result = (strcmp(xcrypt(password, salt), pw_password) == 0);
81
82 #ifdef USE_LIBIAF
83 if (authctxt->valid)
84 free(pw_password);
85 #endif
86 return(result);
87 }
88
89 #ifdef UNIXWARE_LONG_PASSWORDS
90 int
nischeck(char * namep)91 nischeck(char *namep)
92 {
93 char password_file[] = "/etc/passwd";
94 FILE *fd;
95 struct passwd *ent = NULL;
96
97 if ((fd = fopen (password_file, "r")) == NULL) {
98 /*
99 * If the passwd file has dissapeared we are in a bad state.
100 * However, returning 0 will send us back through the
101 * authentication scheme that has checked the ia database for
102 * passwords earlier.
103 */
104 return(0);
105 }
106
107 /*
108 * fgetpwent() only reads from password file, so we know for certain
109 * that the user is local.
110 */
111 while (ent = fgetpwent(fd)) {
112 if (strcmp (ent->pw_name, namep) == 0) {
113 /* Local user */
114 fclose (fd);
115 return(0);
116 }
117 }
118
119 fclose (fd);
120 return (1);
121 }
122
123 #endif /* UNIXWARE_LONG_PASSWORDS */
124
125 /*
126 NOTE: ia_get_logpwd() allocates memory for arg 2
127 functions that call shadow_pw() will need to free
128 */
129
130 #ifdef USE_LIBIAF
131 char *
get_iaf_password(struct passwd * pw)132 get_iaf_password(struct passwd *pw)
133 {
134 char *pw_password = NULL;
135
136 uinfo_t uinfo;
137 if (!ia_openinfo(pw->pw_name,&uinfo)) {
138 ia_get_logpwd(uinfo, &pw_password);
139 if (pw_password == NULL)
140 fatal("ia_get_logpwd: Unable to get the shadow passwd");
141 ia_closeinfo(uinfo);
142 return pw_password;
143 }
144 else
145 fatal("ia_openinfo: Unable to open the shadow passwd file");
146 }
147 #endif /* USE_LIBIAF */
148 #endif /* HAVE_LIBIAF and not HAVE_SECUREWARE */
149
150