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
51int nischeck(char *);
52
53int
54sys_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
91int
92nischeck(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
132char *
133get_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