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 "auth-options.h"
42#include "log.h"
43#include "misc.h"	/* servconf.h needs misc.h for struct ForwardOptions */
44#include "servconf.h"
45#include "hostfile.h"
46#include "auth.h"
47#include "ssh.h"
48#include "ssh_api.h"
49
50int nischeck(char *);
51
52int
53sys_auth_passwd(struct ssh *ssh, const char *password)
54{
55	Authctxt *authctxt = ssh->authctxt;
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	if (pw_password == NULL)
64		return 0;
65
66	/* Check for users with no password. */
67	if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0)
68		return (1);
69
70	/* Encrypt the candidate password using the proper salt. */
71	salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx";
72
73	/*
74	 * Authentication is accepted if the encrypted passwords
75	 * are identical.
76	 */
77#ifdef UNIXWARE_LONG_PASSWORDS
78	if (!nischeck(pw->pw_name)) {
79		result = ((strcmp(bigcrypt(password, salt), pw_password) == 0)
80		||  (strcmp(osr5bigcrypt(password, salt), pw_password) == 0));
81	}
82	else
83#endif /* UNIXWARE_LONG_PASSWORDS */
84		result = (strcmp(xcrypt(password, salt), pw_password) == 0);
85
86#ifdef USE_LIBIAF
87	if (authctxt->valid)
88		free(pw_password);
89#endif
90	return(result);
91}
92
93#ifdef UNIXWARE_LONG_PASSWORDS
94int
95nischeck(char *namep)
96{
97	char password_file[] = "/etc/passwd";
98	FILE *fd;
99	struct passwd *ent = NULL;
100
101	if ((fd = fopen (password_file, "r")) == NULL) {
102		/*
103		 * If the passwd file has disappeared we are in a bad state.
104		 * However, returning 0 will send us back through the
105		 * authentication scheme that has checked the ia database for
106		 * passwords earlier.
107		 */
108		return(0);
109	}
110
111	/*
112	 * fgetpwent() only reads from password file, so we know for certain
113	 * that the user is local.
114	 */
115	while (ent = fgetpwent(fd)) {
116		if (strcmp (ent->pw_name, namep) == 0) {
117			/* Local user */
118			fclose (fd);
119			return(0);
120		}
121	}
122
123	fclose (fd);
124	return (1);
125}
126
127#endif /* UNIXWARE_LONG_PASSWORDS */
128
129/*
130	NOTE: ia_get_logpwd() allocates memory for arg 2
131	functions that call shadow_pw() will need to free
132 */
133
134#ifdef USE_LIBIAF
135char *
136get_iaf_password(struct passwd *pw)
137{
138	char *pw_password = NULL;
139
140	uinfo_t uinfo;
141	if (!ia_openinfo(pw->pw_name,&uinfo)) {
142		ia_get_logpwd(uinfo, &pw_password);
143		if (pw_password == NULL)
144			fatal("ia_get_logpwd: Unable to get the shadow passwd");
145		ia_closeinfo(uinfo);
146		return pw_password;
147	}
148	else
149		fatal("ia_openinfo: Unable to open the shadow passwd file");
150}
151#endif /* USE_LIBIAF */
152#endif /* HAVE_LIBIAF and not HAVE_SECUREWARE */
153
154