1/*
2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 * All rights reserved
5 * Password authentication. This file contains the functions to check whether
6 * the password is valid for the user.
7 *
8 * As far as I am concerned, the code I have written for this software

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31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include "includes.h"
39RCSID("$OpenBSD: auth-passwd.c,v 1.31 2004/01/30 09:48:57 markus Exp $");
40RCSID("$FreeBSD: head/crypto/openssh/auth-passwd.c 137019 2004-10-28 16:11:31Z des $");
41
42#include "packet.h"
43#include "log.h"
44#include "servconf.h"
45#include "auth.h"
46#include "auth-options.h"
47
48extern ServerOptions options;
49int sys_auth_passwd(Authctxt *, const char *);
50
51void
52disable_forwarding(void)
53{
54 no_port_forwarding_flag = 1;
55 no_agent_forwarding_flag = 1;
56 no_x11_forwarding_flag = 1;
57}
58
59/*
60 * Tries to authenticate the user using password. Returns true if
61 * authentication succeeds.
62 */
63int
64auth_password(Authctxt *authctxt, const char *password)
65{
66 struct passwd * pw = authctxt->pw;
67 int ok = authctxt->valid;
68#if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE)
69 static int expire_checked = 0;
70#endif
71
72#ifndef HAVE_CYGWIN
73 if (pw->pw_uid == 0 && options.permit_root_login != PERMIT_YES)
74 ok = 0;
75#endif

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96#endif
97#ifdef USE_PAM
98 if (options.use_pam)
99 return (sshpam_auth_passwd(authctxt, password) && ok);
100#endif
101#if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE)
102 if (!expire_checked) {
103 expire_checked = 1;
104 if (auth_shadow_pwexpired(authctxt)) {
105 disable_forwarding();
106 authctxt->force_pwchange = 1;
107 }
108 }
109#endif
110
111 return (sys_auth_passwd(authctxt, password) && ok);
112}
113
114#ifdef BSD_AUTH
115int
116sys_auth_passwd(Authctxt *authctxt, const char *password)
117{
118 struct passwd *pw = authctxt->pw;
119 auth_session_t *as;
120
121 as = auth_usercheck(pw->pw_name, authctxt->style, "auth-ssh",
122 (char *)password);
123 if (auth_getstate(as) & AUTH_PWEXPIRED) {
124 auth_close(as);
125 disable_forwarding();
126 authctxt->force_pwchange = 1;
127 return (1);
128 } else {
129 return (auth_close(as));
130 }
131}
132#elif !defined(CUSTOM_SYS_AUTH_PASSWD)
133int
134sys_auth_passwd(Authctxt *authctxt, const char *password)
135{
136 struct passwd *pw = authctxt->pw;

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