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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/ssh/sshd/../auth-passwd.c	Lines:	0	41	0.0 %
Date:	2017-11-07	Branches:	0	22	0.0 %


/* $OpenBSD: auth-passwd.c,v 1.45 2016/07/21 01:39:35 dtucker Exp $ */
/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 * Password authentication.  This file contains the functions to check whether
 * the password is valid for the user.
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 *
 * Copyright (c) 1999 Dug Song.  All rights reserved.
 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>

#include <login_cap.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>

#include "packet.h"
#include "buffer.h"
#include "log.h"
#include "misc.h"
#include "servconf.h"
#include "key.h"
#include "hostfile.h"
#include "auth.h"
#include "auth-options.h"

extern Buffer loginmsg;
extern ServerOptions options;
int sys_auth_passwd(Authctxt *, const char *);

extern login_cap_t *lc;

#define DAY		(24L * 60 * 60) /* 1 day in seconds */
#define TWO_WEEKS	(2L * 7 * DAY)	/* 2 weeks in seconds */

#define MAX_PASSWORD_LEN	1024

static void
disable_forwarding(void)
{
	no_port_forwarding_flag = 1;
	no_agent_forwarding_flag = 1;
	no_x11_forwarding_flag = 1;
}

/*
 * Tries to authenticate the user using password.  Returns true if
 * authentication succeeds.
 */
int
auth_password(Authctxt *authctxt, const char *password)
{
	struct passwd * pw = authctxt->pw;
	int ok = authctxt->valid;

	if (strlen(password) > MAX_PASSWORD_LEN)
		return 0;

	if (pw->pw_uid == 0 && options.permit_root_login != PERMIT_YES)
		ok = 0;
	if (*password == '\0' && options.permit_empty_passwd == 0)
		return 0;
#ifdef KRB5
	if (options.kerberos_authentication == 1) {
		int ret = auth_krb5_password(authctxt, password);
		if (ret == 1 || ret == 0)
			return ret && ok;
		/* Fall back to ordinary passwd authentication. */
	}
#endif
	return (sys_auth_passwd(authctxt, password) && ok);
}

static void
warn_expiry(Authctxt *authctxt, auth_session_t *as)
{
	char buf[256];
	quad_t pwtimeleft, actimeleft, daysleft, pwwarntime, acwarntime;

	pwwarntime = acwarntime = TWO_WEEKS;

	pwtimeleft = auth_check_change(as);
	actimeleft = auth_check_expire(as);
	if (authctxt->valid) {
		pwwarntime = login_getcaptime(lc, "password-warn", TWO_WEEKS,
		    TWO_WEEKS);
		acwarntime = login_getcaptime(lc, "expire-warn", TWO_WEEKS,
		    TWO_WEEKS);
	}
	if (pwtimeleft != 0 && pwtimeleft < pwwarntime) {
		daysleft = pwtimeleft / DAY + 1;
		snprintf(buf, sizeof(buf),
		    "Your password will expire in %lld day%s.\n",
		    daysleft, daysleft == 1 ? "" : "s");
		buffer_append(&loginmsg, buf, strlen(buf));
	}
	if (actimeleft != 0 && actimeleft < acwarntime) {
		daysleft = actimeleft / DAY + 1;
		snprintf(buf, sizeof(buf),
		    "Your account will expire in %lld day%s.\n",
		    daysleft, daysleft == 1 ? "" : "s");
		buffer_append(&loginmsg, buf, strlen(buf));
	}
}

int
sys_auth_passwd(Authctxt *authctxt, const char *password)
{
	struct passwd *pw = authctxt->pw;
	auth_session_t *as;
	static int expire_checked = 0;

	as = auth_usercheck(pw->pw_name, authctxt->style, "auth-ssh",
	    (char *)password);
	if (as == NULL)
		return (0);
	if (auth_getstate(as) & AUTH_PWEXPIRED) {
		auth_close(as);
		disable_forwarding();
		authctxt->force_pwchange = 1;
		return (1);
	} else {
		if (!expire_checked) {
			expire_checked = 1;
			warn_expiry(authctxt, as);
		}
		return (auth_close(as));
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: auth-passwd.c,v 1.45 2016/07/21 01:39:35 dtucker Exp $ */
2			/*
3			* Author: Tatu Ylonen <ylo@cs.hut.fi>
4			* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5			* All rights reserved
6			* Password authentication. This file contains the functions to check whether
7			* the password is valid for the user.
8			*
9			* As far as I am concerned, the code I have written for this software
10			* can be used freely for any purpose. Any derived versions of this
11			* software must be clearly marked as such, and if the derived work is
12			* incompatible with the protocol description in the RFC file, it must be
13			* called by a name other than "ssh" or "Secure Shell".
14			*
15			* Copyright (c) 1999 Dug Song. All rights reserved.
16			* Copyright (c) 2000 Markus Friedl. All rights reserved.
17			*
18			* Redistribution and use in source and binary forms, with or without
19			* modification, are permitted provided that the following conditions
20			* are met:
21			* 1. Redistributions of source code must retain the above copyright
22			* notice, this list of conditions and the following disclaimer.
23			* 2. Redistributions in binary form must reproduce the above copyright
24			* notice, this list of conditions and the following disclaimer in the
25			* documentation and/or other materials provided with the distribution.
26			*
27			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
28			* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
29			* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
30			* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
31			* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
32			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33			* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34			* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35			* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
36			* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37			*/
38
39			#include <sys/types.h>
40
41			#include <login_cap.h>
42			#include <pwd.h>
43			#include <stdio.h>
44			#include <string.h>
45			#include <stdarg.h>
46
47			#include "packet.h"
48			#include "buffer.h"
49			#include "log.h"
50			#include "misc.h"
51			#include "servconf.h"
52			#include "key.h"
53			#include "hostfile.h"
54			#include "auth.h"
55			#include "auth-options.h"
56
57			extern Buffer loginmsg;
58			extern ServerOptions options;
59			int sys_auth_passwd(Authctxt , const char );
60
61			extern login_cap_t *lc;
62
63			#define DAY (24L * 60 * 60) /* 1 day in seconds */
64			#define TWO_WEEKS (2L * 7 * DAY) /* 2 weeks in seconds */
65
66			#define MAX_PASSWORD_LEN 1024
67
68			static void
69			disable_forwarding(void)
70			{
71			no_port_forwarding_flag = 1;
72			no_agent_forwarding_flag = 1;
73			no_x11_forwarding_flag = 1;
74			}
75
76			/*
77			* Tries to authenticate the user using password. Returns true if
78			* authentication succeeds.
79			*/
80			int
81			auth_password(Authctxt authctxt, const char password)
82			{
83			struct passwd * pw = authctxt->pw;
84			int ok = authctxt->valid;
85
86			if (strlen(password) > MAX_PASSWORD_LEN)
87			return 0;
88
89			if (pw->pw_uid == 0 && options.permit_root_login != PERMIT_YES)
90			ok = 0;
91			if (*password == '\0' && options.permit_empty_passwd == 0)
92			return 0;
93			#ifdef KRB5
94			if (options.kerberos_authentication == 1) {
95			int ret = auth_krb5_password(authctxt, password);
96			if (ret == 1 \|\| ret == 0)
97			return ret && ok;
98			/* Fall back to ordinary passwd authentication. */
99			}
100			#endif
101			return (sys_auth_passwd(authctxt, password) && ok);
102			}
103
104			static void
105			warn_expiry(Authctxt authctxt, auth_session_t as)
106			{
107			char buf[256];
108			quad_t pwtimeleft, actimeleft, daysleft, pwwarntime, acwarntime;
109
110			pwwarntime = acwarntime = TWO_WEEKS;
111
112			pwtimeleft = auth_check_change(as);
113			actimeleft = auth_check_expire(as);
114			if (authctxt->valid) {
115			pwwarntime = login_getcaptime(lc, "password-warn", TWO_WEEKS,
116			TWO_WEEKS);
117			acwarntime = login_getcaptime(lc, "expire-warn", TWO_WEEKS,
118			TWO_WEEKS);
119			}
120			if (pwtimeleft != 0 && pwtimeleft < pwwarntime) {
121			daysleft = pwtimeleft / DAY + 1;
122			snprintf(buf, sizeof(buf),
123			"Your password will expire in %lld day%s.\n",
124			daysleft, daysleft == 1 ? "" : "s");
125			buffer_append(&loginmsg, buf, strlen(buf));
126			}
127			if (actimeleft != 0 && actimeleft < acwarntime) {
128			daysleft = actimeleft / DAY + 1;
129			snprintf(buf, sizeof(buf),
130			"Your account will expire in %lld day%s.\n",
131			daysleft, daysleft == 1 ? "" : "s");
132			buffer_append(&loginmsg, buf, strlen(buf));
133			}
134			}
135
136			int
137			sys_auth_passwd(Authctxt authctxt, const char password)
138			{
139			struct passwd *pw = authctxt->pw;
140			auth_session_t *as;
141			static int expire_checked = 0;
142
143			as = auth_usercheck(pw->pw_name, authctxt->style, "auth-ssh",
144			(char *)password);
145			if (as == NULL)
146			return (0);
147			if (auth_getstate(as) & AUTH_PWEXPIRED) {
148			auth_close(as);
149			disable_forwarding();
150			authctxt->force_pwchange = 1;
151			return (1);
152			} else {
153			if (!expire_checked) {
154			expire_checked = 1;
155			warn_expiry(authctxt, as);
156			}
157			return (auth_close(as));
158			}
159			}