passwd login script; authenticates the user via passwd/yp

will be used when BSD authentication is enabled

3 files changed, 323 insertions, 0 deletions

diff --git a/libexec/login_passwd/Makefile b/libexec/login_passwd/Makefile
new file mode 100644
index 00000000000..793d1cf434b
--- /dev/null
+++ b/libexec/login_passwd/Makefile
@@ -0,0 +1,14 @@
+#	$OpenBSD: Makefile,v 1.1 2000/12/12 02:33:44 millert Exp $
+
+PROG=	login_passwd
+MAN=	login_passwd.8
+DPADD=	${LIBUTIL}
+LDADD=	-lutil
+CFLAGS+=-Wall
+
+BINOWN=	root
+BINGRP=	auth
+BINMODE=4555
+BINDIR=	/usr/libexec/auth
+
+.include <bsd.prog.mk>
diff --git a/libexec/login_passwd/login_passwd.8 b/libexec/login_passwd/login_passwd.8
new file mode 100644
index 00000000000..38470298043
--- /dev/null
+++ b/libexec/login_passwd/login_passwd.8
@@ -0,0 +1,111 @@
+.\" $OpenBSD: login_passwd.8,v 1.1 2000/12/12 02:33:44 millert Exp $
+.\"
+.\" Copyright (c) 2000 Todd C. Miller <Todd.Miller@courtesan.com>
+.\" 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.
+.\" 3. The name of the author may not be used to endorse or promote products
+.\"    derived from this software without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED ``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.
+.\"
+.Dd December 11, 2000
+.Dt LOGIN_PASSWD 8
+.Os
+.Sh NAME
+.Nm login_passwd
+.Nd provide standard password authentication type
+.Sh SYNOPSIS
+.Nm
+.Op Fl s Ar service
+.Op Fl v Ar wheel=yes|no
+.Op Fl v Ar lastchance=yes|no
+.Ar user
+.Op Ar class
+.Sh DESCRIPTION
+.Pp
+The
+.Nm
+utility is called by
+.Xr login 1 ,
+.Xr su 1 ,
+.Xr ftpd 8 ,
+and others to authenticate the
+.Ar user
+with passwd-style authentication.
+.Pp
+The
+.Ar user
+argument is the name of the user to be authenticated.
+If
+.Ar user
+is of the form
+.Ar name. Ns Li root
+and
+.Ar name. Ns Li root
+is not found in the password file, the entry for
+.Li root
+is used.
+This is done to support
+.Xr su 1 ,
+which uses kerberos-style root instances.
+.Pp
+The
+.Ar service
+argument specifies which protocol to use with the
+invoking program.  The allowed protocols are
+.Em login ,
+.Em challenge ,
+and
+.Em response .
+(The
+.Em challenge
+protocol is silently ignored but will report success as passwd-style
+authentication is not challenge-response based).
+.Pp
+If the
+.Ar wheel
+argument is specified and is not set to
+.Dq yes ,
+then the user will be rejected as not being in group
+.Dq wheel .
+This is used by
+.Xr su 1 .
+.Pp
+If the
+.Ar lastchance
+argument is specified and is equal to
+.Dq yes ,
+then if the user's password has expired, and it has not been
+expired longer than
+.Dq password-dead
+seconds (see
+.Xr login.conf 5 ) ,
+the user will be able to log in one last time to change the password.
+.Pp
+.Nm
+will prompt the user for a password and report back to the
+invoking program whether or not the authentication was
+successful.
+.Sh SEE ALSO
+.Xr login 1 ,
+.Xr passwd 1 ,
+.Xr su 1 ,
+.Xr login.conf 5 ,
+.Xr ftpd 8
diff --git a/libexec/login_passwd/login_passwd.c b/libexec/login_passwd/login_passwd.c
new file mode 100644
index 00000000000..647a63d1fe5
--- /dev/null
+++ b/libexec/login_passwd/login_passwd.c
@@ -0,0 +1,198 @@
+/*	$OpenBSD: login_passwd.c,v 1.1 2000/12/12 02:33:44 millert Exp $	*/
+
+/*-
+ * Copyright (c) 1995 Berkeley Software Design, Inc. 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Berkeley Software Design,
+ *      Inc.
+ * 4. The name of Berkeley Software Design, Inc.  may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``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 BERKELEY SOFTWARE DESIGN, INC. 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.
+ *
+ *	BSDI $From: login_passwd.c,v 1.11 1997/08/08 18:58:24 prb Exp $
+ */
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/file.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <errno.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <util.h>
+
+#include <login_cap.h>
+#include <bsd_auth.h>
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	FILE *back;
+	char *class, *instance, *p, *salt, *username, *wheel;
+	char response[1024];
+	int c, mode, lastchance;
+	struct passwd *pwd;
+	struct rlimit rl;
+
+	class = NULL;
+	username = NULL;
+	wheel = NULL;
+	mode = 0;
+	p = NULL;
+	lastchance = 0;
+
+	rl.rlim_cur = 0;
+	rl.rlim_max = 0;
+	(void)setrlimit(RLIMIT_CORE, &rl);
+
+	(void)signal(SIGQUIT, SIG_IGN);
+	(void)signal(SIGINT, SIG_IGN);
+	(void)setpriority(PRIO_PROCESS, 0, 0);
+
+	openlog("login", LOG_ODELAY, LOG_AUTH);
+
+	back = NULL;
+	while ((c = getopt(argc, argv, "dv:s:")) != -1)
+		switch(c) {
+		case 'd':
+			back = stdout;
+			break;
+		case 'v':
+			if (strncmp(optarg, "wheel=", 6) == 0)
+				wheel = optarg + 6;
+			else if (strncmp(optarg, "lastchance=", 10) == 0)
+				lastchance = (strcmp(optarg + 10, "yes") == 0);
+			break;
+		case 's':	/* service */
+			if (strcmp(optarg, "login") == 0)
+				mode = 0;
+			else if (strcmp(optarg, "challenge") == 0)
+				mode = 1;
+			else if (strcmp(optarg, "response") == 0)
+				mode = 2;
+			else {
+				syslog(LOG_ERR, "%s: invalid service", optarg);
+				exit(1);
+			}
+			break;
+		default:
+			syslog(LOG_ERR, "usage error");
+			exit(1);
+		}
+
+	switch(argc - optind) {
+	case 2:
+		class = argv[optind + 1];
+	case 1:
+		username = argv[optind];
+		break;
+	default:
+		syslog(LOG_ERR, "usage error");
+		exit(1);
+	}
+
+	/*
+	 * .root instances in passwd is just the root account.
+	 * all other instances will fail.
+	 * make a special check to see if there really is an
+	 * account named user.root.
+	 */
+	if ((pwd = getpwnam(username)) == NULL) {
+		instance = strchr(username, '.');
+		if (instance && strcmp(instance+1, "root") == 0) {
+			*instance++ = 0;
+			if ((pwd = getpwnam(username)) == NULL || pwd->pw_uid)
+				username = instance;
+		}
+		pwd = getpwnam(username);
+	}
+
+	if (back == NULL && (back = fdopen(3, "r+")) == NULL) {
+		syslog(LOG_ERR, "reopening back channel: %m");
+		exit(1);
+	}
+	if (wheel != NULL && strcmp(wheel, "yes") != 0) {
+		fprintf(back, BI_VALUE " errormsg %s\n",
+		    auth_mkvalue("you are not in group wheel"));
+		fprintf(back, BI_REJECT "\n");
+		exit(1);
+	}
+
+	if (pwd && *pwd->pw_passwd == '\0') {
+		fprintf(back, BI_AUTH "\n");
+		exit(0);
+	}
+
+	if (mode == 1) {
+		fprintf(back, BI_SILENT "\n");
+		exit(0);
+	}
+
+	if (pwd)
+		salt = pwd->pw_passwd;
+	else
+		salt = "xx";
+
+	(void)setpriority(PRIO_PROCESS, 0, -4);
+
+	if (mode == 2) {
+		mode = 0;
+		c = -1;
+		while (++c < sizeof(response) &&
+		    read(3, &response[c], 1) == 1) {
+			if (response[c] == '\0' && ++mode == 2)
+				break;
+			if (response[c] == '\0' && mode == 1)
+				p = response + c + 1;
+		}
+		if (mode < 2) {
+			syslog(LOG_ERR, "protocol error on back channel");
+			exit(1);
+		}
+	} else
+		p = getpass("Password:");
+
+	salt = crypt(p, salt);
+	memset(p, 0, strlen(p));
+	if (!pwd || strcmp(salt, pwd->pw_passwd) != 0)
+		exit(1);
+
+	c = login_check_expire(back, pwd, class, lastchance);
+
+	if (c == 0)
+		fprintf(back, BI_AUTH "\n");
+	exit(c);
+}