Say "hi" to the latest in the OpenSSH series, version 2.9!

Happy birthday to:	rwatson

1 files changed, 136 insertions, 0 deletions

diff --git a/crypto/openssh/sshlogin.c b/crypto/openssh/sshlogin.c
new file mode 100644
index 000000000000..a8a76c6156d7
--- /dev/null
+++ b/crypto/openssh/sshlogin.c
@@ -0,0 +1,136 @@
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ *                    All rights reserved
+ * This file performs some of the things login(1) normally does.  We cannot
+ * easily use something like login -p -h host -f user, because there are
+ * several different logins around, and it is hard to determined what kind of
+ * login the current system has.  Also, we want to be able to execute commands
+ * on a tty.
+ *
+ * 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 Theo de Raadt.  All rights reserved.
+ * Copyright (c) 1999 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 "includes.h"
+RCSID("$OpenBSD: sshlogin.c,v 1.2 2001/03/24 16:43:27 stevesk Exp $");
+
+#include <util.h>
+#include <utmp.h>
+#include "sshlogin.h"
+#include "log.h"
+
+/*
+ * Returns the time when the user last logged in.  Returns 0 if the
+ * information is not available.  This must be called before record_login.
+ * The host the user logged in from will be returned in buf.
+ */
+
+u_long
+get_last_login_time(uid_t uid, const char *logname,
+		    char *buf, u_int bufsize)
+{
+	struct lastlog ll;
+	char *lastlog;
+	int fd;
+
+	lastlog = _PATH_LASTLOG;
+	buf[0] = '\0';
+
+	fd = open(lastlog, O_RDONLY);
+	if (fd < 0)
+		return 0;
+	lseek(fd, (off_t) ((long) uid * sizeof(ll)), SEEK_SET);
+	if (read(fd, &ll, sizeof(ll)) != sizeof(ll)) {
+		close(fd);
+		return 0;
+	}
+	close(fd);
+	if (bufsize > sizeof(ll.ll_host) + 1)
+		bufsize = sizeof(ll.ll_host) + 1;
+	strncpy(buf, ll.ll_host, bufsize - 1);
+	buf[bufsize - 1] = 0;
+	return ll.ll_time;
+}
+
+/*
+ * Records that the user has logged in.  I these parts of operating systems
+ * were more standardized.
+ */
+
+void
+record_login(pid_t pid, const char *ttyname, const char *user, uid_t uid,
+	     const char *host, struct sockaddr * addr)
+{
+	int fd;
+	struct lastlog ll;
+	char *lastlog;
+	struct utmp u;
+
+	/* Construct an utmp/wtmp entry. */
+	memset(&u, 0, sizeof(u));
+	strncpy(u.ut_line, ttyname + 5, sizeof(u.ut_line));
+	u.ut_time = time(NULL);
+	strncpy(u.ut_name, user, sizeof(u.ut_name));
+	strncpy(u.ut_host, host, sizeof(u.ut_host));
+
+	login(&u);
+	lastlog = _PATH_LASTLOG;
+
+	/* Update lastlog unless actually recording a logout. */
+	if (strcmp(user, "") != 0) {
+		/*
+		 * It is safer to bzero the lastlog structure first because
+		 * some systems might have some extra fields in it (e.g. SGI)
+		 */
+		memset(&ll, 0, sizeof(ll));
+
+		/* Update lastlog. */
+		ll.ll_time = time(NULL);
+		strncpy(ll.ll_line, ttyname + 5, sizeof(ll.ll_line));
+		strncpy(ll.ll_host, host, sizeof(ll.ll_host));
+		fd = open(lastlog, O_RDWR);
+		if (fd >= 0) {
+			lseek(fd, (off_t) ((long) uid * sizeof(ll)), SEEK_SET);
+			if (write(fd, &ll, sizeof(ll)) != sizeof(ll))
+				log("Could not write %.100s: %.100s", lastlog, strerror(errno));
+			close(fd);
+		}
+	}
+}
+
+/* Records that the user has logged out. */
+
+void
+record_logout(pid_t pid, const char *ttyname)
+{
+	const char *line = ttyname + 5;	/* /dev/ttyq8 -> ttyq8 */
+	if (logout(line))
+		logwtmp(line, "", "");
+}