#!/usr/local/bin/perl

# ====================================================================
# Copyright (c) 1995 The Apache Group.  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 acknowledgment:
#    "This product includes software developed by the Apache Group
#    for use in the Apache HTTP server project (http://www.apache.org/)."
#
# 4. The names "Apache Server" and "Apache Group" must not be used to
#    endorse or promote products derived from this software without
#    prior written permission.
#
# 5. Redistributions of any form whatsoever must retain the following
#    acknowledgment:
#    "This product includes software developed by the Apache Group
#    for use in the Apache HTTP server project (http://www.apache.org/)."
#
# THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
# EXPRESSED 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 APACHE GROUP OR
# ITS CONTRIBUTORS 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.
# ====================================================================
#
# This software consists of voluntary contributions made by many
# individuals on behalf of the Apache Group and was originally based
# on public domain software written at the National Center for
# Supercomputing Applications, University of Illinois, Urbana-Champaign.
# For more information on the Apache Group and the Apache HTTP server
# project, please see <http://www.apache.org/>.


# usage: dbmmanage <DBMfile> <command> <key> <value> <group>
#
# commands: add, delete, view, adduser
#
# no values needed for delete, no keys or values needed for view.
# to change a value, simply use "add".
# adduser encrypts the password:
# dbmmanage <dbm file> adduser <person> <password>
#
# <group> is optional, and may also be supplied to add the user
# to a specified group:
# dbmmanage <dbm file> adduser <person> <password> <group>

if (scalar(@ARGV) < 2) {
	print "Too few arguments.\n";
	exit;
}

# ugly - this should be changed to be random.
$salt="XX";
$file=$ARGV[0];
$command=$ARGV[1];
$key=$ARGV[2];
$value=$ARGV[3];
$group=$ARGV[4];

if ($command eq "add") {
        dbmopen(%DB, $file, 0664) || die "Error: $!\n";
        $value .= ":$group" if $group ne "";
        $DB{$key} = $value;
        dbmclose(%DB);
	print "Entry $key added with value $value.\n";
	exit;
}

if ($command eq "adduser") {
	$hash = crypt($value, "$salt");
        dbmopen(%DB, $file, 0664) || die "Error: $!\n";
        $hash .= ":$group" if $group ne "";
        $value .= ":$group" if $group ne "";
        $DB{$key} = $hash;
        dbmclose(%DB);
	print "User $key added with password $value, encrypted to $hash\n";
	exit;
}

if ($command eq "delete") {
        dbmopen(%DB, $file, 0664) || die "Error: $!\n";
        delete($DB{$key});
        dbmclose(%DB);
	exit;
}

if ($command eq "view") {
        dbmopen(%DB, $file, undef) || die "Error: $!\n";
        $return_status = 1;
        unless ($key) {
                while (($nkey,$val) = each %DB) {
                        print "$nkey = $val\n";
                }
        } else {
                $return_status = 0 if defined $DB{$key};
                print "$key = $DB{$key}\n";
        } 
        dbmclose(%DB);
	exit($return_status);
}

print "Command unrecognized - must be one of: view, add, adduser, delete.\n";