#!/usr/bin/perl
# The LearningOnline Network
# CrGrant.pl  - Grant a loncapa SSL certificate.
#
# $Id: CrGrant.pl,v 1.1 2004/07/02 10:51:18 foxr Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or 
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#


# http://www.lon-capa.org/
#
# This script operates on a certificate request that has been
# extracted from the attachment sent to the loncapa certificate 
# administrator and:
#
#  1. Creates an ssl certificate corresponding to the request.
#  2. Constructs an installation script that will install
#     the certificate along with the certificate authority's
#     certificate in a loncapa system.
#  3. Constructs an email which contains a cover letter 
#     describing what to do with the attachment, and an
#     attachment that consists of the installation script
#     created in step 2.
#  4. Emails the message to the email address in the certificate
#     request.
#
#  There are some assumptions we need to make in order to
#  get this all to work:
#    - The certificate authority is installed on a 
#      loncapa system with configuration files that specify
#      the same certificate directory and certificate filenames
#      as the target system (otherwise we can't generate the
#      installation script).
#    - The loncapa certificate authority configuration file is
#      $SSLDir/loncapaca.cnf and that it specifies that:
#      o The certificate authority files are in $SSLDir/loncapaca
#      o The certificate authority certificate is in:
#         $SSLDir/loncapaca/cacert.pem
#      o The certificate authority maintains a certificate index file
#        $SSLDIR/loncapaca/index.txt
#      o Only one instance of this script will be run at a time!!!!!
#        (otherwise the last line of the index file may not be the
#         index to our certificate.  We'll do some rudimentary
#         error checking, but have no idea how to recover in case
#         of problems).
#      o The generated certificates are stored in $SSLDIR/loncapaca/certs
#      o The person that runs this script knows the passphrase
#        for the loncapa certificate authority's private key
#        which remains encrypted for security reasons.
#
#

# Import section:

use strict;
use lib '/home/httpd/lib/perl';
use MIME::Entity;
use LONCAPA::Configuration;



# Global variable declarations



# Debug/log support

my $DEBUG=1;

sub Debug {
    my $msg = shift;
    if($DEBUG) {
	print STDERR "$msg\n";
    }
}
#  Support subs:

sub Usage {}

sub CreateCertificate {
    my $RequestFile = shift;

    return 'fox@nscl.msu.edu';   # Stub..
}
sub CreateInstallScript {}

sub CreateEmail {
    return "Dummy message";	# Stub.
}

sub SendEmail {
    my ($EmailAddress, $Message) = @_;
}
sub Cleanup {}


#  Program entry point
#   The usage is:
#     CrGrant.pl    {request_file}
#

my $argc = @ARGV;		# Count number of command parameters.
if($argc != 1) {
    Usage;
    exit -1;
}
my $CertificateRequest = $ARGV[0];

my $EmailAddress = CreateCertificate($CertificateRequest);
CreateInstallScript;
my $Message = CreateEmail;
SendEmail($EmailAddress, $Message);
Cleanup;

# POD documentation.