#!/bin/sh
#
# This shell script will generate an X509 certificate for
# your gnunet-transport HTTPS
#
# The current version partially reuses and recycles
# code from build.sh by NetBSD (although not entirely
# used because it needs debugging):
#
# Copyright (c) 2001-2011 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to
# The NetBSD Foundation by Todd Vierling and Luke Mewburn.

# 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 NETBSD FOUNDATION, INC. AND
# CONTRIBUTORS ``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 FOUNDATION OR 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.

progname=${0##*/}

existence() {
  command -v "$1" >/dev/null 2>&1
}

setdefaults()
{
    verbosity=0
    runcmd=
}

statusmsg()
{
    ${runcmd} echo "    $@"
}

infomsg()
{
    if [ x$verbosity = x1 ]; then
        statusmsg "INFO: $@"
    fi
}

warningmsg()
{
    statusmsg "WARNING: $@"
}

errormsg()
{
    statusmsg "ERROR: $@"
}

linemsg()
{
    statusmsg "========================================="
}


usage()
{
    if [ -n "$*" ]; then
        echo ""
        echo "${progname}: $*"
    fi
    cat <<_usage_

Usage: ${progname} [-hv] [-c FILE] [...]

Options:
   -c FILE	Use the configuration file FILE.
   -h		Print this help message.
   -v		Print the version and exit.
   -V           be verbose

_usage_
	exit 1
}


generate_cert_key()
{
    echo ""
    infomsg "Generating Cert and Key"

    CERTTOOL=""
    GNUTLS_CA_TEMPLATE=@PKGDATADIRECTORY@/gnunet-gns-proxy-ca.template
    OPENSSL=0
    if test -x $(existence gnutls-certtool)
    #if test -z "`gnutls-certtool --version`" > /dev/null
    then
      if test -z "`certtool --version | grep gnutls`" > /dev/null
      then
        warningmsg "'gnutls-certtool' or 'certtool' command not found. Trying openssl."
        # if test -z "`openssl version`" > /dev/null
        if test -x $(existence openssl)
        then
          OPENSSL=1
        else
          warningmsg "Install either gnutls certtool or openssl for certificate generation!"
          statusmsg  "Cleaning up."
          exit 1
        fi
      fi
      CERTTOOL="certtool"
    else
      CERTTOOL="gnutls-certtool"
    fi
    mkdir -p `dirname $KEYFILE`

    if test 1 -eq $OPENSSL
    then
      openssl genrsa -out $KEYFILE 1024
      openssl req -batch -days 365 -out $CERTFILE -new -x509 -key $KEYFILE
    else
      $CERTTOOL --generate-privkey --outfile $KEYFILE 2>/dev/null
      $CERTTOOL --template $GNUTLS_CA_TEMPLATE --generate-self-signed --load-privkey $KEYFILE --outfile $CERTFILE 2>/dev/null
    fi
  }

print_version()
{
  GNUNET_ARM_VERSION=`gnunet-arm -v`
  echo $GNUNET_ARM_VERSION
}

main()
{
  KEYFILE=$1
  CERTFILE=$2
  setdefaults
  generate_cert_key
}

main "$@"
