#! /usr/bin/env ruby

require 'gpgmime.rb'

def help

	infostr = <<INFO

gpgmime - GnuPG encryption and decryption for MIME messages

This application is used for encryption and decryption of

GPG/Mime encoded email. It receives the complete MIME

message consisted out of mail header and MIME formated

content from standard input and writes the encoded respectively

decoded result to standard output.

Invocation: gpgmime [option] [passphrase]

options:

decode:             decrypts GPG encoded input stream respectively 

                    checks GPG clear text signature. This is the 

                    default option. Passphrase is required as 2nd

                    argument.

encrypt:            encrypts input stream to GPG/Mime message format.

                    Uses all recipients declared in Mime header for

                    encryption. Pay attention that BCC recipients

                    are not included within Mime-header.

encrypt_and_sign:   same as encrypt but the message is signed in

                    addition. Requires passphrase as 2nd argument.

clear_sign:         generates a clear text signature in GPG/Mime

                    message format. Requires passphrase as 2nd

                    argument.

(C) 2009/09, GNU-General-Public-Licence, Author: Otto Linnemann

INFO

		puts infostr

end

result_code = 0

if ARGV.length < 1 || ARGV.length > 2

    help

else

    mimeParser = GpgMime.new

	option = ""

	passphrase = ""

	if ARGV.length == 2

		option 		= ARGV[0]

		passphrase 	= ARGV[1]

	else

		option = "decode"

		passphrase 	= ARGV[0]

	end	

    if mimeParser.respond_to? :"#{option}"

		mimeParser.read_next_message( $stdin )

       gpg_error_msg = mimeParser.send( :"#{option}", passphrase ) 

		if gpg_error_msg.length == 0

			puts mimeParser.getMessage

		else

			STDERR.puts gpg_error_msg

			result_code = -1

		end

    else

        $stderr.puts "method #{option} undefined error!"

    end

end

exit result_code

__END__