#!/usr/bin/env python

# decrypt.py - decrypt an encrypted message, given as ascii armored stuff
#   on stdin
#
# Encrypted message could be created with simple.py, e.g.
# If "gpgsm --decrypt ; echo" groks it, this script should grok it.
#
# Apart from setting up your keys and certificates, this generally needs:
#
#  export GPG_TTY=`tty`
#  eval `gpg-agent --daemon --use-standard-socket`
#
# ascii armored stuff generally has a leading line
#  -----BEGIN ENCRYPTED MESSAGE-----

# based upon: $Id: simple.py,v 1.4 2005/05/17 16:49:28 belyi Exp $
# Copyright (C) 2005 Igor Belyi <belyi@users.sourceforge.net>
# Copyright (C) 2002 John Goerzen <jgoerzen@complete.org>
#
#    This program 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.
#
#    This program 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 this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import sys
from pyme import core, constants, errors
import pyme.constants.validity

# Set up our input and output buffers.
plain = core.Data()
cipher = core.Data(sys.stdin.read())

# Initialize our context.
c = core.Context()
c.set_armor(1)
c.set_protocol(pyme.util.gpgme.GPGME_PROTOCOL_CMS)

# Do the decryption.
try:
    c.op_decrypt(cipher, plain)
    plain.seek(0,0)
    print plain.read()
except errors.GPGMEError, ex:
    print ex.getstring()