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# SignedFile -*- mode: python; coding: utf-8 -*-
# SignedFile offers a subset of file object operations, and is
# designed to transparently handle files with PGP signatures.
# Copyright © 2002 Colin Walters <walters@gnu.org>
#
# This file 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 re,string
class SignedFile:
_stream = None
_eof = 0
_signed = 0
_signature = None
_signatureversion = None
_initline = None
def __init__(self, stream):
self._stream = stream
line = stream.readline()
if (line == "-----BEGIN PGP SIGNED MESSAGE-----\n"):
self._signed = 1
while (1):
line = stream.readline()
if (len(line) == 0 or line == '\n'):
break
else:
self._initline = line
def readline(self):
if self._eof:
return ''
if self._initline:
line = self._initline
self._initline = None
else:
line = self._stream.readline()
if not self._signed:
return line
elif line == "-----BEGIN PGP SIGNATURE-----\n":
self._eof = 1
self._signature = []
self._signatureversion = self._stream.readline()
self._stream.readline() # skip blank line
while 1:
line = self._stream.readline()
if len(line) == 0 or line == "-----END PGP SIGNATURE-----\n":
break
self._signature.append(line)
self._signature = string.join
return ''
return line
def readlines(self):
ret = []
while 1:
line = self.readline()
if (line != ''):
ret.append(line)
else:
break
return ret
def close(self):
self._stream.close()
def getSigned(self):
return self._signed
def getSignature(self):
return self._signature
def getSignatureVersion(self):
return self._signatureversion
if __name__=="__main__":
import sys
if len(sys.argv) == 0:
print "Need one file as an argument"
sys.exit(1)
filename = sys.argv[1]
f=SignedFile(open(filename))
if f.getSigned():
print "**** SIGNED ****"
else:
print "**** NOT SIGNED ****"
lines=f.readlines()
print lines
if not f.getSigned():
assert(len(lines) == len(actuallines))
else:
print "Signature: %s" % (f.getSignature())
# vim:ts=4:sw=4:et:
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