File: dkimverify.py

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dkimpy 0.5.4-1
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#!/usr/bin/env python

# This software is provided 'as-is', without any express or implied
# warranty.  In no event will the author be held liable for any damages
# arising from the use of this software.
#
# Permission is granted to anyone to use this software for any purpose,
# including commercial applications, and to alter it and redistribute it
# freely, subject to the following restrictions:
#
# 1. The origin of this software must not be misrepresented; you must not
#    claim that you wrote the original software. If you use this software
#    in a product, an acknowledgment in the product documentation would be
#    appreciated but is not required.
# 2. Altered source versions must be plainly marked as such, and must not be
#    misrepresented as being the original software.
# 3. This notice may not be removed or altered from any source distribution.
#
# Copyright (c) 2008 Greg Hewgill http://hewgill.com
#
# This has been modified from the original software.
# Copyright (c) 2011 William Grant <me@williamgrant.id.au>

from __future__ import print_function

import sys

import dkim

if sys.version_info[0] >= 3:
    # Make sys.stdin a binary stream.
    sys.stdin = sys.stdin.detach()

message = sys.stdin.read()
verbose = '-v' in sys.argv
if verbose:
  d = dkim.DKIM(message)
  res = d.verify()
else:
  res = dkim.verify(message)
if not res:
    print("signature verification failed")
    sys.exit(1)
print("signature ok")