Scott Kitterman
61 lines
2.1 KiB
Python
61 lines
2.1 KiB
Python
#!/usr/bin/env python
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# This software is provided 'as-is', without any express or implied
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# warranty. In no event will the author be held liable for any damages
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# arising from the use of this software.
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#
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# Permission is granted to anyone to use this software for any purpose,
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# including commercial applications, and to alter it and redistribute it
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# freely, subject to the following restrictions:
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#
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# 1. The origin of this software must not be misrepresented; you must not
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# claim that you wrote the original software. If you use this software
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# in a product, an acknowledgment in the product documentation would be
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# appreciated but is not required.
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# 2. Altered source versions must be plainly marked as such, and must not be
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# misrepresented as being the original software.
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# 3. This notice may not be removed or altered from any source distribution.
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#
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# Copyright (c) 2008 Greg Hewgill http://hewgill.com
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#
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# This has been modified from the original software.
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# Copyright (c) 2011 William Grant <me@williamgrant.id.au>
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from __future__ import print_function
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import sys
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import argparse
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import dkim
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def main():
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parser = argparse.ArgumentParser(
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description='Verify DKIM signature for email messages.',
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epilog="message to be verified follows commands on stdin")
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parser.add_argument('--index', metavar='N', type=int, default=0,
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help='Index of DKIM signature header to verify: default=0')
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parser.add_argument('-v', '--verbose', default=False, action='store_true',
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help='Add some debugging output')
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args=parser.parse_args()
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if sys.version_info[0] >= 3:
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# Make sys.stdin a binary stream.
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sys.stdin = sys.stdin.detach()
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message = sys.stdin.read()
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verbose = args.verbose
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if verbose:
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import logging
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logging.basicConfig(level=logging.DEBUG)
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d = dkim.DKIM(message, logger=logging)
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else:
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d = dkim.DKIM(message)
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res = d.verify(args.index)
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if not res:
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print("signature verification failed")
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sys.exit(1)
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print("signature ok")
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if __name__ == "__main__":
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main()
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