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- #!/usr/bin/env python
- #
- # This file is part of pyasn1-modules software.
- #
- # Copyright (c) 2005-2019, Ilya Etingof <etingof@gmail.com>
- # License: http://snmplabs.com/pyasn1/license.html
- #
- # Read ASN.1/PEM X.509 certificates on stdin, parse each into plain text,
- # then build substrate from it
- #
- import sys
- from pyasn1.codec.der import decoder
- from pyasn1.codec.der import encoder
- from pyasn1_modules import pem
- from pyasn1_modules import rfc2459
- if len(sys.argv) != 1:
- print("""Usage:
- $ cat CACertificate.pem | %s
- $ cat userCertificate.pem | %s""" % (sys.argv[0], sys.argv[0]))
- sys.exit(-1)
- certType = rfc2459.Certificate()
- certCnt = 0
- while True:
- idx, substrate = pem.readPemBlocksFromFile(
- sys.stdin, ('-----BEGIN CERTIFICATE-----',
- '-----END CERTIFICATE-----')
- )
- if not substrate:
- break
- cert, rest = decoder.decode(substrate, asn1Spec=certType)
- if rest:
- substrate = substrate[:-len(rest)]
- print(cert.prettyPrint())
- assert encoder.encode(cert) == substrate, 'cert recode fails'
- certCnt += 1
- print('*** %s PEM cert(s) de/serialized' % certCnt)
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