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#!/usr/bin/env python
# coding: utf-8
#
# This file is part of pyasn1-modules software.
#
# Created by Stanisław Pitucha with asn1ate tool.
# Copyright (c) 2005-2017, Ilya Etingof <etingof@gmail.com>
# License: http://pyasn1.sf.net/license.html
#
# Read ASN.1/PEM X.509 certificates on stdin, parse each into plain text,
# then build substrate from it (using RFC5280)
#
import sys
from pyasn1.codec.der import decoder
from pyasn1.codec.der import encoder
from pyasn1_modules import pem
from pyasn1_modules import rfc5280
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 = rfc5280.Certificate()
certCnt = 0
while 1:
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)