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41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
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#!/usr/bin/python
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#
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# Read ASN.1/PEM X.509 certificates on stdin, parse each into plain text,
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# then build substrate from it
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#
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from pyasn1.codec.der import decoder, encoder
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from pyasn1_modules import rfc2459, pem
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import sys
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if len(sys.argv) != 1:
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print("""Usage:
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$ cat CACertificate.pem | %s
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$ cat userCertificate.pem | %s""" % (sys.argv[0], sys.argv[0]))
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sys.exit(-1)
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certType = rfc2459.Certificate()
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certCnt = 0
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while 1:
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idx, substrate = pem.readPemBlocksFromFile(
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sys.stdin, ('-----BEGIN CERTIFICATE-----',
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'-----END CERTIFICATE-----')
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)
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if not substrate:
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break
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cert, rest = decoder.decode(substrate, asn1Spec=certType)
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if rest: substrate = substrate[:-len(rest)]
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print(cert.prettyPrint())
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assert encoder.encode(cert, defMode=False) == substrate or \
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encoder.encode(cert, defMode=True) == substrate, \
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'cert recode fails'
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certCnt = certCnt + 1
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print('*** %s PEM cert(s) de/serialized' % certCnt)
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