#!/usr/bin/env python
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#
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# This file is part of pyasn1-modules software.
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#
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# Copyright (c) 2005-2017, Ilya Etingof <etingof@gmail.com>
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# License: http://pyasn1.sf.net/license.html
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#
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# Read bunch of ASN.1/PEM plain/encrypted private keys in PKCS#8
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# format on stdin, parse each into plain text, then build substrate from it
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#
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import sys
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from pyasn1.codec.der import decoder
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from pyasn1.codec.der import encoder
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from pyasn1_modules import pem
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from pyasn1_modules import rfc5208
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if len(sys.argv) != 1:
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print("""Usage:
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$ cat pkcs8key.pem | %s""" % sys.argv[0])
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sys.exit(-1)
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cnt = 0
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while True:
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idx, substrate = pem.readPemBlocksFromFile(
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sys.stdin,
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('-----BEGIN PRIVATE KEY-----', '-----END PRIVATE KEY-----'),
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('-----BEGIN ENCRYPTED PRIVATE KEY-----', '-----END ENCRYPTED PRIVATE KEY-----')
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)
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if not substrate:
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break
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if idx == 0:
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asn1Spec = rfc5208.PrivateKeyInfo()
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elif idx == 1:
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asn1Spec = rfc5208.EncryptedPrivateKeyInfo()
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else:
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break
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key, rest = decoder.decode(substrate, asn1Spec=asn1Spec)
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if rest:
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substrate = substrate[:-len(rest)]
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print(key.prettyPrint())
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assert encoder.encode(key) == substrate, 'pkcs8 recode fails'
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cnt += 1
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print('*** %s PKCS#8 key(s) de/serialized' % cnt)
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