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