| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455 |
- #!/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 PKCS#7 on stdin, parse it 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 rfc2315
- if len(sys.argv) != 1:
- print("""Usage:
- $ cat pkcs7Certificate.pem | %s""" % sys.argv[0])
- sys.exit(-1)
- idx, substrate = pem.readPemBlocksFromFile(
- sys.stdin, ('-----BEGIN PKCS7-----', '-----END PKCS7-----')
- )
- assert substrate, 'bad PKCS7 data on input'
- contentInfo, rest = decoder.decode(substrate, asn1Spec=rfc2315.ContentInfo())
- if rest:
- substrate = substrate[:-len(rest)]
- print(contentInfo.prettyPrint())
- assert encoder.encode(contentInfo) == substrate, 're-encode fails'
- contentType = contentInfo.getComponentByName('contentType')
- contentInfoMap = {
- (1, 2, 840, 113549, 1, 7, 1): rfc2315.Data(),
- (1, 2, 840, 113549, 1, 7, 2): rfc2315.SignedData(),
- (1, 2, 840, 113549, 1, 7, 3): rfc2315.EnvelopedData(),
- (1, 2, 840, 113549, 1, 7, 4): rfc2315.SignedAndEnvelopedData(),
- (1, 2, 840, 113549, 1, 7, 5): rfc2315.DigestedData(),
- (1, 2, 840, 113549, 1, 7, 6): rfc2315.EncryptedData()
- }
- content, _ = decoder.decode(
- contentInfo.getComponentByName('content'),
- asn1Spec=contentInfoMap[contentType]
- )
- print(content.prettyPrint())
|