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#
# This file is part of pyasn1-modules software.
#
# Created by Russ Housley
# Copyright (c) 2019, Vigil Security, LLC
# License: http://snmplabs.com/pyasn1/license.html
#
import sys
from pyasn1.type import univ
from pyasn1.codec.der.decoder import decode as der_decode
from pyasn1.codec.der.encoder import encode as der_encode
from pyasn1_modules import pem
from pyasn1_modules import rfc5652
from pyasn1_modules import rfc7508
try:
import unittest2 as unittest
except ImportError:
import unittest
class SignedMessageTestCase(unittest.TestCase):
signed_message_pem_text = """\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"""
def setUp(self):
self.asn1Spec = rfc5652.ContentInfo()
def testDerCodec(self):
substrate = pem.readBase64fromText(self.signed_message_pem_text)
asn1Object, rest = der_decode (substrate, asn1Spec=self.asn1Spec)
assert not rest
assert asn1Object.prettyPrint()
assert der_encode(asn1Object) == substrate
secure_header_field_attr_found = False
assert asn1Object['contentType'] == rfc5652.id_signedData
sd, rest = der_decode (asn1Object['content'], asn1Spec=rfc5652.SignedData())
for sa in sd['signerInfos'][0]['signedAttrs']:
sat = sa['attrType']
sav0 = sa['attrValues'][0]
if sat == rfc7508.id_aa_secureHeaderFieldsIdentifier:
assert sat in rfc5652.cmsAttributesMap.keys()
sav, rest = der_decode(sav0, asn1Spec=rfc5652.cmsAttributesMap[sat])
assert not rest
assert sav.prettyPrint()
assert der_encode(sav) == sav0
from_field = rfc7508.HeaderFieldName('From')
alice_email = rfc7508.HeaderFieldValue('alice@example.com')
for shf in sav['secHeaderFields']:
if shf['field-Name'] == from_field:
assert shf['field-Value'] == alice_email
secure_header_field_attr_found = True
assert secure_header_field_attr_found
def testOpenTypes(self):
substrate = pem.readBase64fromText(self.signed_message_pem_text)
asn1Object, rest = der_decode(substrate,
asn1Spec=self.asn1Spec, decodeOpenTypes=True)
assert not rest
assert asn1Object.prettyPrint()
assert der_encode(asn1Object) == substrate
assert asn1Object['contentType'] in rfc5652.cmsContentTypesMap.keys()
assert asn1Object['contentType'] == rfc5652.id_signedData
sd = asn1Object['content']
assert sd['version'] == rfc5652.CMSVersion().subtype(value='v1')
ect = sd['encapContentInfo']['eContentType']
assert ect in rfc5652.cmsContentTypesMap.keys()
assert ect == rfc5652.id_data
for sa in sd['signerInfos'][0]['signedAttrs']:
if sa['attrType'] == rfc7508.id_aa_secureHeaderFieldsIdentifier:
assert sa['attrType'] in rfc5652.cmsAttributesMap.keys()
secure_header_field_attr_found = False
for sa in sd['signerInfos'][0]['signedAttrs']:
if sa['attrType'] == rfc7508.id_aa_secureHeaderFieldsIdentifier:
assert sa['attrType'] in rfc5652.cmsAttributesMap.keys()
from_field = rfc7508.HeaderFieldName('From')
alice_email = rfc7508.HeaderFieldValue('alice@example.com')
for shf in sa['attrValues'][0]['secHeaderFields']:
if shf['field-Name'] == from_field:
assert shf['field-Value'] == alice_email
secure_header_field_attr_found = True
assert secure_header_field_attr_found
suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
if __name__ == '__main__':
import sys
result = unittest.TextTestRunner(verbosity=2).run(suite)
sys.exit(not result.wasSuccessful())
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