def testDerCodec(self):
substrate = pem.readBase64fromText(self.pem_text)
layers = {
rfc3852.id_ct_contentInfo: rfc3852.ContentInfo(),
rfc3852.id_signedData: rfc3852.SignedData(),
rfc6402.id_cct_PKIData: rfc6402.PKIData()
}
getNextLayer = {
rfc3852.id_ct_contentInfo: lambda x: x['contentType'],
rfc3852.id_signedData:
lambda x: x['encapContentInfo']['eContentType'],
rfc6402.id_cct_PKIData: lambda x: None
}
getNextSubstrate = {
rfc3852.id_ct_contentInfo: lambda x: x['content'],
rfc3852.id_signedData: lambda x: x['encapContentInfo']['eContent'],
rfc6402.id_cct_PKIData: lambda x: None
}
alg_oids = (
univ.ObjectIdentifier('1.3.14.3.2.26'),
univ.ObjectIdentifier('1.2.840.113549.1.1.1'),
univ.ObjectIdentifier('1.2.840.113549.1.1.5'),
univ.ObjectIdentifier('1.2.840.113549.1.1.11'),
)
encoded_null = der_encode(univ.Null(""))
next_layer = rfc3852.id_ct_contentInfo
count = 0
while next_layer:
asn1Object, rest = der_decode(substrate,
asn1Spec=layers[next_layer])
assert not rest
assert asn1Object.prettyPrint()
assert der_encode(asn1Object) == substrate
if next_layer == rfc3852.id_signedData:
for d in asn1Object['digestAlgorithms']:
assert d['algorithm'] in alg_oids
assert d['parameters'] == encoded_null
count += 1
for si in asn1Object['signerInfos']:
assert si['digestAlgorithm']['algorithm'] in alg_oids
assert si['digestAlgorithm']['parameters'] == encoded_null
count += 1
assert si['signatureAlgorithm']['algorithm'] in alg_oids
assert si['signatureAlgorithm'][
'parameters'] == encoded_null
count += 1
if next_layer == rfc6402.id_cct_PKIData:
for req in asn1Object['reqSequence']:
cr = req['tcr']['certificationRequest']
assert cr['signatureAlgorithm']['algorithm'] in alg_oids
assert cr['signatureAlgorithm'][
'parameters'] == encoded_null
count += 1
cri_spki = cr['certificationRequestInfo'][
'subjectPublicKeyInfo']
assert cri_spki['algorithm']['algorithm'] in alg_oids
assert cri_spki['algorithm']['parameters'] == encoded_null
count += 1
substrate = getNextSubstrate[next_layer](asn1Object)
next_layer = getNextLayer[next_layer](asn1Object)
assert count == 5
def setUp(self):
self.asn1Spec = rfc3852.ContentInfo()