def from_der(cls, derData):
"""Decodes certificate.
@param derData: DER-encoded pkcs7
@returns: PKCS7 structure (tree).
"""
asn1 = decode(derData, asn1Spec=cls.asn1Spec)
return cls(asn1[0])
def __init__(self, extension):
self.id = tuple_to_OID(extension.getComponentByName("extnID"))
critical = extension.getComponentByName("critical")
self.is_critical = (critical != 0)
self.ext_type = None
# set the bytes as the extension value
self.value = extension.getComponentByName("extnValue")._value
# if we know the type of value, parse it
decoderTuple = Extension._extensionDecoders.get(self.id)
if decoderTuple is not None:
try:
(decoderAsn1Spec, decoderFunction, extType) = decoderTuple
v = decode(self.value, asn1Spec=decoderAsn1Spec)[0]
self.value = decoderFunction(v)
self.ext_type = extType
except PyAsn1Error:
#According to RFC 5280, unrecognized extension can be ignored
#unless marked critical, though it doesn't cover all cases.
if self.is_critical:
raise
elif self.is_critical:
raise CertificateError("Critical extension OID %s not understood" %
self.id)
def from_der(cls, derData):
"""Decodes certificate.
@param derData: DER-encoded pkcs7
@returns: PKCS7 structure (tree).
"""
asn1 = decode(derData, asn1Spec=cls.asn1Spec)
return cls(asn1[0])
def x509_parse(derData): """Decodes certificate. @param derData: DER-encoded certificate string @returns: pkcs7_models.X509Certificate """ cert = decode(derData, asn1Spec=Certificate())[0] x509cert = X509Certificate(cert) return x509cert
def x509_parse(derData):
"""Decodes certificate.
@param derData: DER-encoded certificate string
@returns: pkcs7_models.X509Certificate
"""
cert = decode(derData, asn1Spec=Certificate())[0]
x509cert = X509Certificate(cert)
return x509cert
def decode_qts(qts_bytes):
'''
Decodes qualified timestamp
'''
qts = Qts()
decoded = decode(qts_bytes,asn1Spec=qts)
qts = decoded[0]
return qts
def decode_tst(tst_bytes):
'''
Decodes Timestamp Token
'''
tst = TSTInfo()
decoded = decode(tst_bytes,asn1Spec=tst)
tst = decoded[0]
return tst
def decode_qts(qts_bytes):
'''
Decodes qualified timestamp
'''
qts = Qts()
decoded = decode(qts_bytes, asn1Spec=qts)
qts = decoded[0]
return qts
def decode_tst(tst_bytes):
'''
Decodes Timestamp Token
'''
tst = TSTInfo()
decoded = decode(tst_bytes, asn1Spec=tst)
tst = decoded[0]
return tst
def decode_msg(message):
'''
Decodes message in DER encoding.
Returns ASN1 message object
'''
# create template for decoder
msg = Message()
# decode pkcs signed message
mess_obj = StringIO(message)
mess_view = StringView(mess_obj, 0, len(message))
decoded = decode(mess_view, asn1Spec=msg)
message = decoded[0]
return message
def decode_msg(message):
'''
Decodes message in DER encoding.
Returns ASN1 message object
'''
# create template for decoder
msg = Message()
# decode pkcs signed message
mess_obj = StringIO(message)
mess_view = StringView(mess_obj, 0, len(message))
decoded = decode(mess_view, asn1Spec=msg)
message = decoded[0]
return message
def __init__(self, extension):
self.id = tuple_to_OID(extension.getComponentByName("extnID"))
critical = extension.getComponentByName("critical")
self.is_critical = (critical != 0)
self.ext_type = None
# set the bytes as the extension value
self.value = extension.getComponentByName("extnValue")._value
# if we know the type of value, parse it
decoderTuple = Extension._extensionDecoders.get(self.id)
if decoderTuple is not None:
try:
(decoderAsn1Spec, decoderFunction, extType) = decoderTuple
v = decode(self.value, asn1Spec=decoderAsn1Spec)[0]
self.value = decoderFunction(v)
self.ext_type = extType
except PyAsn1Error:
#According to RFC 5280, unrecognized extension can be ignored
#unless marked critical, though it doesn't cover all cases.
if self.is_critical:
raise
