def decode_signature_policy_envelope(signature_policy_envelope_bytes):
"""Decodes signature policy envelope bytes
Args:
signature_policy_envelope_bytes (str): Serialized signature envelope
Returns: deserialized signature policy envelope contents.
"""
signature_policy_envelope = {}
proto_signature_policy_envelope = policies_pb2.SignaturePolicyEnvelope()
proto_signature_policy_envelope.ParseFromString(
signature_policy_envelope_bytes)
signature_policy_envelope['version'] = \
decode_version(proto_signature_policy_envelope.version)
signature_policy_envelope['rule'] = \
decode_signature_policy(proto_signature_policy_envelope.rule)
identities = []
proto_identities = proto_signature_policy_envelope.identities
if proto_identities:
for identity in proto_identities:
msp_principal = decode_MSP_principal(identity)
identities.append(msp_principal)
signature_policy_envelope['identities'] = identities
return signature_policy_envelope
def _build_policy(self, policy, msps=None, returnProto=False):
proto_signature_policy_envelope = \
policies_pb2.SignaturePolicyEnvelope()
if policy:
self._check_policy(policy)
proto_signature_policy_envelope.version = 0
proto_signature_policy_envelope.rule.CopyFrom(
self._get_policy(policy['policy']))
proto_signature_policy_envelope.identities.extend(
[self._build_principal(x) for x in policy['identities']])
else:
# TODO need to support MSPManager
# no policy was passed in, construct a 'Signed By any member
# of an organization by mspid' policy
# construct a list of msp principals to select from using the
# 'n out of' operator
# for not making it fail with current code
return proto_b('')
principals = []
signedBys = []
index = 0
if msps is None:
msps = []
for msp in msps:
onePrn = msp_principal_pb2.MSPPrincipal()
onePrn.principal_classification = \
msp_principal_pb2.MSPPrincipal.ROLE
memberRole = msp_principal_pb2.MSPRole()
memberRole.role = msp_principal_pb2.MSPRole.MEMBER
memberRole.msp_identifier = msp
onePrn.principal = memberRole.SerializeToString()
principals.append(onePrn)
signedBy = policies_pb2.SignaturePolicy()
index += 1
signedBy.signed_by = index
signedBys.append(signedBy)
if len(principals) == 0:
raise Exception('Verifying MSPs not found in the'
' channel object, make sure'
' "initialize()" is called first.')
oneOfAny = policies_pb2.SignaturePolicy.NOutOf()
oneOfAny.n = 1
oneOfAny.rules.extend(signedBys)
noutof = policies_pb2.SignaturePolicy()
noutof.n_out_of.CopyFrom(oneOfAny)
proto_signature_policy_envelope.version = 0
proto_signature_policy_envelope.rule.CopyFrom(noutof)
proto_signature_policy_envelope.identities.extend(principals)
if returnProto:
return proto_signature_policy_envelope
return proto_signature_policy_envelope.SerializeToString()