def main():
# The default Face will connect using a Unix socket, or to "localhost".
face = Face()
# Create an in-memory key chain with default keys.
keyChain = KeyChain("pib-memory:", "tpm-memory:")
keyChain.importSafeBag(
SafeBag(Name("/testname/KEY/123"),
Blob(DEFAULT_RSA_PRIVATE_KEY_DER, False),
Blob(DEFAULT_RSA_PUBLIC_KEY_DER, False)))
face.setCommandSigningInfo(keyChain, keyChain.getDefaultCertificateName())
# Enable Interest loopback so that the EncryptorV2 can fetch Data packets
# from the AccessManagerV2.
face.setInterestLoopbackEnabled(True)
contentPrefix = Name("/testname/content")
contentNamespace = Namespace(contentPrefix, keyChain)
# We know the content has two segments.
metaInfo = MetaInfo()
metaInfo.setFinalBlockId(Name().appendSegment(1)[0])
contentNamespace.setNewDataMetaInfo(metaInfo)
ckPrefix = Name("/some/ck/prefix")
encryptor = prepareData(ckPrefix, keyChain, face)
# Make the callback to produce a Data packet for a content segment.
def onObjectNeeded(namespace, neededNamespace, id):
if not (len(neededNamespace.name) == len(contentPrefix) + 1
and contentPrefix.isPrefixOf(neededNamespace.name)
and neededNamespace.name[-1].isSegment()):
# Not a content segment, ignore.
return False
# Get the segment number.
segment = neededNamespace.name[-1].toSegment()
if not (segment >= 0 and segment <= 1):
# An invalid segment was requested.
return False
segmentContent = ("This test message was decrypted"
if segment == 0 else " from segments.")
# Now call serializeObject which will answer the pending incoming Interest.
dump("Producing Data", neededNamespace.name)
neededNamespace.serializeObject(
encryptor.encrypt(Blob(segmentContent)).wireEncodeV2())
return True
contentNamespace.addOnObjectNeeded(onObjectNeeded)
dump("Register prefix", contentNamespace.name)
# Set the face and register to receive Interests.
contentNamespace.setFace(
face,
lambda prefixName: dump("Register failed for prefix", prefixName))
while True:
face.processEvents()
# We need to sleep for a few milliseconds so we don't use 100% of the CPU.
time.sleep(0.01)
