def securityContextLookup(self, kid):
kidBuf = u.str2buf(kid)
eui64 = kidBuf[:-1]
senderID = eui64 + [0x01] # sender ID of JRC is reversed
recipientID = eui64 + [0x00]
# if eui-64 is found in the list of joined nodes, return the appropriate context
# this is important for replay protection
for dict in self.joinResource.joinedNodes:
if dict['eui64'] == u.buf2str(eui64):
log.info(
"Node {0} found in joinedNodes. Returning context {1}.".
format(binascii.hexlify(dict['eui64']),
str(dict['context'])))
return dict['context']
# if eui-64 is not found, create a new tentative context but only add it to the list of joined nodes in the GET
# handler of the join resource
context = oscoap.SecurityContext(
masterSecret=self.MASTERSECRET,
senderID=u.buf2str(senderID),
recipientID=u.buf2str(recipientID),
aeadAlgorithm=oscoap.AES_CCM_16_64_128())
log.info(
"Node {0} not found in joinedNodes. Instantiating new context based on the master secret."
.format(binascii.hexlify(u.buf2str(eui64))))
return context
respOptions = []
respPayload = [ord(b) for b in 'hello world 1 2 3 4 5 6 7 8 9 0']
return (respCode, respOptions, respPayload)
# open
c = coap.coap(ipAddress='::1')
testResource = testResource()
context = oscoap.SecurityContext(
masterSecret=binascii.unhexlify('000102030405060708090A0B0C0D0E0F'),
senderID=binascii.unhexlify('736572766572'),
recipientID=binascii.unhexlify('636c69656e74'),
aeadAlgorithm=oscoap.AES_CCM_16_64_128())
# add resource - context binding with authorized methods
testResource.addSecurityBinding((context, d.METHOD_ALL))
# install resource
c.addResource(testResource)
for t in threading.enumerate():
print t.name
# let the server run
raw_input('\n\nServer running. Press Enter to close.\n\n')
# close
c.close()