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Cleanup and echo example
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@ -179,7 +179,6 @@ class Identity:
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if self.pub != None:
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chunksize = (Identity.KEYSIZE-Identity.PADDINGSIZE)/8
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chunks = int(math.ceil(len(plaintext)/(float(chunksize))))
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# TODO: Remove debug output print("Plaintext size is "+str(len(plaintext))+", with "+str(chunks)+" chunks")
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ciphertext = "";
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for chunk in range(chunks):
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@ -188,8 +187,6 @@ class Identity:
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if (chunk+1)*chunksize > len(plaintext):
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end = len(plaintext)
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# TODO: Remove debug output print("Processing chunk "+str(chunk+1)+" of "+str(chunks)+". Starting at "+str(start)+" and stopping at "+str(end)+". The length is "+str(len(plaintext[start:end])))
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ciphertext += self.pub.encrypt(
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plaintext[start:end],
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padding.OAEP(
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@ -198,7 +195,6 @@ class Identity:
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label=None
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)
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)
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# TODO: Remove debug output print("Plaintext encrypted, ciphertext length is "+str(len(ciphertext))+" bytes.")
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return ciphertext
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else:
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raise KeyError("Encryption failed because identity does not hold a public key")
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@ -9,7 +9,6 @@ import FPE
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class SerialInterface(Interface):
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MAX_CHUNK = 32768
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TIMEOUT_SECONDS = 1.0
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owner = None
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port = None
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@ -37,13 +37,9 @@ class UdpInterface(Interface):
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def processIncoming(self, data):
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# TODO: remove
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#FPE.log("IN: "+FPE.prettyhexrep(data))
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self.owner.inbound(data)
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def processOutgoing(self,data):
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# TODO: remove
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#FPE.log("OUT: "+FPE.prettyhexrep(" "+data))
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udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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udp_socket.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
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udp_socket.sendto(data, (self.forward_ip, self.forward_port))
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@ -57,7 +53,5 @@ class UdpInterfaceHandler(SocketServer.BaseRequestHandler):
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def handle(self):
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if (UdpInterfaceHandler.interface != None):
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# TODO: remove
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#FPE.log("Datagram contents: "+FPE.prettyhexrep(self.request[0]))
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data = self.request[0]
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UdpInterfaceHandler.interface.processIncoming(data)
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@ -179,11 +179,28 @@ def client(destination_hexhash, configpath):
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# user to wait for an announce to arrive.
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FPE.log("Destination is not yet known. Wait for an announce to arrive.")
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# This method is called when our reply destination
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# receives a proof packet.
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def clientProofCallback(proof_packet):
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# We save the current time so we can calculate
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# round-trip time for the packet
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now = time.time()
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# Let's look through our list of sent requests,
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# and see if we can find one that matches the
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# proof we just received.
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for unproven_packet in sent_requests:
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try:
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# Check that the proof hash matches the
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# hash of the packet we sent earlier
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if unproven_packet.packet_hash == proof_packet.data[:32]:
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# We need to actually calidate the proof.
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# This is simply done by calling the
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# validateProofPacket method on the packet
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# we sent earlier.
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if unproven_packet.validateProofPacket(proof_packet):
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# If the proof is valid, we will calculate
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# the round-trip time, and inform the user.
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rtt = now - unproven_packet.sent_at
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if (rtt >= 1):
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rtt = round(rtt, 3)
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@ -196,14 +213,21 @@ def clientProofCallback(proof_packet):
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"Valid echo reply, proved by "+FPE.prettyhexrep(unproven_packet.destination.hash)+
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", round-trip time was "+rttstring
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)
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# Perform some cleanup
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sent_requests.remove(unproven_packet)
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del unproven_packet
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else:
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FPE.log("Proof invalid")
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# If the proof was invalid, we inform
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# the user of this.
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FPE.log("Echo reply received, but proof was invalid")
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except:
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FPE.log("Proof packet received, but packet contained invalid or unparsable data")
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if __name__ == "__main__":
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# Set up command line arguments and start
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# the selected program mode.
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try:
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parser = argparse.ArgumentParser(description="Simple echo server and client utility")
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parser.add_argument("-s", "--server", action="store_true", help="wait for incoming packets from clients")
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