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vsock-poc.py
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vsock-poc.py
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#!/usr/local/bin/env python3
# Copyright 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0
import io
import argparse
import socket
import sys
import subprocess
import threading
import time
import base64
import json
global bucketBuyer1
global bucketBuyer2
global bucketBiddingService
global instanceRoleARN
bucketBuyer1 = ""
bucketBuyer2 = ""
bucketBiddingService = ""
instanceRoleARN = ""
class VsockHandler:
def __init__(self, cid, port, enclave):
self.requestQueue = []
self.responseQueue = []
self.requestID = 0
listenport = port
sendport = port + 1
if not enclave:
listenport = port + 1
sendport = port
self.listener = threading.Thread(target=self.listener_vsock_thread, args=(listenport,))
self.sender = threading.Thread(target=self.sender_vsock_thread, args=(cid,sendport,))
self.enclave = enclave
def start(self):
self.run = True
self.listener.start()
self.sender.start()
def listener_vsock_thread(self, port):
self.listenerObject = VsockListener(self)
self.listenerObject.bind(port)
self.listenerObject.recv_data(self.enclave,port)
def sender_vsock_thread(self, cid, port):
while self.run:
for i in list(self.requestQueue):
self.requestQueue.remove(i);
msg = str(i.msgID) + "," + i.msg
print("SEND: Sending msg: "+msg+" to "+str(cid)+":"+str(port))
client = VsockStream(self)
endpoint = (cid, port)
client.connect(endpoint)
client.send_data(msg.encode())
time.sleep(0.5)
def request(self, msgID, msg, waitResp):
if waitResp:
msgID = self.requestID
self.requestID += 1
self.requestQueue.append(socketMessage(msgID,msg))
msgNotReady = waitResp
returnMsg = ""
while msgNotReady:
for i in list(self.responseQueue):
if int(i.msgID) == int(msgID):
returnMsg = i.msg
self.responseQueue.remove(i)
msgNotReady = False
time.sleep(0.5)
return returnMsg
def response(self, msgID, msg):
self.responseQueue.append(socketMessage(msgID,msg))
def close(self):
self.run = False
self.listenerObject.close()
class VsockStream:
"""Client"""
def __init__(self, vsockhandle, conn_tmo=5):
self.vsockhandle = vsockhandle
self.conn_tmo = conn_tmo
def connect(self, endpoint):
"""Connect to the remote endpoint"""
self.sock = socket.socket(socket.AF_VSOCK, socket.SOCK_STREAM)
self.sock.settimeout(self.conn_tmo)
self.sock.connect(endpoint)
def send_data(self, data):
"""Send data to the remote endpoint"""
self.sock.sendall(data)
self.sock.close()
class VsockListener:
"""Server"""
def __init__(self, vsockhandle, conn_backlog=128):
self.vsockhandle = vsockhandle
self.conn_backlog = conn_backlog
def bind(self, port):
"""Bind and listen for connections on the specified port"""
self.sock = socket.socket(socket.AF_VSOCK, socket.SOCK_STREAM)
self.sock.bind((socket.VMADDR_CID_ANY, port))
self.sock.listen(self.conn_backlog)
self.sock.setblocking(0)
self.run = True
def recv_data(self, enclave, port):
"""Receive data from a remote endpoint"""
while self.run:
try:
(from_client, (remote_cid, remote_port)) = self.sock.accept()
data = from_client.recv(1024).decode()
if not data:
break
print("RECEIVE: "+data)
dataStr = data.split(",")
if enclave:
if dataStr[1] == "SetCredential":
self.accessKey = dataStr[2]
self.secretKey = dataStr[3]
self.sessionKey = dataStr[4]
self.vsockhandle.request(dataStr[0],"1",False)
elif dataStr[1] == "Decrypt":
plaintext1 = self.decryptText(dataStr[2]);
plaintext2 = self.decryptText(dataStr[3]);
returnMsg = "Buyer1 Wins"
if int(plaintext2)>int(plaintext1):
returnMsg = "Buyer2 Wins"
print("RECEIVE: sending response from enclave: "+returnMsg)
self.vsockhandle.request(dataStr[0],returnMsg,False)
else:
self.vsockhandle.response(dataStr[0],dataStr[1])
from_client.close()
except:
time.sleep(0.5)
def decryptText(self, data):
proc = subprocess.Popen(
[
"/usr/src/app/kmstool_enclave_cli",
"--region", "us-west-2",
"--proxy-port", "8000",
"--aws-access-key-id", self.accessKey,
"--aws-secret-access-key", self.secretKey,
"--aws-session-token", self.sessionKey,
"--ciphertext", data,
],
stdout=subprocess.PIPE
)
plaintext = proc.communicate()[0].decode()
base64_bytes = plaintext.encode('ascii')
message_bytes = base64.b64decode(base64_bytes)
message = message_bytes.decode('ascii')
return message
def close(self):
self.run = False
class socketMessage:
def __init__(self,msgID,msg):
self.msgID = msgID
self.msg = msg
def parent_handler(args):
global boto3
global codecs
global csv
global pd
import boto3
import codecs
import csv
import pandas as pd
VsockConnection = VsockHandler(args.cid,args.port,False)
print("Starting VsockConnection")
VsockConnection.start()
buyer1data = []
buyer2data = []
resultdata = []
s3client = boto3.client("s3")
stsclient = boto3.client("sts")
stsresponse = stsclient.assume_role(
RoleArn=instanceRoleARN,
RoleSessionName='EnclaveDecrypt'
)
setCredentialResult = VsockConnection.request(0,"SetCredential,"+stsresponse['Credentials']['AccessKeyId']+","+stsresponse['Credentials']['SecretAccessKey']+","+stsresponse['Credentials']['SessionToken'],True)
if setCredentialResult == "1":
data = s3client.get_object(Bucket=bucketBuyer1, Key="encrypted.csv")
for row in csv.DictReader(codecs.getreader("utf-8")(data["Body"])):
buyer1data.append(row['[].bid'])
data2 = s3client.get_object(Bucket=bucketBuyer2, Key="encrypted.csv")
for row in csv.DictReader(codecs.getreader("utf-8")(data2["Body"])):
buyer2data.append(row['[].bid'])
for i in range(len(buyer1data)):
print("Property "+str(i))
result = VsockConnection.request(0,"Decrypt,"+buyer1data[i] + "," + buyer2data[i],True)
print("Result: "+result)
resultdata.append(result)
VsockConnection.close()
output_df = pd.DataFrame(
data={"Property": ["1", "2", "3"], "Result": resultdata},
columns=["Property", "Result"],
)
with io.StringIO() as csv_buffer:
output_df.to_csv(csv_buffer, index=False)
response = s3client.put_object(
Bucket=bucketBiddingService, Key="output.csv", Body=csv_buffer.getvalue()
)
status = response.get("ResponseMetadata", {}).get("HTTPStatusCode")
if status == 200:
print(f"Successful S3 put_object response. Status - {status}")
else:
print(f"Unsuccessful S3 put_object response. Status - {status}")
else:
print("Could not set credentials in Enclave")
def enclave_handler(args):
VsockConnection = VsockHandler(3,args.port,True)
print("Starting VsockConnection")
VsockConnection.start()
def main():
parser = argparse.ArgumentParser(prog='vsock-poc')
parser.add_argument("--version", action="version",
help="Prints version information.",
version='%(prog)s 0.1.0')
subparsers = parser.add_subparsers(title="options")
client_parser = subparsers.add_parser("parent", description="Parent",
help="Connect to a given cid and port.")
client_parser.add_argument("cid", type=int, help="The remote endpoint CID.")
client_parser.add_argument("port", type=int, help="The remote endpoint port.")
client_parser.set_defaults(func=parent_handler)
server_parser = subparsers.add_parser("enclave", description="Enclave",
help="Listen on a given port.")
server_parser.add_argument("port", type=int, help="The local port to listen on.")
server_parser.set_defaults(func=enclave_handler)
if len(sys.argv) < 2:
parser.print_usage()
sys.exit(1)
args = parser.parse_args()
args.func(args)
if __name__ == "__main__":
main()