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evoting.py
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evoting.py
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import hashlib
import os
import random
import socket
import pickle
import struct
import sys
import threading
import uuid
from cryptography.hazmat.primitives.asymmetric import rsa, padding, utils
from cryptography.hazmat.primitives import serialization, hashes
from cryptography.hazmat.primitives.serialization import Encoding, PublicFormat
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.asymmetric import padding
from Crypto.Util.number import getPrime, inverse
from Crypto.Util.number import bytes_to_long, long_to_bytes
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad
HOST = '127.0.0.1'
class Voter():
election_id = ''
collector1_pk = ''
collector1_pk_length = ''
collector1_key_hash = ''
collector1_host = HOST
collector1_host_length = ''
collector1_port = ''
collector2_pk = ''
collector2_pk_length = ''
collector2_key_hash = ''
collector2_host = HOST
collector2_host_length = ''
collector2_port = ''
M = 2
name1_length = ''
name1 = ''
name2_length = ''
name2 = ''
def __init__(self, voter_id, admin_port):
self.voter_id = int(voter_id)
voter_private_key = rsa.generate_private_key(
public_exponent=65537,
key_size=2048,
)
with open(f"data/voter{voter_id}_private_key.pem", "wb") as f:
f.write(voter_private_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.PKCS8,
encryption_algorithm=serialization.NoEncryption()
))
message_type = b'\x03'
serialized_key = voter_private_key.public_key().public_bytes(
encoding=serialization.Encoding.DER,
format=serialization.PublicFormat.SubjectPublicKeyInfo
)
key_hash = hashlib.sha256(serialized_key).digest()
votr_id = self.voter_id.to_bytes(4, byteorder='big')
payload = message_type + key_hash + votr_id
random_bytes = os.urandom(32)
# Sign the payload
signature = voter_private_key.sign(
payload,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
payload_length = struct.pack('>I', len(payload))
signature_length = struct.pack('>I', len(signature))
message = payload_length + payload + random_bytes + signature_length + signature
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.connect((HOST, int(admin_port)))
print("Connected to Admin Server")
print("Registered Succefully")
print("Election Data Received")
server.sendall(message)
payload_length = None
payload = None
random_bits = None
signature_length = None
signature = None
# Receive payload length
payload_data = server.recv(2000)
# print(payload_length_data)
payload_len = payload_data[:4]
message_type = payload_data[4:4+1]
election_ID = payload_data[4+1:4+1+16]
print('Election ID_ADMIN: ', election_ID, int.from_bytes(election_ID, byteorder="big"))
c1_host_length = payload_data[4+1+16:4+1+16+4]
print('C1_host_length', c1_host_length, int.from_bytes(c1_host_length, byteorder="big"))
c1_host = payload_data[4+1+16+4:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")]
print('C1_host', c1_host, c1_host.decode('utf-8'))
c1_port = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big"):4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2]
print('C1_port', int.from_bytes(c1_port, byteorder="big"))
c1_pk_length = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4]
print('C1_pk_length', int.from_bytes(c1_pk_length, byteorder="big"))
c1_pk = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")]
print('C1_pk', c1_pk)
c2_host_length = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big"):4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4]
print('C2_host_length', c2_host_length, int.from_bytes(c2_host_length, byteorder="big"))
c2_host = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")]
print('C2_host', c2_host, c2_host.decode('utf-8'))
c2_port = payload_data[24+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big"):4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2]
print('C2_port', int.from_bytes(c2_port, byteorder="big"))
c2_pk_length = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4]
print('C2_pk_length', int.from_bytes(c2_pk_length, byteorder="big"))
c2_pk = payload[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")]
print('C2_pk', c2_pk)
M = payload[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big"):4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1]
print('M: ', M, int.from_bytes(M, byteorder="big"))
name1_length = payload[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4]
print('name1_length: ', name1_length, int.from_bytes(name1_length, byteorder="big"))
name1 = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big"):21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")]
print('name1: ', name1, name1.decode('utf-8'))
name2_length = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big"):21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")+4]
print('name2_length: ', name2_length, int.from_bytes(name2_length, byteorder="big"))
name2 = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")+4:21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")+4+int.from_bytes(name2_length, byteorder="big")]
print('name2: ', name2, name2.decode('utf-8'))
return
# payload_length = struct.unpack('!I', payload_length_data)[0]
# # print("size", int.from_bytes(payload_length, byteorder="big"))
# print("size", payload_length)
# # Receive payload
payload_data = server.recv(payload_length)
# # Receive random bits
# random_bits_data = server.recv(32)
# # Receive signature length
# signature_length_data = server.recv(4)
# Receive signature
# signature_data = server.recv(signature_length)
# Unpack payload
message_type = payload_data[:1]
election_ID = payload_data[1:17]
print('Election ID_ADMIN: ', election_ID, int.from_bytes(election_ID, byteorder="big"))
c1_host_length = payload_data[17:21]
print('C1_host_length', c1_host_length, int.from_bytes(c1_host_length, byteorder="big"))
c1_host = payload_data[21:21+int.from_bytes(c1_host_length, byteorder="big")]
print('C1_host', c1_host, c1_host.decode('utf-8'))
c1_port = payload_data[21+int.from_bytes(c1_host_length, byteorder="big"):21+int.from_bytes(c1_host_length, byteorder="big")+2]
print('C1_port', int.from_bytes(c1_port, byteorder="big"))
c1_pk_length = payload_data[21+int.from_bytes(c1_host_length, byteorder="big")+2:21+int.from_bytes(c1_host_length, byteorder="big")+2+4]
print('C1_pk_length', int.from_bytes(c1_pk_length, byteorder="big"))
c1_pk = payload_data[21+int.from_bytes(c1_host_length, byteorder="big")+2+4:21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")]
print('C1_pk', c1_pk)
c2_host_length = payload_data[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big"):21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4]
print('C2_host_length', c2_host_length, int.from_bytes(c2_host_length, byteorder="big"))
c2_host = payload_data[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4:21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")]
print('C2_host', c2_host, c2_host.decode('utf-8'))
c2_port = payload_data[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big"):21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2]
print('C2_port', int.from_bytes(c2_port, byteorder="big"))
c2_pk_length = payload_data[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2:21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4]
print('C2_pk_length', int.from_bytes(c2_pk_length, byteorder="big"))
# c2_pk = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4:21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")]
# print('C2_pk', c2_pk)
# M = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length,send and receive byte string in tcp python byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big"):21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1]
# name1_length = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1:21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4]
# name1 = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big"):21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")]
# name2_length = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big"):21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")+4]
# name2 = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")+4:21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")+4++int.from_bytes(name2_length, byteorder="big")]
# print('host: ',c1_host)
# print('port: ', c1_port)
# print('host: ',c2_host)
# print('port: ', c2_port)
# print('name1: ', name1)
# print('name2: ', name2)
def voter_info_req():
# send signed to admin
# message_type TYPE_REGISTER = 0x03
# public_key_hash
# voter id
admin_host = 'local_host'
admin_port = 8000
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((admin_host, admin_port))
voter_public_key, voter_private_key, admin_public_key, voter_id = '',
serialized_key = voter_public_key.public_bytes(
encoding=serialization.Encoding.DER,
format=serialization.PublicFormat.SubjectPublicKeyInfo
)
key_hash = hashlib.sha256(serialized_key).digest()
# Create the message to sign
message = b'\x03' + key_hash + voter_id.to_bytes(4, byteorder='big')
# Sign the message
signature = voter_private_key.sign(
message,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
# Create the final message to send
final_message = b'\x03' + key_hash + voter_id.to_bytes(4, byteorder='big') + signature
# Encrypt the message for the admin
encrypted_message = admin_public_key.encrypt(
final_message,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA256()),
algorithm=hashes.SHA256(),
label=None
)
)
# Send the message to the admin
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
s.connect(('admin_hostname', admin_port))
s.sendall(encrypted_message)
# receive metadata
def voter_register():
voter_private_key, = ''
message = 'receive_message(s)'
# Verify the signature
signature = message[-256:]
signed_data = message[:-256]
try:
voter_public_key = voter_private_key.public_key()
voter_public_key.verify(
signature,
signed_data,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
except Exception as e:
print(f"Signature verification failed: {e}")
return None
# Extract the data
metadata_bytes = message
metadata_type = int.from_bytes(metadata_bytes[0:1], byteorder='big')
election_id = metadata_bytes[1:17]
c1_host_length = int.from_bytes(metadata_bytes[17:21], byteorder='big')
c1_host = metadata_bytes[21:21+c1_host_length].decode('utf-8')
c1_port = int.from_bytes(metadata_bytes[21+c1_host_length:23+c1_host_length], byteorder='big')
c1_pk_length = int.from_bytes(metadata_bytes[23+c1_host_length:27+c1_host_length], byteorder='big')
c1_pk = metadata_bytes[27+c1_host_length:27+c1_host_length+c1_pk_length]
c2_host_length = int.from_bytes(metadata_bytes[27+c1_host_length:31+c1_host_length], byteorder='big')
c2_host = metadata_bytes[31+c1_host_length:31+c1_host_length+c2_host_length].decode('utf-8')
c2_port = int.from_bytes(metadata_bytes[31+c1_host_length+c2_host_length:33+c1_host_length+c2_host_length], byteorder='big')
c2_pk_length = int.from_bytes(metadata_bytes[33+c1_host_length+c2_host_length:37+c1_host_length+c2_host_length], byteorder='big')
c2_pk = metadata_bytes[37+c1_host_length+c2_host_length:37+c1_host_length+c2_host_length+c2_pk_length]
num_candidates = int.from_bytes(metadata_bytes[-15:-14], byteorder='big')
name1_length = int.from_bytes(metadata_bytes[-14:-10], byteorder='big')
name1 = metadata_bytes[-10-name1_length:-10].decode('utf-8')
name2_length = int.from_bytes(metadata_bytes[-10:-6], byteorder='big')
name2 = metadata_bytes[-6-name2_length:-6].decode('utf-8')
def vote(admin_host,admin_port):
# voter sends to collector 2
# message_type TYPE_SHARES_REQUEST=0x08
# voter ID
# election ID
voter_private_key, collector_public_key, collector_address, election_id, voter_id, collector_port = ''
voter_public_key = voter_private_key.public_key()
serialized_key = voter_public_key.public_bytes(
encoding=serialization.Encoding.DER,
format=serialization.PublicFormat.SubjectPublicKeyInfo
)
key_hash = hashlib.sha256(serialized_key).digest()
# Create the message to sign
message = b'\x03' + key_hash + election_id + voter_id.to_bytes(4, byteorder='big')
# Sign the message
signature = voter_private_key.sign(
message,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
# Create the final message to send
final_message = b'\x08' + key_hash + election_id + voter_id.to_bytes(4, byteorder='big') + signature
# Encrypt the message for the collector
encrypted_message = collector_public_key.encrypt(
final_message,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA256()),
algorithm=hashes.SHA256(),
label=None
)
)
# Send the message to the collector
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
s.connect((collector_address, collector_port))
s.sendall(encrypted_message)
class Administrator():
election_id = ''
collector1_pk = ''
collector1_pk_length = ''
collector1_key_hash = ''
collector1_host = ''
collector1_host_length = ''
collector1_port = ''
collector2_pk = ''
collector2_pk_length = ''
collector2_key_hash = ''
collector2_host = ''
collector2_host_length = ''
collector2_port = ''
admin_port = ''
admin_pk = ''
M = 2
N = 0
admin_private_key = ''
def __init__(self):
# Generate a election
election_id = os.urandom(16)
Administrator.election_id = election_id
print("***INITIALISING***")
admin_private_key = rsa.generate_private_key(
public_exponent=65537,
key_size=2048,
)
Administrator.admin_private_key = admin_private_key
with open("data/admin_private_key.pem", "wb") as f:
f.write(admin_private_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.PKCS8,
encryption_algorithm=serialization.NoEncryption()
))
# Generate public-private key pair for collectors
collector1_private_key = rsa.generate_private_key(
public_exponent=65537,
key_size=2048,
)
with open("data/collector1_private_key.pem", "wb") as f:
f.write(collector1_private_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.PKCS8,
encryption_algorithm=serialization.NoEncryption()
))
collector2_private_key = rsa.generate_private_key(
public_exponent=65537,
key_size=2048,
)
with open("data/collector2_private_key.pem", "wb") as f:
f.write(collector2_private_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.PKCS8,
encryption_algorithm=serialization.NoEncryption()
))
collector1_pk = collector1_private_key.public_key()
collector2_pk = collector2_private_key.public_key()
admin_pk = admin_private_key.public_key()
# collector1_pk_length = len(collector1_pk)
# collector2_pk_length = len(collector2_pk)
col1_hash = collector1_pk.public_bytes(encoding=serialization.Encoding.DER, format=serialization.PublicFormat.SubjectPublicKeyInfo)
col2_hash = collector2_pk.public_bytes(encoding=serialization.Encoding.DER, format=serialization.PublicFormat.SubjectPublicKeyInfo)
collector1_key_hash = hashlib.sha256(col1_hash)
collector1_key_hash = collector1_key_hash.digest()
collector2_key_hash = hashlib.sha256(col2_hash)
collector2_key_hash = collector2_key_hash.digest()
collector1_pk_bytes = collector1_pk.public_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PublicFormat.SubjectPublicKeyInfo,
)
collector2_pk_bytes = collector2_pk.public_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PublicFormat.SubjectPublicKeyInfo,
)
Administrator.collector1_pk = collector1_pk_bytes
Administrator.collector2_pk = collector2_pk_bytes
Administrator.admin_pk = admin_pk
# Administrator.collector1_pk_length = collector1_pk_length
# Administrator.collector2_pk_length = collector2_pk_length
Administrator.collector1_key_hash = collector1_key_hash
Administrator.collector2_key_hash = collector2_key_hash
collector_host = HOST
Administrator.collector1_host_length = len(collector_host)
Administrator.collector2_host_length = len(collector_host)
print("Now Enter the Ports for Admin and the collectors e.g 8000, 8001, 8002")
Administrator.admin_port = int(input("Enter port number for Admin: "))
Administrator.collector1_port = int(input("Enter port number for collector 1: "))
Administrator.collector2_port = int(input("Enter port number for collector 2: "))
voter_ids = [1, 2, 3, 4, 5]
server_thread = threading.Thread(target=self.admin_server)
server_thread.start()
def admin_server(self):
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind((HOST, int(Administrator.admin_port)))
server.listen(1)
voters = []
while True:
client, address = server.accept()
print(f"Connection Established with - PORT : {address[1]}")
data = client.recv(1024)
if data.find(b'\x03') != -1:
# extract the payload length
payload_length = int.from_bytes(data[:4], byteorder='big')
# extract the payload
payload = data[4:4+payload_length]
# extract the random bits
random_bits = data[4+payload_length:4+payload_length+32]
# extract the signature length
signature_length_start = 4+payload_length+32
signature_length_end = signature_length_start + 4
signature_length = int.from_bytes(data[signature_length_start:signature_length_end], byteorder='big')
# extract the signature
signature_start = signature_length_end
signature_end = signature_start + signature_length
signature = data[signature_start:signature_end]
# extract the payload contents
message_type = int.from_bytes(payload[:4], byteorder='big')
key_hash = payload[4:68]
voter_id = payload[33:38]
print(f'Election Data Sent to {voter_id}')
message_type = b'\x04'
election_ID = Administrator.election_id
print('Election ID_ADMIN: ', election_ID, int.from_bytes(election_ID, byteorder="big"))
C1_host_length = len(HOST.encode('utf-8')).to_bytes(4, byteorder='big')
print('C1_host_length', C1_host_length, int.from_bytes(election_ID, byteorder="big"))
C1_host = HOST.encode('utf-8')
print('C1_host', C1_host, HOST.encode('utf-8'))
C1_port = Administrator.collector1_port.to_bytes(2, byteorder='big')
print('C1_port', C1_port, Administrator.collector1_port)
C1_pk_length = len(Administrator.collector1_pk).to_bytes(4, byteorder='big')
print('C1_pk_length', C1_pk_length , len(Administrator.collector1_pk))
C1_pk = Administrator.collector1_pk
print('C1_pk ', C1_pk, )
C2_host_length = len(HOST.encode('utf-8')).to_bytes(4, byteorder='big')
print('C2_host_length', C2_host_length, len(HOST.encode('utf-8')))
C2_host = HOST.encode('utf-8')
print('C2_host', C2_host, HOST)
C2_port = Administrator.collector2_port.to_bytes(2, byteorder='big')
print('C2_port', C2_port, Administrator.collector2_port)
C2_pk_length = len(Administrator.collector2_pk).to_bytes(4, byteorder='big')
print('C2_pk_length ', C2_pk_length, len(Administrator.collector2_pk))
C2_pk = Administrator.collector2_pk
print('C2_pk', C2_pk, )
M = (2).to_bytes(1, byteorder='big')
print('M', M, 2)
name1 = 'Competitor 1'.encode('utf-8')
print('name1 ', name1, 'Competitor 1')
name1_length = len(name1).to_bytes(4, byteorder='big')
print('name1_length ', name1_length, len(name1))
name2 = 'Competitor 2'.encode('utf-8')
print('name2', name2, 'Competitor 2')
name2_length = len(name2).to_bytes(4, byteorder='big')
print('name1_length ', name1_length, len(name1))
respond = [message_type , election_ID , C1_host_length , C1_host , C1_port , C1_pk_length , C1_pk , C2_host_length , C2_host , C2_port , C2_pk_length , C2_pk , M , name1_length , name1 , name2_length , name2]
response = b''
for i in respond:
print(i)
response += i
print(response)
# hash_value = hashes.Hash(hashes.BLAKE2b(64), backend=default_backend())
# hash_value.update(response + b'\x00' * 32)
# digest = hash_value.finalize()
# signature = Administrator.admin_private_key.sign(
# digest,
# padding.PKCS1v15(),
# hashes.SHA256()
# )
# send the signed response message
response_length = len(response).to_bytes(4, byteorder='big')
signature_length = len(signature).to_bytes(4, byteorder='big')
client.sendall(k := response_length + response + os.urandom(32) + signature_length + signature)
payload_data = response_length + response
payload_len = payload_data[:4]
message_type = payload_data[4:4+1]
election_ID = payload_data[4+1:4+1+16]
print('Election ID_ADMIN: ', election_ID, int.from_bytes(election_ID, byteorder="big"))
c1_host_length = payload_data[4+1+16:4+1+16+4]
print('C1_host_length', c1_host_length, int.from_bytes(c1_host_length, byteorder="big"))
c1_host = payload_data[4+1+16+4:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")]
print('C1_host', c1_host, c1_host.decode('utf-8'))
c1_port = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big"):4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2]
print('C1_port', int.from_bytes(c1_port, byteorder="big"))
c1_pk_length = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4]
print('C1_pk_length', int.from_bytes(c1_pk_length, byteorder="big"))
c1_pk = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")]
print('C1_pk', c1_pk)
c2_host_length = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big"):4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4]
print('C2_host_length', c2_host_length, int.from_bytes(c2_host_length, byteorder="big"))
c2_host = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")]
print('C2_host', c2_host, c2_host.decode('utf-8'))
c2_port = payload_data[24+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big"):4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2]
print('C2_port', int.from_bytes(c2_port, byteorder="big"))
c2_pk_length = payload_data[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4]
print('C2_pk_length', int.from_bytes(c2_pk_length, byteorder="big"))
c2_pk = payload[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")]
print('C2_pk', c2_pk)
M = payload[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big"):4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1]
print('M: ', M, int.from_bytes(M, byteorder="big"))
name1_length = payload[4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1:4+1+16+4+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4]
print('name1_length: ', name1_length, int.from_bytes(name1_length, byteorder="big"))
name1 = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big"):21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")]
print('name1: ', name1, name1.decode('utf-8'))
name2_length = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big"):21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")+4]
print('name2_length: ', name2_length, int.from_bytes(name2_length, byteorder="big"))
name2 = payload[21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")+4:21+int.from_bytes(c1_host_length, byteorder="big")+2+4+int.from_bytes(c1_pk_length, byteorder="big")+4+int.from_bytes(c2_host_length, byteorder="big")+2+4+int.from_bytes(c2_pk_length, byteorder="big")+1+4+int.from_bytes(name1_length, byteorder="big")+4+int.from_bytes(name2_length, byteorder="big")]
print('name2: ', name2, name2.decode('utf-8'))
if len(voters) == 5:
print('**REGISTRATION PERIOD ENDED**')
print('**SENDING LIST OF VOTERS TO COLLECTORS**')
print('**COLLECTOR 1 TO INITIALISE PAILIER**')
...
break
else:
print('election', int.from_bytes(Administrator.election_id, byteorder='big'))
client.send(Administrator.election_id)
def admin_client(self, port, message):
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.connect((HOST, port))
print("sending voters list to collector")
server.send(message)
# Define the collector and administrator data structures
# collector1 = {'host': 'localhost', 'port': 8000, 'public_key': collector1_public_key}
# collector2 = {'host': 'localhost', 'port': 8001, 'public_key': collector2_public_key}
# administrator = {'host': 'localhost', 'port': 8002, 'public_key': admin_public_key}
def receive_voter_register():
admin_private_key, message = ''
# Decrypt the message
decrypted_message = admin_private_key.decrypt(
message,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA256()),
algorithm=hashes.SHA256(),
label=None
)
)
# Parse the message
key_hash = decrypted_message[0:64]
voter_id = int.from_bytes(decrypted_message[64:68], byteorder='big')
# Verify the signature
signature = decrypted_message[68:]
message_to_verify = key_hash + voter_id.to_bytes(4, byteorder='big')
admin_public_key = admin_private_key.public_key()
try:
admin_public_key.verify(
signature,
message_to_verify,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
except:
print("Invalid signature.")
key_hash = key_hash.decode('utf-8')
voter_id = str(voter_id)
return key_hash, voter_id
def voter_info_response(voter_id, key_hash):
# response func
# send signed to voter.
# message_type TYPE_METADATA_VOTER=0x04
# Election ID
# collectors info
# list of candidates
# Serialize the public keys
serialized_c1_pk = c1_public_key.public_bytes(
encoding=serialization.Encoding.DER,
format=serialization.PublicFormat.SubjectPublicKeyInfo
)
serialized_c2_pk = c2_public_key.public_bytes(
encoding=serialization.Encoding.DER,
format=serialization.PublicFormat.SubjectPublicKeyInfo
)
# Serialize the candidate names
serialized_names = b''
for name in candidate_names:
name_length = len(name).to_bytes(4, byteorder='big')
serialized_names += name_length + name.encode()
c1_public_key, c2_public_key, candidate_names, election_id, c1_host, c1_port, c2_host, c2_port, num_candidates, admin_private_key = ''
# Create the message to sign
message = b'\x04' + election_id + \
len(c1_host).to_bytes(4, byteorder='big') + c1_host.encode() + \
c1_port.to_bytes(2, byteorder='big') + \
len(serialized_c1_pk).to_bytes(4, byteorder='big') + serialized_c1_pk + \
len(c2_host).to_bytes(4, byteorder='big') + c2_host.encode() + \
c2_port.to_bytes(2, byteorder='big') + \
len(serialized_c2_pk).to_bytes(4, byteorder='big') + serialized_c2_pk + \
num_candidates.to_bytes(1, byteorder='big') + serialized_names
# Sign the message
signature = admin_private_key.sign(
message,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
# Create the final message to send
final_message = b'\x04' + election_id + \
len(c1_host).to_bytes(4, byteorder='big') + c1_host.encode() + \
c1_port.to_bytes(2, byteorder='big') + \
len(serialized_c1_pk).to_bytes(4, byteorder='big') + serialized_c1_pk + \
len(c2_host).to_bytes(4, byteorder='big') + c2_host.encode() + \
c2_port.to_bytes(2, byteorder='big') + \
len(serialized_c2_pk).to_bytes(4, byteorder='big') + serialized_c2_pk + \
num_candidates.to_bytes(1, byteorder='big') + serialized_names + \
signature
return final_message
def voters_list_to_collectors():
# send signed to both collectors
# message_type TYPE_VOTERS = 0x05
# Election ID
# voters info(ID, pk & pk hash)
election_id, collector_public_key, admin_private_key, collector_address, voter_list, s = 'to be', '', 'voter_list'
# Serialize the voter list
serialized_voter_list = []
for voter in voter_list:
voter_id = voter['id'].to_bytes(4, byteorder='big')
voter_pk_length = len(voter['pk']).to_bytes(4, byteorder='big')
serialized_voter = voter_id + voter_pk_length + voter['pk']
serialized_voter_list.append(serialized_voter)
# Concatenate the serialized voters
serialized_voters = b''.join(serialized_voter_list)
# Create the message to sign
message = b'\x05' + election_id + len(voter_list).to_bytes(4, byteorder='big') + serialized_voters
# Sign the message
signature = admin_private_key.sign(
message,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
# Create the final message to send
final_message = b'\x02' + election_id + len(voter_list).to_bytes(4, byteorder='big') + serialized_voters + signature
# Encrypt the message for the collector
encrypted_message = collector_public_key.encrypt(
final_message,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA256()),
algorithm=hashes.SHA256(),
label=None
)
)
s.connect(collector_address)
# Send the encrypted message
s.sendall(encrypted_message)
# Close the socket
# s.close()
class Collector():
election_id = ''
M = 2
N = 0
voters_info = []
paillier_public_key = ''
def __init__(self, admin_port, collector_index):
self.collector_index = collector_index
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.connect((HOST, admin_port))
print("Connected to Admin")
election_id = server.recv(1024)
try:
election_id = election_id.decode('utf-8')
print(f"utf: {election_id}")
except UnicodeDecodeError:
print('id_int',int.from_bytes(election_id, byteorder='big'))
election_id = election_id.hex()
print(f"hex: {election_id}")
Collector.election_id = election_id
with open("data/collector1_private_key.pem", "rb") as f:
pem_data = f.read()
collector1_private_key = serialization.load_pem_private_key(
pem_data,
password=None
)
with open("data/collector2_private_key.pem", "rb") as f:
pem_data = f.read()
collector2_private_key = serialization.load_pem_private_key(
pem_data,
password=None
)
if collector_index == 1:
self.pk = collector1_private_key.public_key()
# self.pk_length = len(self.pk)
# key_hash = hashlib.sha256(self.pk)
# key_hash = key_hash.digest()
# self.key_hash = key_hash
self.other_C_host_length = len(HOST)
self.other_C_host = HOST
self.other_C_port = input("Enter Port that you Entered for Collector2 in Admin server")
self.other_C_pk = collector2_private_key.public_key()
# self.other_C_pk_length = len(self.other_C_pk)
else:
self.pk = collector2_private_key.public_key()
# self.pk_length = len(self.pk)
# key_hash = hashlib.sha256(self.pk)
# key_hash = key_hash.digest()
# self.key_hash = key_hash
self.other_C_host_length = len(HOST)
self.other_C_host = HOST
self.other_C_port = input("Enter Port that you Entered for Collector1 in Admin server")
self.other_C_pk = collector1_private_key.public_key()
# self.other_C_pk_length = len(self.other_C_pk)
def send_shares():
# send signed to both collectors
# message_type TYPE_SHARES
# key hash
# election ID
# N
...
def receive_type_voters(self):
encrypted_message, collector_private_key, admin_public_key = '', ''
# Decrypt the message using the collector's private key
decrypted_message = collector_private_key.decrypt(
encrypted_message,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA256()),
algorithm=hashes.SHA256(),
label=None
)
)
# Unparse the message
message_type = decrypted_message[0:1]
election_id = decrypted_message[1:17]
num_voters = int.from_bytes(decrypted_message[17:21], byteorder='big')
serialized_voters = decrypted_message[21:-256]
signature = decrypted_message[-256:]
self.N = num_voters
# Verify the signature using the admin's public key
admin_public_key.verify(
signature,
b'\x02' + election_id + num_voters.to_bytes(4, byteorder='big') + serialized_voters,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
# Parse the serialized voters
voters = []
i = 0
while i < len(serialized_voters):
voter_id = int.from_bytes(serialized_voters[i:i+4], byteorder='big')
voter_pk_length = int.from_bytes(serialized_voters[i+4:i+8], byteorder='big')
voter_pk = serialized_voters[i+8:i+8+voter_pk_length]
voters.append({'id': voter_id, 'pk': voter_pk})
i += 8 + voter_pk_length
# # Close the socket
# conn.close()
# s.close()
def paillier_init(self):
# Choose two large prime numbers p and q of equal length and 2048 bits
p = getPrime(2048)
q = getPrime(2048)
n = p * q
lamda = (p - 1) * (q - 1)
mu = inverse(lamda, n)
# Let g = n + 1, which will be used as the public key
public_key = n + 1
private_key = (lamda, mu)
public_key_bytes = public_key.to_bytes((public_key.bit_length() + 7) // 8, byteorder='big')
#send(public_key_bytes)
def las_c1_initiate(self):
message_type = b'0x06'
election_id = Collector.election_id.encode()
N = len(Collector.voters_info) # num_of_voters
# Generate random permutation of {0, 1, ..., N-1}
pi = random.sample(range(N), N)
# Encrypt each permuted value using Paillier cryptosystem
encrypted_values = []
# for i in range(N):
# encrypted_value = paillier_encrypt(pi[i], self.paillier_key.public_key)
# encrypted_values.append(encrypted_value)
# Serialize and pack message fields
# key_hash = hashlib.sha256(rsa_key.publickey().export_key()).digest()
# n_bytes = long_to_bytes(N)
# value1_bytes = b"".join([long_to_bytes(value) for value in encrypted_values])
# packed_message = message_type + self.key_hash + election_id + n_bytes + value1_bytes
# Sign the message with RSA digital signature
# signature = rsa_key.sign(packed_message, "")
# signed_message = packed_message + signature
# Encrypt the signed message with AES
iv = b"1234567890123456"
cipher = AES.new(self.key_hash[:16], AES.MODE_CBC, iv)
# encrypted_message = cipher.encrypt(pad(signed_message, 16))
# Connect to c2 over TCP and send the encrypted message
TCP_IP = 'c2_ip_address'
TCP_PORT = 1234
BUFFER_SIZE = 1024
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TCP_IP, TCP_PORT))
# s.send(encrypted_message)
data = s.recv(BUFFER_SIZE)
s.close()
def las_c2_response(self):
# TYPE_LAS2 0x07
...
# -- Sub-protocal 1----
def initiate_verification(admin_host, admin_port, election_id):
# send signed to the other collector
# message_type TYPE_VERIFY1
# key hash
# election ID
# voter ID
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((admin_host, admin_port))
message_type = b'TYPE_VERIFY1'
key_hash = b'64_byte_key_hash'
voter_id = b'4_byte_voter_id'
message = (message_type, key_hash, election_id, voter_id)
with open("collector1_private_key.pem", "rb") as f:
pem_data = f.read()
collector1_private_key = serialization.load_pem_private_key(
pem_data,
password=None
)
signature = collector1_private_key.sign(pickle.dumps(message), padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
), hashes.SHA256())
...
def init_response1(i):
# send signed and Encrypted to initiating collector
# message_type TYPE_VERIFY2
# election ID
# STPM_index
# value_length
# value
# message_type = b'TYPE_VERIFY2'
# key_hash = b'64_byte_key_hash'
# election_id = b'4_byte_voter_id'
# STPM_index = i
# value_length
# value
# message = (message_type, key_hash, election_id, STPM_index, value_length, value)
# with open("collector1_private_key.pem", "rb") as f:
# pem_data = f.read()
# collector1_private_key = serialization.load_pem_private_key(
# pem_data,
# password=None
# )
# signature = collector1_private_key.sign(pickle.dumps(message), padding.PSS(
# mgf=padding.MGF1(hashes.SHA256()),
# salt_length=padding.PSS.MAX_LENGTH
# ), hashes.SHA256())
...
def init_response2(i):
# send signed and Encrypted to initres1 initiating collector
# message_type TYPE_VERIFY3
# election ID
# STPM_index
# value_length
# value
# message_type = b'TYPE_VERIFY3'
# key_hash = b'64_byte_key_hash'
# election_id = b'4_byte_voter_id'
# STPM_index = i
# value_length
# value
# message = (message_type, key_hash, election_id, STPM_index, value_length, value)
# with open("collector1_private_key.pem", "rb") as f:
# pem_data = f.read()
# collector1_private_key = serialization.load_pem_private_key(
# pem_data,
# password=None
# )
# signature = collector1_private_key.sign(pickle.dumps(message), padding.PSS(
# mgf=padding.MGF1(hashes.SHA256()),
# salt_length=padding.PSS.MAX_LENGTH
# ), hashes.SHA256())
...
# collectors exchange product
def product_send():
# send signed and Encrypted to other collector
# message_type TYPE_VERIFY4
# election ID
# product_length
# product
...
# ------- Sub Protocal 2 --------
def send_gsi():
# each collector send signed and Encrypted to other collector
# message_type TYPE_VERIFY5
# key_hash 64 bytes
# election ID
...
def send_to_admin():
...
class Communication():
# Define constants for IP addresses and ports
ADMIN_IP = 'localhost'
ADMIN_PORT = 5000
COLLECTOR1_IP = 'localhost'
COLLECTOR1_PORT = 5001