from cryptography.hazmat.primitives.asymmetric import padding as signature_padder
import chat_library as util
import ast
import traceback
import select
import Queue
import random
from socket import error as socket_err
SERVER_CONFIG = 'server_config.txt'
progress = {}
shared_key = 0
SERVER_KEY = 'server_public_key.pem'
#PUBLIC_KEY = util.get_public_key('server_public_key.pem')
CLIENT_PRIVATE_KEY = util.get_private_key('client_private_key.pem')
CLIENT_PRIVATE_KEY_STR = util.get_public_key_string('client_private_key.pem')
CLIENT_PUBLIC_KEY_STR = util.get_public_key_string('client_public_key.pem')
NONCE_SENT = 0
IV = os.urandom(16)
GENERATED_IV = IV
USERNAME_TO_PORT = {}
EXIT_IN_ERROR = False
ACTION_NONCE = 0
CHAT_NONCE = 0
g = 5 #627
p = 23 #941
a = 0
df_keys = {}
message_tracker = {}
IV_tracker = {}
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import serialization
import os
from cryptography import exceptions
from cryptography.hazmat.primitives import padding as plain_text_padder
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.asymmetric import padding as signature_padder
logger = logging.getLogger('ChatServer')
logger.addHandler(logging.StreamHandler())
logger.setLevel(logging.INFO)
client_store = {}
client_progress = {}
SERVER_PRIVATE_KEY = 'server_private_key.pem'
private_key = util.get_private_key(SERVER_PRIVATE_KEY)
logged_users = {}
action_progress = {}
'''
TODO:
add key check if the key is legit - sign iv and key
password file to be encrypted with salt
add check if client wants to chat with unknown user (not registered)
check if user online while chat
'''
def parse_data(data):
values = data.split(":")
username = values[0].strip()
A = values[1].strip()