def exchange_keys_with_client(the_connection):
'''
Prompts as to whether to send keys or not
If keys are not sent, program terminates because it is
impossible to encrypt and decrypt messages
'''
try:
# wait to receive client's public key
key = the_connection.recv(8192)
key = key.split(',')
public_key_tuple = (key[0], key[1])
print '[+] Secure Chat Partner\'s Public Key Received\n'
secure_utils.display_processing_cursor("Generating And Exchanging Your Keys")
(n, e, d) = secure_utils.generate_my_keys(MODULUS_N, EXPONENT, MULTIPLICATIVE_INVERSE)
print "[+] Your TRUNCATED Public Key is (****{0},****{1})".format(str(n)[0:5], str(e)[0:5])
print "[+] Your Private Key is hidden"
public_key = str(n) + ',' + str(e)
the_connection.send(public_key)
print '[+] Your Public Key Has Been Sent To The Other Party'
private_key_tuple = (n, d)
return ((public_key_tuple), (private_key_tuple))
except Exception, e:
secure_utils.clear_screen()
print "\n\033[1;41m[+] Error connecting to server or exchanging keys\033[1;m"
raw_input("\nPress [ENTER] To Return To The Main Menu...\n")
return
pass
def exchange_keys_with_server(the_connection):
'''
Prompts as to whether to send keys or not
If keys are not sent, program terminates because it is
impossible to encrypt and decrypt messages
'''
try:
# wait to receive client's public public_key
secure_utils.display_processing_cursor("Generating And Exchanging Keys")
(n, e, d) = secure_utils.generate_my_keys(MODULUS_N, EXPONENT, MULTIPLICATIVE_INVERSE)
print "[+] Your TRUNCATED Public Key is (****{0},****{1})".format(str(n)[0:5], str(e)[0:5])
print "[+] Your Private Key is hidden"
generated_public_key = str(n) + ',' + str(e)
the_connection.send(generated_public_key)
print "[+] Sent Your Public Key To Your Secure Chat Partner"
message_received = the_connection.recv(8192)
if(message_received == "Send Keys"):
message_received = the_connection.recv(8192)
servers_public_key = message_received.split(",")
servers_public_key_tuple = (servers_public_key[0], servers_public_key[1])
print '[+] Server\'s Public Key Received\n'
client_private_key_tuple = (n, d)
return ((servers_public_key_tuple), (client_private_key_tuple))
else:
print "\n\033[1;41m[+] Message Received from server : {0}\033[1;m".format(message_received)
secure_utils.display_processing_cursor("Returning to main menu")
return ((None, None), (None, None))
except Exception, e:
secure_utils.clear_screen()
print "\n\033[1;41m[+] Error connecting to server or exchanging keys\033[1;m"
pass
