49 lines
1.9 KiB
Python
49 lines
1.9 KiB
Python
# Python TCP Client A
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import socket
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# Basic cryptography tools
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from cryptography.hazmat.backends import default_backend
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from cryptography.hazmat.primitives.asymmetric import rsa
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# To format created key obj into text to be used/exported
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from cryptography.hazmat.primitives import serialization
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# Home made RSA Utils
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from utils.rsa_tenamortech_utils import *
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from utils.client_keys_manager import *
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host = socket.gethostname()
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port = 2004
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BUFFER_SIZE = 2000
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#MESSAGE = input("tcpClientA: Enter message/ Enter exit:").encode('utf-8')
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MESSAGE = ""
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tcpClientA = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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tcpClientA.connect((host, port))
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got_pub_key_server = False
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(private_key,public_key) = check_for_existing_keys()
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public_key_pem = public_key_serializer(public_key)
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def de_serialize_pub_key(public_key_pem):
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return serialization.load_pem_public_key(public_key_pem,backend=default_backend())
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while MESSAGE != 'exit':
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data = tcpClientA.recv(BUFFER_SIZE)
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if not got_pub_key_server:
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public_key_server = de_serialize_pub_key(data)
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got_pub_key_server = True
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# Now we have the pub key of the server, we will send our pub key too
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#encrypted_public_key = encrypt_msg(public_key_pem, public_key_server)
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encrypted_public_key = encrypt_msg(bytes("test123456789000000000000000000000000000iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii000", 'utf-8'), public_key_server)
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print("Server public key received")
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print("Sending current client public key [ ... ] ")
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tcpClientA.send(encrypted_public_key)
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print("Sending current client public key [ OK ] ")
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else:
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print(" Client2 received data:", data)
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MESSAGE = input("tcpClientA: Enter message to continue/ Enter exit:").encode('utf-8')
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tcpClientA.send(MESSAGE)
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tcpClientA.close()
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