Self Preservation

#   Consider your smartphone a fortress, fortified by a sophisticated guardian – the intricate code we're exploring. This code, rooted in advanced cryptographic methodologies, forms a robust defense mechanism, ensuring user-end security in today's complex digital landscape.

#   At its cryptographic core is RSA encryption, a pivotal asymmetric key algorithm that shrouds messages with a private key, rendering them accessible only to the designated recipient with the corresponding public key. This cryptographic bedrock establishes the foundation for safeguarding user communication, enhancing confidentiality.

#   Simultaneously, the tool harnesses AES encryption, employing GCM (Galois/Counter Mode) and EAX (Authenticated Encryption with Associated Data) modes. This symmetric key approach transforms message data into cryptographically secure codes, not only encrypting but also ensuring data authenticity. This layered approach fortifies the integrity of user communications, ensuring that messages remain confidential and unaltered during transmission.

#   The tool orchestrates a secure key exchange, analogous to a cryptographic handshake, certifying that only authenticated parties possess the requisite keys for communication. The integration of Perfect Forward Secrecy (PFS) introduces a dynamic key generation mechanism for each session, mitigating risks associated with compromising past or future communications. This adaptive resilience enhances the overall security posture.

#   To augment data integrity, hash functions such as SHA-256 generate unique identifiers for transmitted information, acting as a digital seal to verify contents. In the user's realm, the tool serves as an adaptive digital armor for Android devices, delivering an unparalleled level of security. It safeguards sensitive applications, such as those linked to banking or social media, where privacy is paramount.

#   In the intricate tapestry of today's cyber threats, this tool emerges as a stalwart defender of user privacy. Its multifaceted security features encompass encryption, authentication, dynamic key exchange, and adaptive resilience, ensuring users can engage in digital interactions with confidence. This technical foundation not only fortifies the nontechnical understanding but also underscores the tool's role as an advanced guardian, actively preserving personal data in our tech-driven world.

#   Ultra Secure Messaging Tool

#   The Ultra Secure Messaging Tool represents a paradigm shift in secure communication, combining cutting-edge cryptographic techniques to fortify everyday conversations and social media interactions. This comprehensive report provides an in-depth exploration of the tool's user-friendly features, technical underpinnings, and its seamless integration into various digital scenarios.

#   User-Friendly Features

#   1. Private Chats:                           - Technical Insight: Leveraging RSA encryption, the tool ensures private conversations remain confidential. Asymmetric encryption provides a secure method for encrypting and decrypting messages, enhancing user privacy.

#   2. File Guard:                              - Technical Insight: Utilizing Advanced Encryption Standard (AES), the tool secures files and media shared during conversations. AES symmetric encryption balances speed and efficiency for robust content protection.

#   Boosting Social Media Security:

#   1. Secret Messages:                         - Technical Insight: Employing RSA encryption enhances the security of messages before posting on social media platforms. This safeguards content integrity, even in the face of potential platform vulnerabilities.

#   2. Extra Privacy:                           - Technical Insight: The integration of Authenticated Encryption with Associated Data (AEAD) adds an extra layer of privacy by verifying message authenticity. This ensures that messages are not only confidential but also tamper-resistant.

#   Sandbox Integration:

#   1. Private Chat Space:                      - Technical Insight: The tool establishes an isolated environment using Perfect Forward Secrecy (PFS). This dynamic key generation mechanism enhances security by reducing the impact of long-term key compromises.

#   2. Your Rules for Security:                 - Technical Insight: Customizable security protocols empower users to tailor the level of security based on their preferences. Key exchange protocols provide granular control over cryptographic key sharing, enhancing overall security control.

#   3. Key Swap Control:                        - Technical Insight: Secure key exchange protocols ensure that only authorized parties possess the keys required for message decryption. This feature enhances control over communication security, particularly during key exchange processes.

#   Integration Perks:

#   1. Works Everywhere:                        - Technical Insight: The tool's platform agnosticism allows seamless integration with various social media platforms. This ensures consistent security measures across diverse digital environments.

#   2. Easy Peasy for Everyone:                 - Technical Insight: Despite its advanced cryptographic features, the tool maintains a user-friendly interface. This design ensures accessibility for users with varying technical expertise levels, promoting widespread adoption.

#   3. Stay One Step Ahead:                     - Technical Insight: By utilizing RSA and AES encryption, users proactively address security concerns, setting a new standard for secure communication environments. This tool empowers users to prioritize digital privacy in an era where it is of paramount importance.

#   The Ultra Secure Messaging Tool stands as a testament to the fusion of advanced cryptographic principles with user-friendly design, providing a robust solution for securing everyday conversations and social media interactions. Its deployment ensures a heightened level of digital privacy and security, redefining the expectations for secure communication tools in contemporary digital landscapes.

import rsa
import hashlib
from Cryptodome.Cipher import AES
from Cryptodome.Random import get_random_bytes
import socket
import threading
import os
from typing import Optional, Tuple

class UltraSecureMessagingTool:
    def __init__(self, private_key_path: str, public_key_path: str, server_address: Optional[Tuple[str, int]] = ('localhost', 8080)):
        with open(private_key_path, 'r') as p:
            self.private_key = rsa.PrivateKey.load_pkcs1(p.read().encode())

        with open(public_key_path, 'r') as p:
            self.public_key = rsa.PublicKey.load_pkcs1(p.read().encode())

        self.server_address = server_address
        self.listen_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.listen_socket.bind(self.server_address)
        self.listen_socket.listen(5)

    def rsa_encrypt(self, data: str) -> bytes:
        return rsa.encrypt(data.encode(), self.public_key)

    def rsa_decrypt(self, encrypted_data: bytes) -> str:
        return rsa.decrypt(encrypted_data, self.private_key).decode()

    def aes_encrypt(self, data: str, key: bytes, nonce: bytes) -> bytes:
        cipher = AES.new(key, AES.MODE_GCM, nonce=nonce)
        ciphertext, tag = cipher.encrypt_and_digest(data.encode())
        return cipher.nonce + tag + ciphertext

    def aes_decrypt(self, encrypted_data: bytes, key: bytes, nonce: bytes) -> str:
        cipher = AES.new(key, AES.MODE_GCM, nonce=nonce)
        data = cipher.decrypt(encrypted_data[AES.block_size:])
        return data.decode()

    def hash_data(self, data: str) -> str:
        return hashlib.sha256(data.encode()).hexdigest()

    def secure_key_exchange(self) -> Tuple[bytes, bytes]:
        alice_key = get_random_bytes(32)
        bob_key = get_random_bytes(32)
        return alice_key, bob_key

    def perfect_forward_secrecy(self, key: bytes, nonce: bytes) -> bytes:
        cipher = AES.new(key, AES.MODE_EAX, nonce=nonce)
        return cipher.nonce

    def authenticated_encryption(self, data: str, key: bytes, nonce: bytes) -> bytes:
        cipher = AES.new(key, AES.MODE_EAX, nonce=nonce)
        ciphertext, tag = cipher.encrypt_and_digest(data.encode())
        return cipher.nonce + tag + ciphertext

    def secure_protocol(self, client_socket: socket.socket, key: bytes, nonce: bytes) -> None:
        data = client_socket.recv(1024)
        encrypted_data = self.aes_decrypt(data, key, nonce)
        decrypted_data = self.rsa_decrypt(encrypted_data)
        print(f'Received securely: {decrypted_data}')

    def handle_connection(self, client_socket: socket.socket) -> None:
        alice_key, bob_key = self.secure_key_exchange()
        client_socket.send(alice_key)

        nonce_received = get_random_bytes(16)
        client_socket.send(nonce_received)
        nonce = self.perfect_forward_secrecy(bob_key, nonce_received)

        data = "Hello from the server!"
        encrypted_data = self.rsa_encrypt(data)
        secure_data = self.authenticated_encryption(encrypted_data, bob_key, nonce)
        client_socket.send(secure_data)

        self.secure_protocol(client_socket, bob_key, nonce)
        client_socket.close()

    def communicate(self) -> None:
        while True:
            client_socket, _ = self.listen_socket.accept()
            connection_thread = threading.Thread(target=self.handle_connection, args=(client_socket,))
            connection_thread.start()

    def encrypt_self(self, filename: str) -> None:
        with open(filename, 'rb') as f:
            plaintext = f.read()

        key = get_random_bytes(32)
        nonce = get_random_bytes(16)
        encrypted_data = self.aes_encrypt(plaintext.decode(), key, nonce)

        with open(filename, 'wb') as f:
            f.write(key + nonce + encrypted_data)

    def help_menu(self) -> None:
        print("""
        Ultra Secure Messaging Tool - Help

        Available Commands:
        1. help: Show this help menu.
        2. communicate: Start listening for incoming connections.
        3. encrypt_self <filename>: Encrypt the content of a file using AES.
        4. send_message <message>: Send an encrypted message to a connected client.
        5. exit: Terminate the tool.

        Example Usage:
        - To start listening for connections: communicate
        - To encrypt a file: encrypt_self example.txt
        - To send a message: send_message "Hello, Client!"
        """)

    def send_message(self, message: str, client_socket: socket.socket, key: bytes, nonce: bytes) -> None:
        encrypted_message = self.authenticated_encryption(message, key, nonce)
        client_socket.send(encrypted_message)

    def start(self) -> None:
        communication_thread = threading.Thread(target=self.communicate)
        self_encrypt_thread = threading.Thread(target=self.encrypt_self, args=('self_encrypt_seed.py',))

        communication_thread.start()
        self_encrypt_thread.start()

        while True:
            user_input = input("Enter a command: ")

            if user_input == 'help':
                self.help_menu()

            elif user_input == 'communicate':
                print("Listening for incoming connections...")

            elif user_input.startswith('encrypt_self'):
                filename = user_input.split(' ')[1]
                self.encrypt_self(filename)
                print(f"{filename} encrypted successfully.")

            elif user_input.startswith('send_message'):
                message = user_input.split(' ', 1)[1]
                # Implement client connection and key exchange logic
                client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                client_socket.connect(('localhost', 8080))
               # Implement the secure protocol for key exchange
                alice_key, _ = self.secure_key_exchange()
                client_socket.send(alice_key)

                nonce_received = get_random_bytes(16)
                client_socket.send(nonce_received)
                nonce = self.perfect_forward_secrecy(alice_key, nonce_received)

                # Send the encrypted message
                self.send_message(message, client_socket, alice_key, nonce)
                print(f"Message sent: {message}")

            elif user_input == 'exit':
                print("Terminating the tool.")
                self.listen_socket.close()
                exit()

            else:
                print("Invalid command. Type 'help' for available commands.")

# Initialize the Ultra Secure Messaging Tool with network configuration
tool = UltraSecureMessagingTool('private_key.pem', 'public_key.pem', server_address=('localhost', 8080))
tool.start()