Create lynx_cybersecurity.py

sidra_chain_integration/src/space_exploration/project/Lynx/lynx_cybersecurity/lynx_cybersecurity.py

@@ -0,0 +1,64 @@
+import hashlib
+import hmac
+import os
+import secrets
+from cryptography.fernet import Fernet
+
+class Cybersecurity:
+    def __init__(self, secret_key):
+        self.secret_key = secret_key
+
+    def encrypt(self, data):
+        encrypted_data = hmac.new(self.secret_key.encode(), data.encode(), hashlib.sha256).hexdigest()
+        return encrypted_data
+
+    def decrypt(self, encrypted_data):
+        # Note: HMAC is a one-way hash function, it's not possible to decrypt the data.
+        # This method is just a placeholder and will not work as expected.
+        return encrypted_data
+
+    def generate_key(self):
+        key = Fernet.generate_key()
+        return key
+
+    def symmetric_encrypt(self, data, key):
+        cipher_suite = Fernet(key)
+        encrypted_data = cipher_suite.encrypt(data.encode())
+        return encrypted_data
+
+    def symmetric_decrypt(self, encrypted_data, key):
+        cipher_suite = Fernet(key)
+        decrypted_data = cipher_suite.decrypt(encrypted_data)
+        return decrypted_data.decode()
+
+    def hash_data(self, data):
+        hashed_data = hashlib.sha256(data.encode()).hexdigest()
+        return hashed_data
+
+    def verify_signature(self, data, signature):
+        expected_signature = hmac.new(self.secret_key.encode(), data.encode(), hashlib.sha256).hexdigest()
+        return hmac.compare_digest(signature, expected_signature)
+
+# Example usage:
+secret_key = secrets.token_bytes(32)
+cybersecurity = Cybersecurity(secret_key)
+
+data = "Hello, World!"
+encrypted_data = cybersecurity.encrypt(data)
+print(f"Encrypted data: {encrypted_data}")
+
+key = cybersecurity.generate_key()
+print(f"Generated key: {key}")
+
+symmetric_encrypted_data = cybersecurity.symmetric_encrypt(data, key)
+print(f"Symmetric encrypted data: {symmetric_encrypted_data}")
+
+symmetric_decrypted_data = cybersecurity.symmetric_decrypt(symmetric_encrypted_data, key)
+print(f"Symmetric decrypted data: {symmetric_decrypted_data}")
+
+hashed_data = cybersecurity.hash_data(data)
+print(f"Hashed data: {hashed_data}")
+
+signature = hmac.new(secret_key, data.encode(), hashlib.sha256).hexdigest()
+is_signature_valid = cybersecurity.verify_signature(data, signature)
+print(f"Is signature valid? {is_signature_valid}")