First Code and Files

mykeydef.py

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+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.asymmetric import rsa
+from cryptography.hazmat.primitives.asymmetric import padding
+
+def genkeys():
+#Gen Key Pair
+ private_key = rsa.generate_private_key(
+  public_exponent=65537,
+  key_size=4096,
+  backend=default_backend()
+ )
+ public_key = private_key.public_key()
+#Store Private Key
+ pem = private_key.private_bytes(
+  encoding=serialization.Encoding.PEM,
+  format=serialization.PrivateFormat.PKCS8,
+  encryption_algorithm=serialization.NoEncryption()
+ )
+ with open('Keys/private_key.pem', 'wb') as f:
+  f.write(pem)
+#Store Public Key
+ pem = public_key.public_bytes(
+    encoding=serialization.Encoding.PEM,
+    format=serialization.PublicFormat.SubjectPublicKeyInfo
+ )
+ with open('Keys/public_key.pem', 'wb') as f:
+    f.write(pem)
+ return
+
+def loadkeys(private_key, public_key):
+ with open(private_key, "rb") as key_file:
+  private_key = serialization.load_pem_private_key(
+   key_file.read(),
+   password=None,
+   backend=default_backend()
+  )
+ with open(public_key, "rb") as key_file:
+  public_key = serialization.load_pem_public_key(
+   key_file.read(),
+   backend=default_backend()
+  )
+ return public_key,private_key
+
+def mencode(message, public_key):
+ message = message.encode()
+ encrypted = public_key.encrypt(
+  message,
+  padding.OAEP(
+   mgf=padding.MGF1(algorithm=hashes.SHA256()),
+   algorithm=hashes.SHA256(),
+   label=None
+  )
+ )
+ return encrypted
+
+def mdecode(encrypted, private_key):
+ original_message = private_key.decrypt(
+   encrypted,
+   padding.OAEP(
+       mgf=padding.MGF1(algorithm=hashes.SHA256()),
+       algorithm=hashes.SHA256(),
+       label=None
+   )
+ )
+ return original_message