First Code and Files

Keys/readme.txt

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+Randome Genaratet RSA Keys with 4096 Bit
+Your Private Key and 
+Your Public Key

PubKeys/daniel156161.pem

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+-----BEGIN PUBLIC KEY-----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+-----END PUBLIC KEY-----

msg_encypt_decrypt.py

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+import mykeydef as key
+from time import sleep
+import binascii
+import string
+import os
+
+private_key = 'Keys/private_key.pem'
+public_key = 'Keys/public_key.pem'
+
+#Make Key if not exist
+if not os.path.exists(private_key):
+  if not os.path.exists(public_key):
+    key.genkeys()
+
+#INPUT
+text=input("Input Text/Encrypted Text: ")
+if all(c in string.hexdigits for c in text) == True:
+    #Decrypt
+    keys=key.loadkeys(private_key,public_key)
+    text = binascii.unhexlify(text)
+    print("")
+    print(key.mdecode(text,keys[1]).decode())
+else:
+    user = input("Username: ")
+    user_public_key ='PubKeys/'+user+'.pem'
+
+    if os.path.exists(user_public_key):
+        print("")
+        keys=key.loadkeys(private_key,user_public_key)
+    else:
+        print("User key Not Found!!!")
+        print("Use Own Private Key")
+        print("")
+        keys=key.loadkeys(private_key,public_key)
+        pass
+    #Encrypt
+    text = key.mencode(text,keys[0])
+    print(binascii.hexlify(text).decode())
+sleep(10)

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