changed .hex() to binascii.hexlify() to stay compatible with python 3.4

Author: Cyber1000

.travis.yml

@@ -1,5 +1,6 @@
 language: python
 python:
+    - "3.4"
     - "3.5"
     - "3.6"
     - "3.7"

pyairctrl/coap_client.py

@@ -106,7 +106,7 @@ def _encrypt_payload(self, payload):
         self._update_client_key()
         aes = self._handle_AES(self.client_key)
         paded_message = pad(bytes(payload.encode("utf8")), 16, style="pkcs7")
-        encoded_message = aes.encrypt(paded_message).hex().upper()
+        encoded_message = binascii.hexlify(aes.encrypt(paded_message)).decode("utf8").upper()
         digest = self._create_digest(self.client_key, encoded_message)
         return self.client_key + encoded_message + digest
 

testing/coap_resources.py

@@ -2,6 +2,7 @@
 import os
 import json
 import hashlib
+import binascii
 from Cryptodome.Cipher import AES
 from Cryptodome.Util.Padding import pad, unpad
 from coapthon.resources.resource import Resource
@@ -81,7 +82,7 @@ def render_GET_advanced(self, request, response):
     def _encrypt_payload(self, payload):
         aes = self._handle_AES(self.encryption_key)
         paded_message = pad(bytes(payload.encode("utf8")), 16, style="pkcs7")
-        encoded_message = aes.encrypt(paded_message).hex().upper()
+        encoded_message = binascii.hexlify(aes.encrypt(paded_message)).decode("utf8").upper()
         digest = self._create_digest(self.encryption_key, encoded_message)
         return self.encryption_key + encoded_message + digest
 

testing/http_test_controller.py

@@ -4,6 +4,7 @@
 import json
 import random
 import os
+import binascii
 import flask
 from Cryptodome.Cipher import AES
 from Cryptodome.Util.Padding import pad, unpad
@@ -75,7 +76,10 @@ def security(self):
         session_key_encrypted = self._encrypt(self._device_key, s_bytes)
 
         data = json.dumps(
-            {"key": session_key_encrypted.hex(), "hellman": format(B, "x")}
+            {
+                "key": binascii.hexlify(session_key_encrypted).decode("utf8"),
+                "hellman": format(B, "x"),
+            }
         )
         data_enc = data.encode("ascii")