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infidel-code/py_wrappers/Subscribe_Encrypted.py

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+import paho.mqtt.client as paho
+# from simplecrypt import encrypt, decrypt
+from cryptography.fernet import Fernet
+import base64
+import _ctypes
+from ctypes import *
+from textwrap import wrap
+
+
+# Konfigurasi MQTT server
+broker = "nnag.xyz"
+client = paho.Client()
+port = 1883
+
+
+def u_decrypt(arg):
+    print("Cipher Length                        : ", len(arg))
+    so_file2 = './EES593/URG_decrypt.so'
+    u_dec = CDLL(so_file2)
+    u_dec.main.restype = c_char_p
+    u_dec.main.argtype = c_char_p
+    c_return = u_dec.main(arg)
+    _ctypes.dlclose(u_dec._handle)
+    # print("Python Log, C RETURN TYPE : ", type(c_return))
+    return c_return.decode('ascii')
+
+def file_handler(f_name, num):
+    num = str(num).zfill(2)
+    f = open("./cipher/"+f_name+"_"+num+".dat", "rb")
+    f_val = f.read()
+    f.close()
+    return f_val
+
+def write_handler(f_name, num, arg):
+    num = str(num).zfill(2)
+    f = open("./cipher/"+f_name+"_"+num+".dat", "wb")
+    f.write(arg)
+    f.close()
+
+def rsa_file_handler(f_name, num):
+    num = str(num).zfill(2)
+    f = open("./cipher/"+f_name+"_"+num+".dat", "rb")
+    f_val = f.read()
+    return f.val
+
+def on_connect(client, userdata, flags, rc):
+    print("Connected with result code "+str(rc))
+    client.subscribe("device01/msg")
+
+#Proses enkripsi
+def payload_process(msg):
+    if len(msg) > 736:
+        msg_arr = wrap(msg, 736)
+        dec_msg_arr = []
+        for i in range(len(msg_arr)):
+            msg = base64.b64decode(msg_arr[i])
+            # print("=====[ Decryption Sequence "+str(i+1)+" ]=================")
+            dec_msg = u_decrypt(msg)
+            dec_msg_arr.append(dec_msg)
+            # print("C Return String                  : ", dec_msg )
+        final_msg = ''.join(dec_msg_arr)
+    else:
+        msg = base64.b64decode(msg)
+        final_msg = u_decrypt(msg)
+    return final_msg
+
+def on_message(client, userdata, msg):
+    # print("========================================")
+    # print("Topic            : ", msg.topic)
+    # print("QOS              : ", msg.qos)
+    # print("Payload          : ", msg.payload)
+    msg = msg.payload.decode()
+    if len(msg) != 0:
+        # all_data = msg.split('&', 1)
+        # user_ip = all_data[0]
+        # msg = all_data[1]
+        # print("Publisher  : ",user_ip)
+        print("====[ Result ]=======================")
+        print("Incomming Message Length             : ", len(msg))
+        # print("Incomming Message Type           : ", type(msg))
+        real_data = payload_process(msg)
+        # real_data = real_data[1]
+        print("Decryption Result (Plaintext)        : ", real_data)
+        print("Result Length                        : ", len(real_data))
+        print(" ")
+        return real_data
+
+base_name = "cipher"
+base_name_RSA3 = "RSA_3072"
+base_name_RSA7 = "RSA_7680"
+
+client.connect(broker,port)
+client.on_connect = on_connect
+client.on_message = on_message
+client.loop_forever()