Provide examples how to encode mail address with PHP, decrypt in python, using standard AES for use as local proxy for libravatar image requests

encrypted_proxy/lib/MyCypher.py

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+#!/usr/bin/env python2
+#encoding: UTF-8
+
+# Code kindly borrowed from:
+# https://github.com/arajapandi/php-python-encrypt-decrypt
+
+# Python Class for AES encryption
+"""
+    Example Usage
+    enc_str = cipher.encrypt('secret')
+    enc_str = cipher.decrypt(enc_str)
+    print(enc_str); #secret
+"""
+
+from Crypto.Cipher import AES
+import base64
+import hashlib
+import sys
+
+class MyCypher:
+    # Default Key for encryption
+    rawkey      = 'asdfa923aksadsYahoasdw998sdsads'
+    method      = AES.MODE_CFB
+    blocksize   = 32  # 16, 32..etc
+    padwith     = '`'.encode('utf-8') # padding value for string  
+    
+    #lambda function for padding
+    pad         = lambda self, s: s + (self.blocksize - len(s) % self.blocksize) * self.padwith
+    
+    """
+    construct for cypher class - get, set key and iv
+    """
+    def __init__(self, iv, key=''):
+        
+        if(not key): 
+            key = self.rawkey
+            
+        self.key    = key.encode('utf-8')
+        self.iv     = iv.encode('utf-8')
+    
+    """
+    get hased key - if key is not set on init, then default key wil be used
+    """
+    def getKEY(self):
+        if(not self.key):
+            sys.exit()
+            
+        return hashlib.sha256(self.key).hexdigest()[:32]
+    
+    """
+    get hashed IV value - if no IV values then it throw error
+    """
+    def getIV(self):
+        if(not self.iv):
+            sys.exit()
+            
+        self.iv = self.iv
+        return hashlib.sha256(self.iv).hexdigest()[:16]
+    
+    """
+    Encrypt given string using AES encryption standard
+    """
+    def encrypt(self, raw):
+        cipher = AES.new(self.getKEY(), self.method, self.getIV(), segment_size=128)
+        return base64.b64encode(cipher.encrypt(self.pad(raw)))
+    
+    """
+    Decrypt given string using AES standard
+    """
+    def decrypt(self, encrypted):
+        encrypted = base64.b64decode(encrypted)
+        cipher = AES.new(self.getKEY(), self.method, self.getIV(), segment_size=128)
+        return cipher.decrypt(encrypted).rstrip(self.padwith)