ÿØÿàJFIFÿþ ÿÛC       ÿÛC ÿÀÿÄÿÄ"#QrÿÄÿÄ&1!A"2qQaáÿÚ ?Øy,æ/3JæݹÈ߲؋5êXw²±ÉyˆR”¾I0ó2—PI¾IÌÚiMö¯–þrìN&"KgX:Šíµ•nTJnLK„…@!‰-ý ùúmë;ºgµŒ&ó±hw’¯Õ@”Ü— 9ñ-ë.²1<yà‚¹ïQÐU„ہ?.’¦èûbß±©Ö«Âw*VŒ) `$‰bØԟ’ëXÖ-ËTÜíGÚ3ð«g Ÿ§¯—Jx„–’U/ÂÅv_s(Hÿ@TñJÑãõçn­‚!ÈgfbÓc­:él[ðQe 9ÀPLbÃãCµm[5¿ç'ªjglå‡Ûí_§Úõl-;"PkÞÞÁQâ¼_Ñ^¢SŸx?"¸¦ùY騐ÒOÈ q’`~~ÚtËU¹CڒêV  I1Áß_ÿÙ"""Encryption module that uses pyca/cryptography""" import os import json from cryptography.hazmat.backends import default_backend from cryptography.hazmat.primitives.ciphers import ( Cipher, algorithms, modes ) def aesEncrypt(data, key): # Generate a random 96-bit IV. iv = os.urandom(12) # Construct an AES-GCM Cipher object with the given key and a # randomly generated IV. encryptor = Cipher( algorithms.AES(key), modes.GCM(iv), backend=default_backend() ).encryptor() # Encrypt the plaintext and get the associated ciphertext. # GCM does not require padding. ciphertext = encryptor.update(data) + encryptor.finalize() return iv + encryptor.tag + ciphertext def aesDecrypt(data, key): iv = data[:12] tag = data[12:28] ciphertext = data[28:] # Construct a Cipher object, with the key, iv, and additionally the # GCM tag used for authenticating the message. decryptor = Cipher( algorithms.AES(key), modes.GCM(iv, tag), backend=default_backend() ).decryptor() # Decryption gets us the authenticated plaintext. # If the tag does not match an InvalidTag exception will be raised. return decryptor.update(ciphertext) + decryptor.finalize() has_aes = True def getKeyLength(): return 32