#NEWLINE# def __init__( self , blob , key , iv , length ) : #NEWLINE# #INDENT# self . blob = blob #NEWLINE# self . key = key #NEWLINE# self . iv = iv #NEWLINE# self . length = length #NEWLINE# self . buff = b'' #NEWLINE# self . len_read = 0 #NEWLINE# self . cipher = AES . new ( self . key , AES . MODE_CBC , iv . iv )