On Mon, 2012-06-18 at 17:58 -0500, Lindsay Haisley wrote: > FWIW, pursuant to Stephen's comments re. using encryption rather than > hashing for passing recipient addresses in headers, I've attached a > short Python script which puts short strings of data, such as an email > address, into an AES cipher.
It looks as if the attachment got stripped. Here's the script, based on information at http://www.codekoala.com/blog/2009/aes-encryption-python-using-pycrypto/ class AEScrypt: from Crypto.Cipher import AES from Crypto.Util import randpool import base64 block_size = 16 key_size = 32 mode = AES.MODE_CBC def genkey(self): key_bytes = self.randpool.RandomPool(512).get_bytes(self.key_size) key_string = self.base64.urlsafe_b64encode(str(key_bytes)) return key_string def encrypt(self, plain_text, key_string): pad = self.block_size - len(plain_text) % self.block_size data = plain_text + pad * chr(pad) iv_bytes = self.randpool.RandomPool(512).get_bytes(self.block_size) encrypted_bytes = iv_bytes + self.AES.new(self.base64.urlsafe_b64decode(key_string), self.mode, iv_bytes).encrypt(data) return self.base64.urlsafe_b64encode(str(encrypted_bytes)) def decrypt(self, cypher_text, key_string): key_bytes = self.base64.urlsafe_b64decode(key_string) encrypted_bytes = self.base64.urlsafe_b64decode(cypher_text) iv_bytes = encrypted_bytes[:self.block_size] encrypted_bytes = encrypted_bytes[self.block_size:] plain_text = self.AES.new(key_bytes, self.mode, iv_bytes).decrypt(encrypted_bytes) pad = ord(plain_text[-1]) return plain_text[:-pad] -- Lindsay Haisley | "In an open world, who needs FMP Computer Services | Windows or Gates" 512-259-1190 | http://www.fmp.com | ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org
