Something other than AES, yes. Perhaps ECE (elliptic curve encryption) or
something other than AES. Shouldn't I have a choice?
On Tuesday, June 25, 2013 1:36:56 PM UTC-7, Niphlod wrote:
>
> because you want something else from AES ?
>
> On Tuesday, June 25, 2013 10:31:47 PM UTC+2, Derek wrote:
>>
>> Only if there is an optional algorithm argument.
>>
>> On Tuesday, June 25, 2013 1:23:32 PM UTC-7, Massimo Di Pierro wrote:
>>>
>>> Should we include decrypt(key,data) and encrypt(key,data) in gluon.utils?
>>>
>>> On Tuesday, 25 June 2013 13:42:29 UTC-5, Niphlod wrote:
>>>>
>>>> sorry, cut&paste error.
>>>>
>>>>
>>>>
>>>> import gluon.contrib.aes as AES
>>>> import threading
>>>> import os
>>>> import base64
>>>>
>>>> def fast_urandom16(urandom=[], locker=threading.RLock()):
>>>> """
>>>> this is 4x faster than calling os.urandom(16) and prevents
>>>> the "too many files open" issue with concurrent access to
>>>> os.urandom()
>>>> """
>>>> try:
>>>> return urandom.pop()
>>>> except IndexError:
>>>> try:
>>>> locker.acquire()
>>>> ur = os.urandom(16 * 1024)
>>>> urandom += [ur[i:i + 16] for i in xrange(16, 1024 * 16, 16
>>>> )]
>>>> return ur[0:16]
>>>> finally:
>>>> locker.release()
>>>>
>>>> def pad(s, n=32, padchar=' '):
>>>> return s + (32 - len(s) % 32) * padchar
>>>>
>>>> def AES_new(key, IV=None):
>>>> """ Returns an AES cipher object and random IV if None specified
>>>> """
>>>> if IV is None:
>>>> IV = fast_urandom16()
>>>>
>>>> return AES.new(key, AES.MODE_CBC, IV), IV
>>>>
>>>> def w2p_encrypt(data):
>>>> key = 'asdsaddasdasdas'
>>>> key = pad(key[:32])
>>>> cipher, IV = AES_new(key)
>>>> encrypted_data = IV + cipher.encrypt(pad(data))
>>>> return base64.urlsafe_b64encode(encrypted_data)
>>>>
>>>> def w2p_decrypt(data):
>>>> key = 'asdsaddasdasdas'
>>>> key = pad(key[:32])
>>>> data = base64.urlsafe_b64decode(data)
>>>> IV, data = data[:16], data[16:]
>>>> cipher, _ = AES_new(key, IV=IV)
>>>> data = cipher.decrypt(data)
>>>> data = data.rstrip(' ')
>>>> return data
>>>>
>>>> db.define_table('t_test',
>>>> Field('f_field')
>>>> )
>>>>
>>>> db.t_test.f_field.filter_in = lambda value : w2p_encrypt(value)
>>>> db.t_test.f_field.filter_out = lambda value : w2p_decrypt(value)
>>>>
>>>>
>>>>
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