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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