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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