Tim Henderson wrote:
Hi,
So this may have been asked before but i haven't found the answer by
googling so far. My situation is this:
I want this structure for my code:
@overloaded
def sign_auth(secret, salt, auth_normalized):
return __sign_auth(saltedhash_bin(secret, salt), auth_normalized)
@sign_auth.register(str, str)
def sign_auth(secret_hash_normalized, auth_normalized):
return __sign_auth(qcrypt.denormalize(secret_hash_normalized),
auth_normalized)
def __sign_auth(secret_hash_bin, auth_normalized):
auth = qcrypt.denormalize(auth_normalized)
aes = AES.new(secret_hash_bin, AES.MODE_CBC)
plaintext = aes.decrypt(auth)
ciphertext = qcrypt.normalize(xor_in_pi(plaintext))
if debug:
print '\n------sign_auth------'
print qcrypt.normalize(secret_hash_bin)
print qcrypt.normalize(plaintext)
print ciphertext
print '-----sign_auth-------\n'
return ciphertext
I am using the overloading module from:
http://svn.python.org/view/sandbox/trunk/overload/overloading.py?rev=43727&view=log
However it doesn't actually support this functionality. Does any one
know of a decorator that does this? It would be really nice to have a
unified interface into the __sign_auth function for the two different
use cases.
Are you aware that you can do this kind of thing yourself, without using
a module/decorator.
def sign_auth(*args):
if len(args) == 3:
secret, salt, auth_normalized = args
return __sign_auth(saltedhash_bin(secret, salt), auth_normalized)
elif len(args) == 2:
secret_hash_normalized, auth_normalized = args
return __sign_auth(qcrypt.denormalize(secret_hash_normalized),
auth_normalized)
The checks could be more involved, perhaps checking not jsut the nuimber of
args, but their types, and even their values, before calling __sign_auth(...).
Gary Herron
Tim Henderson
--
http://mail.python.org/mailman/listinfo/python-list
--
http://mail.python.org/mailman/listinfo/python-list