Kayode Odeyemi wrote:
> On Sat, Oct 8, 2011 at 12:50 AM, Terry Reedy <tjre...@udel.edu> wrote:
>
>> That latter function probably want integers code in range(256).
>
>
> Yes! Non-unicode. The source reads:
>
> def _encrypt(self, m):
> # compute m**d (mod n)
> return pow(m, self.e, self.n)
>
>>From the source, it is provided as is.
>
> The arguments must have numeric types
>>
>
> How come it accepts str type?
pow() does not accept a str. Most likely there is conversion code similar to
if isinstance(m, str):
m = convert_to_int(m)
that precedes the _encrypt() method call and lets unicode slip through.
Grepping through the PyCrypto source for isinstance indeed finds a few
candidates. Example:
$ find . -name \*.py | xargs grep isinstance -A5
[...]
./PublicKey/pubkey.py: if isinstance(plaintext, types.StringType):
./PublicKey/pubkey.py- plaintext=bytes_to_long(plaintext) ;
wasString=1
./PublicKey/pubkey.py: if isinstance(K, types.StringType):
./PublicKey/pubkey.py- K=bytes_to_long(K)
./PublicKey/pubkey.py- ciphertext=self._encrypt(plaintext, K)
./PublicKey/pubkey.py- if wasString: return tuple(map(long_to_bytes,
ciphertext))
./PublicKey/pubkey.py- else: return ciphertext
./PublicKey/pubkey.py-
[...]
--
http://mail.python.org/mailman/listinfo/python-list
