[IronPython] Critical bug in binascii

[Dino Viehland]

Thanks for the bug report, we'll have this one fixed for the next release.

The fix is actually quite trivial if you want to update your copy of IronPython & rebuild.  In IronPython\Modules\binascii.cs the function EncodeHex needs to have its call to AppendFormat be replaced with:

                sb.AppendFormat("{0:x2}", (int)data[i]);

(we're just missing the 2 which guarantees we right out 2 characters all the time).


-----Original Message-----
From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Aude Espesset
Sent: Friday, June 02, 2006 9:19 AM
To: users at lists.ironpython.com
Subject: [IronPython] Critical bug in binascii

Hi all,

I'm trying to read some fields in a binary file and convert them to hexadecimal numbers. The conversion seems to work most of the time but not always. It doesn't crash, it just returns the wrong answer:-(

Here's an example:

*

In CPython :

>>> import binascii

>>> a = '\x00\x00\x10\x00'

>>> b = binascii.b2a_hex(a)

>>> b

'00001000'

>>> int(b,16)

4096



The same thing in IronPython (beta 7):

>>> import binascii

>>> a = '\x00\x00\x10\x00'

>>> b = binascii.b2a_hex(a)

>>> b

'00100'

>>> int(b,16)

256



Aude

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