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<H1>[pycrypto] Typo or bug?</H1>
<B>Legrandin</B>
<A HREF="mailto:pycrypto%40lists.dlitz.net?Subject=Re%3A%20%5Bpycrypto%5D%20Typo%20or%20bug%3F&In-Reply-To=%3CCAGfyce1rtehF8rrk0D7Edx0uMS4%2B2CbF_8sEdsdt_%3D7_t8dv3Q%40mail.gmail.com%3E"
TITLE="[pycrypto] Typo or bug?">gooksankoo at hoiptorrow.mailexpire.com
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<I>Tue Jun 26 05:52:50 EDT 2012</I>
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<PRE>><i>
</I>><i> encobj = AES.new(secret, AES.MODE_CFB)
</I>><i> File "/usr/lib64/python2.7/site-packages/Crypto/Cipher/blockalgo.py",
</I>><i> line 141, in __init__
</I>><i> self._cipher = factory.new(key, *args, **kwargs)
</I>><i> ValueError: IV must be 16 bytes long
</I>><i>
</I>><i> So although the 'secret' is 16 bytes long, I'm getting a report saying it
</I>><i> isn't?
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</I>><i>
</I>Hi Dave,
The key is OK, but the IV is missing and it is mandatory for CFB.
Your code should be:
encobj = AES.new(secret, AES.MODE_CFB, some_iv)
where len(some_iv)==16.
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