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+ <H1>[pycrypto] Typo or bug?</H1>
+ <B>Dave Pawson</B>
+ <A HREF="mailto:pycrypto%40lists.dlitz.net?Subject=Re%3A%20%5Bpycrypto%5D%20Typo%20or%20bug%3F&In-Reply-To=%3CCAEncD4dw9T-fByufTh-XwoWMAAGmM3SfAiKMtjDSX88zV5bcXg%40mail.gmail.com%3E"
+ TITLE="[pycrypto] Typo or bug?">dave.pawson at gmail.com
+ </A><BR>
+ <I>Tue Jun 26 06:19:49 EDT 2012</I>
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+<PRE>On 26 June 2012 10:52, Legrandin &lt;<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">gooksankoo at hoiptorrow.mailexpire.com</A>&gt; wrote:
+&gt;&gt;<i> &#160; encobj = AES.new(secret, AES.MODE_CFB)
+</I>&gt;&gt;<i> &#160; File &quot;/usr/lib64/python2.7/site-packages/Crypto/Cipher/blockalgo.py&quot;,
+</I>&gt;&gt;<i> line 141, in __init__
+</I>&gt;&gt;<i> &#160; self._cipher = factory.new(key, *args, **kwargs)
+</I>&gt;&gt;<i> ValueError: IV must be 16 bytes long
+</I>&gt;&gt;<i>
+</I>&gt;&gt;<i> So although the 'secret' is 16 bytes long, I'm getting a report saying it
+</I>&gt;&gt;<i> isn't?
+</I>&gt;&gt;<i>
+</I>&gt;<i>
+</I>&gt;<i> Hi Dave,
+</I>&gt;<i>
+</I>&gt;<i> The key is OK, but the IV is missing and it is mandatory for CFB.
+</I>&gt;<i> Your code should be:
+</I>&gt;<i>
+</I>&gt;<i> encobj = AES.new(secret, AES.MODE_CFB, some_iv)
+</I>&gt;<i>
+</I>&gt;<i> where len(some_iv)==16.
+</I>
+Next question (bet you saw this coming)...
+some_iv? Any explanation of this call please?
+What should it be?
+
+
+Sorry to sound so newbie... This code has worked well for a year or more?
+
+
+TIA
+
+
+
+
+
+--
+Dave Pawson
+XSLT XSL-FO FAQ.
+Docbook FAQ.
+<A HREF="http://www.dpawson.co.uk">http://www.dpawson.co.uk</A>
+</PRE>
+
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