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<H1>[pycrypto] _RSA.py and generate_py</H1>
<B>Dwayne C. Litzenberger</B>
<A HREF="mailto:pycrypto%40lists.dlitz.net?Subject=%5Bpycrypto%5D%20_RSA.py%20and%20generate_py&In-Reply-To=b2a653cf0905272150p302de21esccb9950b249e372f%40mail.gmail.com"
TITLE="[pycrypto] _RSA.py and generate_py">dlitz at dlitz.net
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<I>Mon Aug 3 19:41:50 CST 2009</I>
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<PRE>On Wed, May 27, 2009 at 09:50:07PM -0700, Anthony Honstain wrote:
><i>In the generate_py function of lib/Crypto/PublicKey/_RSA.py , it would
</I>><i>appear to be possible that the the primes p and q can be generated such that
</I>><i>the GCD( 65537, (p-1)(q-1)) != 1 which would result in a unusable key. If
</I>><i>anyone can clarify this it would be greatly appreciated.
</I>
I haven't looked into this claim yet, but I've filed a bug report:
<A HREF="https://bugs.launchpad.net/pycrypto/+bug/408660">https://bugs.launchpad.net/pycrypto/+bug/408660</A>
Note that we'll also have to check _fastmath.c, which might use a different
algorithm.
--
Dwayne C. Litzenberger <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">dlitz at dlitz.net</A>>
Key-signing key - 19E1 1FE8 B3CF F273 ED17 4A24 928C EC13 39C2 5CF7
Annual key (2008) - 4B2A FD82 FC7D 9E38 38D9 179F 1C11 B877 E780 4B45
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