If you build the source of the applet, you can make getchallenge to build (and 
work).
 
I dont really recall well, but I think I had to rewrite much of the applet's 
sign/verify/crypt functions to make them viable.
 
 



> Date: Fri, 21 Mar 2008 18:04:24 +0100> From: [EMAIL PROTECTED]> To: 
> [email protected]> Subject: Re: [Muscle] Impossible to crypt using 
> MuscleTool> > Hi Amanda,> > Great! I will check that log, and back soon with 
> analysis.> > > Regarding the Get Challenge: a part of the response was in my 
> comment > regarding the ACL.> The 8 bits of the internal security state are 
> described as "strong > authentication" as opposed to the 8 lower bits that 
> store PIN > verification results.> > A "strong authentication" is symmetric 
> key based and consists in a Get > Challenge, External Authenticate sequence 
> (the terminal shall requests a > challenge and send it ciphered with a symm. 
> key in the data field of a > subsequent External Auth. command).> > But the 
> 0.9.8 applet does not support such "strong authentication" ! > meaning that 
> both Get Challenge & External Auth commands return > "instruction not 
> supported" '6D00'.> > OOH, Get Challenge is not supposed to participate to 
> any data encryption > / decryption scheme. So you should not be worried about 
> that > (unsupported) command.> > Cheers,> Sylvain.> > > Amanda Ortega a écrit 
> :> > The sequence of APDUS obtained through pcscd -fda to the same sequence > 
> > of encrypt/decrypt is:> >> > > > 
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