[GNU Crypto] GCJ-friendly Serpent

[Raif S. Naffah]

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hello there,

i just checked in an amended version of the GCJ-friendly Serpent (under 
the gcj/ tree) that implements the required little-endian byte-ordering 
requirement, as described by the algorithm authors in the Serpent 
paper.  with Casey's previous checkin, this concludes the issue of 
Serpent's endianness in GNU Crypto.

i also checked in under etc/ a 'serpent.m4' M4 macros file that i used 
to generate the bulk of the encrypt() and decrypt() methods.  the code 
in the expansion is from Dag Arne's serpent.c.

in time these macros will be used during the auto*/configure process to 
generate the .java class.  for now it has to be done by hand.  to try 
it, do:

   m4 serpent.m4 > serpent.m4.out

you should then see, in the output file, the code referred to above.


cheers;
rsn

ps. many thanks to Dag Arne, for bringing this to our attention and for 
his survey of the existing implementations and their compliance with 
the Serpent paper :-)
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