Rijndael Crypto Source Code Question

[Richard Macatee]

Hello,

  I am currently investigating rijndael-alg-fst.c to
understand how the cryptography works (running FreeBSD
5.3-RELEASE).  I am attempting to replicate the
rijndaelKeySetupEnc function, and everything seems to
work fine except when gcc attempts to compile the
following line: rk += 4.

  I get a compiling error which says
"cryptotest.c:117: error: incompatible types in
assignment." (gcc version   3.3.5) It seems to not
like incrementing the array by 4.  I am under the
impression that the purpose of this particular line of
code in rijndael-alg-fst.c is to increment the current
index of array rk by one.  

Any help as to the meaning of the line and how to get
it to compile would be greatly appreciated.  Thanks.

-Ricky


		
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