There was an interesting article in the September Dr. Dobb's Jrnl in the
algorithm alley section on an block cipher encryption algorithm called
Blowfish. Its is presented in C, and source is available from compusurve in th
DDJ. The file name is AA995.asc. I tested using SAS 6.55 and encountered only
one problem in the decipher with the assignment of Xl. I needed to add the
correct member Xl.word. A nice and simple algorithm.