[Cryptography] GOTO Considered Harmful

[D. Hugh Redelmeier]

| From: Derek Atkins <derek at ihtfp.com>

| Sorry, Patrick, but your code doesn't work, either.

Sorry for being dense: could you explain how it doesn't work?
I'm too lazy to read the code, but surely you must have found a bug so
you ought to point it out.

|  Indeed, your code can
| be made to return success by having 'failed' turned on at the beginning. 

That doesn't count because failed is explicitly set to 0 at the
beginning.  If you can pretend that there is any change anywhere, then
all code doesn't work.