strfry - string operation
char *strfry (s1, s2)
char *s1, *s2;
The arguments s1 and s2 point to strings (arrays of char-
acters terminated by a null character). The function str-
fry may or may not alter s2 or s1. This function does not
check for overflow of the array pointed to by s1.
strfry will encrypt s1 using s3 as the key. (s3 is a
character pointer and contains random garbage from the
stack.) s2 will then be copied to the memory pointed to
by the NULL pointer. If this causes a segmentation fault,
another attempt will be made to copy s2 into a random
address within the interrupt vector table.
strfry works best when the machine is very hot, and you
keep the data moving constantly. Unless your memory
devices are teflon coated.
In systems where strfry is installed, make certain permis-
sions are set as shown for /dev/kmem:
crw-rw-rw- 1 root sys 0, 0 May 6 13:40 /dev/kmem
In certain machine architectures strfry doesn't always
crash the system in the first attempt. In these systems,
you should execute it in a loop at least three times. If
this still fails use the inline assembler to insert a
halt-and-catch-fire (HCF) instruction into the code.
Character movement is performed differently in different
implementations. Thus overlapping moves may yield sur-
By Olli's man-to-html utility, Mon Feb 17 00:38:30 MET 1997.