MEMFROB(3)                          Linux Programmer's Manual                          MEMFROB(3)



NAME
       memfrob - frobnicate (encrypt) a memory area

SYNOPSIS
       #define _GNU_SOURCE             /* See feature_test_macros(7) */
       #include <string.h>

       void *memfrob(void *s, size_t n);

DESCRIPTION
       The  memfrob() function encrypts the first n bytes of the memory area s by exclusive-ORing
       each character with the number 42.  The effect can be reversed by using memfrob()  on  the
       encrypted memory area.

       Note  that  this function is not a proper encryption routine as the XOR constant is fixed,
       and is suitable only for hiding strings.

RETURN VALUE
       The memfrob() function returns a pointer to the encrypted memory area.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The memfrob() function is thread-safe.

CONFORMING TO
       The memfrob() function is unique to the GNU C Library.

SEE ALSO
       strfry(3)

COLOPHON
       This page is part of release 3.74 of the Linux man-pages project.  A  description  of  the
       project,  information  about  reporting  bugs, and the latest version of this page, can be
       found at http://www.kernel.org/doc/man-pages/.



GNU                                         2014-03-17                                 MEMFROB(3)