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

   For  an  explanation  of  the  terms  used   in   this   section,   see
   attributes(7).

   
   Interface  Attribute      Value   
   
   memfrob()  Thread safety  MT-Safe 
   

CONFORMING TO

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

SEE ALSO

   strfry(3)

COLOPHON

   This  page  is  part of release 4.09 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
   https://www.kernel.org/doc/man-pages/.

---

Free and Open Source Software