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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
       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
       bstring(3), strfry(3)
COLOPHON
       This  page  is  part of release 4.15 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/.
GNU                               2017-03-13                        MEMFROB(3)