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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 4.16 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)