memfrob(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON

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

NAME         top

       memfrob - frobnicate (encrypt) a memory area

SYNOPSIS         top

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

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

DESCRIPTION         top

       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         top

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

ATTRIBUTES         top

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

       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │Interface                             Attribute     Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │memfrob()                             │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO         top

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

SEE ALSO         top

       bstring(3), strfry(3)

COLOPHON         top

       This page is part of release 5.12 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                            2021-03-22                     MEMFROB(3)

Pages that refer to this page: bstring(3)strfry(3)