memfrob(3) — Linux manual page

memfrob(3)              Library Functions Manual              memfrob(3)

NAME

       memfrob - frobnicate (obfuscate) a memory area

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

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

       void *memfrob(void s[.n], size_t n);

DESCRIPTION

       The memfrob() function obfuscates 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 obfuscated
       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 obfuscated memory
       area.

ATTRIBUTES

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                           │ Attribute     │ Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │ memfrob()                           │ Thread safety │ MT-Safe │
       └─────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       GNU.

SEE ALSO

       bstring(3), strfry(3)

COLOPHON

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-05-02                     memfrob(3)

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

---