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memfrob(3) — Linux manual page

memfrob(3)               Library Functions Manualmemfrob(3)

NAME        top

       memfrob - frobnicate (obfuscate) a memory area

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#define _GNU_SOURCE/* See feature_test_macros(7) */#include <string.h>void *memfrob(size_t n;voids[n], size_tn);

DESCRIPTION        top

       Thememfrob() function obfuscates the firstn bytes of the memory       areas by exclusive-ORing each character with the number 42.  The       effect can be reversed by usingmemfrob() 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        top

       Thememfrob() function returns a pointer to the obfuscated memory       area.

ATTRIBUTES        top

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

STANDARDS        top

       GNU.

SEE ALSO        top

bstring(3),strfry(3)

COLOPHON        top

       This page is part of theman-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-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  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 isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-06-28memfrob(3)

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

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