memfrob(3) — Linux manual page

memfrob(3)               Library Functions Manual              memfrob(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(void s[.n], size_t n);

DESCRIPTION         top

       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         top

       The memfrob() function returns a pointer to the obfuscated 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 │
       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS         top

       GNU.

SEE ALSO         top

       bstring(3), strfry(3)

COLOPHON         top

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Linux man-pages 6.10            2024-07-23                     memfrob(3)

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

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