memfrob(3) - Linux manual page (original) (raw)

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)](../man7/attributes.7.html).
   ┌──────────────────────────────────────┬───────────────┬─────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├──────────────────────────────────────┼───────────────┼─────────┤
   │ **memfrob**()                            │ Thread safety │ MT-Safe │
   └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS top

   GNU.

SEE ALSO top

   [bstring(3)](../man3/bstring.3.html), [strfry(3)](../man3/strfry.3.html)

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)