memfrob

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



NAME
       memfrob - frobnicate (encrypt) a memory area

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

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

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

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

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

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

SEE ALSO
       bstring(3), strfry(3)

COLOPHON
       This page is part of release 5.13 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)