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

strfry(3)

COLOPHON

This page is part of release 4.07 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/.


  Copyright 1993 David Metcalfe (davidprism.demon.co.uk)

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References consulted:
    Linux libc source code
    Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
    386BSD man pages
Modified Sat Jul 24 18:54:45 1993 by Rik Faith (faithcs.unc.edu)