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.

COLOPHON

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