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

memfrob - frobnicate (encrypt) a memory area

#define _GNU_SOURCE             /* See feature_test_macros(7) */
#include <string.h>
void *memfrob(void *s, size_t n);

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.

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

For an explanation of the terms used in this section, see attributes(7).
Interface Attribute Value
memfrob () Thread safety MT-Safe

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

bstring(3), strfry(3)
2017-03-13 GNU