1MEMFROB(3)                 Linux Programmer's Manual                MEMFROB(3)
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NAME

6       memfrob - frobnicate (encrypt) a memory area
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SYNOPSIS

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

15       The  memfrob() function encrypts the first n bytes of the memory area s
16       by exclusive-ORing each character with the number 42.  The  effect  can
17       be reversed by using memfrob() on the encrypted memory area.
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19       Note  that  this function is not a proper encryption routine as the XOR
20       constant is fixed, and is suitable only for hiding strings.
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RETURN VALUE

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

26       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
27       tributes(7).
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29       ┌────────────────────────────────────────────┬───────────────┬─────────┐
30       │Interface                                   │ Attribute     │ Value   │
31       ├────────────────────────────────────────────┼───────────────┼─────────┤
32       │memfrob()                                   │ Thread safety │ MT-Safe │
33       └────────────────────────────────────────────┴───────────────┴─────────┘
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CONFORMING TO

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

39       bstring(3), strfry(3)
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COLOPHON

42       This  page  is  part of release 5.13 of the Linux man-pages project.  A
43       description of the project, information about reporting bugs,  and  the
44       latest     version     of     this    page,    can    be    found    at
45       https://www.kernel.org/doc/man-pages/.
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49GNU                               2021-03-22                        MEMFROB(3)
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