memfrob(3)

1memfrob(3)                 Library Functions Manual                 memfrob(3)
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NAME

6       memfrob - frobnicate (obfuscate) a memory area
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LIBRARY

9       Standard C library (libc, -lc)
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SYNOPSIS

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

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

26       The memfrob() function returns a pointer to the obfuscated memory area.
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ATTRIBUTES

29       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
30       tributes(7).
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32       ┌────────────────────────────────────────────┬───────────────┬─────────┐
33       │Interface                                   │ Attribute     │ Value   │
34       ├────────────────────────────────────────────┼───────────────┼─────────┤
35       │memfrob()                                   │ Thread safety │ MT-Safe │
36       └────────────────────────────────────────────┴───────────────┴─────────┘
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STANDARDS

39       GNU.
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