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| -rw-r--r-- | man3/memfrob.3 | 61 |
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diff --git a/man3/memfrob.3 b/man3/memfrob.3 new file mode 100644 index 0000000..3f19845 --- /dev/null +++ b/man3/memfrob.3 @@ -0,0 +1,61 @@ +'\" t +.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" 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 (faith@cs.unc.edu) +.TH memfrob 3 2023-07-20 "Linux man-pages 6.05.01" +.SH NAME +memfrob \- frobnicate (obfuscate) a memory area +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */" +.B #include <string.h> +.PP +.BI "void *memfrob(void " s [. n "], size_t " n ); +.fi +.SH DESCRIPTION +The +.BR memfrob () +function obfuscates the first \fIn\fP bytes of the +memory area \fIs\fP by exclusive-ORing each character with the number +42. +The effect can be reversed by using +.BR memfrob () +on the +obfuscated memory area. +.PP +Note that this function is not a proper encryption routine as the XOR +constant is fixed, and is suitable only for hiding strings. +.SH RETURN VALUE +The +.BR memfrob () +function returns a pointer to the obfuscated memory +area. +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.TS +allbox; +lbx lb lb +l l l. +Interface Attribute Value +T{ +.na +.nh +.BR memfrob () +T} Thread safety MT-Safe +.TE +.sp 1 +.SH STANDARDS +GNU. +.SH SEE ALSO +.BR bstring (3), +.BR strfry (3) |