forked from osmocom/wireshark
![Michael Mann](/assets/img/avatar_default.png)
There could be some reuse out of it, so but it with the rest of the general utilities. Change-Id: I404c135b933660a82678510b9ca2701985c5632a Reviewed-on: https://code.wireshark.org/review/18589 Reviewed-by: Michael Mann <mmann78@netscape.net> Petri-Dish: Michael Mann <mmann78@netscape.net> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Anders Broman <a.broman58@gmail.com>
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/* base32.c
|
|
* Base-32 conversion
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <glib.h>
|
|
|
|
#include <string.h>
|
|
#include "base32.h"
|
|
|
|
/*
|
|
* Cjdns style base32 encoding
|
|
*/
|
|
|
|
/** Returned by ws_base32_encode() if the input is not valid base32. */
|
|
#define Base32_BAD_INPUT -1
|
|
/** Returned by ws_base32_encode() if the output buffer is too small. */
|
|
#define Base32_TOO_BIG -2
|
|
|
|
int ws_base32_decode(guint8* output, const guint32 outputLength,
|
|
const guint8* in, const guint32 inputLength)
|
|
{
|
|
guint32 outIndex = 0;
|
|
guint32 inIndex = 0;
|
|
guint32 work = 0;
|
|
guint32 bits = 0;
|
|
static const guint8* kChars = (guint8*) "0123456789bcdfghjklmnpqrstuvwxyz";
|
|
while (inIndex < inputLength) {
|
|
work |= ((unsigned) in[inIndex++]) << bits;
|
|
bits += 8;
|
|
while (bits >= 5) {
|
|
if (outIndex >= outputLength) {
|
|
return Base32_TOO_BIG;
|
|
}
|
|
output[outIndex++] = kChars[work & 31];
|
|
bits -= 5;
|
|
work >>= 5;
|
|
}
|
|
}
|
|
if (bits) {
|
|
if (outIndex >= outputLength) {
|
|
return Base32_TOO_BIG;
|
|
}
|
|
output[outIndex++] = kChars[work & 31];
|
|
}
|
|
if (outIndex < outputLength) {
|
|
output[outIndex] = '\0';
|
|
}
|
|
return outIndex;
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|