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Moved base64 code to base64.[ch]

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git-svn-id: https://proxytunnel.svn.sourceforge.net/svnroot/proxytunnel/trunk/proxytunnel@19 bc163920-b10d-0410-b2c5-a5491ca2ceef
This commit is contained in:
Mark Janssen 2002-04-20 15:19:27 +00:00
parent e4bb139a97
commit 785411bb8b
7 changed files with 89 additions and 54 deletions
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74
base64.c Normal file
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@ -0,0 +1,74 @@
/* Proxytunnel - (C) 2001-2002 Jos Visser / Mark Janssen */
/* Contact: josv@osp.nl / maniac@maniac.nl */
/*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include "config.h"
#include "cmdline.h"
#include "base64.h"
/* Needed for base64 encoding... */
static const char base64digits[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/*
* Small MAX macro
*/
#ifndef MAX
#define MAX( x, y ) ( ( (x)>(y) ) ? (x) : (y) )
#endif
/*
* This base64 code is heavily modified from fetchmail (also GPL'd, of
* course) by Brendan Cully <brendan@kublai.com>.
*
* Original copyright notice:
*
* The code in the fetchmail distribution is Copyright 1997 by Eric
* S. Raymond. Portions are also copyrighted by Carl Harris, 1993
* and 1995. Copyright retained for the purpose of protecting free
* redistribution of source.
*
*/
/* raw bytes to null-terminated base 64 string */
void base64(unsigned char *out, const unsigned char *in, int len)
{
while (len >= 3) {
*out++ = base64digits[in[0] >> 2];
*out++ = base64digits[((in[0] << 4) & 0x30) | (in[1] >> 4)];
*out++ = base64digits[((in[1] << 2) & 0x3c) | (in[2] >> 6)];
*out++ = base64digits[in[2] & 0x3f];
len -= 3;
in += 3;
}
/* clean up remainder */
if (len > 0) {
unsigned char fragment;
*out++ = base64digits[in[0] >> 2];
fragment = (in[0] << 4) & 0x30;
if (len > 1)
fragment |= in[1] >> 4;
*out++ = base64digits[fragment];
*out++ = (len < 2) ? '=' : base64digits[(in[1] << 2) & 0x3c];
*out++ = '=';
}
*out = '\0';
}