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/*
* This file has been modified for the cdrkit suite.
*
* The behaviour and appearence of the program code below can differ to a major
* extent from the version distributed by the original author(s).
*
* For details, see Changelog file distributed with the cdrkit package. If you
* received this file from another source then ask the distributing person for
* a log of modifications.
*
*/
/* @(#)base64.c 1.4 02/04/06 Copyright 1998,1999 Heiko Eissfeldt */
/*____________________________________________________________________________
//
// CD Index - The Internet CD Index
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id: base64.c,v 1.1.1.3 1999/04/29 00:57:14 marc Exp $
//____________________________________________________________________________
*/
/*
* Program: RFC-822 routines (originally from SMTP)
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 27 July 1988
* Last Edited: 10 September 1998
*
* Sponsorship: The original version of this work was developed in the
* Symbolic Systems Resources Group of the Knowledge Systems
* Laboratory at Stanford University in 1987-88, and was funded
* by the Biomedical Research Technology Program of the National
* Institutes of Health under grant number RR-00785.
*
* Original version Copyright 1988 by The Leland Stanford Junior University
* Copyright 1998 by the University of Washington
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notices appear in all copies and that both the
* above copyright notices and this permission notice appear in supporting
* documentation, and that the name of the University of Washington or The
* Leland Stanford Junior University not be used in advertising or publicity
* pertaining to distribution of the software without specific, written prior
* permission. This software is made available "as is", and
* THE UNIVERSITY OF WASHINGTON AND THE LELAND STANFORD JUNIOR UNIVERSITY
* DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO THIS SOFTWARE,
* INCLUDING WITHOUT LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE, AND IN NO EVENT SHALL THE UNIVERSITY OF
* WASHINGTON OR THE LELAND STANFORD JUNIOR UNIVERSITY BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, TORT (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "config.h"
#include <stdio.h>
#include <stdxlib.h>
#include "base64.h"
/* NOTE: This is not true RFC822 anymore. The use of the characters
// '/', '+', and '=' is no bueno when the ID will be used as part of a URL.
// '_', '.', and '-' have been used instead
*/
/* Convert binary contents to BASE64
* Accepts: source
* length of source
* pointer to return destination length
* Returns: destination as BASE64
*/
unsigned char *rfc822_binary(char *src, unsigned long srcl, unsigned long *len)
{
unsigned char *ret,*d;
unsigned char *s = (unsigned char *) src;
char *v = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._";
unsigned long i = ((srcl + 2) / 3) * 4;
*len = i += 2 * ((i / 60) + 1);
d = ret = malloc ((size_t) ++i);
for (i = 0; srcl; s += 3) { /* process tuplets */
*d++ = v[s[0] >> 2]; /* byte 1: high 6 bits (1) */
/* byte 2: low 2 bits (1), high 4 bits (2) */
*d++ = v[((s[0] << 4) + (--srcl ? (s[1] >> 4) : 0)) & 0x3f];
/* byte 3: low 4 bits (2), high 2 bits (3) */
*d++ = srcl ? v[((s[1] << 2) + (--srcl ? (s[2] >> 6) : 0)) & 0x3f] : '-';
/* byte 4: low 6 bits (3) */
*d++ = srcl ? v[s[2] & 0x3f] : '-';
if (srcl) srcl--; /* count third character if processed */
if ((++i) == 15) { /* output 60 characters? */
i = 0; /* restart line break count, insert CRLF */
*d++ = '\015'; *d++ = '\012';
}
}
*d = '\0'; /* tie off string */
return ret; /* return the resulting string */
}
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