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Diffstat (limited to 'icedax/base64.c')
| -rw-r--r-- | icedax/base64.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/icedax/base64.c b/icedax/base64.c new file mode 100644 index 0000000..69b75cb --- /dev/null +++ b/icedax/base64.c @@ -0,0 +1,121 @@ +/* + * 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 */ +} |