+++ /dev/null
-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
-
-/*
- * (GLABELS) Label and Business Card Creation program for GNOME
- *
- * base64.c: GLabels base64 encode/decode module
- *
- * Copyright (C) 2003 Jim Evins <evins@snaught.com>
- *
- * This module is based on base64.c from fetchmail:
- *
- * Copyright (C)2002 by Eric S. Raymond.
- * Portions are copyrighted by Carl E. Harris and George M. Sipe.
- *
- * 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
- */
-
-/*
- * This base 64 encoding is defined in RFC2045 section 6.8.
- */
-#include <config.h>
-
-#include "base64.h"
-
-#include <glib/gmem.h>
-#include <ctype.h>
-#include <string.h>
-
-/*========================================================*/
-/* Private macros and constants. */
-/*========================================================*/
-
-#define LINE_LENGTH 76 /* Must be <= 76 and must be a multiple of 4 */
-#define BAD -1
-
-#define DECODE64(c) (isascii(c) ? base64val[c] : BAD)
-
-/*========================================================*/
-/* Private types. */
-/*========================================================*/
-
-/*========================================================*/
-/* Private globals. */
-/*========================================================*/
-
-static const gchar base64digits[] =
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-static const gchar base64val[] = {
- BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD,
- BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD,
- BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD, 62, BAD,BAD,BAD, 63,
- 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,BAD,BAD, BAD,BAD,BAD,BAD,
- BAD, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
- 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,BAD, BAD,BAD,BAD,BAD,
- BAD, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
- 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,BAD, BAD,BAD,BAD,BAD
-};
-
-/*========================================================*/
-/* Private function prototypes. */
-/*========================================================*/
-
-\f
-/*****************************************************************************/
-/* Encode to Base64 string. */
-/*****************************************************************************/
-gchar *
-gl_base64_encode (const guchar *in, guint inlen)
-{
- gchar *out, *p_out;
- gint buf_size;
- gint i;
-
- /* Calculate output buffer size */
- buf_size = 4*((inlen+2)/3); /* Encoded characters */
- buf_size += buf_size / LINE_LENGTH + 2; /* Line breaks */
- buf_size += 1; /* null termination */
-
- /* Allocate output buffer */
- out = g_new0 (gchar, buf_size);
- p_out=out;
-
- /* Now do the encoding */
- *p_out++ = '\n';
- for ( i=0; inlen >= 3; inlen-=3 ) {
-
- *p_out++ = base64digits[in[0] >> 2];
- *p_out++ = base64digits[((in[0] << 4) & 0x30) | (in[1] >> 4)];
- *p_out++ = base64digits[((in[1] << 2) & 0x3c) | (in[2] >> 6)];
- *p_out++ = base64digits[in[2] & 0x3f];
- in += 3;
-
- i += 4;
- if ( (i % LINE_LENGTH) == 0 ) {
- *p_out++ = '\n';
- }
-
- }
- if (inlen > 0) {
- guchar fragment;
-
- *p_out++ = base64digits[in[0] >> 2];
- fragment = (in[0] << 4) & 0x30;
- if (inlen > 1)
- fragment |= in[1] >> 4;
- *p_out++ = base64digits[fragment];
- *p_out++ = (inlen < 2) ? '=' : base64digits[(in[1] << 2) & 0x3c];
- *p_out++ = '=';
-
- *p_out++ = '\n';
- }
- *p_out++ = '\0';
-
- return out;
-}
-
-/*****************************************************************************/
-/* Decode from a Base64 string. */
-/*****************************************************************************/
-guchar *
-gl_base64_decode (const gchar *in, guint *outlen)
-{
- gchar *out, *p_out;
- gint buf_size;
- register guchar digit1, digit2, digit3, digit4;
-
- /* Calculate output buffer size */
- buf_size = strlen (in) * 3 / 4;
-
- /* Allocate output buffer */
- out = g_new0 (gchar, buf_size);
-
- *outlen = 0;
- p_out = out;
-
- /* Skip non-printable characters */
- while ( (*in == '\n') || (*in == '\r') || (*in == ' ') ) {
- in ++;
- }
- if (!*in) {
- g_free (out);
- return NULL;
- }
-
- /* Now do the decoding */
- do {
- digit1 = in[0];
- if (DECODE64(digit1) == BAD) {
- g_free (out);
- return NULL;
- }
- digit2 = in[1];
- if (DECODE64(digit2) == BAD) {
- g_free (out);
- return NULL;
- }
- digit3 = in[2];
- if (digit3 != '=' && DECODE64(digit3) == BAD) {
- g_free (out);
- return NULL;
- }
- digit4 = in[3];
- if (digit4 != '=' && DECODE64(digit4) == BAD) {
- g_free (out);
- return NULL;
- }
- in += 4;
-
- *p_out++ = (DECODE64(digit1)<<2) | (DECODE64(digit2) >> 4);
- (*outlen)++;
- if (digit3 != '=')
- {
- *p_out++ = ((DECODE64(digit2)<<4)&0xf0) | (DECODE64(digit3)>>2);
- (*outlen)++;
- if (digit4 != '=')
- {
- *p_out++ = ((DECODE64(digit3)<<6)&0xc0) | DECODE64(digit4);
- (*outlen)++;
- }
- }
-
- /* Skip non-printable characters */
- while ( (*in == '\n') || (*in == '\r') || (*in == ' ') ) {
- in ++;
- }
-
- } while (*in && digit4 != '=');
-
- return (guchar *)out;
-}
-
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