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annotate src/base64/base64.c @ 304:d5ce2ba71e7b

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manual formating of Received: hdrs; changed hdr for local receival Now the Received: headers are much friendlier to read. About folding: We must fold any line at 998 chars before transfer. We should fold the lines we produce at 78 chars. That is what RFC 2821 requests. We should think about it, somewhen. The header for locally (i.e. non-SMTP) received mail is changed to the format postfix uses. This matches RFC 2821 better. The `from' clause should contain a domain or IP, not a user name. Also, the `with' clause should contain a registered standard protocol name, which ``local'' is not.
author markus schnalke <meillo@marmaro.de>
date Thu, 09 Dec 2010 18:28:11 -0300
parents 26e34ae9a3e3
children c74adb7c4f50
rev   line source
meillo@0 1 /* base64.c, Copyright 2000 (C) Oliver Kurth,
meillo@0 2 *
meillo@0 3 * This program is free software; you can redistribute it and/or modify
meillo@0 4 * it under the terms of the GNU General Public License as published by
meillo@0 5 * the Free Software Foundation; either version 2 of the License, or
meillo@0 6 * (at your option) any later version.
meillo@10 7 *
meillo@0 8 * This program is distributed in the hope that it will be useful,
meillo@0 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@0 11 * GNU General Public License for more details.
meillo@0 12 *
meillo@0 13 * You should have received a copy of the GNU General Public License
meillo@0 14 * along with this program; if not, write to the Free Software
meillo@0 15 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
meillo@0 16 */
meillo@0 17
meillo@0 18 /* see also RFC 1341 */
meillo@0 19
meillo@0 20 #include <glib.h>
meillo@0 21 #include <string.h>
meillo@0 22 #include "base64.h"
meillo@0 23
meillo@10 24 gchar*
meillo@10 25 base64_encode(guchar * buf, gint len)
meillo@0 26 {
meillo@10 27 guchar *outbuf, *q;
meillo@10 28 gchar enc[64];
meillo@10 29 gint i = 0, j = 0;
meillo@10 30 guint in0, in1, in2;
meillo@0 31
meillo@10 32 for (; i < 26; i++)
meillo@10 33 enc[i] = (gchar) ('A' + j++);
meillo@10 34 j = 0;
meillo@10 35 for (; i < 52; i++)
meillo@10 36 enc[i] = (gchar) ('a' + j++);
meillo@10 37 j = 0;
meillo@10 38 for (; i < 62; i++)
meillo@10 39 enc[i] = (gchar) ('0' + j++);
meillo@10 40 enc[i++] = '+';
meillo@10 41 enc[i++] = '/';
meillo@0 42
meillo@10 43 outbuf = g_malloc(((len + 3) * 8) / 6);
meillo@10 44 q = outbuf;
meillo@0 45
meillo@10 46 i = 0;
meillo@10 47 while (i < len - 2) {
meillo@10 48 in0 = buf[i++];
meillo@10 49 in1 = buf[i++];
meillo@10 50 in2 = buf[i++];
meillo@0 51
meillo@10 52 *(q++) = enc[(in0 >> 2) & 0x3f];
meillo@10 53 *(q++) = enc[((in0 << 4) | (in1 >> 4)) & 0x3f];
meillo@10 54 *(q++) = enc[((in1 << 2) | (in2 >> 6)) & 0x3f];
meillo@10 55 *(q++) = enc[in2 & 0x3f];
meillo@10 56 }
meillo@10 57 if ((len - i) == 1) {
meillo@10 58 in0 = buf[i++];
meillo@10 59 *(q++) = enc[(in0 >> 2) & 0x3f];
meillo@10 60 *(q++) = enc[(in0 << 4) & 0x3f];
meillo@10 61 *(q++) = '=';
meillo@10 62 *(q++) = '=';
meillo@10 63 } else if ((len - i) == 2) {
meillo@10 64 in0 = buf[i++];
meillo@10 65 in1 = buf[i++];
meillo@10 66 *(q++) = enc[(in0 >> 2) & 0x3f];
meillo@10 67 *(q++) = enc[((in0 << 4) | (in1 >> 4)) & 0x3f];
meillo@10 68 *(q++) = enc[(in1 << 2) & 0x3f];
meillo@10 69 *(q++) = '=';
meillo@10 70 }
meillo@10 71 *q = 0;
meillo@0 72
meillo@10 73 return outbuf;
meillo@0 74 }
meillo@0 75
meillo@10 76 gchar *base64_decode(gchar * buf, gint * size)
meillo@10 77 {
meillo@10 78 guchar *p = buf, *q;
meillo@10 79 guint in[4];
meillo@10 80 /* gchar *out = g_malloc(((strlen(buf)+3) * 3) / 4 + 1); */
meillo@10 81 gchar *out = g_malloc((strlen(buf) + 3) + 1);
meillo@10 82
meillo@10 83 q = out;
meillo@10 84 *size = 0;
meillo@10 85
meillo@10 86 *q = 0;
meillo@10 87
meillo@10 88 while (*p) {
meillo@10 89 int i = 0;
meillo@10 90 while (i < 4) {
meillo@10 91 if (!*p)
meillo@10 92 break;
meillo@10 93 if ((*p >= 'A') && (*p <= 'Z'))
meillo@10 94 in[i++] = *p - 'A';
meillo@10 95 else if ((*p >= 'a') && (*p <= 'z'))
meillo@10 96 in[i++] = (*p - 'a') + 26;
meillo@10 97 else if ((*p >= '0') && (*p <= '9'))
meillo@10 98 in[i++] = (*p - '0') + 52;
meillo@10 99 else if (*p == '+')
meillo@10 100 in[i++] = 62;
meillo@10 101 else if (*p == '/')
meillo@10 102 in[i++] = 63;
meillo@10 103 else if (*p == '=') {
meillo@10 104 in[i++] = 0;
meillo@10 105 p++;
meillo@10 106 break;
meillo@10 107 } else if ((*p != '\r') && (*p != '\n')) {
meillo@10 108 p++;
meillo@10 109 break;
meillo@10 110 }
meillo@10 111 p++;
meillo@10 112 }
meillo@10 113 if ((i == 4) || (p[-1] == '=')) {
meillo@10 114 *(q++) = ((in[0] << 2) | (in[1] >> 4));
meillo@10 115 *(q++) = ((in[1] << 4) | (in[2] >> 2));
meillo@10 116 *(q++) = ((in[2] << 6) | in[3]);
meillo@10 117 if (p[-1] == '=') {
meillo@10 118 if (i == 3) {
meillo@10 119 (*size)++;
meillo@10 120 } else if (i == 4) {
meillo@10 121 (*size) += 2;
meillo@10 122 }
meillo@10 123 } else {
meillo@10 124 *size += 3;
meillo@10 125 }
meillo@10 126 }
meillo@10 127 }
meillo@10 128 return out;
meillo@10 129 }