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/*
* transmission-remote-gtk - A GTK RPC client to Transmission
* Copyright (C) 2010 Alan Fitton
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include "base64.h"
static const char cb64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
void encodeblock(unsigned char in[3], unsigned char out[4], int len)
{
out[0] = cb64[in[0] >> 2];
out[1] = cb64[((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4)];
out[2] =
(unsigned char) (len >
1 ? cb64[((in[1] & 0x0f) << 2) |
((in[2] & 0xc0) >> 6)] : '=');
out[3] = (unsigned char) (len > 2 ? cb64[in[2] & 0x3f] : '=');
}
char *base64encode(char *filename)
{
FILE *infile = fopen(filename, "rb");
unsigned char in[3], out[4];
int i, len, j = 0;
char *output = NULL;
while (!feof(infile)) {
len = 0;
for (i = 0; i < 3; i++) {
in[i] = (unsigned char) getc(infile);
if (!feof(infile)) {
len++;
} else {
in[i] = 0;
}
}
if (len) {
output = (char *) realloc(output, j + 5);
encodeblock(in, out, len);
for (i = 0; i < 4; i++) {
output[j++] = out[i];
}
}
}
output[j] = '\0';
fclose(infile);
return output;
}
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