2007-02-28 05:40:23 +02:00
|
|
|
/*
|
|
|
|
* Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
|
|
|
|
*
|
|
|
|
* This file is part of FFmpeg.
|
|
|
|
*
|
|
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
|
|
* License as published by the Free Software Foundation; either
|
|
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
|
|
*
|
|
|
|
* FFmpeg 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
|
|
|
|
* Lesser General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
2009-02-01 04:00:19 +02:00
|
|
|
* @file libavutil/base64.c
|
2009-01-29 01:03:17 +02:00
|
|
|
* @brief Base64 encode/decode
|
2007-02-28 05:40:23 +02:00
|
|
|
* @author Ryan Martell <rdm4@martellventures.com> (with lots of Michael)
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "common.h"
|
|
|
|
#include "base64.h"
|
|
|
|
|
|
|
|
/* ---------------- private code */
|
2008-01-15 00:10:19 +02:00
|
|
|
static const uint8_t map2[] =
|
2007-02-28 05:40:23 +02:00
|
|
|
{
|
|
|
|
0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36,
|
|
|
|
0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff,
|
|
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01,
|
|
|
|
0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
|
|
|
|
0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
|
|
|
|
0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
|
|
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a, 0x1b,
|
|
|
|
0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
|
|
|
|
0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
|
|
|
|
0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33
|
|
|
|
};
|
|
|
|
|
2009-02-08 23:19:04 +02:00
|
|
|
int av_base64_decode(uint8_t *out, const char *in, int out_size)
|
2007-02-28 05:40:23 +02:00
|
|
|
{
|
|
|
|
int i, v;
|
|
|
|
uint8_t *dst = out;
|
|
|
|
|
|
|
|
v = 0;
|
|
|
|
for (i = 0; in[i] && in[i] != '='; i++) {
|
|
|
|
unsigned int index= in[i]-43;
|
2008-10-22 00:40:24 +03:00
|
|
|
if (index>=FF_ARRAY_ELEMS(map2) || map2[index] == 0xff)
|
2007-02-28 05:40:23 +02:00
|
|
|
return -1;
|
|
|
|
v = (v << 6) + map2[index];
|
|
|
|
if (i & 3) {
|
2009-02-08 23:08:42 +02:00
|
|
|
if (dst - out < out_size) {
|
2007-02-28 05:40:23 +02:00
|
|
|
*dst++ = v >> (6 - 2 * (i & 3));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-05-06 12:16:36 +03:00
|
|
|
return dst - out;
|
2007-02-28 05:40:23 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
2009-01-29 01:03:17 +02:00
|
|
|
* b64_encode: Stolen from VLC's http.c.
|
|
|
|
* Simplified by Michael.
|
|
|
|
* Fixed edge cases and made it work from data (vs. strings) by Ryan.
|
2007-02-28 05:40:23 +02:00
|
|
|
*****************************************************************************/
|
|
|
|
|
2009-02-08 23:16:36 +02:00
|
|
|
char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size)
|
2007-02-28 05:40:23 +02:00
|
|
|
{
|
|
|
|
static const char b64[] =
|
|
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
char *ret, *dst;
|
|
|
|
unsigned i_bits = 0;
|
|
|
|
int i_shift = 0;
|
2009-02-08 23:16:36 +02:00
|
|
|
int bytes_remaining = in_size;
|
2007-02-28 05:40:23 +02:00
|
|
|
|
2009-02-08 23:16:36 +02:00
|
|
|
if (in_size >= UINT_MAX / 4 ||
|
|
|
|
out_size < (in_size+2) / 3 * 4 + 1)
|
2007-02-28 05:40:23 +02:00
|
|
|
return NULL;
|
2009-02-08 23:13:11 +02:00
|
|
|
ret = dst = out;
|
2007-11-08 13:59:39 +02:00
|
|
|
while (bytes_remaining) {
|
2009-02-08 23:13:11 +02:00
|
|
|
i_bits = (i_bits << 8) + *in++;
|
2007-11-08 13:59:39 +02:00
|
|
|
bytes_remaining--;
|
|
|
|
i_shift += 8;
|
2007-02-28 05:40:23 +02:00
|
|
|
|
2007-11-08 13:59:39 +02:00
|
|
|
do {
|
|
|
|
*dst++ = b64[(i_bits << 6 >> i_shift) & 0x3f];
|
|
|
|
i_shift -= 6;
|
|
|
|
} while (i_shift > 6 || (bytes_remaining == 0 && i_shift > 0));
|
|
|
|
}
|
|
|
|
while ((dst - ret) & 3)
|
|
|
|
*dst++ = '=';
|
2007-02-28 05:40:23 +02:00
|
|
|
*dst = '\0';
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
2009-02-07 01:29:25 +02:00
|
|
|
|
|
|
|
#ifdef TEST
|
|
|
|
|
|
|
|
#undef printf
|
|
|
|
|
|
|
|
#define MAX_DATA_SIZE 1024
|
|
|
|
#define MAX_ENCODED_SIZE 2048
|
|
|
|
|
2009-03-31 12:32:59 +03:00
|
|
|
static int test_encode_decode(const uint8_t *data, unsigned int data_size,
|
|
|
|
const char *encoded_ref)
|
2009-02-07 01:29:25 +02:00
|
|
|
{
|
|
|
|
char encoded[MAX_ENCODED_SIZE];
|
|
|
|
uint8_t data2[MAX_DATA_SIZE];
|
|
|
|
int data2_size, max_data2_size = MAX_DATA_SIZE;
|
|
|
|
|
|
|
|
if (!av_base64_encode(encoded, MAX_ENCODED_SIZE, data, data_size)) {
|
|
|
|
printf("Failed: cannot encode the input data\n");
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
if (encoded_ref && strcmp(encoded, encoded_ref)) {
|
|
|
|
printf("Failed: encoded string differs from reference\n"
|
|
|
|
"Encoded:\n%s\nReference:\n%s\n", encoded, encoded_ref);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((data2_size = av_base64_decode(data2, encoded, max_data2_size)) < 0) {
|
|
|
|
printf("Failed: cannot decode the encoded string\n"
|
|
|
|
"Encoded:\n%s\n", encoded);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
if (memcmp(data2, data, data_size)) {
|
|
|
|
printf("Failed: encoded/decoded data differs from original data\n");
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
printf("Passed!\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int main(void)
|
|
|
|
{
|
|
|
|
int i, error_count = 0;
|
|
|
|
struct test {
|
|
|
|
const uint8_t *data;
|
|
|
|
const char *encoded_ref;
|
|
|
|
} tests[] = {
|
|
|
|
{ "", ""},
|
|
|
|
{ "1", "MQ=="},
|
|
|
|
{ "22", "MjI="},
|
|
|
|
{ "333", "MzMz"},
|
|
|
|
{ "4444", "NDQ0NA=="},
|
|
|
|
{ "55555", "NTU1NTU="},
|
|
|
|
{ "666666", "NjY2NjY2"},
|
|
|
|
{ "abc:def", "YWJjOmRlZg=="},
|
|
|
|
};
|
|
|
|
|
|
|
|
printf("Encoding/decoding tests\n");
|
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(tests); i++)
|
|
|
|
error_count += test_encode_decode(tests[i].data, strlen(tests[i].data), tests[i].encoded_ref);
|
|
|
|
|
|
|
|
return error_count;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|