mirror of https://github.com/BOINC/boinc.git
211 lines
6.2 KiB
C
211 lines
6.2 KiB
C
// Berkeley Open Infrastructure for Network Computing
|
|
// http://boinc.berkeley.edu
|
|
// Copyright (C) 2005 University of California
|
|
//
|
|
// This 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.
|
|
//
|
|
// This software 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.
|
|
//
|
|
// To view the GNU Lesser General Public License visit
|
|
// http://www.gnu.org/copyleft/lesser.html
|
|
// or write to the Free Software Foundation, Inc.,
|
|
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
|
|
#ifdef _WIN32
|
|
#include "boinc_win.h"
|
|
#endif
|
|
|
|
#ifndef _WIN32
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "base64.h"
|
|
|
|
#ifdef _USING_FCGI_
|
|
#include "fcgi_stdio.h"
|
|
#endif
|
|
|
|
using std::string;
|
|
|
|
// Table of characters coding the 64 values.
|
|
static char base64_value_to_char[64] =
|
|
{
|
|
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', // 0- 9
|
|
'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', // 10-19
|
|
'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', // 20-29
|
|
'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', // 30-39
|
|
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', // 40-49
|
|
'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', // 50-59
|
|
'8', '9', '+', '/' // 60-63
|
|
};
|
|
|
|
// Table of base64 values for first 128 characters.
|
|
static short base64_char_to_value[128] =
|
|
{
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 0- 9
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 10- 19
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 20- 29
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 30- 39
|
|
-1, -1, -1, 62, -1, -1, -1, 63, 52, 53, // 40- 49
|
|
54, 55, 56, 57, 58, 59, 60, 61, -1, -1, // 50- 59
|
|
-1, -1, -1, -1, -1, 0, 1, 2, 3, 4, // 60- 69
|
|
5, 6, 7, 8, 9, 10, 11, 12, 13, 14, // 70- 79
|
|
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, // 80- 89
|
|
25, -1, -1, -1, -1, -1, -1, 26, 27, 28, // 90- 99
|
|
29, 30, 31, 32, 33, 34, 35, 36, 37, 38, // 100-109
|
|
39, 40, 41, 42, 43, 44, 45, 46, 47, 48, // 110-119
|
|
49, 50, 51, -1, -1, -1, -1, -1 // 120-127
|
|
};
|
|
|
|
/* The following diagram shows the logical steps by which three octets
|
|
get transformed into four base64 characters.
|
|
|
|
.--------. .--------. .--------.
|
|
|aaaaaabb| |bbbbcccc| |ccdddddd|
|
|
`--------' `--------' `--------'
|
|
6 2 4 4 2 6
|
|
.--------+--------+--------+--------.
|
|
|00aaaaaa|00bbbbbb|00cccccc|00dddddd|
|
|
`--------+--------+--------+--------'
|
|
|
|
.--------+--------+--------+--------.
|
|
|AAAAAAAA|BBBBBBBB|CCCCCCCC|DDDDDDDD|
|
|
`--------+--------+--------+--------'
|
|
|
|
The octets are divided into 6 bit chunks, which are then encoded into
|
|
base64 characters. */
|
|
|
|
string r_base64_encode (const char* from, size_t length)
|
|
{
|
|
string result;
|
|
result.reserve(length + length/3 + 1);
|
|
size_t i = 0;
|
|
int c;
|
|
unsigned int value;
|
|
|
|
while (i < length)
|
|
{
|
|
c = from[i++];
|
|
|
|
// Process first byte of a triplet.
|
|
result += base64_value_to_char[0x3f & c >> 2];
|
|
value = (0x03 & c) << 4;
|
|
|
|
// Process second byte of a triplet.
|
|
if (i == length)
|
|
{
|
|
result += base64_value_to_char[value];
|
|
result += '=';
|
|
result += '=';
|
|
break;
|
|
}
|
|
|
|
c = from[i++];
|
|
|
|
result += base64_value_to_char[value | (0x0f & c >> 4)];
|
|
value = (0x0f & c) << 2;
|
|
|
|
// Process third byte of a triplet.
|
|
if (i == length)
|
|
{
|
|
result += base64_value_to_char[value];
|
|
result += '=';
|
|
break;
|
|
}
|
|
|
|
c = from[i++];
|
|
|
|
result += base64_value_to_char[value | (0x03 & c >> 6)];
|
|
result += base64_value_to_char[0x3f & c];
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#define IS_ASCII(Character) \
|
|
((Character) < 128)
|
|
#define IS_BASE64(Character) \
|
|
(IS_ASCII (Character) && base64_char_to_value[Character] >= 0)
|
|
#define IS_BASE64_IGNORABLE(Character) \
|
|
((Character) == ' ' || (Character) == '\t' || (Character) == '\n' \
|
|
|| (Character) == '\f' || (Character) == '\r')
|
|
|
|
#define READ_QUADRUPLET_BYTE() \
|
|
do { \
|
|
if (i == length) return result; \
|
|
c = from[i++]; \
|
|
} \
|
|
while (IS_BASE64_IGNORABLE (c))
|
|
|
|
string r_base64_decode (const char* from, size_t length)
|
|
{
|
|
size_t i = 0;
|
|
string result;
|
|
unsigned char c;
|
|
unsigned long value;
|
|
|
|
while (true)
|
|
{
|
|
// Process first byte of a quadruplet.
|
|
|
|
READ_QUADRUPLET_BYTE();
|
|
|
|
if (!IS_BASE64 (c))
|
|
throw InvalidBase64Exception();
|
|
value = base64_char_to_value[c] << 18;
|
|
|
|
// Process second byte of a quadruplet.
|
|
|
|
READ_QUADRUPLET_BYTE();
|
|
|
|
if (!IS_BASE64 (c))
|
|
throw InvalidBase64Exception();
|
|
value |= base64_char_to_value[c] << 12;
|
|
|
|
c = (unsigned char) (value >> 16);
|
|
result += c;
|
|
|
|
// Process third byte of a quadruplet.
|
|
|
|
READ_QUADRUPLET_BYTE();
|
|
if (c == '=')
|
|
{
|
|
READ_QUADRUPLET_BYTE();
|
|
|
|
if (c != '=')
|
|
throw InvalidBase64Exception();
|
|
continue;
|
|
}
|
|
|
|
if (!IS_BASE64 (c))
|
|
throw InvalidBase64Exception();
|
|
value |= base64_char_to_value[c] << 6;
|
|
|
|
c = (unsigned char) (0xff & value >> 8);
|
|
result += c;
|
|
|
|
// Process fourth byte of a quadruplet.
|
|
|
|
READ_QUADRUPLET_BYTE();
|
|
|
|
if (c == '=')
|
|
continue;
|
|
|
|
if (!IS_BASE64 (c))
|
|
throw InvalidBase64Exception();
|
|
value |= base64_char_to_value[c];
|
|
|
|
c = (unsigned char) (0xff & value);
|
|
result += c;
|
|
}
|
|
}
|
|
|
|
const char *BOINC_RCSID_2b47467419 = "$Id$";
|