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/**
* nodejs(http://github.com/ry/node/) library for base64 encoding(decoding)
*
* @package base64
* @link http://github.com/brainfucker/node-base64
* @autor Oleg Illarionov <oleg@emby.ru>
* @version 1.0
*/
#include <v8.h>
#include <node.h>
#include <node_buffer.h>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace v8;
using namespace node;
static const char base64_table[] = {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/', '\0'
};
static const char base64_pad = '=';
static const short base64_reverse_table[256] = {
-2, -2, -2, -2, -2, -2, -2, -2, -2, -1, -1, -2, -2, -1, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-1, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, 62, -2, -2, -2, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -2, -2, -2, -2, -2, -2,
-2, 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, -2, -2, -2, -2, -2,
-2, 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, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2
};
char* base64_encode(const unsigned char *str, int length, int *ret_length) /* {{{ */
{
const unsigned char *current = str;
char *p;
char *result;
if ((length + 2) < 0 || ((length + 2) / 3) >= (1 << (sizeof(int) * 8 - 2))) {
if (ret_length != NULL) {
*ret_length = 0;
}
return NULL;
}
result = (char *)malloc((((length + 2) / 3) * 4)*(sizeof(char))+(1));
if (result == NULL) {
fprintf(stderr, "out of memory!\n");
exit(1);
}
p = result;
while (length > 2) {
*p++ = base64_table[current[0] >> 2];
*p++ = base64_table[((current[0] & 0x03) << 4) + (current[1] >> 4)];
*p++ = base64_table[((current[1] & 0x0f) << 2) + (current[2] >> 6)];
*p++ = base64_table[current[2] & 0x3f];
current += 3;
length -= 3;
}
if (length != 0) {
*p++ = base64_table[current[0] >> 2];
if (length > 1) {
*p++ = base64_table[((current[0] & 0x03) << 4) + (current[1] >> 4)];
*p++ = base64_table[(current[1] & 0x0f) << 2];
*p++ = base64_pad;
} else {
*p++ = base64_table[(current[0] & 0x03) << 4];
*p++ = base64_pad;
*p++ = base64_pad;
}
}
if (ret_length != NULL) {
*ret_length = (int)(p - result);
}
*p = '\0';
return result;
}
char *base64_decode(const unsigned char *str, int length, int *ret_length)
{
const unsigned char *current = str;
int ch, i = 0, j = 0, k;
char *result;
result = (char *)malloc(length+1);
if (result == NULL) {
fprintf(stderr, "out of memory!\n");
exit(1);
}
while ((ch = *current++) != '\0' && length-- > 0) {
if (ch == base64_pad) {
if (*current != '=' && (i % 4) == 1) {
free(result);
return NULL;
}
continue;
}
ch = base64_reverse_table[ch];
if ((1 && ch < 0) || ch == -1) {
continue;
} else if (ch == -2) {
free(result);
return NULL;
}
switch(i % 4) {
case 0:
result[j] = ch << 2;
break;
case 1:
result[j++] |= ch >> 4;
result[j] = (ch & 0x0f) << 4;
break;
case 2:
result[j++] |= ch >>2;
result[j] = (ch & 0x03) << 6;
break;
case 3:
result[j++] |= ch;
break;
}
i++;
}
k = j;
if (ch == base64_pad) {
switch(i % 4) {
case 1:
free(result);
return NULL;
case 2:
k++;
case 3:
result[k] = 0;
}
}
if(ret_length) {
*ret_length = j;
}
result[j] = '\0';
return result;
}
Handle<Value>
base64_encode_binding(const Arguments& args)
{
HandleScope scope;
int len;
Local<String> ret;
if (Buffer::HasInstance(args[0])) {
//Buffer *buffer = ObjectWrap::Unwrap<Buffer>(args[0]->ToObject());
Handle<Object> buffer = args[0]->ToObject();
char *str = base64_encode((unsigned char*)Buffer::Data(buffer), Buffer::Length(buffer),&len);
ret = String::New(str, len);
delete str;
} else {
String::Utf8Value data(args[0]->ToString());
char* str = base64_encode((unsigned char*)*data,data.length(),&len);
ret = String::New(str,len);
delete str;
}
return scope.Close(ret);
}
Handle<Value>
base64_decode_binding(const Arguments& args)
{
HandleScope scope;
Local<String> ret;
int len;
if (Buffer::HasInstance(args[0])) {
//Buffer *buffer = ObjectWrap::Unwrap<Buffer>(args[0]->ToObject());
Handle<Object> buffer = args[0]->ToObject();
char *str = base64_decode((unsigned char*)Buffer::Data(buffer), Buffer::Length(buffer),&len);
ret = String::New(str, len);
delete str;
} else {
String::Utf8Value data(args[0]->ToString());
char* str=base64_decode((unsigned char*)*data,data.length(),&len);
ret = String::New(str,len);
delete str;
}
return scope.Close(ret);
}
extern "C" void init (Handle<Object> target)
{
HandleScope scope;
target->Set(String::New("encode"), FunctionTemplate::New(base64_encode_binding)->GetFunction());
target->Set(String::New("decode"), FunctionTemplate::New(base64_decode_binding)->GetFunction());
}