/base64.cc
C++ | 221 lines | 182 code | 29 blank | 10 comment | 38 complexity | a42a0597ec10435cdba714b6a67814c8 MD5 | raw file
- /**
- * 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());
- }