//If the source data contains '\ 0', the result will be truncated
QString Base64Converter::revert(const QString& text)
{
QByteArray byte_array = text.toLocal8Bit();
if (byte_array.size()%4 != 0)
{
return QObject::tr("Invalid base64 string length");
}
const unsigned char* from_str = (const unsigned char*)byte_array.constData();
int to_str_len = byte_array.size() / 4 * 3;
unsigned char* to_str = new unsigned char[to_str_len + 1];
to_str[to_str_len] = '\0';
int totallen = 0;
for(int i = 0; i<byte_array.size()/4; i++)
{
int len = decodeblock( &from_str[i*4], &to_str[i*3]);
totallen += len;
if (len == 0)
{
LOG_ERROR(QObject::tr("Invalid base64 code"));
delete[] to_str;
return "";
}
}
QString result = QString::fromLocal8Bit((char*)to_str);
delete[] to_str;
return result;
}
std::string b64decode(InputIterator begin, InputIterator end)
{
unsigned char in[4], out[3];
unsigned char tmp;
int i, len;
std::string databuf;
while( begin != end ) {
len = 0;
for( i = 0; i < 4; i++ ) {
if( begin != end ) {
tmp = static_cast<unsigned char>( *begin++ );
if (tmp != '=') {
in[i] = tmp;
len++;
} else {
in[i] = 0;
}
} else {
in[i] = 0;
}
}
if( len ) {
decodeblock( in, out, len );
for( i = 0; i < 3; i++ ) {
databuf.push_back(out[i]);
}
}
}
return databuf;
}
