Cheap and disgusting md5 utf16le with c++ and nodejs

disgusting_md5_utf16le.cpp

#include <iostream>

std::string exec(std::string cmd) {
    std::string data;
    FILE * stream;
    const int max_buffer = 256;
    char buffer[max_buffer];
    cmd.append(" 2>&1");

    stream = popen(cmd.c_str(), "r");
    if (stream) {
        while (!feof(stream))
            if (fgets(buffer, max_buffer, stream) != nullptr) data.append(buffer);
        pclose(stream);
    }
    return data;
}

std::string md5sum(const std::string &input)
{
    // TODO: make this less cheap
    std::string result = exec("echo \"console.log(require('crypto').createHash('md5')"
                              ".update(Buffer('"+input+"', 'UTF-16LE')).digest('hex'));\" | node -");
    result = result.substr(0, 32);    
    return result;
}

int main()
{
  std::cout << md5sum("abcdef-ghijklm");
  return 0;
}