function logGetCertificate() {

  alert("logGetCertificate()");
  // Clear log

  document.getElementById('log').innerHTML = '';
  // Timestamp
  log_text("sign() clicked on " + new Date().toUTCString());

  // Select hash
  var hashtype = "SHA-256";

  // Set backend if asked
  var backend = "autodetect";

  // get language
  var lang = "en";
  if (!window.hwcrypto.use(backend)) {
    log_text("Selecting backend failed.");
  }

  var hash = $("#hashvalue").val();
  log_text("Signing " + hashtype + ": " + hash);

  // debug
  window.hwcrypto.debug().then(function(response) {
    log_text("Debug: " + response);
  },
  function(err) {
    log_text("debug() failed: " + err);
    return;
  });
  // Sign
  window.hwcrypto.getCertificate({lang: lang}).then(function(response) {
    var cert = response;
    log_text("Using certificate:\n" + hexToPem(response.hex));
  });
}

function getCertificate() {

  alert("getCertificate()");
  // Clear log
  document.getElementById('log').innerHTML = '';
  // Timestamp
  log_text("sign() clicked on " + new Date().toUTCString());

  // Set backend if asked
  var backend = "autodetect";

  // get language
  var lang = "en";
  if (!window.hwcrypto.use(backend)) {
    slog_text("Selecting backend failed.");
  }
  window.hwcrypto.getCertificate({lang: lang}).then(function(response) {
    var cert = response;
    log_text("Using certificate:\n" + hexToPem(response.hex));
    return cert;
  });
}