<!-- tomado de https://open-eid.github.io/hwcrypto.js/sign.html -->


    	function log_text(s) {
      		var d = document.createElement("div");
      		d.innerHTML = s;
      		document.getElementById('log').appendChild(d);
    	}

    	function debug() {
    		window.hwcrypto.debug().then(function(response) {log_text("Debug: " + response);});
    	}
    	
    	function sign() {
    		
    		alert("sign()");
    		// Clear log
	    	document.getElementById('log').innerHTML = '';
    		// Timestamp
    		log_text("sign() clicked on " + new Date().toUTCString());
    		
    		// Select hash
    		//var hashtype = $("input[name=hash]:checked").val();
    		var hashtype = "SHA-256";
    		
    		// Set backend if asked
    		//var backend =  $("input[name=backend]:checked").val()
    		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));
      			
      			
      			window.hwcrypto.sign(cert, {type: hashtype, hex: hash}, {lang: lang}).then(function(response) {
	        		log_text("Generated signature:\n" + response.hex.match(/.{1,64}/g).join("\n"));
    	  			}, function(err) {
	    	    		log_text("sign() failed: " + err);
    	  			});
	    		}, function(err) {
    	  			log_text("getCertificate() failed: " + err);
    			}
	    		
	    		);
  		}

	
	function logGetCertificate() {
		
		alert("logGetCertificate()");
		// Clear log
    	document.getElementById('log').innerHTML = '';
		// Timestamp
		log_text("sign() clicked on " + new Date().toUTCString());
		
		// Select hash
		//var hashtype = $("input[name=hash]:checked").val();
		var hashtype = "SHA-256";
		
		// Set backend if asked
		//var backend =  $("input[name=backend]:checked").val()
		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 =  $("input[name=backend]:checked").val()
		var backend = "autodetect";
		
		// get language
		var lang = "en";
		if (!window.hwcrypto.use(backend)) {
      		log_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;
    	});
    }