pkijs
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Public Key Infrastructure (PKI) is the basis of how identity and key management is performed on the web today. PKIjs is a pure JavaScript library implementing the formats that are used in PKI applications. It is built on WebCrypto and aspires to make it p
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<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title>How to create new X.509 certificate</title>
<script type="text/javascript" src="org/pkijs/common.js"></script>
<script type="text/javascript" src="org/pkijs/asn1.js"></script>
<script type="text/javascript" src="org/pkijs/x509_schema.js"></script>
<script type="text/javascript" src="org/pkijs/x509_simpl.js"></script>
<style type="text/css">
*
{
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
overflow:auto;
}
html,body
{
width:100%;
max-width:100%;
margin:0;
padding:0;
border-style:none;
}
body *
{
font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;
}
textarea
{
width:100%;
height:300px;
resize:none;
}
div#cert_div
{
position:relative;
display:block;
left:50%;
width:700px;
margin-left:-350px;
margin-top:20px;
margin-bottom:10px;
}
</style>
<script type="text/javascript">
//*********************************************************************************
function formatPEM(pem_string)
{
/// <summary>Format string in order to have each line with length equal to 63</summary>
/// <param name="pem_string">String to format</param>
var string_length = pem_string.length;
var result_string = "";
for(var i = 0, count = 0; i < string_length; i++, count++)
{
if(count > 63)
{
result_string = result_string + "\r\n";
count = 0;
}
result_string = result_string + pem_string[i];
}
return result_string;
}
//*********************************************************************************
function create_new_certificate()
{
// #region Initial variables
var sequence = Promise.resolve();
var cert_simpl = new org.pkijs.simpl.CERT();
var publicKey;
var privateKey;
// #endregion
// #region Get a "crypto" extension
var crypto = org.pkijs.getCrypto();
if(typeof crypto == "undefined")
{
alert("No WebCrypto extension found");
return;
}
// #endregion
// #region Put a static values
cert_simpl.serialNumber = new org.pkijs.asn1.INTEGER({ value: 1 });
cert_simpl.issuer.types_and_values.push(new org.pkijs.simpl.ATTR_TYPE_AND_VALUE({
type: "2.5.4.6", // Country name
value: new org.pkijs.asn1.PRINTABLESTRING({ value: "RU" })
}));
cert_simpl.issuer.types_and_values.push(new org.pkijs.simpl.ATTR_TYPE_AND_VALUE({
type: "2.5.4.3", // Common name
value: new org.pkijs.asn1.PRINTABLESTRING({ value: "Test" })
}));
cert_simpl.subject.types_and_values.push(new org.pkijs.simpl.ATTR_TYPE_AND_VALUE({
type: "2.5.4.6", // Country name
value: new org.pkijs.asn1.PRINTABLESTRING({ value: "RU" })
}));
cert_simpl.subject.types_and_values.push(new org.pkijs.simpl.ATTR_TYPE_AND_VALUE({
type: "2.5.4.3", // Common name
value: new org.pkijs.asn1.PRINTABLESTRING({ value: "Test" })
}));
cert_simpl.notBefore.value = new Date(2013, 01, 01);
cert_simpl.notAfter.value = new Date(2016, 01, 01);
cert_simpl.extensions = new Array(); // Extensions are not a part of certificate by default, it's an optional array
// #region "BasicConstraints" extension
var basic_constr = new org.pkijs.simpl.x509.BasicConstraints({
cA: true,
pathLenConstraint: 3
});
cert_simpl.extensions.push(new org.pkijs.simpl.EXTENSION({
extnID: "2.5.29.19",
critical: false,
extnValue: basic_constr.toSchema().toBER(false),
parsedValue: basic_constr // Parsed value for well-known extensions
}));
// #endregion
// #region "KeyUsage" extension
var bit_array = new ArrayBuffer(1);
var bit_view = new Uint8Array(bit_array);
bit_view[0] = bit_view[0] | 0x02; // Key usage "cRLSign" flag
bit_view[0] = bit_view[0] | 0x04; // Key usage "keyCertSign" flag
var key_usage = new org.pkijs.asn1.BITSTRING({ value_hex: bit_array });
cert_simpl.extensions.push(new org.pkijs.simpl.EXTENSION({
extnID: "2.5.29.15",
critical: false,
extnValue: key_usage.toBER(false),
parsedValue: key_usage // Parsed value for well-known extensions
}));
// #endregion
cert_simpl.signatureAlgorithm.algorithm_id = "1.2.840.113549.1.1.5"; // RSA + SHA-1
cert_simpl.signature.algorithm_id = cert_simpl.signatureAlgorithm.algorithm_id; // Must be the same value
// #endregion
// #region Create a new key pair
sequence = sequence.then(
function()
{
return crypto.generateKey({ name: "RSASSA-PKCS1-v1_5", modulusLength: 2048, publicExponent: new Uint8Array([0x01, 0x00, 0x01]), hash: { name: "sha-1" } }, true, ["encrypt", "decrypt", "sign", "verify"]);
}
);
// #endregion
// #region Store new key in an interim variables
sequence = sequence.then(
function(keyPair)
{
publicKey = keyPair.publicKey;
privateKey = keyPair.privateKey;
},
function(error)
{
alert("Error during key generation: " + error);
}
);
// #endregion
// #region Exporting public key into "subjectPublicKeyInfo" value of certificate
sequence = sequence.then(
function()
{
return cert_simpl.subjectPublicKeyInfo.importKey(publicKey);
}
);
// #endregion
// #region Signing final certificate
sequence = sequence.then(
function()
{
return cert_simpl.sign(privateKey);
},
function(error)
{
alert("Error during exporting public key: " + error);
}
);
// #endregion
// #region Encode and store certificate
sequence = sequence.then(
function()
{
var cert_simpl_encoded = cert_simpl.toSchema(true).toBER(false);
var cert_simpl_string = String.fromCharCode.apply(null, new Uint8Array(cert_simpl_encoded));
var result_string = "-----BEGIN CERTIFICATE-----\r\n";
result_string = result_string + formatPEM(window.btoa(cert_simpl_string));
result_string = result_string + "\r\n-----END CERTIFICATE-----\r\n";
document.getElementById("new_certificate").innerHTML = result_string;
alert("Certificate created successfully!");
},
function(error)
{
alert("Error during signing: " + error);
}
);
// #endregion
// #region Exporting private key
sequence = sequence.then(
function()
{
return crypto.exportKey("pkcs8", privateKey);
}
);
// #endregion
sequence.then(
function(result)
{
var private_key_string = String.fromCharCode.apply(null, new Uint8Array(result));
var result_string = document.getElementById("new_certificate").innerHTML;
result_string = result_string + "\r\n-----BEGIN PRIVATE KEY-----\r\n";
result_string = result_string + formatPEM(window.btoa(private_key_string));
result_string = result_string + "\r\n-----END PRIVATE KEY-----";
document.getElementById("new_certificate").innerHTML = result_string;
alert("Private key exported successfully!");
},
function(error)
{
alert("Error during exporting of private key: " + error);
}
);
}
//*********************************************************************************
</script>
</head>
<body onload="create_new_certificate()">
<div id="cert_div">
<label for="new_certificate" style="font-weight:bold">BASE-64 encoded new certificate + PKCS#8 private key:</label>
<textarea id="new_certificate">New encoded certificate will be put here</textarea>
</div>
</body>
</html>