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amt-certificates-0.0.1.js
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amt-certificates-0.0.1.js
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/**
* @fileoverview Intel(r) AMT Certificate functions
* @author Ylian Saint-Hilaire
* @version v0.2.0b
*/
/*
// Check which key pair matches the public key in the certificate
function amtcert_linkCertPrivateKey(certs, keys) {
for (var i in certs) {
var cert = certs[i];
try {
if (keys.length == 0) return;
var publicKeyPEM = forge.pki.publicKeyToPem(forge.pki.certificateFromAsn1(forge.asn1.fromDer(cert.X509Certificate)).publicKey).substring(28 + 32).replace(/(\r\n|\n|\r)/gm, "");
for (var j = 0; j < keys.length; j++) {
if (publicKeyPEM === (keys[j]['DERKey'] + '-----END PUBLIC KEY-----')) {
keys[j].XCert = cert; // Link the key pair to the certificate
cert.XPrivateKey = keys[j]; // Link the certificate to the key pair
}
}
} catch (e) { console.log(e); }
}
}
*/
// Check which key pair matches the public key in the certificate
function amtcert_linkCertPrivateKey(certs, keys) {
if ((keys == null) || (keys.length == 0)) return;
for (var i in certs) {
var cert = certs[i];
try {
var publicKeyPEM = forge.pki.publicKeyToPem(forge.pki.certificateFromAsn1(forge.asn1.fromDer(cert.X509Certificate)).publicKey).substring(28 + 32).replace(/(\r\n|\n|\r)/gm, "");
publicKeyPEM = publicKeyPEM.substring(0, publicKeyPEM.length - 24); // Remove the PEM footer
for (var j = 0; j < keys.length; j++) {
if ((publicKeyPEM === (keys[j]['DERKey'])) || (publicKeyPEM == btoa(atob(keys[j]['DERKey']).substring(24)))) { // Match directly or, new version of Intel AMT put the key type OID in the private key, skip that and match.
keys[j].XCert = cert; // Link the key pair to the certificate
cert.XPrivateKey = keys[j]; // Link the certificate to the key pair
}
}
} catch (e) { console.log(e); }
}
}
// Load a P12 file, decodes it using the password and returns the private key handle
function amtcert_loadP12File(file, password, func) {
try {
// Encode in Base64 so Forge API can parse it.
var p12Der = window.forge.util.decode64(btoa(file));
var p12Asn1 = window.forge.asn1.fromDer(p12Der);
var p12 = window.forge.pkcs12.pkcs12FromAsn1(p12Asn1, password);
// Private key is stored in a shrouded key bag
var bags = p12.getBags({ bagType: window.forge.pki.oids.pkcs8ShroudedKeyBag });
console.assert(bags[window.forge.pki.oids.pkcs8ShroudedKeyBag] && bags[window.forge.pki.oids.pkcs8ShroudedKeyBag].length > 0);
// Import the Forge private key structure into Web Crypto
var privateKey = bags[window.forge.pki.oids.pkcs8ShroudedKeyBag][0].key;
var rsaPrivateKey = window.forge.pki.privateKeyToAsn1(privateKey);
var privateKeyInfo = window.forge.pki.wrapRsaPrivateKey(rsaPrivateKey);
var pkcs8 = window.forge.asn1.toDer(privateKeyInfo).getBytes();
// Get the issuer attributes
var certBags = p12.getBags({ bagType: window.forge.pki.oids.certBag });
var issuerAttributes = certBags[window.forge.pki.oids.certBag][0].cert.subject.attributes;
var bags1 = p12.getBags({ bagType: forge.pki.oids.certBag });
var cert = bags1[forge.pki.oids.certBag][0].cert;
func(privateKey, issuerAttributes, cert);
return true;
} catch (ex) { }
return false;
}
function amtcert_signWithCaKey(DERKey, caPrivateKey, certAttributes, issuerAttributes, extKeyUsage) {
if (!caPrivateKey || caPrivateKey == null) {
var certAndKey = amtcert_createCertificate(issuerAttributes);
caPrivateKey = certAndKey.key;
}
return amtcert_createCertificate(certAttributes, caPrivateKey, DERKey, issuerAttributes, extKeyUsage);
}
// --- Extended Key Usage OID's ---
// 1.3.6.1.5.5.7.3.1 = TLS Server certificate
// 1.3.6.1.5.5.7.3.2 = TLS Client certificate
// 2.16.840.1.113741.1.2.1 = Intel AMT Remote Console
// 2.16.840.1.113741.1.2.2 = Intel AMT Local Console
// 2.16.840.1.113741.1.2.3 = Intel AMT Client Setup Certificate (Zero-Touch)
// Generate a certificate with a set of attributes signed by a rootCert. If the rootCert is obmitted, the generated certificate is self-signed.
function amtcert_createCertificate(certAttributes, caPrivateKey, DERKey, issuerAttributes, extKeyUsage) {
// Generate a keypair and create an X.509v3 certificate
var keys, cert = forge.pki.createCertificate();
if (!DERKey) {
keys = forge.pki.rsa.generateKeyPair(2048);
cert.publicKey = keys.publicKey;
} else {
cert.publicKey = forge.pki.publicKeyFromPem('-----BEGIN PUBLIC KEY-----' + DERKey + '-----END PUBLIC KEY-----');
}
cert.serialNumber = '' + Math.floor((Math.random() * 100000) + 1);
cert.validity.notBefore = new Date(2018, 0, 1);
//cert.validity.notBefore.setFullYear(cert.validity.notBefore.getFullYear() - 1); // Create a certificate that is valid one year before, to make sure out-of-sync clocks don't reject this cert.
cert.validity.notAfter = new Date(2049, 11, 31);
//cert.validity.notAfter.setFullYear(cert.validity.notAfter.getFullYear() + 20);
var attrs = [];
if (certAttributes['CN']) attrs.push({ name: 'commonName', value: certAttributes['CN'] });
if (certAttributes['C']) attrs.push({ name: 'countryName', value: certAttributes['C'] });
if (certAttributes['ST']) attrs.push({ shortName: 'ST', value: certAttributes['ST'] });
if (certAttributes['O']) attrs.push({ name: 'organizationName', value: certAttributes['O'] });
cert.setSubject(attrs);
if (caPrivateKey) {
// Use root attributes
var rootattrs = [];
if (issuerAttributes['CN']) rootattrs.push({ name: 'commonName', value: issuerAttributes['CN'] });
if (issuerAttributes['C']) rootattrs.push({ name: 'countryName', value: issuerAttributes['C'] });
if (issuerAttributes['ST']) rootattrs.push({ shortName: 'ST', value: issuerAttributes['ST'] });
if (issuerAttributes['O']) rootattrs.push({ name: 'organizationName', value: issuerAttributes['O'] });
cert.setIssuer(rootattrs);
} else {
// Use our own attributes
cert.setIssuer(attrs);
}
if (caPrivateKey == null) {
// Create a root certificate
cert.setExtensions([{
name: 'basicConstraints',
cA: true
}, {
name: 'nsCertType',
sslCA: true,
emailCA: true,
objCA: true
}, {
name: 'subjectKeyIdentifier'
}]);
} else {
if (extKeyUsage == null) { extKeyUsage = { name: 'extKeyUsage', serverAuth: true, } } else { extKeyUsage.name = 'extKeyUsage'; }
/*
{
name: 'extKeyUsage',
serverAuth: true,
clientAuth: true,
codeSigning: true,
emailProtection: true,
timeStamping: true,
'2.16.840.1.113741.1.2.1': true
}
*/
// Create a leaf certificate
cert.setExtensions([{
name: 'basicConstraints'
}, {
name: 'keyUsage',
keyCertSign: true,
digitalSignature: true,
nonRepudiation: true,
keyEncipherment: true,
dataEncipherment: true
}, extKeyUsage, {
name: 'nsCertType',
client: true,
server: true,
email: true,
objsign: true,
}, {
name: 'subjectKeyIdentifier'
}]);
}
// Self-sign certificate
if (caPrivateKey) {
cert.sign(caPrivateKey, forge.md.sha256.create());
} else {
cert.sign(keys.privateKey, forge.md.sha256.create());
}
if (DERKey) {
return cert;
} else {
return { 'cert': cert, 'key': keys.privateKey };
}
}
function _stringToArrayBuffer(str) {
var buf = new ArrayBuffer(str.length);
var bufView = new Uint8Array(buf);
for (var i = 0, strLen = str.length; i < strLen; i++) { bufView[i] = str.charCodeAt(i); }
return buf;
}
function _arrayBufferToString(buffer) {
var binary = '';
var bytes = new Uint8Array(buffer);
var len = bytes.byteLength;
for (var i = 0; i < len; i++) { binary += String.fromCharCode(bytes[i]); }
return binary;
}
function certCetAsn1Values(node, list) {
if ((typeof node === 'string') && (node.indexOf('https://') == 0)) { list.push(node); return; }
if (Array.isArray(node)) { for (var i in node) { certCetAsn1Values(node[i], list); } return; }
if (node && typeof node === 'object') { certCetAsn1Values(node.value, list) }
}
function getExtensionUrls(cert, val) {
var list = [], ext = cert.getExtension(val);
if (ext != null) { certCetAsn1Values(forge.asn1.fromDer(ext.value), list); }
return list;
}
var certUrlCache = null;
var certUrlCacheFile = null;
function getCertUrl(url, func) {
if (certUrlCacheFile == null) { if (process.env.LOCALAPPDATA != null) { certUrlCacheFile = require('path').join(process.env.LOCALAPPDATA, 'mccache.json'); } else { certUrlCacheFile = 'mccache.json'; } }
if (certUrlCache == null) { try { certUrlCache = JSON.parse(require('fs').readFileSync(certUrlCacheFile)); } catch (ex) { certUrlCache = {}; } }
if ((certUrlCache[url] != null) && (certUrlCache[url].data != null)) { var timeout = 0; if (url.endsWith('.crl')) { timeout = Date.now() - (14 * 86400000); } if (certUrlCache[url].time > timeout) { func(url, atob(certUrlCache[url].data)); return; } }
console.log('Loading: ' + url);
var u = require('url').parse(url);
var req = require('https').get({ hostname: u.hostname, port: u.port?u.port:443, path: u.path, method: 'GET', rejectUnauthorized: false
}, function (resp) {
var data = '';
resp.on('data', function (chunk) { if (data != null) { data += chunk.toString('binary'); } if (data.length > 500000) { data = null; } });
resp.on('end', function () { certUrlCache[url] = { data: btoa(data), time: Date.now() }; try { require('fs').writeFileSync(certUrlCacheFile, JSON.stringify(certUrlCache, null, 2)); } catch (ex) { } func(url, data); });
});
req.on('error', function (err) { console.log('Error: ' + err.message); func(url, null); });
}