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First working authenticode.js.

This commit is contained in:
Ylian Saint-Hilaire 2022-05-27 12:35:41 -07:00
parent 549b67555f
commit 33f6a71e63
1 changed files with 18 additions and 33 deletions
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51
authenticode.js
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@ -94,32 +94,25 @@ function createAuthenticodeHandler(path) {
var derlen = forge.asn1.getBerValueLength(forge.util.createBuffer(pkcs7raw.slice(1, 5))) + 4;
if (derlen != pkcs7raw.length) { pkcs7raw = pkcs7raw.slice(0, derlen); }
//console.log('pkcs7raw', pkcs7raw.toString('base64'));
// Decode the signature block
var pkcs7der = forge.asn1.fromDer(forge.util.createBuffer(pkcs7raw));
// To work around ForgeJS PKCS#7 limitation
// Switch content type from 1.3.6.1.4.1.311.2.1.4 to forge.pki.oids.data (1.2.840.113549.1.7.1)
// TODO: Find forge.asn1.oidToDer('1.3.6.1.4.1.311.2.1.4').data and switch it.
// To work around ForgeJS PKCS#7 limitation, this may break PKCS7 verify if ForjeJS adds support for it in the future
// Switch content type from "1.3.6.1.4.1.311.2.1.4" to "1.2.840.113549.1.7.1"
pkcs7der.value[1].value[0].value[2].value[0].value = forge.asn1.oidToDer(forge.pki.oids.data).data;
// Convert the ASN1 content data into binary and place back
var pkcs7content = forge.asn1.toDer(pkcs7der.value[1].value[0].value[2].value[1].value[0]).data;
pkcs7der.value[1].value[0].value[2].value[1].value[0] = { tagClass: 0, type: 4, constructed: false, composed: false, value: pkcs7content };
// DEBUG: Print out the new DER
//console.log(Buffer.from(forge.asn1.toDer(pkcs7der).data, 'binary').toString('base64'));
// Decode the PKCS7 message
var pkcs7 = p7.messageFromAsn1(pkcs7der);
var pkcs7content = forge.asn1.fromDer(pkcs7.rawCapture.content.value[0].value);
obj.rawSignedContent = pkcs7.rawCapture.content.value[0].value;
var pkcs7content = pkcs7.rawCapture.content.value[0];
//console.log('p7content', JSON.stringify(pkcs7content));
// DEBUG: Print out the content
//console.log(Buffer.from(pkcs7.rawCapture.content.value[0].value, 'binary').toString('hex'));
/*
// Verify a PKCS#7 signature
// Verify is not currently supported in node-forge, but if implemented in the future, this code could work.
var caStore = forge.pki.createCaStore();
for (var i in obj.certificates) { caStore.addCertificate(obj.certificates[i]); }
// Return is true if all signatures are valid and chain up to a provided CA
if (!pkcs7.verify(caStore)) { throw ('Executable file has an invalid signature.'); }
*/
// Set the certificate chain
obj.certificates = pkcs7.certificates;
@ -185,8 +178,13 @@ function createAuthenticodeHandler(path) {
obj.sign = function (cert, key) {
if ((cert == null) || (key == null)) { var c = obj.createSelfSignedCert(); cert = c.cert; key = c.key; }
var fileHash = getHash('sha384');
// Create the signature block
var p7 = forge.pkcs7.createSignedData();
p7.content = forge.asn1.toDer({ "tagClass": 0, "type": 16, "constructed": true, "composed": true, "value": [{ "tagClass": 0, "type": 16, "constructed": true, "composed": true, "value": [{ "tagClass": 0, "type": 6, "constructed": false, "composed": false, "value": forge.asn1.oidToDer("1.3.6.1.4.1.311.2.1.15").data }, { "tagClass": 0, "type": 16, "constructed": true, "composed": true, "value": [{ "tagClass": 0, "type": 3, "constructed": false, "composed": false, "value": "\u0000", "bitStringContents": "\u0000", "original": { "tagClass": 0, "type": 3, "constructed": false, "composed": false, "value": "\u0000" } }, { "tagClass": 128, "type": 0, "constructed": true, "composed": true, "value": [{ "tagClass": 128, "type": 2, "constructed": true, "composed": true, "value": [{ "tagClass": 128, "type": 0, "constructed": false, "composed": false, "value": "" }] }] }] }] }, { "tagClass": 0, "type": 16, "constructed": true, "composed": true, "value": [{ "tagClass": 0, "type": 16, "constructed": true, "composed": true, "value": [{ "tagClass": 0, "type": 6, "constructed": false, "composed": false, "value": forge.asn1.oidToDer(forge.pki.oids.sha384).data }, { "tagClass": 0, "type": 5, "constructed": false, "composed": false, "value": "" }] }, { "tagClass": 0, "type": 4, "constructed": false, "composed": false, "value": fileHash.toString('binary') }] }] });
var content = { "tagClass": 0, "type": 16, "constructed": true, "composed": true, "value": [{ "tagClass": 0, "type": 16, "constructed": true, "composed": true, "value": [{ "tagClass": 0, "type": 6, "constructed": false, "composed": false, "value": forge.asn1.oidToDer("1.3.6.1.4.1.311.2.1.15").data }, { "tagClass": 0, "type": 16, "constructed": true, "composed": true, "value": [{ "tagClass": 0, "type": 3, "constructed": false, "composed": false, "value": "\u0000", "bitStringContents": "\u0000", "original": { "tagClass": 0, "type": 3, "constructed": false, "composed": false, "value": "\u0000" } }, { "tagClass": 128, "type": 0, "constructed": true, "composed": true, "value": [{ "tagClass": 128, "type": 2, "constructed": true, "composed": true, "value": [{ "tagClass": 128, "type": 0, "constructed": false, "composed": false, "value": "" }] }] }] }] }, { "tagClass": 0, "type": 16, "constructed": true, "composed": true, "value": [{ "tagClass": 0, "type": 16, "constructed": true, "composed": true, "value": [{ "tagClass": 0, "type": 6, "constructed": false, "composed": false, "value": forge.asn1.oidToDer(forge.pki.oids.sha384).data }, { "tagClass": 0, "type": 5, "constructed": false, "composed": false, "value": "" }] }, { "tagClass": 0, "type": 4, "constructed": false, "composed": false, "value": fileHash.toString('binary') }] }] };
p7.contentInfo = forge.asn1.create(forge.asn1.Class.UNIVERSAL, forge.asn1.Type.SEQUENCE, true, [forge.asn1.create(forge.asn1.Class.UNIVERSAL, forge.asn1.Type.OID, false, forge.asn1.oidToDer('1.3.6.1.4.1.311.2.1.4').getBytes())]);
p7.contentInfo.value.push(forge.asn1.create(forge.asn1.Class.CONTEXT_SPECIFIC, 0, true, [content]));
p7.content = {}; // We set .contentInfo and have .content empty to bypass node-forge limitation on the type of content it can sign.
p7.addCertificate(cert);
p7.addSigner({
key: key,
@ -203,19 +201,6 @@ function createAuthenticodeHandler(path) {
p7.sign();
var p7signature = Buffer.from(forge.pkcs7.messageToPem(p7).split('-----BEGIN PKCS7-----')[1].split('-----END PKCS7-----')[0], 'base64');
// Correct the signed data type
// Decode the signature block
var pkcs7der = forge.asn1.fromDer(forge.util.createBuffer(p7signature.toString('binary')));
// To work around ForgeJS PKCS#7 limitation
// Switch content type from 1.2.840.113549.1.7.1 to forge.pki.oids.data (1.3.6.1.4.1.311.2.1.4)
pkcs7der.value[1].value[0].value[2].value[0].value = forge.asn1.oidToDer('1.3.6.1.4.1.311.2.1.4').data;
// Convert the ASN1 content data into binary and place back
var pkcs7content = forge.asn1.fromDer(forge.util.createBuffer(Buffer.from(pkcs7der.value[1].value[0].value[2].value[1].value[0].value, 'binary').toString('binary')));
pkcs7der.value[1].value[0].value[2].value[1].value = [ pkcs7content ];
p7signature = Buffer.from(forge.asn1.toDer(pkcs7der).data, 'binary');
// Create the output filename
var outputFileName = this.path.split('.');
outputFileName[outputFileName.length - 2] += '-jsigned';