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Authenticode.js can now fully decode and reencode a resource section.

This commit is contained in:
Ylian Saint-Hilaire 2022-06-09 11:37:39 -07:00
parent 97a9b2ee00
commit d06ca601ff
1 changed files with 12 additions and 35 deletions
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47
authenticode.js
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@ -627,7 +627,7 @@ function createAuthenticodeHandler(path) {
// Decode the version information from the resource
obj.getVersionInfo = function () {
console.log('READ', getVersionInfoData().toString('hex'));
//console.log('READ', getVersionInfoData().toString('hex'));
var r = {}, info = readVersionInfo(getVersionInfoData(), 0);
if ((info == null) || (info.stringFiles == null)) return null;
var StringFileInfo = null;
@ -661,6 +661,7 @@ function createAuthenticodeHandler(path) {
//console.log('--WRITE BUF ARRAY START--');
//for (var i in verInfoResBufArray) { console.log(verInfoResBufArray[i].toString('hex')); }
//console.log('--WRITE BUF ARRAY END--');
//console.log('OUT', Buffer.concat(verInfoResBufArray).toString('hex'));
// Set the new buffer as part of the resources
for (var i = 0; i < obj.resources.entries.length; i++) {
@ -724,8 +725,6 @@ function createAuthenticodeHandler(path) {
if (info.stringFiles != null) { wLength += writeStringFileInfo(bufArray, info.stringFiles); }
console.log('@@@@@@Z', wLength, Buffer.concat(bufArray).length);
buf.writeUInt16LE(Buffer.concat(bufArray).length, 0); // wLength
buf.writeUInt16LE(wValueLength, 2); // wValueLength
return wLength;
@ -733,10 +732,10 @@ function createAuthenticodeHandler(path) {
// StringFileInfo structure: https://docs.microsoft.com/en-us/windows/win32/menurc/stringfileinfo
function writeStringFileInfo(bufArray, stringFiles) {
//console.log('writeStringFileInfo', stringFiles);
var totalLen = 0;
for (var i in stringFiles) {
var l = 6 + (stringFiles[i].szKey.length * 2);
if (stringFiles[i].szKey == 'VarFileInfo') { l += 4; } // TODO: This is a hack, not sure what the correct code should be
const buf2 = Buffer.alloc(padPointer(l));
buf2.writeUInt16LE(1, 4); // wType
stringToUnicode(stringFiles[i].szKey, buf2, 6);
@ -756,8 +755,7 @@ function createAuthenticodeHandler(path) {
// VarFileInfo structure: https://docs.microsoft.com/en-us/windows/win32/menurc/var-str
function writeVarFileInfoStruct(bufArray, varFileInfo) {
console.log('*************writeVarFileInfoStruct', varFileInfo);
var l = 6 + (varFileInfo.szKey.length * 2);
var l = 8 + (varFileInfo.szKey.length * 2);
const buf = Buffer.alloc(padPointer(l));
buf.writeUInt16LE(0, 4); // wType
stringToUnicode(varFileInfo.szKey, buf, 6);
@ -769,11 +767,10 @@ function createAuthenticodeHandler(path) {
if (varFileInfo.value) {
bufArray.push(varFileInfo.value);
wLength += varFileInfo.value.length;
wValueLength += varFileInfo.value.length;
}
buf.writeUInt16LE(l + wLength, 0); // wLength
buf.writeUInt16LE(buf.length + wLength, 0); // wLength
buf.writeUInt16LE(wValueLength, 2); // wValueLength
//console.log('WwriteVarFileInfoStruct', buf.toString('hex'));
return buf.length + wLength;
}
@ -792,8 +789,6 @@ function createAuthenticodeHandler(path) {
if (stringTable.strings) { wLength += writeStringStructs(bufArray, stringTable.strings); }
buf.writeUInt16LE(l + wLength, 0); // wLength
buf.writeUInt16LE(wValueLength, 2); // wValueLength
//console.log('WStringTableStruct', buf.toString('hex'));
return buf.length + wLength;
}
@ -1166,9 +1161,8 @@ function createAuthenticodeHandler(path) {
obj.writeExecutable = function (args) {
// Get version information from the resource
var versions = obj.getVersionInfo();
//versions['FileDescription'] = 'Mesh Agent Service';
versions['FileDescription'] = 'This is a test';
obj.setVersionInfo(versions);
//var versions2 = obj.getVersionInfo();
// Open the file
var output = fs.openSync(args.out, 'w');
@ -1185,11 +1179,13 @@ function createAuthenticodeHandler(path) {
var newResSize = obj.header.sections['.rsrc'].rawSize; // Testing 102400
var resDeltaSize = newResSize - oldResSize;
/*
console.log('fileAlign', fileAlign);
console.log('resPtr', resPtr);
console.log('oldResSize', oldResSize);
console.log('newResSize', newResSize);
console.log('resDeltaSize', resDeltaSize);
*/
// Change PE optional header sizeOfInitializedData standard field
fullHeader.writeUInt32LE(obj.header.peStandard.sizeOfInitializedData + resDeltaSize, obj.header.peOptionalHeaderLocation + 8);
@ -1232,13 +1228,13 @@ function createAuthenticodeHandler(path) {
}
// Write the entire header to the destination file
console.log('Write header', fullHeader.length);
//console.log('Write header', fullHeader.length);
fs.writeSync(output, fullHeader);
written += fullHeader.length;
// Write the entire executable until the start to the resource segment
var totalWrite = resPtr;
console.log('Write until res', totalWrite);
//console.log('Write until res', totalWrite);
while ((totalWrite - written) > 0) {
tmp = readFileSlice(written, Math.min(totalWrite - written, 65536));
fs.writeSync(output, tmp);
@ -1250,28 +1246,9 @@ function createAuthenticodeHandler(path) {
fs.writeSync(output, rsrcSection);
written += rsrcSection.length;
/*
// Write the old resource segment (debug)
totalWrite = resPtr + oldResSize;
console.log('Write res', totalWrite);
while ((totalWrite - written) > 0) {
tmp = readFileSlice(written, Math.min(totalWrite - written, 65536));
fs.writeSync(output, tmp);
written += tmp.length;
}
*/
/*
// Write a dummy 102400 bytes
tmp = Buffer.alloc(resDeltaSize);
console.log('Write dummy', resDeltaSize);
fs.writeSync(output, tmp);
written += tmp.length;
*/
// Write until the signature block
totalWrite = obj.header.sigpos + resDeltaSize;
console.log('Write until signature', totalWrite);
//console.log('Write until signature', totalWrite);
while ((totalWrite - written) > 0) {
tmp = readFileSlice(written - resDeltaSize, Math.min(totalWrite - written, 65536));
fs.writeSync(output, tmp);