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Authenticode.js fixes to header parsing.

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This commit is contained in:
Ylian Saint-Hilaire 2022-05-30 13:45:41 -07:00
parent 66b1ca95d9
commit e422f92674
1 changed files with 32 additions and 14 deletions
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38
authenticode.js
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@ -304,11 +304,22 @@ function createAuthenticodeHandler(path) {
return r;
}
// Trim a string at teh first null character
function stringUntilNull(str) {
if (str == null) return null;
const i = str.indexOf('\0');
if (i >= 0) return str.substring(0, i);
return str;
}
// Decode the version information from the resource
obj.getVersionInfo = function () {
var r = {}, info = readVersionInfo(getVersionInfoData(), 0);
if (info == null) return null;
const strings = info.stringFile.stringTable.strings;
if ((info == null) || (info.stringFiles == null)) return null;
var StringFileInfo = null;
for (var i in info.stringFiles) { if (info.stringFiles[i].szKey == 'StringFileInfo') { StringFileInfo = info.stringFiles[i]; } }
if ((StringFileInfo == null) || (StringFileInfo.stringTable == null) || (StringFileInfo.stringTable.strings == null)) return null;
const strings = StringFileInfo.stringTable.strings;
for (var i in strings) { r[strings[i].key] = strings[i].value; }
return r;
}
@ -339,7 +350,7 @@ function createAuthenticodeHandler(path) {
if (r.szKey != 'VS_VERSION_INFO') return null;
//console.log('getVersionInfo', r.wLength, r.wValueLength, r.wType, r.szKey.toString());
if (r.wValueLength == 52) { r.fixedFileInfo = readFixedFileInfoStruct(buf, ptr + 40); }
r.stringFile = readStringFileStruct(buf, ptr + 40 + r.wValueLength);
r.stringFiles = readStringFilesStruct(buf, ptr + 40 + r.wValueLength, r.wLength - 40 - r.wValueLength);
return r;
}
@ -365,16 +376,23 @@ function createAuthenticodeHandler(path) {
}
// StringFileInfo structure: https://docs.microsoft.com/en-us/windows/win32/menurc/stringfileinfo
function readStringFileStruct(buf, ptr) {
function readStringFilesStruct(buf, ptr, len) {
var t = [], startPtr = ptr;
while (ptr < (startPtr + len)) {
const r = {};
r.wLength = buf.readUInt16LE(ptr);
if (r.wLength == 0) return t;
r.wValueLength = buf.readUInt16LE(ptr + 2);
r.wType = buf.readUInt16LE(ptr + 4);
r.szKey = unicodeToString(buf.slice(ptr + 6, ptr + 34));
if (r.szKey != 'StringFileInfo') return null;
r.wType = buf.readUInt16LE(ptr + 4); // 1 = Text, 2 = Binary
r.szKey = stringUntilNull(unicodeToString(buf.slice(ptr + 6, ptr + 6 + (r.wLength - 6)))); // String value
//console.log('readStringFileStruct', r.wLength, r.wValueLength, r.wType, r.szKey.toString());
r.stringTable = readStringTableStruct(buf, ptr + 36 + r.wValueLength);
return r;
if (r.szKey == 'StringFileInfo') { r.stringTable = readStringTableStruct(buf, ptr + 36 + r.wValueLength); }
if (r.szKey == 'VarFileInfo$') { r.varFileInfo = {}; } // TODO
t.push(r);
ptr += r.wLength;
ptr = padPointer(ptr);
}
return t;
}
// StringTable structure: https://docs.microsoft.com/en-us/windows/win32/menurc/stringtable
@ -610,7 +628,7 @@ function start() {
console.log(JSON.stringify(r, null, 2));
} else {
var versionInfo = exe.getVersionInfo();
if (versionInfo != null) { console.log("Version Information:"); for (var i in versionInfo) { console.log(' ' + i + ': \"' + versionInfo[i] + '\"'); } }
if (versionInfo != null) { console.log("Version Information:"); for (var i in versionInfo) { if (versionInfo[i] == null) { console.log(' ' + i + ': (Empty)'); } else { console.log(' ' + i + ': \"' + versionInfo[i] + '\"'); } } }
console.log("Signature Information:");
if (exe.fileHashAlgo != null) {
console.log(" Hash Method:", exe.fileHashAlgo);