Initial work on Java detection/validation system.
This commit is contained in:
Daniel Scalzi
parent
5e8342aec9
commit
d3c5997baa
@ -18,7 +18,7 @@
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<body>
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<% include frame.ejs %>
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<div id="main">
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<% include welcome.ejs %>
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<% include login.ejs %>
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</div>
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</body>
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</html>
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197
app/assets/js/javaguard.js
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197
app/assets/js/javaguard.js
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@ -0,0 +1,197 @@
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const cp = require('child_process')
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const fs = require('fs')
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const path = require('path')
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const Registry = require('winreg')
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/**
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* WIP -> get a valid x64 Java path on windows.
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*/
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async function _win32Validate(){
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// Get possible paths from the registry.
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const pathSet = await _scanRegistry()
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console.log(Array.from(pathSet)) // DEBUGGING
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// Validate JAVA_HOME
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const jHome = _scanJavaHome()
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if(jHome != null && jHome.indexOf('(x86)') === -1){
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pathSet.add(jHome)
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}
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// Convert path set to an array for processing.
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const pathArr = Array.from(pathSet)
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console.log(pathArr) // DEBUGGING
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// TODO - Determine best candidate (based on version, etc).
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let res = await _validateBinary(pathArr[0]) // DEBUGGING
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console.log(res) // DEBUGGING
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}
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/**
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* Validates that a Java binary is at least 64 bit. This makes use of the non-standard
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* command line option -XshowSettings:properties. The output of this contains a property,
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* sun.arch.data.model = ARCH, in which ARCH is either 32 or 64. This option is supported
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* in Java 8 and 9. Since this is a non-standard option. This will resolve to true if
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* the function's code throws errors. That would indicate that the option is changed or
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* removed.
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*
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* @param {string} binaryPath Path to the root of the java binary we wish to validate.
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*
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* @returns {Promise.<boolean>} Resolves to false only if the test is successful and the result
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* is less than 64.
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*/
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function _validateBinary(binaryPath){
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return new Promise((resolve, reject) => {
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const fBp = path.join(binaryPath, 'bin', 'java.exe')
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cp.exec('"' + fBp + '" -XshowSettings:properties', (err, stdout, stderr) => {
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try {
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// Output is stored in stderr?
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const res = stderr
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const props = res.split('\n')
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for(let i=0; i<props.length; i++){
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if(props[i].indexOf('sun.arch.data.model') > -1){
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let arch = props[i].split('=')[1].trim()
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console.log(props[i].trim() + ' for ' + binaryPath)
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resolve(parseInt(arch) >= 64)
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}
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}
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// sun.arch.data.model not found?
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// Disregard this test.
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resolve(true)
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} catch (err){
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// Output format might have changed, validation cannot be completed.
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// Disregard this test in that case.
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resolve(true)
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}
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})
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})
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}
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/**
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* Checks for the presence of the environment variable JAVA_HOME. If it exits, we will check
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* to see if the value points to a path which exists. If the path exits, the path is returned.
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*
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* @returns {string} The path defined by JAVA_HOME, if it exists. Otherwise null.
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*/
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function _scanJavaHome(){
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const jHome = process.env.JAVA_HOME
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try {
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let res = fs.existsSync(jHome)
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return res ? jHome : null
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} catch (err) {
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// Malformed JAVA_HOME property.
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return null
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}
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}
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/**
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* Scans the registry for 64-bit Java entries. The paths of each entry are added to
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* a set and returned. Currently, only Java 8 (1.8) is supported.
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*
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* @returns {Promise.<Set.<string>>} A promise which resolves to a set of 64-bit Java root
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* paths found in the registry.
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*/
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function _scanRegistry(){
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return new Promise((resolve, reject) => {
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// Keys for Java v9.0.0 and later:
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// 'SOFTWARE\\JavaSoft\\JRE'
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// 'SOFTWARE\\JavaSoft\\JDK'
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// Forge does not yet support Java 9, therefore we do not.
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let cbTracker = 0
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let cbAcc = 0
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// Keys for Java 1.8 and prior:
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const regKeys = [
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'\\SOFTWARE\\JavaSoft\\Java Runtime Environment',
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'\\SOFTWARE\\JavaSoft\\Java Development Kit'
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]
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const candidates = new Set()
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for(let i=0; i<regKeys.length; i++){
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const key = new Registry({
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hive: Registry.HKLM,
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key: regKeys[i],
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arch: 'x64'
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})
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key.keys((err, javaVers) => {
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if(err){
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console.error(err)
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if(i === regKeys.length-1){
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resolve(candidates)
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}
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} else {
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cbTracker += javaVers.length
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if(i === regKeys.length-1 && cbTracker === cbAcc){
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resolve(candidates)
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}
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for(let j=0; j<javaVers.length; j++){
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const javaVer = javaVers[j]
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const vKey = javaVer.key.substring(javaVer.key.lastIndexOf('\\')+1)
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// Only Java 8 is supported currently.
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if(parseFloat(vKey) == 1.8){
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javaVer.get('JavaHome', (err, res) => {
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const jHome = res.value
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if(jHome.indexOf('(x86)') == -1){
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candidates.add(jHome)
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cbAcc++
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}
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if(cbAcc === cbTracker){
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resolve(candidates)
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}
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})
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}
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}
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}
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})
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}
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})
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}
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/**
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* WIP -> get a valid x64 Java path on macOS.
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*/
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function _darwinValidate(){
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}
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/**
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* WIP -> get a valid x64 Java path on linux.
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*/
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function _linuxValidate(){
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}
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// This will eventually return something.
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async function validate(){
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const opSys = process.platform
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if(opSys === 'win32'){
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await _win32Validate()
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} else if(opSys === 'darwin'){
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_darwinValidate()
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} else if(opSys === 'linux'){
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_linuxValidate()
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}
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}
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validate()
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module.exports = {
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validate
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}
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15
package-lock.json
generated
15
package-lock.json
generated
@ -1253,14 +1253,6 @@
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"pend": "1.2.0"
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}
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},
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"find-java-home": {
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"version": "https://registry.npmjs.org/find-java-home/-/find-java-home-0.2.0.tgz",
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"integrity": "sha1-XFALutMBiDKruYhvfQ8D9XFGzdw=",
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"requires": {
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"which": "https://registry.npmjs.org/which/-/which-1.0.9.tgz",
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"winreg": "https://registry.npmjs.org/winreg/-/winreg-1.2.4.tgz"
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}
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},
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"find-up": {
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"version": "1.1.2",
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"resolved": "https://registry.npmjs.org/find-up/-/find-up-1.1.2.tgz",
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@ -2856,10 +2848,6 @@
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"extsprintf": "1.3.0"
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}
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},
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"which": {
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"version": "https://registry.npmjs.org/which/-/which-1.0.9.tgz",
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"integrity": "sha1-RgwdoPgQED0DIam2M6+eV15kSG8="
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},
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"which-module": {
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"version": "2.0.0",
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"resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
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@ -2909,7 +2897,8 @@
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}
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},
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"winreg": {
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"version": "https://registry.npmjs.org/winreg/-/winreg-1.2.4.tgz",
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"version": "1.2.4",
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"resolved": "https://registry.npmjs.org/winreg/-/winreg-1.2.4.tgz",
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"integrity": "sha1-ugZWKbepJRMOFXeRCM9UCZDpjRs="
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},
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"wrap-ansi": {
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@ -31,10 +31,10 @@
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"discord-rpc": "^3.0.0-beta.8",
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"ejs": "^2.5.7",
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"ejs-electron": "^2.0.1",
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"find-java-home": "^0.2.0",
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"jquery": "^3.3.1",
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"request-promise-native": "^1.0.5",
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"uuid": "^3.2.1"
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"uuid": "^3.2.1",
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"winreg": "^1.2.4"
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},
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"devDependencies": {
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"electron": "^1.8.4",
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