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Daniel Scalzi 2023-02-25 17:13:08 -05:00
parent 8d26db70dc
commit 4273be5a4c
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1 changed files with 0 additions and 86 deletions
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app/assets/js/assetguard.js
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@ -1,5 +1,4 @@
// Requirements
const AdmZip = require('adm-zip')
const async = require('async')
const child_process = require('child_process')
const crypto = require('crypto')
@ -920,26 +919,6 @@ class AssetGuard extends EventEmitter {
return crypto.createHash(algo).update(buf).digest('hex')
}
/**
* Used to parse a checksums file. This is specifically designed for
* the checksums.sha1 files found inside the forge scala dependencies.
*
* @param {string} content The string content of the checksums file.
* @returns {Object} An object with keys being the file names, and values being the hashes.
*/
static _parseChecksumsFile(content){
let finalContent = {}
let lines = content.split('\n')
for(let i=0; i<lines.length; i++){
let bits = lines[i].split(' ')
if(bits[1] == null) {
continue
}
finalContent[bits[1]] = bits[0]
}
return finalContent
}
/**
* Validate that a file exists and matches a given hash value.
*
@ -961,71 +940,6 @@ class AssetGuard extends EventEmitter {
return false
}
/**
* Validates a file in the style used by forge's version index.
*
* @param {string} filePath The path of the file to validate.
* @param {Array.<string>} checksums The checksums listed in the forge version index.
* @returns {boolean} True if the file exists and the hashes match, otherwise false.
*/
static _validateForgeChecksum(filePath, checksums){
if(fs.existsSync(filePath)){
if(checksums == null || checksums.length === 0){
return true
}
let buf = fs.readFileSync(filePath)
let calcdhash = AssetGuard._calculateHash(buf, 'sha1')
let valid = checksums.includes(calcdhash)
if(!valid && filePath.endsWith('.jar')){
valid = AssetGuard._validateForgeJar(filePath, checksums)
}
return valid
}
return false
}
/**
* Validates a forge jar file dependency who declares a checksums.sha1 file.
* This can be an expensive task as it usually requires that we calculate thousands
* of hashes.
*
* @param {Buffer} buf The buffer of the jar file.
* @param {Array.<string>} checksums The checksums listed in the forge version index.
* @returns {boolean} True if all hashes declared in the checksums.sha1 file match the actual hashes.
*/
static _validateForgeJar(buf, checksums){
// Double pass method was the quickest I found. I tried a version where we store data
// to only require a single pass, plus some quick cleanup but that seemed to take slightly more time.
const hashes = {}
let expected = {}
const zip = new AdmZip(buf)
const zipEntries = zip.getEntries()
//First pass
for(let i=0; i<zipEntries.length; i++){
let entry = zipEntries[i]
if(entry.entryName === 'checksums.sha1'){
expected = AssetGuard._parseChecksumsFile(zip.readAsText(entry))
}
hashes[entry.entryName] = AssetGuard._calculateHash(entry.getData(), 'sha1')
}
if(!checksums.includes(hashes['checksums.sha1'])){
return false
}
//Check against expected
const expectedEntries = Object.keys(expected)
for(let i=0; i<expectedEntries.length; i++){
if(expected[expectedEntries[i]] !== hashes[expectedEntries[i]]){
return false
}
}
return true
}
// #endregion
// Miscellaneous Static Functions