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fix: use node-rsa for decryption for higher node compatibility #1319

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fix: use node-rsa for decryption for higher node compatibility #1319

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15 changes: 6 additions & 9 deletions src/server/login.js
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ const chatPlugin = require('./chat')
const { concat } = require('../transforms/binaryStream')
const { mojangPublicKeyPem } = require('./constants')
const debug = require('debug')('minecraft-protocol')
const NodeRSA = require('node-rsa')

module.exports = function (client, server, options) {
const mojangPubKey = crypto.createPublicKey(mojangPublicKeyPem)
Expand Down Expand Up @@ -106,6 +107,9 @@ module.exports = function (client, server, options) {
}
}

const keyRsa = new NodeRSA(server.serverKey.exportKey('pkcs1'), 'private', { encryptionScheme: 'pkcs1' })
keyRsa.setOptions({ environment: 'browser' })

if (packet.hasVerifyToken === false) {
// 1.19, hasVerifyToken is set and equal to false IF chat signing is enabled
// This is the default action starting in 1.19.1.
Expand All @@ -117,10 +121,7 @@ module.exports = function (client, server, options) {
} else {
const encryptedToken = packet.hasVerifyToken ? packet.crypto.verifyToken : packet.verifyToken
try {
const decryptedToken = crypto.privateDecrypt({
key: server.serverKey.exportKey(),
padding: crypto.constants.RSA_PKCS1_PADDING
}, encryptedToken)
const decryptedToken = keyRsa.decrypt(encryptedToken)

if (!client.verifyToken.equals(decryptedToken)) {
client.end('DidNotEncryptVerifyTokenProperly')
Expand All @@ -131,13 +132,9 @@ module.exports = function (client, server, options) {
return
}
}

let sharedSecret
try {
sharedSecret = crypto.privateDecrypt({
key: server.serverKey.exportKey(),
padding: crypto.constants.RSA_PKCS1_PADDING
}, packet.sharedSecret)
sharedSecret = keyRsa.decrypt(packet.sharedSecret)
} catch (e) {
client.end('DidNotEncryptVerifyTokenProperly')
return
Expand Down
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