Fix outbound user data request/response

src/messages/userDataRequest.ts

@@ -33,9 +33,11 @@ export function packUserDataRequestMessage (properties: UserDataRequestMessage,
   const packedData = new SmartBuffer()
   packedData.writeBytes(usernameLength)
   packedData.writeBytes(username)
+  packedData.pad(32 - username.length)
   packedData.writeBytes(colour)
   packedData.writeBytes(clientIdLength)
   packedData.writeBytes(clientId)
+  packedData.pad(32 - clientId.length)
 
   // Encrypt the data.
   const data = encrypt(packedData.data, MESSAGE_TYPE, key)

src/messages/userDataResponse.ts

@@ -33,9 +33,11 @@ export function packUserDataResponseMessage (properties: UserDataResponseMessage
   const packedData = new SmartBuffer()
   packedData.writeBytes(usernameLength)
   packedData.writeBytes(username)
+  packedData.pad(32 - username.length)
   packedData.writeBytes(colour)
   packedData.writeBytes(clientIdLength)
   packedData.writeBytes(clientId)
+  packedData.pad(32 - clientId.length)
 
   // Return encrypted data.
   const data = encrypt(packedData.data, MESSAGE_TYPE, key)

src/utilities/smart-buffer.ts

@@ -79,7 +79,8 @@ export class SmartBuffer {
   * @param length The number of bytes to pad.
   */
   pad (length: number): void {
-    this._data.push(...Array<number>(length))
+    this._data.push(...Array<number>(length).fill(0))
+    this.cursor += length
   }
 
   /**
@@ -100,7 +101,7 @@ export class SmartBuffer {
    */
   splice (start: number, deleteCount: number, ...items: number[]): void {
     if (this.length < start) {
-      this.pad(start)
+      this._data.push(...Array<number>(start))
     }
     this._data.splice(this.cursor, deleteCount, ...items)
   }