fix: harden Protobuf Deserialization and Refactor Utilities (#1820)

* refactor: reorganize browser utility functions and improve buffer handling

* fix: harden protobuf deserialization and clean up code

* refactor: simplify data handling in GroupCipher and SenderKey classes

* fix: Ensure consistent Buffer hydration and remove redundant code

* refactor: update decodeAndHydrate calls to use proto types for improved type safety

src/Utils/decode-wa-message.ts

@@ -16,6 +16,7 @@ import {
 } from '../WABinary'
 import { unpadRandomMax16 } from './generics'
 import type { ILogger } from './logger'
+import { decodeAndHydrate } from './proto-utils'
 
 const getDecryptionJid = async (sender: string, repository: SignalRepositoryWithLIDStore): Promise<string> => {
 	if (!sender.includes('@s.whatsapp.net')) {
@@ -220,7 +221,7 @@ export const decryptMessageNode = (
 			if (Array.isArray(stanza.content)) {
 				for (const { tag, attrs, content } of stanza.content) {
 					if (tag === 'verified_name' && content instanceof Uint8Array) {
-						const cert = proto.VerifiedNameCertificate.decode(content)
+						const cert = decodeAndHydrate(proto.VerifiedNameCertificate, content)
 						const details = proto.VerifiedNameCertificate.Details.decode(cert.details)
 						fullMessage.verifiedBizName = details.verifiedName
 					}
@@ -273,7 +274,8 @@ export const decryptMessageNode = (
 								throw new Error(`Unknown e2e type: ${e2eType}`)
 						}
 
-						let msg: proto.IMessage = proto.Message.decode(
+						let msg: proto.IMessage = decodeAndHydrate(
+							proto.Message,
 							e2eType !== 'plaintext' ? unpadRandomMax16(msgBuffer) : msgBuffer
 						)
 						msg = msg.deviceSentMessage?.message || msg