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/noise-handler.ts

@@ -6,6 +6,7 @@ import type { BinaryNode } from '../WABinary'
 import { decodeBinaryNode } from '../WABinary'
 import { aesDecryptGCM, aesEncryptGCM, Curve, hkdf, sha256 } from './crypto'
 import type { ILogger } from './logger'
+import { decodeAndHydrate } from './proto-utils'
 
 const generateIV = (counter: number) => {
 	const iv = new ArrayBuffer(12)
@@ -112,7 +113,7 @@ export const makeNoiseHandler = ({
 
 			const certDecoded = decrypt(serverHello!.payload!)
 
-			const { intermediate: certIntermediate } = proto.CertChain.decode(certDecoded)
+			const { intermediate: certIntermediate } = decodeAndHydrate(proto.CertChain, certDecoded)
 
 			const { issuerSerial } = proto.CertChain.NoiseCertificate.Details.decode(certIntermediate!.details!)