/**
* Get next tree of node
*
* @param null $input
*
* @return null|ProtocolNode
* @throws \Exception
*/
public function nextTree($input = null)
{
if ($input != null) {
$this->input = $input;
}
$stanzaFlag = ($this->peekInt8() & 0xf0) >> 4;
$stanzaSize = $this->peekInt16(1);
if ($stanzaSize > strlen($this->input)) {
throw new \Exception("Incomplete message {$stanzaSize} != " . strlen($this->input));
}
$this->readInt24();
if ($stanzaFlag & 8) {
if (isset($this->key)) {
$realSize = $stanzaSize - 4;
$this->input = $this->key->decodeMessage($this->input, $realSize, 0, $realSize);
// . $remainingData;
} else {
throw new \Exception("Encountered encrypted message, missing key");
}
}
if ($stanzaSize > 0) {
return $this->nextTreeInternal();
}
return null;
}
/**
* Authenticate with the Whatsapp Server.
*
* @return String
* Returns binary string
*/
protected function authenticate()
{
$keys = KeyStream::generateKeys(base64_decode($this->password), $this->challengeData);
$this->inputKey = new KeyStream($keys[2], $keys[3]);
$this->outputKey = new KeyStream($keys[0], $keys[1]);
//$phone = $this->dissectPhone();
$array = "" . $this->phoneNumber . $this->challengeData;
// . time() . static::WHATSAPP_USER_AGENT . " MccMnc/" . str_pad($phone["mcc"], 3, "0", STR_PAD_LEFT) . "001";
$response = $this->outputKey->encodeMessage($array, 0, 4, strlen($array) - 4);
return $response;
}
