/**
* Fetches an Attestation by making multiple API calls to the Google and Casper APIs.
*
* @param string $nonce
* Base64 encoded value of the nonce
* sha256(username|password|timestamp|/loq/login)
*
* @return string
* The Client Auth Token
*
* @throws CasperException
* An exception is thrown if an error occurs.
*/
public function getSnapchatAttestation($nonce)
{
$response = parent::get("/snapchat/attestation/create");
if (!isset($response->binary)) {
throw new CasperException("Binary not found in Response");
}
$binary = base64_decode($response->binary);
$response = parent::externalRequest("https://www.googleapis.com/androidantiabuse/v1/x/create?alt=PROTO&key=AIzaSyBofcZsgLSS7BOnBjZPEkk4rYwzOIz-lTI", array("Content-Type: application/x-protobuf", "User-Agent: SafetyNet/7899000 (klte KOT49H); gzip"), $binary, true);
$protobuf = base64_encode($response);
$response = parent::post("/snapchat/attestation/attest", null, array("protobuf" => $protobuf, "nonce" => $nonce, "snapchat_version" => self::SNAPCHAT_VERSION));
if (!isset($response->binary)) {
throw new CasperException("Binary not found in Response");
}
$binary = base64_decode($response->binary);
$response = parent::externalRequest("https://www.googleapis.com/androidcheck/v1/attestations/attest?alt=JSON&key=AIzaSyDqVnJBjE5ymo--oBJt3On7HQx9xNm1RHA", array("Content-Type: application/x-protobuf", "User-Agent: SafetyNet/7899000 (klte KOT49H); gzip"), $binary, true);
$json = json_decode($response);
if ($json == null) {
throw new CasperException("Failed to decode response!");
}
if (!isset($json->signedAttestation)) {
throw new CasperException("Attestation not found in Response");
}
return $json->signedAttestation;
}
