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<?php
namespace WPSynchro\Transport;
use WPSynchro\Transport\TransferAccessKey;
/**
* Transfer token
* @since 1.6.0
*/
class TransferToken
{
const TOKEN_ALGORITM = "sha256";
const TOKEN_OPTION_NAME = "wpsynchro_current_transfer";
/**
* Get transfer token based
* @since 1.0.0
*/
public static function getTransferToken($accesskey, $jobtoken)
{
return hash(self::TOKEN_ALGORITM, $accesskey . $jobtoken);
}
/**
* Validate transfer token
* @since 1.0.0
*/
public static function validateTransferToken($token_to_validate)
{
$jobtoken = "";
// Check if is valid transfer token
$current_transfer = get_option(self::TOKEN_OPTION_NAME, null);
if (is_object($current_transfer)) {
// Transfer exist, so check if it has activity or old
if ($current_transfer->last_activity > (time() - $current_transfer->lifetime)) {
$jobtoken = $current_transfer->token;
// update last_activity
$current_transfer->last_activity = time();
update_option(self::TOKEN_OPTION_NAME, $current_transfer, false);
} else {
// Too old
return false;
}
} else {
// Does not exist
return false;
}
$expected_transfer_token = self::getTransferToken(TransferAccessKey::getAccessKey(), $jobtoken);
if (hash_equals($expected_transfer_token, $token_to_validate)) {
return true;
}
return false;
}
/**
* Set new token
* @since 1.6.1
*/
public static function setNewToken($lifespan)
{
$transfer = new \stdClass();
$transfer->token = hash('sha256', openssl_random_pseudo_bytes(30));
$transfer->last_activity = time();
$transfer->lifetime = $lifespan;
update_option(self::TOKEN_OPTION_NAME, $transfer, false);
return $transfer->token;
}
/**
* Delete transfer token
* @since 1.6.0
*/
public static function deleteTransferToken()
{
delete_option(self::TOKEN_OPTION_NAME);
}
}
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