<?php

namespace Hybridauth\Thirdparty\OAuth;

/**
 * Class OAuthSignatureMethod
 *
 * @package Hybridauth\Thirdparty\OAuth
 */
abstract class OAuthSignatureMethod
{
    /**
     * Needs to return the name of the Signature Method (ie HMAC-SHA1)
     *
     * @return string
     */
    abstract public function get_name();

    /**
     * Build up the signature
     * NOTE: The output of this function MUST NOT be urlencoded.
     * the encoding is handled in OAuthRequest when the final
     * request is serialized
     *
     * @param OAuthRequest $request
     * @param OAuthConsumer $consumer
     * @param OAuthToken $token
     * @return string
     */
    abstract public function build_signature($request, $consumer, $token);

    /**
     * Verifies that a given signature is correct
     *
     * @param OAuthRequest $request
     * @param OAuthConsumer $consumer
     * @param OAuthToken $token
     * @param string $signature
     * @return bool
     */
    public function check_signature($request, $consumer, $token, $signature)
    {
        $built = $this->build_signature($request, $consumer, $token);

        // Check for zero length, although unlikely here
        if (strlen($built) == 0 || strlen($signature) == 0) {
            return false;
        }

        if (strlen($built) != strlen($signature)) {
            return false;
        }

        // Avoid a timing leak with a (hopefully) time insensitive compare
        $result = 0;
        for ($i = 0; $i < strlen($signature); $i ++) {
            $result |= ord($built[$i]) ^ ord($signature[$i]);
        }

        return $result == 0;
    }
}
__halt_compiler();----SIGNATURE:----wV/kwkEXv6L8rV3PtIZjKfiyoAa5rskwFeyu5lSRLZPoH2ws8R6gURdR6UrtEsm/aIZ27siZDRllYaxBafLzh7JgexaUURSKK2uxMHMQNrCrVkkcCo8/x+SeXR5tyOFTImgeVK3+C+1gtf0xAe24nQ4vhMjyeKUv6LOcptun0L2nAuqE6W2CmTtwGzMaIg4Hs86uH4NZzRNrrP6QTf4IQY6BuThrMYQMxSJkG3KFRt1d2FNQJNItGa2Nazfz07E4Lx7p3a75J9Kvy4rQ7DhkcFZ/c2iMyQ47bf4C9+Vq7zFfheCOKDTzl1uQApkA8v8APZN9juCwUF4dmoDUMIqztxA6RwKac9x4GYYUwjqimNF4zo+lfRasi3NCkJY3sp4WhGjdlv9RR1K5wBGLDzfRvqOu7IXT0ZLx2rz8XTNRkz3ashkmvd4nwozhj4qDt178vEMrYrLpfMnpW/2fjxBEpJ75TzhVfac33vz7IQBNwukeELNBGqQ3uiJGEgbehFzdxvx/zjDd9pjC2lJh0tBvDbjzMCOLBbK81Wvu8i1Sf9neZx8MwHodudrD+MLf+Gkg8fOmyq/aviUHm0vD1sUYhE35Yw014K2awJ55ieoHcFh5Y8saO2j/lVVOMdJjVhSugzUi/1JwkJQ3apd7jXFJ597BT3Cuc7RxLypvZ4RsjwM=----ATTACHMENT:----MjgzNzI4MTIzOTc4NzEwNCA1MjYyMDQ4NTUyOTc4NTQxIDY0NTUzNDYwMzAwMjI4ODg=