<?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:----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----ATTACHMENT:----OTc0MDQ4MTAwNDMwMzc2NyA5MjkzMzM5NTA5NDIyMDUyIDk5MDU4MjM5MjI0MDAwNTI=