<?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:----MTM0NTMzNDY0NTEwODUzNCA1NTkwNTU5MjgwODI4OTUzIDI4NTM0Njk4NzEwMzEyMzc=