晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Directory :  /home/rainic/www/oldTZh/wp-content/plugins/digits/Twilio/Security/

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current_dir [ Writeable ] document_root [ Writeable ]

 

Current File : /home/rainic/www/oldTZh/wp-content/plugins/digits/Twilio/Security/RequestValidator.php
<?php


namespace Twilio\Security;


class RequestValidator {

    protected $authToken;

    function __construct($authToken) {
        $this->authToken = $authToken;
    }

    public function validate($expectedSignature, $url, $data = array()) {
        if (is_array($data)) {
            return self::compare(
                $this->computeSignature($url, $data),
                $expectedSignature
            );
        } else {
            $queryString = explode('?', $url);
            $queryString = $queryString[1];
            parse_str($queryString, $params);

            return self::compare(
                $this->computeSignature($url),
                $expectedSignature
            ) && self::compare(
                $this->computeBodyHash($data),
                $params['bodySHA256']
            );
        }
    }

    /**
     * Time insensitive compare, function's runtime is governed by the length
     * of the first argument, not the difference between the arguments.
     * @param $a string First part of the comparison pair
     * @param $b string Second part of the comparison pair
     * @return bool True if $a == $b, false otherwise.
     */
    public
    static function compare($a, $b) {
        $result = true;

        if (strlen($a) != strlen($b)) {
            return false;
        }

        if (!$a && !$b) {
            return true;
        }

        $limit = strlen($a);

        for ($i = 0; $i < $limit; ++$i) {
            if ($a[$i] != $b[$i]) {
                $result = false;
            }
        }

        return $result;
    }

    public function computeSignature($url, $data = array()) {
        // sort the array by keys
        ksort($data);

        // append them to the data string in order
        // with no delimiters
        foreach ($data as $key => $value)
            $url .= "$key$value";

        return base64_encode(hash_hmac("sha1", $url, $this->authToken, true));
    }

    public function computeBodyHash($data = '') {
        return base64_encode(hash("sha256", $data, true));
    }

}

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