oss 计算sign签名获取临时token 规范请求字符串

本文链接：https://blog.youkuaiyun.com/junerun/article/details/103644016

本文介绍了一种通过PHP脚本获取阿里云STS服务的临时访问令牌的方法，详细展示了如何构造请求参数、计算签名并发送HTTP请求以获得包含临时AccessKey、SecretKey及SecurityToken的响应。

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获取临时token

    //获取临时token
    function get_token(){
        $url1='https://sts.aliyuncs.com';
        $array=[
            'Action'=>'AssumeRole',
            'SignatureVersion'=>'1.0',
            'Version'=>'2015-04-01',
            'RoleArn'=>ROLE_ARN, //阿里云角色名称
            'RoleSessionName'=>ROLE_SESSION_NAME, //阿里云获取
            'Format'=>'JSON',
            'Timestamp'=>date('Y-m-d\TH:i:s\Z', time() - date('Z')),
            'AccessKeyId'=>ACCESSKEYID, //阿里云accesskeyid
            'SignatureMethod'=>'HMAC-SHA1',
            'SignatureNonce'=>substr(md5(rand(1, 99999999)), rand(1, 9), 14)
        ];
        $get_sign=get_sign($array,'GET');//获取sign签名 get_sign方法在下方↓
        $array['Signature']=$get_sign['hmac']; //计算完签名之后，将签名放入请求数组
        $uri = http_build_query($array);
        $url = 'https://sts.aliyuncs.com/?'.$uri;
        $data=curl_get($url); // 请求方式与获取sign签名一致 get
        $data=json_decode($data,true);
        return $data??'';
    }

计算签名sign：

    //获取sign
    function get_sign($params,$mothod='GET'){
        //获取签名
        ksort($params); //字典化排序
        $stringToSign=strtoupper($mothod).'&'.percentEncode('/').'&';  //precentEncode规范化请求字符串↓
        $tmp = "";
        foreach ($params as $key => $val) {
            $tmp.='&'.percentEncode($key).'='.percentEncode($val);
        }
        $tmp=trim($tmp,'&');
        $stringToSign = $stringToSign.percentEncode($tmp);
        $key=ACCESS_KEY_SECRET.'&';  //阿里云accesskeysecret
        $hmac=base64_encode(hash_hmac("sha1",$stringToSign,$key,true));//hash_hmac — 使用 HMAC 方法生成带有密钥的哈希值
        return ['hmac'=>$hmac,'stringToSign'=>$stringToSign];
    }

规范化请求字符串

//规范化请求字符串
    function percentEncode($value = null)
    {
        $en = urlencode($value);
        $en = str_replace("+","%20",$en);
        $en = str_replace("*","%2A",$en);
        $en = str_replace("%7E","~",$en);
        return $en;
    }