esign_serve/app/Servers/ESign/comm/EsignUtilHelper.php

<?php
namespace App\Servers\ESign\comm;

/**
 * 常用工具类
 * @author  澄泓
 * @date  2022/08/18 15:40
 */
class EsignUtilHelper
{
    /**
     * 获取MD5
     * @param $bodyData
     * @return string
     */
    public static function getContentMd5($bodyData){
        return  base64_encode(md5($bodyData,true));
    }

    /**
     * 生成签名
     * @param $projectScert
     * @param $httpMethod
     * @param $accept
     * @param $contentType
     * @param $contentMd5
     * @param $date
     * @param $headers
     * @param $url
     * @return string
     */
    public static function getSignature($projectScert,$httpMethod,$accept,$contentType,$contentMd5,$date,$headers,$url){

        $stringToSign = $httpMethod . "\n" . $accept . "\n"  . $contentMd5 . "\n" . $contentType . "\n"  . $date . "\n" .$headers  ;
        if($headers != ''){
            $stringToSign .= "\n".$url;
        }else{
            $stringToSign .= $url;
        }
//        EsignLogHelper::printMsg($stringToSign);
        $signature = hash_hmac("sha256",$stringToSign, $projectScert, true);
        $signature = base64_encode($signature);
        return $signature;
    }


    // 判断是网络路径还是文件路径
    public static function isUrl($url){
        $parse = parse_url($url);
        $scheme = $parse['scheme'];
        $scheme = strtolower($scheme);
        if("http" == $scheme){
            return true;
        }

        if("https" == $scheme){
            return true;
        }
        return false;
    }

    /**
     * 生成13位时间戳
     * @return float
     */
    public static function getMillisecond() {
        list($t1, $t2) = explode(' ', microtime());
        return (float)sprintf('%.0f',(floatval($t1)+floatval($t2))*1000);
    }

    public static function jsonSer($obj){
    $json = array();
    foreach ($obj as $key => $value) {
        if($value==null) {
            continue;
        }
        $json[$key] = $value;
    }
    return $json;
    }

    /**
    获取文件的Content-MD5
    原理：1.先计算MD5加密的二进制数组（128位）
    2.再对这个二进制进行base64编码（而不是对32位字符串编码）
     */
    public static function getContentBase64Md5($filePath){
        //获取文件MD5的128位二进制数组
        $md5file = md5_file($filePath,true);
        //计算文件的Content-MD5
        $contentBase64Md5 = base64_encode($md5file);
        return $contentBase64Md5;
    }
}