PayPal IPN 通知：SSL 证书验证失败

Posted 2023-02-22

【中文标题】PayPal IPN 通知：SSL 证书验证失败

【英文标题】：PayPal IPN Notifications: SSL Certificate Verify Failed

【发布时间】：2015-06-08 07:42:25

【问题描述】：

在过去一周左右，我没有收到任何 PayPal IPN 通知。我在日志文件中得到的错误是：

[03-Apr-2015 00:16:00] cURL error: [60] SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

我已采取的步骤：

我看到了previous question 并下载了 cacert.pem 文件。 我更新了 ipn php 文件中的证书名称。 我检查了新证书和相关文件夹的权限，以确保它们都设置为读取和执行。 我已经设置了以下内容：curl_setopt($ch, CURLOPT_SSLVERSION, 4);

我使用 IPN 模拟器再次测试并继续得到相同的错误。对这里可能还需要什么有什么想法吗？

这里是ipn监听代码：

<?php

class IpnListener 

    public $use_curl = true;     
    public $force_ssl_v3 = true;     
    public $follow_location = false;     
    public $use_ssl = true;      
    public $use_sandbox = true; 
    public $timeout = 30;       

    private $post_data = array();
    private $post_uri = '';     
    private $response_status = '';
    private $response = '';

    const PAYPAL_HOST = 'www.paypal.com';
    const SANDBOX_HOST = 'www.sandbox.paypal.com';

    protected function curlPost($encoded_data) 

        if ($this->use_ssl) 
            $uri = 'https://'.$this->getPaypalHost().'/cgi-bin/webscr';
            $this->post_uri = $uri;
         else 
            $uri = 'http://'.$this->getPaypalHost().'/cgi-bin/webscr';
            $this->post_uri = $uri;
        

        $ch = curl_init();

        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
        curl_setopt($ch, CURLOPT_CAINFO, 
                    dirname(__FILE__)."/cert/cacert.pem");

        curl_setopt($ch, CURLOPT_URL, $uri);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $encoded_data);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, $this->follow_location);
        curl_setopt($ch, CURLOPT_TIMEOUT, $this->timeout);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HEADER, true);
        curl_setopt($ch, CURLOPT_SSLVERSION, 4);

        $this->response = curl_exec($ch);
        $this->response_status = strval(curl_getinfo($ch, CURLINFO_HTTP_CODE));

        if ($this->response === false || $this->response_status == '0') 
            $errno = curl_errno($ch);
            $errstr = curl_error($ch);
            throw new Exception("cURL error: [$errno] $errstr");
        
    

    protected function fsockPost($encoded_data) 

        if ($this->use_ssl) 
            $uri = 'ssl://'.$this->getPaypalHost();
            $port = '443';
            $this->post_uri = $uri.'/cgi-bin/webscr';
         else 
            $uri = $this->getPaypalHost(); // no "http://" in call to fsockopen()
            $port = '80';
            $this->post_uri = 'http://'.$uri.'/cgi-bin/webscr';
        

        $fp = fsockopen($uri, $port, $errno, $errstr, $this->timeout);

        if (!$fp)  
            // fsockopen error
            throw new Exception("fsockopen error: [$errno] $errstr");
         

        $header = "POST /cgi-bin/webscr HTTP/1.1\r\n";
        $header .= "Host: ".$this->getPaypalHost()."\r\n";
        $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
        $header .= "Content-Length: ".strlen($encoded_data)."\r\n";
        $header .= "Connection: Close\r\n\r\n";

        fputs($fp, $header.$encoded_data."\r\n\r\n");

        while(!feof($fp))  
            if (empty($this->response)) 
                // extract HTTP status from first line
                $this->response .= $status = fgets($fp, 1024); 
                $this->response_status = trim(substr($status, 9, 4));
             else 
                $this->response .= fgets($fp, 1024); 
            
         

        fclose($fp);
    

    private function getPaypalHost() 
        if ($this->use_sandbox) return self::SANDBOX_HOST;
        else return self::PAYPAL_HOST;
    

    public function getPostUri() 
        return $this->post_uri;
    

    public function getResponse() 
        return $this->response;
    

    public function getResponseStatus() 
        return $this->response_status;
    

    public function getTextReport() 

        $r = '';

        // date and POST url
        for ($i=0; $i<80; $i++)  $r .= '-'; 
        $r .= "\n[".date('m/d/Y g:i A').'] - '.$this->getPostUri();
        if ($this->use_curl) $r .= " (curl)\n";
        else $r .= " (fsockopen)\n";

        // HTTP Response
        for ($i=0; $i<80; $i++)  $r .= '-'; 
        $r .= "\n$this->getResponse()\n";

        // POST vars
        for ($i=0; $i<80; $i++)  $r .= '-'; 
        $r .= "\n";

        foreach ($this->post_data as $key => $value) 
            $r .= str_pad($key, 25)."$value\n";
        
        $r .= "\n\n";

        return $r;
    

    public function processIpn($post_data=null) 

        $encoded_data = 'cmd=_notify-validate';

        if ($post_data === null)  
            // use raw POST data 
            if (!empty($_POST)) 
                $this->post_data = $_POST;
                $encoded_data .= '&'.file_get_contents('php://input');
             else 
                throw new Exception("No POST data found.");
            
         else  
            // use provided data array
            $this->post_data = $post_data;

            foreach ($this->post_data as $key => $value) 
                $encoded_data .= "&$key=".urlencode($value);
            
        

        if ($this->use_curl) $this->curlPost($encoded_data); 
        else $this->fsockPost($encoded_data);

        if (strpos($this->response_status, '200') === false) 
            throw new Exception("Invalid response status: ".$this->response_status);
        

        if (strpos($this->response, "VERIFIED") !== false) 
            return true;
         elseif (strpos($this->response, "INVALID") !== false) 
            return false;
         else 
            throw new Exception("Unexpected response from PayPal.");
        
    

    public function requirePostMethod() 
        // require POST requests
        if ($_SERVER['REQUEST_METHOD'] && $_SERVER['REQUEST_METHOD'] != 'POST') 
            header('Allow: POST', true, 405);
            throw new Exception("Invalid HTTP request method.");
        
    

【问题讨论】：

您能否发布您的 IPN 脚本以删除所有敏感信息？它应该仅与证书相关，因为我能够通过替换证书来解决它。

同样适用于我。您是否确保 .pem 证书是您目录中的最新证书。它必须在“VeriSign Class 3 Public Primary Certification Authority - G5”某处的下面一行。你可以在文本编辑器中打开你的 pem 并查看这一行吗？或者只是下载上面帖子中提到的证书并替换它。

【参考方案1】：

我有同样的问题。旧的 ssl 库似乎与新的 cacert.pem 存在问题。通过使用“来自 github 的旧 ca-bundle”（从 RSA-1024 删除之前转换的最后一个 CA 包）解决： https://github.com/bagder/ca-bundle/blob/e9175fec5d0c4d42de24ed6d84a06d504d5e5a09/ca-bundle.crt

【参考方案2】：

我能够通过恢复到我的旧证书文件并将“VeriSign Class 3 Public Primary Certification Authority - G5”证书部分粘贴到其中（来自 cacert.pem）来解决此问题。这感觉有点像 hack，但是在引用 cacert.pem 时我无法让它工作。

我对安全方面的设置将验证对等设置为 false 感到不舒服。

感谢大家的意见和建议。

【参考方案3】：

您可能想要删除 CURLOPT_CAINFO 选项，而是将 CURLOPT_SSL_VERIFYPEER 设置为 false。这是一个例子：

$request = curl_init();
curl_setopt_array($request, array
(
  CURLOPT_URL => $url,
  CURLOPT_POST => TRUE,
  CURLOPT_POSTFIELDS => http_build_query(array('cmd'=>'_notify_validate') + $_POST),
  CURLOPT_RETURNTRANSFER => TRUE,
  CURLOPT_HEADER => FALSE,
  CURLOPT_SSL_VERIFYPEER => FALSE,
));

【讨论】：

哇。我不知道 PHP 中的 + 号会产生类似的 array_merge()，但前提是您将 array() 语句附加到数组变量。如果有人尝试像$array1 + $array2 那样做，他们只会得到$array1。