使用MATLAB的urlread命令处理无效的安全证书

Question

我正在使用MATLAB的urlread命令访问内部数据库,一切正常,直到服务被移动到安全服务器(即使用HTTPS地址而不是HTTP地址).现在urlread不再成功检索结果.它给出了一个错误:

下载URL时出错.您的网络连接可能已关闭或您的代理设置未正确配置.

我相信这个问题是因为如果我尝试直接访问该资源在Web浏览器中,我得到"不可信连接"警告这我能够通过将站点添加到例外列表通过该服务使用无效的数字证书.urlread没有明显的方法来处理这个问题.

引擎盖urlread下使用Java来访问Web资源,并在此行引发错误:

inputStream = urlConnection.getInputStream;

urlConnectionJava对象在哪里:sun.net.www.protocol.https.HttpsURLConnectionImpl.

有人建议解决这个问题吗？

Answer 1

考虑以下Java类.我用这个页面作为参考:

在HTTPS连接中禁用证书验证

C:\ MATLAB\MyJavaClasses\COM \计算器\ Downloader.java

package com.stackoverflow;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.cert.X509Certificate;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import javax.net.ssl.HostnameVerifier;

public class Downloader {
    public static String getData(String address) throws Exception {
        // Create a trust manager that does not validate certificate chains
        TrustManager[] trustAllCerts = new TrustManager[] {
            new X509TrustManager() {
                public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                    return null;
                }
                public void checkClientTrusted(X509Certificate[] certs, String authType) {
                }
                public void checkServerTrusted(X509Certificate[] certs, String authType) {
                }
            }
        };

        // Create a host name verifier that always passes
        HostnameVerifier allHostsValid = new HostnameVerifier() {
            public boolean verify(String hostname, SSLSession session) {
                return true;
            }
        };

        // Install the all-trusting trust manager
        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(null, trustAllCerts, new java.security.SecureRandom());
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());

        // Install the all-trusting host verifier
        HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);

        // open connection
        URL page = new URL(address);
        HttpURLConnection conn = (HttpURLConnection) page.openConnection();
        BufferedReader buff = new BufferedReader(new InputStreamReader(conn.getInputStream()));

        // read text
        String line;
        StringBuffer text = new StringBuffer();
        while ( (line = buff.readLine()) != null ) {
            //System.out.println(line);
            text.append(line + "\n");
        }
        buff.close();

        return text.toString();
    }

    public static void main(String[] argv) throws Exception {
        String str = getData("https://expired.badssl.com/");
        System.out.println(str);
    }
}

MATLAB

首先我们编译Java类(我们必须使用与MATLAB兼容的JDK版本):

>> version -java
>> system('javac C:\MATLAB\MyJavaClasses\com\stackoverflow\Downloader.java');

接下来我们将MATLAB实例化并使用它:

javaaddpath('C:\MATLAB\MyJavaClasses')
dl = com.stackoverflow.Downloader;
str = char(dl.getData('https://expired.badssl.com/'));
web(['text://' str], '-new')

以下是一些要测试错误SSL证书的URL:

urls = {
    'https://expired.badssl.com/'       % expired
    'https://wrong.host.badssl.com/'    % wrong host
    'https://self-signed.badssl.com/'   % self-signed
    'https://revoked.grc.com/'          % revoked
};

更新:我应该提到从R2014b开始,MATLAB有一个新的功能webread取代urlread.