如何绕过java中的ssl证书检查
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How to bypass ssl certificate checking in java
提问by Prasanta Biswas
I want access a SOAP webservice url having https hosted in a remote vm. I am getting an exception while accessing it using HttpURLConnection.
我想访问在远程虚拟机中托管 https 的 SOAP 网络服务 url。我在使用 HttpURLConnection 访问它时遇到异常。
Here's my code:
这是我的代码：
import javax.net.ssl.*;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
/**
* Created by prasantabiswas on 07/03/17.
*/
public class Main
{
public static void main(String [] args)
{
try
{
URL url = new URL("https://myhost:8913/myservice/service?wsdl");
HttpURLConnection http = null;
if (url.getProtocol().toLowerCase().equals("https")) {
trustAllHosts();
HttpsURLConnection https = (HttpsURLConnection) url.openConnection();
https.setHostnameVerifier(DO_NOT_VERIFY);
http = https;
} else {
http = (HttpURLConnection) url.openConnection();
}
String SOAPAction="";
// http.setRequestProperty("Content-Length", String.valueOf(b.length));
http.setRequestProperty("Content-Type", "text/xml; charset=utf-8");
http.setRequestProperty("SOAPAction", SOAPAction);
http.setRequestMethod("GET");
http.setDoOutput(true);
http.setDoInput(true);
OutputStream out = http.getOutputStream();
}
catch (Exception e)
{
e.printStackTrace();
}
}
final static HostnameVerifier DO_NOT_VERIFY = new HostnameVerifier() {
public boolean verify(String hostname, SSLSession session) {
return true;
}
};
private static void trustAllHosts() {
// Create a trust manager that does not validate certificate chains
TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return new java.security.cert.X509Certificate[] {};
}
public void checkClientTrusted(X509Certificate[] chain,
String authType) throws CertificateException
{
}
public void checkServerTrusted(X509Certificate[] chain,
String authType) throws CertificateException {
}
} };
// Install the all-trusting trust manager
try {
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection
.setDefaultSSLSocketFactory(sc.getSocketFactory());
} catch (Exception e) {
e.printStackTrace();
}
}
}
I'm getting the following exception:
我收到以下异常：
javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: Certificates does not conform to algorithm constraints
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1283)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1258)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:250)
at Main.main(Main.java:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.security.cert.CertificateException: Certificates does not conform to algorithm constraints
at sun.security.ssl.AbstractTrustManagerWrapper.checkAlgorithmConstraints(SSLContextImpl.java:1055)
at sun.security.ssl.AbstractTrustManagerWrapper.checkAdditionalTrust(SSLContextImpl.java:981)
at sun.security.ssl.AbstractTrustManagerWrapper.checkServerTrusted(SSLContextImpl.java:923)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491)
... 18 more
Tried different solution from the google search, Non of them worked. I want to avoid using keytool because I will be running my tests on different vm.
尝试了与谷歌搜索不同的解决方案，但都没有奏效。我想避免使用 keytool，因为我将在不同的虚拟机上运行我的测试。
Does anyone have any solution for this?
有没有人对此有任何解决方案？
回答by dereck
Try with Apache HTTP client, this works for me.
尝试使用 Apache HTTP 客户端，这对我有用。
SSLContextBuilder builder = new SSLContextBuilder();
builder.loadTrustMaterial(null, new TrustStrategy() {
public boolean isTrusted(final X509Certificate[] chain, String authType) throws CertificateException {
return true;
}
});
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(builder.build());
CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
// GET or POST request with the client
...
回答by Monish Sen
Edit :Understand the vulnerability this would cause before using it. This is by no means recommended for production use.
编辑：在使用之前了解这会导致的漏洞。这绝不是推荐用于生产用途。
The best way is to create a dummy trustmanager that trusts everything.
最好的方法是创建一个信任一切的虚拟信任管理器。
TrustManager[] dummyTrustManager = 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) {
}
} };
Then use the dummy trustmanager to initialize the SSL Context
然后使用dummy trustmanager来初始化SSL Context
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, dummyTrustManager, new java.security.SecureRandom());
Finally use the SSLContext to open connection
最后使用 SSLContext 打开连接
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
URL url = new URL("https://myhost:8913/myservice/service?wsdl");
This question has already been answered here in more detail Java: Overriding function to disable SSL certificate check
这个问题已经在这里更详细地回答了 Java: Overriding function to disable SSL certificate check
Update:
更新：
Above issue is due to certificate signature algorithm not being supported by Java. As per this post, later releases of Java 8 have disabled md5 algorithm.
上述问题是由于 Java 不支持证书签名算法。根据这篇文章，Java 8 的后续版本禁用了 md5 算法。
To enable md5 support, locate java.security file under <jre_home>/lib/security and locate the line (535)
要启用 md5 支持，请在 <jre_home>/lib/security 下找到 java.security 文件并找到行 (535)
jdk.certpath.disabledAlgorithms=MD2, MD5, RSA keySize < 1024,
and remove MD5
并删除 MD5
回答by Prasanta Biswas
Using X509ExtendedTrustManager instead of X509TrustManager() solved the problem. Here's the example:
使用 X509ExtendedTrustManager 而不是 X509TrustManager() 解决了这个问题。这是示例：
public void trustAllHosts()
{
try
{
TrustManager[] trustAllCerts = new TrustManager[]{
new X509ExtendedTrustManager()
{
@Override
public java.security.cert.X509Certificate[] getAcceptedIssuers()
{
return null;
}
@Override
public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType)
{
}
@Override
public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType)
{
}
@Override
public void checkClientTrusted(java.security.cert.X509Certificate[] xcs, String string, Socket socket) throws CertificateException
{
}
@Override
public void checkServerTrusted(java.security.cert.X509Certificate[] xcs, String string, Socket socket) throws CertificateException
{
}
@Override
public void checkClientTrusted(java.security.cert.X509Certificate[] xcs, String string, SSLEngine ssle) throws CertificateException
{
}
@Override
public void checkServerTrusted(java.security.cert.X509Certificate[] xcs, String string, SSLEngine ssle) throws CertificateException
{
}
}
};
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
// Create all-trusting host name verifier
HostnameVerifier allHostsValid = new HostnameVerifier()
{
@Override
public boolean verify(String hostname, SSLSession session)
{
return true;
}
};
// Install the all-trusting host verifier
HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);
}
catch (Exception e)
{
log.error("Error occurred",e);
}
}
回答by Johannes Brodwall
Instead of using HttpsURLConnection.setDefaultSSLSocketFactoryand your own implementation of TrustManageror X509ExtendedTrustManager, you can use TrustManagerFactorywith a KeyStorewith the certificate that issued the certificate you need to trust (for a self-signed certificate, this is the same as the host certificate) and call HttpsURLConnection.setSSLSocketFactoryon the specific instance. This is both less code and avoids the security problems with trusting all HTTPS certicates.
代替使用HttpsURLConnection.setDefaultSSLSocketFactory您自己的TrustManageror实现X509ExtendedTrustManager，您可以将TrustManagerFactoryaKeyStore与颁发您需要信任的证书的证书一起使用（对于自签名证书，这与主机证书相同）并调用HttpsURLConnection.setSSLSocketFactory特定实例。这既减少了代码，又避免了信任所有 HTTPS 证书的安全问题。
In main:
在main：
if (url.getProtocol().toLowerCase().equals("https")) {
HttpsURLConnection https = (HttpsURLConnection) url.openConnection();
https.setSSLSocketFactory(createSSLSocketFactory());
http = https;
}
The method createSSLSocketFactorylooks like this:
该方法createSSLSocketFactory如下所示：
private static SSLSocketFactory createSSLSocketFactory() {
File crtFile = new File("server.crt");
Certificate certificate = CertificateFactory.getInstance("X.509").generateCertificate(new FileInputStream(crtFile));
KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
keyStore.load(null, null);
keyStore.setCertificateEntry("server", certificate);
TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
trustManagerFactory.init(keyStore);
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, trustManagerFactory.getTrustManagers(), null);
return sslContext.getSocketFactory();
}
