如何绕过java中的ssl证书检查
如何绕过java中的ssl证书检查
提问于 2017-03-15 10:14:08
我希望访问托管在远程vm中的具有https的url。在使用HttpURLConnection访问它时，我得到了一个异常。
这是我的密码：
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();
}
}
}我得到了以下例外：
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vm上运行我的测试。
有谁能解决这个问题吗？
回答 4
Stack Overflow用户
回答已采纳
发布于 2017-11-01 08:30:45
使用X509ExtendedTrustManager而不是X509TrustManager()解决了这个问题。下面是一个例子：
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);
}
}Stack Overflow用户
发布于 2017-03-15 10:33:38
编辑:理解在使用它之前会造成的漏洞。这绝不是推荐用于生产用途的。
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) {
}
} };然后使用虚拟信任管理器初始化SSL上下文。
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, dummyTrustManager, new java.security.SecureRandom());最后，使用SSLContext打开连接
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
URL url = new URL("https://myhost:8913/myservice/service?wsdl");这个问题已经在这里得到了更详细的回答，Java:禁用SSL证书检查的重写功能。
更新：
以上问题是由于Java不支持证书签名算法造成的。根据这个职位，Java8的后续版本已经禁用了md5算法。
要启用md5支持，请在/lib/security下找到java.security文件，并定位行(535)
jdk.certpath.disabledAlgorithms=MD2, MD5, RSA keySize < 1024, 并删除MD5
Stack Overflow用户
发布于 2017-03-15 10:32:20
尝试使用Apache客户端，这对我是有效的。
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
...页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/42806709
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