我正在构建一个应用程序，它会定期检查一些 RSS 提要是否有新内容。其中一些提要只能通过 https 访问，而另一些提要具有自签名或以某种方式损坏的证书。我希望能够始终检查它们。
请注意，安全性在此应用程序中不是问题，目标是以最小的努力访问内容。
我正在使用此代码来规避大多数证书问题:
/**
* Sets timeout values and user agent header, and ignores self signed ssl
* certificates to enable maximum coverage
*
* @param con
* @return
*/
public static URLConnection configureConnection(URLConnection con)
{
con.setRequestProperty(
"User-Agent",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11");
con.setConnectTimeout(30000);
con.setReadTimeout(40000);
if (con instanceof HttpsURLConnection)
{
HttpsURLConnection conHttps = (HttpsURLConnection) con;
TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager()
{
public java.security.cert.X509Certificate[] getAcceptedIssuers()
{
return null;
}
public void checkClientTrusted(
java.security.cert.X509Certificate[] certs, String authType)
{
}
public void checkServerTrusted(
java.security.cert.X509Certificate[] certs, String authType)
{
}
} };
HostnameVerifier allHostsValid = new HostnameVerifier()
{
@Override
public boolean verify(String arg0, SSLSession arg1)
{
return true;
}
};
// Install the all-trusting trust manager
try
{
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc
.getSocketFactory());
HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);
con = conHttps;
} catch (Exception e)
{
}
}
return con;
}
这适用于大多数网站，但在一个网站上我仍然遇到此异常:
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification pat
h to requested target
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1715)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:257)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:251)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1168)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:153)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:609)
at sun.security.ssl.Handshaker.process_record(Handshaker.java:545)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:963)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1208)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1235)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1219)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:440)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1139)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:397)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338)
at crawler.RSSReader.getNewArticles(RSSReader.java:53)
at crawler.Crawler.fetchFeed(Crawler.java:187)
at crawler.Crawler.main(Crawler.java:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:324)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:224)
at sun.security.validator.Validator.validate(Validator.java:235)
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:147)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:230)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:270)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1147)
... 20 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:197)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:255)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:319)
有谁知道我该如何解决这个问题？
最佳答案
here 有一个解决方案这优雅地为我工作。打电话
SSLUtilities.trustAllHostnames();
SSLUtilities.trustAllHttpsCertificates();
在您的 SSL 连接之前。
您还可以通过在 Internet 上搜索 java ssl trustall 来获取更多解决方案。
这是该解决方案的副本(以防将来链接断开):
import java.security.GeneralSecurityException;
import java.security.SecureRandom;
import java.security.cert.X509Certificate;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
/**
* This class provide various static methods that relax X509 certificate and
* hostname verification while using the SSL over the HTTP protocol.
*
* @author Francis Labrie
*/
public final class SSLUtilities {
/**
* Hostname verifier for the Sun's deprecated API.
*
* @deprecated see {@link #_hostnameVerifier}.
*/
private static com.sun.net.ssl.HostnameVerifier __hostnameVerifier;
/**
* Thrust managers for the Sun's deprecated API.
*
* @deprecated see {@link #_trustManagers}.
*/
private static com.sun.net.ssl.TrustManager[] __trustManagers;
/**
* Hostname verifier.
*/
private static HostnameVerifier _hostnameVerifier;
/**
* Thrust managers.
*/
private static TrustManager[] _trustManagers;
/**
* Set the default Hostname Verifier to an instance of a fake class that
* trust all hostnames. This method uses the old deprecated API from the
* com.sun.ssl package.
*
* @deprecated see {@link #_trustAllHostnames()}.
*/
private static void __trustAllHostnames() {
// Create a trust manager that does not validate certificate chains
if(__hostnameVerifier == null) {
__hostnameVerifier = new _FakeHostnameVerifier();
} // if
// Install the all-trusting host name verifier
com.sun.net.ssl.HttpsURLConnection.
setDefaultHostnameVerifier(__hostnameVerifier);
} // __trustAllHttpsCertificates
/**
* Set the default X509 Trust Manager to an instance of a fake class that
* trust all certificates, even the self-signed ones. This method uses the
* old deprecated API from the com.sun.ssl package.
*
* @deprecated see {@link #_trustAllHttpsCertificates()}.
*/
private static void __trustAllHttpsCertificates() {
com.sun.net.ssl.SSLContext context;
// Create a trust manager that does not validate certificate chains
if(__trustManagers == null) {
__trustManagers = new com.sun.net.ssl.TrustManager[]
{new _FakeX509TrustManager()};
} // if
// Install the all-trusting trust manager
try {
context = com.sun.net.ssl.SSLContext.getInstance("SSL");
context.init(null, __trustManagers, new SecureRandom());
} catch(GeneralSecurityException gse) {
throw new IllegalStateException(gse.getMessage());
} // catch
com.sun.net.ssl.HttpsURLConnection.
setDefaultSSLSocketFactory(context.getSocketFactory());
} // __trustAllHttpsCertificates
/**
* Return true if the protocol handler property java.
* protocol.handler.pkgs is set to the Sun's com.sun.net.ssl.
* internal.www.protocol deprecated one, false
* otherwise.
*
* @return true if the protocol handler
* property is set to the Sun's deprecated one, false
* otherwise.
*/
private static boolean isDeprecatedSSLProtocol() {
return("com.sun.net.ssl.internal.www.protocol".equals(System.
getProperty("java.protocol.handler.pkgs")));
} // isDeprecatedSSLProtocol
/**
* Set the default Hostname Verifier to an instance of a fake class that
* trust all hostnames.
*/
private static void _trustAllHostnames() {
// Create a trust manager that does not validate certificate chains
if(_hostnameVerifier == null) {
_hostnameVerifier = new FakeHostnameVerifier();
} // if
// Install the all-trusting host name verifier:
HttpsURLConnection.setDefaultHostnameVerifier(_hostnameVerifier);
} // _trustAllHttpsCertificates
/**
* Set the default X509 Trust Manager to an instance of a fake class that
* trust all certificates, even the self-signed ones.
*/
private static void _trustAllHttpsCertificates() {
SSLContext context;
// Create a trust manager that does not validate certificate chains
if(_trustManagers == null) {
_trustManagers = new TrustManager[] {new FakeX509TrustManager()};
} // if
// Install the all-trusting trust manager:
try {
context = SSLContext.getInstance("SSL");
context.init(null, _trustManagers, new SecureRandom());
} catch(GeneralSecurityException gse) {
throw new IllegalStateException(gse.getMessage());
} // catch
HttpsURLConnection.setDefaultSSLSocketFactory(context.
getSocketFactory());
} // _trustAllHttpsCertificates
/**
* Set the default Hostname Verifier to an instance of a fake class that
* trust all hostnames.
*/
public static void trustAllHostnames() {
// Is the deprecated protocol setted?
if(isDeprecatedSSLProtocol()) {
__trustAllHostnames();
} else {
_trustAllHostnames();
} // else
} // trustAllHostnames
/**
* Set the default X509 Trust Manager to an instance of a fake class that
* trust all certificates, even the self-signed ones.
*/
public static void trustAllHttpsCertificates() {
// Is the deprecated protocol setted?
if(isDeprecatedSSLProtocol()) {
__trustAllHttpsCertificates();
} else {
_trustAllHttpsCertificates();
} // else
} // trustAllHttpsCertificates
/**
* This class implements a fake hostname verificator, trusting any host
* name. This class uses the old deprecated API from the com.sun.
* ssl package.
*
* @author Francis Labrie
*
* @deprecated see {@link SSLUtilities.FakeHostnameVerifier}.
*/
public static class _FakeHostnameVerifier
implements com.sun.net.ssl.HostnameVerifier {
/**
* Always return true, indicating that the host name is an
* acceptable match with the server's authentication scheme.
*
* @param hostname the host name.
* @param session the SSL session used on the connection to
* host.
* @return the true boolean value
* indicating the host name is trusted.
*/
public boolean verify(String hostname, String session) {
return(true);
} // verify
} // _FakeHostnameVerifier
/**
* This class allow any X509 certificates to be used to authenticate the
* remote side of a secure socket, including self-signed certificates. This
* class uses the old deprecated API from the com.sun.ssl
* package.
*
* @author Francis Labrie
*
* @deprecated see {@link SSLUtilities.FakeX509TrustManager}.
*/
public static class _FakeX509TrustManager
implements com.sun.net.ssl.X509TrustManager {
/**
* Empty array of certificate authority certificates.
*/
private static final X509Certificate[] _AcceptedIssuers =
new X509Certificate[] {};
/**
* Always return true, trusting for client SSL
* chain peer certificate chain.
*
* @param chain the peer certificate chain.
* @return the true boolean value
* indicating the chain is trusted.
*/
public boolean isClientTrusted(X509Certificate[] chain) {
return(true);
} // checkClientTrusted
/**
* Always return true, trusting for server SSL
* chain peer certificate chain.
*
* @param chain the peer certificate chain.
* @return the true boolean value
* indicating the chain is trusted.
*/
public boolean isServerTrusted(X509Certificate[] chain) {
return(true);
} // checkServerTrusted
/**
* Return an empty array of certificate authority certificates which
* are trusted for authenticating peers.
*
* @return a empty array of issuer certificates.
*/
public X509Certificate[] getAcceptedIssuers() {
return(_AcceptedIssuers);
} // getAcceptedIssuers
} // _FakeX509TrustManager
/**
* This class implements a fake hostname verificator, trusting any host
* name.
*
* @author Francis Labrie
*/
public static class FakeHostnameVerifier implements HostnameVerifier {
/**
* Always return true, indicating that the host name is
* an acceptable match with the server's authentication scheme.
*
* @param hostname the host name.
* @param session the SSL session used on the connection to
* host.
* @return the true boolean value
* indicating the host name is trusted.
*/
public boolean verify(String hostname,
javax.net.ssl.SSLSession session) {
return(true);
} // verify
} // FakeHostnameVerifier
/**
* This class allow any X509 certificates to be used to authenticate the
* remote side of a secure socket, including self-signed certificates.
*
* @author Francis Labrie
*/
public static class FakeX509TrustManager implements X509TrustManager {
/**
* Empty array of certificate authority certificates.
*/
private static final X509Certificate[] _AcceptedIssuers =
new X509Certificate[] {};
/**
* Always trust for client SSL chain peer certificate
* chain with any authType authentication types.
*
* @param chain the peer certificate chain.
* @param authType the authentication type based on the client
* certificate.
*/
public void checkClientTrusted(X509Certificate[] chain,
String authType) {
} // checkClientTrusted
/**
* Always trust for server SSL chain peer certificate
* chain with any authType exchange algorithm types.
*
* @param chain the peer certificate chain.
* @param authType the key exchange algorithm used.
*/
public void checkServerTrusted(X509Certificate[] chain,
String authType) {
} // checkServerTrusted
/**
* Return an empty array of certificate authority certificates which
* are trusted for authenticating peers.
*
* @return a empty array of issuer certificates.
*/
public X509Certificate[] getAcceptedIssuers() {
return(_AcceptedIssuers);
} // getAcceptedIssuers
} // FakeX509TrustManager
} // SSLUtilities
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