I upgraded from Java 1.6 to Java 1.7 today.
Since then an error occur when I try to establish a connection to my webserver over SSL:
javax.net.ssl.SSLProtocolException: handshake alert: unrecognized_name
at sun.security.ssl.ClientHandshaker.handshakeAlert(ClientHandshaker.java:1288)
at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:1904)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1027)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1262)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1289)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1273)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:523)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1296)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at java.net.URL.openStream(URL.java:1035)
Here is the code:
SAXBuilder builder = new SAXBuilder();
Document document = null;
try {
url = new URL(https://some url);
document = (Document) builder.build(url.openStream());
} catch (NoSuchAlgorithmException ex) {
Logger.getLogger(DownloadLoadiciousComputer.class.getName()).log(Level.SEVERE, null, ex);
}
Its only a test project thats why I allow and use untrusted certificates with the code:
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) {
}
}
};
try {
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
} catch (Exception e) {
Logger.getLogger(DownloadManager.class.getName()).log(Level.SEVERE, null, e);
}
I sucessfully tried to connect to https://google.com.
where is my fault?
Thanks.
Java 7 introduced SNI support which is enabled by default. I have found out that certain misconfigured servers send an "Unrecognized Name" warning in the SSL handshake which is ignored by most clients... except for Java. As #Bob Kerns mentioned, the Oracle engineers refuse to "fix" this bug/feature.
As workaround, they suggest to set the jsse.enableSNIExtension property. To allow your programs to work without re-compiling, run your app as:
java -Djsse.enableSNIExtension=false yourClass
The property can also be set in the Java code, but it must be set before any SSL actions. Once the SSL library has loaded, you can change the property, but it won't have any effect on the SNI status. To disable SNI on runtime (with the aforementioned limitations), use:
System.setProperty("jsse.enableSNIExtension", "false");
The disadvantage of setting this flag is that SNI is disabled everywhere in the application. In order to make use of SNI and still support misconfigured servers:
Create a SSLSocket with the host name you want to connect to. Let's name this sslsock.
Try to run sslsock.startHandshake(). This will block until it is done or throw an exception on error. Whenever an error occurred in startHandshake(), get the exception message. If it equals to handshake alert: unrecognized_name, then you have found a misconfigured server.
When you have received the unrecognized_name warning (fatal in Java), retry opening a SSLSocket, but this time without a host name. This effectively disables SNI (after all, the SNI extension is about adding a host name to the ClientHello message).
For the Webscarab SSL proxy, this commit implements the fall-back setup.
I had what I believe the same issue is.
I found that I needed to adjust the Apache configuration to include a ServerName or ServerAlias for the host.
This code failed:
public class a {
public static void main(String [] a) throws Exception {
java.net.URLConnection c = new java.net.URL("https://mydomain.com/").openConnection();
c.setDoOutput(true);
c.getOutputStream();
}
}
And this code worked:
public class a {
public static void main(String [] a) throws Exception {
java.net.URLConnection c = new java.net.URL("https://google.com/").openConnection();
c.setDoOutput(true);
c.getOutputStream();
}
}
Wireshark revealed that during the TSL/SSL Hello the warning
Alert (Level: Warning, Description: Unrecognized Name), Server Hello
Was being sent from the server to the client.
It was only a warning, however, Java 7.1 then responded immediately back with a "Fatal, Description: Unexpected Message", which I assume means the Java SSL libraries don't like to see the warning of unrecognized name.
From the Wiki on Transport Layer Security (TLS):
112 Unrecognized name warning TLS only; client's Server Name Indicator specified a hostname not supported by the server
This led me to look at my Apache config files and I found that if I added a ServerName or ServerAlias for the name sent from the client/java side, it worked correctly without any errors.
<VirtualHost mydomain.com:443>
ServerName mydomain.com
ServerAlias www.mydomain.com
You can disable sending SNI records with the System property jsse.enableSNIExtension=false.
If you can change the code it helps to use SSLCocketFactory#createSocket() (with no host parameter or with a connected socket). In this case it will not send a server_name indication.
We also ran into this error on a new Apache server build.
The fix in our case was to define a ServerAlias in the httpd.conf that corresponded to the host name that Java was trying to connect to. Our ServerName was set to the internal host name. Our SSL cert was using the external host name, but that was not sufficient to avoid the warning.
To help debug, you can use this ssl command:
openssl s_client -servername <hostname> -connect <hostname>:443 -state
If there is a problem with that hostname, then it will print this message near the top of the output:
SSL3 alert read: warning:unrecognized name
I should also note that we did not get that error when using that command to connect to the internal host name, even though it did not match the SSL cert.
Instead of relying on the default virtual host mechanism in apache, you can define one last catchall virtualhost that uses an arbitrary ServerName and a wildcard ServerAlias, e.g.
ServerName catchall.mydomain.com
ServerAlias *.mydomain.com
In that way you can use SNI and apache will not send back the SSL warning.
Of course, this only works if you can describe all of your domains easily using a wildcard syntax.
It should be useful. To retry on a SNI error in Apache HttpClient 4.4 - the easiest way we came up with (see HTTPCLIENT-1522):
public class SniHttpClientConnectionOperator extends DefaultHttpClientConnectionOperator {
public SniHttpClientConnectionOperator(Lookup<ConnectionSocketFactory> socketFactoryRegistry) {
super(socketFactoryRegistry, null, null);
}
#Override
public void connect(
final ManagedHttpClientConnection conn,
final HttpHost host,
final InetSocketAddress localAddress,
final int connectTimeout,
final SocketConfig socketConfig,
final HttpContext context) throws IOException {
try {
super.connect(conn, host, localAddress, connectTimeout, socketConfig, context);
} catch (SSLProtocolException e) {
Boolean enableSniValue = (Boolean) context.getAttribute(SniSSLSocketFactory.ENABLE_SNI);
boolean enableSni = enableSniValue == null || enableSniValue;
if (enableSni && e.getMessage() != null && e.getMessage().equals("handshake alert: unrecognized_name")) {
TimesLoggers.httpworker.warn("Server received saw wrong SNI host, retrying without SNI");
context.setAttribute(SniSSLSocketFactory.ENABLE_SNI, false);
super.connect(conn, host, localAddress, connectTimeout, socketConfig, context);
} else {
throw e;
}
}
}
}
and
public class SniSSLSocketFactory extends SSLConnectionSocketFactory {
public static final String ENABLE_SNI = "__enable_sni__";
/*
* Implement any constructor you need for your particular application -
* SSLConnectionSocketFactory has many variants
*/
public SniSSLSocketFactory(final SSLContext sslContext, final HostnameVerifier verifier) {
super(sslContext, verifier);
}
#Override
public Socket createLayeredSocket(
final Socket socket,
final String target,
final int port,
final HttpContext context) throws IOException {
Boolean enableSniValue = (Boolean) context.getAttribute(ENABLE_SNI);
boolean enableSni = enableSniValue == null || enableSniValue;
return super.createLayeredSocket(socket, enableSni ? target : "", port, context);
}
}
and
cm = new PoolingHttpClientConnectionManager(new SniHttpClientConnectionOperator(socketFactoryRegistry), null, -1, TimeUnit.MILLISECONDS);
Use:
System.setProperty("jsse.enableSNIExtension", "false");
Restart your Tomcat (important)
Ran into this issue with spring boot and jvm 1.7 and 1.8. On AWS, we did not have the option to change the ServerName and ServerAlias to match (they are different) so we did the following:
In build.gradle we added the following:
System.setProperty("jsse.enableSNIExtension", "false")
bootRun.systemProperties = System.properties
That allowed us to bypass the issue with the "Unrecognized Name".
You cannot supply system properties to the jarsigner.exe tool, unfortunately.
I have submitted defect 7177232, referencing #eckes' defect 7127374 and explaining why it was closed in error.
My defect is specifically about the impact on the jarsigner tool, but perhaps it will lead them to reopening the other defect and addressing the issue properly.
UPDATE: Actually, it turns out that you CAN supply system properties to the Jarsigner tool, it's just not in the help message. Use jarsigner -J-Djsse.enableSNIExtension=false
I hit the same problem and it turned out that reverse dns was not setup correct, it pointed to wrong hostname for the IP. After I correct reverse dns and restart httpd, the warning is gone.
(if I don't correct reverse dns, adding ServerName did the trick for me as well)
My VirtualHost's ServerName was commented out by default. It worked after uncommenting.
If you are building a client with Resttemplate, you can only set the endpoint like this: https://IP/path_to_service and set the requestFactory.
With this solution you don't need to RESTART your TOMCAT or Apache:
public static HttpComponentsClientHttpRequestFactory requestFactory(CloseableHttpClient httpClient) {
TrustStrategy acceptingTrustStrategy = new TrustStrategy() {
#Override
public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
return true;
}
};
SSLContext sslContext = null;
try {
sslContext = org.apache.http.ssl.SSLContexts.custom()
.loadTrustMaterial(null, acceptingTrustStrategy)
.build();
} catch (Exception e) {
logger.error(e.getMessage(), e);
}
HostnameVerifier hostnameVerifier = new HostnameVerifier() {
#Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
};
final SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext,hostnameVerifier);
final Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create()
.register("http", new PlainConnectionSocketFactory())
.register("https", csf)
.build();
final PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(registry);
cm.setMaxTotal(100);
httpClient = HttpClients.custom()
.setSSLSocketFactory(csf)
.setConnectionManager(cm)
.build();
HttpComponentsClientHttpRequestFactory requestFactory =
new HttpComponentsClientHttpRequestFactory();
requestFactory.setHttpClient(httpClient);
return requestFactory;
}
I have also come across this issue whilst upgrading from Java 1.6_29 to 1.7.
Alarmingly, my customer has discovered a setting in the Java control panel which resolves this.
In the Advanced Tab you can check 'Use SSL 2.0 compatible ClientHello format'.
This seems to resolve the issue.
We are using Java applets in an Internet Explorer browser.
Hope this helps.
Here is solution for Appache httpclient 4.5.11. I had problem with cert which has subject wildcarded *.hostname.com. It returned me same exception, but I musn't use disabling by property System.setProperty("jsse.enableSNIExtension", "false"); because it made error in Google location client.
I found simple solution (only modifying socket):
import io.micronaut.context.annotation.Bean;
import io.micronaut.context.annotation.Factory;
import org.apache.http.client.HttpClient;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;
import javax.inject.Named;
import javax.net.ssl.SSLParameters;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.util.List;
#Factory
public class BeanFactory {
#Bean
#Named("without_verify")
public HttpClient provideHttpClient() {
SSLConnectionSocketFactory connectionSocketFactory = new SSLConnectionSocketFactory(SSLContexts.createDefault(), NoopHostnameVerifier.INSTANCE) {
#Override
protected void prepareSocket(SSLSocket socket) throws IOException {
SSLParameters parameters = socket.getSSLParameters();
parameters.setServerNames(List.of());
socket.setSSLParameters(parameters);
super.prepareSocket(socket);
}
};
return HttpClients.custom()
.setSSLSocketFactory(connectionSocketFactory)
.build();
}
}
I had the same problem with an Ubuntu Linux server running subversion when accessed via Eclipse.
It has shown that the problem had to do with a warning when Apache (re)started:
[Mon Jun 30 22:27:10 2014] [warn] NameVirtualHost *:80 has no VirtualHosts
... waiting [Mon Jun 30 22:27:11 2014] [warn] NameVirtualHost *:80 has no VirtualHosts
This has been due to a new entry in ports.conf, where another NameVirtualHost directive was entered alongside the directive in sites-enabled/000-default.
After removing the directive in ports.conf, the problem had vanished (after restarting Apache, naturally)
Just to add a solution here. This might help for LAMP users
Options +FollowSymLinks -SymLinksIfOwnerMatch
The above mentioned line in the virtual host configuration was the culprit.
Virtual Host Configuration when error
<VirtualHost *:80>
DocumentRoot /var/www/html/load/web
ServerName dev.load.com
<Directory "/var/www/html/load/web">
Options +FollowSymLinks -SymLinksIfOwnerMatch
AllowOverride All
Require all granted
Order Allow,Deny
Allow from All
</Directory>
RewriteEngine on
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^/(.*) https://%{HTTP_HOST}/$1 [NC,R=301,L]
</VirtualHost>
Working Configuration
<VirtualHost *:80>
DocumentRoot /var/www/html/load/web
ServerName dev.load.com
<Directory "/var/www/html/load/web">
AllowOverride All
Options All
Order Allow,Deny
Allow from All
</Directory>
# To allow authorization header
RewriteEngine On
RewriteCond %{HTTP:Authorization} ^(.*)
RewriteRule .* - [e=HTTP_AUTHORIZATION:%1]
# RewriteCond %{SERVER_PORT} !^443$
# RewriteRule ^/(.*) https://%{HTTP_HOST}/$1 [NC,R=301,L]
</VirtualHost>
There is an easier way where you can just use your own HostnameVerifier to implicitly trust certain connections. The issue comes with Java 1.7 where SNI extensions have been added and your error is due to a server misconfiguration.
You can either use "-Djsse.enableSNIExtension=false" to disable SNI across the whole JVM or read my blog where I explain how to implement a custom verifier on top of a URL connection.
Related
I connected with VPN to setup the inventory API to get product list and it works fine. Once I get the result from the web-service and i bind to UI. And also I integrated PayPal with my application for make Express checkout when I make a call for payment I'm facing this error. I use servlet for back-end process. Can any one say how to fix this issue?
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException:
PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException:
unable to find valid certification path to requested target
First, you need to obtain the public certificate from the server you're trying to connect to. That can be done in a variety of ways, such as contacting the server admin and asking for it, using OpenSSL to download it, or, since this appears to be an HTTP server, connecting to it with any browser, viewing the page's security info, and saving a copy of the certificate. (Google should be able to tell you exactly what to do for your specific browser.)
Now that you have the certificate saved in a file, you need to add it to your JVM's trust store. At $JAVA_HOME/jre/lib/security/ for JREs or $JAVA_HOME/lib/security for JDKs, there's a file named cacerts, which comes with Java and contains the public certificates of the well-known Certifying Authorities. To import the new cert, run keytool as a user who has permission to write to cacerts:
keytool -import -file <the cert file> -alias <some meaningful name> -keystore <path to cacerts file>
It will most likely ask you for a password. The default password as shipped with Java is changeit. Almost nobody changes it. After you complete these relatively simple steps, you'll be communicating securely and with the assurance that you're talking to the right server and only the right server (as long as they don't lose their private key).
Whenever we are trying to connect to URL,
if server at the other site is running on https protocol and is mandating that we should communicate via information provided in certificate then
we have following option:
1) ask for the certificate(download the certificate), import this certificate in trustore. Default trustore java uses can be found in \Java\jdk1.6.0_29\jre\lib\security\cacerts, then if we retry to connect to the URL connection would be accepted.
2) In normal business cases, we might be connecting to internal URLS in organizations and we know that they are correct.
In such cases, you trust that it is the correct URL, In such cases above, code can be used which will not mandate to store the certificate to connect to particular URL.
for the point no 2 we have to follow below steps :
1) write below method which sets HostnameVerifier for HttpsURLConnection which returns true for all cases meaning we are trusting the trustStore.
// trusting all certificate
public void doTrustToCertificates() throws Exception {
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
TrustManager[] trustAllCerts = new TrustManager[]{
new X509TrustManager() {
public X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkServerTrusted(X509Certificate[] certs, String authType) throws CertificateException {
return;
}
public void checkClientTrusted(X509Certificate[] certs, String authType) throws CertificateException {
return;
}
}
};
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
HostnameVerifier hv = new HostnameVerifier() {
public boolean verify(String urlHostName, SSLSession session) {
if (!urlHostName.equalsIgnoreCase(session.getPeerHost())) {
System.out.println("Warning: URL host '" + urlHostName + "' is different to SSLSession host '" + session.getPeerHost() + "'.");
}
return true;
}
};
HttpsURLConnection.setDefaultHostnameVerifier(hv);
}
2) write below method, which calls doTrustToCertificates before trying to connect to URL
// connecting to URL
public void connectToUrl(){
doTrustToCertificates();//
URL url = new URL("https://www.example.com");
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
System.out.println("ResponseCode ="+conn.getResponseCode());
}
This call will return response code = 200 means connection is successful.
For more detail and sample example you can refer to URL.
I believe that you are trying to connect to a something using SSL but that something is providing a certificate which is not verified by root certification authorities such as verisign.. In essence by default secure connections can only be established if the person trying to connect knows the counterparties keys or some other verndor such as verisign can step in and say that the public key being provided is indeed right..
ALL OS's trust a handful of certification authorities and smaller certificate issuers need to be certified by one of the large certifiers making a chain of certifiers if you get what I mean...
Anyways coming back to the point.. I had a similiar problem when programming a java applet and a java server ( Hopefully some day I will write a complete blogpost about how I got all the security to work :) )
In essence what I had to do was to extract the public keys from the server and store it in a keystore inside my applet and when I connected to the server I used this key store to create a trust factory and that trust factory to create the ssl connection. There are alterante procedures as well such as adding the key to the JVM's trusted host and modifying the default trust store on start up..
I did this around two months back and dont have source code on me right now.. use google and you should be able to solve this problem. If you cant message me back and I can provide you the relevent source code for the project .. Dont know if this solves your problem since you havent provided the code which causes these exceptions. Furthermore I was working wiht applets thought I cant see why it wont work on Serverlets...
P.S I cant get source code before the weekend since external SSH is disabled in my office :(
SSLHandshakeException can be resolved 2 ways.
Incorporating SSL
Get the SSL (by asking the source system administrator, can also
be downloaded by openssl command, or any browsers downloads the
certificates)
Add the certificate into truststore (cacerts) located at
JRE/lib/security
provide the truststore location in vm arguments as
"-Djavax.net.ssl.trustStore="
Ignoring SSL
For this #2, please visit my other answer on another stackoverflow website:
How to ingore SSL verification Ignore SSL Certificate Errors with Java
This is what I did to POST a JSON to a URL with insecure/invalid SSL certs using latest JDK 11 HttpClient:
// 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(
java.security.cert.X509Certificate[] certs, String authType) {
}
public void checkServerTrusted(
java.security.cert.X509Certificate[] certs, String authType) {
}
}
};
try {
// Install the all-trusting trust manager
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
// Creat HttpClient with new SSLContext.
HttpClient httpClient = HttpClient.newBuilder()
.connectTimeout(Duration.ofMillis(3 * 1000))
.sslContext(sc) // SSL context 'sc' initialised as earlier
.build();
// Create request.
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(<URL>))
.timeout(Duration.ofMinutes(1))
.header("Content-Type", "application/json")
.header("Accept", "application/json")
.POST(HttpRequest.BodyPublishers.ofString(<PAYLOAD JSON STRING>))
.build();
//Send Request
HttpResponse<String> response =
httpClient.send(request, HttpResponse.BodyHandlers.ofString());
//Access response JSON
String responseJson = response.body();
} catch (Exception e) {
throw new Exception(e);
}
I know the reason why browsers and java7 are not affected is because they send Server Name Indication-SNI as part of the SSL information. So, apache knows what virtual host to use before starting SSL handshake and returns the proper certificate. Java 6 doesn't support SNI. So My question is, how do I verify and allow certificate to be accepted in java 6.
I made a spring client to consume webservice, Here is my code
public class classname1 {
static {
System.setProperty("javax.net.ssl.trustStore", "E://Workspace//keystore");
System.setProperty("javax.net.ssl.trustStorePassword", "changeit");
System.setProperty("https.protocols", "SSLv3");
System.setProperty("https.protocols", "TLSv1");
}
static {
HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier()
{
public boolean verify(String hostname, SSLSession session)
{
if (hostname.equals("192.168.10.22"))
return true;
return false;
}
});
}
private static void main(String[] args) {
try {
SOAPConnectionFactory soapConnectionFactory = SOAPConnectionFactory.newInstance();
SOAPConnection soapConnection = soapConnectionFactory.createConnection();
String url = "https://192.168.10.22/getInformationSearch.asmx?wsdl";
SOAPMessage soapResponse = soapConnection.call(createSOAPRequest(), url);
printSOAPResponse(soapResponse);
soapConnection.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private static SOAPMessage createSOAPRequest() throws Exception {
// ... Code for request, which will be hitted to url
}
private static void printSOAPResponse(SOAPMessage soapResponse) throws Exception {
// ... Code for response, which will fetch information from webservice
// URL
}
}
As you can see code, I made two methods, 1. for Request createSOAPRequest() 2. for Response printSOAPResponse(). (Url name is changed in above snippet)
In main() method, below line will generate request and send that request to given url SOAPMessage soapResponse = soapConnection.call(createSOAPRequest(), url); after that it goes to static block as shown above HttpsURLConnection.setDefaultHostnameVerifier() method.
At that time,debugger says: ssl handshake failed and SSL peer shut down incorrectly. It happens only in JAVA 6 but these code working proper with java 7/8.
Instead of that static block, I have tried below code in java 6
HostnameVerifier hv = new HostnameVerifier() {
public boolean verify(String urlHostName,
SSLSession session) {
return true;
}
};
But it won't work anyhow!!!
I am using following jars xercesImpl.jar,saaj-api.jar,saaj-impl.jar,spring-ws-core-1.5.6.jar,spring-ws-security-1.5.6.jar and Certificate for this SSL domain has been imported into keystore and It works in java7/8, So there is no issue in truststore right? (I made 2 certificate using keytool of java 6 and 7 as well, both works fine in java7/8 but not in 6)
I followed this thread but it wont work. So is there any alternative way to verify certificate and get response in java 6 environment, or should I change any JAR ?
You can't if the server isn't configured to allow you to connect without SNI.
Without SNI, the server cannot tell which virtual host you want until after the SSL connection has been established.
To see the difference, if you have OpenSSL, you can use the s_client option to extract the different certificates presented, or perhaps note a failure to connect when you don't use SNI:
SNI:
echo | openssl s_client -servername www.virtualhost.com -connect 192.168.1.55:443 | openssl x509 -text
Replace 192.168.1.55 with the actual IP address of the server, and www.virtualhost.com with the host name of the virtual host you want to connect to. The echo command prepended to the pipeline prevents openssl from hanging in a wait for input.
Without SNI:
echo | openssl s_client -connect 192.168.1.55:443 | openssl x509 -text
Without SNI, you may see a completely different certificate, or you may get a connection error.
As you already mentioned Java 6 does not support SNI. But, the problem of missing SNI is not only with verifying the certificate (because the server sends the wrong certificate) but also that depending on the servers configuration the server will cause a handshake error if the SNI extension is not present and does not point to a hostname available at the server. And this is obviously the case here:
... ssl handshake failed and SSL peer shut down incorrectly. It happens only in JAVA 6 but these code working proper with java 7/8.
Trying to change the validation of the certificate as you've tried will not help at all in this case because the error occurs before the client even has a certificate to verify. This means that there is no way around it: you need to support SNI in your client if you want to communicate with this specific server.
I'm needing to ignore all SSL certificates in Java, but I can't for the life of me get it to work. I've looked through the following pages listed below already, but nothing seems to work on every https link.
stackoverflow.com/questions/19517538/ignoring-ssl-certificate-in-apache-httpclient-4-3
stackoverflow.com/questions/13470998/ignoring-ssl-validation-in-java
stackoverflow.com/questions/12060250/ignore-ssl-certificate-errors-with-java
stackoverflow.com/questions/2694281/ignore-certificate-errors-when-requesting-a-url-in-java
stackoverflow.com/questions/6681969/java-ignore-certificate-validation
www.nakov.com/blog/2009/07/16/disable-certificate-validation-in-java-ssl-connections/
code.google.com/p/misc-utils/wiki/JavaHttpsUrl
www.exampledepot.8waytrips.com/egs/javax.net.ssl/TrustAll.html
www.obsidianscheduler.com/blog/ignoring-self-signed-certificates-in-java/
java.dzone.com/articles/how-ignore-cert-and-host-name
gist.github.com/henrik242/1510165
I have a good reason for needing to do this so don't worry, but I really need to be able to do it. Basically, I'm needing to go through a list of internal https links and check to make sure that they are all still valid and aren't broken links. Some links works fine since the Java code ignores the certificate and can get an HTTP response header back, but others just timeout even though they work fine in my web browser. All of these links are internal company links.
I've tried using HttpsURLConnection as well as HttpGet and HttpClient. Could there be something else that I'm not thinking of, or something unrelated to Java that could be causing the pages to timeout? I just want to make sure the URL of the link exists. Here are the exceptions I am getting.
With HttpGet/SSLContextBuilder/PoolingHttpClientConnectionManager:
org.apache.http.conn.HttpHostConnectException: Connect to -removed- [-removed-] failed: Connection timed out: connect
With HttpsUrlConnection using X509TrustManager:
java.net.ConnectException: Connection timed out: connect
Specifically, I've tried the following and many variations of it based on the links posted above:
TrustManager[] trustAllCerts = new TrustManager[] {
new X509TrustManager() {
public void checkClientTrusted(X509Certificate[] chain, String authType) {}
public void checkServerTrusted(X509Certificate[] chain, String authType) {}
public X509Certificate[] getAcceptedIssuers() {
return null;
}
}
};
// Install the all-trusting trust manager
javax.net.ssl.SSLContext sc = null;
try {
sc = javax.net.ssl.SSLContext.getInstance("TLS");
sc.init(null, trustAllCerts, new SecureRandom());
// Create all-trusting host name verifier
HostnameVerifier allHostsValid = new HostnameVerifier() {
#Override
public boolean verify(String arg0, SSLSession arg1) {
return true;
}
};
// Install the all-trusting host verifier
HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);
}
I've also tried this as well as several variations: https://stackoverflow.com/a/19950935/1727920
Connection timeouts have nothing whatsoever to do with SSL certificates.
More likely you don't have the same HTTP Proxy settings as the browser. You need to set the system properties http.proxyHost and http.proxyPort to the same values used by the browser. If the HTTPS proxy settings are different from the HTTP proxy settings, set https.proxyHost and https.proxyPort accordingly.
EDIT For completeness: A lot of old sources erroneously mention a proxySet property. There is not and has never been such a property in the JDK. It was in the short-lived and long-defunct HotJava Bean of 1997. Similarly http.proxySet doesn't exist either. Proof: try setting them to false in circumstances where they should be true, and watch your program keep working.
I connected with VPN to setup the inventory API to get product list and it works fine. Once I get the result from the web-service and i bind to UI. And also I integrated PayPal with my application for make Express checkout when I make a call for payment I'm facing this error. I use servlet for back-end process. Can any one say how to fix this issue?
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException:
PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException:
unable to find valid certification path to requested target
First, you need to obtain the public certificate from the server you're trying to connect to. That can be done in a variety of ways, such as contacting the server admin and asking for it, using OpenSSL to download it, or, since this appears to be an HTTP server, connecting to it with any browser, viewing the page's security info, and saving a copy of the certificate. (Google should be able to tell you exactly what to do for your specific browser.)
Now that you have the certificate saved in a file, you need to add it to your JVM's trust store. At $JAVA_HOME/jre/lib/security/ for JREs or $JAVA_HOME/lib/security for JDKs, there's a file named cacerts, which comes with Java and contains the public certificates of the well-known Certifying Authorities. To import the new cert, run keytool as a user who has permission to write to cacerts:
keytool -import -file <the cert file> -alias <some meaningful name> -keystore <path to cacerts file>
It will most likely ask you for a password. The default password as shipped with Java is changeit. Almost nobody changes it. After you complete these relatively simple steps, you'll be communicating securely and with the assurance that you're talking to the right server and only the right server (as long as they don't lose their private key).
Whenever we are trying to connect to URL,
if server at the other site is running on https protocol and is mandating that we should communicate via information provided in certificate then
we have following option:
1) ask for the certificate(download the certificate), import this certificate in trustore. Default trustore java uses can be found in \Java\jdk1.6.0_29\jre\lib\security\cacerts, then if we retry to connect to the URL connection would be accepted.
2) In normal business cases, we might be connecting to internal URLS in organizations and we know that they are correct.
In such cases, you trust that it is the correct URL, In such cases above, code can be used which will not mandate to store the certificate to connect to particular URL.
for the point no 2 we have to follow below steps :
1) write below method which sets HostnameVerifier for HttpsURLConnection which returns true for all cases meaning we are trusting the trustStore.
// trusting all certificate
public void doTrustToCertificates() throws Exception {
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
TrustManager[] trustAllCerts = new TrustManager[]{
new X509TrustManager() {
public X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkServerTrusted(X509Certificate[] certs, String authType) throws CertificateException {
return;
}
public void checkClientTrusted(X509Certificate[] certs, String authType) throws CertificateException {
return;
}
}
};
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
HostnameVerifier hv = new HostnameVerifier() {
public boolean verify(String urlHostName, SSLSession session) {
if (!urlHostName.equalsIgnoreCase(session.getPeerHost())) {
System.out.println("Warning: URL host '" + urlHostName + "' is different to SSLSession host '" + session.getPeerHost() + "'.");
}
return true;
}
};
HttpsURLConnection.setDefaultHostnameVerifier(hv);
}
2) write below method, which calls doTrustToCertificates before trying to connect to URL
// connecting to URL
public void connectToUrl(){
doTrustToCertificates();//
URL url = new URL("https://www.example.com");
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
System.out.println("ResponseCode ="+conn.getResponseCode());
}
This call will return response code = 200 means connection is successful.
For more detail and sample example you can refer to URL.
I believe that you are trying to connect to a something using SSL but that something is providing a certificate which is not verified by root certification authorities such as verisign.. In essence by default secure connections can only be established if the person trying to connect knows the counterparties keys or some other verndor such as verisign can step in and say that the public key being provided is indeed right..
ALL OS's trust a handful of certification authorities and smaller certificate issuers need to be certified by one of the large certifiers making a chain of certifiers if you get what I mean...
Anyways coming back to the point.. I had a similiar problem when programming a java applet and a java server ( Hopefully some day I will write a complete blogpost about how I got all the security to work :) )
In essence what I had to do was to extract the public keys from the server and store it in a keystore inside my applet and when I connected to the server I used this key store to create a trust factory and that trust factory to create the ssl connection. There are alterante procedures as well such as adding the key to the JVM's trusted host and modifying the default trust store on start up..
I did this around two months back and dont have source code on me right now.. use google and you should be able to solve this problem. If you cant message me back and I can provide you the relevent source code for the project .. Dont know if this solves your problem since you havent provided the code which causes these exceptions. Furthermore I was working wiht applets thought I cant see why it wont work on Serverlets...
P.S I cant get source code before the weekend since external SSH is disabled in my office :(
SSLHandshakeException can be resolved 2 ways.
Incorporating SSL
Get the SSL (by asking the source system administrator, can also
be downloaded by openssl command, or any browsers downloads the
certificates)
Add the certificate into truststore (cacerts) located at
JRE/lib/security
provide the truststore location in vm arguments as
"-Djavax.net.ssl.trustStore="
Ignoring SSL
For this #2, please visit my other answer on another stackoverflow website:
How to ingore SSL verification Ignore SSL Certificate Errors with Java
This is what I did to POST a JSON to a URL with insecure/invalid SSL certs using latest JDK 11 HttpClient:
// 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(
java.security.cert.X509Certificate[] certs, String authType) {
}
public void checkServerTrusted(
java.security.cert.X509Certificate[] certs, String authType) {
}
}
};
try {
// Install the all-trusting trust manager
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
// Creat HttpClient with new SSLContext.
HttpClient httpClient = HttpClient.newBuilder()
.connectTimeout(Duration.ofMillis(3 * 1000))
.sslContext(sc) // SSL context 'sc' initialised as earlier
.build();
// Create request.
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(<URL>))
.timeout(Duration.ofMinutes(1))
.header("Content-Type", "application/json")
.header("Accept", "application/json")
.POST(HttpRequest.BodyPublishers.ofString(<PAYLOAD JSON STRING>))
.build();
//Send Request
HttpResponse<String> response =
httpClient.send(request, HttpResponse.BodyHandlers.ofString());
//Access response JSON
String responseJson = response.body();
} catch (Exception e) {
throw new Exception(e);
}
Using the Java URL class, I can connect to an external HTTPS server (such as our production site), but using a local URL I get following exception.
"SunCertPathBuilderException: unable to find valid certification path to requested target".
How do I get a valid certification path?
EDIT: I'm not using this URL to directly create a connection, I am passing the URL to an itext PDFReader, which is then having the connection issue.
Here was my solution that incorporates some of the ideas in this thread and peiced together with code from around the net.
All I do call this function and it sets the default Trust Manager and HostName Verifier for HttpsURLConnection. This might be undesirable for some because it will effect all HttpsURLConnections but I'm just writing a simple proxy so it worked for me.
private void setTrustAllCerts() throws Exception
{
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 ) { }
}
};
// 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(
new HostnameVerifier() {
public boolean verify(String urlHostName, SSLSession session) {
return true;
}
});
}
catch ( Exception e ) {
//We can not recover from this exception.
e.printStackTrace();
}
}
You probably need to setup a HostnameVerifier. Before connecting, you need add it to the connection object
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setHostnameVerifier(new HostnameVerifier() {
public boolean verify(String hostname, SSLSession session) {
// check hostname/session
return true;
}
});
conn.connect();
// read/write...
There certainly are some implementations out there, if you need one. You might want to look at HttpClient project too.
Another thing to look at is the TrustManager you are using. The error message suggests that the certificate presented by the server is not signed by a trusted root. Since you don't have direct control over the SSL socket that is created, I think your best bet is to initialize your own SSLContext with a TrustManager that's been setup with the root CA of the server's certificate chain. Then set this context as the default.
This is assuming you are using Java 6. The API is more limited in Java 5. You can get a default SSLSocketFactory, but there's no standard way to set it.
The problem it's complaining about is that when you create an SSL connection, the server must present a valid certificate to the client. You can write an appropriate endpoint in Java (HTTPServerSocket will do it I think) but it would require some hacking about to set it up. It's probably easier to set up a local web server with anything that handles SSL correctly --- Apache, lighttp, whatever --- and create a self-signed cert using the openssl tools.
Updated
Here's an example from the Java Almanac. http://www.exampledepot.com/egs/javax.net.ssl/Server.html
An SSL server socket requires certificates that it will send to clients for authentication. The certificates must be contained in a keystore whose location must be explicitly specified (there is no default). Following the example we describe how to create and specify a keystore for the SSL server socket to use.
try {
int port = 443;
ServerSocketFactory ssocketFactory = SSLServerSocketFactory.getDefault();
ServerSocket ssocket = ssocketFactory.createServerSocket(port);
// Listen for connections
Socket socket = ssocket.accept();
// Create streams to securely send and receive data to the client
InputStream in = socket.getInputStream();
OutputStream out = socket.getOutputStream();
// Read from in and write to out...
// Close the socket
in.close();
out.close();
} catch(IOException e) {
}
Specify the keystore of certificates using the javax.net.ssl.keyStore system property:
> java -Djavax.net.ssl.keyStore=mySrvKeystore -Djavax.net.ssl.keyStorePassword=123456 MyServer
It may also help you to add the certificate that the localhost server is using (I assume it's self-signed) to the JVM's keystore, using the "keytool" utility. This should have the effect of telling the JVM "you can trust this certificate".
I have ended up running a static method (only on dev) that installs a very trusting TrustManager (accepts everything), and also added a hostnameVerifier that always returns true (thanks sblundy).