java.security.cert.CertificateException: No subject alternative names present;
I am using WSO2 API Manager version 1.9.1. In this tool, I publish my sample project (i.e., proxied) and subscribe that project to get consumer key and secret. This tool also gives me CURL command which works fine.
The below CURL command which runs fine.
curl -k -d "grant_type=password&username=XXXXX&password=XXXXX" -H "Authorization: Basic XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX, Content-Type: application/x-www-form-urlencoded" https://XXXXXXXXXXX:XXXX/token
Now I'm trying to developed the java code using RestTemplate which will connect to SSL protected site without cert verification i.e., insecure way looking at above CURL command.
So far I developed below code, but when I run I see following error coming.
public static void main(String[] args) {
HttpHeaders headers = new HttpHeaders();
headers.add("Accept", "application/json");
headers.add("Content-Type", MediaType.APPLICATION_FORM_URLENCODED.toString());
headers.add("Authorization", "Basic XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
String url = "https://XXXXXXXXXXXXXX:XXXX/token";
String data = "grant_type=password&username=XXXXX&password=XXXXX";
RestTemplate restTemplate = new RestTemplate();
HttpEntity<String> entity = new HttpEntity<String>(data,headers);
HttpEntity<String> response = restTemplate.exchange(url, HttpMethod.POST, entity, String.class);
System.out.println("RESPONSE : "+response.getBody());
}
The error I am facing. Please suggest how we can connect to SSL site insecure way, the same curl command does?
Exception in thread "main" org.springframework.web.client.ResourceAccessException: I/O error on POST request for "https://XXXXXXXXXXX:8243/token":java.security.cert.CertificateException: No subject alternative names present; nested exception is javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: No subject alternative names present
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:580)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:530)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:448)
at com.java.wso2.TokenDemo.main(TokenDemo.java:74)
Caused by: javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: No subject alternative names present
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1937)
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:1478)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:212)
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:1050)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1363)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1391)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1375)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:563)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:153)
at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:81)
at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:569)
... 3 more
How we can solve this error? Off-course my issue is not similar to javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: No subject alternative names present
Answer
The following issue can be solve by applying following code, which connect to SSL protected site in a insecure way. (Note: In order to connect to SSL site with cert enable you need to add the tomcat SSL configuration).
The following code works fine.
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import javax.net.ssl.HostnameVerifier;
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 org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.web.client.RestTemplate;
static {
disableSslVerification();
}
private static void disableSslVerification() {
try{
// Create a trust manager that does not validate certificate chains
TrustManager[] trustAllCerts = new TrustManager[] {new X509TrustManager() {
public X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted(X509Certificate[] certs, String authType) {
}
public void checkServerTrusted(X509Certificate[] certs, String authType) {
}
}
};
// Install the all-trusting trust manager
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() {
public boolean verify(String hostname, SSLSession session) {
return true;
}
};
// Install the all-trusting host verifier
HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (KeyManagementException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
HttpHeaders headers = new HttpHeaders();
headers.add("Accept", "application/json");
headers.add("Content-Type", MediaType.APPLICATION_FORM_URLENCODED.toString());
headers.add("Authorization", "Basic XXXXXXXXXXXXXXXXXXXXXXXXXXXX");
String url = "https://XXXXXXXXXXXXX:XXXX/token";
String dataJSON = "grant_type=password&username=XXXXX&password=XXXXX";
RestTemplate restTemplate = new RestTemplate();
HttpEntity<String> entity = new HttpEntity<String>(dataJSON,headers);
HttpEntity<String> response = restTemplate.exchange(url, HttpMethod.POST, entity, String.class);
System.out.println("O/P : "+response.getBody());
}