XML-RPC over SSL in MATLAB

Hello. I am trying to access a server that uses a xml-rpc communication layer with ssl. The only documentation I have found for xmlrpc in MATLAB is here: https://wiki.nbic.nl/index.php/Matlab_XMLRPC. I have downloaded the following JAR files and added their paths to $matlabroot/toolbox/local/classpath.txt:

• ws-commons-util-1.0.2.jar
• xmlrpc-client-3.1.3.jar
• xmlrpc-common-3.1.3.jar
• xmlrpc-server-3.1.3.jar

My code looks something like this:

username    = 'username';
password    = 'password';
ip          = '55.555.55.555';
port        = 8080;
xmlrpc_url  = sprintf('https://%s:%s@%s:%i/',...
              username,password,ip,port);

client = javaObject('org.apache.xmlrpc.client.XmlRpcClient')
config = javaObject('org.apache.xmlrpc.client.XmlRpcClientConfigImpl')
url = javaObject('java.net.URL', xmlrpc_url)
config.setServerURL(url)
client.setConfig(config)
client.execute('list.Methods', '')

When I run it I get the following errors:

Java exception occurred:
org.apache.xmlrpc.XmlRpcException: Failed to read server's response:
java.security.cert.CertificateException: No subject alternative names
present

  at
    org.apache.xmlrpc.client.XmlRpcStreamTransport.sendRequest(XmlRpcStreamTransport.java:161)

  at
    org.apache.xmlrpc.client.XmlRpcHttpTransport.sendRequest(XmlRpcHttpTransport.java:143)

  at
    org.apache.xmlrpc.client.XmlRpcSunHttpTransport.sendRequest(XmlRpcSunHttpTransport.java:69)

  at
    org.apache.xmlrpc.client.XmlRpcClientWorker.execute(XmlRpcClientWorker.java:56)

  at
    org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:167)

  at
    org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:158)

  at
    org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:147)

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:1959)

  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:1514)

  at
    sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)

  at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1026)

  at sun.security.ssl.Handshaker.process_record(Handshaker.java:961)

  at
    sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1072)

  at
    sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)

  at
    sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)

  at
    sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)

  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:1316)

  at
    sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1291)

  at
    sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:250)

  at
    org.apache.xmlrpc.client.XmlRpcSunHttpTransport.writeRequest(XmlRpcSunHttpTransport.java:104)

  at
    org.apache.xmlrpc.client.XmlRpcStreamTransport.sendRequest(XmlRpcStreamTransport.java:151)

  ... 6 more

Caused by: java.security.cert.CertificateException: No subject
alternative names present

  at
    sun.security.util.HostnameChecker.matchIP(HostnameChecker.java:145)

  at
    sun.security.util.HostnameChecker.match(HostnameChecker.java:94)

  at
    sun.security.ssl.X509TrustManagerImpl.checkIdentity(X509TrustManagerImpl.java:455)

  at
    sun.security.ssl.X509TrustManagerImpl.checkIdentity(X509TrustManagerImpl.java:436)

  at
    sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:200)

  at
    sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)

  at
    sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1496)

  ... 20 more

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:1959)

  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:1514)

  at
    sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)

  at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1026)

  at sun.security.ssl.Handshaker.process_record(Handshaker.java:961)

  at
    sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1072)

  at
    sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)

  at
    sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)

  at
    sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)

  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:1316)

  at
    sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1291)

  at
    sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:250)

  at
    org.apache.xmlrpc.client.XmlRpcSunHttpTransport.writeRequest(XmlRpcSunHttpTransport.java:104)

  at
    org.apache.xmlrpc.client.XmlRpcStreamTransport.sendRequest(XmlRpcStreamTransport.java:151)

  at
    org.apache.xmlrpc.client.XmlRpcHttpTransport.sendRequest(XmlRpcHttpTransport.java:143)

  at
    org.apache.xmlrpc.client.XmlRpcSunHttpTransport.sendRequest(XmlRpcSunHttpTransport.java:69)

  at
    org.apache.xmlrpc.client.XmlRpcClientWorker.execute(XmlRpcClientWorker.java:56)

  at
    org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:167)

  at
    org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:158)

  at
    org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:147)

Caused by: java.security.cert.CertificateException: No subject
alternative names present

  at
    sun.security.util.HostnameChecker.matchIP(HostnameChecker.java:145)

  at
    sun.security.util.HostnameChecker.match(HostnameChecker.java:94)

  at
    sun.security.ssl.X509TrustManagerImpl.checkIdentity(X509TrustManagerImpl.java:455)

  at
    sun.security.ssl.X509TrustManagerImpl.checkIdentity(X509TrustManagerImpl.java:436)

  at
    sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:200)

  at
    sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)

  at
    sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1496)

  ... 20 more

I believe I need to somehow specify the use of SSL, but I know very little about networking or the use of Java classes/methods (much less in a MATLAB environment). Any advice?

Answer 1

[Benjamin Sunderland]

Does anyone have any experience using these xmlrpc JARs in MATLAB? I am able to implement this in Python using the built-in xml-rpc client library, but unfortunately I also need to do it in MATLAB. If it helps provide any context for what I'm trying to do, my solution in Python is of the following form:

import ssl
import xmlrpc.client

username    = 'username'
password    = 'password'
ip          = '55.555.55.555'
port        = 8080

context   = ssl._create_unverified_context()
transport = xmlrpc.client.SafeTransport(context=context)
api       = xmlrpc.client.ServerProxy('https://%s:%s@%s:%d/'%( username, password, ip, port ), transport )

Methods = api.list.methods()

Where list.methods() is just one of the rpc functions for the site I'm trying to access. I just don't know how to configure the xmlrpc client the same way in a MATLAB environment using these JARs.

Answer 2

[Feyza Boyun]

fileplace='/location/of/your/jar/files/';
dpath={[fileplace, 'commons-logging-1.1.jar'], ...
       [fileplace, 'ws-commons-util-1.0.2.jar'], ...
       [fileplace, 'xmlrpc-common-3.1.3.jar'], ...
       [fileplace, 'xmlrpc-client-3.1.3.jar'], ...
       [fileplace, 'xmlrpc-server-3.1.3.jar'] ...
      };

javaclasspath(dpath)


% Setting up the client
client = javaObject('org.apache.xmlrpc.client.XmlRpcClient')
config = javaObject('org.apache.xmlrpc.client.XmlRpcClientConfigImpl')
url = javaObject('java.net.URL', 'http://localhost:(9000/')
config.setServerURL(url)
config.setEnabledForExtensions(true);  
config.setConnectionTimeout(60 * 1000);
config.setReplyTimeout(60 * 1000);

client.setConfig(config)

try this, it works for me.