SPNEGO support

[lgpl/argeo-commons.git] / org.argeo.cms / src / org / argeo / cms / internal / http / client / SpnegoAuthScheme.java

diff --git a/org.argeo.cms/src/org/argeo/cms/internal/http/client/SpnegoAuthScheme.java b/org.argeo.cms/src/org/argeo/cms/internal/http/client/SpnegoAuthScheme.java
new file mode 100644 (file)
index 0000000..7d5278e
--- /dev/null
+++ b/org.argeo.cms/src/org/argeo/cms/internal/http/client/SpnegoAuthScheme.java
@@ -0,0 +1,166 @@
+package org.argeo.cms.internal.http.client;
+
+import java.net.URL;
+import java.security.PrivilegedExceptionAction;
+import java.util.ArrayList;
+import java.util.Base64;
+
+import javax.security.auth.Subject;
+import javax.security.auth.login.LoginContext;
+
+import org.apache.commons.httpclient.Credentials;
+import org.apache.commons.httpclient.HttpClient;
+import org.apache.commons.httpclient.HttpMethod;
+import org.apache.commons.httpclient.URIException;
+import org.apache.commons.httpclient.auth.AuthPolicy;
+import org.apache.commons.httpclient.auth.AuthScheme;
+import org.apache.commons.httpclient.auth.AuthenticationException;
+import org.apache.commons.httpclient.auth.CredentialsProvider;
+import org.apache.commons.httpclient.auth.MalformedChallengeException;
+import org.apache.commons.httpclient.methods.GetMethod;
+import org.apache.commons.httpclient.params.DefaultHttpParams;
+import org.apache.commons.httpclient.params.HttpParams;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.ietf.jgss.GSSContext;
+import org.ietf.jgss.GSSException;
+import org.ietf.jgss.GSSManager;
+import org.ietf.jgss.GSSName;
+import org.ietf.jgss.Oid;
+
+/** Implementation of the SPNEGO auth scheme. */
+public class SpnegoAuthScheme implements AuthScheme {
+       private final static Log log = LogFactory.getLog(SpnegoAuthScheme.class);
+
+       public static final String NAME = "Negotiate";
+       private final static Oid KERBEROS_OID;
+       static {
+               try {
+                       KERBEROS_OID = new Oid("1.3.6.1.5.5.2");
+               } catch (GSSException e) {
+                       throw new IllegalStateException("Cannot create Kerberos OID", e);
+               }
+       }
+
+       private boolean complete = false;
+       private String realm;
+
+       @Override
+       public void processChallenge(String challenge) throws MalformedChallengeException {
+               log.debug("processChallenge " + challenge);
+
+       }
+
+       @Override
+       public String getSchemeName() {
+               return NAME;
+       }
+
+       @Override
+       public String getParameter(String name) {
+               log.debug("getParameter " + name);
+               return null;
+       }
+
+       @Override
+       public String getRealm() {
+               return realm;
+       }
+
+       @Override
+       public String getID() {
+               return NAME;
+       }
+
+       @Override
+       public boolean isConnectionBased() {
+               return true;
+       }
+
+       @Override
+       public boolean isComplete() {
+               log.debug("isComplete");
+               return complete;
+       }
+
+       @Override
+       public String authenticate(Credentials credentials, String method, String uri) throws AuthenticationException {
+               log.debug("authenticate " + method + " " + uri);
+               return null;
+       }
+
+       @Override
+       public String authenticate(Credentials credentials, HttpMethod method) throws AuthenticationException {
+               log.debug("authenticate " + method);
+               GSSContext context = null;
+               String tokenStr = null;
+               String hostname;
+               try {
+                       hostname = method.getURI().getHost();
+               } catch (URIException e1) {
+                       throw new IllegalStateException("Cannot authenticate", e1);
+               }
+               String serverPrinc = "HTTP@" + hostname;
+
+               try {
+                       // Get service's principal name
+                       GSSManager manager = GSSManager.getInstance();
+                       GSSName serverName = manager.createName(serverPrinc, GSSName.NT_HOSTBASED_SERVICE, KERBEROS_OID);
+
+                       // Get the context for authentication
+                       context = manager.createContext(serverName, KERBEROS_OID, null, GSSContext.DEFAULT_LIFETIME);
+                       // context.requestMutualAuth(true); // Request mutual authentication
+                       // context.requestConf(true); // Request confidentiality
+                       context.requestCredDeleg(true);
+
+                       byte[] token = new byte[0];
+
+                       // token is ignored on the first call
+                       token = context.initSecContext(token, 0, token.length);
+
+                       // Send a token to the server if one was generated by
+                       // initSecContext
+                       if (token != null) {
+                               tokenStr = Base64.getEncoder().encodeToString(token);
+                               // complete=true;
+                       }
+                       return "Negotiate " + tokenStr;
+               } catch (GSSException e) {
+                       throw new AuthenticationException("Cannot authenticate to " + serverPrinc, e);
+               }
+       }
+
+       public static void main(String[] args) {
+               if (args.length == 0) {
+                       System.err.println("usage: java " + SpnegoAuthScheme.class.getName() + " <url>");
+                       System.exit(1);
+                       return;
+               }
+               String url = args[0];
+
+               URL jaasUrl = SpnegoAuthScheme.class.getResource("jaas.cfg");
+               System.setProperty("java.security.auth.login.config", jaasUrl.toExternalForm());
+               try {
+                       LoginContext lc = new LoginContext("SINGLE_USER");
+                       lc.login();
+
+                       AuthPolicy.registerAuthScheme(SpnegoAuthScheme.NAME, SpnegoAuthScheme.class);
+                       HttpParams params = DefaultHttpParams.getDefaultParams();
+                       ArrayList<String> schemes = new ArrayList<>();
+                       schemes.add(SpnegoAuthScheme.NAME);
+                       params.setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, schemes);
+                       params.setParameter(CredentialsProvider.PROVIDER, new SpnegoCredentialProvider());
+
+                       int responseCode = Subject.doAs(lc.getSubject(), new PrivilegedExceptionAction<Integer>() {
+                               public Integer run() throws Exception {
+                                       HttpClient httpClient = new HttpClient();
+                                       return httpClient.executeMethod(new GetMethod(url));
+                               }
+                       });
+                       System.out.println("Reponse code: " + responseCode);
+               } catch (Exception e) {
+                       e.printStackTrace();
+               }
+       }
+
+}