Java GSSManager類代碼示例

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
public static void main(String[] args) throws Exception {

        // We don't care about clock difference
        new FileOutputStream("krb5.conf").write(
                "[libdefaults]\nclockskew=999999999".getBytes());
        System.setProperty("java.security.krb5.conf", "krb5.conf");
        Config.refresh();

        Subject subj = new Subject();
        KerberosPrincipal kp = new KerberosPrincipal(princ);
        KerberosKey kk = new KerberosKey(
                kp, key, EncryptedData.ETYPE_AES128_CTS_HMAC_SHA1_96, 0);
        subj.getPrincipals().add(kp);
        subj.getPrivateCredentials().add(kk);

        Subject.doAs(subj, new PrivilegedExceptionAction() {
            public Object run() throws Exception {
                GSSManager man = GSSManager.getInstance();
                GSSContext ctxt = man.createContext(man.createCredential(
                        null, GSSCredential.INDEFINITE_LIFETIME,
                        GSSUtil.GSS_KRB5_MECH_OID, GSSCredential.ACCEPT_ONLY));
                return ctxt.acceptSecContext(token, 0, token.length);
            }
        });
    }
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
/**
 * Starts as a client
 * @param target communication peer
 * @param mech GSS mech
 * @throws java.lang.Exception
 */
public void startAsClient(final String target, final Oid mech) throws Exception {
    doAs(new Action() {
        @Override
        public byte[] run(Context me, byte[] dummy) throws Exception {
            GSSManager m = GSSManager.getInstance();
            me.x = (ExtendedGSSContext)m.createContext(
                      target.indexOf('@') < 0 ?
                        m.createName(target, null) :
                        m.createName(target, GSSName.NT_HOSTBASED_SERVICE),
                    mech,
                    cred,
                    GSSContext.DEFAULT_LIFETIME);
            return null;
        }
    }, null);
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
public static String validateServiceTicket(Subject subject, final byte[] serviceTicket)
    throws GSSException, IllegalAccessException, NoSuchFieldException, ClassNotFoundException,
    PrivilegedActionException {
  // Kerberos version 5 OID
  Oid krb5Oid = KerberosUtils.getOidInstance("GSS_KRB5_MECH_OID");


  // Accept the context and return the client principal name.
  return Subject.doAs(subject, new PrivilegedExceptionAction<String>() {

    @Override
    public String run() throws Exception {
      String clientName = null;
      // Identify the server that communications are being made to.
      GSSManager manager = GSSManager.getInstance();
      GSSContext context = manager.createContext((GSSCredential) null);
      context.acceptSecContext(serviceTicket, 0, serviceTicket.length);
      clientName = context.getSrcName().toString();
      return clientName;
    }
  });
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
static void xRealmAuth() throws Exception {
    Security.setProperty("auth.login.defaultCallbackHandler", "CrossRealm");
    System.setProperty("java.security.auth.login.config", "jaas-localkdc.conf");
    System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");
    FileOutputStream fos = new FileOutputStream("jaas-localkdc.conf");
    fos.write(("com.sun.security.jgss.krb5.initiate {\n" +
            "    com.sun.security.auth.module.Krb5LoginModule\n" +
            "    required\n" +
            "    principal=dummy\n" +
            "    doNotPrompt=false\n" +
            "    useTicketCache=false\n" +
            "    ;\n" +
            "};").getBytes());
    fos.close();

    GSSManager m = GSSManager.getInstance();
    m.createContext(
            m.createName("[email protected]", GSSName.NT_HOSTBASED_SERVICE),
            GSSUtil.GSS_KRB5_MECH_OID,
            null,
            GSSContext.DEFAULT_LIFETIME).initSecContext(new byte[0], 0, 0);
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
public static void main(String[] args) throws Exception {
    GSSCredential cred = null;
    GSSContext ctx = GSSManager.getInstance().createContext(cred);

    String var =
        /*0000*/ "60 1C 06 06 2B 06 01 05 05 02 A0 12 30 10 A0 0E " +
        /*0010*/ "30 0C 06 0A 2B 06 01 04 01 82 37 02 02 0A ";
    byte[] token = new byte[var.length()/3];
    for (int i=0; i<token.length; i++) {
        token[i] = Integer.valueOf(var.substring(3*i,3*i+2), 16).byteValue();
    }
    try {
        ctx.acceptSecContext(token, 0, token.length);
    } catch (GSSException gsse) {
        System.out.println("Expected exception: " + gsse);
    }
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
/**
 * Starts as a server with the specified service name
 * @param name the service name
 * @param mech GSS mech
 * @throws java.lang.Exception
 */
public void startAsServer(final String name, final Oid mech, final boolean asInitiator) throws Exception {
    doAs(new Action() {
        @Override
        public byte[] run(Context me, byte[] dummy) throws Exception {
            GSSManager m = GSSManager.getInstance();
            me.cred = m.createCredential(
                    name == null ? null :
                      (name.indexOf('@') < 0 ?
                        m.createName(name, null) :
                        m.createName(name, GSSName.NT_HOSTBASED_SERVICE)),
                    GSSCredential.INDEFINITE_LIFETIME,
                    mech,
                    asInitiator?
                            GSSCredential.INITIATE_AND_ACCEPT:
                            GSSCredential.ACCEPT_ONLY);
            me.x = (ExtendedGSSContext)m.createContext(me.cred);
            return null;
        }
    }, null);
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
protected byte[] generateGSSToken(
                                   final byte[] input,
                                   final Oid oid ) throws GSSException {

    byte[] token = input;
    if (token == null) {
        token = new byte[0];
    }
    GSSManager manager = getManager();

    GSSName serverName = manager.createName(servicePrincipalName, servicePrincipalOid);

    GSSContext gssContext = manager.createContext(serverName.canonicalize(oid),
                                                  oid,
                                                  null,
                                                  GSSContext.DEFAULT_LIFETIME);
    gssContext.requestMutualAuth(true);
    gssContext.requestCredDeleg(true);
    // Get client to login if not already done
    return gssClient.negotiate(gssContext, token);
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
public static void main(String[] args) throws Exception {
    new OneKDC(null).writeJAASConf();
    System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");

    GSSManager gm = GSSManager.getInstance();
    GSSCredential cred = gm.createCredential(GSSCredential.INITIATE_AND_ACCEPT);
    int time = cred.getRemainingLifetime();
    int time2 = cred.getRemainingInitLifetime(null);
    // The test KDC issues a TGT with a default lifetime of 11 hours
    int elevenhrs = 11*3600;
    if (time > elevenhrs+60 || time < elevenhrs-60) {
        throw new Exception("getRemainingLifetime returns wrong value.");
    }
    if (time2 > elevenhrs+60 || time2 < elevenhrs-60) {
        throw new Exception("getRemainingInitLifetime returns wrong value.");
    }
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
public static void main(String[] args) throws Exception {
    new OneKDC(null).writeJAASConf();
    System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");

    GSSManager gm = GSSManager.getInstance();
    GSSCredential cred = gm.createCredential(GSSCredential.INITIATE_AND_ACCEPT);
    int time = cred.getRemainingLifetime();
    int time2 = cred.getRemainingInitLifetime(null);
    // The test KDC issues a TGT with a default lifetime of 11 hours
    int elevenhrs = KDC.DEFAULT_LIFETIME;
    if (time > elevenhrs+60 || time < elevenhrs-60) {
        throw new Exception("getRemainingLifetime returns wrong value.");
    }
    if (time2 > elevenhrs+60 || time2 < elevenhrs-60) {
        throw new Exception("getRemainingInitLifetime returns wrong value.");
    }
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
/**
 * Starts as a client
 * @param target communication peer
 * @param mech GSS mech
 * @throws java.lang.Exception
 */
public void startAsClient(final String target, final Oid mech) throws Exception {
    doAs(new Action() {
        @Override
        public byte[] run(Context me, byte[] dummy) throws Exception {
            GSSManager m = GSSManager.getInstance();
            me.x = m.createContext(
                      target.indexOf('@') < 0 ?
                        m.createName(target, null) :
                        m.createName(target, GSSName.NT_HOSTBASED_SERVICE),
                    mech,
                    cred,
                    GSSContext.DEFAULT_LIFETIME);
            return null;
        }
    }, null);
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
/**
 * Starts as a server with the specified service name
 * @param name the service name
 * @param mech GSS mech
 * @throws java.lang.Exception
 */
public void startAsServer(final String name, final Oid mech, final boolean asInitiator) throws Exception {
    doAs(new Action() {
        @Override
        public byte[] run(Context me, byte[] dummy) throws Exception {
            GSSManager m = GSSManager.getInstance();
            me.cred = m.createCredential(
                    name == null ? null :
                      (name.indexOf('@') < 0 ?
                        m.createName(name, null) :
                        m.createName(name, GSSName.NT_HOSTBASED_SERVICE)),
                    GSSCredential.INDEFINITE_LIFETIME,
                    mech,
                    asInitiator?
                            GSSCredential.INITIATE_AND_ACCEPT:
                            GSSCredential.ACCEPT_ONLY);
            me.x = m.createContext(me.cred);
            return null;
        }
    }, null);
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
/**
 * @since 4.4
 */
protected byte[] generateGSSToken(
        final byte[] input, final Oid oid, final String authServer,
        final Credentials credentials) throws GSSException {
    byte[] inputBuff = input;
    if (inputBuff == null) {
        inputBuff = new byte[0];
    }
    final GSSManager manager = getManager();
    final GSSName serverName = manager.createName(service + "@" + authServer, GSSName.NT_HOSTBASED_SERVICE);

    final GSSCredential gssCredential;
    if (credentials instanceof KerberosCredentials) {
        gssCredential = ((KerberosCredentials) credentials).getGSSCredential();
    } else {
        gssCredential = null;
    }

    final GSSContext gssContext = manager.createContext(
            serverName.canonicalize(oid), oid, gssCredential, GSSContext.DEFAULT_LIFETIME);
    gssContext.requestMutualAuth(true);
    gssContext.requestCredDeleg(true);
    return gssContext.initSecContext(inputBuff, 0, inputBuff.length);
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
private String acceptSecurityContext( final byte[] serviceTicket)
    throws GSSException {
  krb5Oid = new Oid( "1.2.840.113554.1.2.2");

  // Accept the context and return the client principal name.
  return Subject.doAs( subject, new PrivilegedAction<String>() {
    public String run() {
      try {
        // Identify the server that communications are being made to.
        GSSManager manager = GSSManager.getInstance();
        GSSContext context = manager.createContext( (GSSCredential) null);
        context.acceptSecContext( serviceTicket, 0, serviceTicket.length);
        return context.getSrcName().toString();
      }
      catch ( Exception e) {
        e.printStackTrace();
        return null;
      }
    }
  });
}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
private void initiateSecurityContext( String servicePrincipalName)
    throws GSSException {
  GSSManager manager = GSSManager.getInstance();
  GSSName serverName = manager.createName( servicePrincipalName,
      GSSName.NT_HOSTBASED_SERVICE);
  final GSSContext context = manager.createContext( serverName, krb5Oid, null,
      GSSContext.DEFAULT_LIFETIME);
  // The GSS context initiation has to be performed as a privileged action.
  this.serviceTicket = Subject.doAs( subject, new PrivilegedAction<byte[]>() {
    public byte[] run() {
      try {
        byte[] token = new byte[0];
        // This is a one pass context initialisation.
        context.requestMutualAuth( false);
        context.requestCredDeleg( false);
        return context.initSecContext( token, 0, token.length);
      }
      catch ( GSSException e) {
        e.printStackTrace();
        return null;
      }
    }
  });

}
 

import org.ietf.jgss.GSSManager; //導入依賴的package包/類
GSSContext initGSS() throws Exception {
    final GSSManager MANAGER = GSSManager.getInstance();

    final PrivilegedExceptionAction<GSSCredential> action = new PrivilegedExceptionAction<GSSCredential>() {
        @Override
        public GSSCredential run() throws GSSException {
            return MANAGER.createCredential(null, GSSCredential.DEFAULT_LIFETIME, KrbConstants.SPNEGO, GSSCredential.INITIATE_ONLY);
        }
    };

    final GSSCredential clientcreds = Subject.doAs(initiatorSubject, action);

    final GSSContext context = MANAGER.createContext(MANAGER.createName(acceptorPrincipal, GSSName.NT_USER_NAME, KrbConstants.SPNEGO),
            KrbConstants.SPNEGO, clientcreds, GSSContext.DEFAULT_LIFETIME);

    //TODO make configurable
    context.requestMutualAuth(true);
    context.requestConf(true);
    context.requestInteg(true);
    context.requestReplayDet(true);
    context.requestSequenceDet(true);
    context.requestCredDeleg(false);

    return context;
}