source: java/GraphTest.java

import java.io.*;
import java.util.*;

import edu.uci.ics.jung.graph.*;

import net.deterlab.abac.Credential;
import net.deterlab.abac.CredentialFactory;
import net.deterlab.abac.Context;
import net.deterlab.abac.Role;
import net.deterlab.abac.Identity;

import java.security.KeyPair;


/**
 * Simple test of the native Java implementation of ABAC. Loads credentials
 * from an rt0 file and runs a query against them.
 */
public class GraphTest {
    public static void main(String[] args) throws IOException {
        File saveDir = new File(".");
        if (args.length < 3) {
            System.out.println("Usage: GraphTest <files> <role> <principal>");
            System.out.println("    runs the query role <-?- principal "
                    + "and prints the result");
            System.exit(1);
        }

        Context ctxt = new Context();
        Map<String, Exception> errs = new HashMap<String, Exception>();

        for (int i= 0; i < args.length-2; i++) {
            File f = new File(args[i]);

            try {
                if (f.isDirectory()) {
                    ctxt.load_directory(f, errs);
                    saveDir = f;
                }
                else if (f.getPath().endsWith(".pem")) 
                    ctxt.load_id_file(f);
                else if (f.getPath().endsWith(".der"))
                    ctxt.load_attribute_file(f);
                else if (f.getPath().endsWith(".zip"))
                    ctxt.load_zip(f, errs);
                else if (f.getPath().endsWith(".rt0"))
                    ctxt.load_rt0(f);
                else
                    System.out.println(f + " of unknown type");
            }
            catch (Exception e) {
                System.err.println("Failed to process " + f + ": " +e);
            }
        }

        if (errs.keySet().size() > 0) System.err.println("Errors");
        for (String f: errs.keySet()) System.err.println(f + " " + errs.get(f));

        System.out.println("All read credentials");
        for (Credential c: ctxt.credentials() ) 
            System.out.println(c.simpleString(ctxt) + " " + c.expiration());
        System.out.println("End of read credentials");

        //
        // run the query
        //

        Role role = new Role(args[args.length-2], ctxt);
        Role prin = new Role(args[args.length-1], ctxt);
        Context.QueryResult ret = ctxt.query(role.toString(), prin.toString());
        Set<Identity> ids = new TreeSet<Identity>();

        String fn = "attr";
        int n = 0;
        String suf = ".der";
        System.out.println("Result: " + ret.getSuccess());
        System.out.println("Proof");
        for (Credential c : ret.getCredentials()) {
            System.out.println(c.simpleString(ctxt));
            if ( c.hasCertificate()) {
                c.write(new File(saveDir, fn + n++ + suf).toString());
                ids.add(c.issuer());
            }
        }

        fn = "id";
        n = 0;
        suf = ".pem";
        System.out.println("Identities");
        for (Identity i: ids) {
            System.out.println("ID: " + i);
            i.write(new File(saveDir, fn + n++ + suf).toString());
        }
        try {
            ctxt.write_zip(new File(saveDir, "testout.zip"), true, true);
        }
        catch (IOException ioe) {
            System.err.println("Could not write ZIP: " + ioe);
        }
        System.out.println("rt0 with keyids");
        ctxt.write_rt0(new OutputStreamWriter(System.out), true);
    }
}