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package sun.security.jgss.wrapper;

import java.util.HashMap;
import java.security.Provider;
import java.security.AccessController;
import java.security.PrivilegedAction;
import org.ietf.jgss.Oid;
import sun.security.action.PutAllAction;

Defines the Sun NativeGSS provider for plugging in the native GSS mechanisms to Java GSS. List of supported mechanisms depends on the local machine configuration.
Author:Yu-Ching Valerie Peng
/** * Defines the Sun NativeGSS provider for plugging in the * native GSS mechanisms to Java GSS. * * List of supported mechanisms depends on the local * machine configuration. * * @author Yu-Ching Valerie Peng */
public final class SunNativeProvider extends Provider { private static final long serialVersionUID = -238911724858694204L; private static final String NAME = "SunNativeGSS"; private static final String INFO = "Sun Native GSS provider"; private static final String MF_CLASS = "sun.security.jgss.wrapper.NativeGSSFactory"; private static final String LIB_PROP = "sun.security.jgss.lib"; private static final String DEBUG_PROP = "sun.security.nativegss.debug"; private static HashMap<String, String> MECH_MAP; static final Provider INSTANCE = new SunNativeProvider(); static boolean DEBUG; static void debug(String message) { if (DEBUG) { if (message == null) { throw new NullPointerException(); } System.out.println(NAME + ": " + message); } } static { MECH_MAP = AccessController.doPrivileged( new PrivilegedAction<HashMap<String, String>>() { public HashMap<String, String> run() { DEBUG = Boolean.parseBoolean (System.getProperty(DEBUG_PROP)); try { System.loadLibrary("j2gss"); } catch (Error err) { debug("No j2gss library found!"); if (DEBUG) err.printStackTrace(); return null; } String gssLibs[] = new String[0]; String defaultLib = System.getProperty(LIB_PROP); if (defaultLib == null || defaultLib.trim().equals("")) { String osname = System.getProperty("os.name"); if (osname.startsWith("SunOS")) { gssLibs = new String[]{ "libgss.so" }; } else if (osname.startsWith("Linux")) { gssLibs = new String[]{ "libgssapi.so", "libgssapi_krb5.so", "libgssapi_krb5.so.2", }; } else if (osname.contains("OS X")) { gssLibs = new String[]{ "libgssapi_krb5.dylib", "/usr/lib/sasl2/libgssapiv2.2.so", }; } } else { gssLibs = new String[]{ defaultLib }; } for (String libName: gssLibs) { if (GSSLibStub.init(libName, DEBUG)) { debug("Loaded GSS library: " + libName); Oid[] mechs = GSSLibStub.indicateMechs(); HashMap<String, String> map = new HashMap<String, String>(); for (int i = 0; i < mechs.length; i++) { debug("Native MF for " + mechs[i]); map.put("GssApiMechanism." + mechs[i], MF_CLASS); } return map; } } return null; } }); } public SunNativeProvider() { /* We are the Sun NativeGSS provider */ super(NAME, 1.8d, INFO); if (MECH_MAP != null) { AccessController.doPrivileged(new PutAllAction(this, MECH_MAP)); } } }