--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/com/sun/security/sasl/util/PolicyUtils.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2000-2003 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package com.sun.security.sasl.util;
+
+import javax.security.sasl.Sasl;
+import java.util.Map;
+
+/**
+ * Static class that contains utilities for dealing with Java SASL
+ * security policy-related properties.
+ *
+ * @author Rosanna Lee
+ */
+final public class PolicyUtils {
+    // Can't create one of these
+    private PolicyUtils() {
+    }
+
+    public final static int NOPLAINTEXT = 0x0001;
+    public final static int NOACTIVE = 0x0002;
+    public final static int NODICTIONARY = 0x0004;
+    public final static int FORWARD_SECRECY = 0x0008;
+    public final static int NOANONYMOUS = 0x0010;
+    public final static int PASS_CREDENTIALS = 0x0200;
+
+    /**
+     * Determines whether a mechanism's characteristics, as defined in flags,
+     * fits the security policy properties found in props.
+     * @param flags The mechanism's security characteristics
+     * @param props The security policy properties to check
+     * @return true if passes; false if fails
+     */
+    public static boolean checkPolicy(int flags, Map props) {
+        if (props == null) {
+            return true;
+        }
+
+        if ("true".equalsIgnoreCase((String)props.get(Sasl.POLICY_NOPLAINTEXT))
+            && (flags&NOPLAINTEXT) == 0) {
+            return false;
+        }
+        if ("true".equalsIgnoreCase((String)props.get(Sasl.POLICY_NOACTIVE))
+            && (flags&NOACTIVE) == 0) {
+            return false;
+        }
+        if ("true".equalsIgnoreCase((String)props.get(Sasl.POLICY_NODICTIONARY))
+            && (flags&NODICTIONARY) == 0) {
+            return false;
+        }
+        if ("true".equalsIgnoreCase((String)props.get(Sasl.POLICY_NOANONYMOUS))
+            && (flags&NOANONYMOUS) == 0) {
+            return false;
+        }
+        if ("true".equalsIgnoreCase((String)props.get(Sasl.POLICY_FORWARD_SECRECY))
+            && (flags&FORWARD_SECRECY) == 0) {
+            return false;
+        }
+        if ("true".equalsIgnoreCase((String)props.get(Sasl.POLICY_PASS_CREDENTIALS))
+            && (flags&PASS_CREDENTIALS) == 0) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Given a list of mechanisms and their characteristics, select the
+     * subset that conforms to the policies defined in props.
+     * Useful for SaslXXXFactory.getMechanismNames(props) implementations.
+     *
+     */
+    public static String[] filterMechs(String[] mechs, int[] policies,
+        Map props) {
+        if (props == null) {
+            return mechs.clone();
+        }
+
+        boolean[] passed = new boolean[mechs.length];
+        int count = 0;
+        for (int i = 0; i< mechs.length; i++) {
+            if (passed[i] = checkPolicy(policies[i], props)) {
+                ++count;
+            }
+        }
+        String[] answer = new String[count];
+        for (int i = 0, j=0; i< mechs.length; i++) {
+            if (passed[i]) {
+                answer[j++] = mechs[i];
+            }
+        }
+
+        return answer;
+    }
+}