8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/share/classes/sun/security/util/AbstractAlgorithmConstraints.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.security.util;
+
+import java.security.AccessController;
+import java.security.AlgorithmConstraints;
+import java.security.PrivilegedAction;
+import java.security.Security;
+import java.util.Set;
+
+/**
+ * The class contains common functionality for algorithm constraints classes.
+ */
+public abstract class AbstractAlgorithmConstraints
+        implements AlgorithmConstraints {
+
+    protected final AlgorithmDecomposer decomposer;
+
+    protected AbstractAlgorithmConstraints(AlgorithmDecomposer decomposer) {
+        this.decomposer = decomposer;
+    }
+
+    // Get algorithm constraints from the specified security property.
+    static String[] getAlgorithms(String propertyName) {
+        String property = AccessController.doPrivileged(
+                new PrivilegedAction<String>() {
+                    @Override
+                    public String run() {
+                        return Security.getProperty(propertyName);
+                    }
+                });
+
+        String[] algorithmsInProperty = null;
+        if (property != null && !property.isEmpty()) {
+            // remove double quote marks from beginning/end of the property
+            if (property.length() >= 2 && property.charAt(0) == '"' &&
+                    property.charAt(property.length() - 1) == '"') {
+                property = property.substring(1, property.length() - 1);
+            }
+            algorithmsInProperty = property.split(",");
+            for (int i = 0; i < algorithmsInProperty.length; i++) {
+                algorithmsInProperty[i] = algorithmsInProperty[i].trim();
+            }
+        }
+
+        // map the disabled algorithms
+        if (algorithmsInProperty == null) {
+            algorithmsInProperty = new String[0];
+        }
+        return algorithmsInProperty;
+    }
+
+    static boolean checkAlgorithm(String[] algorithms, String algorithm,
+            AlgorithmDecomposer decomposer) {
+        if (algorithm == null || algorithm.length() == 0) {
+            throw new IllegalArgumentException("No algorithm name specified");
+        }
+
+        Set<String> elements = null;
+        for (String item : algorithms) {
+            if (item == null || item.isEmpty()) {
+                continue;
+            }
+
+            // check the full name
+            if (item.equalsIgnoreCase(algorithm)) {
+                return false;
+            }
+
+            // decompose the algorithm into sub-elements
+            if (elements == null) {
+                elements = decomposer.decompose(algorithm);
+            }
+
+            // check the items of the algorithm
+            for (String element : elements) {
+                if (item.equalsIgnoreCase(element)) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+
+}