8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

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

@@ -0,0 +1,161 @@
+/*
+ * Copyright (c) 2003, 2011, 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.io.*;
+import java.nio.*;
+import java.nio.charset.*;
+import java.util.Arrays;
+import jdk.internal.misc.SharedSecrets;
+
+/**
+ * A utility class for reading passwords
+ *
+ */
+public class Password {
+    /** Reads user password from given input stream. */
+    public static char[] readPassword(InputStream in) throws IOException {
+        return readPassword(in, false);
+    }
+
+    /** Reads user password from given input stream.
+     * @param isEchoOn true if the password should be echoed on the screen
+     */
+    @SuppressWarnings("fallthrough")
+    public static char[] readPassword(InputStream in, boolean isEchoOn)
+            throws IOException {
+
+        char[] consoleEntered = null;
+        byte[] consoleBytes = null;
+
+        try {
+            // Use the new java.io.Console class
+            Console con = null;
+            if (!isEchoOn && in == System.in && ((con = System.console()) != null)) {
+                consoleEntered = con.readPassword();
+                // readPassword returns "" if you just print ENTER,
+                // to be compatible with old Password class, change to null
+                if (consoleEntered != null && consoleEntered.length == 0) {
+                    return null;
+                }
+                consoleBytes = convertToBytes(consoleEntered);
+                in = new ByteArrayInputStream(consoleBytes);
+            }
+
+            // Rest of the lines still necessary for KeyStoreLoginModule
+            // and when there is no console.
+
+            char[] lineBuffer;
+            char[] buf;
+            int i;
+
+            buf = lineBuffer = new char[128];
+
+            int room = buf.length;
+            int offset = 0;
+            int c;
+
+            boolean done = false;
+            while (!done) {
+                switch (c = in.read()) {
+                  case -1:
+                  case '\n':
+                      done = true;
+                      break;
+
+                  case '\r':
+                    int c2 = in.read();
+                    if ((c2 != '\n') && (c2 != -1)) {
+                        if (!(in instanceof PushbackInputStream)) {
+                            in = new PushbackInputStream(in);
+                        }
+                        ((PushbackInputStream)in).unread(c2);
+                    } else {
+                        done = true;
+                        break;
+                    }
+                    /* fall through */
+                  default:
+                    if (--room < 0) {
+                        buf = new char[offset + 128];
+                        room = buf.length - offset - 1;
+                        System.arraycopy(lineBuffer, 0, buf, 0, offset);
+                        Arrays.fill(lineBuffer, ' ');
+                        lineBuffer = buf;
+                    }
+                    buf[offset++] = (char) c;
+                    break;
+                }
+            }
+
+            if (offset == 0) {
+                return null;
+            }
+
+            char[] ret = new char[offset];
+            System.arraycopy(buf, 0, ret, 0, offset);
+            Arrays.fill(buf, ' ');
+
+            return ret;
+        } finally {
+            if (consoleEntered != null) {
+                Arrays.fill(consoleEntered, ' ');
+            }
+            if (consoleBytes != null) {
+                Arrays.fill(consoleBytes, (byte)0);
+            }
+        }
+    }
+
+    /**
+     * Change a password read from Console.readPassword() into
+     * its original bytes.
+     *
+     * @param pass a char[]
+     * @return its byte[] format, similar to new String(pass).getBytes()
+     */
+    private static byte[] convertToBytes(char[] pass) {
+        if (enc == null) {
+            synchronized (Password.class) {
+                enc = SharedSecrets.getJavaIOAccess()
+                        .charset()
+                        .newEncoder()
+                        .onMalformedInput(CodingErrorAction.REPLACE)
+                        .onUnmappableCharacter(CodingErrorAction.REPLACE);
+            }
+        }
+        byte[] ba = new byte[(int)(enc.maxBytesPerChar() * pass.length)];
+        ByteBuffer bb = ByteBuffer.wrap(ba);
+        synchronized (enc) {
+            enc.reset().encode(CharBuffer.wrap(pass), bb, true);
+        }
+        if (bb.position() < ba.length) {
+            ba[bb.position()] = '\n';
+        }
+        return ba;
+    }
+    private static volatile CharsetEncoder enc;
+}