--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/misc/BASE64Encoder.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,112 @@
+/*
+ * Copyright 1995-1997 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 sun.misc;
+
+import java.io.OutputStream;
+import java.io.InputStream;
+import java.io.PrintStream;
+import java.io.IOException;
+
+/**
+ * This class implements a BASE64 Character encoder as specified in RFC1521.
+ * This RFC is part of the MIME specification as published by the Internet
+ * Engineering Task Force (IETF). Unlike some other encoding schemes there
+ * is nothing in this encoding that indicates
+ * where a buffer starts or ends.
+ *
+ * This means that the encoded text will simply start with the first line
+ * of encoded text and end with the last line of encoded text.
+ *
+ * @author      Chuck McManis
+ * @see         CharacterEncoder
+ * @see         BASE64Decoder
+ */
+
+public class BASE64Encoder extends CharacterEncoder {
+
+    /** this class encodes three bytes per atom. */
+    protected int bytesPerAtom() {
+        return (3);
+    }
+
+    /**
+     * this class encodes 57 bytes per line. This results in a maximum
+     * of 57/3 * 4 or 76 characters per output line. Not counting the
+     * line termination.
+     */
+    protected int bytesPerLine() {
+        return (57);
+    }
+
+    /** This array maps the characters to their 6 bit values */
+    private final static char pem_array[] = {
+        //       0   1   2   3   4   5   6   7
+                'A','B','C','D','E','F','G','H', // 0
+                'I','J','K','L','M','N','O','P', // 1
+                'Q','R','S','T','U','V','W','X', // 2
+                'Y','Z','a','b','c','d','e','f', // 3
+                'g','h','i','j','k','l','m','n', // 4
+                'o','p','q','r','s','t','u','v', // 5
+                'w','x','y','z','0','1','2','3', // 6
+                '4','5','6','7','8','9','+','/'  // 7
+        };
+
+    /**
+     * encodeAtom - Take three bytes of input and encode it as 4
+     * printable characters. Note that if the length in len is less
+     * than three is encodes either one or two '=' signs to indicate
+     * padding characters.
+     */
+    protected void encodeAtom(OutputStream outStream, byte data[], int offset, int len)
+        throws IOException {
+        byte a, b, c;
+
+        if (len == 1) {
+            a = data[offset];
+            b = 0;
+            c = 0;
+            outStream.write(pem_array[(a >>> 2) & 0x3F]);
+            outStream.write(pem_array[((a << 4) & 0x30) + ((b >>> 4) & 0xf)]);
+            outStream.write('=');
+            outStream.write('=');
+        } else if (len == 2) {
+            a = data[offset];
+            b = data[offset+1];
+            c = 0;
+            outStream.write(pem_array[(a >>> 2) & 0x3F]);
+            outStream.write(pem_array[((a << 4) & 0x30) + ((b >>> 4) & 0xf)]);
+            outStream.write(pem_array[((b << 2) & 0x3c) + ((c >>> 6) & 0x3)]);
+            outStream.write('=');
+        } else {
+            a = data[offset];
+            b = data[offset+1];
+            c = data[offset+2];
+            outStream.write(pem_array[(a >>> 2) & 0x3F]);
+            outStream.write(pem_array[((a << 4) & 0x30) + ((b >>> 4) & 0xf)]);
+            outStream.write(pem_array[((b << 2) & 0x3c) + ((c >>> 6) & 0x3)]);
+            outStream.write(pem_array[c & 0x3F]);
+        }
+    }
+}