--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/sun/security/rsa/RSAPublicKeyImpl.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2003, 2017, 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.rsa;
+
+import java.io.IOException;
+import java.math.BigInteger;
+
+import java.security.*;
+import java.security.interfaces.*;
+
+import sun.security.util.*;
+import sun.security.x509.X509Key;
+
+/**
+ * Key implementation for RSA public keys.
+ *
+ * Note: RSA keys must be at least 512 bits long
+ *
+ * @see RSAPrivateCrtKeyImpl
+ * @see RSAKeyFactory
+ *
+ * @since   1.5
+ * @author  Andreas Sterbenz
+ */
+public final class RSAPublicKeyImpl extends X509Key implements RSAPublicKey {
+
+    private static final long serialVersionUID = 2644735423591199609L;
+
+    private BigInteger n;       // modulus
+    private BigInteger e;       // public exponent
+
+    /**
+     * Construct a key from its components. Used by the
+     * RSAKeyFactory and the RSAKeyPairGenerator.
+     */
+    public RSAPublicKeyImpl(BigInteger n, BigInteger e)
+            throws InvalidKeyException {
+        this.n = n;
+        this.e = e;
+        RSAKeyFactory.checkRSAProviderKeyLengths(n.bitLength(), e);
+        // generate the encoding
+        algid = RSAPrivateCrtKeyImpl.rsaId;
+        try {
+            DerOutputStream out = new DerOutputStream();
+            out.putInteger(n);
+            out.putInteger(e);
+            byte[] keyArray =
+                new DerValue(DerValue.tag_Sequence,
+                             out.toByteArray()).toByteArray();
+            setKey(new BitArray(keyArray.length*8, keyArray));
+        } catch (IOException exc) {
+            // should never occur
+            throw new InvalidKeyException(exc);
+        }
+    }
+
+    /**
+     * Construct a key from its encoding. Used by RSAKeyFactory.
+     */
+    public RSAPublicKeyImpl(byte[] encoded) throws InvalidKeyException {
+        decode(encoded);
+        RSAKeyFactory.checkRSAProviderKeyLengths(n.bitLength(), e);
+    }
+
+    // see JCA doc
+    public String getAlgorithm() {
+        return "RSA";
+    }
+
+    // see JCA doc
+    public BigInteger getModulus() {
+        return n;
+    }
+
+    // see JCA doc
+    public BigInteger getPublicExponent() {
+        return e;
+    }
+
+    /**
+     * Parse the key. Called by X509Key.
+     */
+    protected void parseKeyBits() throws InvalidKeyException {
+        try {
+            DerInputStream in = new DerInputStream(getKey().toByteArray());
+            DerValue derValue = in.getDerValue();
+            if (derValue.tag != DerValue.tag_Sequence) {
+                throw new IOException("Not a SEQUENCE");
+            }
+            DerInputStream data = derValue.data;
+            n = data.getPositiveBigInteger();
+            e = data.getPositiveBigInteger();
+            if (derValue.data.available() != 0) {
+                throw new IOException("Extra data available");
+            }
+        } catch (IOException e) {
+            throw new InvalidKeyException("Invalid RSA public key", e);
+        }
+    }
+
+    // return a string representation of this key for debugging
+    public String toString() {
+        return "Sun RSA public key, " + n.bitLength() + " bits\n  modulus: "
+                + n + "\n  public exponent: " + e;
+    }
+
+    protected Object writeReplace() throws java.io.ObjectStreamException {
+        return new KeyRep(KeyRep.Type.PUBLIC,
+                        getAlgorithm(),
+                        getFormat(),
+                        getEncoded());
+    }
+}