| /* |
| * Copyright (c) 2005, 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.mscapi; |
| |
| import java.math.BigInteger; |
| import java.security.KeyException; |
| import java.security.KeyRep; |
| import java.security.ProviderException; |
| |
| import sun.security.rsa.RSAPublicKeyImpl; |
| |
| /** |
| * The handle for an RSA public key using the Microsoft Crypto API. |
| * |
| * @since 1.6 |
| */ |
| class RSAPublicKey extends Key implements java.security.interfaces.RSAPublicKey |
| { |
| private static final long serialVersionUID = -2289561342425825391L; |
| |
| private byte[] publicKeyBlob = null; |
| private byte[] encoding = null; |
| private BigInteger modulus = null; |
| private BigInteger exponent = null; |
| |
| /** |
| * Construct an RSAPublicKey object. |
| */ |
| RSAPublicKey(long hCryptProv, long hCryptKey, int keyLength) |
| { |
| super(hCryptProv, hCryptKey, keyLength); |
| } |
| |
| /** |
| * Returns the standard algorithm name for this key. For |
| * example, "RSA" would indicate that this key is a RSA key. |
| * See Appendix A in the <a href= |
| * "../../../guide/security/CryptoSpec.html#AppA"> |
| * Java Cryptography Architecture API Specification & Reference </a> |
| * for information about standard algorithm names. |
| * |
| * @return the name of the algorithm associated with this key. |
| */ |
| public String getAlgorithm() |
| { |
| return "RSA"; |
| } |
| |
| /** |
| * Returns a printable description of the key. |
| */ |
| public String toString() |
| { |
| StringBuffer sb = new StringBuffer(); |
| |
| sb.append("RSAPublicKey [size=").append(keyLength) |
| .append(" bits, type=").append(getKeyType(hCryptKey)) |
| .append(", container=").append(getContainerName(hCryptProv)) |
| .append("]\n modulus: ").append(getModulus()) |
| .append("\n public exponent: ").append(getPublicExponent()); |
| |
| return sb.toString(); |
| } |
| |
| /** |
| * Returns the public exponent. |
| */ |
| public BigInteger getPublicExponent() { |
| |
| if (exponent == null) { |
| |
| try { |
| publicKeyBlob = getPublicKeyBlob(hCryptKey); |
| exponent = new BigInteger(1, getExponent(publicKeyBlob)); |
| |
| } catch (KeyException e) { |
| throw new ProviderException(e); |
| } |
| } |
| |
| return exponent; |
| } |
| |
| /** |
| * Returns the modulus. |
| */ |
| public BigInteger getModulus() { |
| |
| if (modulus == null) { |
| |
| try { |
| publicKeyBlob = getPublicKeyBlob(hCryptKey); |
| modulus = new BigInteger(1, getModulus(publicKeyBlob)); |
| |
| } catch (KeyException e) { |
| throw new ProviderException(e); |
| } |
| } |
| |
| return modulus; |
| } |
| |
| /** |
| * Returns the name of the primary encoding format of this key, |
| * or null if this key does not support encoding. |
| * The primary encoding format is |
| * named in terms of the appropriate ASN.1 data format, if an |
| * ASN.1 specification for this key exists. |
| * For example, the name of the ASN.1 data format for public |
| * keys is <I>SubjectPublicKeyInfo</I>, as |
| * defined by the X.509 standard; in this case, the returned format is |
| * <code>"X.509"</code>. Similarly, |
| * the name of the ASN.1 data format for private keys is |
| * <I>PrivateKeyInfo</I>, |
| * as defined by the PKCS #8 standard; in this case, the returned format is |
| * <code>"PKCS#8"</code>. |
| * |
| * @return the primary encoding format of the key. |
| */ |
| public String getFormat() |
| { |
| return "X.509"; |
| } |
| |
| /** |
| * Returns the key in its primary encoding format, or null |
| * if this key does not support encoding. |
| * |
| * @return the encoded key, or null if the key does not support |
| * encoding. |
| */ |
| public byte[] getEncoded() |
| { |
| if (encoding == null) { |
| |
| try { |
| encoding = new RSAPublicKeyImpl(getModulus(), |
| getPublicExponent()).getEncoded(); |
| |
| } catch (KeyException e) { |
| // ignore |
| } |
| } |
| return encoding; |
| } |
| |
| protected Object writeReplace() throws java.io.ObjectStreamException { |
| return new KeyRep(KeyRep.Type.PUBLIC, |
| getAlgorithm(), |
| getFormat(), |
| getEncoded()); |
| } |
| |
| /* |
| * Returns the Microsoft CryptoAPI representation of the key. |
| */ |
| private native byte[] getPublicKeyBlob(long hCryptKey) throws KeyException; |
| |
| /* |
| * Returns the key's public exponent (in big-endian 2's complement format). |
| */ |
| private native byte[] getExponent(byte[] keyBlob) throws KeyException; |
| |
| /* |
| * Returns the key's modulus (in big-endian 2's complement format). |
| */ |
| private native byte[] getModulus(byte[] keyBlob) throws KeyException; |
| } |