| /* |
| * Copyright 2003 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.security.rsa; |
| |
| import java.io.IOException; |
| import java.math.BigInteger; |
| |
| import java.security.*; |
| import java.security.interfaces.*; |
| |
| import sun.security.util.*; |
| import sun.security.pkcs.PKCS8Key; |
| |
| /** |
| * Key implementation for RSA private keys, non-CRT form (modulus, private |
| * exponent only). For CRT private keys, see RSAPrivateCrtKeyImpl. We need |
| * separate classes to ensure correct behavior in instanceof checks, etc. |
| * |
| * Note: RSA keys must be at least 512 bits long |
| * |
| * @see RSAPrivateCrtKeyImpl |
| * @see RSAKeyFactory |
| * |
| * @since 1.5 |
| * @author Andreas Sterbenz |
| */ |
| public final class RSAPrivateKeyImpl extends PKCS8Key implements RSAPrivateKey { |
| |
| private static final long serialVersionUID = -33106691987952810L; |
| |
| private final BigInteger n; // modulus |
| private final BigInteger d; // private exponent |
| |
| /** |
| * Construct a key from its components. Used by the |
| * RSAKeyFactory and the RSAKeyPairGenerator. |
| */ |
| RSAPrivateKeyImpl(BigInteger n, BigInteger d) throws InvalidKeyException { |
| this.n = n; |
| this.d = d; |
| RSAKeyFactory.checkKeyLength(n); |
| // generate the encoding |
| algid = RSAPrivateCrtKeyImpl.rsaId; |
| try { |
| DerOutputStream out = new DerOutputStream(); |
| out.putInteger(0); // version must be 0 |
| out.putInteger(n); |
| out.putInteger(0); |
| out.putInteger(d); |
| out.putInteger(0); |
| out.putInteger(0); |
| out.putInteger(0); |
| out.putInteger(0); |
| out.putInteger(0); |
| DerValue val = |
| new DerValue(DerValue.tag_Sequence, out.toByteArray()); |
| key = val.toByteArray(); |
| } catch (IOException exc) { |
| // should never occur |
| throw new InvalidKeyException(exc); |
| } |
| } |
| |
| // see JCA doc |
| public String getAlgorithm() { |
| return "RSA"; |
| } |
| |
| // see JCA doc |
| public BigInteger getModulus() { |
| return n; |
| } |
| |
| // see JCA doc |
| public BigInteger getPrivateExponent() { |
| return d; |
| } |
| |
| // return a string representation of this key for debugging |
| public String toString() { |
| return "Sun RSA private key, " + n.bitLength() + " bits\n modulus: " |
| + n + "\n private exponent: " + d; |
| } |
| |
| } |