| /* GnuRSAPrivateKey.java -- GNU RSA private key. |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.security.provider; |
| |
| import java.math.BigInteger; |
| |
| import java.security.interfaces.RSAPrivateCrtKey; |
| import java.security.spec.RSAPrivateCrtKeySpec; |
| |
| import java.util.ArrayList; |
| |
| import gnu.java.security.OID; |
| import gnu.java.security.der.DER; |
| import gnu.java.security.der.DERValue; |
| |
| class GnuRSAPrivateKey implements RSAPrivateCrtKey |
| { |
| |
| // Fields. |
| // ------------------------------------------------------------------------- |
| |
| private final RSAPrivateCrtKeySpec spec; |
| private byte[] encodedKey; |
| |
| // Constructor. |
| // ------------------------------------------------------------------------- |
| |
| public GnuRSAPrivateKey(RSAPrivateCrtKeySpec spec) |
| { |
| this.spec = spec; |
| } |
| |
| // Instance methods. |
| // ------------------------------------------------------------------------- |
| |
| public BigInteger getModulus() |
| { |
| return spec.getModulus(); |
| } |
| |
| public BigInteger getPrivateExponent() |
| { |
| return spec.getPrivateExponent(); |
| } |
| |
| public BigInteger getCrtCoefficient() |
| { |
| return spec.getCrtCoefficient(); |
| } |
| |
| public BigInteger getPrimeExponentP() |
| { |
| return spec.getPrimeExponentP(); |
| } |
| |
| public BigInteger getPrimeExponentQ() |
| { |
| return spec.getPrimeExponentQ(); |
| } |
| |
| public BigInteger getPrimeP() |
| { |
| return spec.getPrimeP(); |
| } |
| |
| public BigInteger getPrimeQ() |
| { |
| return spec.getPrimeQ(); |
| } |
| |
| public BigInteger getPublicExponent() |
| { |
| return spec.getPublicExponent(); |
| } |
| |
| public String getAlgorithm() |
| { |
| return "RSA"; |
| } |
| |
| public String getFormat() |
| { |
| return "PKCS#8"; |
| } |
| |
| /** |
| * The encoded form is: |
| * |
| * <pre> |
| * RSAPrivateKey ::= SEQUENCE { |
| * version Version, |
| * modulus INTEGER, -- n |
| * publicExponent INTEGER, -- e |
| * privateExponent INTEGER, -- d |
| * prime1 INTEGER, -- p |
| * prime2 INTEGER, -- q |
| * exponent1 INTEGER, -- d mod (p-1) |
| * exponent2 INTEGER, -- d mod (q-1) |
| * coefficient INTEGER -- (inverse of q) mod p } |
| * </pre> |
| * |
| * <p>Which is in turn encoded in a PrivateKeyInfo structure from PKCS#8. |
| */ |
| public byte[] getEncoded() |
| { |
| if (encodedKey != null) |
| return (byte[]) encodedKey.clone(); |
| ArrayList key = new ArrayList(9); |
| key.add(new DERValue(DER.INTEGER, BigInteger.ZERO)); |
| key.add(new DERValue(DER.INTEGER, getModulus())); |
| key.add(new DERValue(DER.INTEGER, getPublicExponent())); |
| key.add(new DERValue(DER.INTEGER, getPrivateExponent())); |
| key.add(new DERValue(DER.INTEGER, getPrimeP())); |
| key.add(new DERValue(DER.INTEGER, getPrimeQ())); |
| key.add(new DERValue(DER.INTEGER, getPrimeExponentP())); |
| key.add(new DERValue(DER.INTEGER, getPrimeExponentQ())); |
| key.add(new DERValue(DER.INTEGER, getCrtCoefficient())); |
| DERValue pk = new DERValue(DER.SEQUENCE|DER.CONSTRUCTED, key); |
| ArrayList pki = new ArrayList(3); |
| pki.add(new DERValue(DER.INTEGER, BigInteger.ZERO)); |
| ArrayList alg = new ArrayList(2); |
| alg.add(new DERValue(DER.OBJECT_IDENTIFIER, |
| new OID("1.2.840.113549.1.1.1"))); |
| alg.add(new DERValue(DER.NULL, null)); |
| pki.add(new DERValue(DER.CONSTRUCTED|DER.SEQUENCE, alg)); |
| pki.add(new DERValue(DER.OCTET_STRING, pk.getEncoded())); |
| encodedKey = new DERValue(DER.SEQUENCE|DER.CONSTRUCTED, pki).getEncoded(); |
| return (byte[]) encodedKey.clone(); |
| } |
| } |