| /* RSAKeyFactory.java -- RSA key-factory JCE Adapter |
| Copyright (C) 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 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.jce.sig; |
| |
| import gnu.java.security.Registry; |
| import gnu.java.security.key.rsa.GnuRSAPrivateKey; |
| import gnu.java.security.key.rsa.GnuRSAPublicKey; |
| import gnu.java.security.key.rsa.RSAKeyPairPKCS8Codec; |
| import gnu.java.security.key.rsa.RSAKeyPairX509Codec; |
| |
| import java.math.BigInteger; |
| import java.security.InvalidKeyException; |
| import java.security.Key; |
| import java.security.KeyFactorySpi; |
| import java.security.PrivateKey; |
| import java.security.PublicKey; |
| import java.security.interfaces.RSAPrivateCrtKey; |
| import java.security.interfaces.RSAPrivateKey; |
| import java.security.interfaces.RSAPublicKey; |
| import java.security.spec.InvalidKeySpecException; |
| import java.security.spec.KeySpec; |
| import java.security.spec.PKCS8EncodedKeySpec; |
| import java.security.spec.RSAPrivateCrtKeySpec; |
| import java.security.spec.RSAPrivateKeySpec; |
| import java.security.spec.RSAPublicKeySpec; |
| import java.security.spec.X509EncodedKeySpec; |
| |
| public class RSAKeyFactory |
| extends KeyFactorySpi |
| { |
| // implicit 0-arguments constructor |
| |
| protected PublicKey engineGeneratePublic(KeySpec keySpec) |
| throws InvalidKeySpecException |
| { |
| if (keySpec instanceof RSAPublicKeySpec) |
| { |
| RSAPublicKeySpec spec = (RSAPublicKeySpec) keySpec; |
| BigInteger n = spec.getModulus(); |
| BigInteger e = spec.getPublicExponent(); |
| return new GnuRSAPublicKey(Registry.X509_ENCODING_ID, n, e); |
| } |
| if (keySpec instanceof X509EncodedKeySpec) |
| { |
| X509EncodedKeySpec spec = (X509EncodedKeySpec) keySpec; |
| byte[] encoded = spec.getEncoded(); |
| PublicKey result; |
| try |
| { |
| return new RSAKeyPairX509Codec().decodePublicKey(encoded); |
| } |
| catch (RuntimeException x) |
| { |
| throw new InvalidKeySpecException(x.getMessage(), x); |
| } |
| } |
| throw new InvalidKeySpecException("Unsupported (public) key specification"); |
| } |
| |
| protected PrivateKey engineGeneratePrivate(KeySpec keySpec) |
| throws InvalidKeySpecException |
| { |
| if (keySpec instanceof RSAPrivateCrtKeySpec) |
| { |
| RSAPrivateCrtKeySpec spec = (RSAPrivateCrtKeySpec) keySpec; |
| BigInteger n = spec.getModulus(); |
| BigInteger e = spec.getPublicExponent(); |
| BigInteger d = spec.getPrivateExponent(); |
| BigInteger p = spec.getPrimeP(); |
| BigInteger q = spec.getPrimeQ(); |
| BigInteger dP = spec.getPrimeExponentP(); |
| BigInteger dQ = spec.getPrimeExponentQ(); |
| BigInteger qInv = spec.getCrtCoefficient(); |
| return new GnuRSAPrivateKey(Registry.PKCS8_ENCODING_ID, |
| n, e, d, p, q, dP, dQ, qInv); |
| } |
| if (keySpec instanceof PKCS8EncodedKeySpec) |
| { |
| PKCS8EncodedKeySpec spec = (PKCS8EncodedKeySpec) keySpec; |
| byte[] encoded = spec.getEncoded(); |
| PrivateKey result; |
| try |
| { |
| return new RSAKeyPairPKCS8Codec().decodePrivateKey(encoded); |
| } |
| catch (RuntimeException x) |
| { |
| throw new InvalidKeySpecException(x.getMessage(), x); |
| } |
| } |
| throw new InvalidKeySpecException("Unsupported (private) key specification"); |
| } |
| |
| protected KeySpec engineGetKeySpec(Key key, Class keySpec) |
| throws InvalidKeySpecException |
| { |
| if (key instanceof RSAPublicKey) |
| { |
| if (keySpec.isAssignableFrom(RSAPublicKeySpec.class)) |
| { |
| RSAPublicKey rsaKey = (RSAPublicKey) key; |
| BigInteger n = rsaKey.getModulus(); |
| BigInteger e = rsaKey.getPublicExponent(); |
| return new RSAPublicKeySpec(n, e); |
| } |
| if (keySpec.isAssignableFrom(X509EncodedKeySpec.class)) |
| { |
| if (key instanceof GnuRSAPublicKey) |
| { |
| GnuRSAPublicKey rsaKey = (GnuRSAPublicKey) key; |
| byte[] encoded = rsaKey.getEncoded(Registry.X509_ENCODING_ID); |
| return new X509EncodedKeySpec(encoded); |
| } |
| |
| if (Registry.X509_ENCODING_SORT_NAME.equalsIgnoreCase(key.getFormat())) |
| { |
| byte[] encoded = key.getEncoded(); |
| return new X509EncodedKeySpec(encoded); |
| } |
| throw new InvalidKeySpecException( |
| "Wrong key type or unsupported (public) key specification"); |
| } |
| throw new InvalidKeySpecException("Unsupported (public) key specification"); |
| } |
| if ((key instanceof RSAPrivateCrtKey) |
| && keySpec.isAssignableFrom(RSAPrivateCrtKeySpec.class)) |
| { |
| RSAPrivateCrtKey rsaKey = (RSAPrivateCrtKey) key; |
| BigInteger n = rsaKey.getModulus(); |
| BigInteger e = rsaKey.getPublicExponent(); |
| BigInteger d = rsaKey.getPrivateExponent(); |
| BigInteger p = rsaKey.getPrimeP(); |
| BigInteger q = rsaKey.getPrimeQ(); |
| BigInteger dP = rsaKey.getPrimeExponentP(); |
| BigInteger dQ = rsaKey.getPrimeExponentQ(); |
| BigInteger qInv = rsaKey.getCrtCoefficient(); |
| return new RSAPrivateCrtKeySpec(n, e, d, p, q, dP, dQ, qInv); |
| } |
| if ((key instanceof RSAPrivateKey) |
| && keySpec.isAssignableFrom(RSAPrivateKeySpec.class)) |
| { |
| RSAPrivateKey rsaKey = (RSAPrivateKey) key; |
| BigInteger n = rsaKey.getModulus(); |
| BigInteger d = rsaKey.getPrivateExponent(); |
| return new RSAPrivateKeySpec(n, d); |
| } |
| if (keySpec.isAssignableFrom(PKCS8EncodedKeySpec.class)) |
| { |
| if (key instanceof GnuRSAPrivateKey) |
| { |
| GnuRSAPrivateKey rsaKey = (GnuRSAPrivateKey) key; |
| byte[] encoded = rsaKey.getEncoded(Registry.PKCS8_ENCODING_ID); |
| return new PKCS8EncodedKeySpec(encoded); |
| } |
| if (Registry.PKCS8_ENCODING_SHORT_NAME.equalsIgnoreCase(key.getFormat())) |
| { |
| byte[] encoded = key.getEncoded(); |
| return new PKCS8EncodedKeySpec(encoded); |
| } |
| throw new InvalidKeySpecException( |
| "Wrong key type or unsupported (private) key specification"); |
| } |
| throw new InvalidKeySpecException( |
| "Wrong key type or unsupported key specification"); |
| } |
| |
| protected Key engineTranslateKey(Key key) throws InvalidKeyException |
| { |
| if ((key instanceof GnuRSAPublicKey) || (key instanceof GnuRSAPrivateKey)) |
| return key; |
| |
| if (key instanceof RSAPublicKey) |
| { |
| RSAPublicKey rsaKey = (RSAPublicKey) key; |
| BigInteger n = rsaKey.getModulus(); |
| BigInteger e = rsaKey.getPublicExponent(); |
| return new GnuRSAPublicKey(Registry.X509_ENCODING_ID, n, e); |
| } |
| if (key instanceof RSAPrivateCrtKey) |
| { |
| RSAPrivateCrtKey rsaKey = (RSAPrivateCrtKey) key; |
| BigInteger n = rsaKey.getModulus(); |
| BigInteger e = rsaKey.getPublicExponent(); |
| BigInteger d = rsaKey.getPrivateExponent(); |
| BigInteger p = rsaKey.getPrimeP(); |
| BigInteger q = rsaKey.getPrimeQ(); |
| BigInteger dP = rsaKey.getPrimeExponentP(); |
| BigInteger dQ = rsaKey.getPrimeExponentQ(); |
| BigInteger qInv = rsaKey.getCrtCoefficient(); |
| return new GnuRSAPrivateKey(Registry.PKCS8_ENCODING_ID, |
| n, e, d, p, q, dP, dQ, qInv); |
| } |
| throw new InvalidKeyException("Unsupported key type"); |
| } |
| } |
