0N/A/*
2362N/A * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage com.sun.crypto.provider;
0N/A
0N/Aimport java.security.Key;
0N/Aimport java.security.PublicKey;
0N/Aimport java.security.PrivateKey;
0N/Aimport java.security.KeyFactory;
0N/Aimport java.security.InvalidKeyException;
0N/Aimport java.security.NoSuchProviderException;
0N/Aimport java.security.NoSuchAlgorithmException;
0N/Aimport java.security.spec.PKCS8EncodedKeySpec;
0N/Aimport java.security.spec.X509EncodedKeySpec;
0N/Aimport java.security.spec.InvalidKeySpecException;
0N/A
0N/Aimport javax.crypto.SecretKey;
0N/Aimport javax.crypto.Cipher;
0N/Aimport javax.crypto.spec.SecretKeySpec;
0N/A
0N/A/**
0N/A * This class is a helper class which construct key objects
0N/A * from encoded keys.
0N/A *
0N/A * @author Sharon Liu
0N/A *
0N/A */
0N/A
0N/Afinal class ConstructKeys {
0N/A /**
0N/A * Construct a public key from its encoding.
0N/A *
0N/A * @param encodedKey the encoding of a public key.
0N/A *
0N/A * @param encodedKeyAlgorithm the algorithm the encodedKey is for.
0N/A *
0N/A * @return a public key constructed from the encodedKey.
0N/A */
0N/A private static final PublicKey constructPublicKey(byte[] encodedKey,
0N/A String encodedKeyAlgorithm)
0N/A throws InvalidKeyException, NoSuchAlgorithmException
0N/A {
0N/A PublicKey key = null;
0N/A
0N/A try {
0N/A KeyFactory keyFactory =
0N/A KeyFactory.getInstance(encodedKeyAlgorithm, "SunJCE");
0N/A X509EncodedKeySpec keySpec = new X509EncodedKeySpec(encodedKey);
0N/A key = keyFactory.generatePublic(keySpec);
0N/A } catch (NoSuchAlgorithmException nsae) {
0N/A // Try to see whether there is another
0N/A // provider which supports this algorithm
0N/A try {
0N/A KeyFactory keyFactory =
0N/A KeyFactory.getInstance(encodedKeyAlgorithm);
0N/A X509EncodedKeySpec keySpec =
0N/A new X509EncodedKeySpec(encodedKey);
0N/A key = keyFactory.generatePublic(keySpec);
0N/A } catch (NoSuchAlgorithmException nsae2) {
0N/A throw new NoSuchAlgorithmException("No installed providers " +
0N/A "can create keys for the " +
0N/A encodedKeyAlgorithm +
0N/A "algorithm");
0N/A } catch (InvalidKeySpecException ikse2) {
0N/A InvalidKeyException ike =
0N/A new InvalidKeyException("Cannot construct public key");
0N/A ike.initCause(ikse2);
0N/A throw ike;
0N/A }
0N/A } catch (InvalidKeySpecException ikse) {
0N/A InvalidKeyException ike =
0N/A new InvalidKeyException("Cannot construct public key");
0N/A ike.initCause(ikse);
0N/A throw ike;
0N/A } catch (NoSuchProviderException nspe) {
0N/A // Should never happen.
0N/A }
0N/A
0N/A return key;
0N/A }
0N/A
0N/A /**
0N/A * Construct a private key from its encoding.
0N/A *
0N/A * @param encodedKey the encoding of a private key.
0N/A *
0N/A * @param encodedKeyAlgorithm the algorithm the wrapped key is for.
0N/A *
0N/A * @return a private key constructed from the encodedKey.
0N/A */
0N/A private static final PrivateKey constructPrivateKey(byte[] encodedKey,
0N/A String encodedKeyAlgorithm)
0N/A throws InvalidKeyException, NoSuchAlgorithmException
0N/A {
0N/A PrivateKey key = null;
0N/A
0N/A try {
0N/A KeyFactory keyFactory =
0N/A KeyFactory.getInstance(encodedKeyAlgorithm, "SunJCE");
0N/A PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(encodedKey);
0N/A return keyFactory.generatePrivate(keySpec);
0N/A } catch (NoSuchAlgorithmException nsae) {
0N/A // Try to see whether there is another
0N/A // provider which supports this algorithm
0N/A try {
0N/A KeyFactory keyFactory =
0N/A KeyFactory.getInstance(encodedKeyAlgorithm);
0N/A PKCS8EncodedKeySpec keySpec =
0N/A new PKCS8EncodedKeySpec(encodedKey);
0N/A key = keyFactory.generatePrivate(keySpec);
0N/A } catch (NoSuchAlgorithmException nsae2) {
0N/A throw new NoSuchAlgorithmException("No installed providers " +
0N/A "can create keys for the " +
0N/A encodedKeyAlgorithm +
0N/A "algorithm");
0N/A } catch (InvalidKeySpecException ikse2) {
0N/A InvalidKeyException ike =
0N/A new InvalidKeyException("Cannot construct private key");
0N/A ike.initCause(ikse2);
0N/A throw ike;
0N/A }
0N/A } catch (InvalidKeySpecException ikse) {
0N/A InvalidKeyException ike =
0N/A new InvalidKeyException("Cannot construct private key");
0N/A ike.initCause(ikse);
0N/A throw ike;
0N/A } catch (NoSuchProviderException nspe) {
0N/A // Should never happen.
0N/A }
0N/A
0N/A return key;
0N/A }
0N/A
0N/A /**
0N/A * Construct a secret key from its encoding.
0N/A *
0N/A * @param encodedKey the encoding of a secret key.
0N/A *
0N/A * @param encodedKeyAlgorithm the algorithm the secret key is for.
0N/A *
0N/A * @return a secret key constructed from the encodedKey.
0N/A */
0N/A private static final SecretKey constructSecretKey(byte[] encodedKey,
0N/A String encodedKeyAlgorithm)
0N/A {
0N/A return (new SecretKeySpec(encodedKey, encodedKeyAlgorithm));
0N/A }
0N/A
0N/A static final Key constructKey(byte[] encoding, String keyAlgorithm,
0N/A int keyType)
0N/A throws InvalidKeyException, NoSuchAlgorithmException {
0N/A Key result = null;
0N/A switch (keyType) {
0N/A case Cipher.SECRET_KEY:
0N/A result = ConstructKeys.constructSecretKey(encoding,
0N/A keyAlgorithm);
0N/A break;
0N/A case Cipher.PRIVATE_KEY:
0N/A result = ConstructKeys.constructPrivateKey(encoding,
0N/A keyAlgorithm);
0N/A break;
0N/A case Cipher.PUBLIC_KEY:
0N/A result = ConstructKeys.constructPublicKey(encoding,
0N/A keyAlgorithm);
0N/A break;
0N/A }
0N/A return result;
0N/A }
0N/A}