| /* |
| * Copyright (c) 1996, 2007, 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.ssl; |
| |
| import java.util.Arrays; |
| |
| import java.security.*; |
| |
| /** |
| * Signature implementation for the SSL/TLS RSA Signature variant with both |
| * MD5 and SHA-1 MessageDigests. Used for explicit RSA server authentication |
| * (RSA signed server key exchange for RSA_EXPORT and DHE_RSA) and RSA client |
| * authentication (RSA signed certificate verify message). |
| * |
| * It conforms to the standard JCA Signature API. It is registered in the |
| * SunJSSE provider to avoid more complicated getInstance() code and |
| * negative interaction with the JCA mechanisms for hardware providers. |
| * |
| * The class should be instantiated via the getInstance() method in this class, |
| * which returns the implementation from the prefered provider. The internal |
| * implementation allows the hashes to be explicitly set, which is required |
| * for RSA client authentication. It can be obtained via the |
| * getInternalInstance() method. |
| * |
| * This class is not thread safe. |
| * |
| */ |
| public final class RSASignature extends SignatureSpi { |
| |
| private final Signature rawRsa; |
| private MessageDigest md5, sha; |
| |
| // flag indicating if the MessageDigests are in reset state |
| private boolean isReset; |
| |
| public RSASignature() throws NoSuchAlgorithmException { |
| super(); |
| rawRsa = JsseJce.getSignature(JsseJce.SIGNATURE_RAWRSA); |
| isReset = true; |
| } |
| |
| /** |
| * Get an implementation for the RSA signature. Follows the standard |
| * JCA getInstance() model, so it return the implementation from the |
| * provider with the highest precedence, which may be this class. |
| */ |
| static Signature getInstance() throws NoSuchAlgorithmException { |
| return JsseJce.getSignature(JsseJce.SIGNATURE_SSLRSA); |
| } |
| |
| /** |
| * Get an internal implementation for the RSA signature. Used for RSA |
| * client authentication, which needs the ability to set the digests |
| * to externally provided values via the setHashes() method. |
| */ |
| static Signature getInternalInstance() |
| throws NoSuchAlgorithmException, NoSuchProviderException { |
| return Signature.getInstance(JsseJce.SIGNATURE_SSLRSA, "SunJSSE"); |
| } |
| |
| /** |
| * Set the MD5 and SHA hashes to the provided objects. |
| */ |
| static void setHashes(Signature sig, MessageDigest md5, MessageDigest sha) { |
| sig.setParameter("hashes", new MessageDigest[] {md5, sha}); |
| } |
| |
| /** |
| * Reset the MessageDigests unless they are already reset. |
| */ |
| private void reset() { |
| if (isReset == false) { |
| md5.reset(); |
| sha.reset(); |
| isReset = true; |
| } |
| } |
| |
| private static void checkNull(Key key) throws InvalidKeyException { |
| if (key == null) { |
| throw new InvalidKeyException("Key must not be null"); |
| } |
| } |
| |
| protected void engineInitVerify(PublicKey publicKey) |
| throws InvalidKeyException { |
| checkNull(publicKey); |
| reset(); |
| rawRsa.initVerify(publicKey); |
| } |
| |
| protected void engineInitSign(PrivateKey privateKey) |
| throws InvalidKeyException { |
| engineInitSign(privateKey, null); |
| } |
| |
| protected void engineInitSign(PrivateKey privateKey, SecureRandom random) |
| throws InvalidKeyException { |
| checkNull(privateKey); |
| reset(); |
| rawRsa.initSign(privateKey, random); |
| } |
| |
| // lazily initialize the MessageDigests |
| private void initDigests() { |
| if (md5 == null) { |
| md5 = JsseJce.getMD5(); |
| sha = JsseJce.getSHA(); |
| } |
| } |
| |
| protected void engineUpdate(byte b) { |
| initDigests(); |
| isReset = false; |
| md5.update(b); |
| sha.update(b); |
| } |
| |
| protected void engineUpdate(byte[] b, int off, int len) { |
| initDigests(); |
| isReset = false; |
| md5.update(b, off, len); |
| sha.update(b, off, len); |
| } |
| |
| private byte[] getDigest() throws SignatureException { |
| try { |
| initDigests(); |
| byte[] data = new byte[36]; |
| md5.digest(data, 0, 16); |
| sha.digest(data, 16, 20); |
| isReset = true; |
| return data; |
| } catch (DigestException e) { |
| // should never occur |
| throw new SignatureException(e); |
| } |
| } |
| |
| protected byte[] engineSign() throws SignatureException { |
| rawRsa.update(getDigest()); |
| return rawRsa.sign(); |
| } |
| |
| protected boolean engineVerify(byte[] sigBytes) throws SignatureException { |
| return engineVerify(sigBytes, 0, sigBytes.length); |
| } |
| |
| protected boolean engineVerify(byte[] sigBytes, int offset, int length) |
| throws SignatureException { |
| rawRsa.update(getDigest()); |
| return rawRsa.verify(sigBytes, offset, length); |
| } |
| |
| protected void engineSetParameter(String param, Object value) |
| throws InvalidParameterException { |
| if (param.equals("hashes") == false) { |
| throw new InvalidParameterException |
| ("Parameter not supported: " + param); |
| } |
| if (value instanceof MessageDigest[] == false) { |
| throw new InvalidParameterException |
| ("value must be MessageDigest[]"); |
| } |
| MessageDigest[] digests = (MessageDigest[])value; |
| md5 = digests[0]; |
| sha = digests[1]; |
| } |
| |
| protected Object engineGetParameter(String param) |
| throws InvalidParameterException { |
| throw new InvalidParameterException("Parameters not supported"); |
| } |
| |
| } |