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/*
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* Copyright 1996-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package java.security;
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import java.security.spec.AlgorithmParameterSpec;
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import java.util.*;
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import java.util.concurrent.ConcurrentHashMap;
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import java.io.*;
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import java.security.cert.Certificate;
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import java.security.cert.X509Certificate;
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import java.nio.ByteBuffer;
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import java.security.Provider.Service;
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import javax.crypto.Cipher;
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import javax.crypto.CipherSpi;
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import javax.crypto.IllegalBlockSizeException;
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import javax.crypto.BadPaddingException;
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import javax.crypto.NoSuchPaddingException;
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import sun.security.util.Debug;
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import sun.security.jca.*;
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import sun.security.jca.GetInstance.Instance;
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/**
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* This Signature class is used to provide applications the functionality
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* of a digital signature algorithm. Digital signatures are used for
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* authentication and integrity assurance of digital data.
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*
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* <p> The signature algorithm can be, among others, the NIST standard
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* DSA, using DSA and SHA-1. The DSA algorithm using the
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* SHA-1 message digest algorithm can be specified as <tt>SHA1withDSA</tt>.
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* In the case of RSA, there are multiple choices for the message digest
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* algorithm, so the signing algorithm could be specified as, for example,
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* <tt>MD2withRSA</tt>, <tt>MD5withRSA</tt>, or <tt>SHA1withRSA</tt>.
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* The algorithm name must be specified, as there is no default.
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*
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* <p> A Signature object can be used to generate and verify digital
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* signatures.
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*
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* <p> There are three phases to the use of a Signature object for
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* either signing data or verifying a signature:<ol>
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*
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* <li>Initialization, with either
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*
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* <ul>
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*
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* <li>a public key, which initializes the signature for
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* verification (see {@link #initVerify(PublicKey) initVerify}), or
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*
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* <li>a private key (and optionally a Secure Random Number Generator),
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* which initializes the signature for signing
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* (see {@link #initSign(PrivateKey)}
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* and {@link #initSign(PrivateKey, SecureRandom)}).
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*
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* </ul><p>
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*
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* <li>Updating<p>
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*
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* <p>Depending on the type of initialization, this will update the
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* bytes to be signed or verified. See the
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* {@link #update(byte) update} methods.<p>
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*
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* <li>Signing or Verifying a signature on all updated bytes. See the
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* {@link #sign() sign} methods and the {@link #verify(byte[]) verify}
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* method.
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*
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* </ol>
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*
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* <p>Note that this class is abstract and extends from
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* <code>SignatureSpi</code> for historical reasons.
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* Application developers should only take notice of the methods defined in
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* this <code>Signature</code> class; all the methods in
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* the superclass are intended for cryptographic service providers who wish to
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* supply their own implementations of digital signature algorithms.
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*
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* @author Benjamin Renaud
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*
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*/
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public abstract class Signature extends SignatureSpi {
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private static final Debug debug =
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Debug.getInstance("jca", "Signature");
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/*
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* The algorithm for this signature object.
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* This value is used to map an OID to the particular algorithm.
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* The mapping is done in AlgorithmObject.algOID(String algorithm)
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*/
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private String algorithm;
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// The provider
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Provider provider;
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/**
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* Possible {@link #state} value, signifying that
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* this signature object has not yet been initialized.
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*/
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protected final static int UNINITIALIZED = 0;
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/**
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* Possible {@link #state} value, signifying that
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* this signature object has been initialized for signing.
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*/
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protected final static int SIGN = 2;
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/**
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* Possible {@link #state} value, signifying that
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* this signature object has been initialized for verification.
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*/
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protected final static int VERIFY = 3;
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/**
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* Current state of this signature object.
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*/
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protected int state = UNINITIALIZED;
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/**
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* Creates a Signature object for the specified algorithm.
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*
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* @param algorithm the standard string name of the algorithm.
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* See Appendix A in the <a href=
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* "../../../technotes/guides/security/crypto/CryptoSpec.html#AppA">
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* Java Cryptography Architecture API Specification & Reference </a>
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* for information about standard algorithm names.
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*/
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protected Signature(String algorithm) {
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this.algorithm = algorithm;
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}
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// name of the special signature alg
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private final static String RSA_SIGNATURE = "NONEwithRSA";
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// name of the equivalent cipher alg
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private final static String RSA_CIPHER = "RSA/ECB/PKCS1Padding";
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// all the services we need to lookup for compatibility with Cipher
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private final static List<ServiceId> rsaIds = Arrays.asList(
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new ServiceId[] {
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new ServiceId("Signature", "NONEwithRSA"),
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new ServiceId("Cipher", "RSA/ECB/PKCS1Padding"),
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new ServiceId("Cipher", "RSA/ECB"),
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new ServiceId("Cipher", "RSA//PKCS1Padding"),
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new ServiceId("Cipher", "RSA"),
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}
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);
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/**
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* Returns a Signature object that implements the specified signature
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* algorithm.
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*
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* <p> This method traverses the list of registered security Providers,
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* starting with the most preferred Provider.
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* A new Signature object encapsulating the
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* SignatureSpi implementation from the first
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* Provider that supports the specified algorithm is returned.
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*
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* <p> Note that the list of registered providers may be retrieved via
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* the {@link Security#getProviders() Security.getProviders()} method.
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*
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* @param algorithm the standard name of the algorithm requested.
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* See Appendix A in the <a href=
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* "../../../technotes/guides/security/crypto/CryptoSpec.html#AppA">
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* Java Cryptography Architecture API Specification & Reference </a>
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* for information about standard algorithm names.
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*
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* @return the new Signature object.
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*
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* @exception NoSuchAlgorithmException if no Provider supports a
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* Signature implementation for the
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* specified algorithm.
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*
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* @see Provider
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*/
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public static Signature getInstance(String algorithm)
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throws NoSuchAlgorithmException {
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List<Service> list;
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if (algorithm.equalsIgnoreCase(RSA_SIGNATURE)) {
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list = GetInstance.getServices(rsaIds);
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} else {
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list = GetInstance.getServices("Signature", algorithm);
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}
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Iterator<Service> t = list.iterator();
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if (t.hasNext() == false) {
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throw new NoSuchAlgorithmException
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(algorithm + " Signature not available");
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}
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// try services until we find an Spi or a working Signature subclass
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NoSuchAlgorithmException failure;
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do {
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Service s = t.next();
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if (isSpi(s)) {
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return new Delegate(s, t, algorithm);
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} else {
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// must be a subclass of Signature, disable dynamic selection
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try {
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Instance instance =
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GetInstance.getInstance(s, SignatureSpi.class);
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return getInstance(instance, algorithm);
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} catch (NoSuchAlgorithmException e) {
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failure = e;
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}
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}
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} while (t.hasNext());
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throw failure;
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}
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private static Signature getInstance(Instance instance, String algorithm) {
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Signature sig;
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if (instance.impl instanceof Signature) {
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sig = (Signature)instance.impl;
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} else {
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SignatureSpi spi = (SignatureSpi)instance.impl;
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sig = new Delegate(spi, algorithm);
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}
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sig.provider = instance.provider;
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return sig;
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}
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private final static Map<String,Boolean> signatureInfo;
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static {
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signatureInfo = new ConcurrentHashMap<String,Boolean>();
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Boolean TRUE = Boolean.TRUE;
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// pre-initialize with values for our SignatureSpi implementations
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signatureInfo.put("sun.security.provider.DSA$RawDSA", TRUE);
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signatureInfo.put("sun.security.provider.DSA$SHA1withDSA", TRUE);
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signatureInfo.put("sun.security.rsa.RSASignature$MD2withRSA", TRUE);
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signatureInfo.put("sun.security.rsa.RSASignature$MD5withRSA", TRUE);
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signatureInfo.put("sun.security.rsa.RSASignature$SHA1withRSA", TRUE);
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signatureInfo.put("sun.security.rsa.RSASignature$SHA256withRSA", TRUE);
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signatureInfo.put("sun.security.rsa.RSASignature$SHA384withRSA", TRUE);
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signatureInfo.put("sun.security.rsa.RSASignature$SHA512withRSA", TRUE);
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signatureInfo.put("com.sun.net.ssl.internal.ssl.RSASignature", TRUE);
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signatureInfo.put("sun.security.pkcs11.P11Signature", TRUE);
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}
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private static boolean isSpi(Service s) {
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if (s.getType().equals("Cipher")) {
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// must be a CipherSpi, which we can wrap with the CipherAdapter
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return true;
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}
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String className = s.getClassName();
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Boolean result = signatureInfo.get(className);
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if (result == null) {
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try {
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Object instance = s.newInstance(null);
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// Signature extends SignatureSpi
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// so it is a "real" Spi if it is an
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// instance of SignatureSpi but not Signature
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boolean r = (instance instanceof SignatureSpi)
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&& (instance instanceof Signature == false);
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if ((debug != null) && (r == false)) {
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debug.println("Not a SignatureSpi " + className);
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debug.println("Delayed provider selection may not be "
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+ "available for algorithm " + s.getAlgorithm());
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}
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result = Boolean.valueOf(r);
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signatureInfo.put(className, result);
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} catch (Exception e) {
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// something is wrong, assume not an SPI
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return false;
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}
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}
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return result.booleanValue();
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}
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/**
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* Returns a Signature object that implements the specified signature
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* algorithm.
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*
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* <p> A new Signature object encapsulating the
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* SignatureSpi implementation from the specified provider
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* is returned. The specified provider must be registered
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* in the security provider list.
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*
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* <p> Note that the list of registered providers may be retrieved via
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* the {@link Security#getProviders() Security.getProviders()} method.
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*
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* @param algorithm the name of the algorithm requested.
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* See Appendix A in the <a href=
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* "../../../technotes/guides/security/crypto/CryptoSpec.html#AppA">
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* Java Cryptography Architecture API Specification & Reference </a>
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* for information about standard algorithm names.
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*
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* @param provider the name of the provider.
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*
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* @return the new Signature object.
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*
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* @exception NoSuchAlgorithmException if a SignatureSpi
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* implementation for the specified algorithm is not
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* available from the specified provider.
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*
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* @exception NoSuchProviderException if the specified provider is not
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* registered in the security provider list.
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*
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* @exception IllegalArgumentException if the provider name is null
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* or empty.
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*
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* @see Provider
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*/
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public static Signature getInstance(String algorithm, String provider)
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throws NoSuchAlgorithmException, NoSuchProviderException {
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if (algorithm.equalsIgnoreCase(RSA_SIGNATURE)) {
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// exception compatibility with existing code
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if ((provider == null) || (provider.length() == 0)) {
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throw new IllegalArgumentException("missing provider");
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}
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Provider p = Security.getProvider(provider);
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if (p == null) {
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throw new NoSuchProviderException
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("no such provider: " + provider);
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}
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return getInstanceRSA(p);
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}
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Instance instance = GetInstance.getInstance
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("Signature", SignatureSpi.class, algorithm, provider);
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return getInstance(instance, algorithm);
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}
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/**
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* Returns a Signature object that implements the specified
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* signature algorithm.
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*
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* <p> A new Signature object encapsulating the
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* SignatureSpi implementation from the specified Provider
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* object is returned. Note that the specified Provider object
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* does not have to be registered in the provider list.
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*
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* @param algorithm the name of the algorithm requested.
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* See Appendix A in the <a href=
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* "../../../technotes/guides/security/crypto/CryptoSpec.html#AppA">
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* Java Cryptography Architecture API Specification & Reference </a>
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* for information about standard algorithm names.
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*
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* @param provider the provider.
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*
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* @return the new Signature object.
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*
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* @exception NoSuchAlgorithmException if a SignatureSpi
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* implementation for the specified algorithm is not available
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* from the specified Provider object.
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*
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* @exception IllegalArgumentException if the provider is null.
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*
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* @see Provider
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*
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* @since 1.4
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*/
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public static Signature getInstance(String algorithm, Provider provider)
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throws NoSuchAlgorithmException {
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if (algorithm.equalsIgnoreCase(RSA_SIGNATURE)) {
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// exception compatibility with existing code
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if (provider == null) {
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throw new IllegalArgumentException("missing provider");
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}
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return getInstanceRSA(provider);
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}
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Instance instance = GetInstance.getInstance
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("Signature", SignatureSpi.class, algorithm, provider);
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return getInstance(instance, algorithm);
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}
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// return an implementation for NONEwithRSA, which is a special case
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// because of the Cipher.RSA/ECB/PKCS1Padding compatibility wrapper
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private static Signature getInstanceRSA(Provider p)
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throws NoSuchAlgorithmException {
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// try Signature first
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Service s = p.getService("Signature", RSA_SIGNATURE);
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if (s != null) {
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Instance instance = GetInstance.getInstance(s, SignatureSpi.class);
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return getInstance(instance, RSA_SIGNATURE);
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}
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// check Cipher
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try {
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Cipher c = Cipher.getInstance(RSA_CIPHER, p);
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return new Delegate(new CipherAdapter(c), RSA_SIGNATURE);
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} catch (GeneralSecurityException e) {
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// throw Signature style exception message to avoid confusion,
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// but append Cipher exception as cause
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throw new NoSuchAlgorithmException("no such algorithm: "
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+ RSA_SIGNATURE + " for provider " + p.getName(), e);
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}
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}
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411 |
/**
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412 |
* Returns the provider of this signature object.
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*
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* @return the provider of this signature object
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*/
|
|
416 |
public final Provider getProvider() {
|
|
417 |
chooseFirstProvider();
|
|
418 |
return this.provider;
|
|
419 |
}
|
|
420 |
|
|
421 |
void chooseFirstProvider() {
|
|
422 |
// empty, overridden in Delegate
|
|
423 |
}
|
|
424 |
|
|
425 |
/**
|
|
426 |
* Initializes this object for verification. If this method is called
|
|
427 |
* again with a different argument, it negates the effect
|
|
428 |
* of this call.
|
|
429 |
*
|
|
430 |
* @param publicKey the public key of the identity whose signature is
|
|
431 |
* going to be verified.
|
|
432 |
*
|
|
433 |
* @exception InvalidKeyException if the key is invalid.
|
|
434 |
*/
|
|
435 |
public final void initVerify(PublicKey publicKey)
|
|
436 |
throws InvalidKeyException {
|
|
437 |
engineInitVerify(publicKey);
|
|
438 |
state = VERIFY;
|
|
439 |
}
|
|
440 |
|
|
441 |
/**
|
|
442 |
* Initializes this object for verification, using the public key from
|
|
443 |
* the given certificate.
|
|
444 |
* <p>If the certificate is of type X.509 and has a <i>key usage</i>
|
|
445 |
* extension field marked as critical, and the value of the <i>key usage</i>
|
|
446 |
* extension field implies that the public key in
|
|
447 |
* the certificate and its corresponding private key are not
|
|
448 |
* supposed to be used for digital signatures, an
|
|
449 |
* <code>InvalidKeyException</code> is thrown.
|
|
450 |
*
|
|
451 |
* @param certificate the certificate of the identity whose signature is
|
|
452 |
* going to be verified.
|
|
453 |
*
|
|
454 |
* @exception InvalidKeyException if the public key in the certificate
|
|
455 |
* is not encoded properly or does not include required parameter
|
|
456 |
* information or cannot be used for digital signature purposes.
|
|
457 |
* @since 1.3
|
|
458 |
*/
|
|
459 |
public final void initVerify(Certificate certificate)
|
|
460 |
throws InvalidKeyException {
|
|
461 |
// If the certificate is of type X509Certificate,
|
|
462 |
// we should check whether it has a Key Usage
|
|
463 |
// extension marked as critical.
|
|
464 |
if (certificate instanceof java.security.cert.X509Certificate) {
|
|
465 |
// Check whether the cert has a key usage extension
|
|
466 |
// marked as a critical extension.
|
|
467 |
// The OID for KeyUsage extension is 2.5.29.15.
|
|
468 |
X509Certificate cert = (X509Certificate)certificate;
|
|
469 |
Set<String> critSet = cert.getCriticalExtensionOIDs();
|
|
470 |
|
|
471 |
if (critSet != null && !critSet.isEmpty()
|
|
472 |
&& critSet.contains("2.5.29.15")) {
|
|
473 |
boolean[] keyUsageInfo = cert.getKeyUsage();
|
|
474 |
// keyUsageInfo[0] is for digitalSignature.
|
|
475 |
if ((keyUsageInfo != null) && (keyUsageInfo[0] == false))
|
|
476 |
throw new InvalidKeyException("Wrong key usage");
|
|
477 |
}
|
|
478 |
}
|
|
479 |
|
|
480 |
PublicKey publicKey = certificate.getPublicKey();
|
|
481 |
engineInitVerify(publicKey);
|
|
482 |
state = VERIFY;
|
|
483 |
}
|
|
484 |
|
|
485 |
/**
|
|
486 |
* Initialize this object for signing. If this method is called
|
|
487 |
* again with a different argument, it negates the effect
|
|
488 |
* of this call.
|
|
489 |
*
|
|
490 |
* @param privateKey the private key of the identity whose signature
|
|
491 |
* is going to be generated.
|
|
492 |
*
|
|
493 |
* @exception InvalidKeyException if the key is invalid.
|
|
494 |
*/
|
|
495 |
public final void initSign(PrivateKey privateKey)
|
|
496 |
throws InvalidKeyException {
|
|
497 |
engineInitSign(privateKey);
|
|
498 |
state = SIGN;
|
|
499 |
}
|
|
500 |
|
|
501 |
/**
|
|
502 |
* Initialize this object for signing. If this method is called
|
|
503 |
* again with a different argument, it negates the effect
|
|
504 |
* of this call.
|
|
505 |
*
|
|
506 |
* @param privateKey the private key of the identity whose signature
|
|
507 |
* is going to be generated.
|
|
508 |
*
|
|
509 |
* @param random the source of randomness for this signature.
|
|
510 |
*
|
|
511 |
* @exception InvalidKeyException if the key is invalid.
|
|
512 |
*/
|
|
513 |
public final void initSign(PrivateKey privateKey, SecureRandom random)
|
|
514 |
throws InvalidKeyException {
|
|
515 |
engineInitSign(privateKey, random);
|
|
516 |
state = SIGN;
|
|
517 |
}
|
|
518 |
|
|
519 |
/**
|
|
520 |
* Returns the signature bytes of all the data updated.
|
|
521 |
* The format of the signature depends on the underlying
|
|
522 |
* signature scheme.
|
|
523 |
*
|
|
524 |
* <p>A call to this method resets this signature object to the state
|
|
525 |
* it was in when previously initialized for signing via a
|
|
526 |
* call to <code>initSign(PrivateKey)</code>. That is, the object is
|
|
527 |
* reset and available to generate another signature from the same
|
|
528 |
* signer, if desired, via new calls to <code>update</code> and
|
|
529 |
* <code>sign</code>.
|
|
530 |
*
|
|
531 |
* @return the signature bytes of the signing operation's result.
|
|
532 |
*
|
|
533 |
* @exception SignatureException if this signature object is not
|
|
534 |
* initialized properly or if this signature algorithm is unable to
|
|
535 |
* process the input data provided.
|
|
536 |
*/
|
|
537 |
public final byte[] sign() throws SignatureException {
|
|
538 |
if (state == SIGN) {
|
|
539 |
return engineSign();
|
|
540 |
}
|
|
541 |
throw new SignatureException("object not initialized for " +
|
|
542 |
"signing");
|
|
543 |
}
|
|
544 |
|
|
545 |
/**
|
|
546 |
* Finishes the signature operation and stores the resulting signature
|
|
547 |
* bytes in the provided buffer <code>outbuf</code>, starting at
|
|
548 |
* <code>offset</code>.
|
|
549 |
* The format of the signature depends on the underlying
|
|
550 |
* signature scheme.
|
|
551 |
*
|
|
552 |
* <p>This signature object is reset to its initial state (the state it
|
|
553 |
* was in after a call to one of the <code>initSign</code> methods) and
|
|
554 |
* can be reused to generate further signatures with the same private key.
|
|
555 |
*
|
|
556 |
* @param outbuf buffer for the signature result.
|
|
557 |
*
|
|
558 |
* @param offset offset into <code>outbuf</code> where the signature is
|
|
559 |
* stored.
|
|
560 |
*
|
|
561 |
* @param len number of bytes within <code>outbuf</code> allotted for the
|
|
562 |
* signature.
|
|
563 |
*
|
|
564 |
* @return the number of bytes placed into <code>outbuf</code>.
|
|
565 |
*
|
|
566 |
* @exception SignatureException if this signature object is not
|
|
567 |
* initialized properly, if this signature algorithm is unable to
|
|
568 |
* process the input data provided, or if <code>len</code> is less
|
|
569 |
* than the actual signature length.
|
|
570 |
*
|
|
571 |
* @since 1.2
|
|
572 |
*/
|
|
573 |
public final int sign(byte[] outbuf, int offset, int len)
|
|
574 |
throws SignatureException {
|
|
575 |
if (outbuf == null) {
|
|
576 |
throw new IllegalArgumentException("No output buffer given");
|
|
577 |
}
|
|
578 |
if (outbuf.length - offset < len) {
|
|
579 |
throw new IllegalArgumentException
|
|
580 |
("Output buffer too small for specified offset and length");
|
|
581 |
}
|
|
582 |
if (state != SIGN) {
|
|
583 |
throw new SignatureException("object not initialized for " +
|
|
584 |
"signing");
|
|
585 |
}
|
|
586 |
return engineSign(outbuf, offset, len);
|
|
587 |
}
|
|
588 |
|
|
589 |
/**
|
|
590 |
* Verifies the passed-in signature.
|
|
591 |
*
|
|
592 |
* <p>A call to this method resets this signature object to the state
|
|
593 |
* it was in when previously initialized for verification via a
|
|
594 |
* call to <code>initVerify(PublicKey)</code>. That is, the object is
|
|
595 |
* reset and available to verify another signature from the identity
|
|
596 |
* whose public key was specified in the call to <code>initVerify</code>.
|
|
597 |
*
|
|
598 |
* @param signature the signature bytes to be verified.
|
|
599 |
*
|
|
600 |
* @return true if the signature was verified, false if not.
|
|
601 |
*
|
|
602 |
* @exception SignatureException if this signature object is not
|
|
603 |
* initialized properly, the passed-in signature is improperly
|
|
604 |
* encoded or of the wrong type, if this signature algorithm is unable to
|
|
605 |
* process the input data provided, etc.
|
|
606 |
*/
|
|
607 |
public final boolean verify(byte[] signature) throws SignatureException {
|
|
608 |
if (state == VERIFY) {
|
|
609 |
return engineVerify(signature);
|
|
610 |
}
|
|
611 |
throw new SignatureException("object not initialized for " +
|
|
612 |
"verification");
|
|
613 |
}
|
|
614 |
|
|
615 |
/**
|
|
616 |
* Verifies the passed-in signature in the specified array
|
|
617 |
* of bytes, starting at the specified offset.
|
|
618 |
*
|
|
619 |
* <p>A call to this method resets this signature object to the state
|
|
620 |
* it was in when previously initialized for verification via a
|
|
621 |
* call to <code>initVerify(PublicKey)</code>. That is, the object is
|
|
622 |
* reset and available to verify another signature from the identity
|
|
623 |
* whose public key was specified in the call to <code>initVerify</code>.
|
|
624 |
*
|
|
625 |
*
|
|
626 |
* @param signature the signature bytes to be verified.
|
|
627 |
* @param offset the offset to start from in the array of bytes.
|
|
628 |
* @param length the number of bytes to use, starting at offset.
|
|
629 |
*
|
|
630 |
* @return true if the signature was verified, false if not.
|
|
631 |
*
|
|
632 |
* @exception SignatureException if this signature object is not
|
|
633 |
* initialized properly, the passed-in signature is improperly
|
|
634 |
* encoded or of the wrong type, if this signature algorithm is unable to
|
|
635 |
* process the input data provided, etc.
|
|
636 |
* @exception IllegalArgumentException if the <code>signature</code>
|
|
637 |
* byte array is null, or the <code>offset</code> or <code>length</code>
|
|
638 |
* is less than 0, or the sum of the <code>offset</code> and
|
|
639 |
* <code>length</code> is greater than the length of the
|
|
640 |
* <code>signature</code> byte array.
|
|
641 |
* @since 1.4
|
|
642 |
*/
|
|
643 |
public final boolean verify(byte[] signature, int offset, int length)
|
|
644 |
throws SignatureException {
|
|
645 |
if (state == VERIFY) {
|
|
646 |
if ((signature == null) || (offset < 0) || (length < 0) ||
|
|
647 |
(offset + length > signature.length)) {
|
|
648 |
throw new IllegalArgumentException("Bad arguments");
|
|
649 |
}
|
|
650 |
|
|
651 |
return engineVerify(signature, offset, length);
|
|
652 |
}
|
|
653 |
throw new SignatureException("object not initialized for " +
|
|
654 |
"verification");
|
|
655 |
}
|
|
656 |
|
|
657 |
/**
|
|
658 |
* Updates the data to be signed or verified by a byte.
|
|
659 |
*
|
|
660 |
* @param b the byte to use for the update.
|
|
661 |
*
|
|
662 |
* @exception SignatureException if this signature object is not
|
|
663 |
* initialized properly.
|
|
664 |
*/
|
|
665 |
public final void update(byte b) throws SignatureException {
|
|
666 |
if (state == VERIFY || state == SIGN) {
|
|
667 |
engineUpdate(b);
|
|
668 |
} else {
|
|
669 |
throw new SignatureException("object not initialized for "
|
|
670 |
+ "signature or verification");
|
|
671 |
}
|
|
672 |
}
|
|
673 |
|
|
674 |
/**
|
|
675 |
* Updates the data to be signed or verified, using the specified
|
|
676 |
* array of bytes.
|
|
677 |
*
|
|
678 |
* @param data the byte array to use for the update.
|
|
679 |
*
|
|
680 |
* @exception SignatureException if this signature object is not
|
|
681 |
* initialized properly.
|
|
682 |
*/
|
|
683 |
public final void update(byte[] data) throws SignatureException {
|
|
684 |
update(data, 0, data.length);
|
|
685 |
}
|
|
686 |
|
|
687 |
/**
|
|
688 |
* Updates the data to be signed or verified, using the specified
|
|
689 |
* array of bytes, starting at the specified offset.
|
|
690 |
*
|
|
691 |
* @param data the array of bytes.
|
|
692 |
* @param off the offset to start from in the array of bytes.
|
|
693 |
* @param len the number of bytes to use, starting at offset.
|
|
694 |
*
|
|
695 |
* @exception SignatureException if this signature object is not
|
|
696 |
* initialized properly.
|
|
697 |
*/
|
|
698 |
public final void update(byte[] data, int off, int len)
|
|
699 |
throws SignatureException {
|
|
700 |
if (state == SIGN || state == VERIFY) {
|
|
701 |
engineUpdate(data, off, len);
|
|
702 |
} else {
|
|
703 |
throw new SignatureException("object not initialized for "
|
|
704 |
+ "signature or verification");
|
|
705 |
}
|
|
706 |
}
|
|
707 |
|
|
708 |
/**
|
|
709 |
* Updates the data to be signed or verified using the specified
|
|
710 |
* ByteBuffer. Processes the <code>data.remaining()</code> bytes
|
|
711 |
* starting at at <code>data.position()</code>.
|
|
712 |
* Upon return, the buffer's position will be equal to its limit;
|
|
713 |
* its limit will not have changed.
|
|
714 |
*
|
|
715 |
* @param data the ByteBuffer
|
|
716 |
*
|
|
717 |
* @exception SignatureException if this signature object is not
|
|
718 |
* initialized properly.
|
|
719 |
* @since 1.5
|
|
720 |
*/
|
|
721 |
public final void update(ByteBuffer data) throws SignatureException {
|
|
722 |
if ((state != SIGN) && (state != VERIFY)) {
|
|
723 |
throw new SignatureException("object not initialized for "
|
|
724 |
+ "signature or verification");
|
|
725 |
}
|
|
726 |
if (data == null) {
|
|
727 |
throw new NullPointerException();
|
|
728 |
}
|
|
729 |
engineUpdate(data);
|
|
730 |
}
|
|
731 |
|
|
732 |
/**
|
|
733 |
* Returns the name of the algorithm for this signature object.
|
|
734 |
*
|
|
735 |
* @return the name of the algorithm for this signature object.
|
|
736 |
*/
|
|
737 |
public final String getAlgorithm() {
|
|
738 |
return this.algorithm;
|
|
739 |
}
|
|
740 |
|
|
741 |
/**
|
|
742 |
* Returns a string representation of this signature object,
|
|
743 |
* providing information that includes the state of the object
|
|
744 |
* and the name of the algorithm used.
|
|
745 |
*
|
|
746 |
* @return a string representation of this signature object.
|
|
747 |
*/
|
|
748 |
public String toString() {
|
|
749 |
String initState = "";
|
|
750 |
switch (state) {
|
|
751 |
case UNINITIALIZED:
|
|
752 |
initState = "<not initialized>";
|
|
753 |
break;
|
|
754 |
case VERIFY:
|
|
755 |
initState = "<initialized for verifying>";
|
|
756 |
break;
|
|
757 |
case SIGN:
|
|
758 |
initState = "<initialized for signing>";
|
|
759 |
break;
|
|
760 |
}
|
|
761 |
return "Signature object: " + getAlgorithm() + initState;
|
|
762 |
}
|
|
763 |
|
|
764 |
/**
|
|
765 |
* Sets the specified algorithm parameter to the specified value.
|
|
766 |
* This method supplies a general-purpose mechanism through
|
|
767 |
* which it is possible to set the various parameters of this object.
|
|
768 |
* A parameter may be any settable parameter for the algorithm, such as
|
|
769 |
* a parameter size, or a source of random bits for signature generation
|
|
770 |
* (if appropriate), or an indication of whether or not to perform
|
|
771 |
* a specific but optional computation. A uniform algorithm-specific
|
|
772 |
* naming scheme for each parameter is desirable but left unspecified
|
|
773 |
* at this time.
|
|
774 |
*
|
|
775 |
* @param param the string identifier of the parameter.
|
|
776 |
* @param value the parameter value.
|
|
777 |
*
|
|
778 |
* @exception InvalidParameterException if <code>param</code> is an
|
|
779 |
* invalid parameter for this signature algorithm engine,
|
|
780 |
* the parameter is already set
|
|
781 |
* and cannot be set again, a security exception occurs, and so on.
|
|
782 |
*
|
|
783 |
* @see #getParameter
|
|
784 |
*
|
|
785 |
* @deprecated Use
|
|
786 |
* {@link #setParameter(java.security.spec.AlgorithmParameterSpec)
|
|
787 |
* setParameter}.
|
|
788 |
*/
|
|
789 |
@Deprecated
|
|
790 |
public final void setParameter(String param, Object value)
|
|
791 |
throws InvalidParameterException {
|
|
792 |
engineSetParameter(param, value);
|
|
793 |
}
|
|
794 |
|
|
795 |
/**
|
|
796 |
* Initializes this signature engine with the specified parameter set.
|
|
797 |
*
|
|
798 |
* @param params the parameters
|
|
799 |
*
|
|
800 |
* @exception InvalidAlgorithmParameterException if the given parameters
|
|
801 |
* are inappropriate for this signature engine
|
|
802 |
*
|
|
803 |
* @see #getParameters
|
|
804 |
*/
|
|
805 |
public final void setParameter(AlgorithmParameterSpec params)
|
|
806 |
throws InvalidAlgorithmParameterException {
|
|
807 |
engineSetParameter(params);
|
|
808 |
}
|
|
809 |
|
|
810 |
/**
|
|
811 |
* Returns the parameters used with this signature object.
|
|
812 |
*
|
|
813 |
* <p>The returned parameters may be the same that were used to initialize
|
|
814 |
* this signature, or may contain a combination of default and randomly
|
|
815 |
* generated parameter values used by the underlying signature
|
|
816 |
* implementation if this signature requires algorithm parameters but
|
|
817 |
* was not initialized with any.
|
|
818 |
*
|
|
819 |
* @return the parameters used with this signature, or null if this
|
|
820 |
* signature does not use any parameters.
|
|
821 |
*
|
|
822 |
* @see #setParameter(AlgorithmParameterSpec)
|
|
823 |
* @since 1.4
|
|
824 |
*/
|
|
825 |
public final AlgorithmParameters getParameters() {
|
|
826 |
return engineGetParameters();
|
|
827 |
}
|
|
828 |
|
|
829 |
/**
|
|
830 |
* Gets the value of the specified algorithm parameter. This method
|
|
831 |
* supplies a general-purpose mechanism through which it is possible to
|
|
832 |
* get the various parameters of this object. A parameter may be any
|
|
833 |
* settable parameter for the algorithm, such as a parameter size, or
|
|
834 |
* a source of random bits for signature generation (if appropriate),
|
|
835 |
* or an indication of whether or not to perform a specific but optional
|
|
836 |
* computation. A uniform algorithm-specific naming scheme for each
|
|
837 |
* parameter is desirable but left unspecified at this time.
|
|
838 |
*
|
|
839 |
* @param param the string name of the parameter.
|
|
840 |
*
|
|
841 |
* @return the object that represents the parameter value, or null if
|
|
842 |
* there is none.
|
|
843 |
*
|
|
844 |
* @exception InvalidParameterException if <code>param</code> is an invalid
|
|
845 |
* parameter for this engine, or another exception occurs while
|
|
846 |
* trying to get this parameter.
|
|
847 |
*
|
|
848 |
* @see #setParameter(String, Object)
|
|
849 |
*
|
|
850 |
* @deprecated
|
|
851 |
*/
|
|
852 |
@Deprecated
|
|
853 |
public final Object getParameter(String param)
|
|
854 |
throws InvalidParameterException {
|
|
855 |
return engineGetParameter(param);
|
|
856 |
}
|
|
857 |
|
|
858 |
/**
|
|
859 |
* Returns a clone if the implementation is cloneable.
|
|
860 |
*
|
|
861 |
* @return a clone if the implementation is cloneable.
|
|
862 |
*
|
|
863 |
* @exception CloneNotSupportedException if this is called
|
|
864 |
* on an implementation that does not support <code>Cloneable</code>.
|
|
865 |
*/
|
|
866 |
public Object clone() throws CloneNotSupportedException {
|
|
867 |
if (this instanceof Cloneable) {
|
|
868 |
return super.clone();
|
|
869 |
} else {
|
|
870 |
throw new CloneNotSupportedException();
|
|
871 |
}
|
|
872 |
}
|
|
873 |
|
|
874 |
/*
|
|
875 |
* The following class allows providers to extend from SignatureSpi
|
|
876 |
* rather than from Signature. It represents a Signature with an
|
|
877 |
* encapsulated, provider-supplied SPI object (of type SignatureSpi).
|
|
878 |
* If the provider implementation is an instance of SignatureSpi, the
|
|
879 |
* getInstance() methods above return an instance of this class, with
|
|
880 |
* the SPI object encapsulated.
|
|
881 |
*
|
|
882 |
* Note: All SPI methods from the original Signature class have been
|
|
883 |
* moved up the hierarchy into a new class (SignatureSpi), which has
|
|
884 |
* been interposed in the hierarchy between the API (Signature)
|
|
885 |
* and its original parent (Object).
|
|
886 |
*/
|
|
887 |
|
|
888 |
private static class Delegate extends Signature {
|
|
889 |
|
|
890 |
// The provider implementation (delegate)
|
|
891 |
// filled in once the provider is selected
|
|
892 |
private SignatureSpi sigSpi;
|
|
893 |
|
|
894 |
// lock for mutex during provider selection
|
|
895 |
private final Object lock;
|
|
896 |
|
|
897 |
// next service to try in provider selection
|
|
898 |
// null once provider is selected
|
|
899 |
private Service firstService;
|
|
900 |
|
|
901 |
// remaining services to try in provider selection
|
|
902 |
// null once provider is selected
|
|
903 |
private Iterator<Service> serviceIterator;
|
|
904 |
|
|
905 |
// constructor
|
|
906 |
Delegate(SignatureSpi sigSpi, String algorithm) {
|
|
907 |
super(algorithm);
|
|
908 |
this.sigSpi = sigSpi;
|
|
909 |
this.lock = null; // no lock needed
|
|
910 |
}
|
|
911 |
|
|
912 |
// used with delayed provider selection
|
|
913 |
Delegate(Service service,
|
|
914 |
Iterator<Service> iterator, String algorithm) {
|
|
915 |
super(algorithm);
|
|
916 |
this.firstService = service;
|
|
917 |
this.serviceIterator = iterator;
|
|
918 |
this.lock = new Object();
|
|
919 |
}
|
|
920 |
|
|
921 |
/**
|
|
922 |
* Returns a clone if the delegate is cloneable.
|
|
923 |
*
|
|
924 |
* @return a clone if the delegate is cloneable.
|
|
925 |
*
|
|
926 |
* @exception CloneNotSupportedException if this is called on a
|
|
927 |
* delegate that does not support <code>Cloneable</code>.
|
|
928 |
*/
|
|
929 |
public Object clone() throws CloneNotSupportedException {
|
|
930 |
chooseFirstProvider();
|
|
931 |
if (sigSpi instanceof Cloneable) {
|
|
932 |
SignatureSpi sigSpiClone = (SignatureSpi)sigSpi.clone();
|
|
933 |
// Because 'algorithm' and 'provider' are private
|
|
934 |
// members of our supertype, we must perform a cast to
|
|
935 |
// access them.
|
|
936 |
Signature that =
|
|
937 |
new Delegate(sigSpiClone, ((Signature)this).algorithm);
|
|
938 |
that.provider = ((Signature)this).provider;
|
|
939 |
return that;
|
|
940 |
} else {
|
|
941 |
throw new CloneNotSupportedException();
|
|
942 |
}
|
|
943 |
}
|
|
944 |
|
|
945 |
private static SignatureSpi newInstance(Service s)
|
|
946 |
throws NoSuchAlgorithmException {
|
|
947 |
if (s.getType().equals("Cipher")) {
|
|
948 |
// must be NONEwithRSA
|
|
949 |
try {
|
|
950 |
Cipher c = Cipher.getInstance(RSA_CIPHER, s.getProvider());
|
|
951 |
return new CipherAdapter(c);
|
|
952 |
} catch (NoSuchPaddingException e) {
|
|
953 |
throw new NoSuchAlgorithmException(e);
|
|
954 |
}
|
|
955 |
} else {
|
|
956 |
Object o = s.newInstance(null);
|
|
957 |
if (o instanceof SignatureSpi == false) {
|
|
958 |
throw new NoSuchAlgorithmException
|
|
959 |
("Not a SignatureSpi: " + o.getClass().getName());
|
|
960 |
}
|
|
961 |
return (SignatureSpi)o;
|
|
962 |
}
|
|
963 |
}
|
|
964 |
|
|
965 |
// max number of debug warnings to print from chooseFirstProvider()
|
|
966 |
private static int warnCount = 10;
|
|
967 |
|
|
968 |
/**
|
|
969 |
* Choose the Spi from the first provider available. Used if
|
|
970 |
* delayed provider selection is not possible because initSign()/
|
|
971 |
* initVerify() is not the first method called.
|
|
972 |
*/
|
|
973 |
void chooseFirstProvider() {
|
|
974 |
if (sigSpi != null) {
|
|
975 |
return;
|
|
976 |
}
|
|
977 |
synchronized (lock) {
|
|
978 |
if (sigSpi != null) {
|
|
979 |
return;
|
|
980 |
}
|
|
981 |
if (debug != null) {
|
|
982 |
int w = --warnCount;
|
|
983 |
if (w >= 0) {
|
|
984 |
debug.println("Signature.init() not first method "
|
|
985 |
+ "called, disabling delayed provider selection");
|
|
986 |
if (w == 0) {
|
|
987 |
debug.println("Further warnings of this type will "
|
|
988 |
+ "be suppressed");
|
|
989 |
}
|
|
990 |
new Exception("Call trace").printStackTrace();
|
|
991 |
}
|
|
992 |
}
|
|
993 |
Exception lastException = null;
|
|
994 |
while ((firstService != null) || serviceIterator.hasNext()) {
|
|
995 |
Service s;
|
|
996 |
if (firstService != null) {
|
|
997 |
s = firstService;
|
|
998 |
firstService = null;
|
|
999 |
} else {
|
|
1000 |
s = serviceIterator.next();
|
|
1001 |
}
|
|
1002 |
if (isSpi(s) == false) {
|
|
1003 |
continue;
|
|
1004 |
}
|
|
1005 |
try {
|
|
1006 |
sigSpi = newInstance(s);
|
|
1007 |
provider = s.getProvider();
|
|
1008 |
// not needed any more
|
|
1009 |
firstService = null;
|
|
1010 |
serviceIterator = null;
|
|
1011 |
return;
|
|
1012 |
} catch (NoSuchAlgorithmException e) {
|
|
1013 |
lastException = e;
|
|
1014 |
}
|
|
1015 |
}
|
|
1016 |
ProviderException e = new ProviderException
|
|
1017 |
("Could not construct SignatureSpi instance");
|
|
1018 |
if (lastException != null) {
|
|
1019 |
e.initCause(lastException);
|
|
1020 |
}
|
|
1021 |
throw e;
|
|
1022 |
}
|
|
1023 |
}
|
|
1024 |
|
|
1025 |
private void chooseProvider(int type, Key key, SecureRandom random)
|
|
1026 |
throws InvalidKeyException {
|
|
1027 |
synchronized (lock) {
|
|
1028 |
if (sigSpi != null) {
|
|
1029 |
init(sigSpi, type, key, random);
|
|
1030 |
return;
|
|
1031 |
}
|
|
1032 |
Exception lastException = null;
|
|
1033 |
while ((firstService != null) || serviceIterator.hasNext()) {
|
|
1034 |
Service s;
|
|
1035 |
if (firstService != null) {
|
|
1036 |
s = firstService;
|
|
1037 |
firstService = null;
|
|
1038 |
} else {
|
|
1039 |
s = serviceIterator.next();
|
|
1040 |
}
|
|
1041 |
// if provider says it does not support this key, ignore it
|
|
1042 |
if (s.supportsParameter(key) == false) {
|
|
1043 |
continue;
|
|
1044 |
}
|
|
1045 |
// if instance is not a SignatureSpi, ignore it
|
|
1046 |
if (isSpi(s) == false) {
|
|
1047 |
continue;
|
|
1048 |
}
|
|
1049 |
try {
|
|
1050 |
SignatureSpi spi = newInstance(s);
|
|
1051 |
init(spi, type, key, random);
|
|
1052 |
provider = s.getProvider();
|
|
1053 |
sigSpi = spi;
|
|
1054 |
firstService = null;
|
|
1055 |
serviceIterator = null;
|
|
1056 |
return;
|
|
1057 |
} catch (Exception e) {
|
|
1058 |
// NoSuchAlgorithmException from newInstance()
|
|
1059 |
// InvalidKeyException from init()
|
|
1060 |
// RuntimeException (ProviderException) from init()
|
|
1061 |
if (lastException == null) {
|
|
1062 |
lastException = e;
|
|
1063 |
}
|
|
1064 |
}
|
|
1065 |
}
|
|
1066 |
// no working provider found, fail
|
|
1067 |
if (lastException instanceof InvalidKeyException) {
|
|
1068 |
throw (InvalidKeyException)lastException;
|
|
1069 |
}
|
|
1070 |
if (lastException instanceof RuntimeException) {
|
|
1071 |
throw (RuntimeException)lastException;
|
|
1072 |
}
|
|
1073 |
String k = (key != null) ? key.getClass().getName() : "(null)";
|
|
1074 |
throw new InvalidKeyException
|
|
1075 |
("No installed provider supports this key: "
|
|
1076 |
+ k, lastException);
|
|
1077 |
}
|
|
1078 |
}
|
|
1079 |
|
|
1080 |
private final static int I_PUB = 1;
|
|
1081 |
private final static int I_PRIV = 2;
|
|
1082 |
private final static int I_PRIV_SR = 3;
|
|
1083 |
|
|
1084 |
private void init(SignatureSpi spi, int type, Key key,
|
|
1085 |
SecureRandom random) throws InvalidKeyException {
|
|
1086 |
switch (type) {
|
|
1087 |
case I_PUB:
|
|
1088 |
spi.engineInitVerify((PublicKey)key);
|
|
1089 |
break;
|
|
1090 |
case I_PRIV:
|
|
1091 |
spi.engineInitSign((PrivateKey)key);
|
|
1092 |
break;
|
|
1093 |
case I_PRIV_SR:
|
|
1094 |
spi.engineInitSign((PrivateKey)key, random);
|
|
1095 |
break;
|
|
1096 |
default:
|
|
1097 |
throw new AssertionError("Internal error: " + type);
|
|
1098 |
}
|
|
1099 |
}
|
|
1100 |
|
|
1101 |
protected void engineInitVerify(PublicKey publicKey)
|
|
1102 |
throws InvalidKeyException {
|
|
1103 |
if (sigSpi != null) {
|
|
1104 |
sigSpi.engineInitVerify(publicKey);
|
|
1105 |
} else {
|
|
1106 |
chooseProvider(I_PUB, publicKey, null);
|
|
1107 |
}
|
|
1108 |
}
|
|
1109 |
|
|
1110 |
protected void engineInitSign(PrivateKey privateKey)
|
|
1111 |
throws InvalidKeyException {
|
|
1112 |
if (sigSpi != null) {
|
|
1113 |
sigSpi.engineInitSign(privateKey);
|
|
1114 |
} else {
|
|
1115 |
chooseProvider(I_PRIV, privateKey, null);
|
|
1116 |
}
|
|
1117 |
}
|
|
1118 |
|
|
1119 |
protected void engineInitSign(PrivateKey privateKey, SecureRandom sr)
|
|
1120 |
throws InvalidKeyException {
|
|
1121 |
if (sigSpi != null) {
|
|
1122 |
sigSpi.engineInitSign(privateKey, sr);
|
|
1123 |
} else {
|
|
1124 |
chooseProvider(I_PRIV_SR, privateKey, sr);
|
|
1125 |
}
|
|
1126 |
}
|
|
1127 |
|
|
1128 |
protected void engineUpdate(byte b) throws SignatureException {
|
|
1129 |
chooseFirstProvider();
|
|
1130 |
sigSpi.engineUpdate(b);
|
|
1131 |
}
|
|
1132 |
|
|
1133 |
protected void engineUpdate(byte[] b, int off, int len)
|
|
1134 |
throws SignatureException {
|
|
1135 |
chooseFirstProvider();
|
|
1136 |
sigSpi.engineUpdate(b, off, len);
|
|
1137 |
}
|
|
1138 |
|
|
1139 |
protected void engineUpdate(ByteBuffer data) {
|
|
1140 |
chooseFirstProvider();
|
|
1141 |
sigSpi.engineUpdate(data);
|
|
1142 |
}
|
|
1143 |
|
|
1144 |
protected byte[] engineSign() throws SignatureException {
|
|
1145 |
chooseFirstProvider();
|
|
1146 |
return sigSpi.engineSign();
|
|
1147 |
}
|
|
1148 |
|
|
1149 |
protected int engineSign(byte[] outbuf, int offset, int len)
|
|
1150 |
throws SignatureException {
|
|
1151 |
chooseFirstProvider();
|
|
1152 |
return sigSpi.engineSign(outbuf, offset, len);
|
|
1153 |
}
|
|
1154 |
|
|
1155 |
protected boolean engineVerify(byte[] sigBytes)
|
|
1156 |
throws SignatureException {
|
|
1157 |
chooseFirstProvider();
|
|
1158 |
return sigSpi.engineVerify(sigBytes);
|
|
1159 |
}
|
|
1160 |
|
|
1161 |
protected boolean engineVerify(byte[] sigBytes, int offset, int length)
|
|
1162 |
throws SignatureException {
|
|
1163 |
chooseFirstProvider();
|
|
1164 |
return sigSpi.engineVerify(sigBytes, offset, length);
|
|
1165 |
}
|
|
1166 |
|
|
1167 |
protected void engineSetParameter(String param, Object value)
|
|
1168 |
throws InvalidParameterException {
|
|
1169 |
chooseFirstProvider();
|
|
1170 |
sigSpi.engineSetParameter(param, value);
|
|
1171 |
}
|
|
1172 |
|
|
1173 |
protected void engineSetParameter(AlgorithmParameterSpec params)
|
|
1174 |
throws InvalidAlgorithmParameterException {
|
|
1175 |
chooseFirstProvider();
|
|
1176 |
sigSpi.engineSetParameter(params);
|
|
1177 |
}
|
|
1178 |
|
|
1179 |
protected Object engineGetParameter(String param)
|
|
1180 |
throws InvalidParameterException {
|
|
1181 |
chooseFirstProvider();
|
|
1182 |
return sigSpi.engineGetParameter(param);
|
|
1183 |
}
|
|
1184 |
|
|
1185 |
protected AlgorithmParameters engineGetParameters() {
|
|
1186 |
chooseFirstProvider();
|
|
1187 |
return sigSpi.engineGetParameters();
|
|
1188 |
}
|
|
1189 |
}
|
|
1190 |
|
|
1191 |
// adapter for RSA/ECB/PKCS1Padding ciphers
|
|
1192 |
private static class CipherAdapter extends SignatureSpi {
|
|
1193 |
|
|
1194 |
private final Cipher cipher;
|
|
1195 |
|
|
1196 |
private ByteArrayOutputStream data;
|
|
1197 |
|
|
1198 |
CipherAdapter(Cipher cipher) {
|
|
1199 |
this.cipher = cipher;
|
|
1200 |
}
|
|
1201 |
|
|
1202 |
protected void engineInitVerify(PublicKey publicKey)
|
|
1203 |
throws InvalidKeyException {
|
|
1204 |
cipher.init(Cipher.DECRYPT_MODE, publicKey);
|
|
1205 |
if (data == null) {
|
|
1206 |
data = new ByteArrayOutputStream(128);
|
|
1207 |
} else {
|
|
1208 |
data.reset();
|
|
1209 |
}
|
|
1210 |
}
|
|
1211 |
|
|
1212 |
protected void engineInitSign(PrivateKey privateKey)
|
|
1213 |
throws InvalidKeyException {
|
|
1214 |
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
|
|
1215 |
data = null;
|
|
1216 |
}
|
|
1217 |
|
|
1218 |
protected void engineInitSign(PrivateKey privateKey,
|
|
1219 |
SecureRandom random) throws InvalidKeyException {
|
|
1220 |
cipher.init(Cipher.ENCRYPT_MODE, privateKey, random);
|
|
1221 |
data = null;
|
|
1222 |
}
|
|
1223 |
|
|
1224 |
protected void engineUpdate(byte b) throws SignatureException {
|
|
1225 |
engineUpdate(new byte[] {b}, 0, 1);
|
|
1226 |
}
|
|
1227 |
|
|
1228 |
protected void engineUpdate(byte[] b, int off, int len)
|
|
1229 |
throws SignatureException {
|
|
1230 |
if (data != null) {
|
|
1231 |
data.write(b, off, len);
|
|
1232 |
return;
|
|
1233 |
}
|
|
1234 |
byte[] out = cipher.update(b, off, len);
|
|
1235 |
if ((out != null) && (out.length != 0)) {
|
|
1236 |
throw new SignatureException
|
|
1237 |
("Cipher unexpectedly returned data");
|
|
1238 |
}
|
|
1239 |
}
|
|
1240 |
|
|
1241 |
protected byte[] engineSign() throws SignatureException {
|
|
1242 |
try {
|
|
1243 |
return cipher.doFinal();
|
|
1244 |
} catch (IllegalBlockSizeException e) {
|
|
1245 |
throw new SignatureException("doFinal() failed", e);
|
|
1246 |
} catch (BadPaddingException e) {
|
|
1247 |
throw new SignatureException("doFinal() failed", e);
|
|
1248 |
}
|
|
1249 |
}
|
|
1250 |
|
|
1251 |
protected boolean engineVerify(byte[] sigBytes)
|
|
1252 |
throws SignatureException {
|
|
1253 |
try {
|
|
1254 |
byte[] out = cipher.doFinal(sigBytes);
|
|
1255 |
byte[] dataBytes = data.toByteArray();
|
|
1256 |
data.reset();
|
|
1257 |
return Arrays.equals(out, dataBytes);
|
|
1258 |
} catch (BadPaddingException e) {
|
|
1259 |
// e.g. wrong public key used
|
|
1260 |
// return false rather than throwing exception
|
|
1261 |
return false;
|
|
1262 |
} catch (IllegalBlockSizeException e) {
|
|
1263 |
throw new SignatureException("doFinal() failed", e);
|
|
1264 |
}
|
|
1265 |
}
|
|
1266 |
|
|
1267 |
protected void engineSetParameter(String param, Object value)
|
|
1268 |
throws InvalidParameterException {
|
|
1269 |
throw new InvalidParameterException("Parameters not supported");
|
|
1270 |
}
|
|
1271 |
|
|
1272 |
protected Object engineGetParameter(String param)
|
|
1273 |
throws InvalidParameterException {
|
|
1274 |
throw new InvalidParameterException("Parameters not supported");
|
|
1275 |
}
|
|
1276 |
|
|
1277 |
}
|
|
1278 |
|
|
1279 |
}
|