/*
* Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
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*
* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package sun.security.ec;
import java.util.*;
import java.security.*;
import sun.security.action.PutAllAction;
/**
* Provider class for the Elliptic Curve provider.
* Supports EC keypair and parameter generation, ECDSA signing and
* ECDH key agreement.
*
* IMPLEMENTATION NOTE:
* The Java classes in this provider access a native ECC implementation
* via JNI to a C++ wrapper class which in turn calls C functions.
* The Java classes are packaged into the signed sunec.jar in the JRE
* extensions directory and the C++ and C functions are packaged into
* libsunec.so or sunec.dll in the JRE native libraries directory.
* If the native library is not present then this provider is registered
* with support for fewer ECC algorithms (KeyPairGenerator, Signature and
* KeyAgreement are omitted).
*
* @since 1.7
*/
public final class SunEC extends Provider {
private static final long serialVersionUID = -2279741672933606418L;
// flag indicating whether the full EC implementation is present
// (when native library is absent then fewer EC algorithms are available)
private static boolean useFullImplementation = true;
static {
try {
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
System.loadLibrary("sunec"); // check for native library
return null;
}
});
} catch (UnsatisfiedLinkError e) {
useFullImplementation = false;
}
}
public SunEC() {
super("SunEC", 1.7d, "Sun Elliptic Curve provider (EC, ECDSA, ECDH)");
// if there is no security manager installed, put directly into
// the provider. Otherwise, create a temporary map and use a
// doPrivileged() call at the end to transfer the contents
if (System.getSecurityManager() == null) {
SunECEntries.putEntries(this, useFullImplementation);
} else {
Map<Object, Object> map = new HashMap<Object, Object>();
SunECEntries.putEntries(map, useFullImplementation);
AccessController.doPrivileged(new PutAllAction(this, map));
}
}
}