1 /* 2 * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.security.ec; 27 28 import java.util.*; 29 import java.security.*; 30 import sun.security.action.PutAllAction; 31 32 /** 33 * Provider class for the Elliptic Curve provider. 34 * Supports EC keypair and parameter generation, ECDSA signing and 35 * ECDH key agreement. 36 * 37 * IMPLEMENTATION NOTE: 38 * The Java classes in this provider access a native ECC implementation 39 * via JNI to a C++ wrapper class which in turn calls C functions. 40 * The Java classes are packaged into the jdk.crypto.sunec module and the 41 * C++ and C functions are packaged into libsunec.so or sunec.dll in the 42 * JRE native libraries directory. If the native library is not present 43 * then this provider is registered with support for fewer ECC algorithms 44 * (KeyPairGenerator, Signature and KeyAgreement are omitted). 45 * 46 * @since 1.7 47 */ 48 public final class SunEC extends Provider { 49 50 private static final long serialVersionUID = -2279741672933606418L; 51 52 // flag indicating whether the full EC implementation is present 53 // (when native library is absent then fewer EC algorithms are available) 54 private static boolean useFullImplementation = true; 55 static { 56 try { 57 AccessController.doPrivileged(new PrivilegedAction<Void>() { 58 public Void run() { 59 System.loadLibrary("sunec"); // check for native library 60 return null; 61 } 62 }); 63 } catch (UnsatisfiedLinkError e) { 64 useFullImplementation = false; 65 } 66 } 67 68 public SunEC() { 69 super("SunEC", 1.9d, "Sun Elliptic Curve provider (EC, ECDSA, ECDH)"); 70 71 // if there is no security manager installed, put directly into 72 // the provider. Otherwise, create a temporary map and use a 73 // doPrivileged() call at the end to transfer the contents 74 if (System.getSecurityManager() == null) { 75 SunECEntries.putEntries(this, useFullImplementation); 76 } else { 77 Map<Object, Object> map = new HashMap<Object, Object>(); 78 SunECEntries.putEntries(map, useFullImplementation); 79 AccessController.doPrivileged(new PutAllAction(this, map)); 80 } 81 } 82 83 }