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 signed sunec.jar in the JRE 41 * extensions directory and the C++ and C functions are packaged into 42 * libsunec.so or sunec.dll in the JRE native libraries directory. 43 * If the native library is not present then this provider is registered 44 * with support for fewer ECC algorithms (KeyPairGenerator, Signature and 45 * KeyAgreement are omitted). 46 * 47 * @since 1.7 48 */ 49 public final class SunEC extends Provider { 50 51 private static final long serialVersionUID = -2279741672933606418L; 52 53 // flag indicating whether the full EC implementation is present 54 // (when native library is absent then fewer EC algorithms are available) 55 private static boolean useFullImplementation = true; 56 static { 57 try { 58 AccessController.doPrivileged(new PrivilegedAction<Void>() { 59 public Void run() { 60 System.loadLibrary("sunec"); // check for native library 61 return null; 62 } 63 }); 64 } catch (UnsatisfiedLinkError e) { 65 useFullImplementation = false; 66 } 67 } 68 69 public SunEC() { 70 super("SunEC", 1.9d, "Sun Elliptic Curve provider (EC, ECDSA, ECDH)"); 71 72 // if there is no security manager installed, put directly into 73 // the provider. Otherwise, create a temporary map and use a 74 // doPrivileged() call at the end to transfer the contents 75 if (System.getSecurityManager() == null) { 76 SunECEntries.putEntries(this, useFullImplementation); 77 } else { 78 Map<Object, Object> map = new HashMap<Object, Object>(); 79 SunECEntries.putEntries(map, useFullImplementation); 80 AccessController.doPrivileged(new PutAllAction(this, map)); 81 } 82 } 83 84 }