1 /*
   2  * Copyright (c) 2016, 2018, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package org.graalvm.compiler.hotspot.replacements;
  26 
  27 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfigBase.INJECTED_METAACCESS;
  28 import static org.graalvm.compiler.serviceprovider.GraalServices.Java8OrEarlier;
  29 
  30 import org.graalvm.compiler.api.replacements.ClassSubstitution;
  31 import org.graalvm.compiler.api.replacements.MethodSubstitution;
  32 import org.graalvm.compiler.debug.GraalError;
  33 import org.graalvm.compiler.hotspot.HotSpotBackend;
  34 import org.graalvm.compiler.nodes.ComputeObjectAddressNode;
  35 import org.graalvm.compiler.nodes.PiNode;
  36 import org.graalvm.compiler.nodes.extended.RawLoadNode;
  37 import org.graalvm.compiler.replacements.ReplacementsUtil;
  38 import org.graalvm.compiler.word.Word;
  39 import jdk.internal.vm.compiler.word.LocationIdentity;
  40 import jdk.internal.vm.compiler.word.WordFactory;
  41 
  42 import jdk.vm.ci.meta.JavaKind;
  43 
  44 @ClassSubstitution(className = "sun.security.provider.SHA5", optional = true)
  45 public class SHA5Substitutions {
  46 
  47     static final long stateOffset;
  48 
  49     static final Class<?> shaClass;
  50 
  51     public static final String implCompressName = Java8OrEarlier ? "implCompress" : "implCompress0";
  52 
  53     static {
  54         try {
  55             // Need to use the system class loader as com.sun.crypto.provider.AESCrypt
  56             // is normally loaded by the extension class loader which is not delegated
  57             // to by the JVMCI class loader.
  58             ClassLoader cl = ClassLoader.getSystemClassLoader();
  59             shaClass = Class.forName("sun.security.provider.SHA5", true, cl);
  60             stateOffset = UnsafeAccess.UNSAFE.objectFieldOffset(shaClass.getDeclaredField("state"));
  61         } catch (Exception ex) {
  62             throw new GraalError(ex);
  63         }
  64     }
  65 
  66     @MethodSubstitution(isStatic = false)
  67     static void implCompress0(Object receiver, byte[] buf, int ofs) {
  68         Object realReceiver = PiNode.piCastNonNull(receiver, shaClass);
  69         Object state = RawLoadNode.load(realReceiver, stateOffset, JavaKind.Object, LocationIdentity.any());
  70         Word bufAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(buf, ReplacementsUtil.getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Byte) + ofs));
  71         Word stateAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(state, ReplacementsUtil.getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Int)));
  72         HotSpotBackend.sha5ImplCompressStub(bufAddr, stateAddr);
  73     }
  74 }