1 /*
2 * Copyright (c) 2012, 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.hotspot.HotSpotBackend.DECRYPT_BLOCK;
29 import static org.graalvm.compiler.hotspot.HotSpotBackend.DECRYPT_BLOCK_WITH_ORIGINAL_KEY;
30 import static org.graalvm.compiler.hotspot.HotSpotBackend.ENCRYPT_BLOCK;
31 import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.VERY_SLOW_PATH_PROBABILITY;
32 import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.probability;
33 import static org.graalvm.compiler.replacements.ReplacementsUtil.getArrayBaseOffset;
34
35 import org.graalvm.compiler.api.replacements.ClassSubstitution;
36 import org.graalvm.compiler.api.replacements.MethodSubstitution;
37 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
38 import org.graalvm.compiler.debug.GraalError;
39 import org.graalvm.compiler.graph.Node.ConstantNodeParameter;
40 import org.graalvm.compiler.graph.Node.NodeIntrinsic;
41 import org.graalvm.compiler.nodes.ComputeObjectAddressNode;
42 import org.graalvm.compiler.nodes.DeoptimizeNode;
43 import org.graalvm.compiler.nodes.PiNode;
44 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
45 import org.graalvm.compiler.nodes.extended.RawLoadNode;
46 import org.graalvm.compiler.word.Word;
47 import jdk.internal.vm.compiler.word.LocationIdentity;
48 import jdk.internal.vm.compiler.word.Pointer;
49 import jdk.internal.vm.compiler.word.WordFactory;
50
51 import jdk.vm.ci.meta.DeoptimizationAction;
52 import jdk.vm.ci.meta.DeoptimizationReason;
53 import jdk.vm.ci.meta.JavaKind;
54
55 // JaCoCo Exclude
56
57 /**
58 * Substitutions for {@code com.sun.crypto.provider.AESCrypt} methods.
59 */
60 @ClassSubstitution(className = "com.sun.crypto.provider.AESCrypt", optional = true)
61 public class AESCryptSubstitutions {
62
63 static final long kOffset;
64 static final long lastKeyOffset;
65 static final Class<?> AESCryptClass;
66
67 /**
68 * The AES block size is a constant 128 bits as defined by the
69 * <a href="http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.197.pdf">standard<a/>.
70 */
71 static final int AES_BLOCK_SIZE_IN_BYTES = 16;
72
73 static {
74 try {
75 // Need to use the system class loader as com.sun.crypto.provider.AESCrypt
76 // is normally loaded by the extension class loader which is not delegated
77 // to by the JVMCI class loader.
78 ClassLoader cl = ClassLoader.getSystemClassLoader();
79 AESCryptClass = Class.forName("com.sun.crypto.provider.AESCrypt", true, cl);
80 kOffset = UnsafeAccess.UNSAFE.objectFieldOffset(AESCryptClass.getDeclaredField("K"));
81 lastKeyOffset = UnsafeAccess.UNSAFE.objectFieldOffset(AESCryptClass.getDeclaredField("lastKey"));
82 } catch (Exception ex) {
83 throw new GraalError(ex);
84 }
85 }
86
87 @MethodSubstitution(isStatic = false)
88 static void encryptBlock(Object rcvr, byte[] in, int inOffset, byte[] out, int outOffset) {
89 crypt(rcvr, in, inOffset, out, outOffset, true, false);
90 }
91
92 @MethodSubstitution(isStatic = false)
93 static void implEncryptBlock(Object rcvr, byte[] in, int inOffset, byte[] out, int outOffset) {
94 crypt(rcvr, in, inOffset, out, outOffset, true, false);
95 }
96
97 @MethodSubstitution(isStatic = false)
98 static void decryptBlock(Object rcvr, byte[] in, int inOffset, byte[] out, int outOffset) {
99 crypt(rcvr, in, inOffset, out, outOffset, false, false);
100 }
101
102 @MethodSubstitution(isStatic = false)
103 static void implDecryptBlock(Object rcvr, byte[] in, int inOffset, byte[] out, int outOffset) {
104 crypt(rcvr, in, inOffset, out, outOffset, false, false);
105 }
106
107 /**
108 * Variation for platforms (e.g. SPARC) that need do key expansion in stubs due to compatibility
109 * issues between Java key expansion and hardware crypto instructions.
110 */
111 @MethodSubstitution(value = "decryptBlock", isStatic = false)
112 static void decryptBlockWithOriginalKey(Object rcvr, byte[] in, int inOffset, byte[] out, int outOffset) {
113 crypt(rcvr, in, inOffset, out, outOffset, false, true);
114 }
115
116 /**
117 * @see #decryptBlockWithOriginalKey(Object, byte[], int, byte[], int)
118 */
119 @MethodSubstitution(value = "implDecryptBlock", isStatic = false)
120 static void implDecryptBlockWithOriginalKey(Object rcvr, byte[] in, int inOffset, byte[] out, int outOffset) {
121 crypt(rcvr, in, inOffset, out, outOffset, false, true);
122 }
123
124 private static void crypt(Object rcvr, byte[] in, int inOffset, byte[] out, int outOffset, boolean encrypt, boolean withOriginalKey) {
125 checkArgs(in, inOffset, out, outOffset);
126 Object realReceiver = PiNode.piCastNonNull(rcvr, AESCryptClass);
127 Object kObject = RawLoadNode.load(realReceiver, kOffset, JavaKind.Object, LocationIdentity.any());
128 Pointer kAddr = Word.objectToTrackedPointer(kObject).add(getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Int));
129 Word inAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(in, getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Byte) + inOffset));
130 Word outAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(out, getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Byte) + outOffset));
131 if (encrypt) {
132 encryptBlockStub(ENCRYPT_BLOCK, inAddr, outAddr, kAddr);
133 } else {
134 if (withOriginalKey) {
135 Object lastKeyObject = RawLoadNode.load(realReceiver, lastKeyOffset, JavaKind.Object, LocationIdentity.any());
136 Pointer lastKeyAddr = Word.objectToTrackedPointer(lastKeyObject).add(getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Byte));
137 decryptBlockWithOriginalKeyStub(DECRYPT_BLOCK_WITH_ORIGINAL_KEY, inAddr, outAddr, kAddr, lastKeyAddr);
138 } else {
139 decryptBlockStub(DECRYPT_BLOCK, inAddr, outAddr, kAddr);
140 }
141 }
142 }
143
144 /**
145 * Perform null and array bounds checks for arguments to a cipher operation.
146 */
147 static void checkArgs(byte[] in, int inOffset, byte[] out, int outOffset) {
148 if (probability(VERY_SLOW_PATH_PROBABILITY, inOffset < 0 || in.length - AES_BLOCK_SIZE_IN_BYTES < inOffset || outOffset < 0 || out.length - AES_BLOCK_SIZE_IN_BYTES < outOffset)) {
149 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint);
150 }
151 }
152
153 @NodeIntrinsic(ForeignCallNode.class)
154 public static native void encryptBlockStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Word in, Word out, Pointer key);
155
156 @NodeIntrinsic(ForeignCallNode.class)
157 public static native void decryptBlockStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Word in, Word out, Pointer key);
158
159 @NodeIntrinsic(ForeignCallNode.class)
160 public static native void decryptBlockWithOriginalKeyStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Word in, Word out, Pointer key, Pointer originalKey);
161 }