| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.oracle.security.ucrypto; |
| |
| import java.lang.ref.*; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.util.*; |
| import java.util.concurrent.ConcurrentSkipListSet; |
| import java.security.*; |
| |
| /** |
| * MessageDigest implementation class for libMD API. This class currently supports |
| * MD5, SHA1, SHA256, SHA384, and SHA512 |
| * |
| * @since 9 |
| */ |
| public abstract class NativeDigestMD extends MessageDigestSpi |
| implements Cloneable { |
| |
| private static final int MECH_MD5 = 1; |
| private static final int MECH_SHA1 = 2; |
| private static final int MECH_SHA256 = 3; |
| private static final int MECH_SHA224 = 4; |
| private static final int MECH_SHA384 = 5; |
| private static final int MECH_SHA512 = 6; |
| |
| private final int digestLen; |
| private final int mech; |
| |
| // field for ensuring native memory is freed |
| private DigestContextRef pCtxt = null; |
| |
| private static class DigestContextRef extends PhantomReference<NativeDigestMD> |
| implements Comparable<DigestContextRef> { |
| |
| private static ReferenceQueue<NativeDigestMD> refQueue = |
| new ReferenceQueue<NativeDigestMD>(); |
| |
| // Needed to keep these references from being GC'ed until when their |
| // referents are GC'ed so we can do post-mortem processing |
| private static Set<DigestContextRef> refList = |
| new ConcurrentSkipListSet<DigestContextRef>(); |
| // Collections.synchronizedSortedSet(new TreeSet<DigestContextRef>()); |
| |
| private final long id; |
| private final int mech; |
| |
| private static void drainRefQueueBounded() { |
| while (true) { |
| DigestContextRef next = (DigestContextRef) refQueue.poll(); |
| if (next == null) break; |
| next.dispose(true); |
| } |
| } |
| |
| DigestContextRef(NativeDigestMD nc, long id, int mech) { |
| super(nc, refQueue); |
| this.id = id; |
| this.mech = mech; |
| refList.add(this); |
| UcryptoProvider.debug("Resource: track Digest Ctxt " + this.id); |
| drainRefQueueBounded(); |
| } |
| |
| public int compareTo(DigestContextRef other) { |
| if (this.id == other.id) { |
| return 0; |
| } else { |
| return (this.id < other.id) ? -1 : 1; |
| } |
| } |
| |
| void dispose(boolean needFree) { |
| refList.remove(this); |
| try { |
| if (needFree) { |
| UcryptoProvider.debug("Resource: free Digest Ctxt " + this.id); |
| NativeDigestMD.nativeFree(mech, id); |
| } else UcryptoProvider.debug("Resource: stop tracking Digest Ctxt " + this.id); |
| } finally { |
| this.clear(); |
| } |
| } |
| } |
| |
| NativeDigestMD(int mech, int digestLen) { |
| this.digestLen = digestLen; |
| this.mech = mech; |
| } |
| |
| // see JCA spec |
| protected int engineGetDigestLength() { |
| return digestLen; |
| } |
| |
| // see JCA spec |
| protected synchronized void engineReset() { |
| if (pCtxt != null) { |
| pCtxt.dispose(true); |
| pCtxt = null; |
| } |
| } |
| |
| // see JCA spec |
| protected synchronized byte[] engineDigest() { |
| byte[] digest = new byte[digestLen]; |
| try { |
| int len = engineDigest(digest, 0, digestLen); |
| if (len != digestLen) { |
| throw new UcryptoException("Digest length mismatch." + |
| " Len: " + len + ". digestLen: " + digestLen); |
| } |
| return digest; |
| } catch (DigestException de) { |
| throw new UcryptoException("Internal error", de); |
| } |
| } |
| |
| // see JCA spec |
| protected synchronized int engineDigest(byte[] out, int ofs, int len) |
| throws DigestException { |
| if (len < digestLen) { |
| throw new DigestException("Output buffer must be at least " + |
| digestLen + " bytes long. Got: " + len); |
| } |
| if ((ofs < 0) || (len < 0) || (ofs > out.length - len)) { |
| throw new DigestException("Buffer too short to store digest. " + |
| "ofs: " + ofs + ". len: " + len + ". out.length: " + out.length); |
| } |
| |
| if (pCtxt == null) { |
| pCtxt = new DigestContextRef(this, nativeInit(mech), mech); |
| } |
| try { |
| int status = nativeDigest(mech, pCtxt.id, out, ofs, digestLen); |
| if (status != 0) { |
| throw new DigestException("Internal error: " + status); |
| } |
| } finally { |
| pCtxt.dispose(false); |
| pCtxt = null; |
| } |
| return digestLen; |
| } |
| |
| // see JCA spec |
| protected synchronized void engineUpdate(byte in) { |
| byte[] temp = { in }; |
| engineUpdate(temp, 0, 1); |
| } |
| |
| // see JCA spec |
| protected synchronized void engineUpdate(byte[] in, int ofs, int len) { |
| if (len == 0) { |
| return; |
| } |
| if ((ofs < 0) || (len < 0) || (ofs > in.length - len)) { |
| throw new ArrayIndexOutOfBoundsException("ofs: " + ofs + ". len: " |
| + len + ". in.length: " + in.length); |
| } |
| if (pCtxt == null) { |
| pCtxt = new DigestContextRef(this, nativeInit(mech), mech); |
| } |
| nativeUpdate(mech, pCtxt.id, in, ofs, len); |
| } |
| |
| /** |
| * Clone this digest. |
| */ |
| public synchronized Object clone() throws CloneNotSupportedException { |
| NativeDigestMD copy = (NativeDigestMD) super.clone(); |
| // re-work the fields that cannot be copied over |
| if (pCtxt != null) { |
| copy.pCtxt = new DigestContextRef(this, nativeClone(mech, pCtxt.id), mech); |
| } |
| return copy; |
| } |
| |
| // return pointer to the context |
| protected static final native long nativeInit(int mech); |
| // return status code; always 0 |
| protected static final native int nativeUpdate(int mech, long pCtxt, byte[] in, int ofs, int inLen); |
| // return status code; always 0 |
| protected static final native int nativeDigest(int mech, long pCtxt, byte[] out, int ofs, int digestLen); |
| // return pointer to the duplicated context |
| protected static final native long nativeClone(int mech, long pCtxt); |
| // free the specified context |
| private static final native void nativeFree(int mech, long id); |
| |
| |
| public static final class MD5 extends NativeDigestMD { |
| public MD5() { |
| super(MECH_MD5, 16); |
| } |
| } |
| |
| public static final class SHA1 extends NativeDigestMD { |
| public SHA1() { |
| super(MECH_SHA1, 20); |
| } |
| } |
| |
| public static final class SHA256 extends NativeDigestMD { |
| public SHA256() { |
| super(MECH_SHA256, 32); |
| } |
| } |
| |
| |
| public static final class SHA384 extends NativeDigestMD { |
| public SHA384() { |
| super(MECH_SHA384, 48); |
| } |
| } |
| |
| |
| public static final class SHA512 extends NativeDigestMD { |
| public SHA512() { |
| super(MECH_SHA512, 64); |
| } |
| } |
| } |