* changes: Switch to pure Java SHA1 for ObjectId Pure Java SHA-1tags/v4.7.0.201704051617-r
@@ -49,6 +49,7 @@ Import-Package: com.googlecode.javaewah;version="[1.1.6,2.0.0)", | |||
org.eclipse.jgit.treewalk.filter;version="[4.7.0,4.8.0)", | |||
org.eclipse.jgit.util;version="[4.7.0,4.8.0)", | |||
org.eclipse.jgit.util.io;version="[4.7.0,4.8.0)", | |||
org.eclipse.jgit.util.sha1;version="[4.7.0,4.8.0)", | |||
org.junit;version="[4.4.0,5.0.0)", | |||
org.junit.experimental.theories;version="[4.4.0,5.0.0)", | |||
org.junit.rules;version="[4.11.0,5.0.0)", |
@@ -0,0 +1,112 @@ | |||
/* | |||
* Copyright (C) 2017, Google Inc. | |||
* and other copyright owners as documented in the project's IP log. | |||
* | |||
* This program and the accompanying materials are made available | |||
* under the terms of the Eclipse Distribution License v1.0 which | |||
* accompanies this distribution, is reproduced below, and is | |||
* available at http://www.eclipse.org/org/documents/edl-v10.php | |||
* | |||
* All rights reserved. | |||
* | |||
* Redistribution and use in source and binary forms, with or | |||
* without modification, are permitted provided that the following | |||
* conditions are met: | |||
* | |||
* - Redistributions of source code must retain the above copyright | |||
* notice, this list of conditions and the following disclaimer. | |||
* | |||
* - Redistributions in binary form must reproduce the above | |||
* copyright notice, this list of conditions and the following | |||
* disclaimer in the documentation and/or other materials provided | |||
* with the distribution. | |||
* | |||
* - Neither the name of the Eclipse Foundation, Inc. nor the | |||
* names of its contributors may be used to endorse or promote | |||
* products derived from this software without specific prior | |||
* written permission. | |||
* | |||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND | |||
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, | |||
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |||
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |||
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |||
*/ | |||
package org.eclipse.jgit.util.sha1; | |||
import static org.junit.Assert.assertEquals; | |||
import java.nio.charset.StandardCharsets; | |||
import java.security.MessageDigest; | |||
import java.security.NoSuchAlgorithmException; | |||
import org.eclipse.jgit.lib.ObjectId; | |||
import org.junit.Test; | |||
public class SHA1Test { | |||
private static final String TEST1 = "abc"; | |||
private static final String TEST2a = "abcdbcdecdefdefgefghfghighijhi"; | |||
private static final String TEST2b = "jkijkljklmklmnlmnomnopnopq"; | |||
private static final String TEST2 = TEST2a + TEST2b; | |||
@Test | |||
public void test0() throws NoSuchAlgorithmException { | |||
ObjectId exp = ObjectId | |||
.fromString("da39a3ee5e6b4b0d3255bfef95601890afd80709"); | |||
MessageDigest m = MessageDigest.getInstance("SHA-1"); | |||
m.update(new byte[] {}); | |||
ObjectId m1 = ObjectId.fromRaw(m.digest()); | |||
SHA1 s = SHA1.newInstance(); | |||
s.update(new byte[] {}); | |||
ObjectId s1 = ObjectId.fromRaw(s.digest()); | |||
assertEquals(m1, s1); | |||
assertEquals(exp, s1); | |||
} | |||
@Test | |||
public void test1() throws NoSuchAlgorithmException { | |||
ObjectId exp = ObjectId | |||
.fromString("a9993e364706816aba3e25717850c26c9cd0d89d"); | |||
MessageDigest m = MessageDigest.getInstance("SHA-1"); | |||
m.update(TEST1.getBytes(StandardCharsets.UTF_8)); | |||
ObjectId m1 = ObjectId.fromRaw(m.digest()); | |||
SHA1 s = SHA1.newInstance(); | |||
s.update(TEST1.getBytes(StandardCharsets.UTF_8)); | |||
ObjectId s1 = ObjectId.fromRaw(s.digest()); | |||
assertEquals(m1, s1); | |||
assertEquals(exp, s1); | |||
} | |||
@Test | |||
public void test2() throws NoSuchAlgorithmException { | |||
ObjectId exp = ObjectId | |||
.fromString("84983e441c3bd26ebaae4aa1f95129e5e54670f1"); | |||
MessageDigest m = MessageDigest.getInstance("SHA-1"); | |||
m.update(TEST2.getBytes(StandardCharsets.UTF_8)); | |||
ObjectId m1 = ObjectId.fromRaw(m.digest()); | |||
SHA1 s = SHA1.newInstance(); | |||
s.update(TEST2.getBytes(StandardCharsets.UTF_8)); | |||
ObjectId s1 = ObjectId.fromRaw(s.digest()); | |||
assertEquals(m1, s1); | |||
assertEquals(exp, s1); | |||
} | |||
} |
@@ -138,6 +138,7 @@ Export-Package: org.eclipse.jgit.annotations;version="4.7.0", | |||
org.eclipse.jgit.storage.file, | |||
org.ietf.jgss", | |||
org.eclipse.jgit.util.io;version="4.7.0", | |||
org.eclipse.jgit.util.sha1;version="4.7.0", | |||
org.eclipse.jgit.util.time;version="4.7.0" | |||
Bundle-RequiredExecutionEnvironment: JavaSE-1.8 | |||
Import-Package: com.googlecode.javaewah;version="[1.1.6,2.0.0)", |
@@ -90,6 +90,7 @@ import org.eclipse.jgit.util.IO; | |||
import org.eclipse.jgit.util.NB; | |||
import org.eclipse.jgit.util.TemporaryBuffer; | |||
import org.eclipse.jgit.util.io.CountingOutputStream; | |||
import org.eclipse.jgit.util.sha1.SHA1; | |||
/** Inserts objects into the DFS. */ | |||
public class DfsInserter extends ObjectInserter { | |||
@@ -168,7 +169,7 @@ public class DfsInserter extends ObjectInserter { | |||
} | |||
long offset = beginObject(type, len); | |||
MessageDigest md = digest(); | |||
SHA1 md = SHA1.newInstance(); | |||
md.update(Constants.encodedTypeString(type)); | |||
md.update((byte) ' '); | |||
md.update(Constants.encodeASCII(len)); | |||
@@ -183,7 +184,7 @@ public class DfsInserter extends ObjectInserter { | |||
len -= n; | |||
} | |||
packOut.compress.finish(); | |||
return endObject(ObjectId.fromRaw(md.digest()), offset); | |||
return endObject(md.toObjectId(), offset); | |||
} | |||
private byte[] insertBuffer(long len) { |
@@ -49,12 +49,11 @@ import java.io.EOFException; | |||
import java.io.File; | |||
import java.io.FileNotFoundException; | |||
import java.io.FileOutputStream; | |||
import java.io.FilterOutputStream; | |||
import java.io.IOException; | |||
import java.io.InputStream; | |||
import java.io.OutputStream; | |||
import java.nio.channels.Channels; | |||
import java.security.DigestOutputStream; | |||
import java.security.MessageDigest; | |||
import java.text.MessageFormat; | |||
import java.util.zip.Deflater; | |||
import java.util.zip.DeflaterOutputStream; | |||
@@ -69,6 +68,7 @@ import org.eclipse.jgit.lib.ObjectReader; | |||
import org.eclipse.jgit.transport.PackParser; | |||
import org.eclipse.jgit.util.FileUtils; | |||
import org.eclipse.jgit.util.IO; | |||
import org.eclipse.jgit.util.sha1.SHA1; | |||
/** Creates loose objects in a {@link ObjectDirectory}. */ | |||
class ObjectDirectoryInserter extends ObjectInserter { | |||
@@ -140,9 +140,9 @@ class ObjectDirectoryInserter extends ObjectInserter { | |||
return insert(type, buf, 0, actLen, createDuplicate); | |||
} else { | |||
MessageDigest md = digest(); | |||
SHA1 md = SHA1.newInstance(); | |||
File tmp = toTemp(md, type, len, is); | |||
ObjectId id = ObjectId.fromRaw(md.digest()); | |||
ObjectId id = md.toObjectId(); | |||
return insertOneObject(tmp, id, createDuplicate); | |||
} | |||
} | |||
@@ -193,7 +193,7 @@ class ObjectDirectoryInserter extends ObjectInserter { | |||
} | |||
@SuppressWarnings("resource" /* java 7 */) | |||
private File toTemp(final MessageDigest md, final int type, long len, | |||
private File toTemp(final SHA1 md, final int type, long len, | |||
final InputStream is) throws IOException, FileNotFoundException, | |||
Error { | |||
boolean delete = true; | |||
@@ -205,7 +205,7 @@ class ObjectDirectoryInserter extends ObjectInserter { | |||
if (config.getFSyncObjectFiles()) | |||
out = Channels.newOutputStream(fOut.getChannel()); | |||
DeflaterOutputStream cOut = compress(out); | |||
DigestOutputStream dOut = new DigestOutputStream(cOut, md); | |||
SHA1OutputStream dOut = new SHA1OutputStream(cOut, md); | |||
writeHeader(dOut, type, len); | |||
final byte[] buf = buffer(); | |||
@@ -285,4 +285,25 @@ class ObjectDirectoryInserter extends ObjectInserter { | |||
return new EOFException(MessageFormat.format( | |||
JGitText.get().inputDidntMatchLength, Long.valueOf(missing))); | |||
} | |||
private static class SHA1OutputStream extends FilterOutputStream { | |||
private final SHA1 md; | |||
SHA1OutputStream(OutputStream out, SHA1 md) { | |||
super(out); | |||
this.md = md; | |||
} | |||
@Override | |||
public void write(int b) throws IOException { | |||
md.update((byte) b); | |||
out.write(b); | |||
} | |||
@Override | |||
public void write(byte[] in, int p, int n) throws IOException { | |||
md.update(in, p, n); | |||
out.write(in, p, n); | |||
} | |||
} | |||
} |
@@ -208,6 +208,24 @@ public class MutableObjectId extends AnyObjectId { | |||
w5 = ints[p + 4]; | |||
} | |||
/** | |||
* Convert an ObjectId from binary representation expressed in integers. | |||
* | |||
* @param a | |||
* @param b | |||
* @param c | |||
* @param d | |||
* @param e | |||
* @since 4.7 | |||
*/ | |||
public void set(int a, int b, int c, int d, int e) { | |||
w1 = a; | |||
w2 = b; | |||
w3 = c; | |||
w4 = d; | |||
w5 = e; | |||
} | |||
/** | |||
* Convert an ObjectId from hex characters (US-ASCII). | |||
* |
@@ -248,8 +248,17 @@ public class ObjectId extends AnyObjectId implements Serializable { | |||
} | |||
} | |||
ObjectId(final int new_1, final int new_2, final int new_3, | |||
final int new_4, final int new_5) { | |||
/** | |||
* Construct an ObjectId from 160 bits provided in 5 words. | |||
* | |||
* @param new_1 | |||
* @param new_2 | |||
* @param new_3 | |||
* @param new_4 | |||
* @param new_5 | |||
* @since 4.7 | |||
*/ | |||
public ObjectId(int new_1, int new_2, int new_3, int new_4, int new_5) { | |||
w1 = new_1; | |||
w2 = new_2; | |||
w3 = new_3; |
@@ -50,10 +50,10 @@ import java.io.ByteArrayInputStream; | |||
import java.io.EOFException; | |||
import java.io.IOException; | |||
import java.io.InputStream; | |||
import java.security.MessageDigest; | |||
import org.eclipse.jgit.internal.JGitText; | |||
import org.eclipse.jgit.transport.PackParser; | |||
import org.eclipse.jgit.util.sha1.SHA1; | |||
/** | |||
* Inserts objects into an existing {@code ObjectDatabase}. | |||
@@ -177,15 +177,11 @@ public abstract class ObjectInserter implements AutoCloseable { | |||
} | |||
} | |||
/** Digest to compute the name of an object. */ | |||
private final MessageDigest digest; | |||
/** Temporary working buffer for streaming data through. */ | |||
private byte[] tempBuffer; | |||
/** Create a new inserter for a database. */ | |||
protected ObjectInserter() { | |||
digest = Constants.newMessageDigest(); | |||
} | |||
/** | |||
@@ -220,9 +216,8 @@ public abstract class ObjectInserter implements AutoCloseable { | |||
} | |||
/** @return digest to help compute an ObjectId */ | |||
protected MessageDigest digest() { | |||
digest.reset(); | |||
return digest; | |||
protected SHA1 digest() { | |||
return SHA1.newInstance(); | |||
} | |||
/** | |||
@@ -252,13 +247,13 @@ public abstract class ObjectInserter implements AutoCloseable { | |||
* @return the name of the object. | |||
*/ | |||
public ObjectId idFor(int type, byte[] data, int off, int len) { | |||
MessageDigest md = digest(); | |||
SHA1 md = SHA1.newInstance(); | |||
md.update(Constants.encodedTypeString(type)); | |||
md.update((byte) ' '); | |||
md.update(Constants.encodeASCII(len)); | |||
md.update((byte) 0); | |||
md.update(data, off, len); | |||
return ObjectId.fromRaw(md.digest()); | |||
return md.toObjectId(); | |||
} | |||
/** | |||
@@ -277,7 +272,7 @@ public abstract class ObjectInserter implements AutoCloseable { | |||
*/ | |||
public ObjectId idFor(int objectType, long length, InputStream in) | |||
throws IOException { | |||
MessageDigest md = digest(); | |||
SHA1 md = SHA1.newInstance(); | |||
md.update(Constants.encodedTypeString(objectType)); | |||
md.update((byte) ' '); | |||
md.update(Constants.encodeASCII(length)); | |||
@@ -290,7 +285,7 @@ public abstract class ObjectInserter implements AutoCloseable { | |||
md.update(buf, 0, n); | |||
length -= n; | |||
} | |||
return ObjectId.fromRaw(md.digest()); | |||
return md.toObjectId(); | |||
} | |||
/** |
@@ -83,6 +83,7 @@ import org.eclipse.jgit.lib.ProgressMonitor; | |||
import org.eclipse.jgit.util.BlockList; | |||
import org.eclipse.jgit.util.IO; | |||
import org.eclipse.jgit.util.NB; | |||
import org.eclipse.jgit.util.sha1.SHA1; | |||
/** | |||
* Parses a pack stream and imports it for an {@link ObjectInserter}. | |||
@@ -116,8 +117,6 @@ public abstract class PackParser { | |||
private byte[] hdrBuf; | |||
private final MessageDigest objectDigest; | |||
private final MutableObjectId tempObjectId; | |||
private InputStream in; | |||
@@ -206,7 +205,6 @@ public abstract class PackParser { | |||
buf = new byte[BUFFER_SIZE]; | |||
tempBuffer = new byte[BUFFER_SIZE]; | |||
hdrBuf = new byte[64]; | |||
objectDigest = Constants.newMessageDigest(); | |||
tempObjectId = new MutableObjectId(); | |||
packDigest = Constants.newMessageDigest(); | |||
checkObjectCollisions = true; | |||
@@ -667,12 +665,13 @@ public abstract class PackParser { | |||
JGitText.get().corruptionDetectedReReadingAt, | |||
Long.valueOf(visit.delta.position))); | |||
SHA1 objectDigest = SHA1.newInstance(); | |||
objectDigest.update(Constants.encodedTypeString(type)); | |||
objectDigest.update((byte) ' '); | |||
objectDigest.update(Constants.encodeASCII(visit.data.length)); | |||
objectDigest.update((byte) 0); | |||
objectDigest.update(visit.data); | |||
tempObjectId.fromRaw(objectDigest.digest(), 0); | |||
objectDigest.digest(tempObjectId); | |||
verifySafeObject(tempObjectId, type, visit.data); | |||
@@ -1024,6 +1023,7 @@ public abstract class PackParser { | |||
private void whole(final long pos, final int type, final long sz) | |||
throws IOException { | |||
SHA1 objectDigest = SHA1.newInstance(); | |||
objectDigest.update(Constants.encodedTypeString(type)); | |||
objectDigest.update((byte) ' '); | |||
objectDigest.update(Constants.encodeASCII(sz)); | |||
@@ -1043,7 +1043,7 @@ public abstract class PackParser { | |||
cnt += r; | |||
} | |||
inf.close(); | |||
tempObjectId.fromRaw(objectDigest.digest(), 0); | |||
objectDigest.digest(tempObjectId); | |||
checkContentLater = isCheckObjectCollisions() | |||
&& readCurs.has(tempObjectId); | |||
data = null; | |||
@@ -1051,7 +1051,7 @@ public abstract class PackParser { | |||
} else { | |||
data = inflateAndReturn(Source.INPUT, sz); | |||
objectDigest.update(data); | |||
tempObjectId.fromRaw(objectDigest.digest(), 0); | |||
objectDigest.digest(tempObjectId); | |||
verifySafeObject(tempObjectId, type, data); | |||
} | |||
@@ -56,7 +56,6 @@ import java.nio.ByteBuffer; | |||
import java.nio.CharBuffer; | |||
import java.nio.charset.CharacterCodingException; | |||
import java.nio.charset.CharsetEncoder; | |||
import java.security.MessageDigest; | |||
import java.text.MessageFormat; | |||
import java.util.Arrays; | |||
import java.util.Collections; | |||
@@ -99,6 +98,7 @@ import org.eclipse.jgit.util.TemporaryBuffer; | |||
import org.eclipse.jgit.util.TemporaryBuffer.LocalFile; | |||
import org.eclipse.jgit.util.io.AutoLFInputStream; | |||
import org.eclipse.jgit.util.io.EolStreamTypeUtil; | |||
import org.eclipse.jgit.util.sha1.SHA1; | |||
/** | |||
* Walks a working directory tree as part of a {@link TreeWalk}. | |||
@@ -364,7 +364,7 @@ public abstract class WorkingTreeIterator extends AbstractTreeIterator { | |||
if (is == null) | |||
return zeroid; | |||
try { | |||
state.initializeDigestAndReadBuffer(); | |||
state.initializeReadBuffer(); | |||
final long len = e.getLength(); | |||
InputStream filteredIs = possiblyFilteredInputStream(e, is, len, | |||
@@ -1099,10 +1099,9 @@ public abstract class WorkingTreeIterator extends AbstractTreeIterator { | |||
} | |||
private byte[] computeHash(InputStream in, long length) throws IOException { | |||
final MessageDigest contentDigest = state.contentDigest; | |||
SHA1 contentDigest = SHA1.newInstance(); | |||
final byte[] contentReadBuffer = state.contentReadBuffer; | |||
contentDigest.reset(); | |||
contentDigest.update(hblob); | |||
contentDigest.update((byte) ' '); | |||
@@ -1330,9 +1329,6 @@ public abstract class WorkingTreeIterator extends AbstractTreeIterator { | |||
/** File name character encoder. */ | |||
final CharsetEncoder nameEncoder; | |||
/** Digest computer for {@link #contentId} computations. */ | |||
MessageDigest contentDigest; | |||
/** Buffer used to perform {@link #contentId} computations. */ | |||
byte[] contentReadBuffer; | |||
@@ -1347,9 +1343,8 @@ public abstract class WorkingTreeIterator extends AbstractTreeIterator { | |||
this.nameEncoder = Constants.CHARSET.newEncoder(); | |||
} | |||
void initializeDigestAndReadBuffer() { | |||
if (contentDigest == null) { | |||
contentDigest = Constants.newMessageDigest(); | |||
void initializeReadBuffer() { | |||
if (contentReadBuffer == null) { | |||
contentReadBuffer = new byte[BUFFER_SIZE]; | |||
} | |||
} |
@@ -0,0 +1,289 @@ | |||
/* | |||
* Copyright (C) 2017, Google Inc. | |||
* and other copyright owners as documented in the project's IP log. | |||
* | |||
* This program and the accompanying materials are made available | |||
* under the terms of the Eclipse Distribution License v1.0 which | |||
* accompanies this distribution, is reproduced below, and is | |||
* available at http://www.eclipse.org/org/documents/edl-v10.php | |||
* | |||
* All rights reserved. | |||
* | |||
* Redistribution and use in source and binary forms, with or | |||
* without modification, are permitted provided that the following | |||
* conditions are met: | |||
* | |||
* - Redistributions of source code must retain the above copyright | |||
* notice, this list of conditions and the following disclaimer. | |||
* | |||
* - Redistributions in binary form must reproduce the above | |||
* copyright notice, this list of conditions and the following | |||
* disclaimer in the documentation and/or other materials provided | |||
* with the distribution. | |||
* | |||
* - Neither the name of the Eclipse Foundation, Inc. nor the | |||
* names of its contributors may be used to endorse or promote | |||
* products derived from this software without specific prior | |||
* written permission. | |||
* | |||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND | |||
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, | |||
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |||
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |||
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |||
*/ | |||
package org.eclipse.jgit.util.sha1; | |||
import java.util.Arrays; | |||
import org.eclipse.jgit.lib.MutableObjectId; | |||
import org.eclipse.jgit.lib.ObjectId; | |||
import org.eclipse.jgit.util.NB; | |||
/** | |||
* Pure Java implementation of SHA-1 from FIPS 180-1 / RFC 3174. | |||
* | |||
* <p> | |||
* See <a href="https://tools.ietf.org/html/rfc3174">RFC 3174</a>. | |||
* | |||
* @since 4.7 | |||
*/ | |||
public class SHA1 { | |||
/** @return a new context to compute a SHA-1 hash of data. */ | |||
public static SHA1 newInstance() { | |||
return new SHA1(); | |||
} | |||
// Magic initialization constants defined by FIPS180. | |||
private int h0 = 0x67452301; | |||
private int h1 = 0xEFCDAB89; | |||
private int h2 = 0x98BADCFE; | |||
private int h3 = 0x10325476; | |||
private int h4 = 0xC3D2E1F0; | |||
private final int[] w = new int[80]; | |||
/** Buffer to accumulate partial blocks to 64 byte alignment. */ | |||
private final byte[] buffer = new byte[64]; | |||
/** Total number of bytes in the message. */ | |||
private long length; | |||
private SHA1() { | |||
} | |||
/** | |||
* Update the digest computation by adding a byte. | |||
* | |||
* @param b | |||
*/ | |||
public void update(byte b) { | |||
int bufferLen = (int) (length & 63); | |||
length++; | |||
buffer[bufferLen] = b; | |||
if (bufferLen == 63) { | |||
compress(buffer, 0); | |||
} | |||
} | |||
/** | |||
* Update the digest computation by adding bytes to the message. | |||
* | |||
* @param in | |||
* input array of bytes. | |||
*/ | |||
public void update(byte[] in) { | |||
update(in, 0, in.length); | |||
} | |||
/** | |||
* Update the digest computation by adding bytes to the message. | |||
* | |||
* @param in | |||
* input array of bytes. | |||
* @param p | |||
* offset to start at from {@code in}. | |||
* @param len | |||
* number of bytes to hash. | |||
*/ | |||
public void update(byte[] in, int p, int len) { | |||
// SHA-1 compress can only process whole 64 byte blocks. | |||
// Hold partial updates in buffer, whose length is the low bits. | |||
int bufferLen = (int) (length & 63); | |||
length += len; | |||
if (bufferLen > 0) { | |||
int n = Math.min(64 - bufferLen, len); | |||
System.arraycopy(in, p, buffer, bufferLen, n); | |||
p += n; | |||
len -= n; | |||
if (bufferLen + n < 64) { | |||
return; | |||
} | |||
compress(buffer, 0); | |||
} | |||
while (len >= 64) { | |||
compress(in, p); | |||
p += 64; | |||
len -= 64; | |||
} | |||
if (len > 0) { | |||
System.arraycopy(in, p, buffer, 0, len); | |||
} | |||
} | |||
private void compress(byte[] block, int p) { | |||
// Method 1 from RFC 3174 section 6.1. | |||
// Method 2 (circular queue of 16 words) is slower. | |||
int a = h0, b = h1, c = h2, d = h3, e = h4; | |||
// Round 1: 0 <= t <= 15 comes from the input block. | |||
for (int t = 0; t < 16; t++) { | |||
int temp = NB.decodeInt32(block, p + (t << 2)); | |||
w[t] = temp; | |||
temp += ((a << 5) | (a >>> 27)) // S^5(A) | |||
+ (((c ^ d) & b) ^ d) // f: 0 <= t <= 19 | |||
+ e + 0x5A827999; | |||
e = d; | |||
d = c; | |||
c = (b << 30) | (b >>> 2); // S^30(B) | |||
b = a; | |||
a = temp; | |||
} | |||
// RFC 3174 6.1.b, extend state vector to 80 words. | |||
for (int t = 16; t < 80; t++) { | |||
int x = w[t - 3] ^ w[t - 8] ^ w[t - 14] ^ w[t - 16]; | |||
w[t] = (x << 1) | (x >>> 31); // S^1(...) | |||
} | |||
// Round 1: tail | |||
for (int t = 16; t < 20; t++) { | |||
int temp = ((a << 5) | (a >>> 27)) // S^5(A) | |||
+ (((c ^ d) & b) ^ d) // f: 0 <= t <= 19 | |||
+ e + w[t] + 0x5A827999; | |||
e = d; | |||
d = c; | |||
c = (b << 30) | (b >>> 2); // S^30(B) | |||
b = a; | |||
a = temp; | |||
} | |||
// Round 2 | |||
for (int t = 20; t < 40; t++) { | |||
int temp = ((a << 5) | (a >>> 27)) // S^5(A) | |||
+ (b ^ c ^ d) // f: 20 <= t <= 39 | |||
+ e + w[t] + 0x6ED9EBA1; | |||
e = d; | |||
d = c; | |||
c = (b << 30) | (b >>> 2); // S^30(B) | |||
b = a; | |||
a = temp; | |||
} | |||
// Round 3 | |||
for (int t = 40; t < 60; t++) { | |||
int temp = ((a << 5) | (a >>> 27)) // S^5(A) | |||
+ ((b & c) | (d & (b | c))) // f: 40 <= t <= 59 | |||
+ e + w[t] + 0x8F1BBCDC; | |||
e = d; | |||
d = c; | |||
c = (b << 30) | (b >>> 2); // S^30(B) | |||
b = a; | |||
a = temp; | |||
} | |||
// Round 4 | |||
for (int t = 60; t < 80; t++) { | |||
int temp = ((a << 5) | (a >>> 27)) // S^5(A) | |||
+ (b ^ c ^ d) // f: 60 <= t <= 79 | |||
+ e + w[t] + 0xCA62C1D6; | |||
e = d; | |||
d = c; | |||
c = (b << 30) | (b >>> 2); // S^30(B) | |||
b = a; | |||
a = temp; | |||
} | |||
h0 += a; | |||
h1 += b; | |||
h2 += c; | |||
h3 += d; | |||
h4 += e; | |||
} | |||
private void finish() { | |||
int bufferLen = (int) (length & 63); | |||
if (bufferLen > 55) { | |||
// Last block is too small; pad, compress, pad another block. | |||
buffer[bufferLen++] = (byte) 0x80; | |||
Arrays.fill(buffer, bufferLen, 64, (byte) 0); | |||
compress(buffer, 0); | |||
Arrays.fill(buffer, 0, 56, (byte) 0); | |||
} else { | |||
// Last block can hold padding and length. | |||
buffer[bufferLen++] = (byte) 0x80; | |||
Arrays.fill(buffer, bufferLen, 56, (byte) 0); | |||
} | |||
// SHA-1 appends the length of the message in bits after the | |||
// padding block (above). Here length is in bytes. Multiply by | |||
// 8 by shifting by 3 as part of storing the 64 bit byte length | |||
// into the two words expected in the trailer. | |||
NB.encodeInt32(buffer, 56, (int) (length >>> (32 - 3))); | |||
NB.encodeInt32(buffer, 60, (int) (length << 3)); | |||
compress(buffer, 0); | |||
} | |||
/** | |||
* Finish the digest and return the resulting hash. | |||
* <p> | |||
* Once {@code digest()} is called, this instance should be discarded. | |||
* | |||
* @return the bytes for the resulting hash. | |||
*/ | |||
public byte[] digest() { | |||
finish(); | |||
byte[] b = new byte[20]; | |||
NB.encodeInt32(b, 0, h0); | |||
NB.encodeInt32(b, 4, h1); | |||
NB.encodeInt32(b, 8, h2); | |||
NB.encodeInt32(b, 12, h3); | |||
NB.encodeInt32(b, 16, h4); | |||
return b; | |||
} | |||
/** | |||
* Finish the digest and return the resulting hash. | |||
* <p> | |||
* Once {@code digest()} is called, this instance should be discarded. | |||
* | |||
* @return the ObjectId for the resulting hash. | |||
*/ | |||
public ObjectId toObjectId() { | |||
finish(); | |||
return new ObjectId(h0, h1, h2, h3, h4); | |||
} | |||
/** | |||
* Finish the digest and return the resulting hash. | |||
* <p> | |||
* Once {@code digest()} is called, this instance should be discarded. | |||
* | |||
* @param id | |||
* destination to copy the digest to. | |||
*/ | |||
public void digest(MutableObjectId id) { | |||
finish(); | |||
id.set(h0, h1, h2, h3, h4); | |||
} | |||
} |