-/*
- * Copyright (C) 2007-2012 Argeo GmbH
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
package org.argeo.util;
import java.io.File;
/** Utilities around cryptographic digests */
public class DigestUtils {
+ public final static String MD5 = "MD5";
+ public final static String SHA1 = "SHA1";
+ public final static String SHA256 = "SHA-256";
+ public final static String SHA512 = "SHA-512";
+
private static Boolean debug = false;
// TODO: make it writable
private final static Integer byteBufferCapacity = 100 * 1024;// 100 KB
+ public static byte[] sha1(byte[] bytes) {
+ try {
+ MessageDigest digest = MessageDigest.getInstance(SHA1);
+ digest.update(bytes);
+ byte[] checksum = digest.digest();
+ return checksum;
+ } catch (Exception e) {
+ throw new UtilsException("Cannot SHA1 digest", e);
+ }
+ }
+
public static String digest(String algorithm, byte[] bytes) {
try {
MessageDigest digest = MessageDigest.getInstance(algorithm);
}
}
+ public static String sha1hex(Path path) {
+ return digest(SHA1, path, byteBufferCapacity);
+ }
+
+ public static String digest(String algorithm, Path path, long bufferSize) {
+ byte[] digest = digestRaw(algorithm, path, bufferSize);
+ return encodeHexString(digest);
+ }
+
public static byte[] digestRaw(String algorithm, Path file, long bufferSize) {
long begin = System.currentTimeMillis();
try {
bb = fc.map(MapMode.READ_ONLY, position, bufferSize);
position = position + bufferSize;
} else {
- bb = fc.map(MapMode.READ_ONLY, position, fileSize - bufferSize);
+ bb = fc.map(MapMode.READ_ONLY, position, fileSize - position);
position = fileSize;
}
md.update(bb);
System.out.println(algorithm + ": " + digest(algorithm, file));
algorithm = "SHA";
System.out.println(algorithm + ": " + digest(algorithm, file));
+ System.out.println(algorithm + ": " + sha1hex(file.toPath()));
algorithm = "SHA-256";
System.out.println(algorithm + ": " + digest(algorithm, file));
algorithm = "SHA-512";