-/*
- * 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 static org.argeo.util.BytesUtils.toHexString;
+
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
+import java.nio.channels.FileChannel.MapMode;
+import java.nio.file.Files;
+import java.nio.file.Path;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/** Utilities around cryptographic digests */
public class DigestUtils {
- private static Boolean debug = true;
- // TODO: make it writable
+ 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 configurable
private final static Integer byteBufferCapacity = 100 * 1024;// 100 KB
- public static String digest(String algorithm, byte[] bytes) {
+ public static byte[] sha1(byte[]... bytes) {
+ try {
+ MessageDigest digest = MessageDigest.getInstance(SHA1);
+ for (byte[] arr : bytes)
+ digest.update(arr);
+ byte[] checksum = digest.digest();
+ return checksum;
+ } catch (NoSuchAlgorithmException e) {
+ throw new UnsupportedOperationException("SHA1 is not avalaible", e);
+ }
+ }
+
+ public static byte[] digestAsBytes(String algorithm, byte[]... bytes) {
try {
MessageDigest digest = MessageDigest.getInstance(algorithm);
- digest.update(bytes);
+ for (byte[] arr : bytes)
+ digest.update(arr);
byte[] checksum = digest.digest();
- String res = encodeHexString(checksum);
- return res;
- } catch (Exception e) {
- throw new UtilsException("Cannot digest with algorithm " + algorithm, e);
+ return checksum;
+ } catch (NoSuchAlgorithmException e) {
+ throw new UnsupportedOperationException("Cannot digest with algorithm " + algorithm, e);
}
}
+ public static String digest(String algorithm, byte[]... bytes) {
+ return toHexString(digestAsBytes(algorithm, bytes));
+ }
+
public static String digest(String algorithm, InputStream in) {
try {
MessageDigest digest = MessageDigest.getInstance(algorithm);
}
byte[] checksum = digest.digest();
- String res = encodeHexString(checksum);
+ String res = toHexString(checksum);
return res;
- } catch (Exception e) {
- throw new UtilsException("Cannot digest with algorithm " + algorithm, e);
+ } catch (NoSuchAlgorithmException e) {
+ throw new IllegalArgumentException("Cannot digest with algorithm " + algorithm, e);
+ } catch (IOException e) {
+ throw new RuntimeException(e);
} finally {
StreamUtils.closeQuietly(in);
}
ByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, sz);
return digest(algorithm, bb);
} catch (IOException e) {
- throw new UtilsException("Cannot digest " + file + " with algorithm " + algorithm, e);
+ throw new IllegalArgumentException("Cannot digest " + file + " with algorithm " + algorithm, e);
} finally {
StreamUtils.closeQuietly(fis);
if (fc.isOpen())
MessageDigest digest = MessageDigest.getInstance(algorithm);
digest.update(bb);
byte[] checksum = digest.digest();
- String res = encodeHexString(checksum);
+ String res = toHexString(checksum);
long end = System.currentTimeMillis();
if (debug)
System.out.println((end - begin) + " ms / " + ((end - begin) / 1000) + " s");
return res;
} catch (NoSuchAlgorithmException e) {
- throw new UtilsException("Cannot digest with algorithm " + algorithm, e);
+ throw new IllegalArgumentException("Cannot digest with algorithm " + algorithm, e);
+ }
+ }
+
+ public static String sha1hex(Path path) {
+ return digest(SHA1, path, byteBufferCapacity);
+ }
+
+ public static String digest(String algorithm, Path path, long bufferSize) {
+ byte[] digest = digestAsBytes(algorithm, path, bufferSize);
+ return toHexString(digest);
+ }
+
+ public static byte[] digestAsBytes(String algorithm, Path file, long bufferSize) {
+ long begin = System.currentTimeMillis();
+ try {
+ MessageDigest md = MessageDigest.getInstance(algorithm);
+ FileChannel fc = FileChannel.open(file);
+ long fileSize = Files.size(file);
+ if (fileSize <= bufferSize) {
+ ByteBuffer bb = fc.map(MapMode.READ_ONLY, 0, fileSize);
+ md.update(bb);
+ } else {
+ long lastCycle = (fileSize / bufferSize) - 1;
+ long position = 0;
+ for (int i = 0; i <= lastCycle; i++) {
+ ByteBuffer bb;
+ if (i != lastCycle) {
+ bb = fc.map(MapMode.READ_ONLY, position, bufferSize);
+ position = position + bufferSize;
+ } else {
+ bb = fc.map(MapMode.READ_ONLY, position, fileSize - position);
+ position = fileSize;
+ }
+ md.update(bb);
+ }
+ }
+ long end = System.currentTimeMillis();
+ if (debug)
+ System.out.println((end - begin) + " ms / " + ((end - begin) / 1000) + " s");
+ return md.digest();
+ } catch (NoSuchAlgorithmException e) {
+ throw new IllegalArgumentException("Cannot digest " + file + " with algorithm " + algorithm, e);
+ } catch (IOException e) {
+ throw new RuntimeException("Cannot digest " + file + " with algorithm " + algorithm, e);
}
}
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";
}
}
- final private static char[] hexArray = "0123456789ABCDEF".toCharArray();
-
- /**
- * From
- * http://stackoverflow.com/questions/9655181/how-to-convert-a-byte-array-to
- * -a-hex-string-in-java
- */
- private static String encodeHexString(byte[] bytes) {
- char[] hexChars = new char[bytes.length * 2];
- for (int j = 0; j < bytes.length; j++) {
- int v = bytes[j] & 0xFF;
- hexChars[j * 2] = hexArray[v >>> 4];
- hexChars[j * 2 + 1] = hexArray[v & 0x0F];
- }
- return new String(hexChars);
+ /** @deprecated Use {@link BytesUtils#toHexString(byte[])} instead */
+ @Deprecated
+ public static String encodeHexString(byte[] bytes) {
+ return BytesUtils.toHexString(bytes);
}
}
projects / lgpl / argeo-commons.git / blobdiff