-/*
- * 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
+ // 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 byte[] digestRaw(String algorithm, Path file, long bufferSize) {
+ 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);
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);
if (debug)
System.out.println((end - begin) + " ms / " + ((end - begin) / 1000) + " s");
return md.digest();
- } catch (Exception e) {
- throw new UtilsException("Cannot digest " + file + " with algorithm " + algorithm, e);
+ } 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
- */
- public static String encodeHexString(byte[] bytes) {
+ /** Converts a byte array to an hex String. */
+ public static String toHexString(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
for (int j = 0; j < bytes.length; j++) {
int v = bytes[j] & 0xFF;
projects / lgpl / argeo-commons.git / blobdiff