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76 lines
2.3 KiB
76 lines
2.3 KiB
/*
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* Mint, (C) 2018 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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*
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package io.minio.awssdk.tests;
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import java.io.*;
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import java.nio.channels.*;
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import java.security.*;
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class Utils {
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public static byte[] createChecksum(InputStream is, int skip, int length) throws Exception {
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int numRead;
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byte[] buffer = new byte[1024];
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MessageDigest complete = MessageDigest.getInstance("MD5");
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if (skip > -1 && length > -1) {
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is = new LimitedInputStream(is, skip, length);
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}
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do {
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numRead = is.read(buffer);
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if (numRead > 0) {
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complete.update(buffer, 0, numRead);
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}
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} while (numRead != -1);
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return complete.digest();
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}
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public static String getInputStreamMD5(InputStream is) throws Exception {
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return getInputStreamMD5(is, -1, -1);
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}
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public static String getInputStreamMD5(InputStream is, int start, int length) throws Exception {
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byte[] b = createChecksum(is, start, length);
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String result = "";
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for (int i=0; i < b.length; i++) {
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result += Integer.toString( ( b[i] & 0xff ) + 0x100, 16).substring( 1 );
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}
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return result;
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}
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public static String getFileMD5(String filePath) throws Exception {
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return getFileMD5(filePath, -1, -1);
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}
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public static String getFileMD5(String filePath, int start, int length) throws Exception {
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File f = new File(filePath);
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InputStream is = new FileInputStream(f);
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return getInputStreamMD5(is, start, length);
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}
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public static String getBufferMD5(byte[] data) throws Exception {
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ByteArrayInputStream bis = new ByteArrayInputStream(data);
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return getInputStreamMD5(bis);
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}
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}
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