| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.eclipse.aether.util; |
| |
| import java.io.BufferedReader; |
| import java.io.ByteArrayInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.nio.charset.StandardCharsets; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.util.Collection; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| |
| /** |
| * A utility class to assist in the verification and generation of checksums. |
| * |
| * @deprecated The use of class should be avoided, see {@link StringDigestUtil} and file processor in SPI module. |
| */ |
| @Deprecated |
| public final class ChecksumUtils { |
| |
| private ChecksumUtils() { |
| // hide constructor |
| } |
| |
| /** |
| * Extracts the checksum from the specified file. |
| * |
| * @param checksumFile The path to the checksum file, must not be {@code null}. |
| * @return The checksum stored in the file, never {@code null}. |
| * @throws IOException If the checksum does not exist or could not be read for other reasons. |
| * @deprecated Use SPI FileProcessor to read and write checksum files. |
| */ |
| @Deprecated |
| public static String read(File checksumFile) throws IOException { |
| String checksum = ""; |
| try (BufferedReader br = new BufferedReader( |
| new InputStreamReader(new FileInputStream(checksumFile), StandardCharsets.UTF_8), 512)) { |
| while (true) { |
| String line = br.readLine(); |
| if (line == null) { |
| break; |
| } |
| line = line.trim(); |
| if (!line.isEmpty()) { |
| checksum = line; |
| break; |
| } |
| } |
| } |
| |
| if (checksum.matches(".+= [0-9A-Fa-f]+")) { |
| int lastSpacePos = checksum.lastIndexOf(' '); |
| checksum = checksum.substring(lastSpacePos + 1); |
| } else { |
| int spacePos = checksum.indexOf(' '); |
| |
| if (spacePos != -1) { |
| checksum = checksum.substring(0, spacePos); |
| } |
| } |
| |
| return checksum; |
| } |
| |
| /** |
| * Calculates checksums for the specified file. |
| * |
| * @param dataFile The file for which to calculate checksums, must not be {@code null}. |
| * @param algos The names of checksum algorithms (cf. {@link MessageDigest#getInstance(String)} to use, must not be |
| * {@code null}. |
| * @return The calculated checksums, indexed by algorithm name, or the exception that occurred while trying to |
| * calculate it, never {@code null}. |
| * @throws IOException If the data file could not be read. |
| * @deprecated Use SPI checksum selector instead. |
| */ |
| @Deprecated |
| public static Map<String, Object> calc(File dataFile, Collection<String> algos) throws IOException { |
| return calc(new FileInputStream(dataFile), algos); |
| } |
| |
| /** |
| * @deprecated Use SPI checksum selector instead. |
| */ |
| @Deprecated |
| public static Map<String, Object> calc(byte[] dataBytes, Collection<String> algos) throws IOException { |
| return calc(new ByteArrayInputStream(dataBytes), algos); |
| } |
| |
| private static Map<String, Object> calc(InputStream data, Collection<String> algos) throws IOException { |
| Map<String, Object> results = new LinkedHashMap<>(); |
| |
| Map<String, MessageDigest> digests = new LinkedHashMap<>(); |
| for (String algo : algos) { |
| try { |
| digests.put(algo, MessageDigest.getInstance(algo)); |
| } catch (NoSuchAlgorithmException e) { |
| results.put(algo, e); |
| } |
| } |
| |
| try (InputStream in = data) { |
| for (byte[] buffer = new byte[32 * 1024]; ; ) { |
| int read = in.read(buffer); |
| if (read < 0) { |
| break; |
| } |
| for (MessageDigest digest : digests.values()) { |
| digest.update(buffer, 0, read); |
| } |
| } |
| } |
| |
| for (Map.Entry<String, MessageDigest> entry : digests.entrySet()) { |
| byte[] bytes = entry.getValue().digest(); |
| |
| results.put(entry.getKey(), toHexString(bytes)); |
| } |
| |
| return results; |
| } |
| |
| /** |
| * Creates a hexadecimal representation of the specified bytes. Each byte is converted into a two-digit hex number |
| * and appended to the result with no separator between consecutive bytes. |
| * |
| * @param bytes The bytes to represent in hex notation, may be be {@code null}. |
| * @return The hexadecimal representation of the input or {@code null} if the input was {@code null}. |
| */ |
| @SuppressWarnings("checkstyle:magicnumber") |
| public static String toHexString(byte[] bytes) { |
| return StringDigestUtil.toHexString(bytes); |
| } |
| |
| /** |
| * Creates a byte array out of hexadecimal representation of the specified bytes. If input string is {@code null}, |
| * {@code null} is returned. Input value must have even length (due hex encoding = 2 chars one byte). |
| * |
| * @param hexString The hexString to convert to byte array, may be {@code null}. |
| * @return The byte array of the input or {@code null} if the input was {@code null}. |
| * @since 1.8.0 |
| */ |
| @SuppressWarnings("checkstyle:magicnumber") |
| public static byte[] fromHexString(String hexString) { |
| return StringDigestUtil.fromHexString(hexString); |
| } |
| } |