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115 lines
3.3 KiB
Java
115 lines
3.3 KiB
Java
/*
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* Copyright 2025 mingliqiye
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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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* 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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* ProjectName mingli-utils
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* ModuleName mingli-utils.main
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* CurrentFile HashUtils.java
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* LastUpdate 2025-09-09 08:37:33
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* UpdateUser MingLiPro
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*/
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package com.mingliqiye.utils.hash;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.Security;
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import org.bouncycastle.jce.provider.BouncyCastleProvider;
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import org.mindrot.jbcrypt.BCrypt;
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/**
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* 提供常用的哈希计算工具方法，包括文件哈希值计算、BCrypt 加密等。
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*
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* @author MingLiPro
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*/
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public class HashUtils {
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static {
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Security.addProvider(new BouncyCastleProvider());
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}
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/**
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* 计算指定文件的哈希值。
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*
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* @param file 要计算哈希值的文件对象
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* @param algorithm 使用的哈希算法名称（如 SHA-256、MD5 等）
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* @return 文件的十六进制格式哈希值字符串
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* @throws IOException 当文件不存在或读取过程中发生 I/O 错误时抛出
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* @throws NoSuchAlgorithmException 当指定的哈希算法不可用时抛出
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*/
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public static String calculateFileHash(File file, String algorithm)
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throws IOException, NoSuchAlgorithmException {
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// 检查文件是否存在
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if (!file.exists()) {
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throw new IOException("File not found: " + file.getAbsolutePath());
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}
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MessageDigest digest = MessageDigest.getInstance(algorithm);
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try (FileInputStream fis = new FileInputStream(file)) {
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byte[] buffer = new byte[8192];
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int bytesRead;
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// 分块读取文件内容并更新摘要
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while ((bytesRead = fis.read(buffer)) != -1) {
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digest.update(buffer, 0, bytesRead);
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}
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}
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return bytesToHex(digest.digest());
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}
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/**
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* 将字节数组转换为十六进制字符串表示。
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*
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* @param bytes 输入的字节数组
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* @return 对应的十六进制字符串
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*/
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private static String bytesToHex(byte[] bytes) {
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StringBuilder hexString = new StringBuilder(2 * bytes.length);
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for (byte b : bytes) {
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String hex = Integer.toHexString(0xff & b);
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if (hex.length() == 1) {
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hexString.append('0');
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}
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hexString.append(hex);
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}
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return hexString.toString();
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}
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/**
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* 使用 BCrypt 算法对字符串进行加密。
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*
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* @param string 需要加密的明文字符串
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* @return 加密后的 BCrypt 哈希字符串
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*/
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public static String bcrypt(String string) {
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return BCrypt.hashpw(string, BCrypt.gensalt());
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}
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/**
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* 验证给定字符串与 BCrypt 哈希是否匹配。
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*
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* @param string 明文字符串
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* @param bcrypted 已经使用 BCrypt 加密的哈希字符串
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* @return 如果匹配返回 true，否则返回 false
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*/
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public static boolean checkBcrypt(String string, String bcrypted) {
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return BCrypt.checkpw(string, bcrypted);
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}
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}
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