81 lines
2.8 KiB
Java
81 lines
2.8 KiB
Java
package com.onekeycall.videotablet.utils;
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import javax.crypto.Cipher;
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import javax.crypto.spec.SecretKeySpec;
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import java.nio.charset.StandardCharsets;
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import java.util.Base64;
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public class AESUtil {
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// 使用ECB模式（无需IV）
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private static final String ALGORITHM = "AES/ECB/PKCS5Padding";
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// 密钥长度要求：128/192/256位（16/24/32字节）
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private static final int KEY_LENGTH = 32; // 256位密钥
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// 从环境变量获取密钥（生产环境推荐）
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// private static final String SECRET_KEY = System.getenv("AES_KEY");
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// 测试用密钥（确保长度符合要求）
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private static final String SECRET_KEY = "dasdasdasdawqeq12345312gs6h092fs";
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/**
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* 加密方法（ECB模式）
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* @param plaintext 明文
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* @return Base64编码的密文
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*/
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public static String encrypt(String plaintext) {
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try {
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// 验证密钥长度
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validateKey();
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// 初始化加密器
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Cipher cipher = Cipher.getInstance(ALGORITHM);
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SecretKeySpec keySpec = new SecretKeySpec(SECRET_KEY.getBytes(StandardCharsets.UTF_8), "AES");
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cipher.init(Cipher.ENCRYPT_MODE, keySpec);
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// 加密数据
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byte[] encrypted = cipher.doFinal(plaintext.getBytes(StandardCharsets.UTF_8));
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return Base64.getEncoder().encodeToString(encrypted);
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} catch (Exception e) {
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throw new RuntimeException("加密失败", e);
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}
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}
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/**
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* 解密方法（ECB模式）
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* @param ciphertext Base64编码的密文
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* @return 解密后的明文
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*/
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public static String decrypt(String ciphertext) {
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try {
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// 验证密钥长度
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validateKey();
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// 初始化解密器
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Cipher cipher = Cipher.getInstance(ALGORITHM);
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SecretKeySpec keySpec = new SecretKeySpec(SECRET_KEY.getBytes(StandardCharsets.UTF_8), "AES");
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cipher.init(Cipher.DECRYPT_MODE, keySpec);
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// 解密数据
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byte[] decodedBytes = Base64.getDecoder().decode(ciphertext);
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byte[] decrypted = cipher.doFinal(decodedBytes);
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return new String(decrypted, StandardCharsets.UTF_8);
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} catch (Exception e) {
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throw new RuntimeException("解密失败", e);
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}
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}
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/**
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* 验证密钥长度是否符合要求
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*/
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private static void validateKey() {
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byte[] keyBytes = SECRET_KEY.getBytes(StandardCharsets.UTF_8);
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if (keyBytes.length != 16 && keyBytes.length != 24 && keyBytes.length != 32) {
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throw new IllegalArgumentException("无效的密钥长度。AES要求密钥长度为16(128位)、24(192位)或32字节(256位)。"
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+ "当前长度: " + keyBytes.length + "字节");
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}
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}
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}
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