java DES 加密和解密
代码如下
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
import java.security.Key;
import java.util.Base64;public class DESUtil {/*** 偏移变量，固定占8位字节*/private final static String IV_PARAMETER = "12345678";/*** 密钥算法*/private static final String ALGORITHM = "DES";/*** 加密/解密算法-工作模式-填充模式* DES共有四种工作模式-->>ECB：电子密码本模式、CBC：加密分组链接模式、CFB：加密反馈模式、OFB：输出反馈模式*/private static final String CIPHER_ALGORITHM = "DES/CBC/PKCS5Padding";/*** 默认编码*/private static final String CHARSET = "utf-8";/*** 生成key** @param password 密钥字符串* @return 密钥对象* @throws Exception*/private static Key generateKey(String password) throws Exception {DESKeySpec dks = new DESKeySpec(password.getBytes(CHARSET));SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);return keyFactory.generateSecret(dks);}/*** DES加密字符串** @param password 加密密码，长度不能够小于8位* @param data 待加密字符串* @return 加密后内容(十六进制字符串)*/public static String encrypt(String password, String data) {if (password == null || password.length() < 8) {throw new RuntimeException("加密失败，key不能小于8位");}if (data == null)return null;try {Key secretKey = generateKey(password);Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes(CHARSET));cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);byte[] bytes = cipher.doFinal(data.getBytes(CHARSET));//return new String(Base64.getEncoder().encode(bytes));return byte2HexString(bytes);} catch (Exception e) {e.printStackTrace();return data;}}/*** DES解密字符串** @param password 解密密码，长度不能够小于8位* @param data 待解密字符串(十六进制字符串)* @return 解密后内容*/public static String decrypt(String password, String data) {if (password == null || password.length() < 8) {throw new RuntimeException("加密失败，key不能小于8位");}if (data == null)return null;try {Key secretKey = generateKey(password);Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes(CHARSET));cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);byte[] bytes = hexStringToByteArray(data);return new String(cipher.doFinal(bytes), CHARSET);//return new String(cipher.doFinal(Base64.getDecoder().decode(data.getBytes(CHARSET))));} catch (Exception e) {e.printStackTrace();return data;}}/*** byte数组转十六进制** @param bytes* @return*/public static String byte2HexString(byte[] bytes) {StringBuilder hex = new StringBuilder();if (bytes != null) {for (Byte b : bytes) {hex.append(String.format("%02X", b.intValue() & 0xFF));}}return hex.toString();}/*** 十六进制转byte数组** @param s* @return*/public static byte[] hexStringToByteArray(String s) {int len = s.length();byte[] data = new byte[len / 2];try {for (int i = 0; i < len; i += 2) {data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)+ Character.digit(s.charAt(i + 1), 16));}} catch (Exception e) {e.printStackTrace();}return data;}//测试public static void main(String[] args) throws Exception {String source = "admin测试信息1234!@#$%^&*()_+";System.out.println("原 文: " + source);String password = "lw112190@2023";String encryptData = encrypt(password, source);System.out.println("加密后: " + encryptData);String decryptData = decrypt(password, encryptData);System.out.println("解密后: " + decryptData);}
}测试信息
原 文: admin测试信息1234!@#$%^&*()_+
加密后: 1D5C21B694A9085A69BE7EA37C197D1632239545298613B944C3AC272750A519F66FB43EFEC55C89
解密后: admin测试信息1234!@#$%^&*()_+本文来自互联网用户投稿，文章观点仅代表作者本人，不代表本站立场，不承担相关法律责任。如若转载，请注明出处。 如若内容造成侵权/违法违规/事实不符，请点击【内容举报】进行投诉反馈！