JAVA 3DES加密解密工具类

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最新推荐文章于 2025-07-14 00:15:00 发布

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本文链接：https://blog.youkuaiyun.com/qq_44894516/article/details/89386422

本文展示了一个使用Java实现的DESede(三重DES)加密和解密算法的示例，包括ECB和CBC两种模式。代码中详细展示了如何生成密钥、初始化Cipher对象以及进行加密和解密操作。

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package zmx.code.test;import java.security.Key;import javax.crypto.Cipher;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESedeKeySpec;import javax.crypto.spec.IvParameterSpec;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;public class DESUtils {    public static void main(String[] args) throws Exception {        byte[] key=new BASE64Decoder().decodeBuffer("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4");        byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };                byte[] data="中国ABCabc123".getBytes("UTF-8");                System.out.println("ECB加密解密");        byte[] str3 = des3EncodeECB(key,data );        byte[] str4 = des3DecodeECB(key,str3);        System.out.println(new BASE64Encoder().encode(str3));        System.out.println(new String(str4, "UTF-8"));        System.out.println("-----------------------------");        System.out.println("CBC加密解密");        byte[] str5 = des3EncodeCBC(key, keyiv, data);        byte[] str6 = des3DecodeCBC(key, keyiv, str5);        System.out.println(new BASE64Encoder().encode(str5));        System.out.println(new String(str6, "UTF-8"));    }    /**     * ECB加密,不要IV     * @param key 密钥     * @param data 明文     * @return Base64编码的密文     * @throws Exception     */    public static byte[] des3EncodeECB(byte[] key, byte[] data)            throws Exception {        Key deskey = null;        DESedeKeySpec spec = new DESedeKeySpec(key);        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");        deskey = keyfactory.generateSecret(spec);        Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");        cipher.init(Cipher.ENCRYPT_MODE, deskey);        byte[] bOut = cipher.doFinal(data);        return bOut;    }    /**     * ECB解密,不要IV     * @param key 密钥     * @param data Base64编码的密文     * @return 明文     * @throws Exception     */    public static byte[] des3DecodeECB(byte[] key, byte[] data)            throws Exception {        Key deskey = null;        DESedeKeySpec spec = new DESedeKeySpec(key);        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");        deskey = keyfactory.generateSecret(spec);        Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");        cipher.init(Cipher.DECRYPT_MODE, deskey);        byte[] bOut = cipher.doFinal(data);        return bOut;    }    /**     * CBC加密     * @param key 密钥     * @param keyiv IV     * @param data 明文     * @return Base64编码的密文     * @throws Exception     */    public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data)            throws Exception {        Key deskey = null;        DESedeKeySpec spec = new DESedeKeySpec(key);        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");        deskey = keyfactory.generateSecret(spec);        Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");        IvParameterSpec ips = new IvParameterSpec(keyiv);        cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);        byte[] bOut = cipher.doFinal(data);        return bOut;    }    /**     * CBC解密     * @param key 密钥     * @param keyiv IV     * @param data Base64编码的密文     * @return 明文     * @throws Exception     */    public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data)            throws Exception {        Key deskey = null;        DESedeKeySpec spec = new DESedeKeySpec(key);        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");        deskey = keyfactory.generateSecret(spec);        Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");        IvParameterSpec ips = new IvParameterSpec(keyiv);        cipher.init(Cipher.DECRYPT_MODE, deskey, ips);        byte[] bOut = cipher.doFinal(data);        return bOut;    }}