android java 3des加密 ECB/CBC

缺乏、安全感 2022-08-26 04:54 151阅读 0赞

import java.security.Key;
    import javax.crypto.Cipher;
    import javax.crypto.SecretKeyFactory;
    import javax.crypto.spec.DESedeKeySpec;
    import javax.crypto.spec.IvParameterSpec;
    
    import android.util.Base64;
    
    public class Des3 {
    public Des3() throws Exception {
    //密钥
    byte[] key=Base64.decode("12345678901234567890123456789000", Base64.DEFAULT);
    byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };
    //原始数据
    String mainStr = "达达ABCacb123";
    //原始数据转byte
    byte[] data = mainStr.getBytes("UTF-8");
    System.out.println("原始数据:" + mainStr);
    System.out.println("ECB加密解密");
    //加密后的byte[]
    byte[] encodeByte_ECB = des3EncodeECB(key, data);
    //加密后的String   需把加密的byte[]转base64
    String encodeString_ECB =Base64.encodeToString(encodeByte_ECB, Base64.DEFAULT);
    System.out.println("加密的数据是:" + encodeString_ECB);
    //解密后的原始byte[] 需把加密后的byte[]转bass64
    byte[] decodeByteMain_ECB=Base64.decode(encodeString_ECB, Base64.DEFAULT);
    //解密后的byte[]
    byte[] decodeByte_ECB = ees3DecodeECB(key, decodeByteMain_ECB);
    //解密后的String
    String decodeString_ECB = new String(decodeByte_ECB, "UTF-8");
    System.out.println("解密后的数据是:" + decodeString_ECB);
    System.out.println("CBC加密解密");
    //加密后的byte[]
    byte[] encodeByte_CBC = des3EncodeCBC(key, keyiv,data);
    //加密后的String   需把加密的byte[]转base64
    String encodeString_CBC =Base64.encodeToString(encodeByte_CBC, Base64.DEFAULT);
    System.out.println("加密的数据是:" + encodeString_CBC);
    //解密后的原始byte[] 需把加密后的byte[]转bass64
    byte[] decodeByteMain_CBC=Base64.decode(encodeString_CBC, Base64.DEFAULT);
    //解密后的byte[]
    byte[] decodeByte_CBC = des3DecodeCBC(key, keyiv, decodeByteMain_CBC);
    //解密后的String
    String decodeString_CBC = new String(decodeByte_CBC, "UTF-8");
    System.out.println("解密后的数据是:" + decodeString_CBC);
    }
    
    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;
    }
    
    public static byte[] ees3DecodeECB(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;
    
    }
    
        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;
        }
    
       
        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;
    
        }
    }

**转载自：http://blog.sina.com.cn/s/blog\_677fb16e01018eqw.html**