IDEA加密算法（含所需jar包（commons-codec-1.11.jar ,bcprov-jdk15on-160.jar））

軟件設計上機實驗IDEA算法：

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import org.apache.commons.codec.binary.Base64;
import org.bouncycastle.jce.provider.BouncyCastleProvider;



import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.security.Key;
import java.security.Security;


public class IDEA implements algorithm{
    public void speak(String value) {
        String data = "20173599 周博";
        data=value;
        String key = getKey();
        System.out.println("要加密的原文："+data);
        System.out.println("密鑰：" + key);
        String data_en = ideaEncrypt(data, key);
        System.out.println("密文："+data_en);
        String data_de = ideaDecrypt(data_en, key);
        System.out.println("原文："+data_de);
    }
    
     public static final String KEY_ALGORITHM="IDEA";

        public static final String CIPHER_ALGORITHM="IDEA/ECB/ISO10126Padding";
        public static byte[] initkey() throws Exception{
            //加入bouncyCastle支持
            Security.addProvider(new BouncyCastleProvider());

            //實例化密鑰生成器
            KeyGenerator kg=KeyGenerator.getInstance(KEY_ALGORITHM);
            //初始化密鑰生成器，IDEA要求密鑰長度為128位
            kg.init(128);
            //生成密鑰
            SecretKey secretKey=kg.generateKey();
            //獲取二進制密鑰編碼形式
            return secretKey.getEncoded();
        }
        /**
         * 轉換密鑰
         * @param key 二進制密鑰
         * @return Key 密鑰
         * */
        private static Key toKey(byte[] key) throws Exception{
            //實例化DES密鑰
            //生成密鑰
            SecretKey secretKey=new SecretKeySpec(key,KEY_ALGORITHM);
            return secretKey;
        }

        /**
         * 加密數據
         * @param data 待加密數據
         * @param key 密鑰
         * @return byte[] 加密后的數據
         * */
        private static byte[] encrypt(byte[] data,byte[] key) throws Exception{
            //加入bouncyCastle支持
            Security.addProvider(new BouncyCastleProvider());
            //還原密鑰
            Key k=toKey(key);
            //實例化
            Cipher cipher=Cipher.getInstance(CIPHER_ALGORITHM);
            //初始化，設置為加密模式
            cipher.init(Cipher.ENCRYPT_MODE, k);
            //執行操作
            return cipher.doFinal(data);
        }
        /**
         * 解密數據
         * @param data 待解密數據
         * @param key 密鑰
         * @return byte[] 解密后的數據
         * */
        private static byte[] decrypt(byte[] data,byte[] key) throws Exception{
            //加入bouncyCastle支持
            Security.addProvider(new BouncyCastleProvider());
            //還原密鑰
            Key k =toKey(key);
            Cipher cipher=Cipher.getInstance(CIPHER_ALGORITHM);
            //初始化，設置為解密模式
            cipher.init(Cipher.DECRYPT_MODE, k);
            //執行操作
            return cipher.doFinal(data);
        }
        public static String getKey(){
            String result = null;
            try {
                result = Base64.encodeBase64String(initkey());
            } catch (Exception e) {
                e.printStackTrace();
            }
            return result;
        }
        public static String ideaEncrypt(String data, String key) {
            String result = null;
            try {
                byte[] data_en = encrypt(data.getBytes(), Base64.decodeBase64(key));
                result = Base64.encodeBase64String(data_en);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return result;
        }

        public static String ideaDecrypt(String data, String key) {
            String result = null;
            try {
                byte[] data_de =decrypt(Base64.decodeBase64(data), Base64.decodeBase64(key));;
                result = new String(data_de);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return result;
        }
     

    

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("IDEA加密算法");
        IDEA idea=new IDEA();
         try
         {    
             idea.speak("20173599 周博");
         }
         catch(Exception e)
         {
             System.out.println(e.getMessage());
         }
    }

}

jar包下載地址：

https://pan.baidu.com/s/16YvZIXsGBRtFjQqrTAGvdQ

提取密碼：ynnz