java实现RSA+AES的简单加密解密

TestAesAndRsa

package com.zhuyun.test;
 
import java.security.KeyPair;
import java.security.PrivateKey;
import java.security.PublicKey;
 
import javax.crypto.SecretKey;
 
import org.junit.Test;
 
import com.zhuyun.aes.AESUtil;
import com.zhuyun.rsa.RSAUtil;
 
public class TestAesAndRsa {
 
    //测试RSA与AES的结合。
    //                  客户端用公钥加密AES秘钥，AES秘钥加密实际内容；
    //                  服务端用私钥解密AES秘钥，AES秘钥解密实际内容
    @Test
    public void testAesAndRsa() throws Exception {
        //===============生成公钥和私钥，公钥传给客户端，私钥服务端保留==================
        //生成RSA公钥和私钥，并Base64编码，生成一次以后，就写死在配置文件或代码中，下次不再重新生成
        KeyPair keyPair = RSAUtil.getKeyPair();
        String publicKeyStr = RSAUtil.getPublicKey(keyPair);
        String privateKeyStr = RSAUtil.getPrivateKey(keyPair);
        System.out.println("RSA公钥Base64编码:" + publicKeyStr);
        System.out.println("RSA私钥Base64编码:" + publicKeyStr);
        
        //=================客户端=================
        //hello, i am infi, good night!  需要加密的实际内容
        String message = "hello, i am infi, good night!";
        //将Base64编码后的公钥转换成PublicKey对象
        PublicKey publicKey = RSAUtil.string2PublicKey(publicKeyStr);
        //生成AES秘钥，并Base64编码
        String aesKeyStr = AESUtil.genKeyAES();
        System.out.println("AES秘钥Base64编码:" + aesKeyStr);
        //用公钥加密AES秘钥
        byte[] publicEncrypt = RSAUtil.publicEncrypt(aesKeyStr.getBytes(), publicKey);
        //公钥加密AES秘钥后的内容Base64编码
        String publicEncryptStr = RSAUtil.byte2Base64(publicEncrypt);
        System.out.println("公钥加密AES秘钥并Base64编码的结果：" + publicEncryptStr);
        
        //将Base64编码后的AES秘钥转换成SecretKey对象
        SecretKey aesKey = AESUtil.loadKeyAES(aesKeyStr);
        //用AES秘钥加密实际的内容
        byte[] encryptAES = AESUtil.encryptAES(message.getBytes(), aesKey);
        //AES秘钥加密后的内容Base64编码
        String encryptAESStr = AESUtil.byte2Base64(encryptAES);
        System.out.println("AES秘钥加密实际的内容并Base64编码的结果：" + encryptAESStr);
        
        
        //##############    网络上传输的内容有Base64编码后的公钥加密AES秘钥的结果 和 Base64编码后的AES秘钥加密实际内容的结果   #################
        //##############    即publicEncryptStr和encryptAESStr ###################
        
        
        //===================服务端================
        //将Base64编码后的私钥转换成PrivateKey对象
        PrivateKey privateKey = RSAUtil.string2PrivateKey(privateKeyStr);
        //公钥加密AES秘钥后的内容(Base64编码)，进行Base64解码
        byte[] publicEncrypt2 = RSAUtil.base642Byte(publicEncryptStr);
        //用私钥解密,得到aesKey
        byte[] aesKeyStrBytes = RSAUtil.privateDecrypt(publicEncrypt2, privateKey);
        //解密后的aesKey
        String aesKeyStr2 = new String(aesKeyStrBytes);
        System.out.println("解密后的aesKey(Base64编码): " + aesKeyStr2);
        
        //将Base64编码后的AES秘钥转换成SecretKey对象
        SecretKey aesKey2 = AESUtil.loadKeyAES(aesKeyStr2);
        //AES秘钥加密后的内容(Base64编码)，进行Base64解码
        byte[] encryptAES2 = AESUtil.base642Byte(encryptAESStr);
        //用AES秘钥解密实际的内容
        byte[] decryptAES = AESUtil.decryptAES(encryptAES2, aesKey2);
        //解密后的实际内容
        System.out.println("解密后的实际内容: " + new String(decryptAES));
        
    }
 
}

关于RSAUtil 和AESUtil这两个类，详见我的前面两篇博客《java实现RSA的简单加密解密》和 《java实现AES的简单加密解密》

运行结果如下：

RSA公钥Base64编码:MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3edVb1wjqKNucCPW7/0Ct4lFBVdEVZyD
tT+cbzncvnHokEzNj2bRUSk0sR4YBUscPyR5H8c5p2MgRcuLLMWzXBpUS4TO+NHfLzzj30WPcqIL
MaO6nIMCqH6zn3Bz0my56Gx7hHUI+D7ija/JtroLQiI9Z69pljtxjEfX7Oa7EgDWc0uhPh+grhHD
LCsdibn5Czpc+GkkRYOV9iPIaia3+h2Eqyj9WOOxd6czsgGEjO8+g28Kl7CLKzwE1RUYEZmu+Tch
U2417ejpAjyhR/2rdE1l9US75Tz0/6RFDCTTo13ZLsN/PSVfyZtZ0CLjsCAjimDq2GR1qVU0K7XE
SBrDuwIDAQAB
RSA私钥Base64编码:MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQDd51VvXCOoo25wI9bv/QK3iUUF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AES秘钥Base64编码:3aNZH0W9NAeFAJx66rf/Pw==
公钥加密AES秘钥并Base64编码的结果：A17kkwTbz7p7UP6Z56cau3f0OoF+yZCngbJTQDUUsGwdj89alHIKg05tT7t4Nh8hq7l/1KkhNw6Y
RWiQ3LmoU55H82xzZWpj19YzqDCNyceIJKO7YafYI40uqiBrzSX9ruwrNMlv9AQi8RYKcXzX/89E
BJuSHSOttfgoXaEOmqgNDNAeipqMxHMCrqi4D6ST32WpttKlYm9NsxgqDuUfLrXQRoPusUfPk1ZI
N4mVvHX39n+WuOfMLjo2BGXddyDj8p6I3dD2v7OiLC5wiB6LYlB6yftX2xLdy077FpkJW6yyki2Y
O+mktov3ZSRflgBn5mjnGagJeqw5PXj4F3uo0w==
AES秘钥加密实际的内容并Base64编码的结果：z307ajQDSY6zC9WyPMOZiUvPyRZWUbJv2k44Ee3/kiQ=
解密后的aesKey(Base64编码): 3aNZH0W9NAeFAJx66rf/Pw==
解密后的实际内容: hello, i am infi, good night!