java代码大全及详解 java非对称加密算法 _非对称

我们在做技术接口时，尤其对外提供时，为了提高服务接口的安全（防爆破，防重放，防篡改等）一般会采用接口验证的方式，但是在验证的时候为了提升参数请求前后的安全，我们会采用加密。普通加密基本都是对称的，不能逆向。
下面，我介绍一种RSA的算法，通过这个加密算法实现接口请求前后的数字签名验证。具体实现流程为：

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接口数字签名验证的而基本流程
【java代码大全及详解 java非对称加密算法】下面我将RSA的签名算法代码分享下，下载即用：

public class RSAEncrypt {private static Map<Integer, String> keyMap = new HashMap<Integer, String>();//用于封装随机产生的公钥与私钥private static String pirvateKey="MIIBUwIBADANBgkqhkiG9w0BAQEFAASCAT0wggE5AgEAAkEAgS8Vf8eKVf9YoqoyhFy4hHgYpNkSkrrmkJrfrKeZHfZWFx2cCoon74QZ3qw15VV9jMD5DWaPdMVAVx5HckNURwIDAQABAkBpS6Fwd4pwMiNi4usuLA1SHDmqFC0pYCISd8odBratTjRv6w9OH+A/CIKDir4DZ0PsS9qh0mxb0bthRQ9vS0wBAiEAx+y2VcrbnOZNQSWUONZcVKIHazkrAWXOBR8mQfJnOUcCIQClavCvg0SesKWv65vs2ZR0quQnaFdcCMh7B4GM2DCNAQIgAsXgvY3jv+hd1/J6fNNUUoQw0Cbp1sofsmh9Mlr3XY8CIFEyGex9Cay/VsTwaLws3PMbgxxY2jDB2u6Q86VX5RUBAiBhoiUOYrxrS77ifDFm1KYFHRPyZNStYJhcVu4U5kwwIA==";private static String publicKey="MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAIEvFX/HilX/WKKqMoRcuIR4GKTZEpK65pCa36ynmR32VhcdnAqKJ++EGd6sNeVVfYzA+Q1mj3TFQFceR3JDVEcCAwEAAQ==";private static String ssb="fSAUUCYm3FI3EYJWZRPXnI1dbwcLT3bFUqL5Wsdv24QtLmYmrN2i5WRKQgGxMTewRJ78Obf1Zke9rTpE+23zzw==";public static void main(String[] args) throws Exception {//生成公钥和私钥//genKeyPair();//String randomStr= RandomStrUtil.getRandom(24, RandomStrUtil.TYPE.LETTER_CAPITAL_NUMBER);String uuid=UUIDUtil.getUUID();String hashCode=String.valueOf(uuid.hashCode());System.out.println("hashcode="+hashCode);long time=System.currentTimeMillis();//System.out.println("随机hash"+hashCode);//加密字符串String message = time+"@=@"+uuid;//System.out.println("随机生成的公钥为:" + publicKey);//System.out.println("随机生成的私钥为:" + pirvateKey);String messageEn = encrypt(message,publicKey);System.out.println("加密后的字符串为:" + messageEn);String messageDe = decrypt(messageEn,pirvateKey);System.out.println("源文数据="+message);System.out.println("解密数据=" + messageDe);String bs=messageDe.split("@=@")[1];System.out.println(bs);}/*** 随机生成密钥对* @throws NoSuchAlgorithmException*/public static void genKeyPair() throws NoSuchAlgorithmException {// KeyPairGenerator类用于生成公钥和私钥对 ， 基于RSA算法生成对象KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA");// 初始化密钥对生成器 ， 密钥大小为96-1024位keyPairGen.initialize(1024,new SecureRandom());// 生成一个密钥对 ， 保存在keyPair中KeyPair keyPair = keyPairGen.generateKeyPair();// 得到私钥RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();// 得到公钥RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();String publicKeyString = new String(Base64.encodeBase64(publicKey.getEncoded()));System.out.println("公钥="+publicKeyString);// 得到私钥字符串String privateKeyString = new String(Base64.encodeBase64((privateKey.getEncoded())));System.out.println("私钥="+privateKeyString);// 将公钥和私钥保存到Map//0表示公钥keyMap.put(0,publicKeyString);//1表示私钥keyMap.put(1,privateKeyString);}/*** RSA公钥加密** @param str*加密字符串* @param publicKey*公钥* @return 密文* @throws Exception*加密过程中的异常信息*/public static String encrypt( String str, String publicKey ) throws Exception{//base64编码的公钥byte[] decoded = Base64.decodeBase64(publicKey);RSAPublicKey pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));//RSA加密Cipher cipher = Cipher.getInstance("RSA");cipher.init(Cipher.ENCRYPT_MODE, pubKey);String outStr = Base64.encodeBase64String(cipher.doFinal(str.getBytes("UTF-8")));return outStr;}/*** RSA私钥解密** @param str*加密字符串* @param privateKey*私钥* @return 铭文* @throws Exception*解密过程中的异常信息*/public static String decrypt(String str, String privateKey) throws Exception{//64位解码加密后的字符串byte[] inputByte = Base64.decodeBase64(str.getBytes("UTF-8"));//base64编码的私钥byte[] decoded = Base64.decodeBase64(privateKey);RSAPrivateKey priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));//RSA解密Cipher cipher = Cipher.getInstance("RSA");cipher.init(Cipher.DECRYPT_MODE, priKey);String outStr = new String(cipher.doFinal(inputByte));return outStr;}}