Java RSA 非对称加密算法实践

使用hutool工具类

 public static void main(String[] args) {

        String publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDMudlRns6vTO0Z2G/Wwbk2Ey+z\n" +
                "xxMHlbiMSpDJiFMytHcZXgP6v1PBwW1cOzc4k6SISYxTwhggo0rtxTaj/XCUdHHK\n" +
                "rxdQGAQnwhg8c633xR1ezclEtF0jRZTYEAQLM/m6USEw/DdoMoGyQxP1GeaiSvDf\n" +
                "tgvi9fWa6viZtmPu4wIDAQAB";

        String privateKey = "MIICeAIBADANBgkqhkiG9w0BAQEFAASCAmIwggJeAgEAAoGBAMy52VGezq9M7RnY\n" +
                "b9bBuTYTL7PHEweVuIxKkMmIUzK0dxleA/q/U8HBbVw7NziTpIhJjFPCGCCjSu3F\n" +
                "NqP9cJR0ccqvF1AYBCfCGDxzrffFHV7NyUS0XSNFlNgQBAsz+bpRITD8N2gygbJD\n" +
                "E/UZ5qJK8N+2C+L19Zrq+Jm2Y+7jAgMBAAECgYEAo9tkSuWWe8xQQU1wRi0LdnJo\n" +
                "zbVaT8nPycmslQEdxgmXAaC0Aq+78+pDA30Jt6jEGaj0Pd2tvgG0aRZdo2eoAFoT\n" +
                "gtHWmSWcLz8gFRGbD5IQ4acuQZ17uRGznn37L5rDBA/DWqUFFPlyERAX2HGyArA2\n" +
                "uuKTwlyvnES+FsDbRCECQQD7hm61VxMqAmssEKotpcUqs18MDr665rJwoIru9oSO\n" +
                "P+P5D9JB/zENofjmryLy0FvL+tBOOtSQr7GHO2f65id7AkEA0F5FN11iXKP1jeHp\n" +
                "qis20vx5FbjNMQZubHhMJSxr3RY/8Zm1cRUOejfr33qOToJbN6GQbc6DiM2TAO1n\n" +
                "7iQFuQJAe8PShfiqvWkjQzOQCZYgRrqsckpvH5iVBUZ6FsvGvhhCHTPjygXAJW0m\n" +
                "BJz5HXHZOa3ZAiWAoxFQ0bIxoAvQMQJBAJ3Y/FhfvvbtIkUUgf3udL7KkjPZZmAg\n" +
                "PiCf1RdIGoJGq7QrvB7pU6lUmbQXVJy29cEj/JSioFRPX3CRaG0oDskCQQDvbis3\n" +
                "pnPIuEVXsL7Vl8YLNEfhua1N+9VQySDq4Hw7zEWf9tw4sfh0AeqModCYgZTItpQX\n" +
                "EGcvDLBEZygc89it";


        Map<String, Object> map = new TreeMap<>();
        map.put("timestamp", System.currentTimeMillis() + "");
        map.put("userId", "66666");
        map.put("platformOrderNo", "12345");
        // 由调用方传入
        map.put("platformOrderStatus", "100");
        // 构建 sign
        StringBuilder sb = new StringBuilder();
        map.forEach((k, v) -> sb.append(k).append("=").append(v).append("&"));
        sb.deleteCharAt(sb.length() - 1);
        String sign = DigestUtils.md5DigestAsHex(sb.toString().getBytes());
        map.put("sign", sign);
        String bodyJson = JSONObject.toJSONString(map);
        System.out.println(bodyJson);

        System.out.println("===========后端公钥加密，前端私钥解密==========");

        String encrypt = SecureUtil.rsa(null, publicKey).encryptBase64(bodyJson.getBytes(), KeyType.PublicKey);
        System.out.println(encrypt);
        String s = SecureUtil.rsa(privateKey, null).decryptStr(encrypt, KeyType.PrivateKey);
        System.out.println(s);

        System.out.println("===========前端私钥加密，后端公钥解密==========");

        String b = SecureUtil.rsa(privateKey, null).encryptBase64(bodyJson, KeyType.PrivateKey);
        System.out.println(b);
        String a = SecureUtil.rsa(null, publicKey).decryptStr(b, KeyType.PublicKey);
        System.out.println(a);


    }