{
  "unit_id":"12345",
  "transaction_id":"10000000_1",
  "user_id":"buzzvil",
  "point": 1,
  "action_type":"won",
  "event_at": 1599622182,
  "title":"title",
  "extra": "{}"
}

import java.lang.RuntimeException;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.*;
import javax.crypto.spec.SecretKeySpec;
public class Main {
    public static void main(String[] args) {
        String aesKey = "BuzzvilAESKeyTest123456789101112";
        String aesIV = "0000000000000000";
        // Check to make sure encryption is compatible with Buzzvil
        String toBuzzvilMessage = "{\"success\": 1, \"reason\": \"중복 적립 요청\"}";
        String encrypted = encrypt(toBuzzvilMessage, aesKey, aesIV);
        System.out.println("----encrypted----\n"+encrypted);
        System.out.println("buzzvil encryption compatible? YES");
        // Check to make sure values coming from Buzzvil is decryptable
        String fromBuzzvilEncrypted = "IGCdundUBkXf3s7VXl0pqIKDSC/KGc2j8n1DBLKLZAHqkYlG+aWW+G5hGLvoNeUjlI42FtJLpwGUYbFlhy0QXLQv1Z+P7iUOyJrhujmFWX1FdJ5ZBefA5aceGiOlN119NPAX3JOuUAf45HkWG52NcdaHOzWu8rTnghSeLPo9QK0t6l/2gSFvGtOfZolnAHNZAeGEmcqAkhPmUoFtRAW+Zh6TNQY68FrSUI/XYc87Ky0ndaug1Kf7Ogbf8zLK+tJ4LdTCn9A+wcWxEpdkX45f1r/8jTIUK/s1PqBirXFuruq5/XhkhFmdq/I0qBAJ0uxBnk+29GaEQVMtYTzB+eJWTgrQzKhN6Nww2XEPEOl27yH+K0F+sj8QpZ0jkPETadP0gpwKMKv3zlA6xyndIYWrpw==";
        String fromBuzzvilDecrypted = "{\"point\": 1, \"user_id\": \"buzzvil_test\", \"transaction_id\": \"100004_100000000\", \"event_at\": 1588936508, \"campaign_name\": \"버즈빌 테스트 campaign_name\", \"extra\": \"{}\", \"action_type\": \"l\", \"base_point\": 1, \"campaign_id\": 202010160022, \"is_media\": 1, \"unit_id\": 452613281179508, \"revenue_type\": \"cpm\"}";
        String decrypted = decrypt(fromBuzzvilEncrypted, aesKey, aesIV);
        System.out.println("----decrypted-----\n"+decrypted);
        System.out.println("buzzvil decryption compatible? "+fromBuzzvilDecrypted.equals(decrypted));
    }
    static String encrypt(String message, String key, String iv) {
        try {
            // 1. encode in utf-8
            byte[] messageBytes = message.getBytes(StandardCharsets.UTF_8);
            // 2. encrypt message through AES CBC with PKCS7
            byte[] encrypted = aes(messageBytes, key, iv, Cipher.ENCRYPT_MODE);
            // 3. encode in base64
            return Base64.getEncoder().encodeToString(encrypted);
        } catch (Exception e) {
            System.out.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
    static String decrypt(String message, String key, String iv) {
        try {
            // 1. decode base64 message
            byte[] base64DecodedBytes = Base64.getDecoder().decode(message);
            // 2. decrypt message through AES CBC with PKCS7
            byte[] decrypted = aes(base64DecodedBytes, key, iv, Cipher.DECRYPT_MODE);
            // 3. decode in utf-8
            return new String(decrypted, StandardCharsets.UTF_8);
        } catch (Exception e) {
            System.out.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
    static byte[] aes(byte[] messageBytes, String key, String iv, int cipherMode) {
        try {
            byte[] keyBytes = key.getBytes(StandardCharsets.UTF_8);
            byte[] ivBytes = iv.getBytes(StandardCharsets.UTF_8);
            SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
            IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(cipherMode, keySpec, ivSpec);
            return cipher.doFinal(messageBytes);
        } catch (Exception e) {
            System.out.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
}

<?php
function encrypt($str, $mode, $key, $iv) {
    $encrypted = openssl_encrypt($str, $mode, $key, OPENSSL_RAW_DATA, $iv);
    return base64_encode($encrypted);
}
function decrypt($str, $mode, $key, $iv) {
    $text = base64_decode($str);
    return openssl_decrypt($text, $mode, $key, OPENSSL_RAW_DATA, $iv);
}
$mode = "AES-256-CBC";
$key = "BuzzvilAESKeyTest123456789101112";
$iv = "0000000000000000";
$plaintext = '{"success": 1, "reason": "중복 적립 요청"}';
$encrypted = encrypt($plaintext, $mode, $key, $iv);
print ("ENCRYPTED: ".$encrypted."\n");
// +VEmHrt+jwI6Dg2zImdGtI+iIQEqV8v5btpS1a3cdEQBzIc72V9aKju5m6+ELTBixbITMBoHIYjj8jJbsKbIgg==
$fromBuzzvil = "IGCdundUBkXf3s7VXl0pqIKDSC/KGc2j8n1DBLKLZAHqkYlG+aWW+G5hGLvoNeUjlI42FtJLpwGUYbFlhy0QXLQv1Z+P7iUOyJrhujmFWX1FdJ5ZBefA5aceGiOlN119NPAX3JOuUAf45HkWG52NcdaHOzWu8rTnghSeLPo9QK0t6l/2gSFvGtOfZolnAHNZAeGEmcqAkhPmUoFtRAW+Zh6TNQY68FrSUI/XYc87Ky0ndaug1Kf7Ogbf8zLK+tJ4LdTCn9A+wcWxEpdkX45f1r/8jTIUK/s1PqBirXFuruq5/XhkhFmdq/I0qBAJ0uxBnk+29GaEQVMtYTzB+eJWTgrQzKhN6Nww2XEPEOl27yH+K0F+sj8QpZ0jkPETadP0gpwKMKv3zlA6xyndIYWrpw==";
$decrypted = decrypt($fromBuzzvil, $mode, $key, $iv);
print("DECRYPTED: ".$decrypted);
/*
{"point": 1, "user_id": "buzzvil_test", "transaction_id": "100004_100000000", "event_at": 1588936508, "campaign_name": "버즈빌 테스트 campaign_name", "extra": "{}", "action_type": "l", "base_point": 1, "campaign_id": 202010160022, "is_media": 1, "unit_id": 452613281179508, "revenue_type": "cpm"}
*/
?>

# -*- coding:utf-8 -*-
import base64
# https://pypi.python.org/pypi/pycryptodome/3.9.9
from Crypto.Cipher import AES
# https://pypi.python.org/pypi/pkcs7/0.1.2
from pkcs7 import PKCS7Encoder
def encrypt(message, key, iv):
	message_plaintext_padded = PKCS7Encoder().encode(message)
	cipher = AES.new(key, AES.MODE_CBC, iv)
	message_encrypted_raw = cipher.encrypt(message_plaintext_padded)
	return base64.b64encode(message_encrypted_raw)
def decrypt(message, key, iv):
	message_decoded = base64.b64decode(message)
	cipher = AES.new(key, AES.MODE_CBC, iv)
	messaged_decrypted_padded = cipher.decrypt(message_decoded)
	message_plaintext_decoded = PKCS7Encoder().decode(messaged_decrypted_padded)	
	return message_plaintext_decoded
iv = '0000000000000000'
key = 'BuzzvilAESKeyTest123456789101112'
plaintext = '{"success": 1, "reason": "중복 적립 요청"}'
encrypted = encrypt(plaintext, key, iv)
print "ENCRYPTED: {}".format(encrypted)
# +VEmHrt+jwI6Dg2zImdGtI+iIQEqV8v5btpS1a3cdEQBzIc72V9aKju5m6+ELTBixbITMBoHIYjj8jJbsKbIgg==
from_buzzvil = "IGCdundUBkXf3s7VXl0pqIKDSC/KGc2j8n1DBLKLZAHqkYlG+aWW+G5hGLvoNeUjlI42FtJLpwGUYbFlhy0QXLQv1Z+P7iUOyJrhujmFWX1FdJ5ZBefA5aceGiOlN119NPAX3JOuUAf45HkWG52NcdaHOzWu8rTnghSeLPo9QK0t6l/2gSFvGtOfZolnAHNZAeGEmcqAkhPmUoFtRAW+Zh6TNQY68FrSUI/XYc87Ky0ndaug1Kf7Ogbf8zLK+tJ4LdTCn9A+wcWxEpdkX45f1r/8jTIUK/s1PqBirXFuruq5/XhkhFmdq/I0qBAJ0uxBnk+29GaEQVMtYTzB+eJWTgrQzKhN6Nww2XEPEOl27yH+K0F+sj8QpZ0jkPETadP0gpwKMKv3zlA6xyndIYWrpw=="
decrypted = decrypt(from_buzzvil, key, iv)
print "DECRYPTED: {}".format(decrypted)
#{"point": 1, "user_id": "buzzvil_test", "transaction_id": "100004_100000000", "event_at": 1588936508, "campaign_name": "버즈빌 테스트 campaign_name", "extra": "{}", "action_type": "l", "base_point": 1, "campaign_id": 202010160022, "is_media": 1, "unit_id": 452613281179508, "revenue_type": "cpm"}

# -*- coding:utf-8 -*-
import base64
# https://pypi.python.org/pypi/pycryptodome/3.9.9
from Crypto.Cipher import AES
from binascii import unhexlify
BLOCK_SIZE = 16
def encrypt(message, key, iv):
	message_plaintext_padded = pad(message).encode('utf-8')
	cipher = AES.new(key, AES.MODE_CBC, iv)
	message_encrypted_raw = cipher.encrypt(message_plaintext_padded)
	return base64.b64encode(message_encrypted_raw)
def decrypt(message, key, iv):
	message_decoded = base64.b64decode(message)
	cipher = AES.new(key, AES.MODE_CBC, iv)
	messaged_decrypted_padded = unpad(cipher.decrypt(message_decoded))
	return messaged_decrypted_padded.decode('utf-8')
def pad(s):
	return s + (BLOCK_SIZE - len(s.encode('utf-8')) % BLOCK_SIZE) * chr(BLOCK_SIZE - len(s.encode('utf-8')) % BLOCK_SIZE)
def unpad(s):
	return s[:-ord(s[len(s)-1:])]
iv = '0000000000000000'.encode('utf-8')
key = 'BuzzvilAESKeyTest123456789101112'.encode('utf-8')
plaintext = '{"success": 1, "reason": "중복 적립 요청"}'
encrypted = encrypt(plaintext, key, iv)
print ("ENCRYPTED: {}".format(encrypted))
# +VEmHrt+jwI6Dg2zImdGtI+iIQEqV8v5btpS1a3cdEQBzIc72V9aKju5m6+ELTBixbITMBoHIYjj8jJbsKbIgg==
from_buzzvil = "IGCdundUBkXf3s7VXl0pqIKDSC/KGc2j8n1DBLKLZAHqkYlG+aWW+G5hGLvoNeUjlI42FtJLpwGUYbFlhy0QXLQv1Z+P7iUOyJrhujmFWX1FdJ5ZBefA5aceGiOlN119NPAX3JOuUAf45HkWG52NcdaHOzWu8rTnghSeLPo9QK0t6l/2gSFvGtOfZolnAHNZAeGEmcqAkhPmUoFtRAW+Zh6TNQY68FrSUI/XYc87Ky0ndaug1Kf7Ogbf8zLK+tJ4LdTCn9A+wcWxEpdkX45f1r/8jTIUK/s1PqBirXFuruq5/XhkhFmdq/I0qBAJ0uxBnk+29GaEQVMtYTzB+eJWTgrQzKhN6Nww2XEPEOl27yH+K0F+sj8QpZ0jkPETadP0gpwKMKv3zlA6xyndIYWrpw=="
decrypted = decrypt(from_buzzvil, key, iv)
print ("DECRYPTED: {}".format(decrypted))
#{"point": 1, "user_id": "buzzvil_test", "transaction_id": "100004_100000000", "event_at": 1588936508, "campaign_name": "버즈빌 테스트 campaign_name", "extra": "{}", "action_type": "l", "base_point": 1, "campaign_id": 202010160022, "is_media": 1, "unit_id": 452613281179508, "revenue_type": "cpm"}