AES-256-ECB PKCS7Padding 解密 微信退款接口

微信退款通知

https://pay.weixin.qq.com/wiki/doc/api/wxpay/ch/pay/OfficialPayMent/chapter8_8.shtml

需要的pom

<!-- https://mvnrepository.com/artifact/commons-codec/commons-codec -->
		<dependency>
		    <groupId>commons-codec</groupId>
		    <artifactId>commons-codec</artifactId>
		    <version>1.11</version><!--$NO-MVN-MAN-VER$-->
		</dependency>
		
	<!-- https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk15on -->
		<dependency>
		    <groupId>org.bouncycastle</groupId>
		    <artifactId>bcprov-jdk15on</artifactId>
		    <version>1.60</version>
		</dependency>

1 Base64解密

import org.apache.commons.codec.binary.Base64;
public class BASE64Util {
	 /**
	  * 进行Base64解密 
	  * @param binaryData
	  * @return
	  * @throws Exception
	  */
    public static byte[] decodeBase64(String binaryData) throws Exception {  
    	  byte[] result = Base64.decodeBase64(binaryData.getBytes());  
        return  result;  
    }  
    /**
     * 进行Base64加密
     * @param binaryData
     * @return
     * @throws Exception
     */
    public static byte[] encodeBase64(byte[] binaryData) throws Exception {  
  	  byte[] result = Base64.encodeBase64(binaryData);
      return  result;  
  }  
}

2，MD5加密

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {

	 public static String MD532(String plainText) {  
	        try {  
	            MessageDigest md = MessageDigest.getInstance("MD5");  
	            md.update(plainText.getBytes());  
	            byte b[] = md.digest();  
	            int i;  
	            StringBuffer buf = new StringBuffer("");  
	            for (int offset = 0; offset < b.length; offset++) {  
	                i = b[offset];  
	                if (i < 0)  
	                    i += 256;  
	                if (i < 16)  
	                    buf.append("0");  
	                buf.append(Integer.toHexString(i));  
	            }  
	            //32位加密  
	            return buf.toString();  
	            // 16位的加密  
	            //return buf.toString().substring(8, 24);  
	        } catch (NoSuchAlgorithmException e) {  
	            e.printStackTrace();  
	            return null;  
	        }  
	    }  
	 /**
	  * 大写MD5
	  * @param plainText
	  * @return
	  */
	 public static String dxMD532(String plainText) {
		return MD5Util.MD532(plainText).toUpperCase();  
		 
	 }
	 
		public static void main(String[] args) {
			// TODO Auto-generated method stub
			System.out.println("111");
			System.out.println(MD5Util.MD532("1212"));
			System.out.println(MD5Util.dxMD532("1212"));
			
		}
}

3，对req_info 做AES-256-ECB解密（PKCS7Padding）

import java.security.Security;
import java.util.Map;

import javax.crypto.Cipher;  
import javax.crypto.spec.SecretKeySpec;  
  
import org.bouncycastle.jce.provider.BouncyCastleProvider;  
 
 
public class AESUtil {
	
	/**
	 * 密钥算法
	 */
	private static final String ALGORITHM = "AES";
	/**
	 * 加解密算法/工作模式/填充方式
	 */
	private static final String ALGORITHM_MODE_PADDING = "AES/ECB/PKCS7Padding";
	
	static {
		//Security.addProvider(new BouncyCastleProvider());
		Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
	}
	
	/**
	 * AES加密
	 * 
	 * @param data
	 * @return
	 * @throws Exception
	 */
	public static String encryptData(String data,String key) throws Exception {
		// 创建密码器
		Cipher cipher = Cipher.getInstance(ALGORITHM_MODE_PADDING, "BC");
		SecretKeySpec secretKeySpec = new SecretKeySpec(MD5Util.MD532(key).getBytes(), ALGORITHM);
		// 初始化
		cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
		return new String(BASE64Util.encodeBase64(cipher.doFinal(data.getBytes())));
	}
 
	/**
	 * AES解密
	 * 
	 * @param base64Data
	 * @return
	 * @throws Exception
	 */
	public static String decryptData(String base64Data,String key) throws Exception {
		Cipher cipher = Cipher.getInstance(ALGORITHM_MODE_PADDING, "BC");
		SecretKeySpec secretKeySpec = new SecretKeySpec(MD5Util.MD532(key).getBytes(), ALGORITHM);
		cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
		return new String(cipher.doFinal(BASE64Util.decodeBase64(base64Data)));
	}
 
	public static void main(String[] args) throws Exception {
		
		String A="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";
		A=AESUtil.decryptData(A,"3c6e0b8a9c15224a8228b9a98ca1531d");
		System.out.println(A);

	}
 
}