企业微信开启接收消息+验证URL有效性

https://developer.work.weixin.qq.com/document/10514

http://api.3dept.com/?msg_signature=ASDFQWEXZCVAQFASDFASDFSS&timestamp=13500001234&nonce=123412323&echostr=ENCRYPT_STR

package com.ruoyi.project.controller;
import com.ruoyi.project.tx.qyweixin.service.IQYWeiXinLoginService;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;
@RestController

@RequestMapping("/wechat/info")

public class QYWechatInfoController {
@Resource
private IQYWeiXinLoginService qyWeiXinLoginService;

/**
 * 验证URL有效性
 *
 */
@RequestMapping(value = "/verifyURLValidity", method = RequestMethod.GET)
public void verifyURLValidity(@RequestParam(value = "msg_signature", required = true) String msgSignature,
                              @RequestParam(value = "timestamp", required = true) String timestamp,
                              @RequestParam(value = "nonce", required = true) String nonce,
                              @RequestParam(value = "echostr", required = true) String echostr,
                              HttpServletResponse response) {
    String msg = qyWeiXinLoginService.verifyURLValidity(msgSignature, timestamp, nonce, echostr);
    try {
        response.getWriter().print(msg);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

}

package com.ruoyi.project.tx.qyweixin.service;

public interface IQYWeiXinLoginService {

String verifyURLValidity(String msgSignature, String timestamp, String nonce, String echostr);

}

package com.ruoyi.project.tx.qyweixin.service.impl;

import com.ruoyi.project.tx.qyweixin.service.IQYWeiXinLoginService;

import com.ruoyi.project.utils.aes.AesException;

import com.ruoyi.project.utils.aes.WXBizMsgCrypt;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.stereotype.Service;
@Service

public class QYWeiXinLoginServiceImpl implements IQYWeiXinLoginService {

private static final Logger logger = LoggerFactory.getLogger(QYWeiXinLoginServiceImpl.class);
@Override
public String  verifyURLValidity(String msgSignature, String timestamp, String nonce, String echostr) {
    logger.info("企业微信登录获取到的参数：msgSignature:{},timestamp:{},nonce:{},echostr:{}:",msgSignature,timestamp,nonce,echostr);
    //token
    String TOKEN = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
    // encodingAESKey
    String ENCODINGAES_KEY = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
    //企业ID
    String CORP_ID = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";

    // 通过检验msg_signature对请求进行校验，若校验成功则原样返回echostr，表示接入成功，否则接入失败
    String result = null;
    try {
        WXBizMsgCrypt wxcpt = new WXBizMsgCrypt(TOKEN, ENCODINGAES_KEY, CORP_ID);
        result = wxcpt.VerifyURL(msgSignature, timestamp, nonce, echostr);
    } catch (AesException e) {
        e.printStackTrace();
    }
    logger.info("----------微信接口访问结束----------");
    return result;
}

}

/**


对企业微信发送给企业后台的消息加解密示例代码.

@copyright Copyright (c) 1998-2014 Tencent Inc.

*/

// ------------------------------------------------------------------------
/**

针对org.apache.commons.codec.binary.Base64，
需要导入架包commons-codec-1.9（或commons-codec-1.8等其他版本）
官方下载地址：http://commons.apache.org/proper/commons-codec/download_codec.cgi

*/

package com.ruoyi.project.utils.aes;

import java.nio.charset.Charset;

import java.util.Arrays;

import java.util.Random;
import javax.crypto.Cipher;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
/**


提供接收和推送给企业微信消息的加解密接口(UTF8编码的字符串).


<ol>


<li>第三方回复加密消息给企业微信</li>


<li>第三方收到企业微信发送的消息，验证消息的安全性，并对消息进行解密。</li>


</ol>


说明：异常java.security.InvalidKeyException:illegal Key Size的解决方案


<ol>


<li>在官方网站下载JCE无限制权限策略文件（JDK7的下载地址：


 http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html&lt;/li&gt;



<li>下载后解压，可以看到local_policy.jar和US_export_policy.jar以及readme.txt</li>


<li>如果安装了JRE，将两个jar文件放到%JRE_HOME%\lib\security目录下覆盖原来的文件</li>


<li>如果安装了JDK，将两个jar文件放到%JDK_HOME%\jre\lib\security目录下覆盖原来文件</li>


</ol>

*/

public class WXBizMsgCrypt {

static Charset CHARSET = Charset.forName("utf-8");

Base64 base64 = new Base64();

byte[] aesKey;

String token;

String receiveid;
/**


构造函数


@param token 企业微信后台，开发者设置的token


@param encodingAesKey 企业微信后台，开发者设置的EncodingAESKey


@param receiveid, 不同场景含义不同，详见文档



@throws AesException 执行失败，请查看该异常的错误码和具体的错误信息

*/

public WXBizMsgCrypt(String token, String encodingAesKey, String receiveid) throws AesException {

if (encodingAesKey.length() != 43) {

throw new AesException(AesException.IllegalAesKey);

}
this.token = token;

this.receiveid = receiveid;

aesKey = Base64.decodeBase64(encodingAesKey + "=");

}


// 生成4个字节的网络字节序

byte[] getNetworkBytesOrder(int sourceNumber) {

byte[] orderBytes = new byte[4];

orderBytes[3] = (byte) (sourceNumber & 0xFF);

orderBytes[2] = (byte) (sourceNumber >> 8 & 0xFF);

orderBytes[1] = (byte) (sourceNumber >> 16 & 0xFF);

orderBytes[0] = (byte) (sourceNumber >> 24 & 0xFF);

return orderBytes;

}
// 还原4个字节的网络字节序

int recoverNetworkBytesOrder(byte[] orderBytes) {

int sourceNumber = 0;

for (int i = 0; i < 4; i++) {

sourceNumber <<= 8;

sourceNumber |= orderBytes[i] & 0xff;

}

return sourceNumber;

}
// 随机生成16位字符串

String getRandomStr() {

String base = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

Random random = new Random();

StringBuffer sb = new StringBuffer();

for (int i = 0; i < 16; i++) {

int number = random.nextInt(base.length());

sb.append(base.charAt(number));

}

return sb.toString();

}
/**


对明文进行加密.



@param text 需要加密的明文


@return 加密后base64编码的字符串


@throws AesException aes加密失败

*/

String encrypt(String randomStr, String text) throws AesException {

ByteGroup byteCollector = new ByteGroup();

byte[] randomStrBytes = randomStr.getBytes(CHARSET);

byte[] textBytes = text.getBytes(CHARSET);

byte[] networkBytesOrder = getNetworkBytesOrder(textBytes.length);

byte[] receiveidBytes = receiveid.getBytes(CHARSET);
// randomStr + networkBytesOrder + text + receiveid

byteCollector.addBytes(randomStrBytes);

byteCollector.addBytes(networkBytesOrder);

byteCollector.addBytes(textBytes);

byteCollector.addBytes(receiveidBytes);
// ... + pad: 使用自定义的填充方式对明文进行补位填充

byte[] padBytes = PKCS7Encoder.encode(byteCollector.size());

byteCollector.addBytes(padBytes);
// 获得最终的字节流, 未加密

byte[] unencrypted = byteCollector.toBytes();
try {

// 设置加密模式为AES的CBC模式

Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");

SecretKeySpec keySpec = new SecretKeySpec(aesKey, "AES");

IvParameterSpec iv = new IvParameterSpec(aesKey, 0, 16);

cipher.init(Cipher.ENCRYPT_MODE, keySpec, iv);
 // 加密
 byte[] encrypted = cipher.doFinal(unencrypted);

 // 使用BASE64对加密后的字符串进行编码
 String base64Encrypted = base64.encodeToString(encrypted);

 return base64Encrypted;

} catch (Exception e) {

e.printStackTrace();

throw new AesException(AesException.EncryptAESError);

}

}


/**


对密文进行解密.



@param text 需要解密的密文


@return 解密得到的明文


@throws AesException aes解密失败

*/

String decrypt(String text) throws AesException {

byte[] original;

try {

// 设置解密模式为AES的CBC模式

Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");

SecretKeySpec key_spec = new SecretKeySpec(aesKey, "AES");

IvParameterSpec iv = new IvParameterSpec(Arrays.copyOfRange(aesKey, 0, 16));

cipher.init(Cipher.DECRYPT_MODE, key_spec, iv);
 // 使用BASE64对密文进行解码
 byte[] encrypted = Base64.decodeBase64(text);

 // 解密
 original = cipher.doFinal(encrypted);

} catch (Exception e) {

e.printStackTrace();

throw new AesException(AesException.DecryptAESError);

}
String xmlContent, from_receiveid;

try {

// 去除补位字符

byte[] bytes = PKCS7Encoder.decode(original);
 // 分离16位随机字符串,网络字节序和receiveid
 byte[] networkOrder = Arrays.copyOfRange(bytes, 16, 20);

 int xmlLength = recoverNetworkBytesOrder(networkOrder);

 xmlContent = new String(Arrays.copyOfRange(bytes, 20, 20 + xmlLength), CHARSET);
 from_receiveid = new String(Arrays.copyOfRange(bytes, 20 + xmlLength, bytes.length),
         CHARSET);

} catch (Exception e) {

e.printStackTrace();

throw new AesException(AesException.IllegalBuffer);

}
// receiveid不相同的情况

if (!from_receiveid.equals(receiveid)) {

throw new AesException(AesException.ValidateCorpidError);

}

return xmlContent;


}
/**


将企业微信回复用户的消息加密打包.


<ol>


<li>对要发送的消息进行AES-CBC加密</li>


<li>生成安全签名</li>


<li>将消息密文和安全签名打包成xml格式</li>


</ol>



@param replyMsg 企业微信待回复用户的消息，xml格式的字符串


@param timeStamp 时间戳，可以自己生成，也可以用URL参数的timestamp


@param nonce 随机串，可以自己生成，也可以用URL参数的nonce



@return 加密后的可以直接回复用户的密文，包括msg_signature, timestamp, nonce, encrypt的xml格式的字符串


@throws AesException 执行失败，请查看该异常的错误码和具体的错误信息

*/

public String EncryptMsg(String replyMsg, String timeStamp, String nonce) throws AesException {

// 加密

String encrypt = encrypt(getRandomStr(), replyMsg);
// 生成安全签名

if (timeStamp == "") {

timeStamp = Long.toString(System.currentTimeMillis());

}
String signature = SHA1.getSHA1(token, timeStamp, nonce, encrypt);
// System.out.println("发送给平台的签名是: " + signature[1].toString());

// 生成发送的xml

String result = XMLParse.generate(encrypt, signature, timeStamp, nonce);

return result;

}


/**


检验消息的真实性，并且获取解密后的明文.


<ol>


<li>利用收到的密文生成安全签名，进行签名验证</li>


<li>若验证通过，则提取xml中的加密消息</li>


<li>对消息进行解密</li>


</ol>



@param msgSignature 签名串，对应URL参数的msg_signature


@param timeStamp 时间戳，对应URL参数的timestamp


@param nonce 随机串，对应URL参数的nonce


@param postData 密文，对应POST请求的数据



@return 解密后的原文


@throws AesException 执行失败，请查看该异常的错误码和具体的错误信息

*/

public String DecryptMsg(String msgSignature, String timeStamp, String nonce, String postData)

throws AesException {
// 密钥，公众账号的app secret

// 提取密文

Object[] encrypt = XMLParse.extract(postData);
// 验证安全签名

String signature = SHA1.getSHA1(token, timeStamp, nonce, encrypt[1].toString());
// 和URL中的签名比较是否相等

// System.out.println("第三方收到URL中的签名：" + msg_sign);

// System.out.println("第三方校验签名：" + signature);

if (!signature.equals(msgSignature)) {

throw new AesException(AesException.ValidateSignatureError);

}
// 解密

String result = decrypt(encrypt[1].toString());

return result;

}


/**


验证URL


@param msgSignature 签名串，对应URL参数的msg_signature


@param timeStamp 时间戳，对应URL参数的timestamp


@param nonce 随机串，对应URL参数的nonce


@param echoStr 随机串，对应URL参数的echostr



@return 解密之后的echostr


@throws AesException 执行失败，请查看该异常的错误码和具体的错误信息

*/

public String VerifyURL(String msgSignature, String timeStamp, String nonce, String echoStr)

throws AesException {

String signature = SHA1.getSHA1(token, timeStamp, nonce, echoStr);
if (!signature.equals(msgSignature)) {

throw new AesException(AesException.ValidateSignatureError);

}
String result = decrypt(echoStr);

return result;

}




}

package com.ruoyi.project.utils.aes;

/**


加解密异常类

*/

public class AesException extends Exception {

public final static int OK = 0;

public final static int ValidateSignatureError = -40001;

public final static int ParseXmlError = -40002;

public final static int ComputeSignatureError = -40003;

public final static int IllegalAesKey = -40004;

public final static int ValidateCorpidError = -40005;

public final static int EncryptAESError = -40006;

public final static int DecryptAESError = -40007;

public final static int IllegalBuffer = -40008;

//public final static int EncodeBase64Error = -40009;

//public final static int DecodeBase64Error = -40010;

//public final static int GenReturnXmlError = -40011;

private int code;
private static String getMessage(int code) {

switch (code) {

case ValidateSignatureError:

return "签名验证错误";

case ParseXmlError:

return "xml解析失败";

case ComputeSignatureError:

return "sha加密生成签名失败";

case IllegalAesKey:

return "SymmetricKey非法";

case ValidateCorpidError:

return "corpid校验失败";

case EncryptAESError:

return "aes加密失败";

case DecryptAESError:

return "aes解密失败";

case IllegalBuffer:

return "解密后得到的buffer非法";

//      case EncodeBase64Error:

//          return "base64加密错误";

//      case DecodeBase64Error:

//          return "base64解密错误";

//      case GenReturnXmlError:

//          return "xml生成失败";

default:

return null; // cannot be

}

}

public int getCode() {

return code;

}

AesException(int code) {

super(getMessage(code));

this.code = code;

}

}

package com.ruoyi.project.utils.aes;



import java.util.ArrayList;
class ByteGroup {

ArrayList<Byte> byteContainer = new ArrayList<Byte>();
public byte[] toBytes() {
    byte[] bytes = new byte[byteContainer.size()];
    for (int i = 0; i &lt; byteContainer.size(); i++) {
        bytes[i] = byteContainer.get(i);
    }
    return bytes;
}

public ByteGroup addBytes(byte[] bytes) {
    for (byte b : bytes) {
        byteContainer.add(b);
    }
    return this;
}

public int size() {
    return byteContainer.size();
}

}

package com.ruoyi.project.utils.aes;

import java.nio.charset.Charset;

import java.util.Arrays;
/**


提供基于PKCS7算法的加解密接口.

*/

class PKCS7Encoder {

static Charset CHARSET = Charset.forName("utf-8");

static int BLOCK_SIZE = 32;
/**

获得对明文进行补位填充的字节.

@param count 需要进行填充补位操作的明文字节个数
@return 补齐用的字节数组

*/

static byte[] encode(int count) {

// 计算需要填充的位数

int amountToPad = BLOCK_SIZE - (count % BLOCK_SIZE);

if (amountToPad == 0) {

amountToPad = BLOCK_SIZE;

}

// 获得补位所用的字符

char padChr = chr(amountToPad);

String tmp = new String();

for (int index = 0; index < amountToPad; index++) {

tmp += padChr;

}

return tmp.getBytes(CHARSET);

}

/**

删除解密后明文的补位字符

@param decrypted 解密后的明文
@return 删除补位字符后的明文

*/

static byte[] decode(byte[] decrypted) {

int pad = (int) decrypted[decrypted.length - 1];

if (pad < 1 || pad > 32) {

pad = 0;

}

return Arrays.copyOfRange(decrypted, 0, decrypted.length - pad);

}

/**

将数字转化成ASCII码对应的字符，用于对明文进行补码

@param a 需要转化的数字
@return 转化得到的字符

*/

static char chr(int a) {

byte target = (byte) (a & 0xFF);

return (char) target;

}



}

package com.ruoyi.project.utils.aes;

import java.security.MessageDigest;

import java.util.Arrays;

/**


对企业微信发送给企业后台的消息加解密示例代码.



@copyright Copyright (c) 1998-2014 Tencent Inc.

/

/*


SHA1 class



计算消息签名接口.

*/

public class SHA1 {
/**


用SHA1算法生成安全签名


@param token 票据


@param timestamp 时间戳


@param nonce 随机字符串


@param encrypt 密文


@return 安全签名


@throws AesException

*/

public static String getSHA1(String token, String timestamp, String nonce, String encrypt) throws AesException

{

try {

String[] array = new String[] { token, timestamp, nonce, encrypt };

StringBuffer sb = new StringBuffer();

// 字符串排序

Arrays.sort(array);

for (int i = 0; i < 4; i++) {

sb.append(array[i]);

}

String str = sb.toString();

// SHA1签名生成

MessageDigest md = MessageDigest.getInstance("SHA-1");

md.update(str.getBytes());

byte[] digest = md.digest();
 StringBuffer hexstr = new StringBuffer();
 String shaHex = &#34;&#34;;
 for (int i = 0; i &lt; digest.length; i++) {
     shaHex = Integer.toHexString(digest[i] &amp; 0xFF);
     if (shaHex.length() &lt; 2) {
         hexstr.append(0);
     }
     hexstr.append(shaHex);
 }
 return hexstr.toString();

} catch (Exception e) {

e.printStackTrace();

throw new AesException(AesException.ComputeSignatureError);

}

}

}

/**





对企业微信发送给企业后台的消息加解密示例代码.



@copyright Copyright (c) 1998-2014 Tencent Inc.

*/


// ------------------------------------------------------------------------
package com.ruoyi.project.utils.aes;
import java.io.StringReader;
import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.w3c.dom.NodeList;

import org.xml.sax.InputSource;
/**


XMLParse class



提供提取消息格式中的密文及生成回复消息格式的接口.

*/

class XMLParse {
/**


提取出xml数据包中的加密消息


@param xmltext 待提取的xml字符串


@return 提取出的加密消息字符串


@throws AesException

*/

public static Object[] extract(String xmltext) throws AesException     {

Object[] result = new Object[3];

try {

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
 String FEATURE = null;
 // This is the PRIMARY defense. If DTDs (doctypes) are disallowed, almost all XML entity attacks are prevented
 // Xerces 2 only - http://xerces.apache.org/xerces2-j/features.html#disallow-doctype-decl
 FEATURE = "http://apache.org/xml/features/disallow-doctype-decl";
 dbf.setFeature(FEATURE, true);

 // If you can't completely disable DTDs, then at least do the following:
 // Xerces 1 - http://xerces.apache.org/xerces-j/features.html#external-general-entities
 // Xerces 2 - http://xerces.apache.org/xerces2-j/features.html#external-general-entities
 // JDK7+ - http://xml.org/sax/features/external-general-entities
 FEATURE = "http://xml.org/sax/features/external-general-entities";
 dbf.setFeature(FEATURE, false);

 // Xerces 1 - http://xerces.apache.org/xerces-j/features.html#external-parameter-entities
 // Xerces 2 - http://xerces.apache.org/xerces2-j/features.html#external-parameter-entities
 // JDK7+ - http://xml.org/sax/features/external-parameter-entities
 FEATURE = "http://xml.org/sax/features/external-parameter-entities";
 dbf.setFeature(FEATURE, false);

 // Disable external DTDs as well
 FEATURE = "http://apache.org/xml/features/nonvalidating/load-external-dtd";
 dbf.setFeature(FEATURE, false);

 // and these as well, per Timothy Morgan's 2014 paper: "XML Schema, DTD, and Entity Attacks"
 dbf.setXIncludeAware(false);
 dbf.setExpandEntityReferences(false);

 // And, per Timothy Morgan: "If for some reason support for inline DOCTYPEs are a requirement, then
 // ensure the entity settings are disabled (as shown above) and beware that SSRF attacks
 // (http://cwe.mitre.org/data/definitions/918.html) and denial
 // of service attacks (such as billion laughs or decompression bombs via "jar:") are a risk."

 // remaining parser logic
 DocumentBuilder db = dbf.newDocumentBuilder();
 StringReader sr = new StringReader(xmltext);
 InputSource is = new InputSource(sr);
 Document document = db.parse(is);

 Element root = document.getDocumentElement();
 NodeList nodelist1 = root.getElementsByTagName("Encrypt");
 result[0] = 0;
 result[1] = nodelist1.item(0).getTextContent();
 return result;

} catch (Exception e) {

e.printStackTrace();

throw new AesException(AesException.ParseXmlError);

}

}


/**


生成xml消息


@param encrypt 加密后的消息密文


@param signature 安全签名


@param timestamp 时间戳


@param nonce 随机字符串


@return 生成的xml字符串

*/

public static String generate(String encrypt, String signature, String timestamp, String nonce) {
String format = "<xml>\n" + "<Encrypt><![CDATA[%1$s]]></Encrypt>\n"

+ "<MsgSignature><![CDATA[%2$s]]></MsgSignature>\n"

+ "<TimeStamp>%3s&lt;/TimeStamp&gt;\n&#34; + &#34;&lt;Nonce&gt;&lt;![CDATA[%4s]]></Nonce>\n" + "</xml>";

return String.format(format, encrypt, signature, timestamp, nonce);


}

}