在做通讯录同步的过程中遇到的2个问题

1)配置回调服务时,只配置了get请求,回调地址可以配置成功,但是当用户触发回调行为,微信会发送post请求,服务器会接受不到信息(必须配置GET/POST)。

2)假设企业的接收消息的URL设置为http://xxx.xxx.com。
企业管理员在保存回调配置信息时,企业微信会发送一条验证消息到填写的URL(GET请求),带着4个参数[msg_signature,timestamp,nonce,echostr],通过这四个参数进行验签。

企业微信回调解密java 企业微信回调url_微信

 当我们触发了回调行为(POST请求),比如说,修改部门名称。企业微信会发送请求,带着3个参数[msg_signature,timestamp,nonce],跟GET请求不一样,没有echostr参数,它验签的是加密的消息体【Encrpyt】,在接受数据格式中。

msg_signature

String

企业微信加密签名,msg_signature结合了企业填写的token、请求中的timestamp、nonce参数、加密的消息体

timestamp

Integer

时间戳。与nonce结合使用,用于防止请求重放攻击。

nonce

企业微信回调解密java 企业微信回调url_微信_02

企业微信回调解密java 企业微信回调url_微信_03

所以说我们需要将流中xml信息拿到。 

 

代码如下

util

/**
 * 微信官方util
 */
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) {
			System.out.println(encodingAesKey+" "+encodingAesKey.length());
			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;
	}
	/**验签*/
	public boolean verifySign(String msgSignature, String timeStamp, String nonce, String echoStr) {
		String signature;
		try {
			signature = SHA1.getSHA1(token, timeStamp, nonce, echoStr);
			if (!signature.equals(msgSignature)) {
				return false;
			}
		} catch (AesException e) {
			e.printStackTrace();
			return false;
		}
		System.out.println("成功。。");
		return true;
	}
	/**解密*/
	public String decryptQyweixin(String echoStr) {
		try {
			String text =decrypt(echoStr);
			return text;
		} catch (AesException e) {
			e.printStackTrace();
			return null;
		}
	}
}

回调地址(xml转map使用的 是dom4j jar包)

/**
addressToken
encodingAESKey
corpid
是回调地址填写的信息,corpid企业微信ID
*/
@RequestMapping(value = "receive")
	@ResponseBody
	public String receive(HttpServletRequest request)  {
		boolean isGet = request.getMethod().toLowerCase().equals("get");
		WXBizMsgCrypt wxcpt;
		try {
			wxcpt = new WXBizMsgCrypt(addressToken,encodingAESKey, corpid);
		} catch (AesException e2) {
			e2.printStackTrace();
			return "fail";
		}
		if (isGet) {
			String result = null;
			try {
				String msg_signature = request.getParameter("msg_signature");// 微信加密签名  
				String timestamp = request.getParameter("timestamp");// 时间戳  
				String nonce = request.getParameter("nonce");// 随机数  
				String echostr = request.getParameter("echostr");//加密内容
				result = wxcpt.VerifyURL(msg_signature, timestamp, nonce, echostr);
				if (result == null) {
					return "fail";
				}
				System.out.println(result);
			} catch (AesException e1) {
				e1.printStackTrace();
			}
			return result;
		}else{
			try {
				String msg_signature = request.getParameter("msg_signature");// 微信加密签名  
				String timestamp = request.getParameter("timestamp");// 时间戳  
				String nonce = request.getParameter("nonce");// 随机数  
				String postData = readFromStream(request.getInputStream());

				Map<String, String> params = XmlUtils.toMap(postData);
				String encrypt = params.get("Encrypt");//消息结构体加密后的字符串
				if(!wxcpt.verifySign(msg_signature, timestamp, nonce, encrypt)){
					System.out.println("校验错误");
					return "fail";
				}
				String text = wxcpt.decryptQyweixin(encrypt);
				if(text==null){
					return "fail";
				}
				Map<String, String> maps = toMap(text);

				return "fail";
			} catch (IOException e) {
				e.printStackTrace();
				return "fail";
			}
		}
	}
	/** 读取流 */
	private String readFromStream(InputStream inputStream){
		if(inputStream == null){
			return null;
		}
		try {
			BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
			StringBuffer buffer = new StringBuffer();
			String line;
			while (null != (line = reader.readLine())) {
				buffer.append(line).append("\n");
			}
			return buffer.toString();
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		} finally{
			try {
				inputStream.close();
			} catch (IOException e) {
			}
		}
	}
	 /** XML转Map */
    public static Map<String, String> toMap(String xml){
        Map<String, String> rest = new HashMap<String, String>();
        SAXReader reader = new SAXReader(false);
        Document doc;
		try {
			doc = reader.read(new ByteArrayInputStream(xml.getBytes("UTF-8")));
			@SuppressWarnings("unchecked")
			List<Element> els = doc.getRootElement().elements();
	        for(Element el : els){
	            rest.put(el.getName(), el.getTextTrim());
	        }
		} catch (DocumentException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
        return rest;
    }