微信第三方授权流程:获取公众信息

时间：2021-02-09 05:46:17


1：获取component_verify_ticket

2：获取component_access_token

3：获取pre_auth_code

4：获取authorizer_access_token

5：获取公众信息


1：获取component_verify_ticket

很多人不知道怎样去获取component_verify_ticket，我也是，微信开发者资源中说道：微信服务器每隔10分钟会向第三方的消息接收地址推送一次component_verify_ticket，刚开始我不明白推送的意思，代码敲好了就去使劲刷页面，就是不能echo component_verify_ticket，网上各种找，但很多都是出自一篇博客，只是给出来了代码，没说明怎么获取component_verify_ticket，后来注意到了好多博客都有把component_verify_ticket存起来，而且联想到每隔10分钟会向第三方的消息接收地址推送一次component_verify_ticket，我也把component_verify_ticket保存起来，过10多分钟去看，保存文档里真的就有component_verify_ticket了，突然感觉自己好傻，这都想不到。所以component_verify_ticket不是马上就能echo 出来，要存起来。

<span style="font-size:18px;">include_once "wxstore/lib/wxBizMsgCrypt.php"; //这个微信官方有给出代码，把所有代码合并一下
$wxData = include_once "wxstore/lib/wxConfig.php";
// 第三方发送消息给公众平台
$encodingAesKey = $wxData['SecretKey'];
$token = $wxData['Token'];
$appId = $wxData['AppId'];
$appSecret = $wxData['AppSecret'];

$timeStamp = empty ( $_GET ['timestamp'] ) ? '' : trim ( $_GET ['timestamp'] );  
$nonce = empty ( $_GET ['nonce'] ) ? '' : trim ( $_GET ['nonce'] );  
$msg_sign = empty ( $_GET ['msg_signature'] ) ? "" : trim ( $_GET ['msg_signature'] );  
$encryptMsg = file_get_contents ( 'php://input' );  

$pc = new WXBizMsgCrypt ( $token, $encodingAesKey, $appId ); 

include_once "wxstore/lib/wxHelper.php";
$helper = new wxHelper();
// 第三方收到公众号平台发送的消息
$msg = '';
$errCode = $pc->decryptMsg ( $msg_sign, $timeStamp, $nonce, $encryptMsg, $msg );

if ($errCode == 0) {
	$data = $helper->xmlToArr ( $msg );
	$filedata['component_verify_ticket'] = $data['ComponentVerifyTicket'];
	if(!empty($$filedata['component_verify_ticket']))
	{
		$helper->set_php_file(dirname(__FILE__)."/wxstore/lib/static/component_verify_ticket.php", json_encode($filedata));
	}
	
	echo 'success';
} else {
	echo $errCode;
}</span>

 
<span style="font-size:18px;">wxBizMsgCrypt.php</span>
<span style="font-size:18px;">/**
 * error code 说明.
 * <ul>
 *    <li>-40001: 签名验证错误</li>
 *    <li>-40002: xml解析失败</li>
 *    <li>-40003: sha加密生成签名失败</li>
 *    <li>-40004: encodingAesKey 非法</li>
 *    <li>-40005: appid 校验错误</li>
 *    <li>-40006: aes 加密失败</li>
 *    <li>-40007: aes 解密失败</li>
 *    <li>-40008: 解密后得到的buffer非法</li>
 *    <li>-40009: base64加密失败</li>
 *    <li>-40010: base64解密失败</li>
 *    <li>-40011: 生成xml失败</li>
 * </ul>
 */
class ErrorCode
{
	public static $OK = 0;
	public static $ValidateSignatureError = -40001;
	public static $ParseXmlError = -40002;
	public static $ComputeSignatureError = -40003;
	public static $IllegalAesKey = -40004;
	public static $ValidateAppidError = -40005;
	public static $EncryptAESError = -40006;
	public static $DecryptAESError = -40007;
	public static $IllegalBuffer = -40008;
	public static $EncodeBase64Error = -40009;
	public static $DecodeBase64Error = -40010;
	public static $GenReturnXmlError = -40011;
}

/**
 * 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 string $xmltext 待提取的xml字符串
	 * @return string 提取出的加密消息字符串
	 */
	public function extract($xmltext)
	{
		try {
			$xml = new DOMDocument();
			$xml->loadXML($xmltext);
			$array_e = $xml->getElementsByTagName('Encrypt');
			$array_a = $xml->getElementsByTagName('ToUserName');
			$encrypt = $array_e->item(0)->nodeValue;
			$tousername = $array_a->item(0)->nodeValue;
			return array(0, $encrypt, $tousername);
		} catch (Exception $e) {
			//print $e . "\n";
			return array(ErrorCode::$ParseXmlError, null, null);
		}
	}

	/**
	 * 生成xml消息
	 * @param string $encrypt 加密后的消息密文
	 * @param string $signature 安全签名
	 * @param string $timestamp 时间戳
	 * @param string $nonce 随机字符串
	 */
	public function generate($encrypt, $signature, $timestamp, $nonce)
	{
		$format = "<xml>
		<Encrypt><![CDATA[%s]]></Encrypt>
		<MsgSignature><![CDATA[%s]]></MsgSignature>
		<TimeStamp>%s</TimeStamp>
		<Nonce><![CDATA[%s]]></Nonce>
		</xml>";
		return sprintf($format, $encrypt, $signature, $timestamp, $nonce);
	}

}

/**
 * SHA1 class
 *
 * 计算公众平台的消息签名接口.
 */
class SHA1
{
	/**
	 * 用SHA1算法生成安全签名
	 * @param string $token 票据
	 * @param string $timestamp 时间戳
	 * @param string $nonce 随机字符串
	 * @param string $encrypt 密文消息
	 */
	public function getSHA1($token, $timestamp, $nonce, $encrypt_msg)
	{
		//排序
		try {
			$array = array($encrypt_msg, $token, $timestamp, $nonce);
			sort($array, SORT_STRING);
			$str = implode($array);
			return array(ErrorCode::$OK, sha1($str));
		} catch (Exception $e) {
			//print $e . "\n";
			return array(ErrorCode::$ComputeSignatureError, null);
		}
	}

}

/**
 * PKCS7Encoder class
 *
 * 提供基于PKCS7算法的加解密接口.
 */
class PKCS7Encoder
{
	public static $block_size = 32;

	/**
	 * 对需要加密的明文进行填充补位
	 * @param $text 需要进行填充补位操作的明文
	 * @return 补齐明文字符串
	 */
	function encode($text)
	{
		$block_size = PKCS7Encoder::$block_size;
		$text_length = strlen($text);
		//计算需要填充的位数
		$amount_to_pad = PKCS7Encoder::$block_size - ($text_length % PKCS7Encoder::$block_size);
		if ($amount_to_pad == 0) {
			$amount_to_pad = PKCS7Encoder::block_size;
		}
		//获得补位所用的字符
		$pad_chr = chr($amount_to_pad);
		$tmp = "";
		for ($index = 0; $index < $amount_to_pad; $index++) {
			$tmp .= $pad_chr;
		}
		return $text . $tmp;
	}

	/**
	 * 对解密后的明文进行补位删除
	 * @param decrypted 解密后的明文
	 * @return 删除填充补位后的明文
	 */
	function decode($text)
	{

		$pad = ord(substr($text, -1));
		if ($pad < 1 || $pad > 32) {
			$pad = 0;
		}
		return substr($text, 0, (strlen($text) - $pad));
	}

}

/**
 * Prpcrypt class
 *
 * 提供接收和推送给公众平台消息的加解密接口.
 */
class Prpcrypt
{
	public $key;

	function Prpcrypt($k)
	{
		$this->key = base64_decode($k . "=");
	}

	/**
	 * 对明文进行加密
	 * @param string $text 需要加密的明文
	 * @return string 加密后的密文
	 */
	public function encrypt($text, $appid)
	{

		try {
			//获得16位随机字符串，填充到明文之前
			$random = $this->getRandomStr();
			$text = $random . pack("N", strlen($text)) . $text . $appid;
			// 网络字节序
			$size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
			$module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
			$iv = substr($this->key, 0, 16);
			//使用自定义的填充方式对明文进行补位填充
			$pkc_encoder = new PKCS7Encoder;
			$text = $pkc_encoder->encode($text);
			mcrypt_generic_init($module, $this->key, $iv);
			//加密
			$encrypted = mcrypt_generic($module, $text);
			mcrypt_generic_deinit($module);
			mcrypt_module_close($module);

			//print(base64_encode($encrypted));
			//使用BASE64对加密后的字符串进行编码
			return array(ErrorCode::$OK, base64_encode($encrypted));
		} catch (Exception $e) {
			//print $e;
			return array(ErrorCode::$EncryptAESError, null);
		}
	}

	/**
	 * 对密文进行解密
	 * @param string $encrypted 需要解密的密文
	 * @return string 解密得到的明文
	 */
	public function decrypt($encrypted, $appid)
	{

		try {
			//使用BASE64对需要解密的字符串进行解码
			$ciphertext_dec = base64_decode($encrypted);
			$module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
			$iv = substr($this->key, 0, 16);
			mcrypt_generic_init($module, $this->key, $iv);

			//解密
			$decrypted = mdecrypt_generic($module, $ciphertext_dec);
			mcrypt_generic_deinit($module);
			mcrypt_module_close($module);
		} catch (Exception $e) {
			return array(ErrorCode::$DecryptAESError, null);
		}


		try {
			//去除补位字符
			$pkc_encoder = new PKCS7Encoder;
			$result = $pkc_encoder->decode($decrypted);
			//去除16位随机字符串,网络字节序和AppId
			if (strlen($result) < 16)
				return "";
			$content = substr($result, 16, strlen($result));
			$len_list = unpack("N", substr($content, 0, 4));
			$xml_len = $len_list[1];
			$xml_content = substr($content, 4, $xml_len);
			$from_appid = substr($content, $xml_len + 4);
		} catch (Exception $e) {
			//print $e;
			return array(ErrorCode::$IllegalBuffer, null);
		}
		if ($from_appid != $appid)
			return array(ErrorCode::$ValidateAppidError, null);
		return array(0, $xml_content);

	}


	/**
	 * 随机生成16位字符串
	 * @return string 生成的字符串
	 */
	function getRandomStr()
	{

		$str = "";
		$str_pol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
		$max = strlen($str_pol) - 1;
		for ($i = 0; $i < 16; $i++) {
			$str .= $str_pol[mt_rand(0, $max)];
		}
		return $str;
	}

}


/**
 * 对公众平台发送给公众账号的消息加解密示例代码.
 *
 * @copyright Copyright (c) 1998-2014 Tencent Inc.
 */


/**
 * 1.第三方回复加密消息给公众平台；
 * 2.第三方收到公众平台发送的消息，验证消息的安全性，并对消息进行解密。
 */
class WXBizMsgCrypt
{
	private $token;
	private $encodingAesKey;
	private $appId;

	/**
	 * 构造函数
	 * @param $token string 公众平台上，开发者设置的token
	 * @param $encodingAesKey string 公众平台上，开发者设置的EncodingAESKey
	 * @param $appId string 公众平台的appId
	 */
	public function WXBizMsgCrypt($token, $encodingAesKey, $appId)
	{
		$this->token = $token;
		$this->encodingAesKey = $encodingAesKey;
		$this->appId = $appId;
	}

	/**
	 * 将公众平台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 string 公众平台待回复用户的消息，xml格式的字符串
	 * @param $timeStamp string 时间戳，可以自己生成，也可以用URL参数的timestamp
	 * @param $nonce string 随机串，可以自己生成，也可以用URL参数的nonce
	 * @param &$encryptMsg string 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,
	 *                      当return返回0时有效
	 *
	 * @return int 成功0，失败返回对应的错误码
	 */
	public function encryptMsg($replyMsg, $timeStamp, $nonce, &$encryptMsg)
	{
		$pc = new Prpcrypt($this->encodingAesKey);

		//加密
		$array = $pc->encrypt($replyMsg, $this->appId);
		$ret = $array[0];
		if ($ret != 0) {
			return $ret;
		}

		if ($timeStamp == null) {
			$timeStamp = time();
		}
		$encrypt = $array[1];

		//生成安全签名
		$sha1 = new SHA1;
		$array = $sha1->getSHA1($this->token, $timeStamp, $nonce, $encrypt);
		$ret = $array[0];
		if ($ret != 0) {
			return $ret;
		}
		$signature = $array[1];

		//生成发送的xml
		$xmlparse = new XMLParse;
		$encryptMsg = $xmlparse->generate($encrypt, $signature, $timeStamp, $nonce);
		return ErrorCode::$OK;
	}


	/**
	 * 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 string 签名串，对应URL参数的msg_signature
	 * @param $timestamp string 时间戳 对应URL参数的timestamp
	 * @param $nonce string 随机串，对应URL参数的nonce
	 * @param $postData string 密文，对应POST请求的数据
	 * @param &$msg string 解密后的原文，当return返回0时有效
	 *
	 * @return int 成功0，失败返回对应的错误码
	 */
	public function decryptMsg($msgSignature, $timestamp = null, $nonce, $postData, &$msg)
	{
		if (strlen($this->encodingAesKey) != 43) {
			return ErrorCode::$IllegalAesKey;
		}

		$pc = new Prpcrypt($this->encodingAesKey);

		//提取密文
		$xmlparse = new XMLParse;
		$array = $xmlparse->extract($postData);
		$ret = $array[0];

		if ($ret != 0) {
			return $ret;
		}

		if ($timestamp == null) {
			$timestamp = time();
		}

		$encrypt = $array[1];
		$touser_name = $array[2];

		//验证安全签名
		$sha1 = new SHA1;
		$array = $sha1->getSHA1($this->token, $timestamp, $nonce, $encrypt);
		$ret = $array[0];

		if ($ret != 0) {
			return $ret;
		}

		$signature = $array[1];
		if ($signature != $msgSignature) {
			return ErrorCode::$ValidateSignatureError;
		}

		$result = $pc->decrypt($encrypt, $this->appId);
		if ($result[0] != 0) {
			return $result[0];
		}
		$msg = $result[1];

		return ErrorCode::$OK;
	}

}</span>

2：获取component_access_token


http请求方式: POST（请使用https协议） 
https://api.weixin.qq.com/cgi-bin/component/api_component_token

POST数据示例:

{
"component_appid":"appid_value" ,
"component_appsecret": "appsecret_value", 
"component_verify_ticket": "ticket_value" 
}getComponentAccessToken()

$url = "https://api.weixin.qq.com/cgi-bin/component/api_component_token";
$curlPost['component_appid'] = $this->appId;
$curlPost['component_appsecret'] = $this->appSecret;
//获取ticket
$dataTicket = json_decode($this->helper->get_php_file(dirname(__FILE__)."/static/component_verify_ticket.php"),true);
$curlPost['component_verify_ticket'] = $dataTicket['component_verify_ticket'];
$curlPost = json_encode($curlPost);
 $res = json_decode($this->helper->httpPost($curlPost, $url), true);
$component_access_token = $res['component_access_token'];
if ($component_access_token) {
$filedata['expire_time'] = time() + 7000;
$filedata['component_access_token'] = $component_access_token;
$this->helper->set_php_file(dirname(__FILE__)."/static/component_access_token.php", json_encode($filedata));
}


3：获取pre_auth_code

http请求方式: POST（请使用https协议）

https://api.weixin.qq.com/cgi-bin/component/api_create_preauthcode?component_access_token=xxx

POST数据示例:

{
"component_appid":"appid_value" 
}


getPreAuthCode()

$component_access_token = $this->getComponentAccessToken();
$url = "https://api.weixin.qq.com/cgi-bin/component/api_create_preauthcode?component_access_token=".$component_access_token;
$curlPost['component_appid'] = $this->appId;
$curlPost = json_encode($curlPost);
$res = json_decode($this->helper->httpPost($curlPost, $url), true);
$pre_auth_code = $res['pre_auth_code'];
if ($pre_auth_code) {
$filedata['expire_time'] = time() + 500;
$filedata['pre_auth_code'] = $pre_auth_code;
$this->helper->set_php_file(dirname(__FILE__)."/static/pre_auth_code.php", json_encode($filedata));
}
4：获取authorizer_access_token

https://api.weixin.qq.com/cgi-bin/component/api_query_auth?component_access_token=xxxx

POST数据示例:

{
"component_appid":"appid_value" ,
"authorization_code": "auth_code_value"
}

auth_code_value需要你在引导用户授权是填写的回调url中获取https://mp.weixin.qq.com/cgi-bin/componentloginpage?component_appid=xxxx&pre_auth_code=xxxxx&redirect_uri=xxxx

getAuthorizationAppid($authorization_code)

$component_access_token = $this->getComponentAccessToken();
$url = "https://api.weixin.qq.com/cgi-bin/component/api_query_auth?component_access_token=".$component_access_token;
$curlPost['component_appid'] = $this->appId;
$curlPost['authorization_code'] = $authorization_code;
$curlPost = json_encode($curlPost);
$res = json_decode($this->helper->httpPost($curlPost, $url), true);
$authorizer_appid = $res ['authorization_info'] ['authorizer_appid'];
if ($authorizer_appid) {
$filedata['expire_time'] = time() + 7000;
$filedata['authorizer_appid'] = $authorizer_appid;
$filedata['authorizer_access_token'] = $res ['authorization_info'] ['authorizer_access_token'];
$filedata['authorizer_refresh_token'] = $res ['authorization_info'] ['authorizer_refresh_token'];
 $filedata['func_info'] = $res ['authorization_info'] ['func_info'];
$this->helper->set_php_file(dirname(__FILE__)."/static/authorization_code.php", json_encode($filedata));
}

5：获取公众信息

http请求方式: POST（请使用https协议）
https://api.weixin.qq.com/cgi-bin/component/api_get_authorizer_info?component_access_token=xxxx

POST数据示例:

{
"component_appid":"appid_value" ,
"authorizer_appid": "auth_appid_value" 
}getAuthorizationInfo($authorizer_appid)

$component_access_token = $this->getComponentAccessToken();
$url = "https://api.weixin.qq.com/cgi-bin/component/api_get_authorizer_info?       component_access_token=".$component_access_token;
$curlPost['component_appid'] = $this->appId;
$curlPost['authorizer_appid'] = $authorizer_appid;
$curlPost = json_encode($curlPost);
 $res = json_decode($this->helper->httpPost($curlPost, $url), true);

最后把获取到的信息存入数据库 下载代码

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