|
@@ -0,0 +1,258 @@
|
|
|
+<?php
|
|
|
+
|
|
|
+namespace App\Channels\Components;
|
|
|
+
|
|
|
+use Exception;
|
|
|
+
|
|
|
+class WeChat
|
|
|
+{
|
|
|
+ public function VerifyURL($sMsgSignature, $sTimeStamp, $sNonce, $sEchoStr, &$sReplyEchoStr)
|
|
|
+ { // 验证URL
|
|
|
+ //verify msg_signature
|
|
|
+ $array = $this->getSHA1($sTimeStamp, $sNonce, $sEchoStr);
|
|
|
+ $ret = $array[0];
|
|
|
+
|
|
|
+ if ($ret !== 0) {
|
|
|
+ return $ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ $signature = $array[1];
|
|
|
+ if ($signature !== $sMsgSignature) {
|
|
|
+ return -40001; // ValidateSignatureError
|
|
|
+ }
|
|
|
+
|
|
|
+ $result = (new Prpcrypt())->decrypt($sEchoStr);
|
|
|
+ if ($result[0] !== 0) {
|
|
|
+ return $result[0];
|
|
|
+ }
|
|
|
+ $sReplyEchoStr = $result[1];
|
|
|
+
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ public function getSHA1($timestamp, $nonce, $encrypt_msg)
|
|
|
+ {
|
|
|
+ //排序
|
|
|
+ try {
|
|
|
+ $array = [$encrypt_msg, sysConfig('wechat_token'), $timestamp, $nonce];
|
|
|
+ sort($array, SORT_STRING);
|
|
|
+
|
|
|
+ return [0, sha1(implode($array))];
|
|
|
+ } catch (Exception $e) {
|
|
|
+ echo $e->__toString()."\n";
|
|
|
+
|
|
|
+ return [-40003, null]; // ComputeSignatureError
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ public function EncryptMsg($sReplyMsg, $sTimeStamp, $sNonce, &$sEncryptMsg)
|
|
|
+ { //将公众平台回复用户的消息加密打包.
|
|
|
+ //加密
|
|
|
+ $array = (new Prpcrypt())->encrypt($sReplyMsg);
|
|
|
+ $ret = $array[0];
|
|
|
+ if ($ret !== 0) {
|
|
|
+ return $ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ if ($sTimeStamp === null) {
|
|
|
+ $sTimeStamp = time();
|
|
|
+ }
|
|
|
+ $encrypt = $array[1];
|
|
|
+
|
|
|
+ //生成安全签名
|
|
|
+ $array = $this->getSHA1($sTimeStamp, $sNonce, $encrypt);
|
|
|
+ $ret = $array[0];
|
|
|
+ if ($ret !== 0) {
|
|
|
+ return $ret;
|
|
|
+ }
|
|
|
+ $signature = $array[1];
|
|
|
+
|
|
|
+ //生成发送的xml
|
|
|
+ $sEncryptMsg = $this->generate($encrypt, $signature, $sTimeStamp, $sNonce);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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, $nonce);
|
|
|
+ }
|
|
|
+
|
|
|
+ public function DecryptMsg($sMsgSignature, $sTimeStamp = null, $sNonce, $sPostData, &$sMsg)
|
|
|
+ { // 检验消息的真实性,并且获取解密后的明文.
|
|
|
+ //提取密文
|
|
|
+ $array = $this->extract($sPostData);
|
|
|
+ $ret = $array[0];
|
|
|
+
|
|
|
+ if ($ret !== 0) {
|
|
|
+ return $ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ if ($sTimeStamp === null) {
|
|
|
+ $sTimeStamp = time();
|
|
|
+ }
|
|
|
+
|
|
|
+ $encrypt = $array[1];
|
|
|
+
|
|
|
+ //验证安全签名
|
|
|
+ $array = $this->getSHA1($sTimeStamp, $sNonce, $encrypt);
|
|
|
+ $ret = $array[0];
|
|
|
+
|
|
|
+ if ($ret !== 0) {
|
|
|
+ return $ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ $signature = $array[1];
|
|
|
+ if ($signature !== $sMsgSignature) {
|
|
|
+ return -40001; // ValidateSignatureError
|
|
|
+ }
|
|
|
+ $result = (new Prpcrypt())->decrypt($encrypt);
|
|
|
+ if ($result[0] !== 0) {
|
|
|
+ return $result[0];
|
|
|
+ }
|
|
|
+ $sMsg = $result[1];
|
|
|
+
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 提取出xml数据包中的加密消息.
|
|
|
+ *
|
|
|
+ * @param string $xmltext 待提取的xml字符串
|
|
|
+ * @return array 提取出的加密消息字符串
|
|
|
+ */
|
|
|
+ public function extract($xmltext)
|
|
|
+ {
|
|
|
+ try {
|
|
|
+ $xml = new DOMDocument();
|
|
|
+ $xml->loadXML($xmltext);
|
|
|
+ $array_e = $xml->getElementsByTagName('Encrypt');
|
|
|
+ $encrypt = $array_e->item(0)->nodeValue;
|
|
|
+
|
|
|
+ return [0, $encrypt];
|
|
|
+ } catch (Exception $e) {
|
|
|
+ echo $e."\n";
|
|
|
+
|
|
|
+ return [-40002, null]; // ParseXmlError
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * PKCS7Encoder class.
|
|
|
+ *
|
|
|
+ * 提供基于PKCS7算法的加解密接口.
|
|
|
+ */
|
|
|
+class PKCS7Encoder
|
|
|
+{
|
|
|
+ public static $block_size = 32;
|
|
|
+
|
|
|
+ public function encode($text)
|
|
|
+ { // 对需要加密的明文进行填充补位
|
|
|
+ //计算需要填充的位数
|
|
|
+ $amount_to_pad = self::$block_size - (strlen($text) % self::$block_size);
|
|
|
+ if ($amount_to_pad === 0) {
|
|
|
+ $amount_to_pad = self::$block_size;
|
|
|
+ }
|
|
|
+
|
|
|
+ return $text.str_repeat(chr($amount_to_pad), $amount_to_pad); // 获得补位所用的字符
|
|
|
+ }
|
|
|
+
|
|
|
+ public function decode($text)
|
|
|
+ { // 对解密后的明文进行补位删除
|
|
|
+ $pad = ord(substr($text, -1));
|
|
|
+ if ($pad < 1 || $pad > self::$block_size) {
|
|
|
+ $pad = 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ return substr($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 = null;
|
|
|
+ public $iv = null;
|
|
|
+
|
|
|
+ public function __construct()
|
|
|
+ {
|
|
|
+ $this->key = base64_decode(sysConfig('wechat_encodingAESKey').'=');
|
|
|
+ $this->iv = substr($this->key, 0, 16);
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 加密.
|
|
|
+ *
|
|
|
+ * @param $text
|
|
|
+ * @return array
|
|
|
+ */
|
|
|
+ public function encrypt($text)
|
|
|
+ {
|
|
|
+ try {
|
|
|
+ //拼接
|
|
|
+ $text = Str::random().pack('N', strlen($text)).$text.sysConfig('wechat_cid');
|
|
|
+ //添加PKCS#7填充
|
|
|
+ $text = (new PKCS7Encoder)->encode($text);
|
|
|
+ //加密
|
|
|
+ $encrypted = openssl_encrypt($text, 'AES-256-CBC', $this->key, OPENSSL_ZERO_PADDING, $this->iv);
|
|
|
+
|
|
|
+ return [0, $encrypted];
|
|
|
+ } catch (Exception $e) {
|
|
|
+ echo $e->__toString();
|
|
|
+
|
|
|
+ return [-40006, null]; // EncryptAESError
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ public function decrypt($encrypted): array
|
|
|
+ { // 解密
|
|
|
+ try {
|
|
|
+ //解密
|
|
|
+ $decrypted = openssl_decrypt($encrypted, 'AES-256-CBC', $this->key, OPENSSL_ZERO_PADDING, $this->iv);
|
|
|
+ } catch (Exception $e) {
|
|
|
+ return [-40007, null]; // DecryptAESError
|
|
|
+ }
|
|
|
+ try {
|
|
|
+ //删除PKCS#7填充
|
|
|
+ $result = (new PKCS7Encoder)->decode($decrypted);
|
|
|
+ if (strlen($result) < 16) {
|
|
|
+ return [];
|
|
|
+ }
|
|
|
+ //拆分
|
|
|
+ $content = substr($result, 16, strlen($result));
|
|
|
+ $len_list = unpack('N', substr($content, 0, 4));
|
|
|
+ $xml_len = $len_list[1];
|
|
|
+ $xml_content = substr($content, 4, $xml_len);
|
|
|
+ $from_receiveId = substr($content, $xml_len + 4);
|
|
|
+ } catch (Exception $e) {
|
|
|
+ echo $e->__toString();
|
|
|
+
|
|
|
+ return [-40008, null]; // IllegalBuffer
|
|
|
+ }
|
|
|
+ if ($from_receiveId !== sysConfig('wechat_cid')) {
|
|
|
+ return [-40005, null]; // ValidateCorpidError
|
|
|
+ }
|
|
|
+
|
|
|
+ return [0, $xml_content];
|
|
|
+ }
|
|
|
+}
|