add clear

2019-11-11 18:14:47 +08:00
parent 62a2326e23
commit 7f138ef255
47 changed files with 2440 additions and 1100 deletions
@@ -0,0 +1,119 @@
+<?php
+
+
+namespace officialaccount\dcaler;
+
+
+use officialaccount\NewsManager;
+
+class Prpcrypt
+{
+	public $key;
+
+	/**
+	 * Prpcrypt constructor.
+	 * @param $k
+	 */
+	public function __construct($k)
+	{
+		$this->key = base64_decode($k . "=");
+	}
+
+	/**
+	 * @param $text
+	 * @param $appid
+	 * @return array
+	 */
+	public function encrypt($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(NewsManager::OK, base64_encode($encrypted));
+		} catch (\Exception $e) {
+			//print $e;
+			return array(NewsManager::EncryptAESError, null);
+		}
+	}
+
+	/**
+	 * @param $encrypted
+	 * @param $appid
+	 * @return array|string
+	 */
+	public function decrypt($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(NewsManager::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 $e;
+			return array(NewsManager::IllegalBuffer, null);
+		}
+		if ($from_appid != $appid)
+			return array(NewsManager::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;
+	}
+
+}