更新内核
增加自定义表单（未完成）
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176
core/extend/Wechat/Lib/Prpcrypt.php
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176
core/extend/Wechat/Lib/Prpcrypt.php
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<?php
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/**
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* PKCS7算法 加解密
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* @category WechatSDK
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* @subpackage library
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* @date 2016/06/28 11:59
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*/
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class PKCS7Encoder {
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public static $block_size = 32;
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/**
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* 对需要加密的明文进行填充补位
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* @param string $text 需要进行填充补位操作的明文
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* @return string 补齐明文字符串
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*/
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function encode($text) {
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$amount_to_pad = PKCS7Encoder::$block_size - (strlen($text) % PKCS7Encoder::$block_size);
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if ($amount_to_pad == 0) {
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$amount_to_pad = PKCS7Encoder::$block_size;
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}
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$pad_chr = chr($amount_to_pad);
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$tmp = "";
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for ($index = 0; $index < $amount_to_pad; $index++) {
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$tmp .= $pad_chr;
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}
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return $text . $tmp;
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}
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/**
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* 对解密后的明文进行补位删除
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* @param string $text 解密后的明文
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* @return string 删除填充补位后的明文
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*/
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function decode($text) {
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$pad = ord(substr($text, -1));
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if ($pad < 1 || $pad > PKCS7Encoder::$block_size) {
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$pad = 0;
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}
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return substr($text, 0, (strlen($text) - $pad));
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}
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}
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/**
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* 接收和推送给公众平台消息的加解密
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* @category WechatSDK
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* @subpackage library
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* @date 2016/06/28 11:59
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*/
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class Prpcrypt {
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public $key;
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function __construct($k) {
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$this->key = base64_decode($k . "=");
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}
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/**
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* 对明文进行加密
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* @param string $text 需要加密的明文
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* @param string $appid 公众号APPID
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* @return string 加密后的密文
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*/
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public function encrypt($text, $appid) {
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try {
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//获得16位随机字符串，填充到明文之前
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$random = $this->getRandomStr();//"aaaabbbbccccdddd";
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$text = $random . pack("N", strlen($text)) . $text . $appid;
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$iv = substr($this->key, 0, 16);
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$pkc_encoder = new PKCS7Encoder;
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$text = $pkc_encoder->encode($text);
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$encrypted = openssl_encrypt($text, 'AES-256-CBC', substr($this->key, 0, 32), OPENSSL_ZERO_PADDING, $iv);
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return array(ErrorCode::$OK, $encrypted);
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} catch (Exception $e) {
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return array(ErrorCode::$EncryptAESError, null);
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}
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}
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/**
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* 对密文进行解密
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* @param string $encrypted 需要解密的密文
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* @param string $appid 公众号APPID
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* @return string 解密得到的明文
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*/
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public function decrypt($encrypted, $appid) {
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try {
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$iv = substr($this->key, 0, 16);
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$decrypted = openssl_decrypt($encrypted, 'AES-256-CBC', substr($this->key, 0, 32), OPENSSL_ZERO_PADDING, $iv);
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} catch (Exception $e) {
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return array(ErrorCode::$DecryptAESError, null);
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}
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try {
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$pkc_encoder = new PKCS7Encoder;
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$result = $pkc_encoder->decode($decrypted);
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if (strlen($result) < 16) {
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return "";
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}
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$content = substr($result, 16, strlen($result));
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$len_list = unpack("N", substr($content, 0, 4));
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$xml_len = $len_list[1];
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$xml_content = substr($content, 4, $xml_len);
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$from_appid = substr($content, $xml_len + 4);
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if (!$appid) {
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$appid = $from_appid;
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}
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} catch (Exception $e) {
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return array(ErrorCode::$IllegalBuffer, null);
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}
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return array(0, $xml_content, $from_appid);
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}
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/**
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* 随机生成16位字符串
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* @return string 生成的字符串
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*/
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function getRandomStr() {
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$str = "";
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$str_pol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
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$max = strlen($str_pol) - 1;
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for ($i = 0; $i < 16; $i++) {
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$str .= $str_pol[mt_rand(0, $max)];
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}
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return $str;
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}
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}
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/**
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* 仅用作类内部使用
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* 不用于官方API接口的errCode码
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* Class ErrorCode
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*/
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class ErrorCode {
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public static $OK = 0;
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public static $ValidateSignatureError = 40001;
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public static $ParseXmlError = 40002;
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public static $ComputeSignatureError = 40003;
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public static $IllegalAesKey = 40004;
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public static $ValidateAppidError = 40005;
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public static $EncryptAESError = 40006;
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public static $DecryptAESError = 40007;
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public static $IllegalBuffer = 40008;
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public static $EncodeBase64Error = 40009;
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public static $DecodeBase64Error = 40010;
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public static $GenReturnXmlError = 40011;
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public static $errCode = array(
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'0' => '处理成功',
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'40001' => '校验签名失败',
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'40002' => '解析xml失败',
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'40003' => '计算签名失败',
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'40004' => '不合法的AESKey',
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'40005' => '校验AppID失败',
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'40006' => 'AES加密失败',
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'40007' => 'AES解密失败',
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'40008' => '公众平台发送的xml不合法',
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'40009' => 'Base64编码失败',
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'40010' => 'Base64解码失败',
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'40011' => '公众帐号生成回包xml失败'
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);
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/**
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* 获取错误消息内容
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* @param string $err
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* @return bool
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*/
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public static function getErrText($err) {
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if (isset(self::$errCode[$err])) {
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return self::$errCode[$err];
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}
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return false;
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}
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}
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