diff --git a/.gitignore b/.gitignore
index 28b28ee..850242e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 sync.sh
+build.sh
+.idea/
diff --git a/wxwork_finance_sdk.c b/wxwork_finance_sdk.c
index de85618..49069d1 100644
--- a/wxwork_finance_sdk.c
+++ b/wxwork_finance_sdk.c
@@ -140,6 +140,31 @@ PHP_METHOD(WxworkFinanceSdk, getChatData)
 }
 /* }}} */
 
+/**
+    {{{ proto WxworkFinanceSdk->decryptData(string $encryptRandomKey, string $encryptData)
+*/
+PHP_METHOD(WxworkFinanceSdk, decryptData)
+{
+    zend_string *encrypt_random_key, *encrypt_data;
+
+    if (zend_parse_parameters(ZEND_NUM_ARGS(), "SS", &encrypt_random_key, &encrypt_data) == FAILURE) {
+        return;
+    }
+
+    Slice_t *msg = NewSlice();
+
+    int ret = DecryptData(ZSTR_VAL(encrypt_random_key), ZSTR_VAL(encrypt_data), msg);
+    if (ret != 0) {
+        zend_throw_exception(spl_ce_InvalidArgumentException, "DecryptData data error", ret);
+        return;
+    }
+
+    zend_string *return_msg = zend_string_init(GetContentFromSlice(msg), GetSliceLen(msg), 0);
+
+    RETURN_STR(return_msg);
+    FreeSlice(msg);
+    zend_string_release(return_msg);
+}
 
 /**
     {{{ proto WxworkFinanceSdk->getMediaData(string $filedId, string $index='')
@@ -187,6 +212,7 @@ static const zend_function_entry wxwork_finance_sdk_class_methods[] = {
     PHP_ME(WxworkFinanceSdk, __construct, NULL, ZEND_ACC_PUBLIC|ZEND_ACC_CTOR)
     PHP_ME(WxworkFinanceSdk, getChatData, NULL, ZEND_ACC_PUBLIC)
     PHP_ME(WxworkFinanceSdk, getMediaData, NULL, ZEND_ACC_PUBLIC)
+    PHP_ME(WxworkFinanceSdk, decryptData, NULL, ZEND_ACC_PUBLIC)
     PHP_FE_END
 };
 
@@ -299,7 +325,7 @@ PHP_RINIT_FUNCTION(wxwork_finance_sdk)
 
     sdk = NewSdk();
 
-	return SUCCESS;
+    return SUCCESS;
 }
 /* }}} */
 
diff --git a/wxwork_finance_sdk.php b/wxwork_finance_sdk.php
index 5194bff..2cb9ec5 100644
--- a/wxwork_finance_sdk.php
+++ b/wxwork_finance_sdk.php
@@ -2,18 +2,26 @@
 
 echo "version=", WxworkFinanceSdk::VERSION, PHP_EOL;
 
+
 try {
 $obj = new WxworkFinanceSdk("wwd08coe7d775abaaa", "zJ6k0naVVQ--gt9PUSSEvs03zW_nlDVmjAkPOTAfrew", [
     "proxy_host" => "hello",
     "proxy_password" => "world",
     "timeout" => -2,
 ]);
-var_dump($obj);
+// 私钥地址
+$privateKey = file_get_contents('private.pem');
 
-var_dump(json_decode($obj->getChatData(0, 100)));
-var_dump($obj->getMediaData("dddd"));
+$chats = json_decode($obj->getChatData(0, 100), true);
+
+foreach ($chats['chatdata'] as $val) {
+    $decryptRandKey = null;
+    openssl_private_decrypt(base64_decode($val['encrypt_random_key']), $decryptRandKey, $privateKey, OPENSSL_PKCS1_PADDING);
+    $j = json_decode($obj->decryptData($decryptRandKey, $val['encrypt_chat_msg']));
+    var_dump($j);exit();
+}
 
 
-}catch(\Exception $e) {
+}catch(\WxworkFinanceSdkException $e) {
     var_dump($e->getMessage(), $e->getCode());
 }
\ No newline at end of file