diff --git a/package.json b/package.json
index 3fa9ac8..1b05acf 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "name": "tauri-app",
+  "name": "phiz-pay-tools",
   "private": true,
   "version": "0.1.0",
   "type": "module",
diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index 719b1cb..0c2152e 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -306,8 +306,10 @@ checksum = "a21f936df1771bf62b77f047b726c4625ff2e8aa607c01ec06e5a05bd8463401"
 dependencies = [
  "android-tzdata",
  "iana-time-zone",
+ "js-sys",
  "num-traits",
  "serde",
+ "wasm-bindgen",
  "windows-targets 0.52.6",
 ]
 
@@ -1649,6 +1651,17 @@ dependencies = [
  "objc_exception",
 ]
 
+[[package]]
+name = "objc-foundation"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1add1b659e36c9607c7aab864a76c7a4c2760cd0cd2e120f3fb8b952c7e22bf9"
+dependencies = [
+ "block",
+ "objc",
+ "objc_id",
+]
+
 [[package]]
 name = "objc_exception"
 version = "0.1.2"
@@ -1692,6 +1705,44 @@ dependencies = [
  "windows-sys 0.42.0",
 ]
 
+[[package]]
+name = "openssl"
+version = "0.10.66"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9529f4786b70a3e8c61e11179af17ab6188ad8d0ded78c5529441ed39d4bd9c1"
+dependencies = [
+ "bitflags 2.6.0",
+ "cfg-if",
+ "foreign-types",
+ "libc",
+ "once_cell",
+ "openssl-macros",
+ "openssl-sys",
+]
+
+[[package]]
+name = "openssl-macros"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.76",
+]
+
+[[package]]
+name = "openssl-sys"
+version = "0.9.103"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f9e8deee91df40a943c71b917e5874b951d32a802526c85721ce3b776c929d6"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+ "vcpkg",
+]
+
 [[package]]
 name = "overload"
 version = "0.1.1"
@@ -2175,6 +2226,30 @@ version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7a66a03ae7c801facd77a29370b4faec201768915ac14a721ba36f20bc9c209b"
 
+[[package]]
+name = "rfd"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0149778bd99b6959285b0933288206090c50e2327f47a9c463bfdbf45c8823ea"
+dependencies = [
+ "block",
+ "dispatch",
+ "glib-sys",
+ "gobject-sys",
+ "gtk-sys",
+ "js-sys",
+ "lazy_static",
+ "log",
+ "objc",
+ "objc-foundation",
+ "objc_id",
+ "raw-window-handle",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+ "windows 0.37.0",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.24"
@@ -2659,6 +2734,7 @@ dependencies = [
  "rand 0.8.5",
  "raw-window-handle",
  "regex",
+ "rfd",
  "semver",
  "serde",
  "serde_json",
@@ -2684,10 +2760,13 @@ dependencies = [
 name = "tauri-app"
 version = "0.1.0"
 dependencies = [
+ "chrono",
+ "openssl",
  "serde",
  "serde_json",
  "tauri",
  "tauri-build",
+ "thiserror",
 ]
 
 [[package]]
@@ -3142,6 +3221,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
 
+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
+
 [[package]]
 name = "version-compare"
 version = "0.0.11"
@@ -3228,6 +3313,18 @@ dependencies = [
  "wasm-bindgen-shared",
 ]
 
+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61e9300f63a621e96ed275155c108eb6f843b6a26d053f122ab69724559dc8ed"
+dependencies = [
+ "cfg-if",
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
 [[package]]
 name = "wasm-bindgen-macro"
 version = "0.2.93"
@@ -3257,6 +3354,16 @@ version = "0.2.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c62a0a307cb4a311d3a07867860911ca130c3494e8c2719593806c08bc5d0484"
 
+[[package]]
+name = "web-sys"
+version = "0.3.70"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26fdeaafd9bd129f65e7c031593c24d62186301e0c72c8978fa1678be7d532c0"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "webkit2gtk"
 version = "0.18.2"
@@ -3373,6 +3480,19 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57b543186b344cc61c85b5aab0d2e3adf4e0f99bc076eff9aa5927bcc0b8a647"
+dependencies = [
+ "windows_aarch64_msvc 0.37.0",
+ "windows_i686_gnu 0.37.0",
+ "windows_i686_msvc 0.37.0",
+ "windows_x86_64_gnu 0.37.0",
+ "windows_x86_64_msvc 0.37.0",
+]
+
 [[package]]
 name = "windows"
 version = "0.39.0"
@@ -3537,6 +3657,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2623277cb2d1c216ba3b578c0f3cf9cdebeddb6e66b1b218bb33596ea7769c3a"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.39.0"
@@ -3561,6 +3687,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3925fd0b0b804730d44d4b6278c50f9699703ec49bcd628020f46f4ba07d9e1"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.39.0"
@@ -3591,6 +3723,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce907ac74fe331b524c1298683efbf598bb031bc84d5e274db2083696d07c57c"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.39.0"
@@ -3615,6 +3753,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2babfba0828f2e6b32457d5341427dcbb577ceef556273229959ac23a10af33d"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.39.0"
@@ -3657,6 +3801,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4dd6dc7df2d84cf7b33822ed5b86318fb1781948e9663bacd047fc9dd52259d"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.39.0"
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index fda571b..864a7ae 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -11,9 +11,12 @@ edition = "2021"
 tauri-build = { version = "1", features = [] }
 
 [dependencies]
-tauri = { version = "1", features = ["shell-open"] }
+tauri = { version = "1", features = [ "path-all", "dialog-all", "shell-open"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+openssl = "0.10.66"
+thiserror = "1.0.63"
+chrono = "0.4.38"
 
 [features]
 # This feature is used for production builds or when a dev server is not specified, DO NOT REMOVE!!
diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
index 523550d..83409b5 100644
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -1,15 +1,81 @@
 // Prevents additional console window on Windows in release, DO NOT REMOVE!!
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
-// Learn more about Tauri commands at https://tauri.app/v1/guides/features/command
+use openssl::{
+    asn1::Asn1Time,
+    pkey::PKey,
+    rsa::Rsa,
+    x509::{X509Builder, X509NameBuilder},
+};
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+// create the error type that represents all errors possible in our program
+#[derive(Debug, thiserror::Error)]
+enum Error {
+    #[error(transparent)]
+    Io(#[from] std::io::Error),
+    #[error(transparent)]
+    ErrorStack(#[from] openssl::error::ErrorStack),
+}
+
+// we must manually implement serde::Serialize
+impl serde::Serialize for Error {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::ser::Serializer,
+    {
+        serializer.serialize_str(self.to_string().as_ref())
+    }
+}
+
 #[tauri::command]
-fn greet(name: &str) -> String {
-    format!("Hello, {}! You've been greeted from Rust!", name)
+fn gen_rsa_pair(merchant_id: &str, email: &str, save_path: &str) -> Result<(), Error> {
+    println!("--- Begin ---");
+
+    // 生成 2048 位的 RSA 私钥
+    let rsa = Rsa::generate(2048)?;
+    // 创建私钥
+    let private_key = PKey::from_rsa(rsa)?;
+
+    let mut x509_name_builder = X509NameBuilder::new()?;
+    x509_name_builder.append_entry_by_text("CN", "PHIZ")?;
+    x509_name_builder.append_entry_by_text("O", merchant_id)?;
+    x509_name_builder.append_entry_by_text("OU", email)?;
+    let x509_name = x509_name_builder.build();
+
+    let mut x509_builder: X509Builder = X509Builder::new()?;
+    x509_builder.set_subject_name(&x509_name)?;
+    x509_builder.set_issuer_name(&x509_name)?;
+    x509_builder.set_pubkey(&private_key)?;
+    x509_builder.set_not_before(&Asn1Time::days_from_now(0).unwrap())?;
+    x509_builder.set_not_after(&Asn1Time::days_from_now(1095).unwrap())?;
+    x509_builder.sign(&private_key, openssl::hash::MessageDigest::sha256())?;
+    let x509 = x509_builder.build();
+
+    // 将私钥转换为 PEM 格式
+    let private_key_pem = private_key.private_key_to_pem_pkcs8()?;
+    // 保存私钥到文件
+    let private_key_path = PathBuf::from(format!("{}/{}_private_key.pem", save_path, merchant_id));
+    let mut private_key_file = File::create(&private_key_path)?;
+    private_key_file.write_all(&private_key_pem)?;
+
+    // // 将证书转换为 PEM 格式
+    let certificate_pem = x509.to_pem()?;
+    // 保存证书到文件
+    let certificate_path = format!("{}/{}_certificate.pem", save_path, merchant_id);
+    let mut certificate_file = File::create(&certificate_path)?;
+    certificate_file.write_all(&certificate_pem)?;
+
+    println!("--- Success ---");
+
+    Ok(())
 }
 
 fn main() {
     tauri::Builder::default()
-        .invoke_handler(tauri::generate_handler![greet])
+        .invoke_handler(tauri::generate_handler![gen_rsa_pair])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");
 }
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index 08b7dc6..f3f9ec2 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -6,7 +6,7 @@
     "distDir": "../dist"
   },
   "package": {
-    "productName": "tauri-app",
+    "productName": "PhizPayTools",
     "version": "0.1.0"
   },
   "tauri": {
@@ -15,13 +15,24 @@
       "shell": {
         "all": false,
         "open": true
+      },
+      "dialog": {
+        "all": true,
+        "ask": true,
+        "confirm": true,
+        "message": true,
+        "open": true,
+        "save": true
+      },
+      "path": {
+        "all": true
       }
     },
     "windows": [
       {
-        "title": "tauri-app",
-        "width": 800,
-        "height": 600
+        "title": "PhizPay Tools",
+        "width": 1280,
+        "height": 800
       }
     ],
     "security": {
@@ -30,14 +41,8 @@
     "bundle": {
       "active": true,
       "targets": "all",
-      "identifier": "com.tauri-app.app",
-      "icon": [
-        "icons/32x32.png",
-        "icons/128x128.png",
-        "icons/128x128@2x.png",
-        "icons/icon.icns",
-        "icons/icon.ico"
-      ]
+      "identifier": "com.phiz.pay.tool",
+      "icon": ["icons/32x32.png", "icons/128x128.png", "icons/128x128@2x.png", "icons/icon.icns", "icons/icon.ico"]
     }
   }
 }
diff --git a/src/App.vue b/src/App.vue
index 696fef7..3cbec9b 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,25 +1,59 @@
 <script setup lang="ts">
 import { ref } from 'vue'
 import { invoke } from '@tauri-apps/api/tauri'
+import { message, open } from '@tauri-apps/api/dialog'
+import { downloadDir } from '@tauri-apps/api/path'
 
-const greetMsg = ref('')
-const name = ref('')
+const merchantId = ref('P80029767866')
+const email = ref('zaeyee@163.com')
 
-async function greet() {
-  // Learn more about Tauri commands at https://tauri.app/v1/guides/features/command
-  greetMsg.value = await invoke('greet', { name: name.value })
+async function genPrivateKey() {
+  try {
+    const savePath = await open({
+      title: 'Select a directory to save',
+      defaultPath: await downloadDir(),
+      directory: true,
+      recursive: true
+    })
+    if (!savePath) {
+      return message('Please select a directory to save')
+    }
+    await invoke('gen_rsa_pair', { merchantId: merchantId.value, email: email.value, savePath })
+    message('Successfully generated', 'Success')
+  } catch {
+    message('Generation failed', 'Error')
+  }
 }
 </script>
 
 <template>
-  <div class="container text-center py-4">
-    <form class="flex justify-center" @submit.prevent="greet">
-      <input v-model="name" placeholder="Enter a name..." />
-      <button type="submit" class="ml-2">Greet</button>
-    </form>
-
-    <p class="mt-4">{{ greetMsg }}</p>
-  </div>
+  <form class="py-4 container w-100 mt-20" @submit.prevent="genPrivateKey">
+    <div for="merchantId">
+      <div class="mb-2">Merchant ID</div>
+      <input
+        v-model="merchantId"
+        id="merchantId"
+        placeholder="Enter your merchant id"
+        class="w-full px-3 py-2 rounded-lg bg-zinc-1 duration-300 focus:bg-zinc-2"
+      />
+    </div>
+    <div for="Email" class="mt-4">
+      <div class="mb-2">Email</div>
+      <input
+        v-model="email"
+        placeholder="Enter your email"
+        class="w-full px-3 py-2 rounded-lg bg-zinc-1 duration-300 focus:bg-zinc-2"
+      />
+    </div>
+    <div class="mt-4">
+      <button
+        type="submit"
+        class="w-full px-3 py-2 bg-primary c-white rounded-lg hover:op-80 active:op-100 duration-300"
+      >
+        Generate
+      </button>
+    </div>
+  </form>
 </template>
 
 <style scoped>
@@ -39,32 +73,6 @@ async function greet() {
   -webkit-text-size-adjust: 100%;
 }
 
-input,
-button {
-  border-radius: 8px;
-  border: 1px solid transparent;
-  padding: 0.6em 1.2em;
-  font-size: 1em;
-  font-weight: 500;
-  font-family: inherit;
-  color: #0f0f0f;
-  background-color: #ffffff;
-  transition: border-color 0.25s;
-  box-shadow: 0 2px 2px rgba(0, 0, 0, 0.2);
-}
-
-button {
-  cursor: pointer;
-}
-
-button:hover {
-  border-color: #396cd8;
-}
-button:active {
-  border-color: #396cd8;
-  background-color: #e8e8e8;
-}
-
 input,
 button {
   outline: none;
diff --git a/uno.config.ts b/uno.config.ts
index c24d053..b1088c7 100644
--- a/uno.config.ts
+++ b/uno.config.ts
@@ -4,7 +4,10 @@ export default defineConfig({
   shortcuts: {},
   theme: {
     colors: {
-      primary: 'var(--c-primary)'
+      primary: '#fe7716'
+    },
+    container: {
+      center: true
     }
   },
   presets: [