Support SSO using default browser

.vscode/settings.json

@@ -11,8 +11,10 @@
         "dotenvy",
         "getconfig",
         "globalprotect",
+        "globalprotectcallback",
         "gpapi",
         "gpauth",
+        "gpcallback",
         "gpclient",
         "gpcommon",
         "gpgui",
@@ -50,5 +52,6 @@
         "wmctrl",
         "XAUTHORITY",
         "yuezk"
-    ]
+    ],
+    "rust-analyzer.cargo.features": "all",
 }

Cargo.lock

@@ -1423,7 +1423,7 @@ dependencies = [
 
 [[package]]
 name = "gpapi"
-version = "2.0.0-beta4"
+version = "2.0.0-beta5"
 dependencies = [
  "anyhow",
  "base64 0.21.5",
@@ -1431,6 +1431,7 @@ dependencies = [
  "clap",
  "dotenvy_macro",
  "log",
+ "open",
  "redact-engine",
  "regex",
  "reqwest",
@@ -1451,7 +1452,7 @@ dependencies = [
 
 [[package]]
 name = "gpauth"
-version = "2.0.0-beta4"
+version = "2.0.0-beta5"
 dependencies = [
  "anyhow",
  "clap",
@@ -1471,7 +1472,7 @@ dependencies = [
 
 [[package]]
 name = "gpclient"
-version = "2.0.0-beta4"
+version = "2.0.0-beta5"
 dependencies = [
  "anyhow",
  "clap",
@@ -1492,7 +1493,7 @@ dependencies = [
 
 [[package]]
 name = "gpservice"
-version = "2.0.0-beta4"
+version = "2.0.0-beta5"
 dependencies = [
  "anyhow",
  "axum",
@@ -1963,6 +1964,15 @@ version = "2.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f518f335dce6725a761382244631d86cf0ccb2863413590b31338feb467f9c3"
 
+[[package]]
+name = "is-docker"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "928bae27f42bc99b60d9ac7334e3a21d10ad8f1835a4e12ec3ec0464765ed1b3"
+dependencies = [
+ "once_cell",
+]
+
 [[package]]
 name = "is-terminal"
 version = "0.4.10"
@@ -1974,6 +1984,16 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "is-wsl"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "173609498df190136aa7dea1a91db051746d339e18476eed5ca40521f02d7aa5"
+dependencies = [
+ "is-docker",
+ "once_cell",
+]
+
 [[package]]
 name = "is_executable"
 version = "1.0.1"
@@ -2445,9 +2465,20 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 
+[[package]]
+name = "open"
+version = "5.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90878fb664448b54c4e592455ad02831e23a3f7e157374a8b95654731aac7349"
+dependencies = [
+ "is-wsl",
+ "libc",
+ "pathdiff",
+]
+
 [[package]]
 name = "openconnect"
-version = "2.0.0-beta4"
+version = "2.0.0-beta5"
 dependencies = [
  "cc",
  "is_executable",
@@ -2574,6 +2605,12 @@ version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "de3145af08024dea9fa9914f381a17b8fc6034dfb00f3a84013f7ff43f29ed4c"
 
+[[package]]
+name = "pathdiff"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8835116a5c179084a830efb3adc117ab007512b535bc1a21c991d3b32a6b44dd"
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.1"

Cargo.toml

@@ -4,7 +4,7 @@ resolver = "2"
 members = ["crates/*", "apps/gpclient", "apps/gpservice", "apps/gpauth"]
 
 [workspace.package]
-version = "2.0.0-beta4"
+version = "2.0.0-beta5"
 authors = ["Kevin Yue <k3vinyue@gmail.com>"]
 homepage = "https://github.com/yuezk/GlobalProtect-openconnect"
 edition = "2021"

README.md

@@ -11,6 +11,7 @@ A GUI for GlobalProtect VPN, based on OpenConnect, supports the SSO authenticati
 - [x] Better Linux support
 - [x] Support both CLI and GUI
 - [x] Support both SSO and non-SSO authentication
+- [x] Support authentication using default browser
 - [x] Support multiple portals
 - [x] Support gateway selection
 - [x] Support auto-connect on startup

apps/gpclient/src/launch_gui.rs

@@ -10,7 +10,12 @@ use log::info;
 
 #[derive(Args)]
 pub(crate) struct LaunchGuiArgs {
-  #[clap(long, help = "Launch the GUI minimized")]
+  #[arg(
+    required = false,
+    help = "The authentication data, used for the default browser authentication"
+  )]
+  auth_data: Option<String>,
+  #[arg(long, help = "Launch the GUI minimized")]
   minimized: bool,
 }
 
@@ -30,6 +35,12 @@ impl<'a> LaunchGuiHandler<'a> {
       anyhow::bail!("`launch-gui` cannot be run as root");
     }
 
+    let auth_data = self.args.auth_data.as_deref().unwrap_or_default();
+    if !auth_data.is_empty() {
+      // Process the authentication data, its format is `globalprotectcallback:<data>`
+      return feed_auth_data(auth_data).await;
+    }
+
     if try_active_gui().await.is_ok() {
       info!("The GUI is already running");
       return Ok(());
@@ -66,6 +77,19 @@ impl<'a> LaunchGuiHandler<'a> {
   }
 }
 
+async fn feed_auth_data(auth_data: &str) -> anyhow::Result<()> {
+  let service_endpoint = http_endpoint().await?;
+
+  reqwest::Client::default()
+    .post(format!("{}/auth-data", service_endpoint))
+    .json(&auth_data)
+    .send()
+    .await?
+    .error_for_status()?;
+
+  Ok(())
+}
+
 async fn try_active_gui() -> anyhow::Result<()> {
   let service_endpoint = http_endpoint().await?;
 

apps/gpservice/com.yuezk.gpservice.policy

@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE policyconfig PUBLIC "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN" "http://www.freedesktop.org/standards/PolicyKit/1/policyconfig.dtd">
-<policyconfig>
-  <vendor>GlobalProtect-openconnect</vendor>
-  <vendor_url>https://github.com/yuezk/GlobalProtect-openconnect</vendor_url>
-  <icon_name>gpgui</icon_name>
-  <action id="com.yuezk.gpservice">
-    <description>Run GPService as root</description>
-    <message>Authentication is required to run the GPService as root</message>
-    <defaults>
-      <allow_any>yes</allow_any>
-      <allow_inactive>yes</allow_inactive>
-      <allow_active>yes</allow_active>
-    </defaults>
-    <annotate key="org.freedesktop.policykit.exec.path">/home/kevin/Documents/repos/gp/target/debug/gpservice</annotate>
-    <annotate key="org.freedesktop.policykit.exec.argv1">--with-gui</annotate>
-    <annotate key="org.freedesktop.policykit.exec.allow_gui">true</annotate>
-  </action>
-</policyconfig>

apps/gpservice/src/handlers.rs

@@ -21,6 +21,13 @@ pub(crate) async fn active_gui(State(ctx): State<Arc<WsServerContext>>) -> impl
   ctx.send_event(WsEvent::ActiveGui).await;
 }
 
+pub(crate) async fn auth_data(
+  State(ctx): State<Arc<WsServerContext>>,
+  body: String,
+) -> impl IntoResponse {
+  ctx.send_event(WsEvent::AuthData(body)).await;
+}
+
 pub(crate) async fn ws_handler(
   ws: WebSocketUpgrade,
   State(ctx): State<Arc<WsServerContext>>,

apps/gpservice/src/routes.rs

@@ -8,6 +8,7 @@ pub(crate) fn routes(ctx: Arc<WsServerContext>) -> Router {
   Router::new()
     .route("/health", get(handlers::health))
     .route("/active-gui", post(handlers::active_gui))
+    .route("/auth-data", post(handlers::auth_data))
     .route("/ws", get(handlers::ws_handler))
     .with_state(ctx)
 }

crates/gpapi/Cargo.toml

@@ -28,7 +28,9 @@ uzers.workspace = true
 
 tauri = { workspace = true, optional = true }
 clap = { workspace = true, optional = true }
+open = { version = "5", optional = true }
 
 [features]
 tauri = ["dep:tauri"]
 clap = ["dep:clap"]
+browser-auth = ["dep:open"]

crates/gpapi/src/auth.rs

@@ -1,3 +1,5 @@
+use anyhow::bail;
+use regex::Regex;
 use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Serialize, Deserialize)]
@@ -37,6 +39,32 @@ impl SamlAuthData {
     }
   }
 
+  pub fn parse_html(html: &str) -> anyhow::Result<SamlAuthData> {
+    match parse_xml_tag(html, "saml-auth-status") {
+      Some(saml_status) if saml_status == "1" => {
+        let username = parse_xml_tag(html, "saml-username");
+        let prelogin_cookie = parse_xml_tag(html, "prelogin-cookie");
+        let portal_userauthcookie = parse_xml_tag(html, "portal-userauthcookie");
+
+        if SamlAuthData::check(&username, &prelogin_cookie, &portal_userauthcookie) {
+          return Ok(SamlAuthData::new(
+            username.unwrap(),
+            prelogin_cookie,
+            portal_userauthcookie,
+          ));
+        }
+
+        bail!("Found invalid auth data in HTML");
+      }
+      Some(status) => {
+        bail!("Found invalid SAML status {} in HTML", status);
+      }
+      None => {
+        bail!("No auth data found in HTML");
+      }
+    }
+  }
+
   pub fn username(&self) -> &str {
     &self.username
   }
@@ -61,3 +89,10 @@ impl SamlAuthData {
     username_valid && (prelogin_cookie_valid || portal_userauthcookie_valid)
   }
 }
+
+pub fn parse_xml_tag(html: &str, tag: &str) -> Option<String> {
+  let re = Regex::new(&format!("<{}>(.*)</{}>", tag, tag)).unwrap();
+  re.captures(html)
+    .and_then(|captures| captures.get(1))
+    .map(|m| m.as_str().to_string())
+}

crates/gpapi/src/credential.rs

@@ -3,7 +3,7 @@ use std::collections::HashMap;
 use serde::{Deserialize, Serialize};
 use specta::Type;
 
-use crate::auth::SamlAuthData;
+use crate::{auth::SamlAuthData, utils::base64::decode_to_string};
 
 #[derive(Debug, Serialize, Deserialize, Type, Clone)]
 #[serde(rename_all = "camelCase")]
@@ -151,6 +151,17 @@ pub enum Credential {
 }
 
 impl Credential {
+  /// Create a credential from a globalprotectcallback:<base64 encoded string>
+  pub fn parse_gpcallback(auth_data: &str) -> anyhow::Result<Self> {
+    // Remove the surrounding quotes
+    let auth_data = auth_data.trim_matches('"');
+    let auth_data = auth_data.trim_start_matches("globalprotectcallback:");
+    let auth_data = decode_to_string(auth_data)?;
+    let auth_data = SamlAuthData::parse_html(&auth_data)?;
+
+    Self::try_from(auth_data)
+  }
+
   pub fn username(&self) -> &str {
     match self {
       Credential::Password(cred) => cred.username(),

crates/gpapi/src/gp_params.rs

@@ -50,6 +50,7 @@ pub struct GpParams {
   client_version: Option<String>,
   computer: String,
   ignore_tls_errors: bool,
+  prefer_default_browser: bool,
 }
 
 impl GpParams {
@@ -69,6 +70,10 @@ impl GpParams {
     self.ignore_tls_errors
   }
 
+  pub fn prefer_default_browser(&self) -> bool {
+    self.prefer_default_browser
+  }
+
   pub(crate) fn to_params(&self) -> HashMap<&str, &str> {
     let mut params: HashMap<&str, &str> = HashMap::new();
     let client_os = self.client_os.as_str();
@@ -88,9 +93,10 @@ impl GpParams {
       params.insert("os-version", os_version);
     }
 
-    if let Some(client_version) = &self.client_version {
-      params.insert("clientgpversion", client_version);
-    }
+    // NOTE: Do not include clientgpversion for now
+    // if let Some(client_version) = &self.client_version {
+    //   params.insert("clientgpversion", client_version);
+    // }
 
     params
   }
@@ -103,6 +109,7 @@ pub struct GpParamsBuilder {
   client_version: Option<String>,
   computer: String,
   ignore_tls_errors: bool,
+  prefer_default_browser: bool,
 }
 
 impl GpParamsBuilder {
@@ -114,6 +121,7 @@ impl GpParamsBuilder {
       client_version: Default::default(),
       computer: whoami::hostname(),
       ignore_tls_errors: false,
+      prefer_default_browser: false,
     }
   }
 
@@ -147,6 +155,11 @@ impl GpParamsBuilder {
     self
   }
 
+  pub fn prefer_default_browser(&mut self, prefer_default_browser: bool) -> &mut Self {
+    self.prefer_default_browser = prefer_default_browser;
+    self
+  }
+
   pub fn build(&self) -> GpParams {
     GpParams {
       user_agent: self.user_agent.clone(),
@@ -155,6 +168,7 @@ impl GpParamsBuilder {
       client_version: self.client_version.clone(),
       computer: self.computer.clone(),
       ignore_tls_errors: self.ignore_tls_errors,
+      prefer_default_browser: self.prefer_default_browser,
     }
   }
 }

crates/gpapi/src/portal/prelogin.rs

@@ -26,6 +26,7 @@ const REQUIRED_PARAMS: [&str; 8] = [
 pub struct SamlPrelogin {
   region: String,
   saml_request: String,
+  support_default_browser: bool,
 }
 
 impl SamlPrelogin {
@@ -36,6 +37,10 @@ impl SamlPrelogin {
   pub fn saml_request(&self) -> &str {
     &self.saml_request
   }
+
+  pub fn support_default_browser(&self) -> bool {
+    self.support_default_browser
+  }
 }
 
 #[derive(Debug, Serialize, Type, Clone)]
@@ -86,14 +91,14 @@ pub async fn prelogin(portal: &str, gp_params: &GpParams) -> anyhow::Result<Prel
   info!("Portal prelogin, user_agent: {}", user_agent);
 
   let portal = normalize_server(portal)?;
-  let prelogin_url = format!(
-    "{}/global-protect/prelogin.esp?kerberos-support=yes",
-    portal
-  );
+  let prelogin_url = format!("{}/global-protect/prelogin.esp", portal);
   let mut params = gp_params.to_params();
+
   params.insert("tmp", "tmp");
-  params.insert("default-browser", "0");
   params.insert("cas-support", "yes");
+  if gp_params.prefer_default_browser() {
+    params.insert("default-browser", "1");
+  }
 
   params.retain(|k, _| {
     REQUIRED_PARAMS
@@ -125,12 +130,18 @@ pub async fn prelogin(portal: &str, gp_params: &GpParams) -> anyhow::Result<Prel
 
   let saml_method = xml::get_child_text(&doc, "saml-auth-method");
   let saml_request = xml::get_child_text(&doc, "saml-request");
+  let saml_default_browser = xml::get_child_text(&doc, "saml-default-browser");
   // Check if the prelogin response is SAML
   if saml_method.is_some() && saml_request.is_some() {
     let saml_request = base64::decode_to_string(&saml_request.unwrap())?;
+    let support_default_browser = saml_default_browser
+      .map(|s| s.to_lowercase() == "yes")
+      .unwrap_or(false);
+
     let saml_prelogin = SamlPrelogin {
       region,
       saml_request,
+      support_default_browser,
     };
 
     return Ok(Prelogin::Saml(saml_prelogin));

crates/gpapi/src/process/browser_authenticator.rs

@@ -0,0 +1,34 @@
+use std::{env::temp_dir, io::Write};
+
+pub struct BrowserAuthenticator<'a> {
+  auth_request: &'a str,
+}
+
+impl BrowserAuthenticator<'_> {
+  pub fn new(auth_request: &str) -> BrowserAuthenticator {
+    BrowserAuthenticator { auth_request }
+  }
+
+  pub fn authenticate(&self) -> anyhow::Result<()> {
+    if self.auth_request.starts_with("http") {
+      open::that_detached(self.auth_request)?;
+    } else {
+      let html_file = temp_dir().join("gpauth.html");
+      let mut file = std::fs::File::create(&html_file)?;
+
+      file.write_all(self.auth_request.as_bytes())?;
+
+      open::that_detached(html_file)?;
+    }
+
+    Ok(())
+  }
+}
+
+impl Drop for BrowserAuthenticator<'_> {
+  fn drop(&mut self) {
+    // Cleanup the temporary file
+    let html_file = temp_dir().join("gpauth.html");
+    let _ = std::fs::remove_file(html_file);
+  }
+}

crates/gpapi/src/process/mod.rs

@@ -1,5 +1,7 @@
 pub(crate) mod command_traits;
 
 pub mod auth_launcher;
+#[cfg(feature = "browser-auth")]
+pub mod browser_authenticator;
 pub mod gui_launcher;
 pub mod service_launcher;

crates/gpapi/src/service/event.rs

@@ -7,4 +7,6 @@ use super::vpn_state::VpnState;
 pub enum WsEvent {
   VpnState(VpnState),
   ActiveGui,
+  /// External authentication data
+  AuthData(String),
 }