Fix ignore TLS errors

.vscode/settings.json

@@ -11,8 +11,10 @@
         "dotenvy",
         "getconfig",
         "globalprotect",
+        "globalprotectcallback",
         "gpapi",
         "gpauth",
+        "gpcallback",
         "gpclient",
         "gpcommon",
         "gpgui",
@@ -48,6 +50,8 @@
         "vpnc",
         "vpninfo",
         "wmctrl",
-        "XAUTHORITY"
-    ]
+        "XAUTHORITY",
+        "yuezk"
+    ],
+    "rust-analyzer.cargo.features": "all",
 }

Cargo.lock

@@ -1423,7 +1423,7 @@ dependencies = [
 
 [[package]]
 name = "gpapi"
-version = "2.0.0-beta2"
+version = "2.0.0-beta6"
 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-beta2"
+version = "2.0.0-beta6"
 dependencies = [
  "anyhow",
  "clap",
@@ -1471,7 +1472,7 @@ dependencies = [
 
 [[package]]
 name = "gpclient"
-version = "2.0.0-beta2"
+version = "2.0.0-beta6"
 dependencies = [
  "anyhow",
  "clap",
@@ -1492,7 +1493,7 @@ dependencies = [
 
 [[package]]
 name = "gpservice"
-version = "2.0.0-beta2"
+version = "2.0.0-beta6"
 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-beta2"
+version = "2.0.0-beta6"
 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-beta2"
+version = "2.0.0-beta6"
 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
@@ -54,6 +55,11 @@ The GUI version is also available after you installed it. You can launch it from
 >
 > This instruction is for the 2.x version. The 1.x version is still available on the [1.x](https://github.com/yuezk/GlobalProtect-openconnect/tree/1.x) branch, you can build it from the source code by following the instructions in the `README.md` file.
 
+> [!Warning]
+>
+> The client requires `openconnect >= 8.20`, please make sure you have it installed, you can check it with `openconnect --version`.
+> Installing the client from PPA will automatically install the required version of `openconnect`.
+
 ### Debian/Ubuntu based distributions
 
 #### Install from PPA
@@ -82,6 +88,10 @@ sudo dpkg -i globalprotect-openconnect_*.deb
 
 Install from AUR: [globalprotect-openconnect-git](https://aur.archlinux.org/packages/globalprotect-openconnect-git/)
 
+```
+yay -S globalprotect-openconnect-git
+```
+
 #### Install from package
 
 Download the latest package from [releases](https://github.com/yuezk/GlobalProtect-openconnect/releases) page. Then install it with `pacman`:
@@ -111,7 +121,7 @@ Download the latest RPM package from [releases](https://github.com/yuezk/GlobalP
 
 ### Other distributions
 
-The project depends on `openconnect`, `webkit2gtk`, `libsecret`, `libayatana-appindicator` or `libappindicator-gtk3`. You can install them first and then download the latest binary release (i.e., `*.bin.tar.gz`) from [releases](https://github.com/yuezk/GlobalProtect-openconnect/releases) page.
+The project depends on `openconnect >= 8.20`, `webkit2gtk`, `libsecret`, `libayatana-appindicator` or `libappindicator-gtk3`. You can install them first and then download the latest binary release (i.e., `*.bin.tar.gz`) from [releases](https://github.com/yuezk/GlobalProtect-openconnect/releases) page.
 
 ## [License](./LICENSE)
 

apps/gpauth/src/auth_window.rs

@@ -203,7 +203,8 @@ impl<'a> AuthWindow<'a> {
       wv.connect_load_failed(move |_wv, _event, uri, err| {
         let redacted_uri = redact_uri(uri);
         warn!("Failed to load uri: {} with error: {}", redacted_uri, err);
-        send_auth_result(&auth_result_tx, Err(AuthDataError::Invalid));
+        // NOTE: Don't send error here, since load_changed event will be triggered after this
+        // send_auth_result(&auth_result_tx, Err(AuthDataError::Invalid));
         // true to stop other handlers from being invoked for the event. false to propagate the event further.
         true
       });

apps/gpclient/src/cli.rs

@@ -115,7 +115,7 @@ pub(crate) async fn run() {
       eprintln!("{} --fix-openssl {}\n", args[0], args[1..].join(" "));
     }
 
-    if err.contains("certificate verify failed") {
+    if err.contains("certificate verify failed") && !cli.ignore_tls_errors {
       eprintln!(
         "\nRe-run it with the `--ignore-tls-errors` option to ignore the certificate error, e.g.:\n"
       );

apps/gpclient/src/connect.rs

@@ -47,6 +47,20 @@ pub(crate) struct ConnectArgs {
   clean: bool,
 }
 
+impl ConnectArgs {
+  fn os_version(&self) -> String {
+    if let Some(os_version) = &self.os_version {
+      return os_version.to_owned();
+    }
+
+    match self.os {
+      Os::Linux => format!("Linux {}", whoami::distro()),
+      Os::Windows => String::from("Microsoft Windows 11 Pro , 64-bit"),
+      Os::Mac => String::from("Apple Mac OS X 13.4.0"),
+    }
+  }
+}
+
 pub(crate) struct ConnectHandler<'a> {
   args: &'a ConnectArgs,
   shared_args: &'a SharedArgs,
@@ -63,7 +77,7 @@ impl<'a> ConnectHandler<'a> {
     let gp_params = GpParams::builder()
       .user_agent(&self.args.user_agent)
       .client_os(ClientOs::from(&self.args.os))
-      .os_version(self.args.os_version.clone())
+      .os_version(self.args.os_version())
       .ignore_tls_errors(self.shared_args.ignore_tls_errors)
       .build();
 
@@ -125,7 +139,7 @@ impl<'a> ConnectHandler<'a> {
           .saml_request(prelogin.saml_request())
           .user_agent(&self.args.user_agent)
           .os(self.args.os.as_str())
-          .os_version(self.args.os_version.as_deref())
+          .os_version(Some(&self.args.os_version()))
           .hidpi(self.args.hidpi)
           .fix_openssl(self.shared_args.fix_openssl)
           .ignore_tls_errors(self.shared_args.ignore_tls_errors)

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(),
@@ -164,31 +175,34 @@ impl Credential {
     let mut params = HashMap::new();
     params.insert("user", self.username());
 
-    match self {
-      Credential::Password(cred) => {
-        params.insert("passwd", cred.password());
-      }
-      Credential::PreloginCookie(cred) => {
-        params.insert("prelogin-cookie", cred.prelogin_cookie());
-      }
-      Credential::AuthCookie(cred) => {
-        params.insert("portal-userauthcookie", cred.user_auth_cookie());
+    let (passwd, prelogin_cookie, portal_userauthcookie, portal_prelogonuserauthcookie) = match self
+    {
+      Credential::Password(cred) => (Some(cred.password()), None, None, None),
+      Credential::PreloginCookie(cred) => (None, Some(cred.prelogin_cookie()), None, None),
+      Credential::AuthCookie(cred) => (
+        None,
+        None,
+        Some(cred.user_auth_cookie()),
+        Some(cred.prelogon_user_auth_cookie()),
+      ),
+      Credential::CachedCredential(cred) => (
+        cred.password(),
+        None,
+        Some(cred.auth_cookie.user_auth_cookie()),
+        Some(cred.auth_cookie.prelogon_user_auth_cookie()),
+      ),
+    };
+
+    params.insert("passwd", passwd.unwrap_or_default());
+    params.insert("prelogin-cookie", prelogin_cookie.unwrap_or_default());
+    params.insert(
+      "portal-userauthcookie",
+      portal_userauthcookie.unwrap_or_default(),
+    );
     params.insert(
       "portal-prelogonuserauthcookie",
-          cred.prelogon_user_auth_cookie(),
+      portal_prelogonuserauthcookie.unwrap_or_default(),
     );
-      }
-      Credential::CachedCredential(cred) => {
-        if let Some(password) = cred.password() {
-          params.insert("passwd", password);
-        }
-        params.insert("portal-userauthcookie", cred.auth_cookie.user_auth_cookie());
-        params.insert(
-          "portal-prelogonuserauthcookie",
-          cred.auth_cookie.prelogon_user_auth_cookie(),
-        );
-      }
-    }
 
     params
   }

crates/gpapi/src/gateway/login.rs

@@ -12,6 +12,7 @@ pub async fn gateway_login(
 ) -> anyhow::Result<String> {
   let login_url = format!("https://{}/ssl-vpn/login.esp", gateway);
   let client = Client::builder()
+    .danger_accept_invalid_certs(gp_params.ignore_tls_errors())
     .user_agent(gp_params.user_agent())
     .build()?;
 
@@ -23,14 +24,8 @@ pub async fn gateway_login(
 
   info!("Gateway login, user_agent: {}", gp_params.user_agent());
 
-  let res_xml = client
-    .post(&login_url)
-    .form(&params)
-    .send()
-    .await?
-    .error_for_status()?
-    .text()
-    .await?;
+  let res = client.post(&login_url).form(&params).send().await?;
+  let res_xml = res.error_for_status()?.text().await?;
 
   let doc = Document::parse(&res_xml)?;
 

crates/gpapi/src/gp_params.rs

@@ -48,8 +48,9 @@ pub struct GpParams {
   client_os: ClientOs,
   os_version: Option<String>,
   client_version: Option<String>,
-  computer: Option<String>,
+  computer: String,
   ignore_tls_errors: bool,
+  prefer_default_browser: bool,
 }
 
 impl GpParams {
@@ -62,16 +63,17 @@ impl GpParams {
   }
 
   pub(crate) fn computer(&self) -> &str {
-    match self.computer {
-      Some(ref computer) => computer,
-      None => self.client_os.as_str(),
-    }
+    &self.computer
   }
 
   pub fn ignore_tls_errors(&self) -> bool {
     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();
@@ -84,22 +86,17 @@ impl GpParams {
     params.insert("ipv6-support", "yes");
     params.insert("inputStr", "");
     params.insert("clientVer", "4100");
-
     params.insert("clientos", client_os);
-
-    if let Some(computer) = &self.computer {
-      params.insert("computer", computer);
-    } else {
-      params.insert("computer", client_os);
-    }
+    params.insert("computer", &self.computer);
 
     if let Some(os_version) = &self.os_version {
       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
   }
@@ -110,8 +107,9 @@ pub struct GpParamsBuilder {
   client_os: ClientOs,
   os_version: Option<String>,
   client_version: Option<String>,
-  computer: Option<String>,
+  computer: String,
   ignore_tls_errors: bool,
+  prefer_default_browser: bool,
 }
 
 impl GpParamsBuilder {
@@ -121,8 +119,9 @@ impl GpParamsBuilder {
       client_os: ClientOs::Linux,
       os_version: Default::default(),
       client_version: Default::default(),
-      computer: Default::default(),
+      computer: whoami::hostname(),
       ignore_tls_errors: false,
+      prefer_default_browser: false,
     }
   }
 
@@ -147,7 +146,7 @@ impl GpParamsBuilder {
   }
 
   pub fn computer(&mut self, computer: &str) -> &mut Self {
-    self.computer = Some(computer.to_string());
+    self.computer = computer.to_string();
     self
   }
 
@@ -156,6 +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(),
@@ -164,6 +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/config.rs

@@ -120,6 +120,7 @@ pub async fn retrieve_config(
 
   let url = format!("{}/global-protect/getconfig.esp", portal);
   let client = Client::builder()
+    .danger_accept_invalid_certs(gp_params.ignore_tls_errors())
     .user_agent(gp_params.user_agent())
     .build()?;
 
@@ -132,14 +133,8 @@ pub async fn retrieve_config(
 
   info!("Portal config, user_agent: {}", gp_params.user_agent());
 
-  let res_xml = client
-    .post(&url)
-    .form(&params)
-    .send()
-    .await?
-    .error_for_status()?
-    .text()
-    .await?;
+  let res = client.post(&url).form(&params).send().await?;
+  let res_xml = res.error_for_status()?.text().await?;
 
   ensure!(!res_xml.is_empty(), PortalConfigError::EmptyResponse);
 

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),
 }