provide issuer URL, client ID and local web port to constructor

also construct the oidc client

zeroidc/Cargo.lock

@@ -1325,6 +1325,8 @@ dependencies = [
 name = "zeroidc"
 version = "0.1.0"
 dependencies = [
+ "base64 0.13.0",
  "cbindgen",
  "openidconnect",
+ "url",
 ]

zeroidc/Cargo.toml

@@ -12,6 +12,8 @@ crate-type = ["staticlib"]
 
 [dependencies]
 openidconnect = "2.1.0"
+base64 = "0.13.0"
+url = "2.2.2"
 
 [build-dependencies]
 cbindgen = "0.20.0"

zeroidc/src/lib.rs

@@ -1,7 +1,20 @@
+extern crate base64;
+extern crate openidconnect;
+extern crate url;
+
 use std::sync::{Arc, Mutex};
 use std::thread::{sleep, spawn, JoinHandle};
 use std::time::Duration;
 
+use openidconnect::core::{CoreClient, CoreProviderMetadata};
+use openidconnect::reqwest::http_client;
+use openidconnect::{ClientId, IssuerUrl, RedirectUrl};
+
+use url::Url;
+
+use std::ffi::CStr;
+use std::os::raw::c_char;
+
 pub struct ZeroIDC {
     inner: Arc<Mutex<Inner>>,
 }
@@ -9,16 +22,50 @@ pub struct ZeroIDC {
 struct Inner {
     running: bool,
     oidc_thread: Option<JoinHandle<()>>,
+    oidc_client: Option<openidconnect::core::CoreClient>,
 }
 
 impl ZeroIDC {
-    fn new() -> ZeroIDC {
-        ZeroIDC {
+    fn new(issuer: &str, client_id: &str, port: u16) -> Result<ZeroIDC, String> {
+        let idc = ZeroIDC {
             inner: Arc::new(Mutex::new(Inner {
                 running: false,
                 oidc_thread: None,
+                oidc_client: None,
             })),
-        }
+        };
+
+        let iss = match IssuerUrl::new(issuer.to_string()) {
+            Ok(i) => i,
+            Err(e) => return Err(e.to_string()),
+        };
+
+        let provider_meta = match CoreProviderMetadata::discover(&iss, http_client) {
+            Ok(m) => m,
+            Err(e) => return Err(e.to_string()),
+        };
+
+        let r = format!("http://localhost:{}", port);
+        let redir_url = match Url::parse(&r) {
+            Ok(s) => s,
+            Err(e) => return Err(e.to_string()),
+        };
+
+        let redirect = match RedirectUrl::new(redir_url.to_string()) {
+            Ok(s) => s,
+            Err(e) => return Err(e.to_string()),
+        };
+
+        (*idc.inner.lock().unwrap()).oidc_client = Some(
+            CoreClient::from_provider_metadata(
+                provider_meta,
+                ClientId::new(client_id.to_string()),
+                None,
+            )
+            .set_redirect_uri(redirect),
+        );
+
+        Ok(idc)
     }
 
     fn start(&mut self) {
@@ -50,19 +97,59 @@ impl ZeroIDC {
 }
 
 #[no_mangle]
-pub extern "C" fn zeroidc_new() -> Box<ZeroIDC> {
-    Box::new(ZeroIDC::new())
+pub extern "C" fn zeroidc_new(
+    issuer: *const c_char,
+    client_id: *const c_char,
+    web_port: u16,
+) -> *mut ZeroIDC {
+    if issuer.is_null() {
+        println!("issuer is null");
+        return std::ptr::null_mut();
+    }
+
+    if client_id.is_null() {
+        println!("client_id is null");
+        return std::ptr::null_mut();
+    }
+
+    let iss = unsafe { CStr::from_ptr(issuer) };
+    let c_id = unsafe { CStr::from_ptr(client_id) };
+
+    match ZeroIDC::new(iss.to_str().unwrap(), c_id.to_str().unwrap(), web_port) {
+        Ok(idc) => {
+            return Box::into_raw(Box::new(idc));
+        }
+        Err(s) => {
+            println!("Error creating ZeroIDC instance: {}", s);
+            return std::ptr::null_mut();
+        }
+    }
 }
 
 #[no_mangle]
-pub extern "C" fn zeroidc_delete(_: Option<Box<ZeroIDC>>) {}
+pub extern "C" fn zeroidc_delete(ptr: *mut ZeroIDC) {
+    if ptr.is_null() {
+        return;
+    }
+    unsafe {
+        Box::from_raw(ptr);
+    }
+}
 
 #[no_mangle]
-pub extern "C" fn zeroidc_start(idc: &'static mut ZeroIDC) {
+pub extern "C" fn zeroidc_start(ptr: *mut ZeroIDC) {
+    let idc = unsafe {
+        assert!(!ptr.is_null());
+        &mut *ptr
+    };
     idc.start();
 }
 
 #[no_mangle]
-pub extern "C" fn zeroidc_stop(idc: &'static mut ZeroIDC) {
+pub extern "C" fn zeroidc_stop(ptr: *mut ZeroIDC) {
+    let idc = unsafe {
+        assert!(!ptr.is_null());
+        &mut *ptr
+    };
     idc.stop();
 }