RPM build fix (reverted CI changes which will need to be un-reverted or made conditional) and vendor Rust dependencies to make builds much faster in any CI system.

zeroidc/vendor/openidconnect/examples/gitlab.rs

@@ -0,0 +1,198 @@
+//!
+//! This example showcases the process of integrating with the
+//! [GitLab OpenID Connect](https://docs.gitlab.com/ee/integration/openid_connect_provider.html)
+//! provider.
+//!
+//! Before running it, you'll need to generate your own
+//! [GitLab Application](https://docs.gitlab.com/ee/integration/oauth_provider.html).
+//! The application needs `openid`, `profile` and `email` permission.
+//!
+//! In order to run the example call:
+//!
+//! ```sh
+//! GITLAB_CLIENT_ID=xxx GITLAB_CLIENT_SECRET=yyy cargo run --example gitlab
+//! ```
+//!
+//! ...and follow the instructions.
+//!
+
+use std::env;
+use std::io::{BufRead, BufReader, Write};
+use std::net::TcpListener;
+use std::process::exit;
+
+use url::Url;
+
+use openidconnect::core::{
+    CoreClient, CoreGenderClaim, CoreIdTokenClaims, CoreIdTokenVerifier, CoreProviderMetadata,
+    CoreResponseType,
+};
+
+use openidconnect::reqwest::http_client;
+use openidconnect::{AdditionalClaims, UserInfoClaims};
+use openidconnect::{
+    AuthenticationFlow, AuthorizationCode, ClientId, ClientSecret, CsrfToken, IssuerUrl, Nonce,
+    OAuth2TokenResponse, RedirectUrl, Scope,
+};
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Deserialize, Serialize)]
+struct GitLabClaims {
+    // Deprecated and thus optional as it might be removed in the futre
+    sub_legacy: Option<String>,
+    groups: Vec<String>,
+}
+impl AdditionalClaims for GitLabClaims {}
+
+fn handle_error<T: std::error::Error>(fail: &T, msg: &'static str) {
+    let mut err_msg = format!("ERROR: {}", msg);
+    let mut cur_fail: Option<&dyn std::error::Error> = Some(fail);
+    while let Some(cause) = cur_fail {
+        err_msg += &format!("\n    caused by: {}", cause);
+        cur_fail = cause.source();
+    }
+    println!("{}", err_msg);
+    exit(1);
+}
+
+fn main() {
+    env_logger::init();
+
+    let gitlab_client_id = ClientId::new(
+        env::var("GITLAB_CLIENT_ID").expect("Missing the GITLAB_CLIENT_ID environment variable."),
+    );
+    let gitlab_client_secret = ClientSecret::new(
+        env::var("GITLAB_CLIENT_SECRET")
+            .expect("Missing the GITLAB_CLIENT_SECRET environment variable."),
+    );
+    let issuer_url = IssuerUrl::new("https://gitlab.com".to_string()).expect("Invalid issuer URL");
+
+    // Fetch GitLab's OpenID Connect discovery document.
+    //
+    let provider_metadata = CoreProviderMetadata::discover(&issuer_url, http_client)
+        .unwrap_or_else(|err| {
+            handle_error(&err, "Failed to discover OpenID Provider");
+            unreachable!();
+        });
+
+    // Set up the config for the GitLab OAuth2 process.
+    let client = CoreClient::from_provider_metadata(
+        provider_metadata,
+        gitlab_client_id,
+        Some(gitlab_client_secret),
+    )
+    // This example will be running its own server at localhost:8080.
+    // See below for the server implementation.
+    .set_redirect_uri(
+        RedirectUrl::new("http://localhost:8080".to_string()).expect("Invalid redirect URL"),
+    );
+
+    // Generate the authorization URL to which we'll redirect the user.
+    let (authorize_url, csrf_state, nonce) = client
+        .authorize_url(
+            AuthenticationFlow::<CoreResponseType>::AuthorizationCode,
+            CsrfToken::new_random,
+            Nonce::new_random,
+        )
+        // This example is requesting access to the the user's profile including email.
+        .add_scope(Scope::new("email".to_string()))
+        .add_scope(Scope::new("profile".to_string()))
+        .url();
+
+    println!("Open this URL in your browser:\n{}\n", authorize_url);
+
+    // A very naive implementation of the redirect server.
+    let listener = TcpListener::bind("127.0.0.1:8080").unwrap();
+
+    // Accept one connection
+    let (mut stream, _) = listener.accept().unwrap();
+    let code;
+    let state;
+    {
+        let mut reader = BufReader::new(&stream);
+
+        let mut request_line = String::new();
+        reader.read_line(&mut request_line).unwrap();
+
+        let redirect_url = request_line.split_whitespace().nth(1).unwrap();
+        let url = Url::parse(&("http://localhost".to_string() + redirect_url)).unwrap();
+
+        let code_pair = url
+            .query_pairs()
+            .find(|pair| {
+                let &(ref key, _) = pair;
+                key == "code"
+            })
+            .unwrap();
+
+        let (_, value) = code_pair;
+        code = AuthorizationCode::new(value.into_owned());
+
+        let state_pair = url
+            .query_pairs()
+            .find(|pair| {
+                let &(ref key, _) = pair;
+                key == "state"
+            })
+            .unwrap();
+
+        let (_, value) = state_pair;
+        state = CsrfToken::new(value.into_owned());
+    }
+
+    let message = "Go back to your terminal :)";
+    let response = format!(
+        "HTTP/1.1 200 OK\r\ncontent-length: {}\r\n\r\n{}",
+        message.len(),
+        message
+    );
+    stream.write_all(response.as_bytes()).unwrap();
+
+    println!("GitLab returned the following code:\n{}\n", code.secret());
+    println!(
+        "GitLab returned the following state:\n{} (expected `{}`)\n",
+        state.secret(),
+        csrf_state.secret()
+    );
+
+    // Exchange the code with a token.
+    let token_response = client
+        .exchange_code(code)
+        .request(http_client)
+        .unwrap_or_else(|err| {
+            handle_error(&err, "Failed to contact token endpoint");
+            unreachable!();
+        });
+
+    println!(
+        "GitLab returned access token:\n{}\n",
+        token_response.access_token().secret()
+    );
+    println!("GitLab returned scopes: {:?}", token_response.scopes());
+
+    let id_token_verifier: CoreIdTokenVerifier = client.id_token_verifier();
+    let id_token_claims: &CoreIdTokenClaims = token_response
+        .extra_fields()
+        .id_token()
+        .expect("Server did not return an ID token")
+        .claims(&id_token_verifier, &nonce)
+        .unwrap_or_else(|err| {
+            handle_error(&err, "Failed to verify ID token");
+            unreachable!();
+        });
+    println!("GitLab returned ID token: {:?}\n", id_token_claims);
+
+    let userinfo_claims: UserInfoClaims<GitLabClaims, CoreGenderClaim> = client
+        .user_info(token_response.access_token().to_owned(), None)
+        .unwrap_or_else(|err| {
+            handle_error(&err, "No user info endpoint");
+            unreachable!();
+        })
+        .request(http_client)
+        .unwrap_or_else(|err| {
+            handle_error(&err, "Failed requesting user info");
+            unreachable!();
+        });
+    println!("GitLab returned UserInfo: {:?}", userinfo_claims);
+}