bitbucket_cli/auth/
oauth.rs

1use anyhow::{Context, Result};
2use oauth2::basic::BasicClient;
3use oauth2::{
4    AuthUrl, AuthorizationCode, ClientId, ClientSecret, CsrfToken, PkceCodeChallenge, 
5    RedirectUrl, RefreshToken, Scope, TokenResponse, TokenUrl,
6};
7use std::io::{BufRead, BufReader, Write};
8use std::net::TcpListener;
9
10use super::{AuthManager, Credential};
11
12/// Async HTTP client for OAuth2 token exchange
13async fn async_http_client(
14    request: oauth2::HttpRequest,
15) -> Result<oauth2::HttpResponse, reqwest::Error> {
16    let client = reqwest::Client::builder()
17        .redirect(reqwest::redirect::Policy::none())
18        .build()?;
19
20    let mut request_builder = client
21        .request(request.method().clone(), request.uri().to_string())
22        .body(request.body().clone());
23
24    for (name, value) in request.headers() {
25        request_builder = request_builder.header(name.as_str(), value.as_bytes());
26    }
27
28    let response = request_builder.send().await?;
29
30    let status_code = response.status();
31    let headers = response.headers().to_owned();
32    let body = response.bytes().await?.to_vec();
33
34    let mut builder = oauth2::http::Response::builder()
35        .status(status_code);
36    
37    for (name, value) in headers.iter() {
38        builder = builder.header(name, value);
39    }
40    
41    // Build the response - this should never fail with valid HTTP data
42    Ok(builder.body(body).expect("Failed to build HTTP response"))
43}
44
45const BITBUCKET_AUTH_URL: &str = "https://bitbucket.org/site/oauth2/authorize";
46const BITBUCKET_TOKEN_URL: &str = "https://bitbucket.org/site/oauth2/access_token";
47
48/// OAuth 2.0 authentication flow
49pub struct OAuthFlow {
50    client_id: String,
51    client_secret: String,
52}
53
54impl OAuthFlow {
55    pub fn new(client_id: String, client_secret: String) -> Self {
56        Self {
57            client_id,
58            client_secret,
59        }
60    }
61
62    /// Try to bind to one of the preferred ports
63    fn bind_to_available_port(ports: &[u16]) -> Result<(TcpListener, u16)> {
64        for &port in ports {
65            match TcpListener::bind(format!("127.0.0.1:{}", port)) {
66                Ok(listener) => {
67                    return Ok((listener, port));
68                }
69                Err(_) => continue,
70            }
71        }
72        
73        anyhow::bail!(
74            "Could not bind to any preferred port. Tried: {:?}\n\n\
75            Please ensure at least one of these ports is available:\n\
76            - Close any applications using these ports\n\
77            - Or use API key authentication: bitbucket auth login --api-key",
78            ports
79        )
80    }
81
82    /// Run the OAuth 2.0 authentication flow
83    pub async fn authenticate(&self, auth_manager: &AuthManager) -> Result<Credential> {
84        println!("\n🔐 Bitbucket OAuth Authentication");
85        println!("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
86        println!();
87
88        // Use a static port for OAuth callback (required by Bitbucket)
89        // Try common ports in order: 8080, 3000, 8888, 9000
90        const PREFERRED_PORTS: &[u16] = &[8080, 3000, 8888, 9000];
91        
92        let (listener, port) = Self::bind_to_available_port(PREFERRED_PORTS)
93            .context("Failed to bind callback server. Please ensure one of these ports is available: 8080, 3000, 8888, or 9000")?;
94        
95        let redirect_url = format!("http://127.0.0.1:{}/callback", port);
96        
97        println!("📡 Callback server listening on port {}", port);
98        println!("   Make sure your OAuth consumer callback URL is set to:");
99        println!("   {}", redirect_url);
100        println!();
101
102        // Create OAuth client
103        let client = BasicClient::new(ClientId::new(self.client_id.clone()))
104            .set_client_secret(ClientSecret::new(self.client_secret.clone()))
105            .set_auth_uri(AuthUrl::new(BITBUCKET_AUTH_URL.to_string())?)
106            .set_token_uri(TokenUrl::new(BITBUCKET_TOKEN_URL.to_string())?)
107            .set_redirect_uri(RedirectUrl::new(redirect_url.clone())?);
108
109        // Generate PKCE challenge
110        let (pkce_challenge, pkce_verifier) = PkceCodeChallenge::new_random_sha256();
111
112        // Generate authorization URL
113        let (auth_url, csrf_token) = client
114            .authorize_url(|| CsrfToken::new_random())
115            .add_scope(Scope::new("repository".to_string()))
116            .add_scope(Scope::new("pullrequest".to_string()))
117            .add_scope(Scope::new("issue".to_string()))
118            .add_scope(Scope::new("pipeline".to_string()))
119            .add_scope(Scope::new("account".to_string()))
120            .set_pkce_challenge(pkce_challenge)
121            .url();
122
123        println!("Opening browser for authentication...");
124        println!();
125
126        // Try to open browser
127        if open::that(auth_url.as_str()).is_err() {
128            println!("Could not open browser automatically.");
129            println!("Please open this URL in your browser:");
130            println!();
131            println!("  {}", auth_url);
132            println!();
133        }
134
135        println!("Waiting for authorization...");
136
137        // Wait for callback
138        let code = Self::wait_for_callback(listener, csrf_token)?;
139
140        println!("Authorization received, exchanging for token...");
141
142        // Exchange code for token
143        let token_response = client
144            .exchange_code(code)
145            .set_pkce_verifier(pkce_verifier)
146            .request_async(&async_http_client)
147            .await
148            .context("Failed to exchange authorization code for token")?;
149
150        let access_token = token_response.access_token().secret().to_string();
151        let refresh_token = token_response
152            .refresh_token()
153            .map(|t| t.secret().to_string());
154        let expires_at = token_response
155            .expires_in()
156            .map(|d| chrono::Utc::now().timestamp() + d.as_secs() as i64);
157
158        let credential = Credential::OAuth {
159            access_token,
160            refresh_token,
161            expires_at,
162        };
163
164        // Store credentials
165        auth_manager.store_credentials(&credential)?;
166
167        println!("\n✅ Successfully authenticated via OAuth");
168
169        Ok(credential)
170    }
171
172    /// Wait for the OAuth callback and extract the authorization code
173    fn wait_for_callback(
174        listener: TcpListener,
175        expected_csrf: CsrfToken,
176    ) -> Result<AuthorizationCode> {
177        for stream in listener.incoming() {
178            let mut stream = match stream {
179                Ok(s) => s,
180                Err(_) => continue,
181            };
182
183            let mut reader = BufReader::new(&stream);
184            let mut request_line = String::new();
185            if reader.read_line(&mut request_line).is_err() {
186                continue;
187            }
188
189            // Parse the request URL
190            let Some(redirect_url) = request_line.split_whitespace().nth(1) else {
191                continue;
192            };
193
194            let Ok(url) = url::Url::parse(&format!("http://localhost{}", redirect_url)) else {
195                continue;
196            };
197
198            let mut code = None;
199            let mut state = None;
200
201            for (key, value) in url.query_pairs() {
202                match key.as_ref() {
203                    "code" => code = Some(AuthorizationCode::new(value.to_string())),
204                    "state" => state = Some(CsrfToken::new(value.to_string())),
205                    _ => {}
206                }
207            }
208
209            // Verify CSRF token
210            if let Some(ref state) = state {
211                if state.secret() != expected_csrf.secret() {
212                    let response = "HTTP/1.1 400 Bad Request\r\n\r\nCSRF token mismatch";
213                    let _ = stream.write_all(response.as_bytes());
214                    continue;
215                }
216            }
217
218            // Send success response
219            let response = r#"HTTP/1.1 200 OK
220Content-Type: text/html
221
222<!DOCTYPE html>
223<html>
224<head><title>Bitbucket CLI</title></head>
225<body style="font-family: system-ui; text-align: center; padding: 50px;">
226<h1>✅ Authentication Successful</h1>
227<p>You can close this window and return to the terminal.</p>
228</body>
229</html>"#;
230            let _ = stream.write_all(response.as_bytes());
231
232            if let Some(code) = code {
233                return Ok(code);
234            }
235        }
236
237        anyhow::bail!("Callback server closed unexpectedly")
238    }
239
240    /// Refresh an expired OAuth token
241    pub async fn refresh_token(
242        &self,
243        auth_manager: &AuthManager,
244        refresh_token: &str,
245    ) -> Result<Credential> {
246        let client = BasicClient::new(ClientId::new(self.client_id.clone()))
247            .set_client_secret(ClientSecret::new(self.client_secret.clone()))
248            .set_auth_uri(AuthUrl::new(BITBUCKET_AUTH_URL.to_string())?)
249            .set_token_uri(TokenUrl::new(BITBUCKET_TOKEN_URL.to_string())?);
250
251
252        let token_response = client
253            .exchange_refresh_token(&RefreshToken::new(refresh_token.to_string()))
254            .request_async(&async_http_client)
255            .await
256            .context("Failed to refresh token")?;
257
258        let access_token = token_response.access_token().secret().to_string();
259        let new_refresh_token = token_response
260            .refresh_token()
261            .map(|t| t.secret().to_string())
262            .unwrap_or_else(|| refresh_token.to_string());
263        let expires_at = token_response
264            .expires_in()
265            .map(|d| chrono::Utc::now().timestamp() + d.as_secs() as i64);
266
267        let credential = Credential::OAuth {
268            access_token,
269            refresh_token: Some(new_refresh_token),
270            expires_at,
271        };
272
273        auth_manager.store_credentials(&credential)?;
274
275        Ok(credential)
276    }
277}
bitbucket_cli/auth/oauth.rs

bitbucket_cli/auth/
oauth.rs
