auth_framework/api/
oauth_simple.rs

1//! OAuth 2.0 Advanced Features API Endpoints
2//!
3//! This module implements basic OAuth 2.0 advanced features:
4//! - RFC 7662: Token Introspection (basic implementation)
5//! - RFC 9126: Pushed Authorization Requests (basic implementation)
6
7use crate::api::{ApiResponse, ApiState};
8use axum::{
9    extract::State,
10    Form,
11};
12use serde::{Deserialize, Serialize};
13
14// Simple Request/Response Types
15
16#[derive(Debug, Deserialize)]
17pub struct TokenIntrospectForm {
18    pub token: String,
19}
20
21#[derive(Debug, Serialize)]
22pub struct TokenIntrospectResponse {
23    pub active: bool,
24    #[serde(skip_serializing_if = "Option::is_none")]
25    pub client_id: Option<String>,
26    #[serde(skip_serializing_if = "Option::is_none")]
27    pub username: Option<String>,
28    #[serde(skip_serializing_if = "Option::is_none")]
29    pub scope: Option<String>,
30    #[serde(skip_serializing_if = "Option::is_none")]
31    pub token_type: Option<String>,
32    #[serde(skip_serializing_if = "Option::is_none")]
33    pub exp: Option<i64>,
34    #[serde(skip_serializing_if = "Option::is_none")]
35    pub iat: Option<i64>,
36    #[serde(skip_serializing_if = "Option::is_none")]
37    pub sub: Option<String>,
38}
39
40#[derive(Debug, Deserialize)]
41pub struct PARForm {
42    pub client_id: String,
43    pub response_type: Option<String>,
44    pub redirect_uri: Option<String>,
45    pub scope: Option<String>,
46    pub state: Option<String>,
47}
48
49#[derive(Debug, Serialize)]
50pub struct PARResponse {
51    pub request_uri: String,
52    pub expires_in: u64,
53}
54
55#[derive(Debug, Deserialize)]
56pub struct DeviceAuthForm {
57    pub client_id: String,
58    pub scope: Option<String>,
59}
60
61#[derive(Debug, Serialize)]
62pub struct DeviceAuthResponse {
63    pub device_code: String,
64    pub user_code: String,
65    pub verification_uri: String,
66    pub verification_uri_complete: Option<String>,
67    pub expires_in: u64,
68    pub interval: Option<u64>,
69}
70
71// API Endpoints
72
73/// POST /api/v1/oauth/introspect
74/// Token introspection endpoint (RFC 7662)
75pub async fn introspect_token(
76    State(_state): State<ApiState>,
77    Form(_form): Form<TokenIntrospectForm>,
78) -> ApiResponse<TokenIntrospectResponse> {
79    // For now, return inactive for all tokens - in a real implementation
80    // this would validate against the token store
81    let response = TokenIntrospectResponse {
82        active: false, // TODO: Implement actual token validation
83        client_id: None,
84        username: None,
85        scope: None,
86        token_type: None,
87        exp: None,
88        iat: None,
89        sub: None,
90    };
91    ApiResponse::success(response)
92}
93
94/// POST /api/v1/oauth/par
95/// Pushed Authorization Request endpoint (RFC 9126)
96pub async fn pushed_authorization_request(
97    State(_state): State<ApiState>,
98    Form(_form): Form<PARForm>,
99) -> ApiResponse<PARResponse> {
100    // Generate a request URI (simplified implementation)
101    let request_uri = format!("urn:ietf:params:oauth:request_uri:{}", uuid::Uuid::new_v4());
102    
103    // In a real implementation, we would store the request parameters
104    // associated with this request_uri for later retrieval
105    
106    let response = PARResponse {
107        request_uri,
108        expires_in: 60, // 1 minute expiration
109    };
110
111    ApiResponse::success(response)
112}
113
114/// POST /api/v1/oauth/device_authorization  
115/// Device authorization endpoint (RFC 8628)
116pub async fn device_authorization(
117    State(_state): State<ApiState>,
118    Form(_form): Form<DeviceAuthForm>,
119) -> ApiResponse<DeviceAuthResponse> {
120    // Generate device code and user code
121    let device_code = format!("dc_{}", generate_random_string(32));
122    let user_code = generate_user_friendly_code();
123    
124    let verification_uri = "http://localhost:8080/device".to_string();
125    let verification_uri_complete = format!("{}?user_code={}", verification_uri, user_code);
126
127    // In a real implementation, we would store the device authorization
128    // data for polling and user authorization
129    
130    let response = DeviceAuthResponse {
131        device_code,
132        user_code,
133        verification_uri,
134        verification_uri_complete: Some(verification_uri_complete),
135        expires_in: 600, // 10 minutes
136        interval: Some(5), // Poll every 5 seconds
137    };
138
139    ApiResponse::success(response)
140}
141
142// Helper Functions
143
144fn generate_random_string(length: usize) -> String {
145    use rand::Rng;
146    const CHARS: &[u8] = b"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
147    let mut rng = rand::rng();
148    (0..length)
149        .map(|_| {
150            let idx = rng.random_range(0..CHARS.len());
151            CHARS[idx] as char
152        })
153        .collect()
154}
155
156fn generate_user_friendly_code() -> String {
157    use rand::Rng;
158    const CHARS: &[u8] = b"ABCDEFGHJKLMNPQRSTUVWXYZ23456789"; // No ambiguous chars
159    let mut rng = rand::rng();
160    (0..8)
161        .map(|_| {
162            let idx = rng.random_range(0..CHARS.len());
163            CHARS[idx] as char
164        })
165        .collect()
166}
auth_framework/api/oauth_simple.rs

auth_framework/api/
oauth_simple.rs
