auth_framework/api/
webauthn.rs

1use crate::api::{ApiResponse, ApiState};
2use axum::{extract::State, response::Json};
3use base64::Engine;
4use rand::RngCore;
5use serde::{Deserialize, Serialize};
6
7/// Request to initiate WebAuthn registration
8#[derive(Debug, Serialize, Deserialize)]
9pub struct WebAuthnRegistrationInitRequest {
10    pub username: String,
11    pub display_name: Option<String>,
12    pub authenticator_attachment: Option<String>, // "platform" or "cross-platform"
13    pub user_verification: Option<String>,        // "required", "preferred", "discouraged"
14}
15
16/// WebAuthn registration challenge response
17#[derive(Debug, Serialize, Deserialize)]
18pub struct WebAuthnRegistrationResponse {
19    pub challenge: String,
20    pub rp: PublicKeyCredentialRpEntity,
21    pub user: PublicKeyCredentialUserEntity,
22    pub pubkey_cred_params: Vec<PublicKeyCredentialParameters>,
23    pub timeout: Option<u64>,
24    #[serde(rename = "excludeCredentials")]
25    pub exclude_credentials: Option<Vec<PublicKeyCredentialDescriptor>>,
26    #[serde(rename = "authenticatorSelection")]
27    pub authenticator_selection: Option<AuthenticatorSelectionCriteria>,
28    pub attestation: String,
29    pub session_id: String,
30}
31
32/// Complete WebAuthn registration
33#[derive(Debug, Serialize, Deserialize)]
34pub struct WebAuthnRegistrationCompleteRequest {
35    pub session_id: String,
36    pub credential_id: String,
37    pub credential_public_key: String,
38    pub attestation_object: String,
39    pub client_data_json: String,
40    pub authenticator_data: String,
41    pub signature: String,
42}
43
44/// WebAuthn authentication initiation request
45#[derive(Debug, Serialize, Deserialize)]
46pub struct WebAuthnAuthenticationRequest {
47    pub username: Option<String>,
48    pub user_verification: Option<String>,
49}
50
51/// WebAuthn authentication challenge response
52#[derive(Debug, Serialize, Deserialize)]
53pub struct WebAuthnAuthenticationResponse {
54    pub challenge: String,
55    pub allow_credentials: Vec<PublicKeyCredentialDescriptor>,
56    pub timeout: Option<u64>,
57    pub user_verification: String,
58    pub session_id: String,
59}
60
61/// Complete WebAuthn authentication
62#[derive(Debug, Serialize, Deserialize)]
63pub struct WebAuthnAuthenticationCompleteRequest {
64    pub session_id: String,
65    pub credential_id: String,
66    pub authenticator_data: String,
67    pub client_data_json: String,
68    pub signature: String,
69    pub user_handle: Option<String>,
70}
71
72/// Supporting structures
73#[derive(Debug, Serialize, Deserialize)]
74pub struct PublicKeyCredentialRpEntity {
75    pub id: String,
76    pub name: String,
77}
78
79#[derive(Debug, Serialize, Deserialize)]
80pub struct PublicKeyCredentialUserEntity {
81    pub id: String,
82    pub name: String,
83    pub display_name: String,
84}
85
86#[derive(Debug, Serialize, Deserialize)]
87pub struct PublicKeyCredentialParameters {
88    #[serde(rename = "type")]
89    pub type_field: String,
90    pub alg: i32,
91}
92
93#[derive(Debug, Serialize, Deserialize)]
94pub struct PublicKeyCredentialDescriptor {
95    #[serde(rename = "type")]
96    pub type_field: String,
97    pub id: String,
98    pub transports: Option<Vec<String>>,
99}
100
101#[derive(Debug, Serialize, Deserialize)]
102pub struct AuthenticatorSelectionCriteria {
103    pub authenticator_attachment: Option<String>,
104    pub require_resident_key: Option<bool>,
105    pub user_verification: String,
106}
107
108/// Initiate WebAuthn registration process
109pub async fn webauthn_registration_init(
110    State(_state): State<ApiState>,
111    Json(request): Json<WebAuthnRegistrationInitRequest>,
112) -> Json<ApiResponse<WebAuthnRegistrationResponse>> {
113    // Generate a secure challenge
114    let mut challenge_bytes = [0u8; 32];
115    rand::rng().fill_bytes(&mut challenge_bytes);
116    let challenge = base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(challenge_bytes);
117
118    // Generate user ID
119    let user_id =
120        base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(request.username.as_bytes());
121
122    // Create session ID for tracking this registration
123    let session_id = format!("webauthn_{}", uuid::Uuid::new_v4());
124
125    let response = WebAuthnRegistrationResponse {
126        challenge: challenge.clone(),
127        rp: PublicKeyCredentialRpEntity {
128            id: "localhost".to_string(), // Should come from config
129            name: "AuthFramework".to_string(),
130        },
131        user: PublicKeyCredentialUserEntity {
132            id: user_id,
133            name: request.username.clone(),
134            display_name: request.display_name.unwrap_or(request.username.clone()),
135        },
136        pubkey_cred_params: vec![
137            PublicKeyCredentialParameters {
138                type_field: "public-key".to_string(),
139                alg: -7, // ES256
140            },
141            PublicKeyCredentialParameters {
142                type_field: "public-key".to_string(),
143                alg: -257, // RS256
144            },
145        ],
146        timeout: Some(60000),
147        exclude_credentials: None,
148        authenticator_selection: Some(AuthenticatorSelectionCriteria {
149            authenticator_attachment: request.authenticator_attachment,
150            require_resident_key: Some(false),
151            user_verification: request.user_verification.unwrap_or("preferred".to_string()),
152        }),
153        attestation: "none".to_string(),
154        session_id: session_id.clone(),
155    };
156
157    // Store the challenge and session info temporarily
158    let _session_key = format!("webauthn_reg_session:{}", session_id);
159    let _session_data = serde_json::json!({
160        "challenge": challenge,
161        "username": request.username,
162        "timestamp": chrono::Utc::now().timestamp()
163    });
164
165    Json(ApiResponse::success_with_message(
166        response,
167        "WebAuthn registration challenge generated",
168    ))
169}
170
171/// Complete WebAuthn registration process
172pub async fn webauthn_registration_complete(
173    State(_state): State<ApiState>,
174    Json(request): Json<WebAuthnRegistrationCompleteRequest>,
175) -> Json<ApiResponse<()>> {
176    // Simplified validation - in production, implement proper session management
177    let _username = "test_user"; // Placeholder
178
179    // Basic validation (in production, implement full WebAuthn validation)
180    if request.credential_id.is_empty() || request.attestation_object.is_empty() {
181        return Json(ApiResponse::validation_error("Invalid credential data"));
182    }
183
184    // Basic validation (in production, implement full WebAuthn validation)
185    if request.credential_id.is_empty() || request.attestation_object.is_empty() {
186        return Json(ApiResponse::validation_error("Invalid credential data"));
187    }
188
189    Json(ApiResponse::<()>::ok_with_message(
190        "WebAuthn credential registered successfully",
191    ))
192}
193
194/// Initiate WebAuthn authentication process
195pub async fn webauthn_authentication_init(
196    State(_state): State<ApiState>,
197    Json(request): Json<WebAuthnAuthenticationRequest>,
198) -> Json<ApiResponse<WebAuthnAuthenticationResponse>> {
199    let mut challenge_bytes = [0u8; 32];
200    rand::rng().fill_bytes(&mut challenge_bytes);
201    let challenge = base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(challenge_bytes);
202
203    let session_id = format!("webauthn_auth_{}", uuid::Uuid::new_v4());
204
205    // Get user's registered credentials - placeholder implementation
206    let allow_credentials = Vec::new(); // In production, query user's registered credentials
207
208    let response = WebAuthnAuthenticationResponse {
209        challenge: challenge.clone(),
210        allow_credentials,
211        timeout: Some(60000),
212        user_verification: request.user_verification.unwrap_or("preferred".to_string()),
213        session_id: session_id.clone(),
214    };
215
216    // Store auth session
217    let _session_key = format!("webauthn_auth_session:{}", session_id);
218    let _session_data = serde_json::json!({
219        "challenge": challenge,
220        "username": request.username,
221        "timestamp": chrono::Utc::now().timestamp()
222    });
223
224    Json(ApiResponse::success_with_message(
225        response,
226        "WebAuthn authentication challenge generated",
227    ))
228}
229
230/// Complete WebAuthn authentication process
231pub async fn webauthn_authentication_complete(
232    State(_state): State<ApiState>,
233    Json(_request): Json<WebAuthnAuthenticationCompleteRequest>,
234) -> Json<ApiResponse<serde_json::Value>> {
235    // Basic session validation - in production, implement proper session management
236
237    // For now, simulate successful authentication
238    // In production, implement full WebAuthn signature verification
239
240    // Generate authentication token
241    let auth_response = serde_json::json!({
242        "access_token": "webauthn_generated_token",
243        "token_type": "Bearer",
244        "expires_in": 3600,
245        "user_id": "webauthn_user",
246        "authentication_method": "webauthn"
247    });
248
249    // Clean up session - placeholder
250
251    Json(ApiResponse::success_with_message(
252        auth_response,
253        "WebAuthn authentication successful",
254    ))
255}
256
257/// List user's registered WebAuthn credentials
258pub async fn list_webauthn_credentials(
259    State(_state): State<ApiState>,
260    axum::extract::Path(username): axum::extract::Path<String>,
261) -> Json<ApiResponse<Vec<serde_json::Value>>> {
262    // In production, implement proper credential enumeration
263    // This is a placeholder implementation
264
265    let credentials = vec![]; // Placeholder
266
267    Json(ApiResponse::success_with_message(
268        credentials,
269        format!("WebAuthn credentials retrieved for user: {}", username),
270    ))
271}
272
273/// Delete a WebAuthn credential
274pub async fn delete_webauthn_credential(
275    State(_state): State<ApiState>,
276    axum::extract::Path((username, credential_id)): axum::extract::Path<(String, String)>,
277) -> Json<ApiResponse<()>> {
278    let _credential_key = format!("webauthn_credential:{}:{}", username, credential_id);
279
280    // Placeholder - in production, implement proper credential deletion
281    Json(ApiResponse::<()>::ok_with_message(
282        "WebAuthn credential deleted successfully",
283    ))
284}
auth_framework/api/webauthn.rs

auth_framework/api/
webauthn.rs
