mcmare/RustAPI | Gitverse

engine/src/webui/auth.rs
125 строк4 KB
mcmare
Add WebUI: zero-config bootstrap, admin login, browser-based settings/endpoints/scripts management
18 июл 2026, 18:34
18 июл 2026, 18:34e401c22
use anyhow::{Context, Result};
use argon2::{
    password_hash::{rand_core::OsRng, PasswordHash, PasswordHasher, PasswordVerifier, SaltString},
    Argon2,
};
use axum::{
    extract::{Request, State},
    http::{header, StatusCode},
    middleware::Next,
    response::Response,
};
use jsonwebtoken::{decode, encode, Algorithm, DecodingKey, EncodingKey, Header, Validation};
use serde::{Deserialize, Serialize};
use std::path::{Path, PathBuf};

const SESSION_COOKIE: &str = "admin_session";
const SESSION_TTL_SECONDS: i64 = 12 * 60 * 60;

#[derive(Serialize, Deserialize, Clone)]
pub struct AdminCredentials {
    pub username: String,
    pub password_hash: String,
}

fn admin_file(data_dir: &Path) -> PathBuf {
    data_dir.join("admin.yaml")
}

pub fn load_admin(data_dir: &Path) -> Result<Option<AdminCredentials>> {
    let path = admin_file(data_dir);
    if !path.exists() {
        return Ok(None);
    }
    let text = std::fs::read_to_string(&path).with_context(|| format!("failed to read {}", path.display()))?;
    Ok(Some(
        serde_yaml::from_str(&text).with_context(|| format!("failed to parse {}", path.display()))?,
    ))
}

pub fn save_admin(data_dir: &Path, creds: &AdminCredentials) -> Result<()> {
    let path = admin_file(data_dir);
    let text = serde_yaml::to_string(creds)?;
    std::fs::write(&path, text).with_context(|| format!("failed to write {}", path.display()))
}

pub fn hash_password(plain: &str) -> Result<String> {
    let salt = SaltString::generate(&mut OsRng);
    Argon2::default()
        .hash_password(plain.as_bytes(), &salt)
        .map(|h| h.to_string())
        .map_err(|e| anyhow::anyhow!("failed to hash password: {e}"))
}

pub fn verify_password(plain: &str, hash: &str) -> bool {
    let Ok(parsed) = PasswordHash::new(hash) else {
        return false;
    };
    Argon2::default().verify_password(plain.as_bytes(), &parsed).is_ok()
}

#[derive(Serialize, Deserialize)]
struct SessionClaims {
    sub: String,
    exp: i64,
}

pub fn sign_session(username: &str, jwt_secret: &str) -> Result<String> {
    let claims = SessionClaims {
        sub: username.to_string(),
        exp: chrono::Utc::now().timestamp() + SESSION_TTL_SECONDS,
    };
    encode(&Header::new(Algorithm::HS256), &claims, &EncodingKey::from_secret(jwt_secret.as_bytes()))
        .map_err(|e| anyhow::anyhow!("failed to sign session: {e}"))
}

fn verify_session(token: &str, jwt_secret: &str) -> bool {
    decode::<SessionClaims>(
        token,
        &DecodingKey::from_secret(jwt_secret.as_bytes()),
        &Validation::new(Algorithm::HS256),
    )
    .is_ok()
}

pub fn session_cookie_header(token: &str) -> String {
    format!("{SESSION_COOKIE}={token}; HttpOnly; Path=/; SameSite=Lax; Max-Age={SESSION_TTL_SECONDS}")
}

pub fn clear_session_cookie_header() -> String {
    format!("{SESSION_COOKIE}=; HttpOnly; Path=/; SameSite=Lax; Max-Age=0")
}

fn extract_cookie<'a>(header_value: &'a str, name: &str) -> Option<&'a str> {
    header_value.split(';').map(|s| s.trim()).find_map(|kv| {
        let (k, v) = kv.split_once('=')?;
        (k == name).then_some(v)
    })
}

pub fn has_valid_session(headers: &axum::http::HeaderMap, jwt_secret: &str) -> bool {
    headers
        .get(header::COOKIE)
        .and_then(|v| v.to_str().ok())
        .and_then(|v| extract_cookie(v, SESSION_COOKIE))
        .is_some_and(|token| verify_session(token, jwt_secret))
}

#[derive(Clone)]
pub struct AdminAuthState {
    pub jwt_secret: String,
}

/// Guards every `/ui/api/*` route except `status`/`setup`/`login` — those three have to
/// stay reachable without a session, since a session is exactly what they're for.
pub async fn require_admin_session(
    State(state): State<AdminAuthState>,
    req: Request,
    next: Next,
) -> Result<Response, StatusCode> {
    if has_valid_session(req.headers(), &state.jwt_secret) {
        Ok(next.run(req).await)
    } else {
        Err(StatusCode::UNAUTHORIZED)
    }
}