amberjs 1.16.1

// 身份验证系统
//
// 提供多因素认证 (MFA) 和 JWT 令牌管理功能

use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::sync::{Arc, Mutex};
use std::time::{Duration, SystemTime, UNIX_EPOCH};
use thiserror::Error;

/// 身份验证错误
#[derive(Error, Debug)]
pub enum AuthError {
    #[error("Authentication failed: {0}")]
    AuthenticationFailed(String),
    #[error("Invalid token")]
    InvalidToken,
    #[error("Token expired")]
    TokenExpired,
    #[error("MFA required")]
    MfaRequired,
    #[error("Invalid MFA code")]
    InvalidMfaCode,
}
/// 用户凭据
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Credentials {
    pub username: String,
    pub password: String,
    pub mfa_code: Option<String>,
}
/// 认证结果
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AuthResult {
    pub success: bool,
    pub token: Option<String>,
    pub user_id: Option<String>,
    pub mfa_required: bool,
    pub error: Option<String>,
}
/// JWT 令牌
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Token {
    pub token: String,
    pub user_id: String,
    pub expires_at: SystemTime,
}
/// 用户信息
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct User {
    pub id: String,
    pub username: String,
    pub roles: Vec<String>,
    pub mfa_enabled: bool,
}
/// 多因素认证服务
#[derive(Debug)]
pub struct MultiFactorAuth {
    secret_key: String,
    backup_codes: Vec<String>,
}
impl MultiFactorAuth {
    pub fn new() -> Self {
        Self {
            secret_key: "default-secret-key".to_string(), // 生产环境应使用安全的密钥生成
            backup_codes: vec!["123456".to_string(), "789012".to_string()],
        }
    }
    pub async fn verify_code(&self, code: &str) -> Result<bool, AuthError> {
        // 简化的 MFA 验证（生产环境应使用 TOTP）
        if self.backup_codes.contains(&code.to_string()) {
            Ok(true)
        } else {
            Err(AuthError::InvalidMfaCode)
        }
    }
}
/// 令牌管理器
#[derive(Debug)]
pub struct TokenManager {
    tokens: Arc<std::sync::Mutex<HashMap<String, Token>>>,
}
impl TokenManager {
    pub fn new() -> Self {
        Self {
            tokens: Arc::new(Mutex::new(HashMap::new())),
        }
    }
    pub async fn generate_token(&self, user: &User) -> Result<Token, AuthError> {
        let token_string: _ = format!(
            "amberjs-token-{}-{}",
            user.id,
            SystemTime::now()
                .duration_since(UNIX_EPOCH)
                .unwrap()
                .as_secs()
        );
        let expires_at: _ = SystemTime::now() + Duration::from_secs(3600); // 1小时过期
        let token: _ = Token {
            token: token_string,
            user_id: user.id.clone(),
            expires_at,
        };
        {
            let mut tokens = self.tokens.lock().unwrap();
            tokens.insert(token.token.clone(), token.clone());
        }
        Ok(token)
    }
    pub async fn validate_token(&self, token_str: &str) -> Result<User, AuthError> {
        let tokens: _ = self.tokens.lock().unwrap();
        if let Some(token) = tokens.get(token_str) {
            if token.expires_at > SystemTime::now() {
                // 返回模拟用户信息（生产环境应从数据库获取）
                return Ok(User {
                    id: token.user_id.clone(),
                    username: "user".to_string(),
                    roles: vec!["user".to_string()],
                    mfa_enabled: true,
                });
            } else {
                return Err(AuthError::TokenExpired);
            }
        }
        Err(AuthError::InvalidToken)
    }
    pub async fn revoke_token(&self, token_str: &str) -> Result<(), AuthError> {
        let mut tokens = self.tokens.lock().unwrap();
        tokens.remove(token_str);
        Ok(())
    }
}
/// 身份验证服务
#[derive(Debug)]
pub struct AuthenticationService {
    pub mfa_service: Arc<MultiFactorAuth>,
    pub token_manager: Arc<TokenManager>,
    users: Arc<std::sync::Mutex<HashMap<String, User>>>,
}
impl AuthenticationService {
    pub fn new() -> Self {
        let mut users = HashMap::new();
        users.insert(
            "admin".to_string(),
            User {
                id: "1".to_string(),
                username: "admin".to_string(),
                roles: vec!["admin".to_string(), "user".to_string()],
                mfa_enabled: true,
            },
        );
        Self {
            mfa_service: Arc::new(MultiFactorAuth::new()),
            token_manager: Arc::new(TokenManager::new()),
            users: Arc::new(Mutex::new(users)),
        }
    }
    pub async fn authenticate(&self, credentials: &Credentials) -> Result<AuthResult, AuthError> {
        // 验证用户名和密码
        let users: _ = self.users.lock().unwrap();
        if let Some(user) = users.get(&credentials.username) {
            // 简化的密码验证（生产环境应使用哈希）
            if credentials.password == "password" || credentials.password == "admin" {
                // 如果启用了 MFA，验证 MFA 代码
                if user.mfa_enabled {
                    if let Some(mfa_code) = &credentials.mfa_code {
                        let mfa_valid: _ =
                            self.mfa_service.verify_code(mfa_code).await.map_err(|_| {
                                AuthError::AuthenticationFailed("Invalid MFA code".to_string())
                            })?;
                        if !mfa_valid {
                            return Ok(AuthResult {
                                success: false,
                                token: None,
                                user_id: None,
                                mfa_required: true,
                                error: Some("Invalid MFA code".to_string()),
                            });
                        }
                    } else {
                        return Ok(AuthResult {
                            success: false,
                            token: None,
                            user_id: None,
                            mfa_required: true,
                            error: Some("MFA code required".to_string()),
                        });
                    }
                }
                // 生成令牌
                let token: _ = self.token_manager.generate_token(user).await?;
                return Ok(AuthResult {
                    success: true,
                    token: Some(token.token),
                    user_id: Some(user.id.clone()),
                    mfa_required: false,
                    error: None,
                });
            }
        }
        Ok(AuthResult {
            success: false,
            token: None,
            user_id: None,
            mfa_required: false,
            error: Some("Invalid credentials".to_string()),
        })
    }
    pub async fn verify_mfa(&self, username: &str, code: &str) -> Result<AuthResult, AuthError> {
        let users: _ = self.users.lock().unwrap();
        if let Some(user) = users.get(username) {
            let mfa_valid: _ = self
                .mfa_service
                .verify_code(code)
                .await
                .map_err(|_| AuthError::AuthenticationFailed("Invalid MFA code".to_string()))?;
            if mfa_valid {
                let token: _ = self.token_manager.generate_token(user).await?;
                return Ok(AuthResult {
                    success: true,
                    token: Some(token.token),
                    user_id: Some(user.id.clone()),
                    mfa_required: false,
                    error: None,
                });
            }
        }
        Err(AuthError::InvalidMfaCode)
    }
}
// 默认实现
impl Default for MultiFactorAuth {
    fn default() -> Self {
        Self::new()
    }
}
impl Default for TokenManager {
    fn default() -> Self {
        Self::new()
    }
}
impl Default for AuthenticationService {
    fn default() -> Self {
        Self::new()
    }
}