Alexander Abakumov
15e744da49
- Added comprehensive course structure with 11 modules - Included theoretical content, practical examples, and tasks - Multi-language code examples (Java, Rust, Node.js, Python) - Detailed analysis of architectural approaches and trade-offs - Complete caching strategies documentation - Architecture examples from real-world systems (Twitter, Netflix, Uber) - Structured navigation and learning path - Ready for educational use
724 lines
23 KiB
Markdown
724 lines
23 KiB
Markdown
# Уязвимости и межсервисное взаимодействие
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## Навигация
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- [🏠 Главная страница курса](../../../README.md)
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- [📚 Модуль 6](../README.md)
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---
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## Типы уязвимостей в микросервисной архитектуре
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### 1. Уязвимости межсервисного взаимодействия
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**Проблемы:**
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- Отсутствие аутентификации между сервисами
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- Передача чувствительных данных в открытом виде
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- Отсутствие валидации токенов
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- Man-in-the-middle атаки
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- Replay атаки
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**Решения:**
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- Mutual TLS (mTLS)
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- Service-to-Service токены
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- API Gateway с аутентификацией
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- Token Validation Middleware (TVM)
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### 2. TVM (Token Validation Middleware)
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**TVM** — промежуточное ПО для валидации токенов между микросервисами.
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**Принципы работы:**
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1. Сервис получает токен от клиента
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2. TVM валидирует токен
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3. TVM извлекает информацию о пользователе/сервисе
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4. TVM передает валидные данные в целевой сервис
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**Технический пример - TVM Implementation:**
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```java
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@Component
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public class TokenValidationMiddleware {
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@Autowired
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private JwtTokenService jwtTokenService;
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@Autowired
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private ServiceRegistry serviceRegistry;
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public ServiceTokenValidationResult validateServiceToken(String token, String targetService) {
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try {
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// Валидация токена
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Claims claims = jwtTokenService.validateToken(token);
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// Проверка прав доступа к сервису
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if (!hasAccessToService(claims, targetService)) {
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return ServiceTokenValidationResult.denied("No access to service: " + targetService);
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}
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// Проверка срока действия токена
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if (isTokenExpired(claims)) {
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return ServiceTokenValidationResult.denied("Token expired");
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}
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// Извлечение информации о сервисе
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ServiceInfo serviceInfo = extractServiceInfo(claims);
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return ServiceTokenValidationResult.success(serviceInfo);
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} catch (JwtException e) {
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return ServiceTokenValidationResult.denied("Invalid token: " + e.getMessage());
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}
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}
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private boolean hasAccessToService(Claims claims, String targetService) {
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List<String> allowedServices = claims.get("allowed_services", List.class);
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return allowedServices != null && allowedServices.contains(targetService);
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}
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private boolean isTokenExpired(Claims claims) {
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Date expiration = claims.getExpiration();
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return expiration.before(new Date());
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}
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private ServiceInfo extractServiceInfo(Claims claims) {
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return ServiceInfo.builder()
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.serviceId(claims.getSubject())
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.serviceName(claims.get("service_name", String.class))
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.permissions(claims.get("permissions", List.class))
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.issuedAt(claims.getIssuedAt())
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.expiresAt(claims.getExpiration())
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.build();
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}
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}
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// Service Token Validation Result
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@Data
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@Builder
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public class ServiceTokenValidationResult {
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private boolean valid;
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private String errorMessage;
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private ServiceInfo serviceInfo;
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public static ServiceTokenValidationResult success(ServiceInfo serviceInfo) {
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return ServiceTokenValidationResult.builder()
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.valid(true)
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.serviceInfo(serviceInfo)
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.build();
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}
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public static ServiceTokenValidationResult denied(String errorMessage) {
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return ServiceTokenValidationResult.builder()
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.valid(false)
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.errorMessage(errorMessage)
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.build();
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}
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}
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// Service Info
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@Data
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@Builder
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public class ServiceInfo {
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private String serviceId;
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private String serviceName;
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private List<String> permissions;
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private Date issuedAt;
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private Date expiresAt;
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}
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```
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**Rust примеры - TVM с Actix Web:**
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```rust
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// Token Validation Middleware для Actix Web
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use actix_web::{web, HttpRequest, HttpResponse, Error, middleware::Next};
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use jsonwebtoken::{decode, DecodingKey, Validation, Algorithm};
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use serde::{Deserialize, Serialize};
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use std::collections::HashSet;
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#[derive(Debug, Serialize, Deserialize)]
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struct ServiceClaims {
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sub: String, // service_id
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service_name: String,
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allowed_services: Vec<String>,
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permissions: Vec<String>,
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iat: u64, // issued_at
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exp: u64, // expires_at
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}
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#[derive(Debug, Clone)]
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pub struct ServiceInfo {
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pub service_id: String,
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pub service_name: String,
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pub permissions: Vec<String>,
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}
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pub struct TokenValidationMiddleware {
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decoding_key: DecodingKey,
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validation: Validation,
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}
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impl TokenValidationMiddleware {
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pub fn new(secret: &str) -> Self {
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let mut validation = Validation::new(Algorithm::HS256);
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validation.set_issuer(&["microservices-platform"]);
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Self {
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decoding_key: DecodingKey::from_secret(secret.as_ref()),
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validation,
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}
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}
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pub fn validate_service_token(
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&self,
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token: &str,
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target_service: &str,
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) -> Result<ServiceInfo, String> {
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// Декодирование токена
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let token_data = decode::<ServiceClaims>(token, &self.decoding_key, &self.validation)
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.map_err(|e| format!("Token validation failed: {}", e))?;
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let claims = token_data.claims;
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// Проверка срока действия
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let now = chrono::Utc::now().timestamp() as u64;
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if claims.exp < now {
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return Err("Token expired".to_string());
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}
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// Проверка прав доступа к сервису
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if !claims.allowed_services.contains(&target_service.to_string()) {
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return Err(format!("No access to service: {}", target_service));
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}
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Ok(ServiceInfo {
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service_id: claims.sub,
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service_name: claims.service_name,
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permissions: claims.permissions,
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})
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}
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}
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// Middleware для Actix Web
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pub async fn token_validation_middleware(
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req: HttpRequest,
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next: Next,
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) -> Result<HttpResponse, Error> {
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// Извлечение токена из заголовка
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let token = req.headers()
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.get("Authorization")
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.and_then(|h| h.to_str().ok())
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.and_then(|s| s.strip_prefix("Bearer "));
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match token {
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Some(token) => {
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// Валидация токена
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let middleware = TokenValidationMiddleware::new("your-secret-key");
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let target_service = req.path().split('/').nth(1).unwrap_or("unknown");
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match middleware.validate_service_token(token, target_service) {
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Ok(service_info) => {
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// Добавление информации о сервисе в контекст запроса
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req.extensions_mut().insert(service_info);
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next.run(req).await
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}
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Err(e) => Ok(HttpResponse::Unauthorized()
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.json(serde_json::json!({
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"error": "Token validation failed",
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"message": e
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})))
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}
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}
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None => Ok(HttpResponse::Unauthorized()
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.json(serde_json::json!({
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"error": "Missing authorization token"
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})))
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}
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}
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```
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**Python примеры - TVM с FastAPI:**
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```python
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# Token Validation Middleware для FastAPI
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from fastapi import FastAPI, HTTPException, Depends, Request
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from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
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from jose import JWTError, jwt
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from datetime import datetime, timedelta
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from typing import Optional, List
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from pydantic import BaseModel
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class ServiceClaims(BaseModel):
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sub: str
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service_name: str
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allowed_services: List[str]
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permissions: List[str]
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iat: int
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exp: int
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class ServiceInfo(BaseModel):
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service_id: str
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service_name: str
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permissions: List[str]
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class TokenValidationMiddleware:
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def __init__(self, secret_key: str):
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self.secret_key = secret_key
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self.algorithm = "HS256"
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def validate_service_token(self, token: str, target_service: str) -> ServiceInfo:
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try:
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# Декодирование токена
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payload = jwt.decode(token, self.secret_key, algorithms=[self.algorithm])
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# Проверка срока действия
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if datetime.utcnow().timestamp() > payload.get("exp", 0):
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raise HTTPException(status_code=401, detail="Token expired")
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# Проверка прав доступа к сервису
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allowed_services = payload.get("allowed_services", [])
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if target_service not in allowed_services:
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raise HTTPException(
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status_code=403,
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detail=f"No access to service: {target_service}"
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)
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return ServiceInfo(
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service_id=payload.get("sub"),
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service_name=payload.get("service_name"),
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permissions=payload.get("permissions", [])
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)
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except JWTError as e:
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raise HTTPException(status_code=401, detail=f"Invalid token: {str(e)}")
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# Dependency для FastAPI
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security = HTTPBearer()
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middleware = TokenValidationMiddleware("your-secret-key")
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async def get_service_info(
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credentials: HTTPAuthorizationCredentials = Depends(security),
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request: Request = None
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) -> ServiceInfo:
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token = credentials.credentials
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target_service = request.url.path.split('/')[1] if request else "unknown"
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return middleware.validate_service_token(token, target_service)
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# Использование в FastAPI
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app = FastAPI()
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@app.get("/api/orders")
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async def get_orders(service_info: ServiceInfo = Depends(get_service_info)):
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# Проверка прав доступа
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if "read:orders" not in service_info.permissions:
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raise HTTPException(status_code=403, detail="Insufficient permissions")
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return {"message": "Orders retrieved", "service": service_info.service_name}
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```
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**Node.js примеры - TVM с Express:**
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```typescript
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// Token Validation Middleware для Express
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import express, { Request, Response, NextFunction } from 'express';
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import jwt from 'jsonwebtoken';
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import { Request as JWTRequest } from 'express-jwt';
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interface ServiceClaims {
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sub: string;
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service_name: string;
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allowed_services: string[];
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permissions: string[];
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iat: number;
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exp: number;
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}
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interface ServiceInfo {
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service_id: string;
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service_name: string;
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permissions: string[];
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}
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class TokenValidationMiddleware {
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private secretKey: string;
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private algorithm: string = 'HS256';
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constructor(secretKey: string) {
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this.secretKey = secretKey;
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}
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validateServiceToken(token: string, targetService: string): ServiceInfo {
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try {
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// Декодирование токена
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const payload = jwt.verify(token, this.secretKey, {
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algorithms: [this.algorithm]
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}) as ServiceClaims;
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// Проверка срока действия
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if (Date.now() / 1000 > payload.exp) {
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throw new Error('Token expired');
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}
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// Проверка прав доступа к сервису
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if (!payload.allowed_services.includes(targetService)) {
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throw new Error(`No access to service: ${targetService}`);
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}
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return {
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service_id: payload.sub,
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service_name: payload.service_name,
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permissions: payload.permissions
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};
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} catch (error) {
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throw new Error(`Token validation failed: ${error.message}`);
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}
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}
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}
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// Middleware для Express
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const middleware = new TokenValidationMiddleware('your-secret-key');
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export const tokenValidationMiddleware = (req: Request, res: Response, next: NextFunction) => {
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try {
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const authHeader = req.headers.authorization;
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if (!authHeader || !authHeader.startsWith('Bearer ')) {
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return res.status(401).json({ error: 'Missing authorization token' });
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}
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const token = authHeader.substring(7);
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const targetService = req.path.split('/')[2] || 'unknown';
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const serviceInfo = middleware.validateServiceToken(token, targetService);
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// Добавление информации о сервисе в контекст запроса
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(req as any).serviceInfo = serviceInfo;
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next();
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} catch (error) {
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res.status(401).json({
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error: 'Token validation failed',
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message: error.message
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});
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}
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};
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// Использование в Express
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app.use('/api', tokenValidationMiddleware);
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app.get('/api/orders', (req: Request, res: Response) => {
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const serviceInfo = (req as any).serviceInfo;
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// Проверка прав доступа
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if (!serviceInfo.permissions.includes('read:orders')) {
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return res.status(403).json({ error: 'Insufficient permissions' });
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}
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res.json({
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message: 'Orders retrieved',
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service: serviceInfo.service_name
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});
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});
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```
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### 3. Mutual TLS (mTLS)
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**mTLS** обеспечивает взаимную аутентификацию между сервисами.
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**Java пример - Spring Boot с mTLS:**
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```java
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@Configuration
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@EnableWebSecurity
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public class MTlsSecurityConfig {
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@Bean
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public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
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return http
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.authorizeHttpRequests(auth -> auth
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.requestMatchers("/api/public/**").permitAll()
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.anyRequest().authenticated()
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)
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.x509(x509 -> x509
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.subjectPrincipalRegex("CN=(.*?)(?:,|$)")
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.userDetailsService(userDetailsService())
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)
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.build();
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}
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@Bean
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public UserDetailsService userDetailsService() {
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return username -> {
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// Валидация сертификата клиента
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if (isValidServiceCertificate(username)) {
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return User.builder()
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.username(username)
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.password("")
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.authorities("ROLE_SERVICE")
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.build();
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}
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throw new UsernameNotFoundException("Invalid service certificate");
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};
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}
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private boolean isValidServiceCertificate(String subject) {
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// Логика валидации сертификата
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return subject.startsWith("service-");
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}
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}
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```
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### 4. Service Mesh Security
|
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**Istio Security Configuration:**
|
||
|
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```yaml
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# PeerAuthentication для mTLS
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apiVersion: security.istio.io/v1beta1
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kind: PeerAuthentication
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metadata:
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name: default
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namespace: production
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spec:
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mtls:
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mode: STRICT
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|
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# AuthorizationPolicy для контроля доступа
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apiVersion: security.istio.io/v1beta1
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kind: AuthorizationPolicy
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metadata:
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name: service-access
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namespace: production
|
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spec:
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rules:
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- from:
|
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- source:
|
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principals: ["cluster.local/ns/production/sa/order-service"]
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to:
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- operation:
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methods: ["GET", "POST"]
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paths: ["/api/orders/*"]
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```
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|
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### 5. API Gateway Security
|
||
|
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**Kong Gateway Configuration:**
|
||
|
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```yaml
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# Kong API Gateway с JWT аутентификацией
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apiVersion: configuration.konghq.com/v1
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kind: KongPlugin
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metadata:
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name: jwt-auth
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config:
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key_claim_name: iss
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secret_is_base64: false
|
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run_on_preflight: true
|
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---
|
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apiVersion: configuration.konghq.com/v1
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kind: KongIngress
|
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metadata:
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name: api-ingress
|
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upstream:
|
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healthchecks:
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active:
|
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healthy:
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interval: 30
|
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successes: 3
|
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unhealthy:
|
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interval: 10
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http_failures: 3
|
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```
|
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|
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### 6. Security Headers для микросервисов
|
||
|
||
**Java пример - Security Headers:**
|
||
|
||
```java
|
||
@Component
|
||
public class SecurityHeadersFilter implements Filter {
|
||
|
||
@Override
|
||
public void doFilter(ServletRequest request, ServletResponse response,
|
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FilterChain chain) throws IOException, ServletException {
|
||
|
||
HttpServletResponse httpResponse = (HttpServletResponse) response;
|
||
|
||
// Security Headers
|
||
httpResponse.setHeader("X-Content-Type-Options", "nosniff");
|
||
httpResponse.setHeader("X-Frame-Options", "DENY");
|
||
httpResponse.setHeader("X-XSS-Protection", "1; mode=block");
|
||
httpResponse.setHeader("Strict-Transport-Security", "max-age=31536000; includeSubDomains");
|
||
httpResponse.setHeader("Content-Security-Policy", "default-src 'self'");
|
||
httpResponse.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
|
||
httpResponse.setHeader("Permissions-Policy", "geolocation=(), microphone=(), camera=()");
|
||
|
||
chain.doFilter(request, response);
|
||
}
|
||
}
|
||
```
|
||
|
||
### 7. Rate Limiting для межсервисного взаимодействия
|
||
|
||
**Redis-based Rate Limiting:**
|
||
|
||
```java
|
||
@Service
|
||
public class InterServiceRateLimitingService {
|
||
|
||
@Autowired
|
||
private RedisTemplate<String, String> redisTemplate;
|
||
|
||
public boolean isAllowed(String serviceId, String targetService, int maxRequests, Duration window) {
|
||
String key = String.format("rate_limit:%s:%s", serviceId, targetService);
|
||
|
||
// Sliding window rate limiting
|
||
long now = System.currentTimeMillis();
|
||
long windowStart = now - window.toMillis();
|
||
|
||
// Удаление старых записей
|
||
redisTemplate.opsForZSet().removeRangeByScore(key, 0, windowStart);
|
||
|
||
// Подсчет текущих запросов
|
||
Long currentCount = redisTemplate.opsForZSet().count(key, windowStart, now);
|
||
|
||
if (currentCount >= maxRequests) {
|
||
return false;
|
||
}
|
||
|
||
// Добавление нового запроса
|
||
redisTemplate.opsForZSet().add(key, UUID.randomUUID().toString(), now);
|
||
redisTemplate.expire(key, window);
|
||
|
||
return true;
|
||
}
|
||
}
|
||
```
|
||
|
||
### 8. Audit Logging для межсервисного взаимодействия
|
||
|
||
**Structured Audit Logging:**
|
||
|
||
```java
|
||
@Component
|
||
public class InterServiceAuditLogger {
|
||
|
||
private static final Logger auditLogger = LoggerFactory.getLogger("AUDIT");
|
||
|
||
public void logServiceCall(String sourceService, String targetService,
|
||
String operation, boolean success, String details) {
|
||
|
||
Map<String, Object> auditData = Map.of(
|
||
"timestamp", Instant.now().toString(),
|
||
"source_service", sourceService,
|
||
"target_service", targetService,
|
||
"operation", operation,
|
||
"success", success,
|
||
"details", details,
|
||
"correlation_id", MDC.get("correlationId")
|
||
);
|
||
|
||
auditLogger.info("Inter-service call: {}", auditData);
|
||
}
|
||
}
|
||
```
|
||
|
||
### 9. Circuit Breaker для безопасности
|
||
|
||
**Resilience4j Circuit Breaker:**
|
||
|
||
```java
|
||
@Component
|
||
public class SecureServiceClient {
|
||
|
||
private final CircuitBreaker circuitBreaker;
|
||
private final Retry retry;
|
||
|
||
public SecureServiceClient() {
|
||
this.circuitBreaker = CircuitBreaker.ofDefaults("secure-service");
|
||
this.retry = Retry.ofDefaults("secure-service");
|
||
}
|
||
|
||
@CircuitBreaker(name = "secure-service")
|
||
@Retry(name = "secure-service")
|
||
public ServiceResponse callSecureService(String serviceUrl, String token) {
|
||
try {
|
||
// Вызов защищенного сервиса
|
||
return restTemplate.exchange(
|
||
serviceUrl,
|
||
HttpMethod.GET,
|
||
createSecureRequest(token),
|
||
ServiceResponse.class
|
||
).getBody();
|
||
} catch (Exception e) {
|
||
// Логирование безопасности
|
||
securityLogger.warn("Secure service call failed: {}", e.getMessage());
|
||
throw e;
|
||
}
|
||
}
|
||
|
||
private HttpEntity<?> createSecureRequest(String token) {
|
||
HttpHeaders headers = new HttpHeaders();
|
||
headers.setBearerAuth(token);
|
||
headers.set("X-Service-Name", "order-service");
|
||
headers.set("X-Request-ID", UUID.randomUUID().toString());
|
||
|
||
return new HttpEntity<>(headers);
|
||
}
|
||
}
|
||
```
|
||
|
||
### 10. Security Monitoring и Alerting
|
||
|
||
**Security Metrics:**
|
||
|
||
```java
|
||
@Component
|
||
public class SecurityMetrics {
|
||
|
||
private final MeterRegistry meterRegistry;
|
||
private final Counter authenticationFailures;
|
||
private final Counter authorizationFailures;
|
||
private final Timer serviceCallDuration;
|
||
|
||
public SecurityMetrics(MeterRegistry meterRegistry) {
|
||
this.meterRegistry = meterRegistry;
|
||
this.authenticationFailures = Counter.builder("security.auth.failures")
|
||
.description("Authentication failures")
|
||
.register(meterRegistry);
|
||
this.authorizationFailures = Counter.builder("security.authz.failures")
|
||
.description("Authorization failures")
|
||
.register(meterRegistry);
|
||
this.serviceCallDuration = Timer.builder("security.service.call.duration")
|
||
.description("Secure service call duration")
|
||
.register(meterRegistry);
|
||
}
|
||
|
||
public void recordAuthenticationFailure(String reason) {
|
||
authenticationFailures.increment(Tags.of("reason", reason));
|
||
}
|
||
|
||
public void recordAuthorizationFailure(String resource) {
|
||
authorizationFailures.increment(Tags.of("resource", resource));
|
||
}
|
||
|
||
public Timer.Sample startServiceCallTimer() {
|
||
return Timer.start(meterRegistry);
|
||
}
|
||
}
|
||
```
|
||
|
||
## Заключение
|
||
|
||
Безопасность межсервисного взаимодействия требует комплексного подхода:
|
||
|
||
1. **Аутентификация** - проверка подлинности сервисов
|
||
2. **Авторизация** - контроль доступа к ресурсам
|
||
3. **Шифрование** - защита данных в транзите
|
||
4. **Мониторинг** - отслеживание подозрительной активности
|
||
5. **Аудит** - логирование всех операций
|
||
6. **Rate Limiting** - защита от злоупотреблений
|
||
7. **Circuit Breaker** - устойчивость к сбоям
|
||
|
||
TVM и mTLS являются ключевыми технологиями для обеспечения безопасности в микросервисной архитектуре.
|