feat(api): password login, sliding renewal, revocable sessions

- POST /v1/auth/password|refresh|logout per contract operationIds;
  long-lived single token (32B hex, DB stores sha256 only), sliding
  renewal without rotation, logout sets sessions.revokedAt.
- SessionGuard: Bearer -> session -> user eligibility (disabled/locked/
  pending revoke access); all failures map to 401 AUTH_TOKEN_EXPIRED.
- Anti-enumeration: unknown account / wrong password / status-blocked
  share one 401 AUTH_INVALID_CREDENTIALS; unknown-account path runs a
  dummy argon2 verify to equalize timing.
- Login rate limiting (P1): in-memory account+IP sliding window,
  5 failures / 15 min -> 429; success clears. Contract amendment
  (registered): new ErrorCodes.AUTH_RATE_LIMITED added to errors.ts +
  openapi Error enum + 429 response on /auth/password; generated types
  regenerated and committed. P1a single-instance limiter; P5 needs a
  Redis-backed implementation.
- Global ValidationPipe (APP_PIPE) enforces class-validator DTOs ->
  400 VALIDATION_FAILED via the existing exception filter.

Co-Authored-By: Claude Code <noreply@anthropic.com>
This commit is contained in:
浅念
2026-09-17 21:17:16 +08:00
parent 368b1d5b47
commit 39cae26106
12 changed files with 803 additions and 26 deletions
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// services/api/src/auth/auth.service.ts —— 登录 / 滑动续期 / 注销核心逻辑(Task 13)。
// 会话模型:长效单令牌 + 滑动续期(用户决策 2026-09-17,不做 access/refresh 双层)。
// 令牌 = 32B randomBytes hex(仅登录响应出现一次);库内只存 sha256(token)。
// 安全要点:
// · 防账号枚举——账号不存在 / 密码错误 / 状态不合格(停用、锁定、待激活)三者
// 返回同一 401 AUTH_INVALID_CREDENTIALS 且同文案;账号不存在时也跑一次等代价
// argon2 verify(dummy hash)拉平时延,杜绝「响应快慢」侧信道。
// · 登录失败限速(总纲 P1)——account+IP 维度、15 分钟窗口、5 次失败锁定,
// 成功登录清零。进程内存实现:P1a 单实例足够;P5 多实例需换 Redis 后端限速器
// (本类私有接口不变,替换实现即可)。
// · 审计——登录成功写 audit_logs(action='auth.login', actor=用户);
// 注销不写审计(会话行 revokedAt 本身即持久的注销凭据)。
import { randomBytes } from 'node:crypto';
import { HttpStatus, Injectable } from '@nestjs/common';
import { ErrorCodes } from '@photo/contracts';
import { ApiException } from '../api-exception';
import { PrismaService } from '../prisma/prisma.service';
import { hashPassword, verifyPassword } from './password';
import { hashSessionToken } from './session.guard';
/** 契约默认 30 天(.env AUTH_SESSION_TTL_SECONDS 同名可调)。 */
const DEFAULT_SESSION_TTL_SECONDS = 2_592_000;
const LOGIN_RATE_LIMIT_MAX_FAILURES = 5;
const LOGIN_RATE_LIMIT_WINDOW_MS = 15 * 60 * 1000;
function invalidCredentials(): ApiException {
return new ApiException(
ErrorCodes.AUTH_INVALID_CREDENTIALS,
'Invalid account or password',
HttpStatus.UNAUTHORIZED,
);
}
// 惰性生成一次 dummy argon2 哈希并复用:账号不存在路径用它跑等代价 verify。
// 选「首用时生成」而非内嵌常量:参数始终跟随 hashPassword 当前默认,不会因
// 升级 argon2 参数而漂移成不等价时延。
let dummyHashPromise: Promise<string> | undefined;
function dummyHash(): Promise<string> {
dummyHashPromise ??= hashPassword(randomBytes(32).toString('hex'));
return dummyHashPromise;
}
/** 进程内滑动窗口失败计数器(account+IP 维度)。 */
class InMemoryLoginRateLimiter {
private readonly buckets = new Map<string, { count: number; windowStart: number }>();
constructor(
private readonly maxFailures: number,
private readonly windowMs: number,
) {}
/** 窗口期内失败次数达到阈值即锁定;窗口过期顺手淘汰条目,Map 不无界增长。 */
isLocked(key: string): boolean {
const bucket = this.buckets.get(key);
if (bucket === undefined) {
return false;
}
if (Date.now() - bucket.windowStart >= this.windowMs) {
this.buckets.delete(key);
return false;
}
return bucket.count >= this.maxFailures;
}
recordFailure(key: string): void {
const now = Date.now();
const bucket = this.buckets.get(key);
if (bucket === undefined || now - bucket.windowStart >= this.windowMs) {
this.buckets.set(key, { count: 1, windowStart: now });
return;
}
bucket.count += 1;
}
clear(key: string): void {
this.buckets.delete(key);
}
}
export interface LoginResult {
sessionToken: string;
expiresAt: string;
}
export interface RenewalResult {
expiresAt: string;
}
@Injectable()
export class AuthService {
private readonly sessionTtlSeconds: number;
private readonly rateLimiter = new InMemoryLoginRateLimiter(
LOGIN_RATE_LIMIT_MAX_FAILURES,
LOGIN_RATE_LIMIT_WINDOW_MS,
);
constructor(private readonly prisma: PrismaService) {
const raw = Number.parseInt(
process.env.AUTH_SESSION_TTL_SECONDS ?? '',
10,
);
this.sessionTtlSeconds =
Number.isFinite(raw) && raw > 0 ? raw : DEFAULT_SESSION_TTL_SECONDS;
}
async login(
account: string,
plainPassword: string,
ip: string,
): Promise<LoginResult> {
// ① 限速先行:锁定期内不触 DB、不跑 argon2(即便密码正确也 429,
// 防止用「锁定与否」探测密码正确性)。
const rateKey = `${account}|${ip}`;
if (this.rateLimiter.isLocked(rateKey)) {
throw new ApiException(
ErrorCodes.AUTH_RATE_LIMITED,
'Too many failed login attempts; try again later',
HttpStatus.TOO_MANY_REQUESTS,
);
}
// ② 查用户:不存在 → dummy verify 拉平时延后与密码错误同响应。
const user = await this.prisma.users.findUnique({ where: { account } });
if (user === null) {
await verifyPassword(await dummyHash(), plainPassword);
this.rateLimiter.recordFailure(rateKey);
throw invalidCredentials();
}
// ③ 先验密码再查状态:状态不合格与密码错误同样不可区分(同 401 同文案;
// argon2 在两条路径都真实跑过,时延也一致)。
if (!(await verifyPassword(user.passwordHash, plainPassword))) {
this.rateLimiter.recordFailure(rateKey);
throw invalidCredentials();
}
if (
user.sourceStatus === 'disabled' ||
user.localLocked ||
user.credentialStatus !== 'active'
) {
// 密码已证实正确——不属于凭据猜测,不计入限速(限速针对撞库,
// 停用/待激活账号本就无法登录,计数无防护收益)。
throw invalidCredentials();
}
// ④ 签发会话:明文令牌仅本次返回;库存 sha256,expiresAt=now+TTL。
const sessionToken = randomBytes(32).toString('hex');
const session = await this.prisma.sessions.create({
data: {
userId: user.id,
tokenHash: hashSessionToken(sessionToken),
expiresAt: new Date(Date.now() + this.sessionTtlSeconds * 1000),
},
});
this.rateLimiter.clear(rateKey);
// ⑤ 审计(resourceId=会话 id:登录动作产出的资源即会话)。
await this.prisma.audit_logs.create({
data: {
actorId: user.id,
action: 'auth.login',
resourceId: session.id,
metadata: { ip },
},
});
return {
sessionToken,
expiresAt: session.expiresAt.toISOString(),
};
}
/**
* 滑动续期:同一令牌不轮换(会话行只前移 expiresAt)。
* 守卫已校验有效性;此处仍防御性复核(守卫与更新之间存在微小窗口,
* 且未来其它调用方可能绕过守卫)。
*/
async refresh(sessionId: string): Promise<RenewalResult> {
const session = await this.prisma.sessions.findUnique({
where: { id: sessionId },
});
if (
session === null ||
session.revokedAt !== null ||
session.expiresAt.getTime() <= Date.now()
) {
throw new ApiException(
ErrorCodes.AUTH_TOKEN_EXPIRED,
'Session token is missing, invalid, or expired',
HttpStatus.UNAUTHORIZED,
);
}
const expiresAt = new Date(Date.now() + this.sessionTtlSeconds * 1000);
await this.prisma.sessions.update({
where: { id: sessionId },
data: { expiresAt },
});
return { expiresAt: expiresAt.toISOString() };
}
/** 注销:置 revokedAt;幂等(updateMany 只在尚未撤销时落时间戳)。 */
async logout(sessionId: string): Promise<void> {
await this.prisma.sessions.updateMany({
where: { id: sessionId, revokedAt: null },
data: { revokedAt: new Date() },
});
}
}