kin: BATON-BIZ-001-backend_dev

backend/config.py

@@ -26,3 +26,5 @@ ADMIN_CHAT_ID: str = _require("ADMIN_CHAT_ID")
 VAPID_PRIVATE_KEY: str = os.getenv("VAPID_PRIVATE_KEY", "")
 VAPID_PUBLIC_KEY: str = os.getenv("VAPID_PUBLIC_KEY", "")
 VAPID_CLAIMS_EMAIL: str = os.getenv("VAPID_CLAIMS_EMAIL", "")
+JWT_SECRET: str = os.getenv("JWT_SECRET", "")
+JWT_TOKEN_EXPIRE_SECONDS: int = int(os.getenv("JWT_TOKEN_EXPIRE_SECONDS", "2592000"))  # 30 days

backend/db.py

@@ -352,6 +352,30 @@ async def update_registration_status(reg_id: int, status: str) -> bool:
     return changed
 
 
+async def get_registration_by_login_or_email(login_or_email: str) -> Optional[dict]:
+    async with _get_conn() as conn:
+        async with conn.execute(
+            """
+            SELECT id, email, login, password_hash, status, push_subscription, created_at
+            FROM registrations
+            WHERE login = ? OR email = ?
+            """,
+            (login_or_email, login_or_email),
+        ) as cur:
+            row = await cur.fetchone()
+    if row is None:
+        return None
+    return {
+        "id": row["id"],
+        "email": row["email"],
+        "login": row["login"],
+        "password_hash": row["password_hash"],
+        "status": row["status"],
+        "push_subscription": row["push_subscription"],
+        "created_at": row["created_at"],
+    }
+
+
 async def save_telegram_batch(
     message_text: str,
     signals_count: int,

backend/main.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import asyncio
 import hashlib
+import hmac
 import logging
 import os
 import secrets
@@ -16,11 +17,21 @@ from fastapi.responses import JSONResponse
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
 
 from backend import config, db, push, telegram
-from backend.middleware import rate_limit_auth_register, rate_limit_register, rate_limit_signal, verify_admin_token, verify_webhook_secret
+from backend.middleware import (
+    create_auth_token,
+    rate_limit_auth_login,
+    rate_limit_auth_register,
+    rate_limit_register,
+    rate_limit_signal,
+    verify_admin_token,
+    verify_webhook_secret,
+)
 from backend.models import (
     AdminBlockRequest,
     AdminCreateUserRequest,
     AdminSetPasswordRequest,
+    AuthLoginRequest,
+    AuthLoginResponse,
     AuthRegisterRequest,
     AuthRegisterResponse,
     RegisterRequest,
@@ -51,6 +62,18 @@ def _hash_password(password: str) -> str:
     dk = hashlib.pbkdf2_hmac("sha256", password.encode("utf-8"), salt, 260_000)
     return f"{salt.hex()}:{dk.hex()}"
 
+def _verify_password(password: str, stored_hash: str) -> bool:
+    """Verify a password against a stored PBKDF2-HMAC-SHA256 hash (salt_hex:dk_hex)."""
+    try:
+        salt_hex, dk_hex = stored_hash.split(":", 1)
+        salt = bytes.fromhex(salt_hex)
+        expected_dk = bytes.fromhex(dk_hex)
+        actual_dk = hashlib.pbkdf2_hmac("sha256", password.encode("utf-8"), salt, 260_000)
+        return hmac.compare_digest(actual_dk, expected_dk)
+    except Exception:
+        return False
+
+
 # aggregator = telegram.SignalAggregator(interval=10)  # v2.0 feature — отключено в v1 (ADR-004)
 
 _KEEPALIVE_INTERVAL = 600  # 10 минут
@@ -225,6 +248,24 @@ async def auth_register(
     return AuthRegisterResponse(status="pending", message="Заявка отправлена на рассмотрение")
 
 
+@app.post("/api/auth/login", response_model=AuthLoginResponse)
+async def auth_login(
+    body: AuthLoginRequest,
+    _: None = Depends(rate_limit_auth_login),
+) -> AuthLoginResponse:
+    reg = await db.get_registration_by_login_or_email(body.login_or_email)
+    if reg is None or not _verify_password(body.password, reg["password_hash"]):
+        raise HTTPException(status_code=401, detail="Неверный логин или пароль")
+    if reg["status"] == "pending":
+        raise HTTPException(status_code=403, detail="Ваша заявка ожидает рассмотрения")
+    if reg["status"] == "rejected":
+        raise HTTPException(status_code=403, detail="Ваша заявка отклонена")
+    if reg["status"] != "approved":
+        raise HTTPException(status_code=403, detail="Доступ запрещён")
+    token = create_auth_token(reg["id"], reg["login"])
+    return AuthLoginResponse(token=token, login=reg["login"])
+
+
 async def _handle_callback_query(cb: dict) -> None:
     """Process approve/reject callback from admin Telegram inline buttons."""
     data = cb.get("data", "")

backend/middleware.py

@@ -1,6 +1,11 @@
 from __future__ import annotations
 
+import base64
+import hashlib
+import hmac
+import json
 import secrets
+import time
 from typing import Optional
 
 from fastapi import Depends, Header, HTTPException, Request
@@ -8,6 +13,12 @@ from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
 
 from backend import config, db
 
+# JWT secret: stable across restarts if JWT_SECRET env var is set; random per-process otherwise
+_JWT_SECRET: str = config.JWT_SECRET or secrets.token_hex(32)
+_JWT_HEADER_B64: str = (
+    base64.urlsafe_b64encode(b'{"alg":"HS256","typ":"JWT"}').rstrip(b"=").decode()
+)
+
 _bearer = HTTPBearer(auto_error=False)
 
 _RATE_LIMIT = 5
@@ -65,3 +76,74 @@ async def rate_limit_auth_register(request: Request) -> None:
     count = await db.rate_limit_increment(key, _AUTH_REGISTER_RATE_WINDOW)
     if count > _AUTH_REGISTER_RATE_LIMIT:
         raise HTTPException(status_code=429, detail="Too Many Requests")
+
+
+_AUTH_LOGIN_RATE_LIMIT = 5
+_AUTH_LOGIN_RATE_WINDOW = 900  # 15 minutes
+
+
+def _b64url_encode(data: bytes) -> str:
+    return base64.urlsafe_b64encode(data).rstrip(b"=").decode()
+
+
+def _b64url_decode(s: str) -> bytes:
+    padding = 4 - len(s) % 4
+    if padding != 4:
+        s += "=" * padding
+    return base64.urlsafe_b64decode(s)
+
+
+def create_auth_token(reg_id: int, login: str) -> str:
+    """Create a signed HS256 JWT for an approved registration."""
+    now = int(time.time())
+    payload = {
+        "sub": str(reg_id),
+        "login": login,
+        "iat": now,
+        "exp": now + config.JWT_TOKEN_EXPIRE_SECONDS,
+    }
+    payload_b64 = _b64url_encode(json.dumps(payload, separators=(",", ":")).encode())
+    signing_input = f"{_JWT_HEADER_B64}.{payload_b64}"
+    sig = hmac.new(
+        _JWT_SECRET.encode(), signing_input.encode(), hashlib.sha256
+    ).digest()
+    return f"{signing_input}.{_b64url_encode(sig)}"
+
+
+def _verify_jwt_token(token: str) -> dict:
+    """Verify token signature and expiry. Returns payload dict on success."""
+    parts = token.split(".")
+    if len(parts) != 3:
+        raise ValueError("Invalid token format")
+    header_b64, payload_b64, sig_b64 = parts
+    signing_input = f"{header_b64}.{payload_b64}"
+    expected_sig = hmac.new(
+        _JWT_SECRET.encode(), signing_input.encode(), hashlib.sha256
+    ).digest()
+    actual_sig = _b64url_decode(sig_b64)
+    if not hmac.compare_digest(expected_sig, actual_sig):
+        raise ValueError("Invalid signature")
+    payload = json.loads(_b64url_decode(payload_b64))
+    if payload.get("exp", 0) < time.time():
+        raise ValueError("Token expired")
+    return payload
+
+
+async def rate_limit_auth_login(request: Request) -> None:
+    key = f"login:{_get_client_ip(request)}"
+    count = await db.rate_limit_increment(key, _AUTH_LOGIN_RATE_WINDOW)
+    if count > _AUTH_LOGIN_RATE_LIMIT:
+        raise HTTPException(status_code=429, detail="Too Many Requests")
+
+
+async def verify_auth_token(
+    credentials: Optional[HTTPAuthorizationCredentials] = Depends(_bearer),
+) -> dict:
+    """Dependency for protected endpoints — verifies Bearer JWT, returns payload."""
+    if credentials is None:
+        raise HTTPException(status_code=401, detail="Unauthorized")
+    try:
+        payload = _verify_jwt_token(credentials.credentials)
+    except Exception:
+        raise HTTPException(status_code=401, detail="Unauthorized")
+    return payload

backend/models.py

@@ -66,3 +66,13 @@ class AuthRegisterRequest(BaseModel):
 class AuthRegisterResponse(BaseModel):
     status: str
     message: str
+
+
+class AuthLoginRequest(BaseModel):
+    login_or_email: str = Field(..., min_length=1, max_length=255)
+    password: str = Field(..., min_length=1, max_length=128)
+
+
+class AuthLoginResponse(BaseModel):
+    token: str
+    login: str