waiwaylee
5af69d694f
- 后端：新增 /api/clips（列表/新建）、/api/clips/<id>（取全文/删除）、/api/clips/<id>/copy（复制计数），列表仅返回 240 字符预览 - 存储：SQLite 新增 clips 表（含 expires_at 索引），启动自动建表，线上老库无需手工迁移 - 前端：剪贴板卡片支持读取本机剪贴板、来源备注、查看全文、一键复制到本机剪贴板、单条删除与复制次数 - 清理：systemd 定时任务与 /api/cleanup 同时清理过期剪贴板 - 配置：新增 max_clip_length / max_clips / clip_default_expires_hours - 部署：deploy_transfer.py 新增 --keep-credentials（不重置登录密码与会话密钥）与 SSH 连接重试 - 文档：README / setup.md / CHANGELOG 同步更新
106 lines
3.8 KiB
Python
106 lines
3.8 KiB
Python
"""认证、配置加载与登录限流工具（仅依赖标准库）。"""
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import base64
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import hashlib
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import hmac
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import json
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import os
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import secrets
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import threading
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import time
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DEFAULT_CONFIG_PATH = os.environ.get("LZWLAB_TRANSFER_CONFIG", "/etc/lzwlab-transfer/config.json")
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_SCRYPT_N = 2 ** 14
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_SCRYPT_R = 8
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_SCRYPT_P = 1
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def _b64encode(raw: bytes) -> str:
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return base64.urlsafe_b64encode(raw).decode("ascii").rstrip("=")
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def _b64decode(text: str) -> bytes:
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return base64.urlsafe_b64decode(text + "=" * (-len(text) % 4))
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def hash_password(password: str) -> str:
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"""返回 scrypt 密码哈希，格式：scrypt$N$r$p$salt_b64$hash_b64"""
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if not isinstance(password, str) or not password:
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raise ValueError("密码不能为空")
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salt = secrets.token_bytes(16)
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digest = hashlib.scrypt(
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password.encode("utf-8"), salt=salt, n=_SCRYPT_N, r=_SCRYPT_R, p=_SCRYPT_P, dklen=32
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)
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return "scrypt$%d$%d$%d$%s$%s" % (
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_SCRYPT_N, _SCRYPT_R, _SCRYPT_P, _b64encode(salt), _b64encode(digest)
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)
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def verify_password(password: str, stored: str) -> bool:
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try:
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parts = stored.split("$")
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if len(parts) != 6 or parts[0] != "scrypt":
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return False
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_, n_s, r_s, p_s, salt_s, digest_s = parts
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n, r, p = int(n_s), int(r_s), int(p_s)
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digest = hashlib.scrypt(
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password.encode("utf-8"), salt=_b64decode(salt_s), n=n, r=r, p=p, dklen=32
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)
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return hmac.compare_digest(digest, _b64decode(digest_s))
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except Exception:
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return False
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def load_config(path: str | None = None) -> dict:
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path = path or DEFAULT_CONFIG_PATH
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if not os.path.exists(path):
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raise RuntimeError("配置文件不存在：%s" % path)
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with open(path, "r", encoding="utf-8") as fh:
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cfg = json.load(fh)
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if not isinstance(cfg.get("users"), dict) or not cfg["users"]:
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raise RuntimeError("配置缺少 users")
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if not cfg.get("secret_key") or len(str(cfg["secret_key"])) < 32:
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raise RuntimeError("配置缺少 secret_key（至少 32 字符）")
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data_dir = cfg.get("data_dir", "/var/lib/lzwlab-transfer")
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cfg["files_dir"] = os.path.join(data_dir, "files")
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cfg["database_path"] = cfg.get("database_path", os.path.join(data_dir, "files.db"))
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cfg["max_content_length"] = int(cfg.get("max_content_length", 5 * 1024 ** 3))
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cfg["cookie_secure"] = bool(cfg.get("cookie_secure", True))
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cfg["session_days"] = int(cfg.get("session_days", 7))
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# 剪贴板：单条文本上限（字符）、保留条数上限、默认有效期（小时）
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cfg["max_clip_length"] = int(cfg.get("max_clip_length", 256 * 1024))
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cfg["max_clips"] = int(cfg.get("max_clips", 200))
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cfg["clip_default_expires_hours"] = int(cfg.get("clip_default_expires_hours", 24))
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return cfg
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def random_secret() -> str:
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return secrets.token_urlsafe(48)
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class RateLimiter:
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"""基于内存的按 IP 登录失败限流。"""
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def __init__(self, max_failures: int = 10, window_seconds: int = 900):
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self.max_failures = max_failures
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self.window_seconds = window_seconds
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self._lock = threading.Lock()
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self._failures: dict[str, list[float]] = {}
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def _prune(self, ip: str, now: float) -> None:
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self._failures[ip] = [t for t in self._failures.get(ip, []) if now - t < self.window_seconds]
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def is_blocked(self, ip: str) -> bool:
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with self._lock:
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self._prune(ip, time.monotonic())
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return len(self._failures.get(ip, [])) >= self.max_failures
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def record_failure(self, ip: str) -> None:
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with self._lock:
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self._failures.setdefault(ip, []).append(time.monotonic())
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self._prune(ip, time.monotonic())
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def reset(self, ip: str) -> None:
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with self._lock:
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self._failures.pop(ip, None)
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