moxiaonian
d9da4301cd
副本编号 LY-20261007-AC63（水印指纹已嵌入） 含 README、.gitignore；排除 .DS_Store / __pycache__ / .pytest_cache
104 lines
3.7 KiB
Python
104 lines
3.7 KiB
Python
"""软授权锁（防君子不防小人）。
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总开关就是下面的 `_ENABLED` 一行变量：置 False 则完全放行。
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本锁只是授权边界的可见表达，真正的约束在 LICENSE.md 的法律条款——
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绕过、篡改、移除软锁或水印，即构成对授权的违反。
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母版（技能开发目录）无 `data/.license.json`，本模块全部放行；
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由 `tools/make_license_copy.py` 生成的定制副本带该状态文件，
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按剩余次数与到期日限制使用，并以签名防止手工篡改状态文件。
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退出码 4 = 授权不可用（次数用尽 / 已过期 / 状态文件被篡改）。
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"""
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from __future__ import annotations
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import hashlib
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import json
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from datetime import date
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from pathlib import Path
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_ENABLED = True # 软锁总开关：False = 完全放行
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_SALT = "lingyao-miaojie-ziping-eightchar"
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_COMPANY = "四川灵爻妙解文化传播有限公司"
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STATE_REL = Path("data") / ".license.json"
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def _state_path(root: Path) -> Path:
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return root / STATE_REL
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def _sig(st: dict) -> str:
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raw = "|".join([
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str(st["copy_id"]), str(st["licensee"]), str(st["max_uses"]),
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str(st["remaining_uses"]), str(st["expires_at"]), _SALT,
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])
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return hashlib.sha256(raw.encode("utf-8")).hexdigest()[:16]
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def _load(root: Path) -> dict | None:
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p = _state_path(root)
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if not p.is_file():
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return None
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try:
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return json.loads(p.read_text(encoding="utf-8"))
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except (OSError, json.JSONDecodeError):
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# 状态文件损坏按篡改变体处理：拒跑
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return {"copy_id": "?", "licensee": "?", "remaining_uses": 0,
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"max_uses": 0, "expires_at": None, "sig": ""}
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def _deny(reason: str, st: dict) -> str:
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return (f"授权不可用：{reason}。"
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f"（副本编号 {st.get('copy_id', '?')}，授权对象：{st.get('licensee', '?')}）"
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f"本技能为测试授权副本，禁止商业用途与个人传播；"
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f"如需续期或正式授权，请联系{_COMPANY}。")
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def check(root: Path) -> str | None:
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"""返回 None 表示放行；返回字符串表示拒跑原因（由调用方打印到 stderr，退出码 4）。"""
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if not _ENABLED:
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return None
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st = _load(root)
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if st is None:
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return None # 母版无状态文件，不锁
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if st.get("sig") != _sig(st):
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return _deny("授权状态校验失败（授权文件被改动过）", st)
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exp = st.get("expires_at")
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if exp and date.today() > date.fromisoformat(exp):
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return _deny(f"授权已于 {exp} 到期", st)
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if st.get("remaining_uses", 0) <= 0:
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return _deny("本副本的使用次数已用尽", st)
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return None
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def consume(root: Path) -> None:
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"""成功排盘一次后扣减一次。仅在 check 放行后调用。"""
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if not _ENABLED:
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return
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st = _load(root)
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if st is None:
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return
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st["remaining_uses"] = max(0, int(st.get("remaining_uses", 0)) - 1)
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st["sig"] = _sig(st)
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_state_path(root).write_text(
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json.dumps(st, ensure_ascii=False, indent=2), encoding="utf-8")
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def write_state(root: Path, *, copy_id: str, licensee: str,
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max_uses: int, expires_at: str | None = None) -> dict:
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"""生成授权状态文件（供 tools/make_license_copy.py 调用，签名算法单点在此）。"""
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st = {
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"copy_id": copy_id,
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"licensee": licensee,
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"issued_at": date.today().isoformat(),
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"expires_at": expires_at,
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"max_uses": max_uses,
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"remaining_uses": max_uses,
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}
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st["sig"] = _sig(st)
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p = _state_path(root)
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p.parent.mkdir(parents=True, exist_ok=True)
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p.write_text(json.dumps(st, ensure_ascii=False, indent=2), encoding="utf-8")
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return st
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