72 lines
2.6 KiB
Python
72 lines
2.6 KiB
Python
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"""安全模块 — JWT Token 生成与验证（双 Token 架构）"""
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from datetime import timedelta
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from app.core.config import settings
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from app.core.time_utils import get_beijing_time
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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ALGORITHM = "HS256"
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# Token 类型声明
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TOKEN_TYPE_ACCESS = "access"
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TOKEN_TYPE_REFRESH = "refresh"
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def create_access_token(data: dict, expires_delta: timedelta | None = None) -> str:
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"""生成 JWT Access Token（2 小时有效）"""
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to_encode = data.copy()
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expire = get_beijing_time() + (
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expires_delta or timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
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)
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to_encode.update({"exp": expire, "type": TOKEN_TYPE_ACCESS})
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return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)
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def create_refresh_token(data: dict, expires_delta: timedelta | None = None) -> str:
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"""生成 JWT Refresh Token（7 天有效，仅用于刷新 Access Token）"""
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to_encode = data.copy()
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expire = get_beijing_time() + (
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expires_delta or timedelta(days=settings.REFRESH_TOKEN_EXPIRE_DAYS)
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)
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to_encode.update({"exp": expire, "type": TOKEN_TYPE_REFRESH})
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return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)
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def decode_token(token: str) -> dict:
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"""解码并验证 JWT Token，返回 payload"""
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return jwt.decode(token, settings.SECRET_KEY, algorithms=[ALGORITHM])
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def peek_token_identity(token: str) -> dict | None:
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"""读出令牌里的用户身份 —— **仅供审计标注，绝不可用于授权**。
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与 decode_token 的唯一区别：**关闭过期校验**。
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为什么需要它：刷新令牌接口正是"access token 过期了才来"的场景，
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请求里不带 Authorization 头，JWT 依赖根本不执行，审计只能记成
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「未认证」—— 而"谁在什么时候尝试刷新"恰恰是该留痕的信息。
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签名校验照常进行，伪造的令牌解不出任何东西。
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⚠️ 返回值只允许写进 request.state 的审计字段；
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任何鉴权判断一律走 get_current_user，不要用本函数。
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"""
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try:
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return jwt.decode(
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token, settings.SECRET_KEY, algorithms=[ALGORITHM],
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options={"verify_exp": False},
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)
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except JWTError:
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return None
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""验证明文密码 vs 哈希密码"""
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return pwd_context.verify(plain_password, hashed_password)
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def hash_password(password: str) -> str:
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"""对明文密码进行哈希"""
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return pwd_context.hash(password)
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