55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
from datetime import datetime, timedelta
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from typing import Optional
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from .config import settings
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import hashlib
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# 密码加密上下文 - 禁用bcrypt的wrap bug检测以避免72字节限制错误
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pwd_context = CryptContext(
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schemes=["bcrypt"],
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deprecated="auto",
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bcrypt__ident="2b", # 使用2b版本，跳过wrap bug检测
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)
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def _truncate_password(password: str) -> str:
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"""
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截断密码以适应bcrypt的72字节限制
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对于超长密码，使用SHA256哈希确保唯一性
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"""
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password_bytes = password.encode('utf-8')
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if len(password_bytes) <= 72:
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return password
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# 对超长密码进行hash，确保唯一性且在72字节以内
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return hashlib.sha256(password_bytes).hexdigest()
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""验证密码"""
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safe_password = _truncate_password(plain_password)
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return pwd_context.verify(safe_password, hashed_password)
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def get_password_hash(password: str) -> str:
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"""加密密码（bcrypt限制最多72字节）"""
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safe_password = _truncate_password(password)
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return pwd_context.hash(safe_password)
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
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"""创建 JWT Token"""
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.utcnow() + expires_delta
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else:
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expire = datetime.utcnow() + timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
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return encoded_jwt
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def decode_access_token(token: str) -> Optional[dict]:
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"""解析 JWT Token"""
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try:
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payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
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return payload
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except JWTError:
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return None
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