chore: initialize tuhui repository

backend/app/core/security.py

@@ -0,0 +1,54 @@
+from datetime import datetime, timedelta
+from typing import Optional
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from .config import settings
+import hashlib
+
+# 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
+pwd_context = CryptContext(
+    schemes=["bcrypt"],
+    deprecated="auto",
+    bcrypt__ident="2b",  # 使用2b版本，跳过wrap bug检测
+)
+
+def _truncate_password(password: str) -> str:
+    """
+    截断密码以适应bcrypt的72字节限制
+    对于超长密码，使用SHA256哈希确保唯一性
+    """
+    password_bytes = password.encode('utf-8')
+    if len(password_bytes) <= 72:
+        return password
+    # 对超长密码进行hash，确保唯一性且在72字节以内
+    return hashlib.sha256(password_bytes).hexdigest()
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """验证密码"""
+    safe_password = _truncate_password(plain_password)
+    return pwd_context.verify(safe_password, hashed_password)
+
+def get_password_hash(password: str) -> str:
+    """加密密码（bcrypt限制最多72字节）"""
+    safe_password = _truncate_password(password)
+    return pwd_context.hash(safe_password)
+
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
+    """创建 JWT Token"""
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
+    
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
+    return encoded_jwt
+
+def decode_access_token(token: str) -> Optional[dict]:
+    """解析 JWT Token"""
+    try:
+        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
+        return payload
+    except JWTError:
+        return None