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xiaoxia-saas/packages/application/auth/password_handler.py
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2026-06-30 17:23:08 +08:00

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"""
密码处理器委托层
此模块作为 Domain 层 (packages.domain.auth.password_hasher) 和 Application 层之间的委托层,
隔离 Domain 层对 bcrypt 库的直接依赖。
使用方式:
from packages.application.auth.password_handler import PasswordHandler, get_password_handler
password_handler = PasswordHandler()
hashed = password_handler.hash_password("my_secure_password")
is_valid = password_handler.verify_password("my_secure_password", hashed)
"""
from typing import Optional, Tuple
from packages.application.auth.password_hasher import PasswordHasher, PasswordValidator
class PasswordHandler:
"""
密码处理器委托类
委托给 packages.domain.auth.password_hasher 进行实际的密码哈希操作,
此层仅负责配置和封装,不直接依赖 bcrypt 库。
"""
def __init__(self, rounds: int = 12):
"""
初始化密码处理器
Args:
rounds: bcrypt cost factor(默认 12,推荐范围 10-14
"""
self._hasher = PasswordHasher(rounds=rounds)
self._validator = PasswordValidator(
min_length=8,
require_uppercase=True,
require_lowercase=True,
require_digit=True,
require_special=False,
)
def hash_password(self, password: str) -> str:
"""
哈希密码
Args:
password: 明文密码
Returns:
bcrypt 哈希字符串
Raises:
ValueError: 密码为空
"""
return self._hasher.hash_password(password)
def verify_password(self, password: str, hashed_password: str) -> bool:
"""
验证密码
Args:
password: 明文密码
hashed_password: 存储的哈希密码
Returns:
True 如果密码正确,否则 False
"""
return self._hasher.verify_password(password, hashed_password)
def needs_rehash(self, hashed_password: str) -> bool:
"""
检查哈希是否需要重新计算
Args:
hashed_password: 存储的哈希密码
Returns:
True 如果需要重新哈希
"""
return self._hasher.needs_rehash(hashed_password)
def validate_strength(self, password: str) -> Tuple[bool, Optional[str]]:
"""
验证密码强度
Args:
password: 明文密码
Returns:
(是否有效, 错误信息)
"""
return self._validator.validate(password)
# 默认处理器实例
_default_handler: Optional[PasswordHandler] = None
def configure_password_handler(rounds: int = 12) -> PasswordHandler:
"""
配置全局密码处理器
Args:
rounds: bcrypt cost factor
Returns:
配置好的 PasswordHandler 实例
"""
global _default_handler
_default_handler = PasswordHandler(rounds=rounds)
return _default_handler
def get_password_handler() -> PasswordHandler:
"""
获取全局密码处理器
Returns:
PasswordHandler 实例
"""
global _default_handler
if _default_handler is None:
_default_handler = PasswordHandler()
return _default_handler