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63 lines
1.7 KiB
63 lines
1.7 KiB
"""Service to handle authentication."""
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import re
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from typing import Optional
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from nacl import pwhash
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from nacl.exceptions import InvalidkeyError
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from server import errors
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from server.model import User, UserToken
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from server.service import user_token_service
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def validate_password_strength(proposed_password: str) -> str:
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"""Validate that a password meets minimum strength requirements."""
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# calculating the length
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length_error = len(proposed_password) < 8
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# searching for digits
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digit_error = re.search(r"\d", proposed_password) is None
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# searching for uppercase
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uppercase_error = re.search(r"[A-Z]", proposed_password) is None
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# searching for lowercase
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lowercase_error = re.search(r"[a-z]", proposed_password) is None
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if length_error or digit_error or uppercase_error or lowercase_error:
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raise errors.ValidationError(
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' '.join(['The password must be at least 8 characters long.',
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'Contain one or more digits,',
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'one or more uppercase characters,',
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'and one or more lowercase characters']))
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return proposed_password
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def is_valid_password(user: User, password: str) -> bool:
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"""
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User password must pass pwhash verify.
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:param user:
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:param password:
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:return:
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"""
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assert user
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try:
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return pwhash.verify(
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user.password_hash.encode('utf8'), password.encode('utf8'))
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except InvalidkeyError:
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pass
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return False
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def logout(user_token: Optional[UserToken] = None) -> None:
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"""
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Remove a user_token associated with a client session.
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:param user_token:
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:return:
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"""
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if user_token is not None:
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user_token_service.delete(user_token)
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