102 lines
4.1 KiB
Python
102 lines
4.1 KiB
Python
from uuid import UUID, uuid4
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from pydantic import BaseModel
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from src.customer import Customer
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from src.models import NKodePolicy, KeypadSize
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from src.user import User
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from src.user_cipher_keys import UserCipherKeys
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from src.user_signup_session import UserSignupSession
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from src.user_interface import UserInterface
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from src.customer_interface import CustomerInterface
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class NKodeAPI(BaseModel):
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customers: dict[UUID, Customer] = {}
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signup_sessions: dict[UUID, UserSignupSession] = {}
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def create_new_customer(self, keypad_size: KeypadSize, nkode_policy: NKodePolicy) -> UUID:
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new_customer = Customer(
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customer_id=uuid4(),
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interface=CustomerInterface.new(keypad_size),
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users={},
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nkode_policy=nkode_policy
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)
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self.customers[new_customer.customer_id] = new_customer
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return new_customer.customer_id
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def generate_index_interface(self, customer_id: UUID) -> tuple[UUID, list[int]]:
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assert (customer_id in self.customers.keys())
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customer = self.customers[customer_id]
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set_interface = UserInterface.new(customer.interface.keypad_size)
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new_session = UserSignupSession(
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session_id=uuid4(),
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set_interface=set_interface.attr_indices,
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customer_id=customer_id,
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keypad_size=customer.interface.keypad_size,
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)
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self.signup_sessions[new_session.session_id] = new_session
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return new_session.session_id, new_session.set_interface
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def set_nkode(
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self, username: str,
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customer_id: UUID,
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key_selection: list[int],
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session_id: UUID
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) -> list[int]:
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assert (customer_id in self.customers.keys())
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customer = self.customers[customer_id]
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assert (username not in customer.users.keys())
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assert (session_id in self.signup_sessions.keys())
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self.signup_sessions[session_id].set_user_nkode(username, key_selection)
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return self.signup_sessions[session_id].confirm_interface
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def confirm_nkode(self, username: str, customer_id: UUID, confirm_key_entry: list[int], session_id: UUID) -> bool:
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assert (
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session_id in self.signup_sessions.keys() and
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customer_id == self.signup_sessions[session_id].customer_id and
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username == self.signup_sessions[session_id].username
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)
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customer = self.customers[customer_id]
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passcode = self.signup_sessions[session_id].deduce_passcode(confirm_key_entry)
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new_user_keys = UserCipherKeys.new(
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customer.interface.keypad_size,
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customer.interface.set_vals,
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customer.nkode_policy.max_nkode_len
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)
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enciphered_passcode = new_user_keys.encipher_nkode(passcode, customer.interface)
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new_user = User(
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username=username,
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enciphered_passcode=enciphered_passcode,
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user_keys=new_user_keys,
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user_interface=UserInterface(
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attr_indices=self.signup_sessions[session_id].confirm_interface,
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keypad_size=customer.interface.keypad_size
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),
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)
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self.customers[customer_id].add_new_user(new_user)
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del self.signup_sessions[session_id]
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return True
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def get_login_index_interface(self, username: str, customer_id: UUID) -> list[int]:
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"""
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TODO: how do we prevent a targeted denial-of-service attack?
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"""
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assert (customer_id in self.customers.keys())
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customer = self.customers[customer_id]
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assert (username in customer.users.keys())
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user = customer.users[username]
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user.user_interface.shuffle_interface()
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return user.user_interface.attr_indices
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def login(self, customer_id: UUID, username: str, key_selection: list[int]) -> bool:
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assert (customer_id in self.customers.keys())
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customer = self.customers[customer_id]
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return customer.valid_key_entry(username, key_selection)
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def renew_keys(self, customer_id: UUID) -> bool:
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assert (customer_id in self.customers.keys())
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return self.customers[customer_id].renew_keys()
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