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refactor code

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This commit is contained in:
Donovan
2024-07-16 12:52:44 -05:00
parent 533151ebde
commit ec398c064a
8 changed files with 126 additions and 186 deletions
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56
src/customer_db_model.py Normal file
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@@ -0,0 +1,56 @@
from uuid import UUID
from pydantic import BaseModel
from src.customer_interface import CustomerInterface
from src.user_db_model import UserDBModel
from src.utils import xor_lists
class CustomerDBModel(BaseModel):
customer_id: UUID
interface: CustomerInterface
users: dict[str, UserDBModel]
def add_new_user(self, user: UserDBModel):
self.users[user.username] = user
def valid_key_entry(self, username, selected_keys) -> bool:
assert (username in self.users.keys())
assert (all(key_idx < self.interface.numb_keys for key_idx in selected_keys))
passcode_len = len(selected_keys)
user = self.users[username]
passcode_set_vals = user.user_keys.decipher_mask(
user.enciphered_passcode.mask, self.interface.set_vals, len(selected_keys))
set_vals_idx = [self.interface.get_set_index(set_val) for set_val in passcode_set_vals]
presumed_selected_attributes = []
presumed_selected_attributes_idx = []
for idx in range(passcode_len):
key_numb = selected_keys[idx]
key_attribute_idxs = user.user_interface.get_key_attr_idxs(key_numb)
set_idx = set_vals_idx[idx]
selected_attr_idx = key_attribute_idxs[set_idx]
presumed_selected_attributes_idx.append(selected_attr_idx)
presumed_selected_attributes.append(selected_attr_idx)
enciphered_attr = user.user_keys.encipher_salt_hash_code(presumed_selected_attributes, self.interface)
if enciphered_attr != user.enciphered_passcode.code:
return False
if user.renew:
user.refresh_passcode(presumed_selected_attributes_idx, self.interface)
return True
def renew_keys(self) -> bool:
attrs_before = self.interface.customer_interface.copy()
sets_before = self.interface.set_vals.copy()
self.interface.renew_interface()
attrs_after = self.interface.customer_interface
sets_after = self.interface.set_vals
attrs_xor = xor_lists(attrs_after, attrs_before)
set_xor = xor_lists(sets_after, sets_before)
for user in self.users.values():
user.renew_keys(set_xor, attrs_xor)
return True

18
src/nkode_interface.py → src/customer_interface.py
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@@ -1,8 +1,5 @@
from pydantic import BaseModel
from src.utils import (
generate_random_nonrepeating_list, list_to_matrix,
secure_fisher_yates_shuffle
)
from src.utils import generate_random_nonrepeating_list
class CustomerInterface(BaseModel):
@@ -27,19 +24,6 @@ class CustomerInterface(BaseModel):
self.customer_interface = generate_random_nonrepeating_list(self.attrs_per_key * self.numb_keys)
self.set_vals = generate_random_nonrepeating_list(self.attrs_per_key)
def get_interface_by_set(self) -> dict[int, list[int]]:
interface_by_set = {self.set_vals[set_val]: [] for set_val in self.set_vals}
for idx, attr_set in enumerate(self.interface):
set_idx = idx % self.numb_of_sets
interface_by_set[self.set_vals[set_idx]].append(attr_set)
return interface_by_set
def get_interface_by_key(self) -> list[list[int]]:
return list_to_matrix(self.interface, self.numb_keys)
def get_random_index_interface(self) -> list[int]:
return secure_fisher_yates_shuffle(list(range(len(self.interface))))
def get_attr_set_val(self, attr: int) -> int:
assert (attr in self.customer_interface)
attr_idx = self.customer_interface.index(attr)

112
src/pseudo_nkode_api.py
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@@ -1,95 +1,12 @@
from uuid import UUID, uuid4
from pydantic import BaseModel
from src.models import EncipheredNKode
from src.customer_db_model import CustomerDBModel
from src.session_cache import SessionCacheModel
from src.user_cipher_keys import UserCipherKeys
from src.user_db_model import UserDBModel
from src.user_interface import UserInterface
from src.nkode_interface import CustomerInterface
from src.utils import xor_lists
class UserDBModel(BaseModel):
username: str
enciphered_passcode: EncipheredNKode
user_keys: UserCipherKeys
user_interface: UserInterface
def renew_keys(self, sets_xor: list[int], attrs_xor: list[int]):
self.user_keys.renew = True
self.user_keys.set_key = xor_lists(self.user_keys.set_key, sets_xor)
self.user_keys.alpha_key = xor_lists(self.user_keys.alpha_key, attrs_xor)
def refresh_passcode(self, passcode_attr_idx: list[int], customer_interface: CustomerInterface):
self.user_keys = UserCipherKeys.new_user_encipher_keys(
customer_interface.numb_keys,
customer_interface.attrs_per_key,
customer_interface.set_vals
)
self.enciphered_passcode = self.user_keys.encipher_nkode(passcode_attr_idx, customer_interface)
class CustomerDBModel(BaseModel):
customer_id: UUID
interface: CustomerInterface
users: dict[str, UserDBModel]
def add_new_user(self, user: UserDBModel):
self.users[user.username] = user
def valid_key_entry(self, username, selected_keys) -> bool:
assert (username in self.users.keys())
assert (all(key_idx < self.interface.numb_keys for key_idx in selected_keys))
passcode_len = len(selected_keys)
user = self.users[username]
passcode_set_vals = user.user_keys.decipher_mask(
user.enciphered_passcode.mask, self.interface.set_vals, len(selected_keys))
set_vals_idx = [self.interface.get_set_index(set_val) for set_val in passcode_set_vals]
presumed_selected_attributes = []
presumed_selected_attributes_idx = []
for idx in range(passcode_len):
key_numb = selected_keys[idx]
key_attribute_idxs = user.user_interface.get_key_attr_idxs(key_numb)
set_idx = set_vals_idx[idx]
selected_attr_idx = key_attribute_idxs[set_idx]
presumed_selected_attributes_idx.append(selected_attr_idx)
presumed_selected_attributes.append(selected_attr_idx)
enciphered_attr = user.user_keys.encipher_salt_hash_code(presumed_selected_attributes, self.interface)
if enciphered_attr != user.enciphered_passcode.code:
return False
if user.user_keys.renew:
user.refresh_passcode(presumed_selected_attributes_idx, self.interface)
return True
def renew_keys(self) -> bool:
attrs_before = self.interface.customer_interface.copy()
sets_before = self.interface.set_vals.copy()
self.interface.renew_interface()
attrs_after = self.interface.customer_interface
sets_after = self.interface.set_vals
attrs_xor = xor_lists(attrs_after, attrs_before)
set_xor = xor_lists(sets_after, sets_before)
for user in self.users.values():
user.renew_keys(set_xor, attrs_xor)
return True
class SessionCacheModel(BaseModel):
session_id: UUID
set_interface: list[int] | None = None
confirm_interface: list[int] | None = None
set_key_entry: list[int] | None = None
confirm_key_entry: list[int] | None = None
username: str | None = None
customer_id: UUID
# timeout: datetime
from src.customer_interface import CustomerInterface
class PseudoNKodeAPI(BaseModel):
@@ -149,11 +66,12 @@ class PseudoNKodeAPI(BaseModel):
customer_id == self.sessions[session_id].customer_id and
username == self.sessions[session_id].username
)
session = self.sessions[session_id]
customer = self.customers[customer_id]
numb_of_keys = customer.interface.numb_keys
attrs_per_key = customer.interface.attrs_per_key
assert (all(0 <= key <= numb_of_keys for key in confirm_key_entry))
passcode = self._deduce_passcode(session_id, attrs_per_key, confirm_key_entry)
passcode = session.deduce_passcode(attrs_per_key, confirm_key_entry)
set_values = customer.interface.set_vals
new_user_keys = UserCipherKeys.new_user_encipher_keys(numb_of_keys, attrs_per_key, set_values)
enciphered_passcode = new_user_keys.encipher_nkode(passcode, customer.interface)
@@ -171,24 +89,6 @@ class PseudoNKodeAPI(BaseModel):
return "success"
# del self.sessions[session_id]
def _deduce_passcode(self, session_id: UUID, attrs_per_key, confirm_key_entry: list[int]) -> list[int]:
session = self.sessions[session_id]
set_key_entry = session.set_key_entry
assert (len(set_key_entry) == len(confirm_key_entry))
set_interface = session.set_interface
confirm_interface = session.confirm_interface
set_key_vals = [set_interface[key * attrs_per_key:(key + 1) * attrs_per_key] for key in set_key_entry]
confirm_key_vals = [confirm_interface[key * attrs_per_key:(key + 1) * attrs_per_key] for key in
confirm_key_entry]
passcode = []
for idx in range(len(set_key_entry)):
set_key = set(set_key_vals[idx])
confirm_key = set(confirm_key_vals[idx])
intersection = list(set_key.intersection(confirm_key))
assert (len(intersection) == 1)
passcode.append(intersection[0])
return passcode
def login(self, customer_id: UUID, username: str, key_selection: list[int]) -> bool:
assert (customer_id in self.customers.keys())

31
src/session_cache.py Normal file
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@@ -0,0 +1,31 @@
from uuid import UUID
from pydantic import BaseModel
class SessionCacheModel(BaseModel):
session_id: UUID
set_interface: list[int] | None = None
confirm_interface: list[int] | None = None
set_key_entry: list[int] | None = None
confirm_key_entry: list[int] | None = None
username: str | None = None
customer_id: UUID
def deduce_passcode(self, attrs_per_key, confirm_key_entry: list[int]) -> list[int]:
set_key_entry = self.set_key_entry
assert (len(set_key_entry) == len(confirm_key_entry))
set_interface = self.set_interface
confirm_interface = self.confirm_interface
set_key_vals = [set_interface[key * attrs_per_key:(key + 1) * attrs_per_key] for key in set_key_entry]
confirm_key_vals = [confirm_interface[key * attrs_per_key:(key + 1) * attrs_per_key] for key in
confirm_key_entry]
passcode = []
for idx in range(len(set_key_entry)):
set_key = set(set_key_vals[idx])
confirm_key = set(confirm_key_vals[idx])
intersection = list(set_key.intersection(confirm_key))
assert (len(intersection) == 1)
passcode.append(intersection[0])
return passcode

8
src/user_cipher_keys.py
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@@ -5,7 +5,7 @@ from secrets import choice
from pydantic import BaseModel
from src.models import EncipheredNKode
from src.nkode_interface import CustomerInterface
from src.customer_interface import CustomerInterface
from src.utils import generate_random_nonrepeating_list, xor_lists, int_array_to_bytes
@@ -16,7 +16,6 @@ class UserCipherKeys(BaseModel):
mask_key: list[int]
salt: bytes
max_nkode_len: int = 10
renew: bool = False
@staticmethod
def new_user_encipher_keys(numb_of_keys: int, attrs_per_key: int, set_values: list[int]):
@@ -40,11 +39,6 @@ class UserCipherKeys(BaseModel):
padded_user_mask.append(choice(set_vals))
return padded_user_mask
@staticmethod
def pad_user_code(user_code: list[int], max_nkode_len: int) -> list[int]:
assert (len(user_code) <= max_nkode_len)
return user_code + [0 for _ in range(max_nkode_len - len(user_code))]
@staticmethod
def encode_base64_str(data: list[int]) -> str:
return base64.b64encode(int_array_to_bytes(data)).decode("utf-8")

30
src/user_db_model.py Normal file
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@@ -0,0 +1,30 @@
from pydantic import BaseModel
from src.models import EncipheredNKode
from src.customer_interface import CustomerInterface
from src.user_cipher_keys import UserCipherKeys
from src.user_interface import UserInterface
from src.utils import xor_lists
class UserDBModel(BaseModel):
username: str
enciphered_passcode: EncipheredNKode
user_keys: UserCipherKeys
user_interface: UserInterface
renew: bool = False
def renew_keys(self, sets_xor: list[int], attrs_xor: list[int]):
self.renew = True
self.user_keys.set_key = xor_lists(self.user_keys.set_key, sets_xor)
self.user_keys.alpha_key = xor_lists(self.user_keys.alpha_key, attrs_xor)
def refresh_passcode(self, passcode_attr_idx: list[int], customer_interface: CustomerInterface):
self.user_keys = UserCipherKeys.new_user_encipher_keys(
customer_interface.numb_keys,
customer_interface.attrs_per_key,
customer_interface.set_vals
)
self.enciphered_passcode = self.user_keys.encipher_nkode(passcode_attr_idx, customer_interface)
self.renew = False