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derivepassphrase.git
tests
test_derivepassphrase_vault.py
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Marco Ricci
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at 2024-09-08 11:08:45
test_derivepassphrase_vault.py
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# SPDX-FileCopyrightText: 2024 Marco Ricci <software@the13thletter.info> # # SPDX-License-Identifier: MIT """Test passphrase generation via derivepassphrase.vault.Vault.""" from __future__ import annotations import math import pytest import derivepassphrase Vault = derivepassphrase.vault.Vault class TestVault: phrase = b'She cells C shells bye the sea shoars' google_phrase = rb': 4TVH#5:aZl8LueOT\{' twitter_phrase = rb"[ (HN_N:lI&<ro=)3'g9" @pytest.mark.parametrize( ['service', 'expected'], [ (b'google', google_phrase), ('twitter', twitter_phrase), ], ) def test_200_basic_configuration( self, service: bytes | str, expected: bytes ) -> None: assert Vault(phrase=self.phrase).generate(service) == expected def test_201_phrase_dependence(self) -> None: assert ( Vault(phrase=(self.phrase + b'X')).generate('google') == b'n+oIz6sL>K*lTEWYRO%7' ) def test_202_reproducibility_and_bytes_service_name(self) -> None: assert Vault(phrase=self.phrase).generate(b'google') == Vault( phrase=self.phrase ).generate('google') def test_203_reproducibility_and_bytearray_service_name(self) -> None: assert Vault(phrase=self.phrase).generate(b'google') == Vault( phrase=self.phrase ).generate(bytearray(b'google')) def test_210_nonstandard_length(self) -> None: assert ( Vault(phrase=self.phrase, length=4).generate('google') == b'xDFu' ) def test_211_repetition_limit(self) -> None: assert ( Vault( phrase=b'', length=24, symbol=0, number=0, repeat=1 ).generate('asd') == b'IVTDzACftqopUXqDHPkuCIhV' ) def test_212_without_symbols(self) -> None: assert ( Vault(phrase=self.phrase, symbol=0).generate('google') == b'XZ4wRe0bZCazbljCaMqR' ) def test_213_no_numbers(self) -> None: assert ( Vault(phrase=self.phrase, number=0).generate('google') == b'_*$TVH.%^aZl(LUeOT?>' ) def test_214_no_lowercase_letters(self) -> None: assert ( Vault(phrase=self.phrase, lower=0).generate('google') == b':{?)+7~@OA:L]!0E$)(+' ) def test_215_at_least_5_digits(self) -> None: assert ( Vault(phrase=self.phrase, length=8, number=5).generate('songkick') == b'i0908.7[' ) def test_216_lots_of_spaces(self) -> None: assert ( Vault(phrase=self.phrase, space=12).generate('songkick') == b' c 6 Bq % 5fR ' ) def test_217_all_character_classes(self) -> None: assert ( Vault( phrase=self.phrase, lower=2, upper=2, number=1, space=3, dash=2, symbol=1, ).generate('google') == b': : fv_wqt>a-4w1S R' ) def test_218_only_numbers_and_very_high_repetition_limit(self) -> None: generated = Vault( phrase=b'', length=40, lower=0, upper=0, space=0, dash=0, symbol=0, repeat=4, ).generate('abcdef') forbidden_substrings = { b'0000', b'1111', b'2222', b'3333', b'4444', b'5555', b'6666', b'7777', b'8888', b'9999', } for substring in forbidden_substrings: assert substring not in generated def test_219_very_limited_character_set(self) -> None: generated = Vault( phrase=b'', length=24, lower=0, upper=0, space=0, symbol=0 ).generate('testing') assert generated == b'763252593304946694588866' def test_220_character_set_subtraction(self) -> None: assert Vault._subtract(b'be', b'abcdef') == bytearray(b'acdf') @pytest.mark.parametrize( ['length', 'settings', 'entropy'], [ (20, {}, math.log2(math.factorial(20)) + 20 * math.log2(94)), ( 20, {'upper': 0, 'number': 0, 'space': 0, 'symbol': 0}, math.log2(math.factorial(20)) + 20 * math.log2(26), ), (0, {}, float('-inf')), ( 0, {'lower': 0, 'number': 0, 'space': 0, 'symbol': 0}, float('-inf'), ), (1, {}, math.log2(94)), (1, {'upper': 0, 'lower': 0, 'number': 0, 'symbol': 0}, 0.0), ], ) def test_221_entropy( self, length: int, settings: dict[str, int], entropy: int ) -> None: v = Vault(length=length, **settings) # type: ignore[arg-type] assert math.isclose(v._entropy(), entropy) assert v._estimate_sufficient_hash_length() > 0 if math.isfinite(entropy) and entropy: assert v._estimate_sufficient_hash_length(1.0) == math.ceil( entropy / 8 ) assert v._estimate_sufficient_hash_length(8.0) >= entropy def test_222_hash_length_estimation(self) -> None: v = Vault( phrase=self.phrase, lower=0, upper=0, number=0, symbol=0, space=1, length=1, ) assert v._entropy() == 0.0 assert v._estimate_sufficient_hash_length() > 0 @pytest.mark.parametrize( ['service', 'expected'], [ (b'google', google_phrase), ('twitter', twitter_phrase), ], ) def test_223_hash_length_expansion( self, monkeypatch: pytest.MonkeyPatch, service: str | bytes, expected: bytes, ) -> None: v = Vault(phrase=self.phrase) monkeypatch.setattr( v, '_estimate_sufficient_hash_length', lambda *args, **kwargs: 1, # noqa: ARG005 ) assert v._estimate_sufficient_hash_length() < len(self.phrase) assert v.generate(service) == expected @pytest.mark.parametrize( 's', [ 'ñ', 'Düsseldorf', 'liberté, egalité, fraternité', 'ASCII', b'D\xc3\xbcsseldorf', bytearray([2, 3, 5, 7, 11, 13]), ], ) def test_224_binary_strings(self, s: str | bytes | bytearray) -> None: binstr = Vault._get_binary_string if isinstance(s, str): assert binstr(s) == s.encode('UTF-8') assert binstr(binstr(s)) == s.encode('UTF-8') else: assert binstr(s) == bytes(s) assert binstr(binstr(s)) == bytes(s) def test_310_too_many_symbols(self) -> None: with pytest.raises( ValueError, match='requested passphrase length too short' ): Vault(phrase=self.phrase, symbol=100) def test_311_no_viable_characters(self) -> None: with pytest.raises(ValueError, match='no allowed characters left'): Vault( phrase=self.phrase, lower=0, upper=0, number=0, space=0, dash=0, symbol=0, ) def test_320_character_set_subtraction_duplicate(self) -> None: with pytest.raises(ValueError, match='duplicate characters'): Vault._subtract(b'abcdef', b'aabbccddeeff') with pytest.raises(ValueError, match='duplicate characters'): Vault._subtract(b'aabbccddeeff', b'abcdef') def test_322_hash_length_estimation(self) -> None: v = Vault(phrase=self.phrase) with pytest.raises(ValueError, match='invalid safety factor'): assert v._estimate_sufficient_hash_length(-1.0) with pytest.raises( TypeError, match='invalid safety factor: not a float' ): assert v._estimate_sufficient_hash_length(None) # type: ignore[arg-type]
