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@ -42,9 +42,8 @@ if False:
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Indices = Tuple[int, ...]
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MnemonicGroups = dict[int, tuple[int, set[tuple[int, bytes]]]]
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"""
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## Simple helpers
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"""
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# === Simple helpers ===
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_RADIX_BITS = const(10)
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"""The length of the radix in bits."""
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@ -62,9 +61,7 @@ def _xor(a: bytes, b: bytes) -> bytes:
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return bytes(x ^ y for x, y in zip(a, b))
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"""
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## Constants
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"""
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# === Constants ===
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_ID_LENGTH_BITS = const(15)
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"""The length of the random identifier in bits."""
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@ -106,9 +103,7 @@ _DIGEST_INDEX = const(254)
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"""The index of the share containing the digest of the shared secret."""
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"""
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# Keyboard functions
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"""
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# === Keyboard functions ===
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KEYBOARD_FULL_MASK = const(0x1FF)
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"""All buttons are allowed. 9-bit bitmap all set to 1."""
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@ -126,9 +121,7 @@ def button_sequence_to_word(prefix: str) -> str:
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return slip39.button_sequence_to_word(int(prefix))
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"""
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# External API
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"""
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# === External API ===
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MAX_SHARE_COUNT = const(16)
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"""The maximum number of shares that can be created."""
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@ -265,7 +258,7 @@ def recover_ems(mnemonics: list[str]) -> tuple[int, int, bytes]:
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identifier,
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iteration_exponent,
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group_threshold,
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group_count,
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_group_count,
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groups,
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) = _decode_mnemonics(mnemonics)
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@ -274,7 +267,7 @@ def recover_ems(mnemonics: list[str]) -> tuple[int, int, bytes]:
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f"Wrong number of mnemonic groups. Expected {group_threshold} groups, but {len(groups)} were provided."
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)
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for group_index, group in groups.items():
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for group in groups.values():
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if len(group[1]) != group[0]: # group[0] is threshold
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raise MnemonicError(
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f"Wrong number of mnemonics. Expected {group[0]} mnemonics, but {len(group[1])} were provided."
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@ -344,9 +337,7 @@ def decode_mnemonic(mnemonic: str) -> Share:
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)
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"""
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## Convert mnemonics or integers to indices and back
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"""
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# === Convert mnemonics or integers to indices and back ===
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def _int_from_indices(indices: Indices) -> int:
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@ -371,9 +362,7 @@ def _mnemonic_to_indices(mnemonic: str) -> Iterable[int]:
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return (slip39.word_index(word.lower()) for word in mnemonic.split())
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"""
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## Checksum functions
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"""
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# === Checksum functions ===
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def _rs1024_create_checksum(data: Indices) -> Indices:
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@ -449,9 +438,7 @@ def _rs1024_error_index(data: Indices) -> int | None:
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return None
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"""
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## Internal functions
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"""
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# === Internal functions ===
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def _round_function(i: int, passphrase: bytes, e: int, salt: bytes, r: bytes) -> bytes:
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@ -616,7 +603,7 @@ def _decode_mnemonics(
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"Invalid set of mnemonics. All mnemonics must have the same group count."
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)
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for group_index, group in groups.items():
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for group in groups.values():
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if len(set(share[0] for share in group[1])) != len(group[1]):
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raise MnemonicError(
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"Invalid set of shares. Member indices in each group must be unique."
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matejcik
3 years ago
committed by