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Adds check that multiple mnemonic languages aren't detected

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Carl Beekhuizen 2022-03-28 11:24:52 +02:00 committed by Thorsten Behrens
parent 885826c526
commit 0d3440e7ba
1 changed files with 8 additions and 2 deletions
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10
staking_deposit/key_handling/key_derivation/mnemonic.py
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@ -108,6 +108,7 @@ def reconstruct_mnemonic(mnemonic: str, words_path: str) -> Optional[str]:
languages = determine_mnemonic_language(mnemonic, words_path) languages = determine_mnemonic_language(mnemonic, words_path)
except ValueError: except ValueError:
return None return None
reconstructed_mnemonic = None
for language in languages: for language in languages:
try: try:
word_list = abbreviate_words(_get_word_list(language, words_path)) word_list = abbreviate_words(_get_word_list(language, words_path))
@ -122,12 +123,17 @@ def reconstruct_mnemonic(mnemonic: str, words_path: str) -> Optional[str]:
entropy_bits = entropy.to_bytes(checksum_length * 4, 'big') entropy_bits = entropy.to_bytes(checksum_length * 4, 'big')
full_word_list = _get_word_list(language, words_path) full_word_list = _get_word_list(language, words_path)
if _get_checksum(entropy_bits) == checksum: if _get_checksum(entropy_bits) == checksum:
return ' '.join([_index_to_word(full_word_list, index) for index in word_indices]) """
This check guarantees that only one language has a valid mnemonic.
It is needed to ensure abbrivated words aren't valid in multiple languages
"""
assert reconstructed_mnemonic is None
reconstructed_mnemonic = ' '.join([_index_to_word(full_word_list, index) for index in word_indices])
else: else:
pass pass
except ValueError: except ValueError:
pass pass
return None return reconstructed_mnemonic
def get_mnemonic(*, language: str, words_path: str, entropy: Optional[bytes]=None) -> str: def get_mnemonic(*, language: str, words_path: str, entropy: Optional[bytes]=None) -> str: