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Makes sure that blobs to be decrypred are even-length

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Sergi Delgado Segura
2019-11-08 18:20:05 +00:00
parent 8a10979db0
commit da61ea9b8e
1 changed files with 6 additions and 0 deletions
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6
pisa/cryptographer.py
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@@ -17,6 +17,12 @@ class Cryptographer:
if rtype not in ["hex", "bytes"]: if rtype not in ["hex", "bytes"]:
raise ValueError("Wrong return type. Return type must be 'hex' or 'bytes'") raise ValueError("Wrong return type. Return type must be 'hex' or 'bytes'")
if len(encrypted_blob.data) % 2:
logger.info(
"Incorrect (Odd-length) value to be decrypted.", encrypted_blob=encrypted_blob.data, dispute_txid=key
)
return None
# master_key = H(tx_id | tx_id) # master_key = H(tx_id | tx_id)
key = unhexlify(key) key = unhexlify(key)
master_key = sha256(key + key).digest() master_key = sha256(key + key).digest()