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show more information for a blob padding error

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This commit is contained in:
Jack Robison 2017-09-07 11:55:18 -04:00
parent a72fef07c0
commit 632fd764fa
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1 changed files with 5 additions and 1 deletions
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6
lbrynet/cryptstream/CryptBlob.py
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@ -58,7 +58,11 @@ class StreamBlobDecryptor(object):
write_func(self.cipher.update(data_to_decrypt))
def finish_decrypt():
assert len(self.buff) % (AES.block_size / 8) == 0
bytes_left = len(self.buff) % (AES.block_size / 8)
if bytes_left != 0:
log.warning(self.buff[-1 * (AES.block_size / 8):].encode('hex'))
raise Exception("blob %s has incorrect padding: %i bytes left" %
(self.blob.blob_hash, bytes_left))
data_to_decrypt, self.buff = self.buff, b''
last_chunk = self.cipher.update(data_to_decrypt) + self.cipher.finalize()
write_func(remove_padding(last_chunk))