voussoir/megapy
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Reuse this key list instead of creating a new one each loop.

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This commit is contained in:
Ethan Dalool 2020-11-11 21:41:05 -08:00
parent ce789e105e
commit 40644921dc
1 changed files with 3 additions and 1 deletions
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4
src/mega/crypto.py
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@ -51,12 +51,14 @@ def stringhash(str, aeskey):
def prepare_key(arr):
pkey = [0x93C467E3, 0x7DB0C7A4, 0xD1BE3F81, 0x0152CB56]
key = [0, 0, 0, 0]
for r in range(0x10000):
for j in range(0, len(arr), 4):
key = [0, 0, 0, 0]
for i in range(4):
if i + j < len(arr):
key[i] = arr[i + j]
else:
key[i] = 0
pkey = aes_cbc_encrypt_a32(pkey, key)
return pkey