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Day 20 fixed

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Roman Hergenreder 2019-12-29 18:33:49 +01:00
parent f2e39f023c
commit a9efab946d
1 changed files with 6 additions and 4 deletions
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10
Day 20/decode.py
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@ -1,5 +1,7 @@
byte_300 = [0xCE, 0x55, 0x95, 0x4E, 0x38, 0x0C5, 0x89, 0x0A5, 0x1B, 0x6F, 0x5E, 0x25, 0x0D2, 0x1D, 0x2A, 0x2B, 0x5E, 0x7B, 0x39, 0x14, 0x8E, 0x0D0, 0x0F0, 0x0F8, 0x0F8, 0x0A5, 0x00] byte_300 = [0xCE, 0x55, 0x95, 0x4E, 0x38, 0x0C5, 0x89, 0x0A5, 0x1B, 0x6F, 0x5E, 0x25, 0x0D2, 0x1D, 0x2A, 0x2B, 0x5E, 0x7B, 0x39, 0x14, 0x8E, 0x0D0, 0x0F0, 0x0F8, 0x0F8, 0x0A5]
BUFFER_LENGTH = len(byte_300)
with open("PS4UPDATE.PUP", "rb") as f: with open("PS4UPDATE.PUP", "rb") as f:
@ -8,12 +10,12 @@ with open("PS4UPDATE.PUP", "rb") as f:
while True: while True:
f.seek(v14) f.seek(v14)
input = bytes(f.read(27)) input = bytes(f.read(BUFFER_LENGTH))
for i in range(27): for i in range(BUFFER_LENGTH):
v29[i] = (v29[i] ^ input[i]) v29[i] = (v29[i] ^ input[i])
v14 += 4919 v14 += 4919
if v14 == 24201480: # 4920 times if v14 == 24201480: # 4919 times
break break
print("".join(chr(x) for x in v29)) print("".join(chr(x) for x in v29))