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Successfully decrypted!

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This commit is contained in:
Nichlas Severinsen 2018-07-03 21:18:36 +02:00
parent cfa8b1ca66
commit b5ba35dfd2
2 changed files with 20 additions and 74 deletions
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4
.gitignore vendored
View file

@ -4,6 +4,10 @@
*.txt *.txt
ird ird
region_* region_*
*.bin
*.BIN
*.ini
*.INI
# Byte-compiled / optimized / DLL files # Byte-compiled / optimized / DLL files
__pycache__/ __pycache__/

90
LibRay-PS3/libray-ps3.py
View file

@ -72,18 +72,19 @@ if __name__ == '__main__':
bprint(b'\x00\x00s\xc2\x7f') bprint(b'\x00\x00s\xc2\x7f')
bprint(b'\x00\x00s\xc2\x80') bprint(b'\x00\x00s\xc2\x80')
data = hexstr_to_bytes("11089487d46ec9c1ec71205c2a6e8adc") data = hexstr_to_bytes("11089487d46ec9c1ec71205c2a6e8adc") # bles00048
#data = hexstr_to_bytes("18c871628e0c3bbbd20b8a4cfb40b750") # bles000681
key = hexstr_to_bytes("380bcf0b53455b3c7817ab4fa3ba90ed") key = hexstr_to_bytes("380bcf0b53455b3c7817ab4fa3ba90ed")
iv = hexstr_to_bytes("69474772af6fdab342743aefaa186287") iv = hexstr_to_bytes("69474772af6fdab342743aefaa186287")
cipher = AES.new(key, AES.MODE_CBC, iv) cipher = AES.new(key, AES.MODE_CBC, iv)
disc_key = cipher.encrypt(data) disc_key = cipher.encrypt(data)
print(disc_key) #print(disc_key)
print(disc_key.hex()) #print(disc_key.hex())
disc_key = hexstr_to_bytes("01AD4F9DFED22E37998BDDC57E135935") #disc_key = hexstr_to_bytes("01AD4F9DFED22E37998BDDC57E135935")
print(disc_key.hex()) #print(disc_key.hex())
print(unpad(disc_key.hex())) #print(unpad(disc_key.hex()))
disc_key = hexstr_to_bytes("DCD55A55B033905C58E7FE2A7F969F27") #disc_key = hexstr_to_bytes("DCD55A55B033905C58E7FE2A7F969F27")
regions = [ regions = [
{'start': 0, 'end': 6682624, 'enc': False}, {'start': 0, 'end': 6682624, 'enc': False},
@ -94,7 +95,7 @@ if __name__ == '__main__':
] ]
files = [] files = []
test = hexstr_to_bytes("70c2a1") test = hexstr_to_bytes("533570a1")
with open(sys.argv[1], 'rb') as iso: with open(sys.argv[1], 'rb') as iso:
for i, region in enumerate(regions): for i, region in enumerate(regions):
files.append('region_' + str(i)) files.append('region_' + str(i))
@ -108,17 +109,21 @@ if __name__ == '__main__':
continue continue
else: else:
while iso.tell() < region['end']: while iso.tell() < region['end']:
data = iso.read(core.SECTOR) num = iso.tell() // 2048
num = iso.tell() backupnum = num
iv = bytearray([0 for i in range(0,16)]) iv = bytearray([0 for i in range(0,16)])
for j in range(0,16): for j in range(0,16):
iv[16 - j - 1] = (num & 0xFF) iv[16 - j - 1] = (num & 0xFF)
num >>= 8 num >>= 8
data = iso.read(core.SECTOR)
cipher = AES.new(disc_key, AES.MODE_CBC, bytes(iv)) cipher = AES.new(disc_key, AES.MODE_CBC, bytes(iv))
decrypted = cipher.decrypt(data) decrypted = cipher.decrypt(data)
if test in decrypted: if test in decrypted:
print('nyees')
print(backupnum)
print(iv.hex()) print(iv.hex())
print(data.hex()) print(data.hex())
print(decrypted.hex()) print(decrypted.hex())
@ -133,67 +138,4 @@ if __name__ == '__main__':
shutil.copyfileobj(fd, iso, 1024*1024*10) shutil.copyfileobj(fd, iso, 1024*1024*10)
sys.exit() sys.exit()
size = os.stat(sys.argv[1]).st_size
size_hex = bytes(bytearray.fromhex(hex(int(size / 2048)).replace('0x','').zfill(16)))
print(size, size_hex)
with open(sys.argv[1], 'rb') as iso:
sector1 = iso.read(core.SECTOR)
num_unenc_sectors = int.from_bytes(sector1[0:4], core.ORDER)
unknown = sector1[4:8]
regions = []
encrypted = False
# TODO: I think I have a bug, these start and end addresses should be multiplied by 8?
for i in range(0, (num_unenc_sectors*2)-1 ):
regions.append({'start': sector1[8+4*i:12+4*i], 'end': sector1[12+4*i:16+4*i], 'enc': encrypted})
encrypted = not encrypted
regions.append({'start': regions[-1]['end'], 'end': size_hex, 'enc': True})
print(regions)
# data1 from ird: 44 4901 0800 0020 0042 444f 0111 0101 00
# TODO: import .ird (which can either be plaintext starting with 3IRD or .gz)
print(disc_key)
with open('output.iso', 'wb') as output:
for region in regions:
start = int(region["start"].hex(), 16)*2048
end = int(region["end"].hex(), 16)*2048
#start = int.from_bytes(region["start"], core.ORDER)*8
#end = int.from_bytes(region["end"], core.ORDER)*8
print(region)
print('start: ', start)
print('end: ', end)
print('size: ', end - start - 1)
if region['enc']:
num = end
print(num)
iv = ['' for i in range(0,16)]
for j in range(0,16):
iv[16 - j - 1] = hex(ord(struct.pack("B", num & 0xFF))).replace('0x','')
num >>= 8
iv = "".join(iv)[-16:]
iso.seek(start)
data = iso.read(end - start - 1)
print(len(data))
cipher = AES.new(disc_key, AES.MODE_CBC, iv)
output.write(cipher.decrypt(data))
continue
iso.seek(start)
data = iso.read(end - start - 1)
print(len(data))
output.write(data)