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Update segafs/makesegafs.py

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beerpsi 2024-07-22 05:30:40 +00:00
parent f8a759c3a4
commit fc8b5dc3d8
1 changed files with 270 additions and 256 deletions
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30
segafs/makesegafs.py
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@ -25,8 +25,13 @@ ENCRYPTION_KEY = bytes.fromhex("")
INPUT_FILE = "" # Should not be encrypted.
OUTPUT_FILE = ""
BOOTID = {
"type": 0x0201, # 0x0201: Option, 0x0000: Pack, 0x0101: App
"sequence_number": 0x0000, # Set to 256 (0x0100) for options.
"unk1": 0x01, # Ocassionally you'll see this be 0.
"type": 0x01, # 0: OS, 1: App, 2: Option
"sequence_number": 0, # Only applies to app patches.
# If this is enabled, the container should be decrypted with a derived IV. The derivation algorithm is unknown.
"derive_iv": 0,
"game_id": b"SDGS",
"game_timestamp": {
"year": 2023,
@ -40,7 +45,7 @@ BOOTID = {
"game_version": b"A041",
"block_size": 0x40000,
"header_block_count": 8,
"unk1": 0,
"unk2": 0,
"hw_family": b"ACA",
"hw_generation": 0,
"org_timestamp": {
@ -62,8 +67,9 @@ BOOTID = {
"minor": 54,
"major": 80,
},
"strings": b"\x00"
* 0x27AC, # Depending on the app/opt/pack, this might have some text in it.
# Depending on the app/opt/pack, this might have some text in it.
"strings": b"\x00" * 0x27AC,
}
# ----
@ -71,9 +77,15 @@ BOOTID = {
# The BootID (app/opt/pack header) encryption key and IV.
BTKEY = bytes.fromhex("09ca5efd30c9aaef3804d0a7e3fa7120")
BTIV = bytes.fromhex("b155c22c2e7f0491fa7f0fdc217aff90")
# The HMAC key used to "verify" the array of block CRCs.
SIGKEY = bytes.fromhex(
"e1bdcb2d5e9ed3b5de234364dfa4d126849edff769fc6c28fba5f43bc482bd7479d676afce8188e1d3a6852f4ebce45cde46bd15e8ee5fe84d197f945a54518f"
)
# The header metadata contains the timestamp when the container is
# created, and the path to the original file, then just a bunch of random
# bytes. The private key used to decrypt the header metadata is unknown.
HEADER_META_PUBKEY = RSA.import_key("""-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsRMLnJuczNpfoqPpHQ3o
5XNkjKXO6P3ToV/45Az5dNaHVL7uEu9vPI7a2KYFQnNYgD3UUHFahfTcljzLOkcH
@ -111,15 +123,17 @@ Version = Struct(
BootID = Struct(
"length" / Const(0x2800, Int32ul),
"magic" / Const(b"BTID", Bytes(4)),
"type" / Int16ul,
"sequence_number" / Int16ul,
"unk1" / Int8ul,
"type" / Int8ul,
"sequence_number" / Int8ul,
"derive_iv" / Int8ul,
"game_id" / Bytes(4),
"game_timestamp" / Timestamp,
"game_version" / IfThenElse(lambda ctx: ctx.type == 0x0201, Bytes(4), Version),
"block_count" / Int64ul,
"block_size" / Int64ul,
"header_block_count" / Int64ul,
"unk1" / Int64ul,
"unk2" / Int64ul,
"hw_family" / Bytes(3),
"hw_generation" / Int8ul,
"org_timestamp" / Timestamp,