Initial commit

This commit is contained in:
Bottersnike 2022-02-03 20:55:07 +00:00
commit e8ccee4a10
22 changed files with 1376 additions and 0 deletions

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.gitignore vendored Normal file
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*.pyc
__pycache__/
*.log
*.db
misc/
*.egg-info
# Sorry
eaapi/keys.py

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eaapi/__init__.py Normal file
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from .const import Type
from .node import XMLNode
from .encoder import Encoder
from .decoder import Decoder
from .wrapper import wrap, unwrap
from .misc import parse_model
__all__ = (
"Type", "XMLNode", "Encoder", "Decoder",
"wrap", "unwrap",
"parse_model",
)

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eaapi/cardconv.py Normal file
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import binascii
from Crypto.Cipher import DES3
from .misc import assert_true, pack, unpack
from .exception import InvalidCard
from .keys import CARDCONV_KEY
from .const import CARD_ALPHABET
def enc_des(uid):
cipher = DES3.new(CARDCONV_KEY, DES3.MODE_CBC, iv=b'\0' * 8)
return cipher.encrypt(uid)
def dec_des(uid):
cipher = DES3.new(CARDCONV_KEY, DES3.MODE_CBC, iv=b'\0' * 8)
return cipher.decrypt(uid)
def checksum(data):
chk = sum(data[i] * (i % 3 + 1) for i in range(15))
while chk > 31:
chk = (chk >> 5) + (chk & 31)
return chk
def uid_to_konami(uid):
assert_true(len(uid) == 16, "UID must be 16 bytes", InvalidCard)
if uid.upper().startswith("E004"):
card_type = 1
elif uid.upper().startswith("0"):
card_type = 2
else:
raise InvalidCard("Invalid UID prefix")
kid = binascii.unhexlify(uid)
assert_true(len(kid) == 8, "ID must be 8 bytes", InvalidCard)
out = bytearray(unpack(enc_des(kid[::-1]), 5)[:13]) + b'\0\0\0'
out[0] ^= card_type
out[13] = 1
for i in range(1, 14):
out[i] ^= out[i - 1]
out[14] = card_type
out[15] = checksum(out)
return "".join(CARD_ALPHABET[i] for i in out)
def konami_to_uid(konami_id):
if konami_id[14] == "1":
card_type = 1
elif konami_id[14] == "2":
card_type = 2
else:
raise InvalidCard("Invalid ID")
assert_true(len(konami_id) == 16, "ID must be 16 characters", InvalidCard)
assert_true(all(i in CARD_ALPHABET for i in konami_id), "ID contains invalid characters", InvalidCard)
card = [CARD_ALPHABET.index(i) for i in konami_id]
assert_true(card[11] % 2 == card[12] % 2, "Parity check failed", InvalidCard)
assert_true(card[13] == card[12] ^ 1, "Card invalid", InvalidCard)
assert_true(card[15] == checksum(card), "Checksum failed", InvalidCard)
for i in range(13, 0, -1):
card[i] ^= card[i - 1]
card[0] ^= card_type
card_id = dec_des(pack(card[:13], 5)[:8])[::-1]
card_id = binascii.hexlify(card_id).decode().upper()
if card_type == 1:
assert_true(card_id[:4] == "E004", "Invalid card type", InvalidCard)
elif card_type == 2:
assert_true(card_id[0] == "0", "Invalid card type", InvalidCard)
return card_id
__all__ = ("konami_to_uid", "uid_to_konami")

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import enum
from dataclasses import dataclass
from html import unescape
from typing import List, Callable
from .misc import assert_true
CARD_ALPHABET = "0123456789ABCDEFGHJKLMNPRSTUWXYZ"
NAME_MAX_COMPRESSED = 0x24
NAME_MAX_DECOMPRESSED = 0x1000
ENCODING = {
0x20: "ascii",
0x40: "iso-8859-1",
0x60: "euc-jp",
0x80: "shift-jis",
0xA0: "utf-8",
}
DEFAULT_ENCODING = ENCODING[0x80] # Shift-JIS
ENCODING[0x00] = DEFAULT_ENCODING
XML_ENCODING = {
"ASCII": "ascii",
"ISO-8859-1": "iso-8859-1",
"EUC-JP": "euc-jp",
"SHIFT_JIS": "shift-jis",
"SHIFT-JIS": "shift-jis",
"UTF-8": "utf-8",
}
ENCODING_BACK = {v: k for k, v in ENCODING.items()}
XML_ENCODING_BACK = {v: k for k, v in XML_ENCODING.items()}
ATTR = 0x2E
END_NODE = 0xFE
END_DOC = 0xFF
PACK_ALPHABET = "0123456789:ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz"
CONTENT_COMP_FULL = 0x42
CONTENT_COMP_SCHEMA = 0x43
CONTENT_FINGERPRINT = 0x44 # TODO: Identify how exactly this differs from the others
CONTENT_ASCII_FULL = 0x45
CONTENT_ASCII_SCHEMA = 0x46
CONTENT_COMP = (CONTENT_COMP_FULL, CONTENT_COMP_SCHEMA)
CONTENT_FULL = (CONTENT_COMP_FULL, CONTENT_ASCII_FULL)
CONTENT = (
CONTENT_COMP_FULL, CONTENT_COMP_SCHEMA, CONTENT_FINGERPRINT,
CONTENT_ASCII_FULL, CONTENT_ASCII_SCHEMA
)
ARRAY_BIT = 0x40
ARRAY_MASK = ARRAY_BIT - 1
@dataclass
class _Type:
id: int
fmt: str
names: List[str]
c_name: str
convert: Callable
size: int = 1
no_check: bool = False
def _parse(self, value):
if self.convert is None:
return ()
if self.size == 1:
if isinstance(value, (list, tuple)) and len(value) == 1:
value = value[0]
return self.convert(value)
if not self.no_check:
assert_true(len(value) == self.size, "Invalid node data")
return (*map(self.convert, value),)
def parse_ip(ip):
return (*map(int, ip.split(".")),)
class Type(enum.Enum):
Void = _Type(0x01, "", ["void"], "void", None)
S8 = _Type(0x02, "b", ["s8"], "int8", int)
U8 = _Type(0x03, "B", ["u8"], "uint8", int)
S16 = _Type(0x04, "h", ["s16"], "int16", int)
U16 = _Type(0x05, "H", ["u16"], "uint16", int)
S32 = _Type(0x06, "i", ["s32"], "int32", int)
U32 = _Type(0x07, "I", ["u32"], "uint32", int)
S64 = _Type(0x08, "q", ["s64"], "int64", int)
U64 = _Type(0x09, "Q", ["u64"], "uint64", int)
Blob = _Type(0x0a, "S", ["bin", "binary"], "char[]", bytes)
Str = _Type(0x0b, "s", ["str", "string"], "char[]", unescape)
IPv4 = _Type(0x0c, "4B", ["ip4"], "uint8[4]", parse_ip, 1, True)
Time = _Type(0x0d, "I", ["time"], "uint32", int)
Float = _Type(0x0e, "f", ["float", "f"], "float", float)
Double = _Type(0x0f, "d", ["double", "d"], "double", float)
TwoS8 = _Type(0x10, "2b", ["2s8"], "int8[2]", int, 2)
TwoU8 = _Type(0x11, "2B", ["2u8"], "uint8[2]", int, 2)
TwoS16 = _Type(0x12, "2h", ["2s16"], "int16[2]", int, 2)
TwoU16 = _Type(0x13, "2H", ["2u16"], "uint16[2]", int, 2)
TwoS32 = _Type(0x14, "2i", ["2s32"], "int32[2]", int, 2)
TwoU32 = _Type(0x15, "2I", ["2u32"], "uint32[2]", int, 2)
TwoS64 = _Type(0x16, "2q", ["2s64", "vs64"], "int16[2]", int, 2)
TwoU64 = _Type(0x17, "2Q", ["2u64", "vu64"], "uint16[2]", int, 2)
TwoFloat = _Type(0x18, "2f", ["2f"], "float[2]", float, 2)
TwoDouble = _Type(0x19, "2d", ["2d", "vd"], "double[2]", float, 2)
ThreeS8 = _Type(0x1a, "3b", ["3s8"], "int8[3]", int, 3)
ThreeU8 = _Type(0x1b, "3B", ["3u8"], "uint8[3]", int, 3)
ThreeS16 = _Type(0x1c, "3h", ["3s16"], "int16[3]", int, 3)
ThreeU16 = _Type(0x1d, "3H", ["3u16"], "uint16[3]", int, 3)
ThreeS32 = _Type(0x1e, "3i", ["3s32"], "int32[3]", int, 3)
ThreeU32 = _Type(0x1f, "3I", ["3u32"], "uint32[3]", int, 3)
ThreeS64 = _Type(0x20, "3q", ["3s64"], "int64[3]", int, 3)
ThreeU64 = _Type(0x21, "3Q", ["3u64"], "uint64[3]", int, 3)
ThreeFloat = _Type(0x22, "3f", ["3f"], "float[3]", float, 3)
ThreeDouble = _Type(0x23, "3d", ["3d"], "double[3]", float, 3)
FourS8 = _Type(0x24, "4b", ["4s8"], "int8[4]", int, 4)
FourU8 = _Type(0x25, "4B", ["4u8"], "uint8[4]", int, 4)
FourS16 = _Type(0x26, "4h", ["4s16"], "int16[4]", int, 4)
FourU16 = _Type(0x27, "4H", ["4u16"], "uint8[4]", int, 4)
FourS32 = _Type(0x28, "4i", ["4s32", "vs32"], "int32[4]", int, 4)
FourU32 = _Type(0x29, "4I", ["4u32", "vs32"], "uint32[4]", int, 4)
FourS64 = _Type(0x2a, "4q", ["4s64"], "int64[4]", int, 4)
FourU64 = _Type(0x2b, "4Q", ["4u64"], "uint64[4]", int, 4)
FourFloat = _Type(0x2c, "4f", ["4f", "vf"], "float[4]", float, 4)
FourDouble = _Type(0x2d, "4d", ["4d"], "double[4]", float, 4)
Attr = _Type(0x2e, "s", ["attr"], "char[]", None)
Array = _Type(0x2f, "", ["array"], "", None)
VecS8 = _Type(0x30, "16b", ["vs8"], "int8[16]", int, 16)
VecU8 = _Type(0x31, "16B", ["vu8"], "uint8[16]", int, 16)
VecS16 = _Type(0x32, "8h", ["vs16"], "int8[8]", int, 8)
VecU16 = _Type(0x33, "8H", ["vu16"], "uint8[8]", int, 8)
Bool = _Type(0x34, "b", ["bool", "b"], "bool", int)
TwoBool = _Type(0x35, "2b", ["2b"], "bool[2]", int, 2)
ThreeBool = _Type(0x36, "3b", ["3b"], "bool[3]", int, 3)
FourBool = _Type(0x37, "4b", ["4b"], "bool[4]", int, 4)
VecBool = _Type(0x38, "16b", ["vb"], "bool[16]", int, 16)
@classmethod
def from_val(cls, value):
for i in cls:
if i.value.id == value & ARRAY_MASK:
return i
raise ValueError(f"Unknown node type {value}")

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import binascii
import hashlib
import time
import re
from Crypto.Cipher import ARC4
from .misc import assert_true
from .keys import EA_KEY
def new_prng():
state = 0x41c64e6d
while True:
x = (state * 0x838c9cda) + 0x6072
# state = (state * 0x41c64e6d + 0x3039)
# state = (state * 0x41c64e6d + 0x3039)
state = (state * 0xc2a29a69 + 0xd3dc167e) & 0xffffffff
yield (x & 0x7fff0000) | state >> 15 & 0xffff
prng = new_prng()
def validate_key(info):
match = re.match(r"^(\d)-([0-9a-f]{8})-([0-9a-f]{4})$", info)
assert_true(match, "Invalid eamuse info key")
version = match.group(1)
assert_true(version == "1", f"Unsupported encryption version ({version})")
seconds = binascii.unhexlify(match.group(2)) # 4 bytes
rng = binascii.unhexlify(match.group(3)) # 2 bytes
return seconds, rng
def get_key():
return f"1-{int(time.time()):08x}-{(next(prng) & 0xffff):04x}"
def ea_symmetric_crypt(data, info):
seconds, rng = validate_key(info)
key = hashlib.md5(seconds + rng + EA_KEY).digest()
return ARC4.new(key).encrypt(data)
__all__ = ("new_prng", "prng", "validate_key", "get_key", "ea_symmetric_crypt")

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import math
import struct
import io
from html import unescape
try:
from lxml import etree
except ModuleNotFoundError:
print("W", "lxml not found, XML strings will not be supported")
etree = None
from .packer import Packer
from .const import (
NAME_MAX_COMPRESSED, NAME_MAX_DECOMPRESSED, ATTR, PACK_ALPHABET, END_NODE, END_DOC, ARRAY_BIT,
ENCODING, CONTENT, CONTENT_COMP, CONTENT_FULL, XML_ENCODING, Type
)
from .misc import unpack, py_encoding, assert_true
from .node import XMLNode
from .exception import DecodeError
class Decoder:
def __init__(self, packet):
self.stream = io.BytesIO(packet)
self.is_xml_string = packet.startswith(b"<")
self.encoding = None
self.compressed = False
self.has_data = False
self.packer = None
@classmethod
def decode(cls, packet):
return cls(packet).unpack()
def read(self, s_format, single=True, align=True):
if s_format == "S":
length = self.read("L")
if self.packer:
self.packer.notify_skipped(length)
return self.stream.read(length)
if s_format == "s":
length = self.read("L")
if self.packer:
self.packer.notify_skipped(length)
raw = self.stream.read(length)
return raw.decode(py_encoding(self.encoding)).rstrip("\0")
length = struct.calcsize("=" + s_format)
if self.packer and align:
self.stream.seek(self.packer.request_allocation(length))
data = self.stream.read(length)
assert_true(len(data) == length, "EOF reached", DecodeError)
value = struct.unpack(">" + s_format, data)
return value[0] if single else value
def _read_node_value(self, node):
fmt = node.type.value.fmt
count = 1
if node.is_array:
length = struct.calcsize("=" + fmt)
count = self.read("I") // length
values = []
for _ in range(count):
values.append(self.read(fmt, single=len(fmt) == 1, align=False))
self.packer.notify_skipped(count * length)
return values
node.value = self.read(fmt, single=len(fmt) == 1)
def _read_metadata_name(self):
length = self.read("B")
if not self.compressed:
if length < 0x80:
assert_true(length >= 0x40, "Invalid name length", DecodeError)
# i.e. length = (length & ~0x40) + 1
length -= 0x3f
else:
length = (length << 8) | self.read("B")
# i.e. length = (length & ~0x8000) + 0x41
length -= 0x7fbf
assert_true(length <= NAME_MAX_DECOMPRESSED, "Name length too long", DecodeError)
name = self.stream.read(length)
assert_true(len(name) == length, "Not enough bytes to read name", DecodeError)
return name.decode(self.encoding)
out = ""
if length == 0:
return out
assert_true(length <= NAME_MAX_COMPRESSED, "Name length too long", DecodeError)
no_bytes = math.ceil((length * 6) / 8)
unpacked = unpack(self.stream.read(no_bytes), 6)[:length]
return "".join(PACK_ALPHABET[i] for i in unpacked)
def _read_metadata(self, type_):
name = self._read_metadata_name()
node = XMLNode(name, type_, None, encoding=self.encoding)
while (child := self.read("B")) != END_NODE:
if child == ATTR:
attr = self._read_metadata_name()
assert_true(not attr.startswith("__"), "Invalid binary node name", DecodeError)
# Abuse the array here to maintain order
node.children.append(attr)
else:
node.children.append(self._read_metadata(child))
is_array = not not (type_ & ARRAY_BIT)
if is_array:
node.value = []
return node
def _read_databody(self, node: XMLNode):
self._read_node_value(node)
children = list(node.children)
node.children = []
for i in children:
if isinstance(i, XMLNode):
node.children.append(self._read_databody(i))
else:
node[i] = self.read("s")
return node
def _read_magic(self):
magic, contents, enc, enc_comp = struct.unpack(">BBBB", self.stream.read(4))
assert_true(magic == 0xA0, "Not a packet", DecodeError)
assert_true(~enc & 0xFF == enc_comp, "Malformed packet header", DecodeError)
assert_true(enc in ENCODING, "Unknown packet encoding", DecodeError)
assert_true(contents in CONTENT, "Invalid packet contents", DecodeError)
self.compressed = contents in CONTENT_COMP
self.has_data = contents in CONTENT_FULL or contents == 0x44
self.encoding = ENCODING[enc]
def _read_xml_string(self):
assert_true(etree is not None, "lxml missing", DecodeError)
parser = etree.XMLParser(remove_comments=True)
tree = etree.XML(self.stream.read(), parser)
self.encoding = XML_ENCODING[tree.getroottree().docinfo.encoding.upper()]
self.compressed = False
self.has_data = True
def walk(node):
attrib = {**node.attrib}
type_str = attrib.pop("__type", "void")
for i in Type:
if type_str in i.value.names:
type_ = i
break
else:
raise ValueError("Invalid node type")
attrib.pop("__size", None)
count = attrib.pop("__count", None)
is_array = count is not None
count = 1 if count is None else int(count)
d_type = type_.value
if d_type.size == 1 and not is_array:
value = d_type._parse(node.text or "")
else:
data = node.text.split(" ")
value = []
for i in range(0, len(data), d_type.size):
value.append(d_type._parse(data[i:i+d_type.size]))
if not is_array:
value = value[0]
xml_node = XMLNode(node.tag, type_, value, encoding=self.encoding)
for i in node.getchildren():
xml_node.children.append(walk(i))
for i in attrib:
xml_node[i] = unescape(attrib[i])
return xml_node
return walk(tree)
def unpack(self):
if self.is_xml_string:
return self._read_xml_string()
self._read_magic()
header_len = self.read("I")
start = self.stream.tell()
schema = self._read_metadata(self.read("B"))
assert_true(self.read("B") == END_DOC, "Unterminated schema", DecodeError)
padding = header_len - (self.stream.tell() - start)
assert_true(padding >= 0, "Invalid schema definition", DecodeError)
assert_true(all(i == 0 for i in self.stream.read(padding)), "Invalid schema padding", DecodeError)
body_len = self.read("I")
start = self.stream.tell()
self.packer = Packer(start)
data = self._read_databody(schema)
self.stream.seek(self.packer.request_allocation(0))
padding = body_len - (self.stream.tell() - start)
assert_true(padding >= 0, "Data shape not match schema", DecodeError)
assert_true(all(i == 0 for i in self.stream.read(padding)), "Invalid data padding", DecodeError)
assert_true(self.stream.read(1) == b"", "Trailing data unconsumed", DecodeError)
return data
__all__ = ("Decoder", )

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import struct
import io
from .packer import Packer
from .misc import pack, py_encoding, assert_true
from .const import (
PACK_ALPHABET, DEFAULT_ENCODING, ENCODING, ENCODING_BACK, NAME_MAX_DECOMPRESSED, ARRAY_BIT,
ATTR, END_NODE, END_DOC, CONTENT_COMP_FULL, CONTENT_COMP_SCHEMA, CONTENT_ASCII_FULL,
CONTENT_ASCII_SCHEMA
)
from .exception import EncodeError
class Encoder:
def __init__(self, encoding=DEFAULT_ENCODING):
self.stream = io.BytesIO()
assert_true(encoding in ENCODING_BACK, f"Unknown encoding {encoding}", EncodeError)
self.encoding = ENCODING_BACK[encoding]
self.packer = None
self._compressed = False
@classmethod
def encode(cls, tree, xml_string=False):
if xml_string:
return tree.to_str(pretty=False).encode(tree.encoding)
encoder = cls(tree.encoding)
encoder.pack(tree)
return encoder.stream.getvalue()
def align(self, to=4, pad_char=b"\0"):
if to < 2:
return
if (dist := self.stream.tell() % to) == 0:
return
self.stream.write(pad_char * (to - dist))
def write(self, s_format, value, single=True):
if s_format == "S":
self.write("L", len(value))
self.stream.write(value)
self.packer.notify_skipped(len(value))
return
if s_format == "s":
value = value.encode(py_encoding(ENCODING[self.encoding])) + b"\0"
self.write("L", len(value))
self.stream.write(value)
self.packer.notify_skipped(len(value))
return
length = struct.calcsize("=" + s_format)
if not isinstance(value, list):
value = [value]
count = len(value)
if count != 1:
self.write("L", count * length)
self.packer.notify_skipped(count * length)
for x in value:
if self.packer and count == 1:
self.stream.seek(self.packer.request_allocation(length))
try:
if single:
self.stream.write(struct.pack(f">{s_format}", x))
else:
self.stream.write(struct.pack(f">{s_format}", *x))
except struct.error:
raise ValueError(f"Failed to pack {s_format}: {repr(x)}")
def _write_node_value(self, type_, value):
fmt = type_.value.fmt
if fmt == "s":
self.write("s", value)
else:
self.write(fmt, value, single=len(fmt) == 1)
def _write_metadata_name(self, name):
if not self._compressed:
assert_true(len(name) <= NAME_MAX_DECOMPRESSED, "Name length too long", EncodeError)
if len(name) > 64:
self.write("H", len(name) + 0x7fbf)
else:
self.write("B", len(name) + 0x3f)
self.stream.write(name.encode(py_encoding(ENCODING[self.encoding])))
return
assert_true(all(i in PACK_ALPHABET for i in name), f"Invalid schema name {name} (invalid chars)", EncodeError)
assert_true(len(name) < 256, f"Invalid schema name {name} (too long)", EncodeError)
self.write("B", len(name))
if len(name) == 0:
return
name = bytearray(PACK_ALPHABET.index(i) for i in name)
self.stream.write(pack(name, 6))
def _write_metadata(self, node):
self.write("B", node.type.value.id | (ARRAY_BIT if node.is_array else 0x00))
self._write_metadata_name(node.name)
for attr in node.attributes:
self.write("B", ATTR)
self._write_metadata_name(attr)
for child in node:
self._write_metadata(child)
self.write("B", END_NODE)
def _write_databody(self, data):
self._write_node_value(data.type, data.value)
for attr in data.attributes:
self.align()
self.write("s", data[attr])
for child in data:
self._write_databody(child)
def _write_magic(self, has_data=True):
if has_data:
contents = CONTENT_COMP_FULL if self._compressed else CONTENT_ASCII_FULL
else:
contents = CONTENT_COMP_SCHEMA if self._compressed else CONTENT_ASCII_SCHEMA
enc_comp = ~self.encoding & 0xFF
self.stream.write(struct.pack(">BBBB", 0xA0, contents, self.encoding, enc_comp))
def pack(self, node):
self._compressed = node.can_compress # Opportunically compress if we can
self._write_magic()
schema_start = self.stream.tell()
self.write("I", 0)
self._write_metadata(node)
self.write("B", END_DOC)
self.align()
schema_end = self.stream.tell()
self.stream.seek(schema_start)
self.write("I", schema_end - schema_start - 4)
self.stream.seek(schema_end)
self.write("I", 0)
self.packer = Packer(self.stream.tell())
self._write_databody(node)
self.stream.seek(0, io.SEEK_END)
self.align()
node_end = self.stream.tell()
self.stream.seek(schema_end)
self.packer = None
self.write("I", node_end - schema_end - 4)
__all__ = ("Encoder", )

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class EAAPIException(Exception):
pass
class CheckFailed(EAAPIException):
pass
class InvalidCard(CheckFailed):
pass
class DecodeError(CheckFailed):
pass
class EncodeError(CheckFailed):
pass

5
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CARDCONV_KEY = b""
EA_KEY = b""
# Perhaps my [flag collection](https://bsnk.me/eamuse/flags.html) could be of interest
raise NotImplementedError

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from .misc import assert_true
WINDOW_SIZE = 0x1000
WINDOW_MASK = WINDOW_SIZE - 1
THRESHOLD = 3
INPLACE_THRESHOLD = 0xA
LOOK_RANGE = 0x200
MAX_LEN = 0xF + THRESHOLD
MAX_BUFFER = 0x10 + 1
def match_current(window, pos, max_len, data, dpos):
length = 0
while (
dpos + length < len(data)
and length < max_len
and window[(pos + length) & WINDOW_MASK] == data[dpos + length]
and length < MAX_LEN
):
length += 1
return length
def match_window(window, pos, data, d_pos):
max_pos = 0
max_len = 0
for i in range(THRESHOLD, LOOK_RANGE):
length = match_current(window, (pos - i) & WINDOW_MASK, i, data, d_pos)
if length >= INPLACE_THRESHOLD:
return (i, length)
if length >= THRESHOLD:
max_pos = i
max_len = length
if max_len >= THRESHOLD:
return (max_pos, max_len)
return None
def lz77_compress(data):
output = bytearray()
window = [0] * WINDOW_SIZE
current_pos = 0
current_window = 0
current_buffer = 0
flag_byte = 0
bit = 0
buffer = [0] * MAX_BUFFER
pad = 3
while current_pos < len(data):
flag_byte = 0
current_buffer = 0
for bit_pos in range(8):
if current_pos >= len(data):
pad = 0
flag_byte = flag_byte >> (8 - bit_pos)
buffer[current_buffer] = 0
buffer[current_buffer + 1] = 0
current_buffer += 2
break
else:
found = match_window(window, current_window, data, current_pos)
if found is not None and found[1] >= THRESHOLD:
pos, length = found
byte1 = pos >> 4
byte2 = (((pos & 0x0F) << 4) | ((length - THRESHOLD) & 0x0F))
buffer[current_buffer] = byte1
buffer[current_buffer + 1] = byte2
current_buffer += 2
bit = 0
for _ in range(length):
window[current_window & WINDOW_MASK] = data[current_pos]
current_pos += 1
current_window += 1
else:
buffer[current_buffer] = data[current_pos]
window[current_window] = data[current_pos]
current_pos += 1
current_window += 1
current_buffer += 1
bit = 1
flag_byte = (flag_byte >> 1) | ((bit & 1) << 7)
current_window = current_window & WINDOW_MASK
assert_true(current_buffer < MAX_BUFFER, f"current buffer {current_buffer} > max buffer {MAX_BUFFER}")
output.append(flag_byte)
for i in range(current_buffer):
output.append(buffer[i])
for _ in range(pad):
output.append(0)
return bytes(output)
def lz77_decompress(data):
output = bytearray()
cur_byte = 0
window = [0] * WINDOW_SIZE
window_cursor = 0
while cur_byte < len(data):
flag = data[cur_byte]
cur_byte += 1
for i in range(8):
if (flag >> i) & 1 == 1:
output.append(data[cur_byte])
window[window_cursor] = data[cur_byte]
window_cursor = (window_cursor + 1) & WINDOW_MASK
cur_byte += 1
else:
w = ((data[cur_byte]) << 8) | (data[cur_byte + 1])
if w == 0:
return bytes(output)
cur_byte += 2
position = ((window_cursor - (w >> 4)) & WINDOW_MASK)
length = (w & 0x0F) + THRESHOLD
for _ in range(length):
b = window[position & WINDOW_MASK]
output.append(b)
window[window_cursor] = b
window_cursor = (window_cursor + 1) & WINDOW_MASK
position += 1
return bytes(output)
__all__ = (
"lz77_compress", "lz77_decompress"
)

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import inspect
import re
from .exception import CheckFailed
def assert_true(check, reason, exc=CheckFailed):
if not check:
line = inspect.stack()[1].code_context
print()
print("\n".join(line))
raise exc(reason)
def py_encoding(name):
if name.startswith("shift-jis"):
return "shift-jis"
return name
def parse_model(model):
# e.g. KFC:J:A:A:2019020600
gamecode, dest, spec, rev, version = re.match(r"([A-Z0-9]{3}):([A-Z]):([A-Z]):([A-Z])(?::(\d{8}))?", model).groups()
return gamecode, dest, spec, rev, version
def pack(data, width):
assert_true(1 <= width <= 8, "Invalid pack size")
assert_true(all(i < (1 << width) for i in data), "Data too large for packing")
bit_buf = in_buf = 0
output = bytearray()
for i in data:
bit_buf |= i << (8 - width)
shift = min(8 - in_buf, width)
bit_buf <<= shift
in_buf += shift
if in_buf == 8:
output.append(bit_buf >> 8)
in_buf = width - shift
bit_buf = (bit_buf & 0xff) << in_buf
if in_buf:
output.append(bit_buf >> in_buf)
return bytes(output)
def unpack(data, width):
assert_true(1 <= width <= 8, "Invalid pack size")
bit_buf = in_buf = 0
output = bytearray()
for i in data:
bit_buf |= i
bit_buf <<= width - in_buf
in_buf += 8
while in_buf >= width:
output.append(bit_buf >> 8)
in_buf -= width
bit_buf = (bit_buf & 0xff) << min(width, in_buf)
if in_buf:
output.append(bit_buf >> (8 + in_buf - width))
return bytes(output)
__all__ = ("assert_true", "py_encoding", "parse_model", "pack", "unpack")

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import binascii
import re
from html import escape
from .misc import assert_true
from .const import DEFAULT_ENCODING, NAME_MAX_COMPRESSED, XML_ENCODING_BACK, Type
class XMLNode:
def __init__(self, name, type_, value, attributes=None, encoding=DEFAULT_ENCODING):
self.name = name
self.type = type_ if isinstance(type_, Type) else Type.from_val(type_)
self.value = value
self.children = []
self.attributes = {}
if attributes is not None:
for i in attributes:
self.attributes[i] = attributes[i]
self.encoding = encoding or DEFAULT_ENCODING
assert_true(encoding in XML_ENCODING_BACK, "Invalid encoding")
@classmethod
def void(cls, __name, **attributes):
return cls(__name, Type.Void, (), attributes)
@property
def is_array(self):
return isinstance(self.value, list)
@property
def can_compress(self):
return (
(len(self.name) <= NAME_MAX_COMPRESSED)
and all(i.can_compress for i in self.children)
)
def _xpath(self, attr, path):
if path:
child = path.pop(0)
for i in self.children:
if i.name == child:
return i._xpath(attr, path)
raise IndexError
if not attr:
return self
if attr in self.attributes:
return self.attributes[attr]
raise IndexError
def xpath(self, path):
match = re.match(r"^(?:@([\w:]+)/)?((?:[\w:]+(?:/|$))+)", path)
if match is None:
raise ValueError
attr = match.group(1)
path = match.group(2).split("/")
return self._xpath(attr, path)
def append(self, __name, __type=Type.Void, __value=(), **attributes):
child = XMLNode(__name, __type, __value, attributes)
self.children.append(child)
return child
def __len__(self):
return len(self.children)
def __iter__(self):
for i in self.children:
yield i
def __getitem__(self, name):
if isinstance(name, int):
return self.children[name]
return self.attributes[name]
def __setitem__(self, name, value):
self.attributes[name] = value
def to_str(self, pretty=False):
return (
f'<?xml version="1.0" encoding="{XML_ENCODING_BACK[self.encoding]}"?>'
+ ("\n" if pretty else "")
+ self._to_str(pretty)
)
def __str__(self):
return self.to_str(pretty=True)
def _value_str(self, value):
if isinstance(value, list):
return " ".join(map(self._value_str, value))
if self.type == Type.Blob:
return binascii.hexlify(value).decode()
if self.type == Type.IPv4:
return f"{value[0]}.{value[1]}.{value[2]}.{value[3]}"
if self.type in (Type.Float, Type.TwoFloat, Type.ThreeFloat):
return f"{value:.6f}"
if self.type == Type.Str:
return escape(str(value))
return str(value)
def _to_str(self, pretty, indent=0):
if not pretty:
indent = 0
nl = "\n" if pretty else ""
tag = f"{' ' * indent}<{self.name}"
if self.type != Type.Void:
tag += f" __type=\"{self.type.value.names[0]}\""
if self.type == Type.Blob:
tag += f" __size=\"{len(self.value)}\""
if self.is_array:
tag += f" __count=\"{len(self.value)}\""
attributes = " ".join(f"{i}=\"{escape(j)}\"" for i, j in self.attributes.items())
if attributes:
tag += " " + attributes
tag += ">"
if self.value is not None and self.type != Type.Void:
if self.is_array:
tag += " ".join(map(self._value_str, self.value))
else:
tag += self._value_str(self.value)
elif not self.children:
return tag[:-1] + (" " if pretty else "") + "/>"
for i in self.children:
if isinstance(i, XMLNode):
tag += nl + i._to_str(pretty, indent + 4)
if self.children:
tag += nl + " " * indent
tag += f"</{self.name}>"
return tag
def __eq__(self, other):
return (
isinstance(other, XMLNode)
and self.name == other.name
and self.type == other.type
and self.value == other.value
and len(self.children) == len(other.children)
and all(i == j for i, j in zip(self.children, other.children))
)
__all__ = ("XMLNode", )

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import math
class Packer:
def __init__(self, offset=0):
self._word_cursor = offset
self._short_cursor = offset
self._byte_cursor = offset
self._boundary = offset % 4
def _next_block(self):
self._word_cursor += 4
return self._word_cursor - 4
def request_allocation(self, size):
if size == 0:
return self._word_cursor
elif size == 1:
if self._byte_cursor % 4 == self._boundary:
self._byte_cursor = self._next_block() + 1
else:
self._byte_cursor += 1
return self._byte_cursor - 1
elif size == 2:
if self._short_cursor % 4 == self._boundary:
self._short_cursor = self._next_block() + 2
else:
self._short_cursor += 2
return self._short_cursor - 2
else:
old_cursor = self._word_cursor
for _ in range(math.ceil(size / 4)):
self._word_cursor += 4
return old_cursor
def notify_skipped(self, no_bytes):
for _ in range(math.ceil(no_bytes / 4)):
self.request_allocation(4)
__all__ = ("Packer", )

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from .crypt import ea_symmetric_crypt
from .lz77 import lz77_compress, lz77_decompress
def wrap(packet, info=None, compressed=True):
if compressed:
packet = lz77_compress(packet)
if info is None:
return packet
return ea_symmetric_crypt(packet, info)
def unwrap(packet, info=None, compressed=True):
if info is None:
decrypted = packet
else:
decrypted = ea_symmetric_crypt(packet, info)
if compressed is None:
try:
decompressed = lz77_decompress(decrypted)
except IndexError:
return decrypted
if decompressed == b"\0\0\0\0\0\0":
# Decompression almost certainly failed
return decrypted
return decompressed
return lz77_decompress(decrypted) if compressed else decrypted
__all__ = ("wrap", "unwrap")

2
requirements.txt Normal file
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pycryptodome
lxml

6
setup.py Normal file
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from distutils.core import setup
setup(
name="eaapi",
packages=["eaapi"],
)

0
tests/__init__.py Normal file
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15
tests/test_cardconv.py Normal file
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import unittest
from eaapi.cardconv import konami_to_uid, uid_to_konami
class TestCardconv(unittest.TestCase):
def test_uid_to_konami(self):
# return
self.assertEqual(uid_to_konami("E004000000000000"), "YYBXDXH1U015BA1D")
self.assertEqual(uid_to_konami("0000000000000000"), "007TUT8XJNSSPN2P")
def test_konami_to_uid(self):
# return
self.assertEqual(konami_to_uid("YYBXDXH1U015BA1D"), "E004000000000000")
self.assertEqual(konami_to_uid("007TUT8XJNSSPN2P"), "0000000000000000")

23
tests/test_decoder.py Normal file
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import unittest
from eaapi.decoder import Decoder
class TestDecoder(unittest.TestCase):
def test_packed_names(self):
decoder = Decoder(b"\x13\xe6\xda\xa5\xdb\xab\xa8\xc2\x59\xf7\xd3\xcc\xe5\xaf\x4f\x40")
decoder.compressed = True
self.assertEqual(decoder._read_metadata_name(), "the_quick_brown_fox")
def test_short_ascii_names(self):
decoder = Decoder(b"\x52the_quick_brown_fox")
decoder.encoding = "shift-jis"
self.assertEqual(decoder._read_metadata_name(), "the_quick_brown_fox")
def test_long_ascii_names(self):
decoder = Decoder(b"\x80\x87" + b"the_quick_brown_fox_" * 10)
decoder.encoding = "shift-jis"
self.assertEqual(decoder._read_metadata_name(), "the_quick_brown_fox_" * 10)

35
tests/test_encoder.py Normal file
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import unittest
from eaapi.encoder import Encoder
class TestEncoder(unittest.TestCase):
def test_packed_names(self):
encoder = Encoder()
encoder._compressed = True
encoder._write_metadata_name("the_quick_brown_fox")
self.assertEqual(
encoder.stream.getvalue(),
b"\x13\xe6\xda\xa5\xdb\xab\xa8\xc2\x59\xf7\xd3\xcc\xe5\xaf\x4f\x40"
)
def test_short_ascii_names(self):
encoder = Encoder()
encoder._write_metadata_name("the_quick_brown_fox")
self.assertEqual(
encoder.stream.getvalue(),
b"\x52the_quick_brown_fox"
)
def test_long_ascii_names(self):
encoder = Encoder()
encoder._write_metadata_name("the_quick_brown_fox_" * 10)
value = encoder.stream.getvalue()
self.assertEqual(value[:2], b"\x80\x87")
self.assertEqual(value[2:], b"the_quick_brown_fox_" * 10)

41
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import unittest
from eaapi.misc import pack, unpack
class TestPackUnpack(unittest.TestCase):
def test_pack_2(self):
self.assertEqual(
pack(b"\0\1\2\3\3\2\1\0", 2),
b"\x1b\xe4"
)
def test_pack_4(self):
self.assertEqual(
pack(b"\0\1\2\3\4\5\6\7", 4),
b"\x01\x23\x45\x67"
)
def test_pack_5(self):
self.assertEqual(
pack(b"\0\1\2\3\4\5\6\7", 5),
b"\x00\x44\x32\x14\xc7"
)
def test_unpack_2(self):
self.assertEqual(
unpack(b"\x1b\xe4", 2),
b"\0\1\2\3\3\2\1\0"
)
def test_unpack_4(self):
self.assertEqual(
unpack(b"\x01\x23\x45\x67", 4),
b"\0\1\2\3\4\5\6\7"
)
def test_unpack_5(self):
self.assertEqual(
unpack(b"\x00\x44\x32\x14\xc7", 5),
b"\0\1\2\3\4\5\6\7"
)

137
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import binascii
import unittest
from eaapi import unwrap, wrap, Encoder, Decoder
TEST_CASES = [
(
binascii.unhexlify(
"13c5e3a34517cdaa9e41aa052f2edbc1f36df913fd5e512bb4a33f21e52b9474a2ab579126654757cd31bd326c0957246c69be6d77"
"4719a2a2c4f37ff56429bc7bfa02519ddc5079306f383f8d5664c8250a9bd181363a637cb76acff65c877984c58e1fad2834d1cbfc"
"2bd25d19f07bce3f3fb4886beca3079439a2a38e9a2cc9081d4a364617e27ef4d6981f33d9cf157190bd8da6ebad6dcb9c26523c58"
"d0ae6092e93432f43aac2b61e1fc96a538ac2f77de8fd2b52b2a2c882b208ebe8922dbdb9148703a5e03be1ff2e45cfc55dd83964f"
"d7e1a443227dfdb13917872919f904d14f2ff5cfc3eb8613db2da01d9940f44d48e2"
),
"1-61bb5f0d-5866"
),
(
binascii.unhexlify(
"7e7ec6e960ab49372b054cb56a6378f65ac954aa010e61e67f313694435e3154ab522324ae0d709f156630c65f97e6a1c26f55afdc"
"51ab3e651c7c1b13624729bfc6e9f1642850fbf74de1454e167ecc82cee6b6318101de3d18e21b0f157a1226d28eff15f9dc31649c"
"b7e59689f01b5a32ced864976077d7b65dcb0c09370cfe646dc0594d26b52e9426bd0f7bf9b17c35f65c02886b907dfbe57db4a525"
"786d83bef400414fe24e02a6b830e731430b6584c7751f096e"
),
"1-61bb6908-16ae"
),
(
binascii.unhexlify(
"f444818c52c84d99329099bf06c98ff02b8784bd9ac939c371646c3b918a262a55cdfb98e1f378d689c2e3afafe067066e986fcf85"
"6b870925e1ac0252daec1db455baff064240060b2cb36d35d841bb0049af858ed513385cab964770fbc63d3c29313e83c9aaf696ea"
"b5a0da4a8b06a1f41062624d0ff66e99b533618ac48dda47f4028a88888f667c81669c9e2c69f01c8725965475faec3347f9770e13"
"3c61eb4dbf9a02378f9a2e44e616470338cf59ff004eae170f3a6cfe14ba777d8d0b7638f1164101854d5f29d4b85aa3020621c798"
),
"1-61bb6ab6-840c"
),
(
binascii.unhexlify(
"e638577a7b262667f9dca0a137bf7767627d86695a2a13dbdf7338a9076c4e3b7e85f145fa7b2a9106062f3490ed160e4882a943ab"
"f4e3b26e66daee00fc7b3dfe7fc0624251c44582214c7532a90d2a9afe1a1dfe17369f803522a574aaf4fd4a484417ae5b57aab315"
"50e398282f06f859f40e"
),
"1-8d578a33-ca84"
),
(
binascii.unhexlify(
"9c593d03ae5979b150067743d3f29aaeb31888b6ad5aee21f654ea9274c09cdedc727a6d34052a5f2eed4b91ffb5cb7750bbed1bd4"
"ebe91c781fcd4c172680fb4343c25862e57efe52c2363c0bdb83282534541dfd4cb39ab6a3a74c80e31b31537e0f407af70c90fe9e"
"f8b4cb05c2e0d247666847669744cda5881f4c3658507d5806cb16520211689a64d6dfda72a5503f159633c1eb7eba68553d3b2e7c"
"008c137feffcae5923d8aa1b21137fd538651bad6a4de47d2021bcf59c7d9364b9ddf9330d730c34e86e273b414b4b26c1b468d06c"
"5de95d64f848bfdc1de75f3e79ddf74872459a690605675dee206c47d44f46dfbd56b95b8c670357f3a426e1a2aded8107b0dddb79"
"d33b2eb4608419ec84a004c17f7d289991922d3fbab8f5a57dfd6fba7ca9c33ca93b62aca8a0f4f83cfd30ef993284f0213d2d9f29"
"e7e839a7eb97314ee37b59dcab39c00b7351579833e7cf5cad52f9cd9d1cd0ca979a0b8c0770a72d14fb616ea2c8de8aa01d3e44e0"
"5bcfd6555026931b8f72329ed53e3a0d21021485a0ecdae791a8885cb7bd021e3b4d8412f2991350f1ad7f1c225754c17ce7c29238"
"1046aca3967d80e67e58d0ba22f25799a2257eac0759c0f7ba3e000d140ab415b58177d3f8bc343d913ddd7aba2f5f954947e7b51d"
"1b0aad61114936eed8f58c48e9345f81d4001c634b31efe4f7a6661fa1c79b384dcbeeca0ca74533a3dd8db8980b3e5dfe39248de2"
"56bd16ff0a5eb143fb977fafee7908ee7735b281c8fe986fb853bfe29f22e27cda5d3d173fff83d00a17b837d83355a16ffe87cc1d"
"4bf04d77c2d6addc22f3c461ef0192010469cfa6d3b23f414e38bd93a23b30b9c3b4b6db0c95352e48c3a547ac97803c7fb8f22e10"
"ab26e2f76d8c94321dd9779f0cce5ba7b7c960c7c4c230835e8782703a32ed108b990865e616709aab4ad67518ee255efaee20ee91"
"8a894fc4a9d98ef662c442ed9ac9db318f264633a7ec5dc88ffe22d18de9fee316c4037a4be6b99540ce2bbdb3fcdfabb0da04"
),
"1-61bb68ff-156b"
),
(
binascii.unhexlify(
"f193f0970472de5897182faecd8536cc8dbfada5657e788263b57a91e6890302f4235942268cd8b9599ccc0a8638769229ed69856f"
"adfb15cc0e4828f035814ce41f5a419d969a6dba94cf0b4af831f0674ed56516ccf2c0720ce232a9dced53dfbeba3b0cb5aa933632"
"7ad8a9c2ea8c45c4b7233d1d60d48b82a78183f48b813ec3fa798f01c167d2ec1bc554f96c6f1064602c37a4445933ae06f7fd0c81"
"35036e5399682af75f7f35a75d83b6a1da836245af084fd1dd779abda0334eefdef7e442d421"
),
"1-61ccf054-a8b3"
),
(
binascii.unhexlify(
"2b06d34e48babb9cf4a015f44e3e079d6ca547e54a2e0f5a2e2e5572b1587e9f886697f2654757647c654549c420c39984fc6c3d08"
"92a5ec88dd7a5645123629ec769db2505de90b380dff6da3249af1bc273dcf9f4d3cbdb596d0a08cd41369d763f28a4241ee567e91"
"511b692e9ebe07206b97a3086dd197074a01025d47b315a7997a0b695f6513aaefb9d2a281e1f7d621f01c9cd0ed1f26547807a85b"
"45838302319579deab1cd3ebaee5fb9c53694ca6817ba0fa655a2c3415127ceeff4f357850b4f4af979628829a3b8ab5ee4443e796"
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