1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
|
# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
from pkg_resources import parse_version
from .kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO
from enum import Enum
import collections
if parse_version(ks_version) < parse_version('0.7'):
raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version))
class Rar(KaitaiStruct):
"""RAR is a archive format used by popular proprietary RAR archiver,
created by Eugene Roshal. There are two major versions of format
(v1.5-4.0 and RAR v5+).
File format essentially consists of a linear sequence of
blocks. Each block has fixed header and custom body (that depends on
block type), so it's possible to skip block even if one doesn't know
how to process a certain block type.
.. seealso::
- http://acritum.com/winrar/rar-format
"""
class BlockTypes(Enum):
marker = 114
archive_header = 115
file_header = 116
old_style_comment_header = 117
old_style_authenticity_info_76 = 118
old_style_subblock = 119
old_style_recovery_record = 120
old_style_authenticity_info_79 = 121
subblock = 122
terminator = 123
class Oses(Enum):
ms_dos = 0
os_2 = 1
windows = 2
unix = 3
mac_os = 4
beos = 5
class Methods(Enum):
store = 48
fastest = 49
fast = 50
normal = 51
good = 52
best = 53
SEQ_FIELDS = ["magic", "blocks"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['magic']['start'] = self._io.pos()
self.magic = self._root.MagicSignature(self._io, self, self._root)
self.magic._read()
self._debug['magic']['end'] = self._io.pos()
self._debug['blocks']['start'] = self._io.pos()
self.blocks = []
i = 0
while not self._io.is_eof():
if not 'arr' in self._debug['blocks']:
self._debug['blocks']['arr'] = []
self._debug['blocks']['arr'].append({'start': self._io.pos()})
_on = self.magic.version
if _on == 0:
if not 'arr' in self._debug['blocks']:
self._debug['blocks']['arr'] = []
self._debug['blocks']['arr'].append({'start': self._io.pos()})
_t_blocks = self._root.Block(self._io, self, self._root)
_t_blocks._read()
self.blocks.append(_t_blocks)
self._debug['blocks']['arr'][len(self.blocks) - 1]['end'] = self._io.pos()
elif _on == 1:
if not 'arr' in self._debug['blocks']:
self._debug['blocks']['arr'] = []
self._debug['blocks']['arr'].append({'start': self._io.pos()})
_t_blocks = self._root.BlockV5(self._io, self, self._root)
_t_blocks._read()
self.blocks.append(_t_blocks)
self._debug['blocks']['arr'][len(self.blocks) - 1]['end'] = self._io.pos()
self._debug['blocks']['arr'][len(self.blocks) - 1]['end'] = self._io.pos()
i += 1
self._debug['blocks']['end'] = self._io.pos()
class BlockV5(KaitaiStruct):
SEQ_FIELDS = []
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
pass
class Block(KaitaiStruct):
"""Basic block that RAR files consist of. There are several block
types (see `block_type`), which have different `body` and
`add_body`.
"""
SEQ_FIELDS = ["crc16", "block_type", "flags", "block_size", "add_size", "body", "add_body"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['crc16']['start'] = self._io.pos()
self.crc16 = self._io.read_u2le()
self._debug['crc16']['end'] = self._io.pos()
self._debug['block_type']['start'] = self._io.pos()
self.block_type = KaitaiStream.resolve_enum(self._root.BlockTypes, self._io.read_u1())
self._debug['block_type']['end'] = self._io.pos()
self._debug['flags']['start'] = self._io.pos()
self.flags = self._io.read_u2le()
self._debug['flags']['end'] = self._io.pos()
self._debug['block_size']['start'] = self._io.pos()
self.block_size = self._io.read_u2le()
self._debug['block_size']['end'] = self._io.pos()
if self.has_add:
self._debug['add_size']['start'] = self._io.pos()
self.add_size = self._io.read_u4le()
self._debug['add_size']['end'] = self._io.pos()
self._debug['body']['start'] = self._io.pos()
_on = self.block_type
if _on == self._root.BlockTypes.file_header:
self._raw_body = self._io.read_bytes(self.body_size)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BlockFileHeader(io, self, self._root)
self.body._read()
else:
self.body = self._io.read_bytes(self.body_size)
self._debug['body']['end'] = self._io.pos()
if self.has_add:
self._debug['add_body']['start'] = self._io.pos()
self.add_body = self._io.read_bytes(self.add_size)
self._debug['add_body']['end'] = self._io.pos()
@property
def has_add(self):
"""True if block has additional content attached to it."""
if hasattr(self, '_m_has_add'):
return self._m_has_add if hasattr(self, '_m_has_add') else None
self._m_has_add = (self.flags & 32768) != 0
return self._m_has_add if hasattr(self, '_m_has_add') else None
@property
def header_size(self):
if hasattr(self, '_m_header_size'):
return self._m_header_size if hasattr(self, '_m_header_size') else None
self._m_header_size = (11 if self.has_add else 7)
return self._m_header_size if hasattr(self, '_m_header_size') else None
@property
def body_size(self):
if hasattr(self, '_m_body_size'):
return self._m_body_size if hasattr(self, '_m_body_size') else None
self._m_body_size = (self.block_size - self.header_size)
return self._m_body_size if hasattr(self, '_m_body_size') else None
class BlockFileHeader(KaitaiStruct):
SEQ_FIELDS = ["low_unp_size", "host_os", "file_crc32", "file_time", "rar_version", "method", "name_size", "attr", "high_pack_size", "file_name", "salt"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['low_unp_size']['start'] = self._io.pos()
self.low_unp_size = self._io.read_u4le()
self._debug['low_unp_size']['end'] = self._io.pos()
self._debug['host_os']['start'] = self._io.pos()
self.host_os = KaitaiStream.resolve_enum(self._root.Oses, self._io.read_u1())
self._debug['host_os']['end'] = self._io.pos()
self._debug['file_crc32']['start'] = self._io.pos()
self.file_crc32 = self._io.read_u4le()
self._debug['file_crc32']['end'] = self._io.pos()
self._debug['file_time']['start'] = self._io.pos()
self.file_time = self._root.DosTime(self._io, self, self._root)
self.file_time._read()
self._debug['file_time']['end'] = self._io.pos()
self._debug['rar_version']['start'] = self._io.pos()
self.rar_version = self._io.read_u1()
self._debug['rar_version']['end'] = self._io.pos()
self._debug['method']['start'] = self._io.pos()
self.method = KaitaiStream.resolve_enum(self._root.Methods, self._io.read_u1())
self._debug['method']['end'] = self._io.pos()
self._debug['name_size']['start'] = self._io.pos()
self.name_size = self._io.read_u2le()
self._debug['name_size']['end'] = self._io.pos()
self._debug['attr']['start'] = self._io.pos()
self.attr = self._io.read_u4le()
self._debug['attr']['end'] = self._io.pos()
if (self._parent.flags & 256) != 0:
self._debug['high_pack_size']['start'] = self._io.pos()
self.high_pack_size = self._io.read_u4le()
self._debug['high_pack_size']['end'] = self._io.pos()
self._debug['file_name']['start'] = self._io.pos()
self.file_name = self._io.read_bytes(self.name_size)
self._debug['file_name']['end'] = self._io.pos()
if (self._parent.flags & 1024) != 0:
self._debug['salt']['start'] = self._io.pos()
self.salt = self._io.read_u8le()
self._debug['salt']['end'] = self._io.pos()
class MagicSignature(KaitaiStruct):
"""RAR uses either 7-byte magic for RAR versions 1.5 to 4.0, and
8-byte magic (and pretty different block format) for v5+. This
type would parse and validate both versions of signature. Note
that actually this signature is a valid RAR "block": in theory,
one can omit signature reading at all, and read this normally,
as a block, if exact RAR version is known (and thus it's
possible to choose correct block format).
"""
SEQ_FIELDS = ["magic1", "version", "magic3"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['magic1']['start'] = self._io.pos()
self.magic1 = self._io.ensure_fixed_contents(b"\x52\x61\x72\x21\x1A\x07")
self._debug['magic1']['end'] = self._io.pos()
self._debug['version']['start'] = self._io.pos()
self.version = self._io.read_u1()
self._debug['version']['end'] = self._io.pos()
if self.version == 1:
self._debug['magic3']['start'] = self._io.pos()
self.magic3 = self._io.ensure_fixed_contents(b"\x00")
self._debug['magic3']['end'] = self._io.pos()
class DosTime(KaitaiStruct):
SEQ_FIELDS = ["time", "date"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['time']['start'] = self._io.pos()
self.time = self._io.read_u2le()
self._debug['time']['end'] = self._io.pos()
self._debug['date']['start'] = self._io.pos()
self.date = self._io.read_u2le()
self._debug['date']['end'] = self._io.pos()
@property
def month(self):
if hasattr(self, '_m_month'):
return self._m_month if hasattr(self, '_m_month') else None
self._m_month = ((self.date & 480) >> 5)
return self._m_month if hasattr(self, '_m_month') else None
@property
def seconds(self):
if hasattr(self, '_m_seconds'):
return self._m_seconds if hasattr(self, '_m_seconds') else None
self._m_seconds = ((self.time & 31) * 2)
return self._m_seconds if hasattr(self, '_m_seconds') else None
@property
def year(self):
if hasattr(self, '_m_year'):
return self._m_year if hasattr(self, '_m_year') else None
self._m_year = (((self.date & 65024) >> 9) + 1980)
return self._m_year if hasattr(self, '_m_year') else None
@property
def minutes(self):
if hasattr(self, '_m_minutes'):
return self._m_minutes if hasattr(self, '_m_minutes') else None
self._m_minutes = ((self.time & 2016) >> 5)
return self._m_minutes if hasattr(self, '_m_minutes') else None
@property
def day(self):
if hasattr(self, '_m_day'):
return self._m_day if hasattr(self, '_m_day') else None
self._m_day = (self.date & 31)
return self._m_day if hasattr(self, '_m_day') else None
@property
def hours(self):
if hasattr(self, '_m_hours'):
return self._m_hours if hasattr(self, '_m_hours') else None
self._m_hours = ((self.time & 63488) >> 11)
return self._m_hours if hasattr(self, '_m_hours') else None
|
