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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -4,6 +4,6 @@ | |
| !file_formats/*.py | ||
| !protocols | ||
| !protocols/*.py | ||
| !example*.py | ||
| !tuto*.py | ||
| !tutorial | ||
| !tutorial/*.py | ||
| !__init__.py | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| ################################################################################ | ||
| # | ||
| # Copyright 2018 Eric Lacombe <eric.lacombe@security-labs.org> | ||
| # | ||
| ################################################################################ | ||
| # | ||
| # This file is part of fuddly. | ||
| # | ||
| # fuddly is free software: you can redistribute it and/or modify | ||
| # it under the terms of the GNU General Public License as published by | ||
| # the Free Software Foundation, either version 3 of the License, or | ||
| # (at your option) any later version. | ||
| # | ||
| # fuddly is distributed in the hope that it will be useful, | ||
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| # GNU General Public License for more details. | ||
| # | ||
| # You should have received a copy of the GNU General Public License | ||
| # along with fuddly. If not, see <http://www.gnu.org/licenses/> | ||
| # | ||
| ################################################################################ | ||
|
|
||
| from framework.value_types import * | ||
| from framework.data_model import * | ||
| from framework.encoders import * | ||
|
|
||
| class MyProto_DataModel(DataModel): | ||
|
|
||
| name = 'myproto' | ||
|
|
||
| def build_data_model(self): | ||
|
|
||
| req_desc = \ | ||
| {'name': 'req', | ||
| 'contents': [ | ||
| {'name': 'header', | ||
| 'contents': BitField(subfield_sizes=[5,7,4], endian=VT.BigEndian, | ||
| subfield_values=[[0], [1,10,20], [1,2,3]], | ||
| subfield_descs=['reserved', 'cmd', 'version'])}, | ||
|
|
||
| {'name': 'init', | ||
| 'exists_if': (BitFieldCondition(sf=1, val=[1]), 'header'), | ||
| 'contents': TIMESTAMP("%H:%M:%S"), | ||
| 'absorb_csts': AbsFullCsts(contents=False)}, | ||
|
|
||
| {'name': 'register', | ||
| 'custo_clear': MH.Custo.NTerm.FrozenCopy, | ||
| 'exists_if': (BitFieldCondition(sf=1, val=10), 'header'), | ||
| 'contents': [ | ||
| {'name': 'payload', | ||
| 'contents': [ | ||
| {'name': 'file_qty', | ||
| 'contents': UINT16_be(min=2, max=8)}, | ||
| {'name': 'file_entry', | ||
| 'qty_from': 'file_qty', | ||
| 'contents': [ | ||
| {'name': 'filename', | ||
| 'contents': Filename(min_sz=1, max_sz=15, alphabet='abcdef')}, | ||
| {'name': 'len', | ||
| 'contents': UINT32_be()}, | ||
| {'name': 'content', | ||
| 'sync_size_with': 'len', | ||
| 'contents': String(min_sz=20, max_sz=50, alphabet='éùijklm:;!', | ||
| codec='latin-1')}, | ||
| {'name': 'crc32', | ||
| 'contents': CRC(vt=UINT32_be), | ||
| 'node_args': ['filename', 'content']}, | ||
| ]} | ||
| ]} | ||
| ]}, | ||
|
|
||
| {'name': 'zregister', | ||
| 'exists_if/and': [(BitFieldCondition(sf=1, val=20), 'header'), | ||
| (BitFieldCondition(sf=2, val=3), 'header')], | ||
| 'encoder': GZIP_Enc(6), | ||
| 'contents': [ | ||
| {'name': 'zpayload', 'clone': 'payload'} | ||
| ]}, | ||
|
|
||
| ]} | ||
|
|
||
| req_atom = NodeBuilder(add_env=True).create_graph_from_desc(req_desc) | ||
|
|
||
| init_atom = req_atom.get_clone('init', ignore_frozen_state=True) | ||
| init_atom['.*/header'].set_subfield(idx=1, val=1) | ||
| init_atom.unfreeze(recursive=True) | ||
| register_atom = req_atom.get_clone('register', ignore_frozen_state=True) | ||
| register_atom['.*/header'].set_subfield(idx=1, val=10) | ||
| register_atom.unfreeze(recursive=True) | ||
| zregister_atom = req_atom.get_clone('zregister', ignore_frozen_state=True) | ||
| zregister_atom['.*/header'].set_subfield(idx=1, val=20) | ||
| zregister_atom['.*/header'].set_subfield(idx=2, val=3) | ||
| zregister_atom.unfreeze(recursive=True) | ||
|
|
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| self.register(req_atom, init_atom, register_atom, zregister_atom) | ||
|
|
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| def validation_tests(self): | ||
|
|
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| data = [b'\x10 17:20:47', | ||
|
|
||
| b'!@\x00\x02dffdecbcaab\x00\x00\x00/i\xe9!mkikl!jilmm!\xe9ml\xe9:;;\xe9\xe9' | ||
| b'\xe9kki\xf9!j\xf9j\xf9k\xf9::ji!!m:j:!\xcc\xc0\xc4\xedfab\x00\x00\x00*mmk!i;j' | ||
| b'\xf9\xe9\xe9!il;;m;\xe9!!l;ijklikl!kmlk\xf9!:;;jmmB\x8d8\x11', | ||
|
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||
| b'2\x80x\x9c%\x8e!\x0e\x02Q\x0cDW`\xf08\xd4\xc7\x82\xc1\xb6\xa7@\xa36\xbbl2\xd36{' | ||
| b',\x8e\xc0\x018\x03\x87\xa8D ' | ||
| b'\xea\xf8\x04;y\xf3\xf2\x86\xcd\xbcL\xf3\xb8\x0c\xc3p\xa0jc\x1aQ\xae\xa5\rQ\x91' | ||
| b'\x91"&\x92\xcd\xa3\xcf\xfb;\xfd\xb6\x8c\x1d>1\x85\x9a%\xca\xa4\x1b\n\xe6\xc5,' | ||
| b'U\x83\xabe\x13z\x98"\xcd\x9d\xd7\xe7\x87\xcb\xd4_\xbb\xce\xfd\xd4\xaaR\x9a\x99N' | ||
| b'\xc0\xd7\xed\xeb\xfd\x97\x9e\xa1&*A\xba$M`\x16@R\n\xbd\xa3\xc1\xa2\x05\xe1\x110' | ||
| b'\x96[\xb5\xba<\xd6\xe3\x17\x1c\xe3Sj '] | ||
|
|
||
| ok = True | ||
|
|
||
| for d in data: | ||
| atom = self.get_atom('req') | ||
| status, off, size, name = atom.absorb(d, constraints=AbsFullCsts()) | ||
| if status != AbsorbStatus.FullyAbsorbed: | ||
| ok = False | ||
|
|
||
| print('Absorb Status: {!r}, {:d}, {:d}, {:s}'.format(status, off, size, name)) | ||
| print(' \_ length of original data: {:d}'.format(len(d))) | ||
| print(' \_ remaining: {!r}'.format(d[size:size+1000])) | ||
|
|
||
| atom.show() | ||
|
|
||
| return ok | ||
|
|
||
|
|
||
| data_model = MyProto_DataModel() |
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