-
Notifications
You must be signed in to change notification settings - Fork 75
/
Copy pathvx_base_target.py
268 lines (237 loc) · 10.5 KB
/
vx_base_target.py
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
# !/usr/bin/env python2
# coding=utf-8
from serialtube import serialtube
import logging
# init serial
serial_port = "/dev/tty.usbserial-AI069JDS"
start_address = 0x80001000
length = 0x24ab00
interval = 0x100
dump_data = ''
class VxSerialBaseTarget(object):
def __init__(self, serial=None, serial_until='\r\n#', logger=None):
""" Base VxSerial Target, used to provide memory read/write functions.
:param serial: serialtube object.
:param logger: logger for the target (default: None)
"""
if isinstance(serial, serialtube):
self.serial = serial
else:
self.serial = None
self.mem_cache_data = {}
self.serial_until = serial_until
if logger is None:
self.logger = logging.getLogger('target')
self.logger.setLevel(logging.INFO)
console_handler = logging.StreamHandler()
console_format = logging.Formatter('[%(levelname)-8s][%(module)s.%(funcName)s] %(message)s')
console_handler.setFormatter(console_format)
self.logger.addHandler(console_handler)
else:
self.logger = logger
def setup_serial(self, serial_path, baudrate=115200, **kwargs):
try:
self.serial = serialtube(port=serial_path, baudrate=baudrate, **kwargs)
except Exception as err:
self.logger.error("Serial setup fail because of: {}".format(err))
self.serial = None
def check_serial_alive(self):
if self.serial:
return True
self.logger.error("Please setup the serial port using setup_serial function first!")
return False
def send_and_recvuntil(self, data, until='\r\n#', timeout=3):
"""
:param data: Data to send.
:param until: Receive until characters (default: '\r\n#')
:param timeout: Timeout.
:return: Response Data
"""
if not self.check_serial_alive():
return None
self.serial.sendlinethen(data="", delim=until, timeout=timeout)
self.logger.debug("send data: %s" % data)
rsp_data = self.serial.sendlinethen(data=data, delim=until, timeout=timeout)
self.logger.debug("rsp_data: %s" % rsp_data)
if data not in rsp_data:
self.logger.debug('Target might crash, reset target cmd')
self.reset_shell()
return self.send_and_recvuntil(data, until)
return rsp_data
def reset_shell(self):
"""Used to reset target shell task.
:return: None
"""
if not self.check_serial_alive():
return None
self.serial.recvuntil('\r\n#', timeout=1)
self.serial.send('03'.decode('hex')) # Send ctrl + c to reset target shell.
self.serial.recvuntil('\r\n#', timeout=3)
def get_mem_data_from_dump(self, raw_data):
'''Memory dump output parse, used to get raw memory dump data, need overwritten for specific target.
:param raw_data: Memory dump command output.
:return: Raw memory dump data.
'''
rsp_data = {}
rsp_hex_data = ''
data_list = raw_data.split('\r\n')
self.logger.debug("data_list: %s" % data_list)
# check address offset
for data in data_list:
try:
self.logger.debug('data: %s' % data)
address = int(data[:8], 16)
self.logger.debug("address: %s" % hex(address))
hex_data = data[11:60]
hex_data = hex_data.replace(' ', '')
hex_data = hex_data.replace('-', '')
self.logger.debug("hex_data: %s" % hex_data)
if len(hex_data) != 32:
self.logger.error('hex_data length format error!')
else:
rsp_data[address] = hex_data
except Exception as err:
self.logger.debug("Can't get mem data with dump data %s! Because of:\r\n %s" % (data, err))
if len(rsp_data) > 0:
return rsp_data
else:
return None
@staticmethod
def prepare_memory_dump_command(start_address, length):
"""
:param start_address: Memory address to read.
:param length: Memory read length.
:return: memory dump command
"""
command = 'mem -dump %s %s' % (hex(start_address), hex(length))
return command
def memory_dump_data_parser(self, dump_data):
"""
:param dump_data:
:return:
"""
rsp_data_list = {}
rsp_data = dump_data.replace(self.serial_until, '')
# TODO: some case it's happen
rsp_data = rsp_data.replace(' #', '')
rsp_data.strip()
rsp_data = rsp_data.strip()
self.logger.debug('after clean up rsp_data:%s' % rsp_data)
data_list = rsp_data.split('\r\n')
self.logger.debug("data_list: %s" % data_list)
# check address offset
for data in data_list:
try:
self.logger.debug('data: %s' % data)
address = int(data[:8], 16)
self.logger.debug("address: %s" % hex(address))
hex_data = data[11:60]
hex_data = hex_data.replace(' ', '')
hex_data = hex_data.replace('-', '')
self.logger.debug("hex_data: %s" % hex_data)
if len(hex_data) != 32:
self.logger.error('hex_data length format error!')
else:
rsp_data_list[address] = hex_data
except Exception as err:
self.logger.debug("Can't get mem data with dump data %s! Because of:\r\n %s" % (data, err))
if len(rsp_data_list) > 0:
return rsp_data_list
else:
return None
def _dump_memroy(self, start_address, size):
''' Using memory read command to dump memory data dict.
:param start_address: Memory address to read.
:param size: Memory read size.
:return: Memory data dict.
'''
self.serial.recvrepeat(timeout=0.1)
self.logger.debug("Trying to get %s bytes mem data from %s" % (hex(size), hex(start_address)))
command = self.prepare_memory_dump_command(start_address, size)
rsp_data = self.send_and_recvuntil(command, timeout=3)
rsp_data = rsp_data.replace(command + '\r\n', '')
mem_data_list = self.memory_dump_data_parser(rsp_data)
if not mem_data_list:
return None
self.logger.debug("length of mem_data_list is %s, correct length is %s" % (hex(len(mem_data_list)), hex((size / 0x10))))
if len(mem_data_list) < (size / 0x10) - 0x10:
return None
return mem_data_list
def get_mem_dump(self, start_address, size, interval=0x1000):
'''Get memory data from target
:param start_address: Memory address to read.
:param size: Total memory read size.
:param interval: Memory size per read.
:return: Memory data
'''
mem_dump_data_dict = {}
mem_dump_data = ''
# Add panding header for 16 bytes align.
padding_start_length = 0
if start_address % 0x10 != 0:
self.logger.debug("Dump address %s is not 16 bytes aligned" % hex(start_address))
padding_start_length = start_address % 0x10
self.logger.debug("Add padding %s bytes to start" % hex(padding_start_length))
# Add panding for 16 bytes align.
current_length = size + padding_start_length
if current_length % 0x10 != 0:
current_length += 0x10 - (current_length % 0x10)
if current_length < interval:
interval = current_length
for address in range(start_address - padding_start_length,
start_address + current_length - padding_start_length,
interval):
mem_data_list = self._dump_memroy(address, interval)
while not mem_data_list:
mem_data_list = self._dump_memroy(address, interval)
self.logger.debug('mem_data_list: %s' % mem_data_list)
if len(mem_data_list):
# fix data
for offset in range(address, address + interval, 0x10):
if offset not in mem_data_list:
self.logger.debug("Can't Find %s in return mem data list, trying to read data again" % hex(address))
temp_data = self._dump_memroy(offset, 0x10)
while not temp_data:
temp_data = self._dump_memroy(offset, 0x10)
mem_data_list[offset] = temp_data[offset]
else:
self.logger.warn("Can't get mem_data from: %s with interval: %s" % (hex(address), hex(interval)))
mem_dump_data_dict.update(mem_data_list)
# get raw_dump
for address in range(start_address - padding_start_length, start_address + size, 0x10):
mem_dump_data += mem_dump_data_dict[address].decode('hex')
return mem_dump_data[padding_start_length:size + padding_start_length]
def write_memory_data(self, address, data, check=True):
"""
:param address: Memory address to write data.
:param data: Data to write
:param check: True, check write result, False write to memory without check.
:return:
"""
write_length = len(data)
for offset in range(0, write_length, 0x04):
current_write_address = address + offset
write_data = data[offset:offset + 4].encode("hex")
self._write_single_memory_data(current_write_address, write_data)
current_data = self.get_mem_dump(address, write_length)
# TODO: Need improve, should only write missed data.
if check:
if (data == current_data) is False:
self.write_memory_data(address, data)
def _write_single_memory_data(self, address, data):
"""Write 4 bytes of memory data.
3F04
:param address:
:param data:
:return:
"""
command = "mem -md %s %s" % (hex(address), data)
self.send_and_recvuntil(command)
def not_implemented(self, func_name):
'''
log access to unimplemented method and raise error
:param func_name: name of unimplemented function.
:raise: NotImplementedError detailing the function the is not implemented.
'''
msg = '%s is not overridden by %s' % (func_name, type(self).__name__)
self.logger.error(msg)
raise NotImplementedError(msg)