forked from travisgoodspeed/md380tools
-
Notifications
You must be signed in to change notification settings - Fork 0
/
md380-fw
executable file
·203 lines (181 loc) · 9.27 KB
/
md380-fw
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
#!/usr/bin/env python2
# -*- coding: utf-8 -*-
import sys
import struct
import binascii
import argparse
class MD380FW(object):
# The stream cipher of MD-380 OEM firmware updates boils down
# to a cyclic, static XOR key block, and here it is:
key = (
'\x2e\xdf\x40\xb5\xbd\xda\x91\x35\x21\x42\xe3\xe2\x6d\xa9\x0b\x90'
'\x31\x30\x3a\xfa\x4f\x05\x74\x64\x0a\x29\x44\x7e\x60\x77\xad\x8c'
'\x9a\xe2\x63\xc4\x21\xfe\x3c\xf7\x93\xc2\xe1\x74\x16\x8c\xc9\x2a'
'\xed\x65\x68\x0c\x49\x86\xa3\xba\x61\x1c\x88\x5d\xc4\x49\x3c\xd2'
'\xee\x6b\x34\x0c\x1a\xa0\xa8\xb3\x58\x8a\x45\x11\xdf\x4f\x23\x2f'
'\xa4\xe4\xf6\x3b\x2c\x8c\x88\x2d\x9e\x9b\x67\xab\x1c\x80\xda\x29'
'\x53\x02\x1a\x54\x51\xca\xbf\xb1\x97\x22\x79\x81\x70\xfc\x00\xe9'
'\x81\x36\x4e\x4f\xa0\x1c\x0b\x07\xea\x2f\x49\x2f\x0f\x25\x71\xd7'
'\xf1\x30\x7d\x66\x6e\x83\x68\x38\x79\x13\xe3\x8c\x70\x9a\x4a\x9e'
'\xa9\xe2\xd6\x10\x4f\x40\x14\x8e\x6c\x5e\x96\xb2\x46\x3e\xe8\x25'
'\xef\x7c\xc5\x08\x18\xd4\x8b\x92\x26\xe3\xed\xfa\x88\x32\xe8\x97'
'\x47\x70\xf8\x46\xde\xff\x8b\x0c\x4d\xb3\xb6\xfc\x69\xd6\x27\x5b'
'\x76\x6f\x5b\x03\xf7\xc3\x11\x05\xc5\x1d\xfe\x92\x5f\xcb\xc2\x1c'
'\x81\x69\x1b\xb8\xf8\x62\x58\xc7\xb4\xb3\x11\xd5\x1f\xf2\x16\xc1'
'\xad\x8f\xa5\x1e\xb4\x5b\xe0\xda\x7f\x46\x7d\x1d\x9e\x6d\xc0\x74'
'\x7f\x54\xa6\x2f\x43\x6f\x64\x08\xca\xe8\x0f\x05\x10\x9c\x9d\x9f'
'\xbd\x67\x0c\x23\xf7\xa1\xe1\x59\x7b\xe8\xd4\x64\xec\x20\xca\xe9'
'\x6a\xb9\x03\x73\x67\x30\x95\x16\xb6\xd9\x19\x53\xe5\xdb\xa4\x3c'
'\xcd\x7c\xf9\xd8\x67\x9f\xfc\xc9\xe2\x8a\x6a\x2c\xf2\xed\xc8\xc1'
'\x6a\x20\x99\x4c\x0d\xad\xd4\x3b\xa1\x0e\x95\x88\x46\xb8\x13\xe1'
'\x06\x58\xd2\x07\xad\x5c\x1a\x74\xdb\xb5\xa7\x40\x57\xdb\xa2\x45'
'\xa6\x12\xd0\x82\xdd\xed\x0a\xbd\xb3\x10\xed\x6c\xda\x39\xd2\xd6'
'\x90\x82\x00\x76\x71\xe0\x21\xa0\x8f\xf0\xf3\x67\xc4\xf3\x40\xbd'
'\x47\x16\x10\xdc\x7e\xf8\x1d\xe5\x13\x66\x87\xc7\x4a\x69\xc9\x63'
'\x92\x82\xec\xee\x5a\x34\xfb\x96\x25\xc3\xb6\x68\xe1\x3c\x8a\x71'
'\x74\xb5\xc1\x23\x99\xd6\xf7\xfb\xea\x98\xcd\x61\x3d\x4d\xe1\xd0'
'\x34\xe1\xfd\x36\x10\x5f\x8e\x9e\xc6\xb6\x58\x0c\x55\xbe\x69\xa8'
'\x56\x76\x4b\x1f\xd5\x90\x7e\x47\x5f\x2f\x25\x02\x5c\xef\x00\x64'
'\xa0\x26\x9a\x18\x3c\x69\xc4\xff\x9a\x52\x41\x1b\xc9\x81\xc3\xac'
'\x15\xe1\x17\x98\xdb\x2c\x9c\x10\x9b\xb2\xf9\x71\x4f\x56\x0f\x68'
'\xfb\xd9\x2d\x5a\x86\x5b\x83\x03\xc8\x1e\xda\x5d\xe4\x8e\x82\xc3'
'\xd8\x7e\x8b\x56\x52\xb5\x38\xa0\xc6\xa9\xb0\x77\xbd\x8a\xf7\x24'
'\x70\x82\x1d\xc5\x95\x3c\xb5\xf0\x79\xa3\x89\x99\x4f\xec\x8c\x36'
'\xc7\xd6\x10\x20\xe3\x30\x39\x3d\x07\x9c\xb2\xdc\x4f\x94\x9e\xe0'
'\x24\xaa\xd2\x21\x12\x14\x41\x0f\xd4\x67\xb7\x99\xb1\xa3\xcb\x4d'
'\x0c\x70\x0f\xc0\x36\xa7\x89\x30\x86\x14\x67\x68\xac\x7b\xee\xe4'
'\x42\xd8\xb4\x36\xa4\xeb\x0f\xa8\x02\xf4\xcd\x23\xb3\xbc\x25\x4f'
'\xcc\xd4\xee\xfc\xf2\x21\x0f\xc1\x6c\x99\x37\xe2\x7c\x47\xce\x77'
'\xf0\x95\x2b\xcb\xf4\xca\x07\x03\x2a\xd2\x31\x00\xfd\x3e\x84\x86'
'\x32\x8b\x17\x9d\xbf\xa7\xb3\x37\xe1\xb1\x8a\x14\x69\x00\x25\xe3'
'\x56\x68\x9f\xaa\xa9\xb8\x11\x67\x75\x87\x4d\xf8\x36\x31\xcf\x38'
'\x63\x1c\xf0\x6b\x47\x40\x5d\xdc\x0c\xe6\xc8\xc4\x19\xaf\xdd\x6e'
'\x9e\xd9\x78\x99\x6c\xbe\x15\x1e\x0b\x9d\x88\xd2\x06\x9d\xee\xae'
'\x8a\x0f\xe3\x2d\x2f\xf4\xf5\xf6\x16\xbf\x59\xbb\x34\x5c\xdd\x61'
'\xed\x70\x1e\x61\xe5\xe3\xfb\x6e\x13\x9c\x49\x58\x17\x8b\xc8\x30'
'\xcd\xed\x56\xad\x22\xcb\x63\xce\x26\xc4\xa5\xc1\x63\x0d\x0d\x04'
'\x6e\xb6\xf9\xca\xbb\x2f\xab\xa0\xb5\x0a\xfa\x50\x0e\x02\x47\x05'
'\x54\x3d\xb3\xb1\xc6\xce\x8f\xac\x65\x7e\x15\x9e\x4e\xcc\x55\x9e'
'\x46\x32\x71\x9b\x97\xaa\x0d\xfb\x1b\x71\x02\x83\x96\x0b\x52\x77'
'\x48\x87\x61\x02\xc3\x04\x62\xd7\xfb\x74\x0f\x19\x9c\xa0\x9d\x79'
'\xa0\x6d\xef\x9e\x20\x5d\x0a\xc9\x6a\x58\xc9\xb9\x55\xad\xd1\xcc'
'\xd1\x54\xc8\x68\xc2\x76\xc2\x99\x0f\x2e\xfc\xfb\xf5\x92\xcd\xdb'
'\xa2\xed\xd9\x99\xff\x4f\x88\x50\xcd\x48\xb7\xb9\xf3\xf0\xad\x4d'
'\x16\x2a\x50\xaa\x6b\x2a\x98\x38\xc9\x35\x45\x0c\x03\xa8\xcd\x0d'
'\x74\x3c\x99\x55\xdb\x88\x70\xda\x6a\xc8\x34\x4d\x19\xdc\xcc\x42'
'\x40\x94\x61\x92\x65\x2a\xcd\xfd\x52\x10\x50\x14\x6b\xec\x85\x57'
'\x3f\xe2\x95\x9a\x5d\x11\xab\xad\x69\x60\xa8\x3b\x6f\x7a\x17\xf3'
'\x76\x17\x63\xe6\x59\x7e\x47\x30\xd2\x47\x87\xdb\xd8\x66\xde\x00'
'\x2b\x65\x37\x2f\x2d\xf1\x20\x11\xf3\x98\x7b\x4c\x9c\xd1\x76\xa7'
'\xe1\x3d\xbe\x6f\xee\x2c\xf0\x19\x70\x63\x51\x28\xf0\x1d\xbe\x52'
'\x5f\x4f\xe6\xde\xf2\x30\xb6\x50\x30\xf9\x15\x48\x49\xe9\xd2\xa8'
'\xa9\x8d\xda\xf5\xcd\x3e\xaf\x00\x55\xeb\x15\xc5\x5b\x19\x0f\x93'
'\x04\x27\x09\x6d\x54\xd7\x57\xb1\x47\x0a\xde\xf7\x1d\xcb\x11\x3c'
'\xf5\x8f\x20\x40\x9d\xbb\x6b\x2c\xa9\x67\x3d\x78\xc2\x62\xb7\x0c')
def __init__(self, base_address=0x800c000):
self.magic = b'OutSecurityBin'
self.jst = b'JST51'
self.foo = '\x30\x02\x00\x30\x00\x40\x00\x47'
self.bar = ('\x01\x0d\x02\x03\x04\x05\x06\x07'
'\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f'
'\x10\x11\x12\x13\x14\x15\x16\x17'
'\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f'
'\x20')
self.start = base_address
self.app = None
self.footer = 'OutputBinDataEnd'
self.header_fmt = '<16s7s9s16s33s47sLL120s'
self.footer_fmt = '<240s16s'
def pad(self, align=512, byte=b'\xff'):
pad_length = (align - len(self.app) % align) % align
self.app += byte * pad_length
def wrap(self):
bin = b''
header = struct.Struct(self.header_fmt)
footer = struct.Struct(self.footer_fmt)
self.pad()
app = self.crypt(self.app)
bin += header.pack(
self.magic, self.jst, b'\xff' * 9, self.foo,
self.bar, b'\xff' * 47, self.start, len(app),
b'\xff' * 120)
bin += self.crypt(self.app)
bin += footer.pack(b'\xff'*240, self.footer)
return bin
def unwrap(self, img):
header = struct.Struct(self.header_fmt)
header = header.unpack(img[:256])
self.start = header[6]
app_len = header[7]
self.app = self.crypt(img[256:256+app_len])
assert header[0].startswith(self.magic)
assert header[1].startswith(self.jst)
assert header[3].startswith(self.foo)
assert header[4] == self.bar
assert 0x8000000 <= header[6] < 0x8200000
assert header[7] == len(img) - 512
def crypt(self, data):
return self.xor(data, self.key)
@staticmethod
def xor(a, b):
# FIXME: optimized version
out = b''
l = max(len(a), len(b))
for i in xrange(l):
out += chr(ord(a[i % len(a)]) ^ ord(b[i % len(b)]))
return out
def main():
def hex_int(x):
return int(x, 0)
parser = argparse.ArgumentParser(description='Wrap and unwrap MD-380 firmware')
parser.add_argument('--wrap', '-w', dest='wrap', action='store_true',
default=False,
help='wrap app into firmware image')
parser.add_argument('--unwrap', '-u', dest='unwrap', action='store_true',
default=False,
help='unwrap app from firmware image')
parser.add_argument('--addr', '-a', dest='addr', type=hex_int,
default=0x800c000,
help='base address in flash')
parser.add_argument('--offset', '-o', dest='offset', type=hex_int,
default=0,
help='offset to skip in app binary')
parser.add_argument('input', nargs=1, help='input file')
parser.add_argument('output', nargs=1, help='output file')
args = parser.parse_args()
if not (args.wrap ^ args.unwrap):
sys.stderr.write('ERROR: --wrap or --unwrap?')
sys.exit(5)
print('DEBUG: reading "%s"' % args.input[0])
with open(args.input[0], 'rb') as f:
input = f.read()
if args.wrap:
if args.offset > 0:
print('INFO: skipping 0x%x bytes in input file' % args.offset)
md = MD380FW(args.addr)
md.app = input[args.offset:]
if len(md.app) == 0:
sys.stderr.write('ERROR: seeking beyond end of input file\n')
sys.exit(5)
output = md.wrap()
print('INFO: base address 0x{0:x}'.format(md.start))
print('INFO: length 0x{0:x}'.format(len(md.app)))
elif args.unwrap:
md = MD380FW()
try:
md.unwrap(input)
except AssertionError:
sys.stderr.write('WARNING: Funky header:\n')
for i in xrange(0, 256, 16):
hl = binascii.hexlify(input[i:i+16])
hl = ' '.join(hl[i:i+2] for i in xrange(0, 32, 2))
sys.stderr.write(hl+'\n')
sys.stderr.write('Trying anyway.\n')
output = md.app
print('INFO: base address 0x{0:x}'.format(md.start))
print('INFO: length 0x{0:x}'.format(len(md.app)))
print('DEBUG: writing "%s"' % args.output[0])
with open(args.output[0], 'wb') as f:
f.write(output)
if __name__ == "__main__":
main()