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
|
import operator
import idaapi
import idc
from miasm2.expression.expression_helper import Variables_Identifier
from miasm2.expression.expression import ExprAff
from utils import expr2colorstr, translatorForm
class ActionHandler(idaapi.action_handler_t):
def activate(self, ctx):
view_index = get_focused_view()
if view_index is None:
return 1
self.custom_action(all_views[view_index])
return 1
def update(self, ctx):
return idaapi.AST_ENABLE_ALWAYS
class ActionHandlerExpand(ActionHandler):
def custom_action(self, view):
view.expand_expr()
class ActionHandlerTranslate(ActionHandler):
def custom_action(self, view):
view.translate_expr(view.GetLineNo())
class symbolicexec_t(idaapi.simplecustviewer_t):
def add(self, key, value):
self.AddLine("%s = %s" % (expr2colorstr(self.machine.mn.regs.all_regs_ids, key),
expr2colorstr(self.machine.mn.regs.all_regs_ids, value)))
def expand(self, linenum):
element = self.line2eq[linenum]
expanded = Variables_Identifier(element[1],
var_prefix="%s_v" % element[0])
self.line2eq = self.line2eq[0:linenum] + \
expanded.vars.items() + \
[(element[0], expanded.equation)] + \
self.line2eq[linenum + 1:]
def print_lines(self):
self.ClearLines()
for element in self.line2eq:
self.add(*element)
self.Refresh()
def translate_expr(self, line_nb):
element = self.line2eq[line_nb]
expr = ExprAff(*element)
form = translatorForm(expr)
form.Compile()
form.Execute()
def Create(self, equations, machine, *args, **kwargs):
if not super(symbolicexec_t, self).Create(*args, **kwargs):
return False
self.machine = machine
self.line2eq = sorted(equations.items(), key=operator.itemgetter(0))
self.lines_expanded = set()
self.print_lines()
return True
def expand_expr(self):
self.expand(self.GetLineNo())
self.print_lines()
def OnPopupMenu(self, menu_id):
if menu_id == self.menu_expand:
self.expand(self.GetLineNo())
self.print_lines()
if menu_id == self.menu_translate:
self.translate_expr(self.GetLineNo())
return True
def OnKeydown(self, vkey, shift):
# ESCAPE
if vkey == 27:
self.Close()
return True
if vkey == ord('E'):
self.expand_expr()
if vkey == ord('T'):
self.translate_expr(self.GetLineNo())
return False
def get_focused_view():
for i, view in enumerate(all_views):
if view.IsFocused():
return i
return None
class Hooks(idaapi.UI_Hooks):
def finish_populating_tform_popup(self, form, popup):
idaapi.attach_action_to_popup(form, popup, 'my:expand', None)
idaapi.attach_action_to_popup(form, popup, 'my:translate', None)
def symbolic_exec():
from miasm2.ir.symbexec import SymbolicExecutionEngine
from miasm2.core.bin_stream_ida import bin_stream_ida
from utils import guess_machine
bs = bin_stream_ida()
machine = guess_machine()
mdis = machine.dis_engine(bs)
start, end = idc.SelStart(), idc.SelEnd()
mdis.dont_dis = [end]
blocks = mdis.dis_multiblock(start)
ira = machine.ira()
for block in blocks:
ira.add_block(block)
print "Run symbolic execution..."
sb = SymbolicExecutionEngine(ira, machine.mn.regs.regs_init)
sb.run_at(start)
modified = {}
for dst, src in sb.modified(init_state=machine.mn.regs.regs_init):
modified[dst] = src
view = symbolicexec_t()
all_views.append(view)
if not view.Create(modified, machine,
"Symbolic Execution - 0x%x to 0x%x" % (start, end)):
return
view.Show()
# Support ida 6.9 and ida 7
all_views = []
hooks = Hooks()
hooks.hook()
action_expand = idaapi.action_desc_t(
'my:expand',
'Expand',
ActionHandlerExpand(),
'E',
'Expand expression',
50)
action_translate = idaapi.action_desc_t(
'my:translate',
'Translate',
ActionHandlerTranslate(),
'T',
'Translate expression in C/python/z3...',
103)
idaapi.register_action(action_expand)
idaapi.register_action(action_translate)
if __name__ == '__main__':
idaapi.CompileLine('static key_F3() { RunPythonStatement("symbolic_exec()"); }')
idc.AddHotkey("F3", "key_F3")
print "=" * 50
print """Available commands:
symbolic_exec() - F3: Symbolic execution of current selection
"""
|