-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy pathsgxrace.py
6751 lines (5422 loc) · 225 KB
/
sgxrace.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
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
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#!/usr/bin/python3
import os
import sys
import angr
from angr import SimProcedure
from capstone import *
from capstone.x86_const import *
from capstone.x86 import *
import time
import copy
import filecmp
import argparse
import archinfo
import random
import subprocess
import gc
import datetime
class Info(object):
def __init__(self):
self.picflag = None
self.project = None
self.binaryfile = None
self.asmfile = None
self.hexdumpfile = None
self.readelffile = None
self.code = None
self.args = None
self.outputfile = None
self.outputfile1 = None
self.outputfile2 = None
self.succssorsfile = None
self.locksetfile = None
self.gv_reverse_mapfile = None
self.ots_once_caller_callee_mapfile = None
# capstone insn list
self.insns = []
# instruction address to capstone insn map
self.insnsmap = {}
# list of instruction addresses
self.insnaddrs = []
# instruction address to objdump insn string line map
self.insnlinesmap = {}
self.codeoffset = None
self.unsupportedlist = []
self.xsavelist = []
self.xsaveclist = []
self.xsaveslist = []
self.xsave64list = []
self.xsavec64list = []
self.xsaves64list = []
self.fxsavelist = []
self.fxsave64list = []
self.xrstorlist = []
self.xrstorslist = []
self.xrstor64list = []
self.xrstors64list = []
self.fxrstorlist = []
self.fxrstor64list = []
self.repstoslist = []
self.repmovsqlist = []
self.rdrandlist = []
self.wrfsbaselist = []
self.enclulist = []
self.enclaveentry = None
self.abortfunction = None
self.state = None
self.emptystate = None
self.states = []
self.targets1 = []
self.targets2 = []
self.succs = []
self.encluflag = 0
self.g = []
self.interestedregs = ["rax","rbx","rcx","rdx","rdi","rsi","r8","r9","r10","r11","r12","r13","r14","r15"]
self.controllableregs = ["rbx","rdx","rdi","rsi","r8","r9","r10","r11","r12","r13","r14","r15"]
self.firstocallmet = 0
self.tstart = 0
self.tend = 0
self.strlenflist = []
self.memcpyflist = []
# list of [func_addr, func_name, func_end_insn_addr]
self.func_list = []
# func_name to [func_addr, func_end_insn_addr]
self.func_name_map = {}
# func_addr to [func_name, func_end_insn_addr]
self.func_addr_map = {}
# [insn_addr, gv_addr, access_type]
# access type: 1 for read, 2 for write, 3 for w/r
self.gv_list = []
# access insn address to [[gv_addr, access_type]]
self.gv_map = {}
# gv_addr to [[insn_addr, access_type]]
self.gv_reverse_map = {}
# list of [call_insn_addr, call_target_addr]
# -1 for unsolved target address
self.callinsn = []
# call_insn_addr to call_target_addr map
# -1 for unsolved target address
self.callinsnmap = {}
# list of [jmp_insn_addr, jmp_target_addr, type]
# -1 for unsolved target address
# type: 0 for direct, 1 for indirect
self.jmpinsn = []
# jmp_insn_addr to [jmp_target_addr, type] map
# type: 0 for direct, 1 for indirect
self.jmpinsnmap = {}
# back edge jmp_insn_addr to jmp_target_addr map
self.backedgemap = {}
# list of control instruction addresses
self.controlinsn = []
# func_addr to [[callsite_addr, callee_addr]]
self.callgraph = {}
# callee_addr to [[caller_addr, callsite_addr]]
self.callgraph_reverse = {}
self.hasmutex = 0
self.hasspin = 0
self.locksiteaddr = []
# lock site addr to [lock_var_addr, type, transfer_type]
# lock_var_addr: -1 for unsolved
# type: 0 for sgx_thread_mutex_lock, 1 for sgx_thread_mutex_unlock, 2 for sgx_spin_lock, 3 for sgx_spin_unlock
# transfer_type: 0 for call, 1 for jmp
self.locksite = {}
# insn_addr to [sucessors]
# for all instructions from objdump
self.insn_suc_map = {}
# insn_addr to a set of lock_variable_addr
self.lockset = {}
# func_addr to the number of sgx_thread_mutex_lock called
self.func_mutex_lock_count_map = {}
# func_addr to the number of sgx_thread_mutex_unlock called
self.func_mutex_unlock_count_map = {}
# func_addr to the number of sgx_spin_lock called
self.func_spin_lock_count_map = {}
# func_addr to the number of sgx_spin_unlock called
self.func_spin_unlock_count_map = {}
self.whitelist = []
# insn_addr to [[suc_addr, type]]
# suc_addr: -1 if unsolved
# type: 0 for intra, 1 for call, 2 for intra-jmp, 3 for inter-jmp, 4 for ret
self.insn_successor_map = {}
# a map to a set of locks
self.callee_root_function_to_lockset_map = {}
# a map to a set of caller function addresses
self.callee_root_function_to_caller_map = {}
# a map to a set of call site addresses
self.callee_root_function_to_callsite_map = {}
self.callee_root_function_to_functions_map = {}
# a list of racing pairs, each pair has two accesses, each access has gv_addr, insn_addr and access_type, and a exploitable type
# exploitable type: 0 for benign, 1 for data violation, 2 for control flow bending, 3 for both
# [[[gv_addr, insn_addr1, access_type1], [gv_addr, insn_addr2, access_type2], exploitable_type]]
self.race_sites_list = []
# global variable address to racing pairs map
# gv_addr to [[[gv_addr, insn_addr1, access_type1], [gv_addr, insn_addr2, access_type2], exploitable_type]]
self.race_sites_map = {}
self.mutex_lock_functions = ["sgx_thread_mutex_lock", "pthread_mutex_lock", "oe_pthread_mutex_lock", "mbedtls_mutex_lock", "oe_mutex_lock"]
self.mutex_unlock_functions = ["sgx_thread_mutex_unlock", "pthread_mutex_unlock", "oe_pthread_mutex_unlock", "mbedtls_mutex_unlock", "oe_mutex_unlock"]
self.spin_lock_functions = ["sgx_spin_lock", "oe_pthread_spin_lock", "oe_spin_lock"]
self.spin_unlock_functions = ["sgx_spin_unlock", "oe_pthread_spin_unlock", "oe_spin_unlock"]
self.start1 = 0
self.start2 = 0
self.end1 = 0
self.end2 = 0
# a list of [section_name, section_type, section_address, section_offset, section_size]
self.sectionsinfo = []
# a dict from section_offset to [section_name, section_type, section_address, section_offset, section_size]
self.sectionsinfo_offset_map = {}
# a dict from section_name to [section_name, section_type, section_address, section_offset, section_size]
self.sectionsinfo_name_map = {}
# a dict from hexdump start offset of each line to its line index in the file, starting from 0
self.hexdump_start_offset_to_line_index_map = {}
self.MAX_ITERATE = 10
self.MAX_SINGLE_ITERATE = 2
self.loop_times_map = {}
self.mallocfunctionaddrs = []
# heap variable allocation inst addr to [return func] map
#self.heapvar_to_retfunc_map = {}
# return func to [heap variable allocation inst addr] map
#self.retfunc_to_heapvar_map = {}
# heap variable pointer containing global variable to [heap_var_init_insn_addr]
self.gvtohv_map = {}
# heap_var_init_insn_addr to [heap variable pointer containing global variable]
self.hvtogv_map = {}
# a set of func addr that involves heap pointer reading
self.heap_pointer_access_func_addrs = set()
# insn_addr to [[heap_pointer, access_type]]
self.heap_pointer_access_insn_map = {}
# func addr to a set of gv_addr map
self.heap_pointer_access_func_addr_to_gv_map = {}
# a set of memory cell addrs
self.track_cells = set()
self.init_track_cells_at_beginning = False
self.heap_init_funcs = set()
# a coarse grained gv addr to name str map
self.coarsegvmap = {}
# insn addr to [gv_addr, constant] map
self.constantwritemap = {}
# insn addr to (lock_addr to a set of locks map) map
self.lockhistory = {}
# list of none-code addresses in code section
self.nonecodeaddresses = []
# a caller to a set of callees map via calling off-the-shelf once functions
self.ots_once_caller_callee_map = {}
self.intel_sgx_sdk_func_names = []
self.intel_sgx_sdk_func_insn_addrs = []
# data section names
self.data_section_names = [".rodata", ".niprod", ".nipd", ".bss", ".tbss", ".data.rel.ro", ".data"]
# a list of [data section name, start_addr, end_addr]
self.data_section_info = []
# the max v_dyn_addr of all data sections, for quick check use
self.data_sections_v_dyn_addr_max = None
# the min v_dyn_addr of all data sections, for quick check use
self.data_sections_v_dyn_addr_min = None
global info
info = Info()
def load_binary():
#comm = "file " + info.args.input
#print(os.system(comm))
#print(subprocess.check_output(['file', info.args.input]).decode('utf-8'))
file_command_return_string = subprocess.check_output(['file', info.args.input]).decode('utf-8')
#if info.args.input.endswith(".so"):
if "shared object" in file_command_return_string and "dynamically linked" in file_command_return_string:
info.picflag = 1
else:
info.picflag = 0
if info.picflag == 1:
try:
info.project = angr.Project(info.args.input,load_options={'auto_load_libs': False})
except:
info.picflag = 0
info.project = angr.Project(info.args.input,
main_opts = {'backend': 'blob', 'custom_arch': 'amd64'},
load_options={'auto_load_libs': False})
elif info.picflag == 0:
info.project = angr.Project(info.args.input,
main_opts = {'backend': 'blob', 'custom_arch': 'amd64'},
load_options={'auto_load_libs': False})
#print(hex(info.picflag))
#
# the objdump generated diassembly file is named with original_file_name_asm in the same directory
# the hexdump generated file and readelf generated section info are also in the same directory
#
def disassemble():
info.binaryfile = os.path.realpath(info.args.input)
# generate objdump file
info.asmfile = info.binaryfile + "_asm"
#print(info.asmfile)
tmpfile = "/tmp/" + os.path.basename(info.asmfile)
#print(tmpfile)
comm = "objdump -d " + info.binaryfile + " > " + tmpfile
os.system(comm)
if os.path.exists(tmpfile):
if (os.path.exists(info.asmfile) and not filecmp.cmp(tmpfile, info.asmfile)) or not os.path.exists(info.asmfile):
comm = "objdump -d " + info.binaryfile + " > " + info.asmfile
os.system(comm)
# generate hexdump file
info.hexdumpfile = info.binaryfile + "_hexdump"
#print(info.hexdumpfile)
tmpfile = "/tmp/" + os.path.basename(info.hexdumpfile)
#print(tmpfile)
comm = "hexdump -C " + info.binaryfile + " > " + tmpfile
os.system(comm)
if os.path.exists(tmpfile):
if (os.path.exists(info.hexdumpfile) and not filecmp.cmp(tmpfile, info.hexdumpfile)) or not os.path.exists(info.hexdumpfile):
comm = "hexdump -C " + info.binaryfile + " > " + info.hexdumpfile
os.system(comm)
# generate readelf section info file
info.readelffile = info.binaryfile + "_readelf"
#print(info.readelffile)
tmpfile = "/tmp/" + os.path.basename(info.readelffile)
#print(tmpfile)
comm = "readelf -S " + info.binaryfile + " > " + tmpfile
os.system(comm)
if os.path.exists(tmpfile):
if (os.path.exists(info.readelffile) and not filecmp.cmp(tmpfile, info.readelffile)) or not os.path.exists(info.readelffile):
comm = "readelf -S " + info.binaryfile + " > " + info.readelffile
os.system(comm)
def readelfsectionsinfo():
f1 = open(info.readelffile,'r')
lines1 = f1.readlines()
for line1 in lines1:
if "[" in line1 and "]" in line1:
#print(line1[line1.index("[") + 1:line1.index("]")])
s = line1[line1.index("[") + 1:line1.index("]")].strip()
if s.isnumeric():
#print(str(int(s, 10)))
nextline1 = lines1[lines1.index(line1) + 1]
nextline1split = nextline1.strip().split()
#print(line1)
#print(nextline1)
restline1 = line1[line1.index("]") + 1:].strip().split()
#print(restline1)
if len(restline1) == 4:
#print(line1)
#print(restline1[0])
#print(restline1[3])
#print(nextline1split[0])
info.sectionsinfo.append([restline1[0], restline1[1], int(restline1[2], 16), int(restline1[3], 16), int(nextline1split[0], 16)])
info.sectionsinfo_offset_map[int(restline1[3], 16)] = [restline1[0], restline1[1], int(restline1[2], 16), int(restline1[3], 16), int(nextline1split[0], 16)]
info.sectionsinfo_name_map[restline1[0]] = [restline1[0], restline1[1], int(restline1[2], 16), int(restline1[3], 16), int(nextline1split[0], 16)]
f1.close()
#for sectioninfo in info.sectionsinfo:
# print("*")
# print(sectioninfo[0])
# print(sectioninfo[1])
# print(hex(sectioninfo[2]))
# print(hex(sectioninfo[3]))
# print(hex(sectioninfo[4]))
#for sectioninfo_offset in info.sectionsinfo_offset_map:
# print("*")
# print(info.sectionsinfo_offset_map[sectioninfo_offset][0])
# print(info.sectionsinfo_offset_map[sectioninfo_offset][1])
# print(hex(info.sectionsinfo_offset_map[sectioninfo_offset][2]))
# print(hex(info.sectionsinfo_offset_map[sectioninfo_offset][3]))
# print(hex(info.sectionsinfo_offset_map[sectioninfo_offset][4]))
# resolve data sections
for sectioninfo in info.sectionsinfo:
#print("*")
#print(sectioninfo[0])
##print(sectioninfo[1])
#print(hex(sectioninfo[2]))
##print(hex(sectioninfo[3]))
#print(hex(sectioninfo[4]))
start_v_dyn_addr = static_addr_to_v_dyn_addr(sectioninfo[2])
end_v_dyn_addr = static_addr_to_v_dyn_addr(sectioninfo[2] + sectioninfo[4] - 1)
#print(hex(start_v_dyn_addr))
#print(hex(end_v_dyn_addr))
if sectioninfo[0] in info.data_section_names:
info.data_section_info.append([sectioninfo[0], start_v_dyn_addr, end_v_dyn_addr])
if info.data_sections_v_dyn_addr_min == None or start_v_dyn_addr < info.data_sections_v_dyn_addr_min:
info.data_sections_v_dyn_addr_min = start_v_dyn_addr
if info.data_sections_v_dyn_addr_max == None or end_v_dyn_addr > info.data_sections_v_dyn_addr_max:
info.data_sections_v_dyn_addr_max = end_v_dyn_addr
#for data_sec_info in info.data_section_info:
# print("*")
# print(data_sec_info[0])
# print(hex(data_sec_info[1]))
# print(hex(data_sec_info[2]))
#print(hex(info.data_sections_v_dyn_addr_min))
#print(hex(info.data_sections_v_dyn_addr_max))
# check wether a variable dynamic address used by angr (for symbolic execution use) is within data sections
def v_dyn_addr_in_data_sections(addr):
if addr > info.data_sections_v_dyn_addr_max or addr < info.data_sections_v_dyn_addr_min:
return False
for data_sec_info in info.data_section_info:
sec_start = data_sec_info[1]
sec_end = data_sec_info[2]
if addr >= sec_start and addr <= sec_end:
return True
return False
def readhexdumpinfo():
#print("readhexdumpinfo")
f1 = open(info.hexdumpfile,'r')
lines1 = f1.readlines()
line1_index = 0
for line1 in lines1:
#print(line1_index)
s = line1.strip().split()
if s[0] != "*":
info.hexdump_start_offset_to_line_index_map[int(s[0], 16)] = line1_index
line1_index = line1_index + 1
f1.close()
#for start_offset in sorted(info.hexdump_start_offset_to_line_index_map):
# print("*")
# print(hex(start_offset))
# print(str(info.hexdump_start_offset_to_line_index_map[start_offset]))
# convert variable dynamic address used by angr (for symbolic execution use)
# to static variable address (address defined in the binary) by just minus
# 0x400000 (for shared object)
def v_dyn_addr_to_static_addr(v_addr):
file_command_return_string = subprocess.check_output(['file', info.args.input]).decode('utf-8')
if "shared object" in file_command_return_string and "dynamically linked" in file_command_return_string:
info.picflag = 1
else:
info.picflag = 0
if info.picflag == 1:
return v_addr - 0x400000
else:
return v_addr
def static_addr_to_v_dyn_addr(s_addr):
file_command_return_string = subprocess.check_output(['file', info.args.input]).decode('utf-8')
if "shared object" in file_command_return_string and "dynamically linked" in file_command_return_string:
info.picflag = 1
else:
info.picflag = 0
if info.picflag == 1:
return s_addr + 0x400000
else:
return s_addr
# convert variable dynamic address used by angr (for symbolic execution use)
# to offset in the binary. if the variable address is not defined in the
# binary, return -1
def v_dyn_addr_to_binary_offset(v_addr):
# convert v_addr to v_static_addr
v_static_addr = v_dyn_addr_to_static_addr(v_addr)
for sectioninfo in info.sectionsinfo:
if sectioninfo[2] != 0:
# find it.
if v_static_addr >= sectioninfo[2] and v_static_addr <= sectioninfo[2] + sectioninfo[4] - 1:
return v_static_addr - (sectioninfo[2] - sectioninfo[3])
return -1
# return None if not inside any section
def get_variable_section(v_addr):
# convert v_addr to offset in binary
offset = v_dyn_addr_to_binary_offset(v_addr)
if offset == -1:
return None
# convert v_addr to v_static_addr
v_static_addr = v_dyn_addr_to_static_addr(v_addr)
for sectioninfo in info.sectionsinfo:
if v_static_addr >= sectioninfo[2] and v_static_addr <= sectioninfo[2] + sectioninfo[4] - 1:
return sectioninfo[0]
return None
# currently supports read from within aligned 16 bytes
# call v_dyn_addr_to_binary_offset and check whether it is -1 before calling this function
# currently width parameter should not be larger than 16
# default endian is little endian, which is True
def read_variable_initial_value_in_binary(v_addr, width, little_endian = True):
#print("v_addr:")
#print(hex(v_addr))
#print("width:")
#print(hex(width))
# convert v_addr to offset in binary
v_offset = v_dyn_addr_to_binary_offset(v_addr)
v_aligned_start_offset = v_offset - v_offset % 16
v_aligned_remaining_offset = v_offset % 16
# in case someone forgets to call v_dyn_addr_to_binary_offset
if v_offset == -1:
return -1
#print("v_aligned_start_offset:")
#print(hex(v_aligned_start_offset))
if get_variable_section(v_addr) == ".bss":
return 0x0
else:
resultline1 = None
f1 = open(info.hexdumpfile,'r')
lines1 = f1.readlines()
if v_aligned_start_offset in info.hexdump_start_offset_to_line_index_map:
line1_index = info.hexdump_start_offset_to_line_index_map[v_aligned_start_offset]
resultline1 = lines1[line1_index]
else:
current_offset = v_aligned_start_offset - 0x10
while current_offset >= 0:
if current_offset in info.hexdump_start_offset_to_line_index_map:
line1_index = info.hexdump_start_offset_to_line_index_map[current_offset]
resultline1 = lines1[line1_index]
break
current_offset = current_offset - 0x10
containingbytes = resultline1.strip().split()[1:16]
#print("containingbytes:")
#print(containingbytes)
final_num_str = ""
byte_start_index = v_aligned_remaining_offset
#print("byte_start_index:")
#print(str(byte_start_index))
b_index = 0
num_str_list = []
for b in containingbytes:
#print("b_index:")
#print(str(b_index))
if b_index >= byte_start_index and b_index <= byte_start_index + width - 1:
num_str_list.append(b)
b_index = b_index + 1
#print("num_str_list:")
#print(num_str_list)
if little_endian:
num_str_list = reversed(num_str_list)
for num_str in num_str_list:
#print("num_str:")
#print(num_str)
final_num_str = final_num_str + num_str
#print("final_num_str:")
#print(final_num_str)
final_num = int(final_num_str, 16)
return final_num
def parseinsaddr(line, separator):
temp = line[:line.find(separator)]
try:
temp1 = int(temp, 16)
except:
return -1
if info.picflag == 1:
temp2 = temp1 + 0x400000
else:
temp2 = temp1
return temp2
def checkzeropadding(line, separator):
temp = line[line.find(separator)+1:]
if "\t" in temp:
temp = temp[line.find("\t")+1:]
if "\t" in temp:
return False
return True
def findinsaddr():
f1 = open(info.asmfile,'r')
lines1 = f1.readlines()
for line1 in lines1:
if ":" in line1:
addr = parseinsaddr(line1, ":")
if addr == -1:
continue
if checkzeropadding(line1, ":") == False:
info.insnaddrs.append(addr)
info.insnlinesmap[addr] = line1
f1.close()
#for ad in info.insnaddrs:
# print(hex(ad))
#for addr in sorted(info.insnlinesmap):
# print("*")
# print(hex(addr))
# print(info.insnlinesmap[addr])
def findnextinsaddr(addr):
if addr >= info.insnaddrs[-1] or addr < info.insnaddrs[0]:
return -1
try:
return info.insnaddrs[info.insnaddrs.index(addr) + 1]
except:
return -1
def findpreviousinsaddr(addr):
if addr > info.insnaddrs[-1] or addr <= info.insnaddrs[0]:
return -1
try:
return info.insnaddrs[info.insnaddrs.index(addr) - 1]
except:
return -1
def getinsaddr(line, separator):
temp = line[:line.find(separator)]
temp1 = int(temp, 16)
if info.picflag == 1:
temp2 = temp1 + 0x400000
else:
temp2 = temp1
return temp2
#
# search disassembly for unsupported instructions
#
# unsupported instructions:
# xsave
# xsavec
# xsaves
# xsave64
# xsavec64
# xsaves64
# fxsave
# fxsave64
# xrstor
# xrstors
# xrstor64
# xrstors64
# fxrstor
# fxrstor64
#
# rep stos
# rep movsq
#
# rdrand
# wrfsbase
#
def findunsupportedinstructions():
f1 = open(info.asmfile,'r')
lines1 = f1.readlines()
for line1 in lines1:
if "\txsave " in line1:
addr = getinsaddr(line1, ":")
info.xsavelist.append(addr)
info.unsupportedlist.append(addr)
if "\txsavec " in line1:
addr = getinsaddr(line1, ":")
info.xsaveclist.append(addr)
info.unsupportedlist.append(addr)
if "\txsaves " in line1:
addr = getinsaddr(line1, ":")
info.xsaveslist.append(addr)
info.unsupportedlist.append(addr)
if "\txsave64 " in line1:
addr = getinsaddr(line1, ":")
info.xsave64list.append(addr)
info.unsupportedlist.append(addr)
if "\txsavec64 " in line1:
addr = getinsaddr(line1, ":")
info.xsavec64list.append(addr)
info.unsupportedlist.append(addr)
if "\txsaves64 " in line1:
addr = getinsaddr(line1, ":")
info.xsaves64list.append(addr)
info.unsupportedlist.append(addr)
if "\tfxsave " in line1:
addr = getinsaddr(line1, ":")
info.fxsavelist.append(addr)
info.unsupportedlist.append(addr)
if "\tfxsave64 " in line1:
addr = getinsaddr(line1, ":")
info.fxsave64list.append(addr)
info.unsupportedlist.append(addr)
if "\txrstor " in line1:
addr = getinsaddr(line1, ":")
info.xrstorlist.append(addr)
info.unsupportedlist.append(addr)
if "\txrstors " in line1:
addr = getinsaddr(line1, ":")
info.xrstorslist.append(addr)
info.unsupportedlist.append(addr)
if "\txrstor64 " in line1:
addr = getinsaddr(line1, ":")
info.xrstor64list.append(addr)
info.unsupportedlist.append(addr)
if "\txrstors64 " in line1:
addr = getinsaddr(line1, ":")
info.xrstors64list.append(addr)
info.unsupportedlist.append(addr)
if "\tfxrstor " in line1:
addr = getinsaddr(line1, ":")
info.fxrstorlist.append(addr)
info.unsupportedlist.append(addr)
if "\tfxrstor64 " in line1:
addr = getinsaddr(line1, ":")
info.fxrstor64list.append(addr)
info.unsupportedlist.append(addr)
#
# TBD: rep, stos
#
if "\trep stos " in line1:
addr = getinsaddr(line1, ":")
info.repstoslist.append(addr)
info.unsupportedlist.append(addr)
if "\trep movsq " in line1:
addr = getinsaddr(line1, ":")
info.repmovsqlist.append(addr)
info.unsupportedlist.append(addr)
if "\trdrand " in line1 and not "<" in line1:
addr = getinsaddr(line1, ":")
info.rdrandlist.append(addr)
info.unsupportedlist.append(addr)
if "\twrfsbase " in line1 and not "<" in line1:
addr = getinsaddr(line1, ":")
info.wrfsbaselist.append(addr)
info.unsupportedlist.append(addr)
if "call" in line1 and "<strlen>" in line1:
addr = getinsaddr(line1, ":")
info.strlenflist.append(addr)
info.unsupportedlist.append(addr)
if "call" in line1 and "<memcpy>" in line1:
addr = getinsaddr(line1, ":")
info.memcpyflist.append(addr)
info.unsupportedlist.append(addr)
f1.close()
gc.collect()
#for usi in info.unsupportedlist:
# print(hex(usi))
def capstoneparse():
start = info.insnaddrs[0]
while True:
if start == info.insnaddrs[0]:
addr = start
else:
while start <= info.insnaddrs[-1]:
addr = findnextinsaddr(start)
if addr >= info.insnaddrs[0] and addr <= info.insnaddrs[-1]:
break
else:
start = start + 1
if start < info.insnaddrs[0] or start > info.insnaddrs[-1]:
break
#print("capstone disassembly starts: " + hex(addr))
with open(info.args.input, 'rb') as f:
if info.picflag == 1:
seekstart = addr - 0x400000
else:
seekstart = addr
#print("*")
#print(hex(addr))
#seekstart = 0xd940
#print(hex(seekstart))
# if text section address and offset are not the same
for sectioninfo in info.sectionsinfo:
if sectioninfo[0] == ".text" and sectioninfo[2] != sectioninfo[3]:
seekstart = seekstart - (sectioninfo[2] - sectioninfo[3])
f.seek(seekstart, 1)
info.code = f.read()
insns = info.project.arch.capstone.disasm(info.code, addr)
#md = Cs(CS_ARCH_X86, CS_MODE_64)
#for i in md.disasm(info.code, 0xe940):
# print(i.mnemonic)
insnlist = list(insns)
# disassemble as many instructions as objdump
templist = list(insnlist)
for csinsn in templist:
if csinsn.address > info.insnaddrs[-1]:
insnlist.remove(csinsn)
info.insns.extend(insnlist)
for ins in insnlist:
info.insnsmap[ins.address] = ins
#print(hex(ins.address))
#print(ins.mnemonic)
gc.collect()
f.close()
if insnlist:
start = insnlist[-1].address
else:
start = addr
#print("start: " + hex(start))
gc.collect()
gc.collect()
#for csinsn in info.insns:
# print("*")
# print(hex(csinsn.address))
# print(csinsn.mnemonic)
# print(csinsn.op_str)
# print(csinsn.size)
def findenclu():
f1 = open(info.asmfile,'r')
lines1 = f1.readlines()
for line1 in lines1:
if "enclu" in line1:
addr = getinsaddr(line1, ":")
info.enclulist.append(addr)
#print(hex(addr))
f1.close()
def findenclaveentry():
f1 = open(info.asmfile,'r')
lines1 = f1.readlines()
for line1 in lines1:
if "<enclave_entry>:" in line1 or "<oe_enter>:" in line1 or "<sgx_entry>:" in line1:
info.enclaveentry = getinsaddr(line1, "<")
break
f1.close()
#print(hex(info.enclaveentry))
def findabortfunction():
f1 = open(info.asmfile,'r')
lines1 = f1.readlines()
for line1 in lines1:
if "<abort>:" in line1 or "<__rust_abort>:" in line1:
info.abortfunction = getinsaddr(line1, "<")
break
f1.close()
#print(hex(info.abortfunction))
def findaddresses():
findenclu()
findenclaveentry()
findabortfunction()
def passf(state):
pass
def strnlenf(state):
state.rip = 0x1563b
def handleaddresses():
for addr in info.xsavelist:
info.project.hook(addr, passf, length=3)
for addr in info.xsaveclist:
info.project.hook(addr, passf, length=3)
for addr in info.xsaveslist:
info.project.hook(addr, passf, length=3)
for addr in info.xsave64list:
info.project.hook(addr, passf, length=4)
for addr in info.xsavec64list:
info.project.hook(addr, passf, length=4)
for addr in info.xsaves64list:
info.project.hook(addr, passf, length=4)
if info.picflag == 1:
for addr in info.fxsavelist:
info.project.hook(addr, passf, length=3)
else:
for addr in info.fxsavelist:
info.project.hook(addr, passf, length=4)
for addr in info.fxsave64list:
info.project.hook(addr, passf, length=4)
for addr in info.xrstorlist:
info.project.hook(addr, passf, length=4)
for addr in info.xrstorslist:
info.project.hook(addr, passf, length=4)
for addr in info.xrstor64list:
info.project.hook(addr, passf, length=4)
for addr in info.xrstors64list:
info.project.hook(addr, passf, length=4)
for addr in info.fxrstorlist:
info.project.hook(addr, passf, length=4)
for addr in info.fxrstor64list:
info.project.hook(addr, passf, length=4)
for addr in info.repstoslist:
info.project.hook(addr, passf, length=2)
for addr in info.repmovsqlist:
info.project.hook(addr, passf, length=3)
# TBD: rdrand
for addr in info.rdrandlist:
info.project.hook(addr, passf, length=3)
for addr in info.wrfsbaselist:
info.project.hook(addr, passf, length=5)
'''
# sgx_ocalloc
info.project.hook_symbol("sgx_ocalloc", Ocalloc())
info.project.hook_symbol("memcopy", Memcopy())
info.project.hook_symbol("memmove", Memmove())
'''
'''
info.project.hook(0x101af, passf, length = 2)
info.project.hook(0x7108, passf, length = 5)
info.project.hook(0x7114, passf, length = 5)
info.project.hook(0x11077, passf, length = 5)
info.project.hook(0x11060, passf, length = 5)
info.project.hook(0x110a1, passf, length = 5)
info.project.hook(0x110c0, passf, length = 5)
info.project.hook(0x1103e, passf, length = 5)
info.project.hook(0x15570, strnlenf, length = 1)
info.project.hook(0x11031, passf, length = 5)
info.project.hook(0x1155e, passf, length = 5)
'''
for addr in info.strlenflist: