Function at 0x437b90
Capabilities:
Validate payment card number using luhn algorithm

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x14
mov eax, dword [ebp + 0x10]
push ebx
mov ebx, dword [ebp + 8]
push esi
mov ecx, dword [eax]
mov eax, dword [ebx + 0xd4]
mov esi, eax
push edi
push ecx
lea edi, [ebx + 0x88]
mov dword [ebp - 0x10], ecx
push 0xa
push eax
mov dword [ebp - 0x14], eax
mov dword [ebp + 8], eax
mov dword [ebp - 8], ecx
mov dword [ebp - 0xc], ecx
call fcn.004b8dc0
mov ecx, eax
add esp, 0xc
test ecx, ecx
je 0x4383be
mov eax, dword [ebp - 8]
sub esi, ecx
mov edx, dword [ebp + 0x10]
dec eax
add eax, esi
lea esi, [ebx + 0x8b0]
mov dword [edx], eax
lea eax, [ecx + 1]
mov ecx, dword [ebp + 8]
mov dword [edi + 0x4c], eax
sub eax, ecx
push eax
push ecx
push esi
call fcn.00425c20
add esp, 0xc
test eax, eax
jne 0x437c5f
cmp dword [edi + 0x48], eax
jne 0x437c66
push esi
call fcn.00425c90
add esp, 4
push eax
push esi
call fcn.00425ca0
mov esi, dword [ebp + 0xc]
add esp, 4
push eax
push esi
push ebx
call fcn.00438e10
add esp, 0x10
cmp eax, 2
jne 0x437c69
push eax
push esi
call fcn.0042f650
add esp, 8
cmp byte [ebx + 0x6ec], 0
je 0x43842f
mov eax, dword [ebp + 0x10]
mov byte [edi + 0xba], 0
cmp dword [eax], 0
je 0x438449
mov dword [edi + 0x44], 1
xor eax, eax
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
mov esi, dword [ebp + 0xc]
lea eax, [ebx + 0x8b0]
push eax
call fcn.00425ca0
mov edx, eax
add esp, 4
mov dword [ebp - 8], edx
mov cl, byte [edx]
cmp cl, 0xa
je 0x438038
cmp cl, 0xd
je 0x438038
mov ecx, dword [edi + 0x48]
mov dword [ebp + 8], 4
lea eax, [ecx + 1]
mov dword [edi + 0x48], eax
test ecx, ecx
jne 0x437fa1
mov eax, dword [esi + 0x1e8]
mov eax, dword [eax + 0x44]
test al, 3
je 0x437eb1
mov al, byte [edx]
mov esi, edx
test al, al
je 0x437cd2
cmp al, 0x20
je 0x437cca
cmp al, 9
jne 0x437cd2
mov al, byte [esi + 1]
inc esi
test al, al
jne 0x437cc2
push 5
push str.HTTP_
push esi
call fcn.004ca4d0
add esp, 0xc
test eax, eax
jne 0x437d7f
movsx ecx, byte [esi + 5]
mov eax, ecx
sub eax, 0x31
je 0x437dc1
sub eax, 1
je 0x437d07
sub eax, 1
jne 0x438464
mov al, byte [esi + 6]
cmp al, 0x20
je 0x437d12
cmp al, 9
jne 0x437d7f
lea edx, [ecx - 0x30]
mov cl, byte [esi + 7]
mov al, cl
lea edx, [edx + edx*4]
add edx, edx
sub al, 0x30
mov dword [ebp - 0xc], edx
cmp al, 9
ja 0x437d7f
mov al, byte [esi + 8]
mov byte [ebp + 0xb], al
sub al, 0x30
cmp al, 9
ja 0x437d7f
mov al, byte [esi + 9]
mov byte [ebp - 1], al
sub al, 0x30
cmp al, 9
ja 0x437d7f
movsx eax, cl
lea ecx, [eax + eax*4]
movsx eax, byte [ebp + 0xb]
lea eax, [eax + ecx*2]
lea ecx, [eax + eax*4]
movsx eax, byte [ebp - 1]
lea ecx, [ecx - 0xa68]
lea ecx, [eax + ecx*2]
mov dword [edi + 0x58], ecx
mov al, byte [esi + 0xa]
cmp al, 0x20
je 0x437e58
cmp al, 9
je 0x437e58
cmp al, 0xa
jl 0x437d7f
cmp al, 0xd
jle 0x437e58
lea esi, [ebx + 0x8b0]
push esi
call fcn.00425c90
add esp, 4
push eax
push esi
call fcn.00425ca0
add esp, 4
push eax
push ebx
call fcn.00438d50
add esp, 0xc
cmp eax, 1
jne 0x4384f5
mov esi, dword [ebp + 0xc]
mov dword [edi + 0x58], 0xc8
mov byte [esi + 0x335], 0xa
jmp 0x437f88
cmp byte [esi + 6], 0x2e
jne 0x4384cf
mov al, byte [esi + 7]
cmp al, 0x30
je 0x437dda
cmp al, 0x31
jne 0x4384cf
mov cl, byte [esi + 8]
cmp cl, 0x20
je 0x437deb
cmp cl, 9
jne 0x4384cf
mov cl, byte [esi + 9]
movsx edx, al
mov al, cl
sub edx, 0x26
sub al, 0x30
mov dword [ebp - 0xc], edx
cmp al, 9
ja 0x4384cf
mov al, byte [esi + 0xa]
mov byte [ebp + 0xb], al
sub al, 0x30
cmp al, 9
ja 0x4384cf
mov al, byte [esi + 0xb]
mov byte [ebp - 1], al
sub al, 0x30
cmp al, 9
ja 0x4384cf
movsx eax, cl
lea ecx, [eax + eax*4]
movsx eax, byte [ebp + 0xb]
lea eax, [eax + ecx*2]
lea ecx, [eax + eax*4]
movsx eax, byte [ebp - 1]
lea ecx, [ecx - 0xa68]
lea ecx, [eax + ecx*2]
mov dword [edi + 0x58], ecx
mov al, byte [esi + 0xc]
cmp al, 0x20
je 0x437e58
cmp al, 9
je 0x437e58
sub al, 0xa
cmp al, 3
ja 0x4384cf
cmp ecx, 0x64
jl 0x4384b5
mov eax, edx
sub eax, 0xa
je 0x437e71
sub eax, 1
jne 0x43847e
mov esi, dword [ebp + 0xc]
mov byte [esi + 0x335], dl
cmp dword [edi + 0x74], 3
jne 0x437e93
cmp dl, 0x14
je 0x437e93
push str.Lying_server__not_serving_HTTP_2
push ebx
call fcn.0042e750
add esp, 8
cmp byte [esi + 0x335], 0x14
jae 0x437f88
mov eax, dword [esi + 0x308]
mov dword [eax], 0xffffffff
jmp 0x437f88
test eax, 0x40000
je 0x4384f5
mov al, byte [edx]
mov esi, edx
test al, al
je 0x437ed4
cmp al, 0x20
je 0x437ecc
cmp al, 9
jne 0x437ed4
mov al, byte [esi + 1]
inc esi
test al, al
jne 0x437ec4
push 5
push str.RTSP_
push esi
call fcn.004ca4d0
add esp, 0xc
test eax, eax
jne 0x4384f5
mov al, byte [esi + 5]
sub al, 0x30
cmp al, 9
ja 0x4384e9
cmp byte [esi + 6], 0x2e
jne 0x4384e9
mov al, byte [esi + 7]
sub al, 0x30
cmp al, 9
ja 0x4384e9
mov al, byte [esi + 8]
cmp al, 0x20
je 0x437f1f
cmp al, 9
jne 0x4384e9
mov cl, byte [esi + 9]
mov al, cl
sub al, 0x30
cmp al, 9
ja 0x4384e9
mov dh, byte [esi + 0xa]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x4384e9
mov dl, byte [esi + 0xb]
mov al, dl
sub al, 0x30
cmp al, 9
ja 0x4384e9
movsx eax, cl
lea ecx, [eax + eax*4]
movsx eax, dh
lea eax, [eax + ecx*2]
lea ecx, [eax + eax*4]
movsx eax, dl
lea eax, [eax + ecx*2]
add eax, 0xffffeb30
mov dword [edi + 0x58], eax
mov al, byte [esi + 0xc]
cmp al, 0x20
je 0x437f7e
cmp al, 9
je 0x437f7e
sub al, 0xa
cmp al, 3
ja 0x4384e9
mov esi, dword [ebp + 0xc]
mov byte [esi + 0x335], 0xb
push esi
push ebx
call fcn.004389b0
add esp, 8
test eax, eax
jne 0x437c5f
mov dword [ebp + 8], 0xc
push ebx
call fcn.004396d0
add esp, 4
test eax, eax
jne 0x437c5f
push dword [ebp - 8]
push esi
push ebx
call fcn.00436be0
add esp, 0xc
test eax, eax
jne 0x437c5f
mov eax, dword [edi + 0x58]
sub eax, 0x64
cmp eax, 0x64
jae 0x437fd6
or dword [ebp + 8], 0x20
lea eax, [ebx + 0x8b0]
push eax
call fcn.00425c90
mov esi, dword [ebp - 8]
push eax
push esi
push 1
push ebx
call fcn.0042e5f0
lea eax, [ebx + 0x8b0]
push eax
call fcn.00425c90
push eax
push esi
push dword [ebp + 8]
push ebx
call fcn.0042ea60
add esp, 0x28
test eax, eax
jne 0x437c5f
push eax
lea eax, [ebx + 0x8b0]
push eax
call fcn.00425c90
add esp, 4
push eax
push ebx
call fcn.004356c0
add esp, 0xc
test eax, eax
jne 0x437c5f
jmp 0x43837d
mov ecx, dword [edi + 0x58]
lea eax, [ecx - 0x64]
cmp eax, 0x63
ja 0x4380a6
sub ecx, 0x64
je 0x438076
sub ecx, 1
je 0x438060
mov byte [edi + 0xba], 1
mov dword [edi + 0x48], 0
jmp 0x438111
cmp dword [edi + 0x74], 2
je 0x438505
mov byte [edi + 0xba], 0
jmp 0x438111
cmp dword [edi + 0x70], 0
mov byte [edi + 0xba], 1
mov dword [edi + 0x48], 0
jle 0x438111
or dword [edi + 0x5c], 2
push 0
push ebx
mov dword [edi + 0x70], 0
call fcn.0041fec0
add esp, 8
jmp 0x438111
cmp dword [edi + 0x74], 2
jne 0x4380b7
push dword [ebx + 0x7c]
call fcn.0041ffa0
add esp, 4
mov eax, dword [edi]
and eax, dword [edi + 4]
mov byte [edi + 0xba], 0
cmp eax, 0xffffffff
jne 0x438111
cmp byte [edi + 0xbf], 0
jne 0x438111
cmp byte [esi + 0x1ce], 0
jne 0x438111
cmp byte [esi + 0x335], 0xb
jne 0x438111
mov eax, dword [esi + 0x1e8]
test dword [eax + 0x44], 0x40000
jne 0x438111
cmp byte [ebx + 0xd86], 5
je 0x438111
push str.no_chunk__no_close__no_size._Assume_close_to_signal_end
push ebx
call fcn.0042e750
push 2
push esi
call fcn.0042f650
add esp, 0x10
cmp byte [edi + 0xba], 0
jne 0x43812b
push ebx
call fcn.004388e0
add esp, 4
test eax, eax
jne 0x437c5f
cmp byte [esi + 0x1ce], 0
je 0x438171
mov eax, dword [ebx + 0xe0]
cmp eax, 0x191
jne 0x43814c
cmp dword [esi + 0x220], 2
je 0x43815c
jmp 0x438171
cmp eax, 0x197
jne 0x438171
cmp dword [esi + 0x224], 2
jne 0x438171
push str.Connection_closure_while_negotiating_auth__HTTP_1.0__
push ebx
call fcn.0042e750
add esp, 8
mov byte [ebx + 0xd8d], 1
mov eax, dword [edi + 0x58]
sub eax, 0x64
cmp eax, 0x64
lea eax, [ebx + 0x8b0]
push eax
sbb esi, esi
and esi, 0x20
add esi, 4
call fcn.00425c90
add esp, 4
mov dword [ebp - 0xc], eax
push eax
lea eax, [ebx + 0x8b0]
push eax
call fcn.00425ca0
add esp, 4
push eax
push esi
push ebx
call fcn.0042ea60
add esp, 0x10
test eax, eax
jne 0x437c5f
push eax
push dword [ebp - 0xc]
push ebx
call fcn.004356c0
add esp, 0xc
test eax, eax
jne 0x437c5f
mov esi, dword [edi + 0x58]
push ebx
call fcn.00439280
add esp, 4
test al, al
jne 0x43859c
lea eax, [esi - 0x64]
cmp eax, 0x63
ja 0x4381f0
mov eax, dword [ebx + 0xc0]
jmp 0x4381f2
xor eax, eax
push ebx
mov dword [ebx + 0xc8], eax
call fcn.00435bd0
add esp, 4
test eax, eax
jne 0x437c5f
cmp dword [edi + 0x58], 0x12c
mov esi, dword [ebp + 0xc]
jl 0x438370
cmp byte [esi + 0x1d8], al
jne case.default.0x43824e
cmp byte [esi + 0x1ce], al
jne case.default.0x43824e
cmp byte [ebx + 0xd9b], al
jne 0x438355
movzx eax, byte [ebx + 0xd86]
dec eax
cmp eax, 3
ja case.default.0x43824e
jmp dword [eax*4 + 0x4385b8]
push 0
push ebx
call fcn.0041fec0
add esp, 8
cmp byte [edi + 0xbc], 0
jne case.default.0x43824e
cmp dword [edi + 0x58], 0x1a1
jne 0x4382e7
cmp byte [ebx + 0xd8f], 0
je 0x4382e7
mov eax, dword [edi + 0x18]
or eax, dword [edi + 0x1c]
jne 0x43829d
cmp dword [edi + 0x70], 1
jne 0x43829d
push str.Got_HTTP_failure_417_while_waiting_for_a_100
push ebx
call fcn.0042e750
add esp, 8
jmp 0x4382c2
push str.Got_HTTP_failure_417_while_sending_data
push ebx
call fcn.0042e750
push 2
push esi
call fcn.0042f650
push esi
push ebx
call fcn.004390d0
add esp, 0x18
test eax, eax
jne 0x437c5f
push dword [ebx + 0xcdc]
mov byte [ebx + 0xd90], 1
call dword [0x51b024]
push edi
push ebx
mov dword [ebx + 0x118], eax
call fcn.0043a6d0
add esp, 0xc
jmp case.default.0x43824e
cmp byte [ebx + 0x6cb], 0
je 0x438311
push str.HTTP_error_before_end_of_send__keep_sending
push ebx
call fcn.0042e750
add esp, 8
cmp dword [edi + 0x70], 0
jle case.default.0x43824e
or dword [edi + 0x5c], 2
mov dword [edi + 0x70], 0
jmp case.default.0x43824e
push str.HTTP_error_before_end_of_send__stop_sending
push ebx
call fcn.0042e750
push 2
push esi
call fcn.0042f650
push edi
push ebx
call fcn.0043a6d0
add esp, 0x18
test eax, eax
jne 0x437c5f
mov byte [edi + 0xbc], 1
cmp byte [ebx + 0xd8f], al
je case.default.0x43824e
mov dword [edi + 0x70], 3
cmp byte [ebx + 0xd9b], 0
je 0x438370
cmp dword [esi + 0x204], 0xffffffff
je 0x438370
push str.Keep_sending_data_to_get_tossed_away
push ebx
call fcn.0042e750
add esp, 8
or dword [edi + 0x5c], 2
cmp byte [edi + 0xba], 0
je 0x438534
lea eax, [ebx + 0x8b0]
push eax
call fcn.00425cb0
mov esi, dword [edi + 0x4c]
add esp, 4
cmp byte [esi], 0
je 0x437c5d
mov eax, dword [ebp + 0x10]
mov ecx, esi
mov dword [ebp + 8], ecx
mov eax, dword [eax]
push eax
push 0xa
push ecx
mov dword [ebp - 8], eax
mov dword [ebp - 0xc], eax
call fcn.004b8dc0
mov ecx, eax
add esp, 0xc
test ecx, ecx
jne 0x437bd4
push dword [ebp - 0xc]
lea esi, [ebx + 0x8b0]
push dword [ebp + 8]
push esi
call fcn.00425c20
add esp, 0xc
test eax, eax
jne 0x437c5f
cmp dword [edi + 0x48], eax
jne 0x437c5d
push esi
call fcn.00425c90
add esp, 4
push eax
push esi
call fcn.00425ca0
mov esi, dword [ebp + 0xc]
add esp, 4
push eax
push esi
push ebx
call fcn.00438e10
add esp, 0x10
cmp eax, 2
jne 0x437c5d
push eax
push esi
mov byte [edi + 0xba], 0
mov dword [edi + 0x44], eax
call fcn.0042f650
add esp, 8
cmp byte [ebx + 0x6ec], 0
jne 0x437c5d
push str.Received_HTTP_0.9_when_not_allowed
push ebx
call fcn.0042e690
add esp, 8
mov eax, 1
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
mov ecx, dword [ebp - 0x10]
mov dword [edi + 0x44], 2
mov dword [eax], ecx
mov eax, dword [ebp - 0x14]
mov dword [edi + 0x4c], eax
xor eax, eax
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
push str.Unsupported_HTTP_version_in_response
push ebx
call fcn.0042e690
add esp, 8
mov eax, 1
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
mov eax, 0x66666667
imul edx
sar edx, 2
mov ecx, edx
shr ecx, 0x1f
add ecx, edx
mov edx, dword [ebp - 0xc]
lea eax, [ecx + ecx*4]
add eax, eax
sub edx, eax
push edx
push ecx
push str.Unsupported_HTTP_version___u._d__in_response
push ebx
call fcn.0042e690
add esp, 0x10
mov eax, 1
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
push str.Unsupported_response_code_in_HTTP_response
push ebx
call fcn.0042e690
add esp, 8
mov eax, 1
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
push str.Unsupported_HTTP_1_subversion_in_response
push ebx
call fcn.0042e690
add esp, 8
mov eax, 1
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
pop edi
pop esi
mov eax, 8
pop ebx
mov esp, ebp
pop ebp
ret
mov byte [edi + 0xba], 0
xor eax, eax
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
push str.Received_101__Switching_to_HTTP_2
push ebx
call fcn.0042e750
add esp, 8
mov dword [edi + 0x74], 3
mov byte [edi + 0xba], 1
mov eax, 1
mov dword [edi + 0x48], 0
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
cmp byte [ebx + 0x14c], 0
mov ecx, dword [ebp + 0x14]
jne 0x438565
mov eax, dword [esi + 0x1e8]
test dword [eax + 0x44], 0x40000
je 0x438568
cmp dword [ebx + 0x660], 2
jne 0x438568
cmp dword [edi + 4], 0xffffffff
jg 0x438568
jl 0x438565
cmp dword [edi], 0xffffffff
ja 0x438568
mov byte [ecx], 1
cmp dword [edi + 8], 0
jne 0x438579
cmp dword [edi + 0xc], 0
jne 0x438579
mov byte [ecx], 1
jmp 0x43857e
cmp byte [ecx], 0
je 0x438582
and dword [edi + 0x5c], 0xfffffffe
push dword [ebp - 0xc]
push dword [ebp + 8]
push 1
push ebx
call fcn.0042e5f0
add esp, 0x10
xor eax, eax
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
push esi
push str.The_requested_URL_returned_error:__d
push ebx
call fcn.0042e690
add esp, 0xc
mov eax, 0x16
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret