Function at 0x100083e0
Capabilities:
Validate payment card number using luhn algorithm

Disassembly:
push ebx
mov ebx, esp
sub esp, 8
and esp, 0xfffffff8
add esp, 4
push ebp
mov ebp, dword [ebx + 4]
mov dword [esp + 4], ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x100f4fcd
mov eax, dword fs:[0]
push eax
push ebx
sub esp, 0x40
push esi
push edi
mov eax, dword [0x1010b040]
xor eax, ebp
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov dword [ebp - 0x2c], ecx
mov eax, dword [ebx + 8]
mov dword [ebp - 0x44], eax
movq xmm0, qword [eax]
mov edi, dword [eax + 8]
movq qword [ebp - 0x50], xmm0
mov dword [ebp - 0x30], edi
mov dword [ebp - 0x48], edi
mov dword [ebp - 4], 0
xorps xmm1, xmm1
mov esi, dword [ebp - 0x50]
mov eax, esi
sub eax, edi
mov dword [ebp - 0x38], eax
cmp byte [esi], 0x2d
jne 0x10008457
inc esi
mov dl, 1
mov dword [ebp - 0x50], esi
jmp 0x10008459
xor dl, dl
mov al, byte [esi]
xorps xmm0, xmm0
mov byte [ebp - 0x13], dl
movlpd qword [ebp - 0x40], xmm0
mov byte [ebp - 0x11], 0
mov dword [ebp - 0x20], 0
cmp al, 0x30
jne 0x10008487
lea edi, [esi + 1]
mov dword [ebp - 0x28], 0
mov dword [ebp - 0x50], edi
jmp 0x1000853d
cmp al, 0x31
jl 0x10008b77
cmp al, 0x39
jg 0x10008b77
movsx ecx, al
lea edi, [esi + 1]
mov al, byte [edi]
sub ecx, 0x30
mov dword [ebp - 0x50], edi
mov dword [ebp - 0x28], ecx
test dl, dl
je 0x100084ff
cmp al, 0x30
jl 0x1000853d
mov edx, edi
mov esi, edi
cmp al, 0x39
ja 0x1000853d
cmp ecx, 0xccccccc
jb 0x100084d0
jne 0x100084f4
mov edx, esi
cmp al, 0x38
ja 0x100084f4
movsx eax, byte [edx]
lea ecx, [ecx + ecx*4]
inc dword [ebp - 0x20]
lea edi, [edx + 1]
lea ecx, [ecx - 0x18]
mov dword [ebp - 0x50], edi
mov edx, edi
mov esi, edi
lea ecx, [eax + ecx*2]
mov al, byte [edi]
mov dword [ebp - 0x28], ecx
cmp al, 0x30
jge 0x100084b8
jmp 0x1000853d
mov dl, 1
mov eax, ecx
xor ecx, ecx
mov byte [ebp - 0x11], dl
jmp 0x10008546
cmp al, 0x30
jl 0x1000853d
mov edx, edi
mov esi, edi
cmp al, 0x39
jg 0x1000853d
cmp ecx, 0x19999999
jb 0x1000851b
jne 0x100084f4
mov edx, esi
cmp al, 0x35
jg 0x100084f4
movsx eax, byte [edx]
lea ecx, [ecx + ecx*4]
inc dword [ebp - 0x20]
lea edi, [edx + 1]
lea ecx, [ecx - 0x18]
mov dword [ebp - 0x50], edi
mov edx, edi
mov esi, edi
lea ecx, [eax + ecx*2]
mov al, byte [edi]
mov dword [ebp - 0x28], ecx
cmp al, 0x30
jge 0x10008507
mov eax, dword [ebp - 0x40]
mov ecx, dword [ebp - 0x3c]
mov dl, byte [ebp - 0x11]
xor dh, dh
mov dword [ebp - 0x1c], eax
mov dword [ebp - 0x18], ecx
mov byte [ebp - 0x12], dh
test dl, dl
je 0x10008685
mov dl, byte [edi]
cmp byte [ebp - 0x13], dh
je 0x10008600
cmp dl, 0x30
jl 0x10008682
mov esi, edi
mov dword [ebp - 0x24], esi
cmp dl, 0x39
ja 0x1000867f
cmp ecx, 0xccccccc
jb 0x100085a3
ja 0x1000858c
cmp eax, 0xcccccccc
jb 0x100085a3
cmp eax, 0xcccccccc
jne 0x100085ea
cmp ecx, 0xccccccc
jne 0x100085ea
mov esi, dword [ebp - 0x24]
cmp dl, 0x38
ja 0x100085ea
shld ecx, eax, 2
lea edi, [esi + 1]
xor edx, edx
movsx esi, byte [esi]
shl eax, 2
sub esi, 0x30
add dword [ebp - 0x1c], eax
mov eax, dword [ebp - 0x1c]
adc dword [ebp - 0x18], ecx
mov ecx, dword [ebp - 0x18]
shld ecx, eax, 1
mov dword [ebp - 0x50], edi
add eax, eax
mov dword [ebp - 0x24], edi
add eax, esi
mov esi, edi
mov dword [ebp - 0x1c], eax
adc edx, ecx
inc dword [ebp - 0x20]
mov ecx, edx
mov dl, byte [edi]
mov dword [ebp - 0x18], ecx
cmp dl, 0x30
jge 0x10008572
jmp 0x1000867f
mov edx, ecx
mov ecx, eax
call fcn.100f30e0
mov dh, 1
movaps xmm1, xmm0
mov byte [ebp - 0x12], dh
jmp 0x10008682
cmp dl, 0x30
jl 0x10008682
mov esi, edi
mov dword [ebp - 0x24], esi
nop
cmp dl, 0x39
ja 0x1000867f
cmp ecx, 0x19999999
jb 0x1000863d
ja 0x10008626
cmp eax, 0x99999999
jb 0x1000863d
cmp eax, 0x99999999
jne 0x100085ea
cmp ecx, 0x19999999
jne 0x100085ea
mov esi, dword [ebp - 0x24]
cmp dl, 0x35
ja 0x100085ea
shld ecx, eax, 2
lea edi, [esi + 1]
xor edx, edx
movsx esi, byte [esi]
shl eax, 2
sub esi, 0x30
add dword [ebp - 0x1c], eax
mov eax, dword [ebp - 0x1c]
adc dword [ebp - 0x18], ecx
mov ecx, dword [ebp - 0x18]
shld ecx, eax, 1
mov dword [ebp - 0x50], edi
add eax, eax
mov dword [ebp - 0x24], edi
add eax, esi
mov esi, edi
mov dword [ebp - 0x1c], eax
adc edx, ecx
inc dword [ebp - 0x20]
mov ecx, edx
mov dl, byte [edi]
mov dword [ebp - 0x18], ecx
cmp dl, 0x30
jge 0x10008610
mov dh, byte [ebp - 0x12]
mov dl, byte [ebp - 0x11]
movsd xmm2, qword [0x101029b0]
test dh, dh
je 0x100086c8
mov al, byte [edi]
cmp al, 0x30
jl 0x100086c8
mov ecx, edi
nop dword [eax]
cmp al, 0x39
ja 0x100086c5
movsx eax, byte [ecx]
lea edi, [ecx + 1]
sub eax, 0x30
mulsd xmm1, xmm2
mov ecx, edi
movd xmm0, eax
mov al, byte [edi]
cvtdq2pd xmm0, xmm0
addsd xmm1, xmm0
cmp al, 0x30
jge 0x100086a0
mov dword [ebp - 0x50], edi
mov al, byte [edi]
mov dword [ebp - 0x24], 0
cmp al, 0x2e
jne 0x100086d9
inc edi
mov dword [ebp - 0x50], edi
mov esi, edi
cmp al, 0x2e
jne 0x10008785
mov al, byte [esi]
cmp al, 0x30
jl 0x100087aa
cmp al, 0x39
jg 0x100087aa
test dh, dh
jne 0x10008720
test dl, dl
je 0x10008705
mov ecx, dword [ebp - 0x1c]
mov edx, dword [ebp - 0x18]
jmp 0x1000870a
mov ecx, dword [ebp - 0x28]
xor edx, edx
call fcn.100f30e0
movsd xmm2, qword [0x101029b0]
movaps xmm1, xmm0
mov byte [ebp - 0x12], 1
jmp 0x10008723
mov byte [ebp - 0x12], dh
mov cl, byte [edi]
mov eax, esi
mov edx, dword [ebp - 0x20]
xorps xmm3, xmm3
mov dword [ebp - 0x34], esi
mov edi, esi
mov dword [ebp - 0x3c], esi
mov esi, edi
cmp cl, 0x39
jg 0x10008782
cmp edx, 0x11
jge 0x1000876b
dec dword [ebp - 0x24]
lea esi, [eax + 1]
movsx eax, byte [eax]
mov ecx, esi
sub eax, 0x30
mulsd xmm1, xmm2
mov dword [ebp - 0x50], ecx
movd xmm0, eax
cvtdq2pd xmm0, xmm0
addsd xmm1, xmm0
comisd xmm1, xmm3
jbe 0x10008774
inc edx
jmp 0x10008774
mov esi, dword [ebp - 0x34]
inc esi
mov ecx, esi
mov dword [ebp - 0x50], ecx
mov cl, byte [ecx]
mov eax, esi
mov dword [ebp - 0x34], eax
mov edi, eax
cmp cl, 0x30
jge 0x10008735
mov dh, byte [ebp - 0x12]
xor edi, edi
cmp byte [esi], 0x65
je 0x10008795
cmp byte [esi], 0x45
jne 0x10008871
inc esi
mov dword [ebp - 0x50], esi
test dh, dh
jne 0x100087ce
cmp byte [ebp - 0x11], dh
je 0x100087bd
mov ecx, dword [ebp - 0x1c]
mov edx, dword [ebp - 0x18]
jmp 0x100087c2
mov eax, dword [ebp - 0x2c]
mov ecx, 0xe
add eax, 0x18
sub esi, dword [ebp - 0x30]
jmp 0x10008b81
mov ecx, dword [ebp - 0x28]
xor edx, edx
call fcn.100f30e0
movaps xmm1, xmm0
mov byte [ebp - 0x12], 1
mov cl, byte [esi]
xor dl, dl
cmp cl, 0x2b
je 0x100087de
cmp cl, 0x2d
jne 0x100087e5
mov dl, 1
mov cl, byte [esi + 1]
inc esi
mov dword [ebp - 0x50], esi
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x100088fb
inc esi
movsx edi, cl
sub edi, 0x30
mov dword [ebp - 0x50], esi
mov cl, byte [esi]
mov byte [ebp - 0x14], cl
test dl, dl
je 0x100088a8
mov ecx, dword [ebp - 0x24]
mov eax, 0x66666667
add ecx, 0x7ffffff7
imul ecx
sar edx, 2
mov eax, edx
shr eax, 0x1f
add eax, edx
cmp byte [ebp - 0x14], 0x30
mov dword [ebp - 0x3c], eax
jl 0x1000886f
mov al, byte [esi]
nop dword [eax]
cmp al, 0x39
jg 0x1000886f
movsx eax, byte [esi]
lea ecx, [edi + edi*4]
lea edi, [ecx - 0x18]
lea edx, [esi + 1]
mov dword [ebp - 0x50], edx
mov esi, edx
lea edi, [eax + edi*2]
cmp edi, dword [ebp - 0x3c]
jle 0x10008869
mov al, byte [edx]
cmp al, 0x30
jl 0x10008869
mov ecx, edx
cmp al, 0x39
ja 0x10008866
lea esi, [ecx + 1]
mov edx, esi
mov ecx, esi
mov al, byte [edx]
cmp al, 0x30
jge 0x10008855
mov dword [ebp - 0x50], edx
mov al, byte [edx]
cmp al, 0x30
jge 0x10008830
neg edi
mov edx, dword [ebp - 0x24]
cmp byte [ebp - 0x12], 0
je 0x100089b4
lea eax, [edi + edx]
cmp eax, 0xfffffecc
jge 0x10008923
divsd xmm1, qword [0x10103388]
add eax, 0x134
cmp eax, 0xfffffecc
jge 0x10008910
xorps xmm0, xmm0
jmp 0x10008946
mov edx, dword [ebp - 0x24]
mov eax, 0x134
sub eax, edx
mov dword [ebp - 0x3c], eax
cmp cl, 0x30
jl 0x10008874
mov al, byte [esi]
nop dword [eax]
cmp al, 0x39
jg 0x10008871
movsx eax, byte [esi]
lea ecx, [edi + edi*4]
lea edi, [ecx - 0x18]
lea edx, [esi + 1]
mov dword [ebp - 0x50], edx
lea edi, [eax + edi*2]
cmp edi, dword [ebp - 0x3c]
jg 0x100088e5
mov al, byte [edx]
mov esi, edx
cmp al, 0x30
jge 0x100088c0
jmp 0x10008871
mov eax, dword [ebp - 0x2c]
mov ecx, 0xd
mov esi, dword [ebp - 0x38]
add eax, 0x18
lea edx, [eax + 4]
jmp 0x10008b8a
mov eax, dword [ebp - 0x2c]
sub esi, dword [ebp - 0x30]
mov dword [eax + 0x18], 0xf
mov dword [eax + 0x1c], esi
jmp 0x10008b8e
shl eax, 3
mov ecx, 0x100fe5a0
sub ecx, eax
movaps xmm0, xmm1
divsd xmm0, qword [ecx]
jmp 0x10008946
lea ecx, [eax*8]
movaps xmm0, xmm1
test eax, eax
js 0x1000893b
mulsd xmm0, qword [ecx + 0x100fe5a0]
jmp 0x10008946
mov eax, 0x100fe5a0
sub eax, ecx
divsd xmm0, qword [eax]
comisd xmm0, xmmword [0x10103390]
jbe 0x10008965
mov eax, dword [ebp - 0x2c]
mov esi, dword [ebp - 0x38]
mov dword [eax + 0x18], 0xd
mov dword [eax + 0x1c], esi
jmp 0x10008b8e
cmp byte [ebp - 0x13], 0
je 0x10008972
xorps xmm0, xmmword [0x10103770]
mov esi, dword [ebx + 0xc]
movsd qword [ebp - 0x40], xmm0
mov eax, dword [esi + 0x28]
sub eax, dword [esi + 0x24]
cmp eax, 0x10
jge 0x1000898e
push ecx
lea ecx, [esi + 0x18]
call fcn.10008da0
mov ecx, dword [esi + 0x24]
xorps xmm0, xmm0
movsd xmm3, qword [ebp - 0x40]
lea eax, [ecx + 0x10]
mov dword [esi + 0x24], eax
mov eax, 0x216
movups xmmword [ecx], xmm0
mov word [ecx + 0xe], ax
movsd qword [ecx], xmm3
jmp 0x10008b8e
mov edi, dword [ebx + 0xc]
add edi, 0x18
cmp byte [ebp - 0x11], 0
mov eax, dword [edi + 0x10]
je 0x10008af5
cmp byte [ebp - 0x13], 0
je 0x10008a76
mov esi, dword [ebp - 0x1c]
mov ecx, dword [ebp - 0x18]
neg esi
adc ecx, 0
sub eax, dword [edi + 0xc]
neg ecx
mov dword [ebp - 0x18], ecx
cmp eax, 0x10
jge 0x100089f4
push ecx
mov ecx, edi
call fcn.10008da0
mov ecx, dword [ebp - 0x18]
mov edx, dword [edi + 0xc]
xorps xmm0, xmm0
lea eax, [edx + 0x10]
mov dword [edi + 0xc], eax
mov eax, 0x96
movups xmmword [edx], xmm0
mov dword [edx], esi
mov dword [edx + 4], ecx
mov word [edx + 0xe], ax
test ecx, ecx
jl 0x10008a51
jg 0x10008a1b
test esi, esi
jb 0x10008a51
mov eax, 0x196
mov word [edx + 0xe], ax
mov edi, eax
xor eax, eax
or eax, ecx
jne 0x10008a37
mov eax, 0x1d6
mov word [edx + 0xe], ax
mov edi, eax
and esi, 0x80000000
or esi, ecx
jne 0x10008b8e
or edi, 0x20
mov word [edx + 0xe], di
jmp 0x10008b8e
cmp ecx, 0xffffffff
jl 0x10008b8e
jg 0x10008a68
cmp esi, 0x80000000
jb 0x10008b8e
mov eax, 0xb6
mov word [edx + 0xe], ax
jmp 0x10008b8e
sub eax, dword [edi + 0xc]
cmp eax, 0x10
jge 0x10008a86
push ecx
mov ecx, edi
call fcn.10008da0
mov esi, dword [edi + 0xc]
xorps xmm0, xmm0
mov edx, dword [ebp - 0x18]
mov ecx, dword [ebp - 0x1c]
lea eax, [esi + 0x10]
mov dword [edi + 0xc], eax
mov eax, 0x116
mov edi, eax
movups xmmword [esi], xmm0
mov dword [esi], ecx
mov dword [esi + 4], edx
mov word [esi + 0xe], ax
test edx, edx
jl 0x10008ac0
jg 0x10008ab5
test ecx, ecx
jb 0x10008ac0
mov eax, 0x196
mov word [esi + 0xe], ax
mov edi, eax
movzx eax, di
mov dword [ebp - 0x3c], eax
xor eax, eax
or eax, edx
jne 0x10008ad8
or edi, 0x40
mov word [esi + 0xe], di
movzx eax, di
jmp 0x10008adb
mov eax, dword [ebp - 0x3c]
and ecx, 0x80000000
or ecx, edx
jne 0x10008b8e
or eax, 0x20
mov word [esi + 0xe], ax
jmp 0x10008b8e
sub eax, dword [edi + 0xc]
cmp byte [ebp - 0x13], 0
je 0x10008b3c
mov esi, dword [ebp - 0x28]
neg esi
cmp eax, 0x10
jge 0x10008b10
push ecx
mov ecx, edi
call fcn.10008da0
mov ecx, dword [edi + 0xc]
xorps xmm0, xmm0
test esi, esi
lea eax, [ecx + 0x10]
mov dword [edi + 0xc], eax
mov eax, esi
cdq
movups xmmword [ecx], xmm0
mov dword [ecx], eax
mov eax, 0xb6
mov dword [ecx + 4], edx
mov edx, 0x1f6
cmovns eax, edx
mov word [ecx + 0xe], ax
jmp 0x10008b8e
cmp eax, 0x10
jge 0x10008b49
push ecx
mov ecx, edi
call fcn.10008da0
mov ecx, dword [edi + 0xc]
xorps xmm0, xmm0
lea eax, [ecx + 0x10]
mov dword [edi + 0xc], eax
mov eax, dword [ebp - 0x28]
movups xmmword [ecx], xmm0
mov dword [ecx], eax
shr eax, 0x1a
not eax
mov dword [ecx + 4], 0
and eax, 0x20
or eax, 0x1d6
mov word [ecx + 0xe], ax
jmp 0x10008b8e
lea eax, [ecx + 0x18]
sub esi, edi
mov ecx, 3
mov edi, 4
mov edx, eax
add edx, edi
mov dword [eax], ecx
mov dword [edx], esi
mov ecx, dword [ebx + 8]
movq xmm0, qword [ebp - 0x50]
mov eax, dword [ebp - 0x30]
movq qword [ecx], xmm0
mov dword [ecx + 8], eax
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret 8