Function at 0x10008400
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 0x100f5a3d
mov eax, dword fs:[0]
push eax
push ebx
sub esp, 0x50
push esi
push edi
mov eax, dword [0x1010c040]
xor eax, ebp
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov edx, ecx
mov dword [ebp - 0x30], edx
mov eax, dword [ebx + 8]
mov dword [ebp - 0x54], eax
movq xmm0, qword [eax]
mov ecx, dword [eax + 8]
movq qword [ebp - 0x60], xmm0
mov dword [ebp - 0x20], ecx
mov dword [ebp - 0x58], ecx
mov dword [ebp - 4], 0
xorps xmm0, xmm0
mov eax, dword [ebp - 0x60]
xorps xmm1, xmm1
mov esi, eax
movsd qword [ebp - 0x50], xmm0
sub esi, ecx
mov dword [ebp - 0x3c], esi
cmp byte [eax], 0x2d
jne 0x10008483
inc eax
mov byte [ebp - 0x13], 1
mov dword [ebp - 0x60], eax
jmp 0x10008487
mov byte [ebp - 0x13], 0
mov cl, byte [eax]
xor esi, esi
movlpd qword [ebp - 0x48], xmm0
mov byte [ebp - 0x11], 0
mov dword [ebp - 0x2c], esi
cmp cl, 0x30
jne 0x100084aa
lea edi, [eax + 1]
mov dword [ebp - 0x24], esi
mov dword [ebp - 0x60], edi
jmp 0x10008566
cmp cl, 0x31
jl 0x10008bc1
cmp cl, 0x39
jg 0x10008bc1
lea edi, [eax + 1]
movsx ecx, cl
mov al, byte [edi]
sub ecx, 0x30
cmp byte [ebp - 0x13], 0
mov dword [ebp - 0x60], edi
mov dword [ebp - 0x24], ecx
je 0x10008527
cmp al, 0x30
jl 0x10008566
mov edx, edi
cmp al, 0x39
ja 0x10008566
cmp ecx, 0xccccccc
jb 0x100084f5
jne 0x1000851c
mov edx, edi
cmp al, 0x38
ja 0x1000851c
movsx eax, byte [edx]
lea ecx, [ecx + ecx*4]
lea edi, [edx + 1]
inc esi
lea ecx, [ecx - 0x18]
mov dword [ebp - 0x60], edi
mov dword [ebp - 0x2c], esi
lea ecx, [eax + ecx*2]
mov al, byte [edi]
mov dword [ebp - 0x24], ecx
cmp al, 0x30
jl 0x10008566
mov edx, edi
cmp al, 0x39
jle 0x100084e5
jmp 0x10008566
mov dl, 1
mov eax, ecx
xor ecx, ecx
mov byte [ebp - 0x11], dl
jmp 0x1000856f
cmp al, 0x30
jl 0x10008566
mov edx, edi
cmp al, 0x39
jg 0x10008566
cmp ecx, 0x19999999
jb 0x10008541
jne 0x1000851c
mov edx, edi
cmp al, 0x35
jg 0x1000851c
movsx eax, byte [edx]
lea ecx, [ecx + ecx*4]
lea edi, [edx + 1]
inc esi
lea ecx, [ecx - 0x18]
mov dword [ebp - 0x60], edi
mov dword [ebp - 0x2c], esi
lea ecx, [eax + ecx*2]
mov al, byte [edi]
mov dword [ebp - 0x24], ecx
cmp al, 0x30
jl 0x10008566
mov edx, edi
cmp al, 0x39
jle 0x10008531
mov eax, dword [ebp - 0x48]
mov ecx, dword [ebp - 0x44]
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 0x100086a8
mov dl, byte [edi]
cmp byte [ebp - 0x13], dh
je 0x1000862b
cmp dl, 0x30
jl 0x100086a5
mov esi, edi
cmp dl, 0x39
jg 0x100086a5
cmp ecx, 0xccccccc
jb 0x100085c8
ja 0x100085b2
cmp eax, 0xcccccccc
jb 0x100085c8
cmp eax, 0xcccccccc
jne 0x10008615
cmp ecx, 0xccccccc
jne 0x10008615
mov esi, edi
cmp dl, 0x38
ja 0x10008615
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 - 0x60], edi
add eax, eax
add eax, esi
mov dword [ebp - 0x1c], eax
adc edx, ecx
inc dword [ebp - 0x2c]
mov ecx, edx
mov dl, byte [edi]
mov dword [ebp - 0x18], ecx
cmp dl, 0x30
jl 0x100086a2
mov esi, edi
cmp dl, 0x39
jle 0x100085a1
jmp 0x100086a2
mov edx, ecx
mov ecx, eax
call fcn.100f3b50
mov dh, 1
movaps xmm1, xmm0
mov byte [ebp - 0x12], dh
jmp 0x100086a5
cmp dl, 0x30
jl 0x100086a5
mov esi, edi
cmp dl, 0x39
jg 0x100086a5
cmp ecx, 0x19999999
jb 0x1000865e
ja 0x10008648
cmp eax, 0x99999999
jb 0x1000865e
cmp eax, 0x99999999
jne 0x10008615
cmp ecx, 0x19999999
jne 0x10008615
mov esi, edi
cmp dl, 0x35
ja 0x10008615
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 - 0x60], edi
add eax, eax
add eax, esi
mov dword [ebp - 0x1c], eax
adc edx, ecx
inc dword [ebp - 0x2c]
mov ecx, edx
mov dl, byte [edi]
mov dword [ebp - 0x18], ecx
cmp dl, 0x30
jl 0x100086a2
mov esi, edi
cmp dl, 0x39
jle 0x10008637
mov dh, byte [ebp - 0x12]
mov dl, byte [ebp - 0x11]
movsd xmm2, qword [0x101039a0]
test dh, dh
je 0x100086e8
mov al, byte [edi]
cmp al, 0x30
jl 0x100086e8
mov ecx, edi
nop dword [eax]
cmp al, 0x39
ja 0x100086e5
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 0x100086c0
mov dword [ebp - 0x60], edi
mov cl, byte [edi]
mov dword [ebp - 0x28], 0
cmp cl, 0x2e
jne 0x10008701
inc edi
mov eax, edi
mov dword [ebp - 0x60], edi
mov dword [ebp - 0x38], eax
jmp 0x10008706
mov eax, edi
mov dword [ebp - 0x38], edi
cmp cl, 0x2e
jne 0x100087d8
mov cl, byte [eax]
cmp cl, 0x30
jl 0x100087c1
cmp cl, 0x39
jg 0x100087c1
mov cl, byte [ebp - 0x12]
mov esi, dword [ebp - 0x24]
test cl, cl
jne 0x10008755
test dl, dl
je 0x10008739
mov ecx, dword [ebp - 0x1c]
mov edx, dword [ebp - 0x18]
jmp 0x1000873d
mov ecx, esi
xor edx, edx
call fcn.100f3b50
movsd xmm2, qword [0x101039a0]
movaps xmm1, xmm0
mov byte [ebp - 0x12], 1
mov eax, edi
jmp 0x10008758
mov byte [ebp - 0x12], cl
mov dl, byte [edi]
xorps xmm3, xmm3
mov edi, dword [ebp - 0x2c]
mov dword [ebp - 0x44], eax
mov dword [ebp - 0x34], eax
mov dword [ebp - 0x38], eax
nop dword [eax]
mov ecx, dword [ebp - 0x38]
cmp dl, 0x39
jg 0x100087de
cmp edi, 0x11
jge 0x100087a7
dec dword [ebp - 0x28]
lea ecx, [eax + 1]
movsx eax, byte [eax]
mov edx, ecx
sub eax, 0x30
mulsd xmm1, xmm2
mov dword [ebp - 0x60], edx
movd xmm0, eax
cvtdq2pd xmm0, xmm0
addsd xmm1, xmm0
comisd xmm1, xmm3
jbe 0x100087b0
inc edi
jmp 0x100087b0
mov ecx, dword [ebp - 0x34]
inc ecx
mov edx, ecx
mov dword [ebp - 0x60], edx
mov dl, byte [edx]
mov eax, ecx
mov dword [ebp - 0x34], ecx
mov dword [ebp - 0x38], eax
cmp dl, 0x30
jge 0x10008770
jmp 0x100087de
mov ecx, dword [ebp - 0x30]
mov esi, dword [ebp - 0x20]
sub eax, esi
mov dword [ecx + 0x18], 0xe
mov dword [ecx + 0x1c], eax
jmp 0x10008bd0
mov esi, dword [ebp - 0x24]
mov ecx, dword [ebp - 0x38]
xor edi, edi
cmp byte [ecx], 0x65
je 0x100087ee
cmp byte [ecx], 0x45
jne 0x100088bc
cmp byte [ebp - 0x12], 0
lea edi, [ecx + 1]
mov dword [ebp - 0x60], edi
jne 0x10008818
cmp byte [ebp - 0x11], 0
je 0x10008808
mov esi, dword [ebp - 0x1c]
mov edx, dword [ebp - 0x18]
jmp 0x1000880a
xor edx, edx
mov ecx, esi
call fcn.100f3b50
movaps xmm1, xmm0
mov byte [ebp - 0x12], 1
mov cl, byte [edi]
xor dl, dl
cmp cl, 0x2b
je 0x10008828
cmp cl, 0x2d
jne 0x1000882f
mov dl, 1
mov cl, byte [edi + 1]
inc edi
mov dword [ebp - 0x60], edi
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x10008937
lea esi, [edi + 1]
movsx edi, cl
mov cl, byte [esi]
sub edi, 0x30
mov dword [ebp - 0x60], esi
mov byte [ebp - 0x14], cl
test dl, dl
je 0x100088fe
mov ecx, dword [ebp - 0x28]
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 - 0x44], eax
jl 0x100088ba
mov al, byte [esi]
cmp al, 0x39
jg 0x100088ba
movsx eax, byte [esi]
lea ecx, [edi + edi*4]
lea edi, [ecx - 0x18]
lea edx, [esi + 1]
mov dword [ebp - 0x60], edx
mov esi, edx
lea edi, [eax + edi*2]
cmp edi, dword [ebp - 0x44]
jle 0x100088b4
mov al, byte [edx]
cmp al, 0x30
jl 0x100088b4
mov ecx, edx
nop dword [eax]
cmp al, 0x39
ja 0x100088b1
lea esi, [ecx + 1]
mov edx, esi
mov ecx, esi
mov al, byte [edx]
cmp al, 0x30
jge 0x100088a0
mov dword [ebp - 0x60], edx
mov al, byte [edx]
cmp al, 0x30
jge 0x10008878
neg edi
mov edx, dword [ebp - 0x28]
cmp byte [ebp - 0x12], 0
je 0x100089ef
lea eax, [edi + edx]
cmp eax, 0xfffffecc
jge 0x1000894e
divsd xmm1, qword [0x10104378]
add eax, 0x134
cmp eax, 0xfffffecc
jl 0x10008976
shl eax, 3
mov ecx, 0x100ff590
sub ecx, eax
movaps xmm0, xmm1
divsd xmm0, qword [ecx]
jmp 0x10008971
mov edx, dword [ebp - 0x28]
mov eax, 0x134
sub eax, edx
mov dword [ebp - 0x44], eax
cmp cl, 0x30
jl 0x100088bf
mov al, byte [esi]
cmp al, 0x39
jg 0x100088bc
movsx eax, byte [esi]
lea ecx, [edi + edi*4]
lea edi, [ecx - 0x18]
lea edx, [esi + 1]
mov dword [ebp - 0x60], edx
lea edi, [eax + edi*2]
cmp edi, dword [ebp - 0x44]
jg 0x10008985
mov al, byte [edx]
mov esi, edx
cmp al, 0x30
jge 0x10008912
jmp 0x100088bc
mov ecx, dword [ebp - 0x30]
mov esi, dword [ebp - 0x20]
sub edi, esi
mov dword [ecx + 0x18], 0xf
mov dword [ecx + 0x1c], edi
jmp 0x10008bd0
lea ecx, [eax*8]
movaps xmm0, xmm1
test eax, eax
js 0x10008966
mulsd xmm0, qword [ecx + 0x100ff590]
jmp 0x10008971
mov eax, 0x100ff590
sub eax, ecx
divsd xmm0, qword [eax]
movsd qword [ebp - 0x50], xmm0
movsd xmm0, qword [ebp - 0x50]
comisd xmm0, xmmword [0x10104380]
jbe 0x1000899d
mov ecx, dword [ebp - 0x30]
mov eax, dword [ebp - 0x3c]
mov dword [ecx + 0x18], 0xd
mov dword [ecx + 0x1c], eax
mov esi, dword [ebp - 0x20]
jmp 0x10008bd0
cmp byte [ebp - 0x13], 0
je 0x100089aa
xorps xmm0, xmmword [0x10104760]
mov esi, dword [ebx + 0xc]
movsd qword [ebp - 0x50], xmm0
mov eax, dword [esi + 0x28]
sub eax, dword [esi + 0x24]
cmp eax, 0x10
jge 0x100089c6
push ecx
lea ecx, [esi + 0x18]
call fcn.10008de0
mov ecx, dword [esi + 0x24]
xorps xmm0, xmm0
movsd xmm3, qword [ebp - 0x50]
lea eax, [ecx + 0x10]
mov dword [esi + 0x24], eax
mov eax, 0x216
mov esi, dword [ebp - 0x20]
movups xmmword [ecx], xmm0
mov word [ecx + 0xe], ax
movsd qword [ecx], xmm3
jmp 0x10008bd0
mov edi, dword [ebx + 0xc]
add edi, 0x18
cmp byte [ebp - 0x11], 0
mov eax, dword [edi + 0x10]
je 0x10008b39
cmp byte [ebp - 0x13], 0
je 0x10008ab7
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 0x10008a2f
push ecx
mov ecx, edi
call fcn.10008de0
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 0x10008a8f
jg 0x10008a56
test esi, esi
jb 0x10008a8f
mov eax, 0x196
mov word [edx + 0xe], ax
mov edi, eax
xor eax, eax
or eax, ecx
jne 0x10008a72
mov eax, 0x1d6
mov word [edx + 0xe], ax
mov edi, eax
and esi, 0x80000000
or esi, ecx
jne 0x10008995
mov esi, dword [ebp - 0x20]
or edi, 0x20
mov word [edx + 0xe], di
jmp 0x10008bd0
cmp ecx, 0xffffffff
jl 0x10008995
jg 0x10008aa6
cmp esi, 0x80000000
jb 0x10008995
mov esi, dword [ebp - 0x20]
mov eax, 0xb6
mov word [edx + 0xe], ax
jmp 0x10008bd0
sub eax, dword [edi + 0xc]
cmp eax, 0x10
jge 0x10008ac7
push ecx
mov ecx, edi
call fcn.10008de0
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 0x10008b01
jg 0x10008af6
test ecx, ecx
jb 0x10008b01
mov eax, 0x196
mov word [esi + 0xe], ax
mov edi, eax
movzx eax, di
mov dword [ebp - 0x44], eax
xor eax, eax
or eax, edx
jne 0x10008b19
or edi, 0x40
mov word [esi + 0xe], di
movzx eax, di
jmp 0x10008b1c
mov eax, dword [ebp - 0x44]
and ecx, 0x80000000
or ecx, edx
jne 0x10008995
or eax, 0x20
mov word [esi + 0xe], ax
mov esi, dword [ebp - 0x20]
jmp 0x10008bd0
sub eax, dword [edi + 0xc]
cmp byte [ebp - 0x13], 0
je 0x10008b83
mov esi, dword [ebp - 0x24]
neg esi
cmp eax, 0x10
jge 0x10008b54
push ecx
mov ecx, edi
call fcn.10008de0
mov ecx, dword [edi + 0xc]
xorps xmm0, xmm0
test esi, esi
lea eax, [ecx + 0x10]
mov dword [edi + 0xc], eax
mov eax, esi
mov esi, dword [ebp - 0x20]
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 0x10008bd0
cmp eax, 0x10
jge 0x10008b90
push ecx
mov ecx, edi
call fcn.10008de0
mov ecx, dword [edi + 0xc]
xorps xmm0, xmm0
mov esi, dword [ebp - 0x20]
lea eax, [ecx + 0x10]
mov dword [edi + 0xc], eax
mov eax, dword [ebp - 0x24]
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 0x10008bd0
mov esi, dword [ebp - 0x20]
sub eax, esi
mov dword [edx + 0x18], 3
mov dword [edx + 0x1c], eax
mov eax, dword [ebx + 8]
movq xmm0, qword [ebp - 0x60]
movq qword [eax], xmm0
mov dword [eax + 8], esi
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