Function at 0x41f1f0
Capabilities:
Validate payment card number using luhn algorithm

Disassembly:
push ebx
push ebp
push esi
mov esi, dword [esp + 0x14]
mov al, byte [esi]
test al, al
push edi
je 0x41f58b
cmp al, 0x25
jne 0x41f571
push 3
add esi, 1
push 0x49eac0
push esi
call fcn.00485dba
add esp, 0xc
test eax, eax
jne 0x41f331
movsx eax, byte [esi + 3]
add esi, 3
sub eax, 0x25
add esi, 1
cmp eax, 0x4d
ja case.default.0x41f510
movzx eax, byte [eax + 0x41f5ac]
jmp dword [eax*4 + 0x41f59c]
mov ecx, dword [esp + 0x1c]
mov al, byte [ecx + 1]
add ecx, 1
test al, al
je 0x41f581
mov edx, dword [esp + 0x14]
nop
add ecx, 1
mov byte [edx], al
mov al, byte [ecx]
add edx, 1
test al, al
jne 0x41f260
mov dword [esp + 0x14], edx
jmp 0x41f581
mov cl, byte [esi]
xor eax, eax
cmp cl, 0x30
jl 0x41f299
cmp cl, 0x39
jg 0x41f299
lea edx, [eax + eax*4]
add esi, 1
movsx eax, cl
mov cl, byte [esi]
cmp cl, 0x30
lea eax, [eax + edx*2 - 0x30]
jge 0x41f280
mov edx, dword [esp + 0x1c]
add edx, 1
test eax, eax
je 0x41f2bf
mov edi, dword [esp + 0x14]
mov cl, byte [edx]
test cl, cl
je 0x41f2bb
mov byte [edi], cl
add edi, 1
add edx, 1
sub eax, 1
jne 0x41f2a8
mov dword [esp + 0x14], edi
cmp byte [esi], 0x25
je 0x41f57e
pop edi
pop esi
pop ebp
xor al, al
pop ebx
ret
mov al, byte [esi]
xor edi, edi
cmp al, 0x30
jl 0x41f2ee
cmp al, 0x39
jg 0x41f2ee
add esi, 1
movsx edx, al
mov al, byte [esi]
cmp al, 0x30
lea ecx, [edi + edi*4]
lea edi, [edx + ecx*2 - 0x30]
jge 0x41f2d7
mov ebx, dword [esp + 0x1c]
lea eax, [ebx + 1]
push eax
call dword [sym.imp.KERNEL32.dll_lstrlenA]
cmp eax, edi
jge 0x41f302
mov edi, eax
sub eax, edi
test edi, edi
lea ecx, [eax + ebx + 1]
je 0x41f327
mov edx, dword [esp + 0x14]
mov al, byte [ecx]
test al, al
je 0x41f323
mov byte [edx], al
add edx, 1
add ecx, 1
sub edi, 1
jne 0x41f310
mov dword [esp + 0x14], edx
cmp byte [esi], 0x25
jne case.default.0x41f510
jmp 0x41f57e
mov al, byte [esi]
cmp al, 0x70
je 0x41f33b
cmp al, 0x50
jne case.default.0x41f510
movsx eax, byte [esi + 1]
add esi, 1
sub eax, 0x31
js case.default.0x41f510
cmp eax, 9
jg case.default.0x41f510
mov ecx, dword [esp + 0x1c]
mov ebp, dword [ecx + eax*4 + 0x48]
movsx eax, byte [esi + 1]
add esi, 1
sub eax, 0x25
add esi, 1
cmp eax, 0x50
ja case.default.0x41f510
movzx edx, byte [eax + 0x41f60c]
jmp dword [edx*4 + 0x41f5fc]
mov al, byte [esi]
xor ecx, ecx
cmp al, 0x30
jl 0x41f39b
cmp al, 0x39
jg 0x41f39b
add esi, 1
movsx edx, al
mov al, byte [esi]
cmp al, 0x30
lea ecx, [ecx + ecx*4]
lea ecx, [edx + ecx*2 - 0x30]
jge 0x41f384
lea eax, [ecx - 1]
cmp eax, 8
ja case.default.0x41f510
jmp dword [eax*4 + 0x41f660]
mov ecx, 0xa
jmp 0x41f3eb
mov ecx, 0x64
jmp 0x41f3eb
mov ecx, 0x3e8
jmp 0x41f3eb
mov ecx, 0x2710
jmp 0x41f3eb
mov ecx, 0x186a0
jmp 0x41f3eb
mov ecx, 0xf4240
jmp 0x41f3eb
mov ecx, 0x989680
jmp 0x41f3eb
mov ecx, 0x5f5e100
jmp 0x41f3eb
mov ecx, 0x3b9aca00
cmp ebp, ecx
jl 0x41f3f6
mov eax, ebp
cdq
idiv ecx
mov ebp, edx
mov eax, 0x66666667
imul ecx
sar edx, 2
mov ecx, edx
shr ecx, 0x1f
add ecx, edx
cmp byte [esi], 0x25
jne case.default.0x41f510
add esi, 1
test ecx, ecx
je 0x41f581
jmp 0x41f420
mov eax, ebp
cdq
idiv ecx
mov ebx, eax
mov eax, 0x66666667
imul ecx
sar edx, 2
mov eax, edx
shr eax, 0x1f
add bl, 0x30
add eax, edx
mov ecx, eax
jne 0x41f420
mov ecx, dword [esp + 0x14]
mov byte [ecx], bl
jmp 0x41f581
mov al, byte [esi]
xor ecx, ecx
cmp al, 0x30
jl 0x41f469
cmp al, 0x39
jg 0x41f469
add esi, 1
movsx edx, al
mov al, byte [esi]
cmp al, 0x30
lea ecx, [ecx + ecx*4]
lea ecx, [edx + ecx*2 - 0x30]
jge 0x41f452
lea eax, [ecx - 1]
cmp eax, 8
ja case.default.0x41f510
jmp dword [eax*4 + 0x41f684]
mov ecx, 0xa
jmp 0x41f4b9
mov ecx, 0x64
jmp 0x41f4b9
mov ecx, 0x3e8
jmp 0x41f4b9
mov ecx, 0x2710
jmp 0x41f4b9
mov ecx, 0x186a0
jmp 0x41f4b9
mov ecx, 0xf4240
jmp 0x41f4b9
mov ecx, 0x989680
jmp 0x41f4b9
mov ecx, 0x5f5e100
jmp 0x41f4b9
mov ecx, 0x3b9aca00
cmp ebp, ecx
jl 0x41f3f6
mov eax, 0x66666667
imul ebp
sar edx, 2
mov eax, edx
shr eax, 0x1f
add eax, edx
mov ebp, eax
cmp ebp, ecx
jge 0x41f4c1
jmp 0x41f3f6
test ebp, ebp
mov ecx, ebp
je 0x41f4ff
xor edi, edi
mov eax, 0x66666667
imul ecx
sar edx, 2
mov ecx, edx
shr ecx, 0x1f
add ecx, edx
add edi, 1
test ecx, ecx
jne 0x41f4e5
jmp 0x41f504
mov edi, 1
lea eax, [edi - 1]
cmp eax, 8
ja case.default.0x41f510
jmp dword [eax*4 + 0x41f6a8]
mov ecx, 1
jmp 0x41f420
mov ecx, 0xa
jmp 0x41f420
mov ecx, 0x64
jmp 0x41f420
mov ecx, 0x3e8
jmp 0x41f420
mov ecx, 0x2710
jmp 0x41f420
mov ecx, 0x186a0
jmp 0x41f420
mov ecx, 0xf4240
jmp 0x41f420
mov ecx, 0x989680
jmp 0x41f420
mov ecx, 0x5f5e100
jmp 0x41f420
mov ecx, dword [esp + 0x14]
mov byte [ecx], al
add ecx, 1
mov dword [esp + 0x14], ecx
add esi, 1
mov al, byte [esi]
test al, al
jne 0x41f202
mov edx, dword [esp + 0x14]
pop edi
pop esi
pop ebp
mov byte [edx], 0
mov al, 1
pop ebx
ret