Function at 0x44ab00
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 0x5c904d
mov eax, dword fs:[0]
push eax
push ebx
sub esp, 0x50
mov eax, dword [0x654c00]
xor eax, ebp
mov dword [ebp - 0x14], eax
push esi
push edi
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov edi, ecx
mov dword [ebp - 0x4c], edi
mov eax, dword [ebx + 8]
mov ecx, dword [ebx + 0xc]
mov dword [ebp - 0x54], ecx
mov dword [ebp - 0x60], eax
movq xmm0, qword [eax]
mov ecx, dword [eax + 8]
movq qword [ebp - 0x24], xmm0
mov dword [ebp - 0x58], ecx
mov dword [ebp - 0x1c], ecx
mov dword [ebp - 0x18], eax
mov dword [ebp - 4], 0
xorps xmm1, xmm1
mov esi, dword [ebp - 0x24]
mov eax, esi
sub eax, ecx
mov dword [ebp - 0x50], eax
cmp byte [esi], 0x2d
jne 0x44ab85
inc esi
mov dl, 1
mov dword [ebp - 0x24], esi
jmp 0x44ab87
xor dl, dl
mov al, byte [esi]
xorps xmm0, xmm0
mov byte [ebp - 0x27], dl
movlpd qword [ebp - 0x48], xmm0
mov byte [ebp - 0x25], 0
mov dword [ebp - 0x38], 0
cmp al, 0x30
jne 0x44abb5
lea edi, [esi + 1]
mov dword [ebp - 0x40], 0
mov dword [ebp - 0x24], edi
jmp 0x44ac67
cmp al, 0x31
jl 0x44b27c
cmp al, 0x39
jg 0x44b27c
movsx ecx, al
lea edi, [esi + 1]
mov al, byte [edi]
sub ecx, 0x30
mov dword [ebp - 0x24], edi
mov dword [ebp - 0x40], ecx
test dl, dl
je 0x44ac29
cmp al, 0x30
jl 0x44ac67
mov edx, edi
mov esi, edi
cmp al, 0x39
ja 0x44ac67
cmp ecx, 0xccccccc
jb 0x44abfa
jne 0x44ac1e
mov edx, esi
cmp al, 0x38
ja 0x44ac1e
movsx eax, byte [edx]
lea ecx, [ecx + ecx*4]
inc dword [ebp - 0x38]
lea edi, [edx + 1]
lea ecx, [ecx - 0x18]
mov dword [ebp - 0x24], edi
mov edx, edi
mov esi, edi
lea ecx, [eax + ecx*2]
mov al, byte [edi]
mov dword [ebp - 0x40], ecx
cmp al, 0x30
jge 0x44abe6
jmp 0x44ac67
mov dl, 1
mov eax, ecx
xor ecx, ecx
mov byte [ebp - 0x25], dl
jmp 0x44ac70
cmp al, 0x30
jl 0x44ac67
mov edx, edi
mov esi, edi
cmp al, 0x39
jg 0x44ac67
cmp ecx, 0x19999999
jb 0x44ac45
jne 0x44ac1e
mov edx, esi
cmp al, 0x35
jg 0x44ac1e
movsx eax, byte [edx]
lea ecx, [ecx + ecx*4]
inc dword [ebp - 0x38]
lea edi, [edx + 1]
lea ecx, [ecx - 0x18]
mov dword [ebp - 0x24], edi
mov edx, edi
mov esi, edi
lea ecx, [eax + ecx*2]
mov al, byte [edi]
mov dword [ebp - 0x40], ecx
cmp al, 0x30
jge 0x44ac31
mov eax, dword [ebp - 0x48]
mov ecx, dword [ebp - 0x44]
mov dl, byte [ebp - 0x25]
xor dh, dh
mov dword [ebp - 0x2c], eax
mov dword [ebp - 0x30], ecx
mov byte [ebp - 0x26], dh
test dl, dl
je 0x44adaa
mov dl, byte [edi]
cmp byte [ebp - 0x27], dh
je 0x44ad2b
cmp dl, 0x30
jl 0x44ada7
mov esi, edi
mov dword [ebp - 0x34], esi
nop dword [eax]
cmp dl, 0x39
ja 0x44ada4
cmp ecx, 0xccccccc
jb 0x44acd1
ja 0x44acba
cmp eax, 0xcccccccc
jb 0x44acd1
cmp eax, 0xcccccccc
jne 0x44ad18
cmp ecx, 0xccccccc
jne 0x44ad18
mov esi, dword [ebp - 0x34]
cmp dl, 0x38
ja 0x44ad18
shld ecx, eax, 2
lea edi, [esi + 1]
xor edx, edx
movsx esi, byte [esi]
shl eax, 2
sub esi, 0x30
add dword [ebp - 0x2c], eax
mov eax, dword [ebp - 0x2c]
adc dword [ebp - 0x30], ecx
mov ecx, dword [ebp - 0x30]
shld ecx, eax, 1
mov dword [ebp - 0x24], edi
add eax, eax
mov dword [ebp - 0x34], edi
add eax, esi
mov esi, edi
mov dword [ebp - 0x2c], eax
adc edx, ecx
inc dword [ebp - 0x38]
mov ecx, edx
mov dl, byte [edi]
mov dword [ebp - 0x30], ecx
cmp dl, 0x30
jge 0x44aca0
jmp 0x44ada4
mov edx, ecx
mov ecx, eax
call fcn.005c6340
mov dh, 1
movaps xmm1, xmm0
mov byte [ebp - 0x26], dh
jmp 0x44ada7
cmp dl, 0x30
jl 0x44ada7
mov esi, edi
mov dword [ebp - 0x34], esi
cmp dl, 0x39
ja 0x44ada4
cmp ecx, 0x19999999
jb 0x44ad62
ja 0x44ad4b
cmp eax, 0x99999999
jb 0x44ad62
cmp eax, 0x99999999
jne 0x44ad18
cmp ecx, 0x19999999
jne 0x44ad18
mov esi, dword [ebp - 0x34]
cmp dl, 0x35
ja 0x44ad18
shld ecx, eax, 2
lea edi, [esi + 1]
xor edx, edx
movsx esi, byte [esi]
shl eax, 2
sub esi, 0x30
add dword [ebp - 0x2c], eax
mov eax, dword [ebp - 0x2c]
adc dword [ebp - 0x30], ecx
mov ecx, dword [ebp - 0x30]
shld ecx, eax, 1
mov dword [ebp - 0x24], edi
add eax, eax
mov dword [ebp - 0x34], edi
add eax, esi
mov esi, edi
mov dword [ebp - 0x2c], eax
adc edx, ecx
inc dword [ebp - 0x38]
mov ecx, edx
mov dl, byte [edi]
mov dword [ebp - 0x30], ecx
cmp dl, 0x30
jge 0x44ad35
mov dh, byte [ebp - 0x26]
mov dl, byte [ebp - 0x25]
movsd xmm2, qword [0x644c10]
test dh, dh
je 0x44ade8
mov al, byte [edi]
cmp al, 0x30
jl 0x44ade8
mov ecx, edi
nop
cmp al, 0x39
ja 0x44ade5
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 0x44adc0
mov dword [ebp - 0x24], edi
mov al, byte [edi]
mov dword [ebp - 0x34], 0
cmp al, 0x2e
jne 0x44adf9
inc edi
mov dword [ebp - 0x24], edi
mov esi, edi
cmp al, 0x2e
jne 0x44aea5
mov al, byte [esi]
cmp al, 0x30
jl 0x44aeca
cmp al, 0x39
jg 0x44aeca
test dh, dh
jne 0x44ae40
test dl, dl
je 0x44ae25
mov ecx, dword [ebp - 0x2c]
mov edx, dword [ebp - 0x30]
jmp 0x44ae2a
mov ecx, dword [ebp - 0x40]
xor edx, edx
call fcn.005c6340
movsd xmm2, qword [0x644c10]
movaps xmm1, xmm0
mov byte [ebp - 0x26], 1
jmp 0x44ae43
mov byte [ebp - 0x26], dh
mov cl, byte [edi]
mov eax, esi
mov edx, dword [ebp - 0x38]
xorps xmm3, xmm3
mov dword [ebp - 0x5c], esi
mov edi, esi
mov dword [ebp - 0x44], esi
mov esi, edi
cmp cl, 0x39
jg 0x44aea2
cmp edx, 0x11
jge 0x44ae8b
dec dword [ebp - 0x34]
lea esi, [eax + 1]
movsx eax, byte [eax]
mov ecx, esi
sub eax, 0x30
mulsd xmm1, xmm2
mov dword [ebp - 0x24], ecx
movd xmm0, eax
cvtdq2pd xmm0, xmm0
addsd xmm1, xmm0
comisd xmm1, xmm3
jbe 0x44ae94
inc edx
jmp 0x44ae94
mov esi, dword [ebp - 0x5c]
inc esi
mov ecx, esi
mov dword [ebp - 0x24], ecx
mov cl, byte [ecx]
mov eax, esi
mov dword [ebp - 0x5c], eax
mov edi, eax
cmp cl, 0x30
jge 0x44ae55
mov dh, byte [ebp - 0x26]
xor edi, edi
cmp byte [esi], 0x65
je 0x44aeb5
cmp byte [esi], 0x45
jne 0x44af91
inc esi
mov dword [ebp - 0x24], esi
test dh, dh
jne 0x44aeee
cmp byte [ebp - 0x25], dh
je 0x44aedd
mov ecx, dword [ebp - 0x2c]
mov edx, dword [ebp - 0x30]
jmp 0x44aee2
mov ecx, dword [ebp - 0x4c]
mov eax, 0xe
sub esi, dword [ebp - 0x58]
mov dword [ebp - 0x50], ecx
jmp 0x44b289
mov ecx, dword [ebp - 0x40]
xor edx, edx
call fcn.005c6340
movaps xmm1, xmm0
mov byte [ebp - 0x26], 1
mov cl, byte [esi]
xor dl, dl
cmp cl, 0x2b
je 0x44aefe
cmp cl, 0x2d
jne 0x44af05
mov dl, 1
mov cl, byte [esi + 1]
inc esi
mov dword [ebp - 0x24], esi
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x44b005
inc esi
movsx edi, cl
sub edi, 0x30
mov dword [ebp - 0x24], esi
mov cl, byte [esi]
mov byte [ebp - 0x39], cl
test dl, dl
je 0x44afc8
mov ecx, dword [ebp - 0x34]
mov eax, 0x66666667
add ecx, 0x7ffffff7
imul ecx
sar edx, 2
mov eax, edx
shr eax, 0x1f
add eax, edx
cmp byte [ebp - 0x39], 0x30
mov dword [ebp - 0x44], eax
jl 0x44af8f
mov al, byte [esi]
nop dword [eax]
cmp al, 0x39
jg 0x44af8f
movsx eax, byte [esi]
lea ecx, [edi + edi*4]
lea edi, [ecx - 0x18]
lea edx, [esi + 1]
mov dword [ebp - 0x24], edx
mov esi, edx
lea edi, [eax + edi*2]
cmp edi, dword [ebp - 0x44]
jle 0x44af89
mov al, byte [edx]
cmp al, 0x30
jl 0x44af89
mov ecx, edx
cmp al, 0x39
ja 0x44af86
lea esi, [ecx + 1]
mov edx, esi
mov ecx, esi
mov al, byte [edx]
cmp al, 0x30
jge 0x44af75
mov dword [ebp - 0x24], edx
mov al, byte [edx]
cmp al, 0x30
jge 0x44af50
neg edi
mov edx, dword [ebp - 0x34]
cmp byte [ebp - 0x26], 0
je 0x44b0be
lea eax, [edi + edx]
cmp eax, 0xfffffecc
jge 0x44b02d
divsd xmm1, qword [0x644c20]
add eax, 0x134
cmp eax, 0xfffffecc
jge 0x44b01a
xorps xmm0, xmm0
jmp 0x44b050
mov edx, dword [ebp - 0x34]
mov eax, 0x134
sub eax, edx
mov dword [ebp - 0x44], eax
cmp cl, 0x30
jl 0x44af94
mov al, byte [esi]
nop dword [eax]
cmp al, 0x39
jg 0x44af91
movsx eax, byte [esi]
lea ecx, [edi + edi*4]
lea edi, [ecx - 0x18]
lea edx, [esi + 1]
mov dword [ebp - 0x24], edx
lea edi, [eax + edi*2]
cmp edi, dword [ebp - 0x44]
jg 0x44b05a
mov al, byte [edx]
mov esi, edx
cmp al, 0x30
jge 0x44afe0
jmp 0x44af91
mov eax, dword [ebp - 0x4c]
sub esi, dword [ebp - 0x58]
mov dword [eax + 0x18], 0xf
mov dword [eax + 0x1c], esi
jmp 0x44b29f
shl eax, 3
mov ecx, 0x63ed00
sub ecx, eax
movaps xmm0, xmm1
divsd xmm0, qword [ecx]
jmp 0x44b050
lea ecx, [eax*8]
movaps xmm0, xmm1
test eax, eax
js 0x44b045
mulsd xmm0, qword [ecx + 0x63ed00]
jmp 0x44b050
mov eax, 0x63ed00
sub eax, ecx
divsd xmm0, qword [eax]
comisd xmm0, xmmword [0x644c28]
jbe 0x44b06f
mov eax, dword [ebp - 0x4c]
mov ecx, dword [ebp - 0x50]
mov dword [eax + 0x18], 0xd
mov dword [eax + 0x1c], ecx
jmp 0x44b29f
cmp byte [ebp - 0x27], 0
je 0x44b07c
xorps xmm0, xmmword [0x644d40]
mov esi, dword [ebp - 0x54]
movsd qword [ebp - 0x48], xmm0
mov eax, dword [esi + 0x28]
sub eax, dword [esi + 0x24]
cmp eax, 0x10
jge 0x44b098
push ecx
lea ecx, [esi + 0x18]
call fcn.0044b4c0
mov ecx, dword [esi + 0x24]
xorps xmm0, xmm0
movsd xmm3, qword [ebp - 0x48]
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 0x44b29f
mov edx, dword [ebp - 0x54]
mov eax, dword [edx + 0x28]
lea edi, [edx + 0x18]
sub eax, dword [edi + 0xc]
cmp byte [ebp - 0x25], 0
je 0x44b1fd
cmp byte [ebp - 0x27], 0
je 0x44b181
mov esi, dword [ebp - 0x2c]
mov edi, dword [ebp - 0x30]
neg esi
adc edi, 0
neg edi
cmp eax, 0x10
jge 0x44b0fc
push ecx
lea ecx, [edx + 0x18]
call fcn.0044b4c0
mov edx, dword [ebp - 0x54]
lea ecx, [edx + 0x18]
xorps xmm0, xmm0
mov edx, dword [ecx + 0xc]
lea eax, [edx + 0x10]
mov dword [ecx + 0xc], eax
mov eax, 0x96
movups xmmword [edx], xmm0
mov dword [edx], esi
mov dword [edx + 4], edi
mov word [edx + 0xe], ax
test edi, edi
jl 0x44b15c
jg 0x44b126
test esi, esi
jb 0x44b15c
mov eax, 0x196
mov word [edx + 0xe], ax
mov ecx, eax
xor eax, eax
or eax, edi
jne 0x44b142
mov eax, 0x1d6
mov word [edx + 0xe], ax
mov ecx, eax
and esi, 0x80000000
or esi, edi
jne 0x44b29f
or ecx, 0x20
mov word [edx + 0xe], cx
jmp 0x44b29f
cmp edi, 0xffffffff
jl 0x44b29f
jg 0x44b173
cmp esi, 0x80000000
jb 0x44b29f
mov eax, 0xb6
mov word [edx + 0xe], ax
jmp 0x44b29f
cmp eax, 0x10
jge 0x44b18e
push ecx
mov ecx, edi
call fcn.0044b4c0
mov esi, dword [edi + 0xc]
xorps xmm0, xmm0
mov edx, dword [ebp - 0x30]
mov ecx, dword [ebp - 0x2c]
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 0x44b1c8
jg 0x44b1bd
test ecx, ecx
jb 0x44b1c8
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 0x44b1e0
or edi, 0x40
mov word [esi + 0xe], di
movzx eax, di
jmp 0x44b1e3
mov eax, dword [ebp - 0x44]
and ecx, 0x80000000
or ecx, edx
jne 0x44b29f
or eax, 0x20
mov word [esi + 0xe], ax
jmp 0x44b29f
cmp byte [ebp - 0x27], 0
je 0x44b241
mov esi, dword [ebp - 0x40]
neg esi
cmp eax, 0x10
jge 0x44b215
push ecx
mov ecx, edi
call fcn.0044b4c0
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 0x44b29f
cmp eax, 0x10
jge 0x44b24e
push ecx
mov ecx, edi
call fcn.0044b4c0
mov ecx, dword [edi + 0xc]
xorps xmm0, xmm0
lea eax, [ecx + 0x10]
mov dword [edi + 0xc], eax
mov eax, dword [ebp - 0x40]
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 0x44b29f
sub esi, ecx
mov dword [ebp - 0x50], edi
mov eax, 3
mov dword [ebp - 0x4c], edi
mov ecx, dword [ebp - 0x4c]
mov edi, 0x18
mov edx, 0x1c
mov dword [ecx + edi], eax
mov ecx, dword [ebp - 0x50]
mov dword [ecx + edx], esi
mov ecx, dword [ebp - 0x60]
movq xmm0, qword [ebp - 0x24]
mov eax, dword [ebp - 0x58]
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 ecx, dword [ebp - 0x14]
xor ecx, ebp
call fcn.005c56ce
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret 8