Function at 0x1005fa40
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 0x1008cead
mov eax, dword fs:[0]
push eax
push ebx
sub esp, 0x60
mov eax, dword [0x100a9040]
xor eax, ebp
mov dword [ebp - 0x14], eax
push esi
push edi
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov edx, ecx
mov dword [ebp - 0x58], edx
mov eax, dword [ebx + 8]
mov ecx, dword [ebx + 0xc]
mov dword [ebp - 0x6c], ecx
mov dword [ebp - 0x70], eax
movq xmm0, qword [eax]
mov ecx, dword [eax + 8]
movq qword [ebp - 0x24], xmm0
mov dword [ebp - 0x34], ecx
mov dword [ebp - 0x1c], ecx
mov dword [ebp - 0x18], eax
mov dword [ebp - 4], 0
xorps xmm0, xmm0
mov eax, dword [ebp - 0x24]
xorps xmm2, xmm2
mov esi, eax
movsd qword [ebp - 0x60], xmm0
sub esi, ecx
mov dword [ebp - 0x68], esi
cmp byte [eax], 0x2d
jne 0x1005facf
inc eax
mov byte [ebp - 0x27], 1
mov dword [ebp - 0x24], eax
jmp 0x1005fad3
mov byte [ebp - 0x27], 0
mov cl, byte [eax]
xor esi, esi
movlpd qword [ebp - 0x50], xmm0
mov byte [ebp - 0x25], 0
mov dword [ebp - 0x44], esi
cmp cl, 0x30
jne 0x1005faf6
lea edi, [eax + 1]
mov dword [ebp - 0x38], esi
mov dword [ebp - 0x24], edi
jmp 0x1005fbb5
cmp cl, 0x31
jl 0x1006020b
cmp cl, 0x39
jg 0x1006020b
lea edi, [eax + 1]
movsx ecx, cl
mov al, byte [edi]
sub ecx, 0x30
cmp byte [ebp - 0x27], 0
mov dword [ebp - 0x24], edi
mov dword [ebp - 0x38], ecx
je 0x1005fb73
cmp al, 0x30
jl 0x1005fbb5
mov edx, edi
cmp al, 0x39
ja 0x1005fbb5
cmp ecx, 0xccccccc
jb 0x1005fb41
jne 0x1005fb68
mov edx, edi
cmp al, 0x38
ja 0x1005fb68
movsx eax, byte [edx]
lea ecx, [ecx + ecx*4]
lea edi, [edx + 1]
inc esi
lea ecx, [ecx - 0x18]
mov dword [ebp - 0x24], edi
mov dword [ebp - 0x44], esi
lea ecx, [eax + ecx*2]
mov al, byte [edi]
mov dword [ebp - 0x38], ecx
cmp al, 0x30
jl 0x1005fbb5
mov edx, edi
cmp al, 0x39
jle 0x1005fb31
jmp 0x1005fbb5
mov dl, 1
mov eax, ecx
xor ecx, ecx
mov byte [ebp - 0x25], dl
jmp 0x1005fbbe
cmp al, 0x30
jl 0x1005fbb5
mov edx, edi
cmp al, 0x39
jg 0x1005fbb5
nop dword [eax]
cmp ecx, 0x19999999
jb 0x1005fb90
jne 0x1005fb68
mov edx, edi
cmp al, 0x35
jg 0x1005fb68
movsx eax, byte [edx]
lea ecx, [ecx + ecx*4]
lea edi, [edx + 1]
inc esi
lea ecx, [ecx - 0x18]
mov dword [ebp - 0x24], edi
mov dword [ebp - 0x44], esi
lea ecx, [eax + ecx*2]
mov al, byte [edi]
mov dword [ebp - 0x38], ecx
cmp al, 0x30
jl 0x1005fbb5
mov edx, edi
cmp al, 0x39
jle 0x1005fb80
mov eax, dword [ebp - 0x50]
mov ecx, dword [ebp - 0x4c]
mov dl, byte [ebp - 0x25]
xor dh, dh
mov dword [ebp - 0x30], eax
mov dword [ebp - 0x2c], ecx
mov byte [ebp - 0x26], dh
test dl, dl
je 0x1005fcf7
mov dl, byte [edi]
cmp byte [ebp - 0x27], dh
je 0x1005fc7a
cmp dl, 0x30
jl 0x1005fcf4
mov esi, edi
cmp dl, 0x39
jg 0x1005fcf4
cmp ecx, 0xccccccc
jb 0x1005fc17
ja 0x1005fc01
cmp eax, 0xcccccccc
jb 0x1005fc17
cmp eax, 0xcccccccc
jne 0x1005fc64
cmp ecx, 0xccccccc
jne 0x1005fc64
mov esi, edi
cmp dl, 0x38
ja 0x1005fc64
shld ecx, eax, 2
lea edi, [esi + 1]
xor edx, edx
movsx esi, byte [esi]
shl eax, 2
sub esi, 0x30
add dword [ebp - 0x30], eax
mov eax, dword [ebp - 0x30]
adc dword [ebp - 0x2c], ecx
mov ecx, dword [ebp - 0x2c]
shld ecx, eax, 1
mov dword [ebp - 0x24], edi
add eax, eax
add eax, esi
mov dword [ebp - 0x30], eax
adc edx, ecx
inc dword [ebp - 0x44]
mov ecx, edx
mov dl, byte [edi]
mov dword [ebp - 0x2c], ecx
cmp dl, 0x30
jl 0x1005fcf1
mov esi, edi
cmp dl, 0x39
jle 0x1005fbf0
jmp 0x1005fcf1
mov edx, ecx
mov ecx, eax
call fcn.10068ea0
mov dh, 1
movaps xmm2, xmm0
mov byte [ebp - 0x26], dh
jmp 0x1005fcf4
cmp dl, 0x30
jl 0x1005fcf4
mov esi, edi
cmp dl, 0x39
jg 0x1005fcf4
cmp ecx, 0x19999999
jb 0x1005fcad
ja 0x1005fc97
cmp eax, 0x99999999
jb 0x1005fcad
cmp eax, 0x99999999
jne 0x1005fc64
cmp ecx, 0x19999999
jne 0x1005fc64
mov esi, edi
cmp dl, 0x35
ja 0x1005fc64
shld ecx, eax, 2
lea edi, [esi + 1]
xor edx, edx
movsx esi, byte [esi]
shl eax, 2
sub esi, 0x30
add dword [ebp - 0x30], eax
mov eax, dword [ebp - 0x30]
adc dword [ebp - 0x2c], ecx
mov ecx, dword [ebp - 0x2c]
shld ecx, eax, 1
mov dword [ebp - 0x24], edi
add eax, eax
add eax, esi
mov dword [ebp - 0x30], eax
adc edx, ecx
inc dword [ebp - 0x44]
mov ecx, edx
mov dl, byte [edi]
mov dword [ebp - 0x2c], ecx
cmp dl, 0x30
jl 0x1005fcf1
mov esi, edi
cmp dl, 0x39
jle 0x1005fc86
mov dh, byte [ebp - 0x26]
mov dl, byte [ebp - 0x25]
movsd xmm1, qword [0x100a0710]
test dh, dh
je 0x1005fd38
mov al, byte [edi]
cmp al, 0x30
jl 0x1005fd38
mov ecx, edi
nop dword [eax + eax]
cmp al, 0x39
ja 0x1005fd35
movsx eax, byte [ecx]
lea edi, [ecx + 1]
sub eax, 0x30
mulsd xmm2, xmm1
mov ecx, edi
movd xmm0, eax
mov al, byte [edi]
cvtdq2pd xmm0, xmm0
addsd xmm2, xmm0
cmp al, 0x30
jge 0x1005fd10
mov dword [ebp - 0x24], edi
mov cl, byte [edi]
mov dword [ebp - 0x3c], 0
cmp cl, 0x2e
jne 0x1005fd51
inc edi
mov eax, edi
mov dword [ebp - 0x24], edi
mov dword [ebp - 0x54], eax
jmp 0x1005fd56
mov eax, edi
mov dword [ebp - 0x54], edi
cmp cl, 0x2e
jne 0x1005fe28
mov cl, byte [eax]
cmp cl, 0x30
jl 0x1005fe11
cmp cl, 0x39
jg 0x1005fe11
mov cl, byte [ebp - 0x26]
mov esi, dword [ebp - 0x38]
test cl, cl
jne 0x1005fda5
test dl, dl
je 0x1005fd89
mov ecx, dword [ebp - 0x30]
mov edx, dword [ebp - 0x2c]
jmp 0x1005fd8d
mov ecx, esi
xor edx, edx
call fcn.10068ea0
movsd xmm1, qword [0x100a0710]
movaps xmm2, xmm0
mov byte [ebp - 0x26], 1
mov eax, edi
jmp 0x1005fda8
mov byte [ebp - 0x26], cl
mov dl, byte [edi]
xorps xmm3, xmm3
mov edi, dword [ebp - 0x44]
mov dword [ebp - 0x4c], eax
mov dword [ebp - 0x64], eax
mov dword [ebp - 0x54], eax
nop dword [eax]
mov ecx, dword [ebp - 0x54]
cmp dl, 0x39
jg 0x1005fe2e
cmp edi, 0x11
jge 0x1005fdf7
dec dword [ebp - 0x3c]
lea ecx, [eax + 1]
movsx eax, byte [eax]
mov edx, ecx
sub eax, 0x30
mulsd xmm2, xmm1
mov dword [ebp - 0x24], edx
movd xmm0, eax
cvtdq2pd xmm0, xmm0
addsd xmm2, xmm0
comisd xmm2, xmm3
jbe 0x1005fe00
inc edi
jmp 0x1005fe00
mov ecx, dword [ebp - 0x64]
inc ecx
mov edx, ecx
mov dword [ebp - 0x24], edx
mov dl, byte [edx]
mov eax, ecx
mov dword [ebp - 0x64], ecx
mov dword [ebp - 0x54], eax
cmp dl, 0x30
jge 0x1005fdc0
jmp 0x1005fe2e
mov ecx, dword [ebp - 0x58]
mov esi, dword [ebp - 0x34]
sub eax, esi
mov dword [ecx + 0x18], 0xe
mov dword [ecx + 0x1c], eax
jmp 0x1006021a
mov esi, dword [ebp - 0x38]
mov ecx, dword [ebp - 0x54]
xor edi, edi
cmp byte [ecx], 0x65
je 0x1005fe3e
cmp byte [ecx], 0x45
jne 0x1005ff0c
cmp byte [ebp - 0x26], 0
lea edi, [ecx + 1]
mov dword [ebp - 0x24], edi
jne 0x1005fe68
cmp byte [ebp - 0x25], 0
je 0x1005fe58
mov esi, dword [ebp - 0x30]
mov edx, dword [ebp - 0x2c]
jmp 0x1005fe5a
xor edx, edx
mov ecx, esi
call fcn.10068ea0
movaps xmm2, xmm0
mov byte [ebp - 0x26], 1
mov cl, byte [edi]
xor dl, dl
cmp cl, 0x2b
je 0x1005fe78
cmp cl, 0x2d
jne 0x1005fe7f
mov dl, 1
mov cl, byte [edi + 1]
inc edi
mov dword [ebp - 0x24], edi
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x1005ff87
lea esi, [edi + 1]
movsx edi, cl
mov cl, byte [esi]
sub edi, 0x30
mov dword [ebp - 0x24], esi
mov byte [ebp - 0x3d], cl
test dl, dl
je 0x1005ff4e
mov ecx, dword [ebp - 0x3c]
mov eax, 0x66666667
add ecx, 0x7ffffff7
imul ecx
sar edx, 2
mov eax, edx
shr eax, 0x1f
add eax, edx
cmp byte [ebp - 0x3d], 0x30
mov dword [ebp - 0x4c], eax
jl 0x1005ff0a
mov al, byte [esi]
cmp al, 0x39
jg 0x1005ff0a
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 - 0x4c]
jle 0x1005ff04
mov al, byte [edx]
cmp al, 0x30
jl 0x1005ff04
mov ecx, edx
nop dword [eax]
cmp al, 0x39
ja 0x1005ff01
lea esi, [ecx + 1]
mov edx, esi
mov ecx, esi
mov al, byte [edx]
cmp al, 0x30
jge 0x1005fef0
mov dword [ebp - 0x24], edx
mov al, byte [edx]
cmp al, 0x30
jge 0x1005fec8
neg edi
mov edx, dword [ebp - 0x3c]
cmp byte [ebp - 0x26], 0
je 0x1006003f
lea eax, [edi + edx]
cmp eax, 0xfffffecc
jge 0x1005ff9e
divsd xmm2, qword [0x100a0760]
add eax, 0x134
cmp eax, 0xfffffecc
jl 0x1005ffc6
shl eax, 3
mov ecx, 0x1009f910
sub ecx, eax
movaps xmm0, xmm2
divsd xmm0, qword [ecx]
jmp 0x1005ffc1
mov edx, dword [ebp - 0x3c]
mov eax, 0x134
sub eax, edx
mov dword [ebp - 0x4c], eax
cmp cl, 0x30
jl 0x1005ff0f
mov al, byte [esi]
cmp al, 0x39
jg 0x1005ff0c
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 - 0x4c]
jg 0x1005ffd5
mov al, byte [edx]
mov esi, edx
cmp al, 0x30
jge 0x1005ff62
jmp 0x1005ff0c
mov ecx, dword [ebp - 0x58]
mov esi, dword [ebp - 0x34]
sub edi, esi
mov dword [ecx + 0x18], 0xf
mov dword [ecx + 0x1c], edi
jmp 0x1006021a
lea ecx, [eax*8]
movaps xmm0, xmm2
test eax, eax
js 0x1005ffb6
mulsd xmm0, qword [ecx + 0x1009f910]
jmp 0x1005ffc1
mov eax, 0x1009f910
sub eax, ecx
divsd xmm0, qword [eax]
movsd qword [ebp - 0x60], xmm0
movsd xmm0, qword [ebp - 0x60]
comisd xmm0, xmmword [0x100a0768]
jbe 0x1005ffed
mov ecx, dword [ebp - 0x58]
mov eax, dword [ebp - 0x68]
mov dword [ecx + 0x18], 0xd
mov dword [ecx + 0x1c], eax
mov esi, dword [ebp - 0x34]
jmp 0x1006021a
cmp byte [ebp - 0x27], 0
je 0x1005fffa
xorps xmm0, xmmword [0x100a16e0]
mov edi, dword [ebp - 0x6c]
movsd qword [ebp - 0x60], xmm0
mov eax, dword [edi + 0x28]
sub eax, dword [edi + 0x24]
cmp eax, 0x10
jge 0x10060016
push ecx
lea ecx, [edi + 0x18]
call fcn.10060410
mov ecx, dword [edi + 0x24]
xorps xmm0, xmm0
movsd xmm3, qword [ebp - 0x60]
mov esi, dword [ebp - 0x34]
lea eax, [ecx + 0x10]
mov dword [edi + 0x24], eax
mov eax, 0x216
movups xmmword [ecx], xmm0
mov word [ecx + 0xe], ax
movsd qword [ecx], xmm3
jmp 0x1006021a
mov edi, dword [ebp - 0x6c]
add edi, 0x18
mov eax, dword [edi + 0x10]
sub eax, dword [edi + 0xc]
cmp byte [ebp - 0x25], 0
je 0x10060186
cmp byte [ebp - 0x27], 0
je 0x10060107
mov esi, dword [ebp - 0x30]
mov ecx, dword [ebp - 0x2c]
neg esi
adc ecx, 0
neg ecx
mov dword [ebp - 0x2c], ecx
cmp eax, 0x10
jge 0x1006007f
push ecx
mov ecx, edi
call fcn.10060410
mov ecx, dword [ebp - 0x2c]
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 0x100600df
jg 0x100600a6
test esi, esi
jb 0x100600df
mov eax, 0x196
mov word [edx + 0xe], ax
mov edi, eax
xor eax, eax
or eax, ecx
jne 0x100600c2
mov eax, 0x1d6
mov word [edx + 0xe], ax
mov edi, eax
and esi, 0x80000000
or esi, ecx
jne 0x1005ffe5
mov esi, dword [ebp - 0x34]
or edi, 0x20
mov word [edx + 0xe], di
jmp 0x1006021a
cmp ecx, 0xffffffff
jl 0x1005ffe5
jg 0x100600f6
cmp esi, 0x80000000
jb 0x1005ffe5
mov esi, dword [ebp - 0x34]
mov eax, 0xb6
mov word [edx + 0xe], ax
jmp 0x1006021a
cmp eax, 0x10
jge 0x10060114
push ecx
mov ecx, edi
call fcn.10060410
mov esi, dword [edi + 0xc]
xorps xmm0, xmm0
mov edx, dword [ebp - 0x2c]
mov ecx, dword [ebp - 0x30]
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 0x1006014e
jg 0x10060143
test ecx, ecx
jb 0x1006014e
mov eax, 0x196
mov word [esi + 0xe], ax
mov edi, eax
movzx eax, di
mov dword [ebp - 0x4c], eax
xor eax, eax
or eax, edx
jne 0x10060166
or edi, 0x40
mov word [esi + 0xe], di
movzx eax, di
jmp 0x10060169
mov eax, dword [ebp - 0x4c]
and ecx, 0x80000000
or ecx, edx
jne 0x1005ffe5
or eax, 0x20
mov word [esi + 0xe], ax
mov esi, dword [ebp - 0x34]
jmp 0x1006021a
cmp byte [ebp - 0x27], 0
je 0x100601cd
mov esi, dword [ebp - 0x38]
neg esi
cmp eax, 0x10
jge 0x1006019e
push ecx
mov ecx, edi
call fcn.10060410
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 - 0x34]
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 0x1006021a
cmp eax, 0x10
jge 0x100601da
push ecx
mov ecx, edi
call fcn.10060410
mov ecx, dword [edi + 0xc]
xorps xmm0, xmm0
mov esi, dword [ebp - 0x34]
lea eax, [ecx + 0x10]
mov dword [edi + 0xc], eax
mov eax, dword [ebp - 0x38]
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 0x1006021a
mov esi, dword [ebp - 0x34]
sub eax, esi
mov dword [edx + 0x18], 3
mov dword [edx + 0x1c], eax
mov eax, dword [ebp - 0x70]
movq xmm0, qword [ebp - 0x24]
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 ecx, dword [ebp - 0x14]
xor ecx, ebp
call fcn.10067e95
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret 8