Function at 0x140037490
Capabilities:
Validate payment card number using luhn algorithm

Disassembly:
mov qword [rsp + 8], rbx
mov qword [rsp + 0x10], rbp
mov qword [rsp + 0x18], rsi
mov qword [rsp + 0x20], rdi
push r12
push r14
push r15
sub rsp, 0x50
mov r14, qword [rsp + 0x98]
xor r12d, r12d
mov r15, r9
mov rbp, r8
mov rsi, rdx
mov rdi, rcx
mov qword [r14], r12
movzx eax, byte [rdx]
cmp al, 0xa
je 0x140037a04
cmp al, 0xd
je 0x140037a04
lea r14, [rcx + 0x13c]
mov ebx, 4
mov ecx, dword [r14]
mov r15d, 1
lea eax, [rcx + 1]
mov dword [r14], eax
test ecx, ecx
jne 0x14003791f
mov dword [rdi + 0x148], r12d
mov rax, qword [rdi + 0x18]
mov rcx, qword [rax + 0x3e0]
mov eax, dword [rcx + 0x8c]
test al, 3
je 0x1400376bd
movzx eax, byte [rdx]
mov rbx, rdx
test al, al
je 0x14003753c
cmp al, 0x20
je 0x140037531
cmp byte [rbx], 9
jne 0x14003753c
movzx eax, byte [rbx + 1]
inc rbx
test al, al
jne 0x140037528
mov r8d, 5
lea rdx, [0x140078740]
mov rcx, rbx
call sub.api_ms_win_crt_string_l1_1_0.dll_strncmp
test eax, eax
jne 0x1400375f5
movsx edx, byte [rbx + 5]
mov ecx, edx
sub ecx, 0x31
je 0x140037625
sub ecx, r15d
je 0x140037589
cmp ecx, r15d
je 0x140037589
lea rdx, [0x140078c90]
mov rcx, rdi
call fcn.140023120
mov eax, r15d
jmp 0x140037a8d
movzx eax, byte [rbx + 6]
cmp al, 0x20
je 0x140037595
cmp al, 9
jne 0x1400375f5
lea eax, [rdx - 0x30]
lea ecx, [rax + rax*4]
add ecx, ecx
mov dword [rdi + 0x148], ecx
movsx ecx, byte [rbx + 7]
lea eax, [rcx - 0x30]
cmp al, 9
ja 0x1400375f5
movsx edx, byte [rbx + 8]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x1400375f5
movsx r8d, byte [rbx + 9]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x1400375f5
lea ecx, [rcx + rcx*4]
lea ecx, [rdx + rcx*2]
lea ecx, [rcx + rcx*4]
lea ecx, [rcx - 0xa68]
lea ecx, [r8 + rcx*2]
mov dword [rdi + 0x14c], ecx
movzx eax, byte [rbx + 0xa]
cmp al, 0x20
je 0x1400377a0
sub al, 9
cmp al, 4
jbe 0x1400377a0
mov r8, rbp
mov rdx, rsi
mov rcx, rdi
call fcn.140036650
cmp eax, r15d
jne 0x14003794a
mov dword [rdi + 0x14c], 0xc8
mov dword [rdi + 0x148], 0xa
jmp 0x1400377a0
cmp byte [rbx + 6], 0x2e
jne 0x1400376a6
movsx ecx, byte [rbx + 7]
lea eax, [rcx - 0x30]
cmp al, r15b
ja 0x1400376a6
movzx eax, byte [rbx + 8]
cmp al, 0x20
je 0x140037643
cmp al, 9
jne 0x1400376a6
lea eax, [rcx - 0x26]
mov dword [rdi + 0x148], eax
movsx ecx, byte [rbx + 9]
lea eax, [rcx - 0x30]
cmp al, 9
ja 0x1400376a6
movsx edx, byte [rbx + 0xa]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x1400376a6
movsx r8d, byte [rbx + 0xb]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x1400376a6
lea ecx, [rcx + rcx*4]
lea ecx, [rdx + rcx*2]
lea ecx, [rcx + rcx*4]
lea ecx, [rcx - 0xa68]
lea ecx, [r8 + rcx*2]
mov dword [rdi + 0x14c], ecx
movzx eax, byte [rbx + 0xc]
cmp al, 0x20
je 0x1400377a0
cmp al, 9
je 0x1400377a0
sub al, 0xa
cmp al, 3
jbe 0x1400377a0
lea rdx, [0x140078c60]
mov rcx, rdi
call fcn.140023120
mov eax, r15d
jmp 0x140037a8d
bt eax, 0x12
jae 0x14003794a
movzx eax, byte [rdx]
mov rbx, rsi
test al, al
je 0x1400376e5
cmp al, 0x20
je 0x1400376da
cmp byte [rbx], 9
jne 0x1400376e5
movzx eax, byte [rbx + 1]
inc rbx
test al, al
jne 0x1400376d1
mov r8d, 5
lea rdx, [0x140078748]
mov rcx, rbx
call sub.api_ms_win_crt_string_l1_1_0.dll_strncmp
test eax, eax
jne 0x14003794a
movzx eax, byte [rbx + 5]
sub al, 0x30
cmp al, 9
ja 0x140037951
cmp byte [rbx + 6], 0x2e
jne 0x140037951
movzx eax, byte [rbx + 7]
sub al, 0x30
cmp al, 9
ja 0x140037951
movzx eax, byte [rbx + 8]
cmp al, 0x20
je 0x140037738
cmp al, 9
jne 0x140037951
movsx ecx, byte [rbx + 9]
lea eax, [rcx - 0x30]
cmp al, 9
ja 0x140037951
movsx edx, byte [rbx + 0xa]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x140037951
movsx r8d, byte [rbx + 0xb]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x140037951
lea ecx, [rcx + rcx*4]
lea ecx, [rdx + rcx*2]
lea ecx, [rcx + rcx*4]
lea ecx, [rcx - 0xa68]
lea ecx, [r8 + rcx*2]
mov dword [rdi + 0x14c], ecx
movzx eax, byte [rbx + 0xc]
cmp al, 0x20
je 0x140037796
cmp al, 9
je 0x140037796
sub al, 0xa
cmp al, 3
ja 0x140037951
mov dword [rdi + 0x148], recvfrom
mov r9d, dword [rdi + 0x148]
mov ecx, r9d
mov rbx, qword [rdi + 0x18]
sub ecx, 0xa
je 0x1400377f0
cmp ecx, r15d
je 0x1400377f0
mov eax, 0x66666667
mov rcx, rdi
imul r9d
mov r8d, edx
lea rdx, [0x1400789a0]
sar r8d, 2
mov eax, r8d
shr eax, 0x1f
add r8d, eax
lea eax, [r8 + r8*4]
add eax, eax
sub r9d, eax
call fcn.140023120
mov eax, r15d
jmp 0x140037a8d
movzx eax, byte [rbx + 0x7e0]
test al, al
je 0x14003783f
mov ecx, eax
mov eax, 0xcccccccd
mul ecx
mov eax, 0x66666667
mov r8d, edx
imul r9d
shr r8d, 3
mov r9d, edx
sar r9d, 2
mov eax, r9d
shr eax, 0x1f
add r9d, eax
cmp r9d, r8d
je 0x14003783f
lea rdx, [0x140078970]
mov rcx, rdi
call fcn.140023120
mov eax, r15d
jmp 0x140037a8d
mov eax, dword [rdi + 0x14c]
mov dword [rdi + 0x1338], eax
mov eax, dword [rdi + 0x148]
mov dword [rdi + 0x1340], eax
movzx eax, byte [rdi + 0x148]
mov byte [rbx + 0x7e0], al
movzx eax, byte [rdi + 0x1319]
test al, al
je 0x140037877
cmp eax, dword [rdi + 0x148]
jle 0x140037884
movzx eax, byte [rdi + 0x148]
mov byte [rdi + 0x1319], al
cmp qword [rdi + 0x1120], r12
je 0x1400378a9
cmp byte [rdi + 0x131a], r12b
jne 0x1400378a9
cmp dword [rdi + 0x14c], 0x1a0
jne 0x1400378a9
mov byte [rdi + 0x1e3], r15b
cmp dword [rdi + 0x148], 0xa
jne 0x1400378cc
lea rdx, [0x1400789d0]
mov rcx, rdi
call fcn.140023210
mov edx, r15d
mov rcx, rbx
call fcn.140026000
mov ecx, dword [rdi + 0x14c]
lea eax, [rcx - 0x64]
cmp eax, 0x63
setbe al
mov byte [rdi + 0x1e4], al
sub ecx, 0xcc
je 0x1400378fe
cmp ecx, 0x64
jne 0x140037913
cmp byte [rdi + 0x538], r12b
je 0x1400378fe
mov byte [rdi + 0x1414], r15b
mov qword [rdi + 0x100], r12
mov qword [rdi + 0x108], r12
mov byte [rdi + 0x1e4], r15b
mov ebx, ntohs
lea r14, [rdi + 0x13c]
mov r8, rbp
xor edx, edx
mov rcx, rsi
call sub.VCRUNTIME140.dll_memchr
test rax, rax
je 0x14003795b
lea rdx, [0x140078a18]
mov rcx, rdi
mov ebx, 8
call fcn.140023120
jmp 0x140037a8b
mov byte [rdi + 0x1d9], r12b
mov eax, 8
jmp 0x140037a8d
mov ecx, dword [r14]
cmp ecx, 2
jl 0x1400379a1
movzx eax, byte [rsi]
cmp al, 0x20
je 0x14003796e
cmp al, 9
jne 0x140037973
cmp ecx, 2
jg 0x1400379a1
mov r8, rbp
mov edx, 0x3a
mov rcx, rsi
call sub.VCRUNTIME140.dll_memchr
test rax, rax
jne 0x1400379a1
lea rdx, [0x140078a30]
mov rcx, rdi
mov ebx, 8
call fcn.140023120
jmp 0x140037a8b
mov r8, rbp
mov rdx, rsi
mov rcx, rdi
call fcn.140034a60
test eax, eax
jne 0x140037a8d
mov r9, rbp
mov r8, rsi
mov edx, r15d
mov rcx, rdi
call fcn.140023030
mov eax, dword [rdi + 0x14c]
sub eax, 0x64
cmp eax, 0x64
jae 0x1400379d9
or ebx, 0x20
mov r9, rbp
mov r8, rsi
mov edx, ebx
mov rcx, rdi
call fcn.140024630
test eax, eax
jne 0x140037a8d
xor r8d, r8d
mov rdx, rbp
mov rcx, rdi
call fcn.140033f60
jmp 0x140037a8d
lea rdx, [r8 + 1]
lea rcx, [rsp + 0x30]
call fcn.140013fe0
mov r8, rbp
lea rcx, [rsp + 0x30]
mov rdx, rsi
call fcn.140013fa0
test eax, eax
jne 0x140037a8d
lea rcx, [rdi + 0xc58]
call fcn.140014020
lea rcx, [rsp + 0x30]
call fcn.140014000
lea rcx, [rsp + 0x30]
mov rbx, rax
call fcn.140014010
mov rcx, qword [rsp + 0x90]
mov rdx, rax
lea rax, [rsp + 0x98]
mov r9, r15
mov qword [rsp + 0x28], rax
mov r8, rbx
mov qword [rsp + 0x20], rcx
mov rcx, rdi
call fcn.140036790
mov rcx, qword [rsp + 0x98]
mov ebx, eax
add qword [r14], rcx
lea rcx, [rsp + 0x30]
call fcn.140013fb0
mov eax, ebx
lea r11, [rsp + 0x50]
mov rbx, qword [r11 + 0x20]
mov rbp, qword [r11 + 0x28]
mov rsi, qword [r11 + 0x30]
mov rdi, qword [r11 + 0x38]
mov rsp, r11
pop r15
pop r14
pop r12
ret