Function at 0x1400844f0
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 0x140084a64
cmp al, 0xd
je 0x140084a64
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 0x14008497f
mov dword [rdi + 0x148], r12d
mov rax, qword [rdi + 0x18]
mov rcx, qword [rax + 0x3e0]
mov eax, dword [rcx + 0x8c]
test al, 3
je 0x14008471d
movzx eax, byte [rdx]
mov rbx, rdx
test al, al
je 0x14008459c
cmp al, 0x20
je 0x140084591
cmp byte [rbx], 9
jne 0x14008459c
movzx eax, byte [rbx + 1]
inc rbx
test al, al
jne 0x140084588
mov r8d, 5
lea rdx, str.HTTP_
mov rcx, rbx
call sub.api_ms_win_crt_string_l1_1_0.dll_strncmp
test eax, eax
jne 0x140084655
movsx edx, byte [rbx + 5]
mov ecx, edx
sub ecx, 0x31
je 0x140084685
sub ecx, r15d
je 0x1400845e9
cmp ecx, r15d
je 0x1400845e9
lea rdx, str.Unsupported_HTTP_version_in_response
mov rcx, rdi
call fcn.140071880
mov eax, r15d
jmp 0x140084aed
movzx eax, byte [rbx + 6]
cmp al, 0x20
je 0x1400845f5
cmp al, 9
jne 0x140084655
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 0x140084655
movsx edx, byte [rbx + 8]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x140084655
movsx r8d, byte [rbx + 9]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x140084655
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 0x140084800
sub al, 9
cmp al, 4
jbe 0x140084800
mov r8, rbp
mov rdx, rsi
mov rcx, rdi
call fcn.1400836b0
cmp eax, r15d
jne 0x1400849aa
mov dword [rdi + 0x14c], 0xc8
mov dword [rdi + 0x148], 0xa
jmp 0x140084800
cmp byte [rbx + 6], 0x2e
jne 0x140084706
movsx ecx, byte [rbx + 7]
lea eax, [rcx - 0x30]
cmp al, r15b
ja 0x140084706
movzx eax, byte [rbx + 8]
cmp al, 0x20
je 0x1400846a3
cmp al, 9
jne 0x140084706
lea eax, [rcx - 0x26]
mov dword [rdi + 0x148], eax
movsx ecx, byte [rbx + 9]
lea eax, [rcx - 0x30]
cmp al, 9
ja 0x140084706
movsx edx, byte [rbx + 0xa]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x140084706
movsx r8d, byte [rbx + 0xb]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x140084706
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 0x140084800
cmp al, 9
je 0x140084800
sub al, 0xa
cmp al, 3
jbe 0x140084800
lea rdx, str.Unsupported_HTTP_1_subversion_in_response
mov rcx, rdi
call fcn.140071880
mov eax, r15d
jmp 0x140084aed
bt eax, 0x12
jae 0x1400849aa
movzx eax, byte [rdx]
mov rbx, rsi
test al, al
je 0x140084745
cmp al, 0x20
je 0x14008473a
cmp byte [rbx], 9
jne 0x140084745
movzx eax, byte [rbx + 1]
inc rbx
test al, al
jne 0x140084731
mov r8d, 5
lea rdx, str.RTSP_
mov rcx, rbx
call sub.api_ms_win_crt_string_l1_1_0.dll_strncmp
test eax, eax
jne 0x1400849aa
movzx eax, byte [rbx + 5]
sub al, 0x30
cmp al, 9
ja 0x1400849b1
cmp byte [rbx + 6], 0x2e
jne 0x1400849b1
movzx eax, byte [rbx + 7]
sub al, 0x30
cmp al, 9
ja 0x1400849b1
movzx eax, byte [rbx + 8]
cmp al, 0x20
je 0x140084798
cmp al, 9
jne 0x1400849b1
movsx ecx, byte [rbx + 9]
lea eax, [rcx - 0x30]
cmp al, 9
ja 0x1400849b1
movsx edx, byte [rbx + 0xa]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x1400849b1
movsx r8d, byte [rbx + 0xb]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x1400849b1
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 0x1400847f6
cmp al, 9
je 0x1400847f6
sub al, 0xa
cmp al, 3
ja 0x1400849b1
mov dword [rdi + 0x148], listen
mov r9d, dword [rdi + 0x148]
mov ecx, r9d
mov rbx, qword [rdi + 0x18]
sub ecx, 0xa
je 0x140084850
cmp ecx, r15d
je 0x140084850
mov eax, 0x66666667
mov rcx, rdi
imul r9d
mov r8d, edx
lea rdx, str.Unsupported_HTTP_version___u._d__in_response
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.140071880
mov eax, r15d
jmp 0x140084aed
movzx eax, byte [rbx + 0x7e0]
test al, al
je 0x14008489f
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 0x14008489f
lea rdx, str.Version_mismatch__from_HTTP__u_to_HTTP__u_
mov rcx, rdi
call fcn.140071880
mov eax, r15d
jmp 0x140084aed
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 0x1400848d7
cmp eax, dword [rdi + 0x148]
jle 0x1400848e4
movzx eax, byte [rdi + 0x148]
mov byte [rdi + 0x1319], al
cmp qword [rdi + 0x1120], r12
je 0x140084909
cmp byte [rdi + 0x131a], r12b
jne 0x140084909
cmp dword [rdi + 0x14c], 0x1a0
jne 0x140084909
mov byte [rdi + 0x1e3], r15b
cmp dword [rdi + 0x148], 0xa
jne 0x14008492c
lea rdx, str.HTTP_1.0__assume_close_after_body
mov rcx, rdi
call fcn.140071970
mov edx, r15d
mov rcx, rbx
call fcn.140074760
mov ecx, dword [rdi + 0x14c]
lea eax, [rcx - 0x64]
cmp eax, 0x63
setbe al
mov byte [rdi + 0x1e4], al
sub ecx, 0xcc
je 0x14008495e
cmp ecx, 0x64
jne 0x140084973
cmp byte [rdi + 0x538], r12b
je 0x14008495e
mov byte [rdi + 0x1414], r15b
mov qword [rdi + 0x100], r12
mov qword [rdi + 0x108], r12
mov byte [rdi + 0x1e4], r15b
mov ebx, listen
lea r14, [rdi + 0x13c]
mov r8, rbp
xor edx, edx
mov rcx, rsi
call sub.VCRUNTIME140.dll_memchr
test rax, rax
je 0x1400849bb
lea rdx, str.Nul_byte_in_header
mov rcx, rdi
mov ebx, 8
call fcn.140071880
jmp 0x140084aeb
mov byte [rdi + 0x1d9], r12b
mov eax, 8
jmp 0x140084aed
mov ecx, dword [r14]
cmp ecx, 2
jl 0x140084a01
movzx eax, byte [rsi]
cmp al, 0x20
je 0x1400849ce
cmp al, 9
jne 0x1400849d3
cmp ecx, 2
jg 0x140084a01
mov r8, rbp
mov edx, 0x3a
mov rcx, rsi
call sub.VCRUNTIME140.dll_memchr
test rax, rax
jne 0x140084a01
lea rdx, str.Header_without_colon
mov rcx, rdi
mov ebx, 8
call fcn.140071880
jmp 0x140084aeb
mov r8, rbp
mov rdx, rsi
mov rcx, rdi
call fcn.140081ac0
test eax, eax
jne 0x140084aed
mov r9, rbp
mov r8, rsi
mov edx, r15d
mov rcx, rdi
call fcn.140071790
mov eax, dword [rdi + 0x14c]
sub eax, 0x64
cmp eax, 0x64
jae 0x140084a39
or ebx, 0x20
mov r9, rbp
mov r8, rsi
mov edx, ebx
mov rcx, rdi
call fcn.140072d90
test eax, eax
jne 0x140084aed
xor r8d, r8d
mov rdx, rbp
mov rcx, rdi
call fcn.140080fc0
jmp 0x140084aed
lea rdx, [r8 + 1]
lea rcx, [rsp + 0x30]
call fcn.140062760
mov r8, rbp
lea rcx, [rsp + 0x30]
mov rdx, rsi
call fcn.140062720
test eax, eax
jne 0x140084aed
lea rcx, [rdi + 0xc58]
call fcn.1400627a0
lea rcx, [rsp + 0x30]
call fcn.140062780
lea rcx, [rsp + 0x30]
mov rbx, rax
call fcn.140062790
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.1400837f0
mov rcx, qword [rsp + 0x98]
mov ebx, eax
add qword [r14], rcx
lea rcx, [rsp + 0x30]
call fcn.140062730
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