Function at 0x1800ffb80
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 0x1801000fb
cmp al, 0xd
je 0x1801000fb
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 0x180100016
mov dword [rdi + 0x148], r12d
mov rax, qword [rdi + 0x18]
mov rcx, qword [rax + 0x3d8]
mov eax, dword [rcx + 0x8c]
test al, 3
je 0x1800ffdae
movzx eax, byte [rdx]
mov rbx, rdx
test al, al
je 0x1800ffc2c
cmp al, 0x20
je 0x1800ffc21
cmp byte [rbx], 9
jne 0x1800ffc2c
movzx eax, byte [rbx + 1]
inc rbx
test al, al
jne 0x1800ffc18
mov r8d, 5
lea rdx, str.HTTP_
mov rcx, rbx
call qword [sym.imp.api_ms_win_crt_string_l1_1_0.dll_strncmp]
test eax, eax
jne 0x1800ffce6
movsx edx, byte [rbx + 5]
mov ecx, edx
sub ecx, 0x31
je 0x1800ffd16
sub ecx, r15d
je 0x1800ffc7a
cmp ecx, r15d
je 0x1800ffc7a
lea rdx, str.Unsupported_HTTP_version_in_response
mov rcx, rdi
call fcn.1800f2930
mov eax, r15d
jmp 0x180100184
movzx eax, byte [rbx + 6]
cmp al, 0x20
je 0x1800ffc86
cmp al, 9
jne 0x1800ffce6
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 0x1800ffce6
movsx edx, byte [rbx + 8]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x1800ffce6
movsx r8d, byte [rbx + 9]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x1800ffce6
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 0x1800ffe92
sub al, 9
cmp al, 4
jbe 0x1800ffe92
mov r8, rbp
mov rdx, rsi
mov rcx, rdi
call fcn.1800fee50
cmp eax, r15d
jne 0x180100041
mov dword [rdi + 0x14c], 0xc8
mov dword [rdi + 0x148], 0xa
jmp 0x1800ffe92
cmp byte [rbx + 6], 0x2e
jne 0x1800ffd97
movsx ecx, byte [rbx + 7]
lea eax, [rcx - 0x30]
cmp al, r15b
ja 0x1800ffd97
movzx eax, byte [rbx + 8]
cmp al, 0x20
je 0x1800ffd34
cmp al, 9
jne 0x1800ffd97
lea eax, [rcx - 0x26]
mov dword [rdi + 0x148], eax
movsx ecx, byte [rbx + 9]
lea eax, [rcx - 0x30]
cmp al, 9
ja 0x1800ffd97
movsx edx, byte [rbx + 0xa]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x1800ffd97
movsx r8d, byte [rbx + 0xb]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x1800ffd97
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 0x1800ffe92
cmp al, 9
je 0x1800ffe92
sub al, 0xa
cmp al, 3
jbe 0x1800ffe92
lea rdx, str.Unsupported_HTTP_1_subversion_in_response
mov rcx, rdi
call fcn.1800f2930
mov eax, r15d
jmp 0x180100184
bt eax, 0x12
jae 0x180100041
movzx eax, byte [rdx]
mov rbx, rsi
test al, al
je 0x1800ffdd6
cmp al, 0x20
je 0x1800ffdcb
cmp byte [rbx], 9
jne 0x1800ffdd6
movzx eax, byte [rbx + 1]
inc rbx
test al, al
jne 0x1800ffdc2
mov r8d, 5
lea rdx, str.RTSP_
mov rcx, rbx
call qword [sym.imp.api_ms_win_crt_string_l1_1_0.dll_strncmp]
test eax, eax
jne 0x180100041
movzx eax, byte [rbx + 5]
sub al, 0x30
cmp al, 9
ja 0x180100048
cmp byte [rbx + 6], 0x2e
jne 0x180100048
movzx eax, byte [rbx + 7]
sub al, 0x30
cmp al, 9
ja 0x180100048
movzx eax, byte [rbx + 8]
cmp al, 0x20
je 0x1800ffe2a
cmp al, 9
jne 0x180100048
movsx ecx, byte [rbx + 9]
lea eax, [rcx - 0x30]
cmp al, 9
ja 0x180100048
movsx edx, byte [rbx + 0xa]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x180100048
movsx r8d, byte [rbx + 0xb]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x180100048
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 0x1800ffe88
cmp al, 9
je 0x1800ffe88
sub al, 0xa
cmp al, 3
ja 0x180100048
mov dword [rdi + 0x148], 0xb
mov r9d, dword [rdi + 0x148]
mov ecx, r9d
mov rbx, qword [rdi + 0x18]
sub ecx, 0xa
je 0x1800ffee7
sub ecx, r15d
je 0x1800ffee7
cmp ecx, 9
je 0x1800ffee7
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.1800f2930
mov eax, r15d
jmp 0x180100184
movzx eax, byte [rbx + 0x5d8]
test al, al
je 0x1800fff36
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 0x1800fff36
lea rdx, str.Version_mismatch__from_HTTP__u_to_HTTP__u_
mov rcx, rdi
call fcn.1800f2930
mov eax, r15d
jmp 0x180100184
mov eax, dword [rdi + 0x14c]
mov dword [rdi + 0x1270], eax
mov eax, dword [rdi + 0x148]
mov dword [rdi + 0x1278], eax
movzx eax, byte [rdi + 0x148]
mov byte [rbx + 0x5d8], al
movzx eax, byte [rdi + 0x1259]
test al, al
je 0x1800fff6e
cmp eax, dword [rdi + 0x148]
jle 0x1800fff7b
movzx eax, byte [rdi + 0x148]
mov byte [rdi + 0x1259], al
cmp qword [rdi + 0x1080], r12
je 0x1800fffa0
cmp byte [rdi + 0x125a], r12b
jne 0x1800fffa0
cmp dword [rdi + 0x14c], 0x1a0
jne 0x1800fffa0
mov byte [rdi + 0x1e3], r15b
cmp dword [rdi + 0x148], 0xa
jne 0x1800fffc3
lea rdx, str.HTTP_1.0__assume_close_after_body
mov rcx, rdi
call fcn.1800f2a20
mov edx, r15d
mov rcx, rbx
call fcn.1800f57c0
mov ecx, dword [rdi + 0x14c]
lea eax, [rcx - 0x64]
cmp eax, 0x63
setbe al
mov byte [rdi + 0x1e4], al
sub ecx, 0xcc
je 0x1800ffff5
cmp ecx, 0x64
jne 0x18010000a
cmp byte [rdi + 0x530], r12b
je 0x1800ffff5
mov byte [rdi + 0x134c], r15b
mov qword [rdi + 0x100], r12
mov qword [rdi + 0x108], r12
mov byte [rdi + 0x1e4], r15b
mov ebx, 0xc
lea r14, [rdi + 0x13c]
mov r8, rbp
xor edx, edx
mov rcx, rsi
call sub.VCRUNTIME140.dll_memchr
test rax, rax
je 0x180100052
lea rdx, str.Nul_byte_in_header
mov rcx, rdi
mov ebx, 8
call fcn.1800f2930
jmp 0x180100182
mov byte [rdi + 0x1d9], r12b
mov eax, 8
jmp 0x180100184
mov ecx, dword [r14]
cmp ecx, 2
jl 0x180100098
movzx eax, byte [rsi]
cmp al, 0x20
je 0x180100065
cmp al, 9
jne 0x18010006a
cmp ecx, 2
jg 0x180100098
mov r8, rbp
mov edx, 0x3a
mov rcx, rsi
call sub.VCRUNTIME140.dll_memchr
test rax, rax
jne 0x180100098
lea rdx, str.Header_without_colon
mov rcx, rdi
mov ebx, 8
call fcn.1800f2930
jmp 0x180100182
mov r8, rbp
mov rdx, rsi
mov rcx, rdi
call fcn.1800fcce0
test eax, eax
jne 0x180100184
mov r9, rbp
mov r8, rsi
mov edx, r15d
mov rcx, rdi
call fcn.1800f2840
mov eax, dword [rdi + 0x14c]
sub eax, 0x64
cmp eax, 0x64
jae 0x1801000d0
or ebx, 0x20
mov r9, rbp
mov r8, rsi
mov edx, ebx
mov rcx, rdi
call fcn.1800f3d80
test eax, eax
jne 0x180100184
xor r8d, r8d
mov rdx, rbp
mov rcx, rdi
call fcn.1800fc180
jmp 0x180100184
lea rdx, [r8 + 1]
lea rcx, [rsp + 0x30]
call fcn.1800ecab0
mov r8, rbp
lea rcx, [rsp + 0x30]
mov rdx, rsi
call fcn.1800eca70
test eax, eax
jne 0x180100184
lea rcx, [rdi + 0xbb8]
call fcn.1800ecae0
lea rcx, [rsp + 0x30]
call fcn.1800ecad0
lea rcx, [rsp + 0x30]
mov rbx, rax
call fcn.180030430
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.1800fef20
mov rcx, qword [rsp + 0x98]
mov ebx, eax
add qword [r14], rcx
lea rcx, [rsp + 0x30]
call fcn.1800eca80
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