Function at 0x1400c7070
Capabilities:
Validate payment card number using luhn algorithm

Disassembly:
mov qword [rsp + 0x18], r8
mov qword [rsp + 8], rcx
push rbx
push rbp
push rsi
push rdi
push r14
push r15
sub rsp, 0x78
mov rbx, rdx
movaps xmmword [rsp + 0x50], xmm6
mov rdx, rcx
movaps xmmword [rsp + 0x40], xmm7
movaps xmmword [rsp + 0x30], xmm8
xorps xmm6, xmm6
xorps xmm8, xmm8
mov rax, qword [rbx + 0x28]
mov rcx, qword [rbx + 0x38]
sub rcx, qword [rbx + 0x10]
add rcx, rax
cmp byte [rax], 0x2d
mov qword [rsp + 0x20], rcx
jne 0x1400c70d1
mov rcx, rbx
call fcn.1400c5400
mov rdx, qword [rsp + 0xb0]
mov r15b, 1
jmp 0x1400c70d4
xor r15b, r15b
mov rcx, qword [rbx + 0x28]
xor r14d, r14d
movsd xmm7, qword [0x1405a6bf8]
mov esi, r14d
mov qword [rsp + 0x70], r12
mov ebp, r14d
mov byte [rsp + 0xc8], r15b
movsx edi, byte [rcx]
mov qword [rsp + 0x68], r13
mov byte [rsp + 0xb8], sil
cmp dil, 0x30
jne 0x1400c711f
mov rcx, rbx
mov r12d, r14d
call fcn.1400c5400
xor r13b, r13b
jmp 0x1400c7312
lea eax, [rdi - 0x31]
cmp al, 8
ja 0x1400c76bb
mov rcx, rbx
call fcn.1400c5400
mov rcx, qword [rbx + 0x28]
lea r12d, [rdi - 0x30]
movzx edi, byte [rcx]
test r15b, r15b
je 0x1400c7195
cmp dil, 0x30
jl 0x1400c71ec
nop dword [rax]
cmp dil, 0x39
ja 0x1400c71ec
cmp r12d, 0xccccccc
jb 0x1400c716b
jne 0x1400c71e1
cmp dil, 0x38
ja 0x1400c71e1
mov rcx, rbx
call fcn.1400c5400
lea ecx, [r12 - 6]
movzx eax, dil
lea ecx, [r12 + rcx*4]
inc ebp
lea r12d, [rax + rcx*2]
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c7150
jmp 0x1400c71ec
cmp dil, 0x30
jl 0x1400c71ec
nop dword [rax + rax]
cmp dil, 0x39
ja 0x1400c71ec
cmp r12d, 0x19999999
jb 0x1400c71b7
jne 0x1400c71e1
cmp dil, 0x35
ja 0x1400c71e1
mov rcx, rbx
call fcn.1400c5400
lea ecx, [r12 - 6]
movzx eax, dil
lea ecx, [r12 + rcx*4]
inc ebp
lea r12d, [rax + rcx*2]
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c71a0
jmp 0x1400c71ec
mov byte [rsp + 0xb8], 1
mov esi, r12d
xor r13b, r13b
cmp byte [rsp + 0xb8], r13b
je 0x1400c7312
cmp byte [rcx], 0x30
jl 0x1400c7312
movzx edi, byte [rcx]
test r15b, r15b
je 0x1400c7277
movabs r15, 0xccccccccccccccc
nop dword [rax + rax]
cmp dil, 0x39
ja 0x1400c7312
cmp rsi, r15
jb 0x1400c7237
jne 0x1400c7262
cmp dil, 0x38
ja 0x1400c7262
mov rcx, rbx
call fcn.1400c5400
movzx ecx, dil
lea rax, [rsi + rsi*4]
sub ecx, 0x30
inc ebp
lea rsi, [rcx + rax*2]
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c7220
jmp 0x1400c7312
mov rdx, rsi
mov r13b, 1
xorps xmm6, xmm6
test rdx, rdx
js 0x1400c72c3
cvtsi2sd xmm6, rdx
jmp 0x1400c72d8
movabs r15, 0x1999999999999999
mov rdx, rsi
cmp dil, 0x39
ja 0x1400c7312
cmp rsi, r15
jb 0x1400c729b
jne 0x1400c7265
cmp dil, 0x35
ja 0x1400c7265
mov rcx, rbx
call fcn.1400c5400
movzx ecx, dil
lea rax, [rsi + rsi*4]
sub ecx, 0x30
inc ebp
lea rsi, [rcx + rax*2]
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c7281
jmp 0x1400c7312
mov rax, rdx
and edx, 1
shr rax, 1
or rax, rdx
cvtsi2sd xmm6, rax
addsd xmm6, xmm6
cmp byte [rcx], 0x30
jl 0x1400c7312
movzx edi, byte [rcx]
cmp dil, 0x39
ja 0x1400c7312
mov rcx, rbx
call fcn.1400c5400
movzx eax, dil
sub eax, 0x30
mulsd xmm6, xmm7
movd xmm0, eax
mov rax, qword [rbx + 0x28]
cvtdq2pd xmm0, xmm0
movzx edi, byte [rax]
addsd xmm6, xmm0
cmp dil, 0x30
jge 0x1400c72e0
mov rdx, qword [rbx + 0x28]
mov r15d, r14d
cmp byte [rdx], 0x2e
jne 0x1400c73dc
mov rcx, rbx
call fcn.1400c5400
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
lea eax, [rdi - 0x30]
cmp al, 9
ja 0x1400c746c
test r13b, r13b
jne 0x1400c741e
cmp byte [rsp + 0xb8], r14b
jne 0x1400c7352
mov esi, r12d
mov rax, rcx
movabs r13, 0x1fffffffffffff
nop
mov r8, rcx
mov rdx, rax
cmp dil, 0x39
ja 0x1400c73a8
cmp rsi, r13
ja 0x1400c73a8
mov rcx, rbx
call fcn.1400c5400
movzx ecx, dil
lea rax, [rsi + rsi*4]
sub ecx, 0x30
dec r15d
lea rsi, [rcx + rax*2]
test rsi, rsi
je 0x1400c7392
inc ebp
mov rcx, qword [rbx + 0x28]
mov rax, rcx
mov r8, rcx
mov rdx, rcx
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c7360
xorps xmm6, xmm6
test rsi, rsi
js 0x1400c73b7
cvtsi2sd xmm6, rsi
jmp 0x1400c73cf
mov rax, rsi
mov rcx, rsi
shr rcx, 1
and eax, 1
or rcx, rax
cvtsi2sd xmm6, rcx
addsd xmm6, xmm6
movzx edi, byte [r8]
mov r13b, 1
cmp dil, 0x30
jge 0x1400c7421
movzx eax, byte [rdx]
cmp al, 0x65
je 0x1400c73eb
cmp al, 0x45
jne 0x1400c757c
mov rcx, rbx
call fcn.1400c5400
test r13b, r13b
jne 0x1400c74a7
mov rcx, rsi
cmp byte [rsp + 0xb8], r14b
jne 0x1400c740c
mov ecx, r12d
xorps xmm6, xmm6
test rcx, rcx
js 0x1400c748f
cvtsi2sd xmm6, rcx
jmp 0x1400c74a4
mov rdx, rcx
cmp dil, 0x39
ja 0x1400c73dc
mov rcx, rbx
call fcn.1400c5400
cmp ebp, 0x11
jge 0x1400c745a
mulsd xmm6, xmm7
dec r15d
movzx eax, dil
sub eax, 0x30
movd xmm0, eax
cvtdq2pd xmm0, xmm0
addsd xmm0, xmm6
comisd xmm0, xmm8
movaps xmm6, xmm0
jbe 0x1400c745a
inc ebp
mov rdx, qword [rbx + 0x28]
movzx edi, byte [rdx]
cmp dil, 0x30
jge 0x1400c7421
jmp 0x1400c73dc
mov rax, qword [rbx + 0x38]
sub rax, qword [rbx + 0x10]
add rax, rcx
mov rcx, qword [rsp + 0xb0]
mov dword [rcx + 0x30], ntohs
mov qword [rcx + 0x38], rax
jmp 0x1400c76d1
mov rax, rcx
and ecx, 1
shr rax, 1
or rax, rcx
cvtsi2sd xmm6, rax
addsd xmm6, xmm6
mov r13b, 1
mov rcx, qword [rbx + 0x28]
xor bpl, bpl
movzx edi, byte [rcx]
cmp dil, 0x2b
jne 0x1400c74c1
mov rcx, rbx
call fcn.1400c5400
jmp 0x1400c74d2
cmp dil, 0x2d
jne 0x1400c74d9
mov rcx, rbx
call fcn.1400c5400
mov bpl, 1
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
lea eax, [rdi - 0x30]
cmp al, 9
ja 0x1400c7605
mov rcx, rbx
call fcn.1400c5400
mov rax, qword [rbx + 0x28]
movsx r14d, dil
sub r14d, 0x30
movzx edi, byte [rax]
test bpl, bpl
je 0x1400c75bc
lea ecx, [r15 + 0x7ffffff7]
mov eax, 0x66666667
imul ecx
mov ebp, edx
sar ebp, 2
mov eax, ebp
shr eax, 0x1f
add ebp, eax
cmp dil, 0x30
jl 0x1400c7579
cmp dil, 0x39
ja 0x1400c7579
mov rcx, rbx
call fcn.1400c5400
lea r14d, [r14 + r14*4]
movzx eax, dil
lea r14d, [r14 - 0x18]
lea r14d, [rax + r14*2]
cmp r14d, ebp
jle 0x1400c756c
mov rax, qword [rbx + 0x28]
movzx ecx, byte [rax]
cmp cl, 0x30
jl 0x1400c756c
cmp cl, 0x39
ja 0x1400c756c
mov rcx, rbx
call fcn.1400c5400
mov rax, qword [rbx + 0x28]
movzx ecx, byte [rax]
cmp cl, 0x30
jge 0x1400c7553
mov rax, qword [rbx + 0x28]
movzx edi, byte [rax]
cmp dil, 0x30
jge 0x1400c7524
neg r14d
test r13b, r13b
je 0x1400c764b
lea edx, [r14 + r15]
movaps xmm0, xmm6
call fcn.140021940
comisd xmm0, xmmword [0x1405a6c78]
jbe 0x1400c7628
mov rcx, qword [rsp + 0xb0]
mov rax, qword [rsp + 0x20]
mov dword [rcx + 0x30], reloc.WS2_32.dll_listen
mov qword [rcx + 0x38], rax
jmp 0x1400c76d1
mov ebp, 0x134
sub ebp, r15d
cmp dil, 0x30
jl 0x1400c757c
nop word [rax + rax]
cmp dil, 0x39
ja 0x1400c757c
mov rcx, rbx
call fcn.1400c5400
lea r14d, [r14 + r14*4]
movzx eax, dil
lea r14d, [r14 - 0x18]
lea r14d, [rax + r14*2]
cmp r14d, ebp
jg 0x1400c759f
mov rax, qword [rbx + 0x28]
movzx edi, byte [rax]
cmp dil, 0x30
jge 0x1400c75d0
jmp 0x1400c757c
mov rax, qword [rbx + 0x38]
sub rax, qword [rbx + 0x10]
add rax, rcx
mov rcx, qword [rsp + 0xb0]
mov dword [rcx + 0x30], reloc.WS2_32.dll_ntohs
mov qword [rcx + 0x38], rax
jmp 0x1400c76d1
cmp byte [rsp + 0xc8], 0
je 0x1400c7639
xorps xmm0, xmmword [0x1405a7160]
mov rcx, qword [rsp + 0xc0]
movaps xmm1, xmm0
call fcn.1400251b0
jmp 0x1400c769d
cmp byte [rsp + 0xb8], 0
mov rcx, qword [rsp + 0xc0]
je 0x1400c767e
cmp byte [rsp + 0xc8], 0
je 0x1400c7674
neg rsi
mov rdx, rsi
call fcn.1400252a0
jmp 0x1400c769d
mov rdx, rsi
call fcn.140025210
jmp 0x1400c769d
cmp byte [rsp + 0xc8], 0
je 0x1400c7695
neg r12d
mov edx, r12d
call fcn.1400253b0
jmp 0x1400c769d
mov edx, r12d
call fcn.140025350
test al, al
jne 0x1400c76d1
mov rcx, qword [rsp + 0xb0]
mov rax, qword [rsp + 0x20]
mov dword [rcx + 0x30], reloc.WS2_32.dll_recv
mov qword [rcx + 0x38], rax
jmp 0x1400c76d1
mov rax, qword [rbx + 0x38]
sub rax, qword [rbx + 0x10]
add rax, rcx
mov dword [rdx + 0x30], 3
mov qword [rdx + 0x38], rax
mov r13, qword [rsp + 0x68]
mov r12, qword [rsp + 0x70]
movaps xmm6, xmmword [rsp + 0x50]
movaps xmm7, xmmword [rsp + 0x40]
movaps xmm8, xmmword [rsp + 0x30]
add rsp, 0x78
pop r15
pop r14
pop rdi
pop rsi
pop rbp
pop rbx
ret