Function at 0x1400c15a0
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 r13
push r15
sub rsp, 0x88
movaps xmmword [rsp + 0x60], xmm6
mov rbx, rdx
mov rdx, qword [rdx + 0x28]
xorps xmm6, xmm6
movaps xmmword [rsp + 0x50], xmm7
movaps xmmword [rsp + 0x40], xmm8
mov rax, qword [rbx + 0x38]
sub rax, qword [rbx + 0x10]
movzx edi, byte [rdx]
add rax, rdx
movaps xmmword [rsp + 0x30], xmm9
xorps xmm9, xmm9
mov qword [rsp + 0x20], rax
cmp dil, 0x2d
jne 0x1400c1612
mov rcx, rbx
call fcn.1400bf510
mov rdx, qword [rbx + 0x28]
mov r13b, 1
mov rcx, qword [rsp + 0xc0]
movzx edi, byte [rdx]
jmp 0x1400c1615
xor r13b, r13b
movsd xmm7, qword [0x1404d5d08]
xor ebp, ebp
movsd xmm8, qword [0x1404d5d70]
mov esi, ebp
mov qword [rsp + 0x80], r12
mov r15d, ebp
mov byte [rsp + 0xc8], sil
mov byte [rsp + 0xd8], r13b
mov qword [rsp + 0x78], r14
cmp dil, 0x30
jne 0x1400c1667
mov rcx, rbx
mov r14d, ebp
call fcn.1400bf510
mov rcx, qword [rbx + 0x28]
xor r12b, r12b
jmp 0x1400c1862
lea eax, [rdi - 0x31]
cmp al, 8
ja 0x1400c1bc9
mov rcx, rbx
call fcn.1400bf510
mov rax, qword [rbx + 0x28]
movsx r14d, dil
sub r14d, 0x30
movzx edi, byte [rax]
test r13b, r13b
je 0x1400c16e5
cmp dil, 0x30
jl 0x1400c173c
nop dword [rax + rax]
cmp dil, 0x39
jg 0x1400c173c
cmp r14d, 0xccccccc
jb 0x1400c16bb
jne 0x1400c1731
cmp dil, 0x38
jg 0x1400c1731
mov rcx, rbx
call fcn.1400bf510
mov rax, qword [rbx + 0x28]
lea ecx, [r14 + r14*4]
movsx r14d, dil
inc r15d
add r14d, 0xffffffd0
movzx edi, byte [rax]
lea r14d, [r14 + rcx*2]
cmp dil, 0x30
jge 0x1400c16a0
jmp 0x1400c173c
cmp dil, 0x30
jl 0x1400c173c
nop dword [rax + rax]
cmp dil, 0x39
jg 0x1400c173c
cmp r14d, 0x19999999
jb 0x1400c1707
jne 0x1400c1731
cmp dil, 0x35
jg 0x1400c1731
mov rcx, rbx
call fcn.1400bf510
mov rax, qword [rbx + 0x28]
lea ecx, [r14 + r14*4]
movsx r14d, dil
inc r15d
add r14d, 0xffffffd0
movzx edi, byte [rax]
lea r14d, [r14 + rcx*2]
cmp dil, 0x30
jge 0x1400c16f0
jmp 0x1400c173c
mov byte [rsp + 0xc8], 1
mov esi, r14d
xor r12b, r12b
mov rdx, rax
cmp byte [rsp + 0xc8], bpl
je 0x1400c1817
movzx ecx, byte [rax]
test r13b, r13b
je 0x1400c17b4
cmp cl, 0x30
jl 0x1400c1817
movzx edi, cl
movabs r13, 0xccccccccccccccc
nop
cmp dil, 0x39
jg 0x1400c1817
cmp rsi, r13
jb 0x1400c178b
jne 0x1400c1802
cmp dil, 0x38
jg 0x1400c1802
mov rcx, rbx
call fcn.1400bf510
mov rdx, qword [rbx + 0x28]
lea rax, [rsi + rsi*4]
movsx ecx, dil
inc r15d
sub ecx, 0x30
movzx edi, byte [rdx]
lea rsi, [rcx + rax*2]
cmp dil, 0x30
jge 0x1400c1770
jmp 0x1400c1817
cmp cl, 0x30
jl 0x1400c1817
movzx edi, byte [rax]
movabs r13, 0x1999999999999999
cmp dil, 0x39
jg 0x1400c1817
cmp rsi, r13
jb 0x1400c17d9
jne 0x1400c1802
cmp dil, 0x35
jg 0x1400c1802
mov rcx, rbx
call fcn.1400bf510
mov rdx, qword [rbx + 0x28]
lea rax, [rsi + rsi*4]
movsx ecx, dil
inc r15d
sub ecx, 0x30
movzx edi, byte [rdx]
lea rsi, [rcx + rax*2]
cmp dil, 0x30
jge 0x1400c17c6
jmp 0x1400c1817
xorps xmm6, xmm6
cvtsi2sd xmm6, rsi
test rsi, rsi
jns 0x1400c1814
addsd xmm6, xmm8
mov r12b, 1
mov rcx, rdx
test r12b, r12b
je 0x1400c1862
cmp byte [rdx], 0x30
jl 0x1400c1862
movzx edi, byte [rdx]
mov rcx, rdx
cmp dil, 0x39
jg 0x1400c1862
mov rcx, rbx
call fcn.1400bf510
mov rcx, qword [rbx + 0x28]
movsx eax, dil
mov rdx, rcx
sub eax, 0x30
mulsd xmm6, xmm7
movzx edi, byte [rcx]
movd xmm0, eax
cvtdq2pd xmm0, xmm0
addsd xmm0, xmm6
movaps xmm6, xmm0
cmp dil, 0x30
jge 0x1400c1827
cmp byte [rcx], 0x2e
mov r13d, ebp
jne 0x1400c197e
mov rcx, rbx
call fcn.1400bf510
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
lea eax, [rdi - 0x30]
cmp al, 9
jbe 0x1400c18a3
mov rax, qword [rbx + 0x38]
sub rax, qword [rbx + 0x10]
add rax, rcx
mov rcx, qword [rsp + 0xc0]
mov dword [rcx + 0x30], recv
jmp 0x1400c1bdb
test r12b, r12b
jne 0x1400c1926
cmp byte [rsp + 0xc8], bpl
movabs r12, 0x1fffffffffffff
mov eax, r14d
cmovne rax, rsi
mov rsi, rax
mov rdx, rcx
cmp dil, 0x39
jg 0x1400c190a
cmp rsi, r12
ja 0x1400c190a
mov rcx, rbx
call fcn.1400bf510
movsx ecx, dil
lea rax, [rsi + rsi*4]
sub ecx, 0x30
dec r13d
lea rsi, [rcx + rax*2]
mov rcx, qword [rbx + 0x28]
test rsi, rsi
lea eax, [r15 + 1]
mov rdx, rcx
cmove eax, r15d
movzx edi, byte [rcx]
mov r15d, eax
cmp dil, 0x30
jge 0x1400c18c4
xorps xmm6, xmm6
cvtsi2sd xmm6, rsi
test rsi, rsi
jns 0x1400c191c
addsd xmm6, xmm8
movzx edi, byte [rdx]
mov r12b, 1
mov rcx, qword [rbx + 0x28]
cmp dil, 0x30
jl 0x1400c197e
nop dword [rax]
cmp dil, 0x39
jg 0x1400c197e
cmp r15d, 0x11
jge 0x1400c1969
mulsd xmm6, xmm7
dec r13d
movsx eax, dil
sub eax, 0x30
movd xmm0, eax
lea eax, [r15 + 1]
cvtdq2pd xmm0, xmm0
addsd xmm0, xmm6
comisd xmm0, xmm9
movaps xmm6, xmm0
cmovbe eax, r15d
mov r15d, eax
mov rcx, rbx
call fcn.1400bf510
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c1930
movzx eax, byte [rcx]
sub al, 0x45
test al, 0xdf
jne 0x1400c1a9a
mov rcx, rbx
call fcn.1400bf510
test r12b, r12b
jne 0x1400c19bf
cmp byte [rsp + 0xc8], bpl
mov rcx, rsi
mov eax, r14d
xorps xmm6, xmm6
cmove rcx, rax
cvtsi2sd xmm6, rcx
test rcx, rcx
jns 0x1400c19bc
addsd xmm6, xmm8
mov r12b, 1
mov rcx, qword [rbx + 0x28]
xor r15b, r15b
movzx edi, byte [rcx]
cmp dil, 0x2b
jne 0x1400c19d9
mov rcx, rbx
call fcn.1400bf510
jmp 0x1400c19ea
cmp dil, 0x2d
jne 0x1400c19f1
mov rcx, rbx
call fcn.1400bf510
mov r15b, 1
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
lea eax, [rdi - 0x30]
cmp al, 9
ja 0x1400c1b3c
mov rcx, rbx
call fcn.1400bf510
mov rax, qword [rbx + 0x28]
movsx ebp, dil
sub ebp, 0x30
movzx edi, byte [rax]
test r15b, r15b
je 0x1400c1ae0
lea ecx, [r13 + 0x7ffffff7]
mov eax, 0x66666667
imul ecx
mov r15d, edx
sar r15d, 2
mov eax, r15d
shr eax, 0x1f
add r15d, eax
cmp dil, 0x30
jl 0x1400c1a98
nop
cmp dil, 0x39
jg 0x1400c1a98
mov rcx, rbx
call fcn.1400bf510
lea ecx, [rbp*4]
movsx eax, dil
add ecx, ebp
lea ebp, [rcx - 0x18]
lea ebp, [rax + rbp*2]
cmp ebp, r15d
jle 0x1400c1a8b
mov rax, qword [rbx + 0x28]
movzx ecx, byte [rax]
cmp cl, 0x30
jl 0x1400c1a8b
cmp cl, 0x39
jg 0x1400c1a8b
mov rcx, rbx
call fcn.1400bf510
mov rax, qword [rbx + 0x28]
movzx ecx, byte [rax]
cmp cl, 0x30
jge 0x1400c1a72
mov rax, qword [rbx + 0x28]
movzx edi, byte [rax]
cmp dil, 0x30
jge 0x1400c1a40
neg ebp
test r12b, r12b
je 0x1400c1b5b
mov edx, ebp
movaps xmm0, xmm6
add edx, r13d
call fcn.1400226b0
comisd xmm0, xmmword [0x1404d5d88]
ja 0x1400c1b23
cmp byte [rsp + 0xd8], 0
je 0x1400c1acb
xorps xmm0, xmmword [0x1404d5fd0]
mov rcx, qword [rsp + 0xd0]
movaps xmm1, xmm0
call fcn.1400268a0
jmp 0x1400c1baf
mov r15d, 0x134
sub r15d, r13d
cmp dil, 0x30
jl 0x1400c1a9a
nop
cmp dil, 0x39
jg 0x1400c1a9a
mov rcx, rbx
call fcn.1400bf510
lea ebp, [rbp + rbp*4]
movsx eax, dil
lea ebp, [rbp - 0x18]
lea ebp, [rax + rbp*2]
cmp ebp, r15d
jg 0x1400c1b23
mov rax, qword [rbx + 0x28]
movzx edi, byte [rax]
cmp dil, 0x30
jge 0x1400c1af0
jmp 0x1400c1a9a
mov rcx, qword [rsp + 0xc0]
mov rax, qword [rsp + 0x20]
mov dword [rcx + 0x30], reloc.WS2_32.dll_listen
jmp 0x1400c1bdb
mov rax, qword [rbx + 0x38]
sub rax, qword [rbx + 0x10]
add rax, rcx
mov rcx, qword [rsp + 0xc0]
mov dword [rcx + 0x30], reloc.WS2_32.dll_ntohs
jmp 0x1400c1bdb
cmp byte [rsp + 0xc8], 0
mov rcx, qword [rsp + 0xd0]
je 0x1400c1b8f
cmp byte [rsp + 0xd8], 0
je 0x1400c1b85
not rsi
lea rdx, [rsi + 1]
call fcn.140026990
jmp 0x1400c1baf
mov rdx, rsi
call fcn.140026900
jmp 0x1400c1baf
cmp byte [rsp + 0xd8], 0
je 0x1400c1ba7
not r14d
lea edx, [r14 + 1]
call fcn.140026a50
jmp 0x1400c1baf
mov edx, r14d
call fcn.1400269e0
test al, al
jne 0x1400c1bdf
mov rcx, qword [rsp + 0xc0]
mov rax, qword [rsp + 0x20]
mov dword [rcx + 0x30], reloc.WS2_32.dll_recv
jmp 0x1400c1bdb
mov rax, qword [rbx + 0x38]
sub rax, qword [rbx + 0x10]
add rax, rdx
mov dword [rcx + 0x30], 3
mov qword [rcx + 0x38], rax
mov r14, qword [rsp + 0x78]
mov r12, qword [rsp + 0x80]
movaps xmm6, xmmword [rsp + 0x60]
movaps xmm7, xmmword [rsp + 0x50]
movaps xmm8, xmmword [rsp + 0x40]
movaps xmm9, xmmword [rsp + 0x30]
add rsp, 0x88
pop r15
pop r13
pop rdi
pop rsi
pop rbp
pop rbx
ret