Function at 0x43ce10
Capabilities:
Validate payment card number using luhn algorithm

Disassembly:
sub esp, 0x10
push ebx
mov ebx, dword [esp + 0x1c]
push ebp
mov ebp, dword [esp + 0x30]
push esi
push edi
mov edi, dword [esp + 0x24]
mov dword [ebp], 0
mov al, byte [ebx]
cmp al, 0xa
je 0x43d365
cmp al, 0xd
je 0x43d365
mov ecx, dword [edi + 0xd4]
mov esi, 4
mov ebp, dword [esp + 0x2c]
lea eax, [ecx + 1]
mov dword [edi + 0xd4], eax
test ecx, ecx
jne 0x43d287
mov dword [edi + 0xe0], 0
mov eax, dword [edi + 0x18]
mov eax, dword [eax + 0x2b4]
mov eax, dword [eax + 0x48]
test al, 3
je 0x43d027
mov al, byte [ebx]
mov esi, ebx
test al, al
je 0x43ce92
cmp al, 0x20
je 0x43ce8a
cmp al, 9
jne 0x43ce92
mov al, byte [esi + 1]
inc esi
test al, al
jne 0x43ce82
push 5
push str.HTTP_
push esi
call fcn.004c9580
add esp, 0xc
test eax, eax
jne 0x43cf55
movsx ecx, byte [esi + 5]
mov eax, ecx
sub eax, 0x31
je 0x43cf82
sub eax, 1
je 0x43cede
sub eax, 1
je 0x43cede
push str.Unsupported_HTTP_version_in_response
push edi
call fcn.0042e230
add esp, 8
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret
mov al, byte [esi + 6]
cmp al, 0x20
je 0x43cee9
cmp al, 9
jne 0x43cf55
lea eax, [ecx - 0x30]
lea eax, [eax + eax*4]
add eax, eax
mov dword [edi + 0xe0], eax
mov cl, byte [esi + 7]
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x43cf55
mov dl, byte [esi + 8]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x43cf55
mov dh, byte [esi + 9]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x43cf55
movsx eax, cl
lea ecx, [eax + eax*4]
movsx eax, dl
lea eax, [eax + ecx*2]
lea ecx, [eax + eax*4]
movsx eax, dh
lea eax, [eax + ecx*2]
add eax, 0xffffeb30
mov dword [edi + 0xe4], eax
mov al, byte [esi + 0xa]
cmp al, 0x20
je 0x43d105
cmp al, 9
je 0x43d105
cmp al, 0xa
jl 0x43cf55
cmp al, 0xd
jle 0x43d105
push ebp
push ebx
push edi
call fcn.0043c2b0
add esp, 0xc
cmp eax, 1
jne 0x43d2b3
mov dword [edi + 0xe4], 0xc8
mov dword [edi + 0xe0], 0xa
jmp 0x43d105
cmp byte [esi + 6], 0x2e
jne 0x43d00c
mov al, byte [esi + 7]
cmp al, 0x30
je 0x43cf97
cmp al, 0x31
jne 0x43d00c
mov cl, byte [esi + 8]
cmp cl, 0x20
je 0x43cfa4
cmp cl, 9
jne 0x43d00c
movsx eax, al
sub eax, 0x26
mov dword [edi + 0xe0], eax
mov cl, byte [esi + 9]
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x43d00c
mov dl, byte [esi + 0xa]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x43d00c
mov dh, byte [esi + 0xb]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x43d00c
movsx eax, cl
lea ecx, [eax + eax*4]
movsx eax, dl
lea eax, [eax + ecx*2]
lea ecx, [eax + eax*4]
movsx eax, dh
lea eax, [eax + ecx*2]
add eax, 0xffffeb30
mov dword [edi + 0xe4], eax
mov al, byte [esi + 0xc]
cmp al, 0x20
je 0x43d105
cmp al, 9
je 0x43d105
sub al, 0xa
cmp al, 3
jbe 0x43d105
push str.Unsupported_HTTP_1_subversion_in_response
push edi
call fcn.0042e230
add esp, 8
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret
test eax, 0x40000
je 0x43d2b3
mov al, byte [ebx]
mov esi, ebx
test al, al
je 0x43d050
nop word [eax + eax]
cmp al, 0x20
je 0x43d048
cmp al, 9
jne 0x43d050
mov al, byte [esi + 1]
inc esi
test al, al
jne 0x43d040
push 5
push str.RTSP_
push esi
call fcn.004c9580
add esp, 0xc
test eax, eax
jne 0x43d2b3
mov al, byte [esi + 5]
sub al, 0x30
cmp al, 9
ja 0x43d2ba
cmp byte [esi + 6], 0x2e
jne 0x43d2ba
mov al, byte [esi + 7]
sub al, 0x30
cmp al, 9
ja 0x43d2ba
mov al, byte [esi + 8]
cmp al, 0x20
je 0x43d09b
cmp al, 9
jne 0x43d2ba
mov cl, byte [esi + 9]
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x43d2ba
mov dl, byte [esi + 0xa]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x43d2ba
mov dh, byte [esi + 0xb]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x43d2ba
movsx eax, cl
lea ecx, [eax + eax*4]
movsx eax, dl
lea eax, [eax + ecx*2]
lea ecx, [eax + eax*4]
movsx eax, dh
lea eax, [eax + ecx*2]
add eax, 0xffffeb30
mov dword [edi + 0xe4], eax
mov al, byte [esi + 0xc]
cmp al, 0x20
je 0x43d0fb
cmp al, 9
je 0x43d0fb
sub al, 0xa
cmp al, 3
ja 0x43d2ba
mov dword [edi + 0xe0], 0xb
mov ecx, dword [edi + 0xe0]
mov eax, ecx
mov esi, dword [edi + 0x18]
mov dword [esp + 0x38], esi
sub eax, 0xa
je 0x43d131
sub eax, 1
je 0x43d131
mov eax, ecx
mov ecx, 0xa
cdq
idiv ecx
mov ecx, str.Unsupported_HTTP_version___u._d__in_response
mov esi, edx
jmp 0x43d170
mov al, byte [esi + 0x3f4]
test al, al
je 0x43d18d
movzx ecx, al
mov eax, 0xcccccccd
mul ecx
mov eax, 0x66666667
mov ecx, edx
imul dword [edi + 0xe0]
shr ecx, 3
sar edx, 2
mov esi, edx
mov dword [esp + 0x24], ecx
shr esi, 0x1f
add esi, edx
cmp esi, ecx
je 0x43d189
mov eax, dword [esp + 0x24]
mov ecx, str.Version_mismatch__from_HTTP__u_to_HTTP__u_
push esi
push eax
push ecx
push edi
call fcn.0042e230
add esp, 0x10
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret
mov esi, dword [esp + 0x38]
mov eax, dword [edi + 0xe4]
mov dword [edi + 0xd28], eax
mov eax, dword [edi + 0xe0]
mov dword [edi + 0xd30], eax
movzx eax, byte [edi + 0xe0]
mov byte [esi + 0x3f4], al
mov al, byte [edi + 0xd05]
test al, al
je 0x43d1cb
mov ecx, dword [edi + 0xe0]
movzx eax, al
cmp eax, ecx
jle 0x43d1dd
jmp 0x43d1d1
mov cl, byte [edi + 0xe0]
mov byte [edi + 0xd05], cl
mov ecx, dword [edi + 0xe0]
mov eax, dword [edi + 0xbe8]
or eax, dword [edi + 0xbec]
je 0x43d207
cmp byte [edi + 0xd06], 0
jne 0x43d207
cmp dword [edi + 0xe4], 0x1a0
jne 0x43d207
mov byte [edi + 0x142], 1
cmp ecx, 0xa
jne 0x43d222
push str.HTTP_1.0__assume_close_after_body
push edi
call fcn.0042e300
push 1
push esi
call fcn.00430900
add esp, 0x10
mov ecx, dword [edi + 0xe4]
lea eax, [ecx - 0x64]
cmp eax, 0x63
setbe al
mov byte [edi + 0x143], al
sub ecx, 0xcc
je 0x43d253
sub ecx, 0x64
jne 0x43d282
cmp byte [edi + 0x3b0], cl
je 0x43d253
mov byte [edi + 0xde8], 1
mov dword [edi + 0x98], 0
mov dword [edi + 0x9c], 0
mov dword [edi + 0xa0], 0
mov dword [edi + 0xa4], 0
mov byte [edi + 0x143], 1
mov esi, 0xc
push ebp
push 0
push ebx
call fcn.004bb640
add esp, 0xc
test eax, eax
je 0x43d2c7
mov eax, str.Nul_byte_in_header
push eax
push edi
call fcn.0042e230
add esp, 8
mov eax, 8
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret
mov byte [edi + 0x139], 0
pop edi
pop esi
pop ebp
mov eax, 8
pop ebx
add esp, 0x10
ret
mov ecx, dword [edi + 0xd4]
cmp ecx, 2
jl 0x43d30d
mov al, byte [ebx]
cmp al, 0x20
je 0x43d2dc
cmp al, 9
jne 0x43d2e1
cmp ecx, 2
jg 0x43d30d
push ebp
push 0x3a
push ebx
call fcn.004bb640
add esp, 0xc
test eax, eax
jne 0x43d30d
mov eax, str.Header_without_colon
push eax
push edi
call fcn.0042e230
add esp, 8
mov eax, 8
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret
push ebp
push ebx
push edi
call fcn.0043ac10
add esp, 0xc
test eax, eax
jne 0x43d3e0
push ebp
push ebx
push 1
push edi
call fcn.0042e190
mov eax, dword [edi + 0xe4]
add esp, 0x10
sub eax, 0x64
cmp eax, 0x64
jae 0x43d33e
or esi, 0x20
push ebp
push ebx
push esi
push edi
call fcn.0042f4d0
add esp, 0x10
test eax, eax
jne 0x43d3e0
push eax
push ebp
push edi
call fcn.0043a250
add esp, 0xc
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret
mov esi, dword [esp + 0x2c]
lea eax, [esi + 1]
push eax
lea eax, [esp + 0x14]
push eax
call fcn.00422620
push esi
lea eax, [esp + 0x1c]
push ebx
push eax
call fcn.004225e0
add esp, 0x14
test eax, eax
jne 0x43d3e0
lea eax, [edi + 0x878]
push eax
call fcn.00422660
add esp, 4
lea eax, [esp + 0x24]
push eax
push dword [esp + 0x38]
lea eax, [esp + 0x18]
push dword [esp + 0x38]
push eax
call fcn.00422640
add esp, 4
push eax
lea eax, [esp + 0x20]
push eax
call fcn.00422650
add esp, 4
push eax
push edi
call fcn.0043c400
mov ecx, dword [esp + 0x3c]
mov esi, eax
add dword [ebp], ecx
lea eax, [esp + 0x28]
push eax
call fcn.004225f0
add esp, 0x1c
mov eax, esi
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret