Function at 0x44a1b0
Capabilities:
Validate payment card number using luhn algorithm

Disassembly:
push ebx
mov ebx, dword [esp + 0xc]
push ebp
mov ebp, dword [esp + 0x14]
push esi
mov esi, dword [esp + 0x10]
push edi
mov edi, dword [esp + 0x28]
mov dword [edi], 0
mov al, byte [ebx]
cmp al, 0xa
je 0x44a70f
cmp al, 0xd
je 0x44a70f
mov ecx, dword [esi + 0xc4]
mov edi, 4
lea eax, [ecx + 1]
mov dword [esi + 0xc4], eax
test ecx, ecx
jne 0x44a63d
mov dword [esi + 0xd0], ecx
mov eax, dword [esi + 0x18]
mov eax, dword [eax + 0x260]
mov eax, dword [eax + 0x48]
test al, 3
je 0x44a3c0
mov al, byte [ebx]
mov edi, ebx
test al, al
je 0x44a230
nop word [eax + eax]
cmp al, 0x20
je 0x44a228
cmp al, 9
jne 0x44a230
mov al, byte [edi + 1]
inc edi
test al, al
jne 0x44a220
push 5
push str.HTTP_
push edi
call dword [sym.imp.api_ms_win_crt_string_l1_1_0.dll_strncmp]
add esp, 0xc
test eax, eax
jne 0x44a2f1
movsx ecx, byte [edi + 5]
mov eax, ecx
sub eax, 0x31
je 0x44a31e
sub eax, 1
je 0x44a27a
sub eax, 1
je 0x44a27a
push str.Unsupported_HTTP_version_in_response
push esi
call fcn.0043b8f0
add esp, 8
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
ret
mov al, byte [edi + 6]
cmp al, 0x20
je 0x44a285
cmp al, 9
jne 0x44a2f1
lea eax, [ecx - 0x30]
lea eax, [eax + eax*4]
add eax, eax
mov dword [esi + 0xd0], eax
mov cl, byte [edi + 7]
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x44a2f1
mov dl, byte [edi + 8]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x44a2f1
mov dh, byte [edi + 9]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x44a2f1
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 [esi + 0xd4], eax
mov al, byte [edi + 0xa]
cmp al, 0x20
je 0x44a499
cmp al, 9
je 0x44a499
cmp al, 0xa
jl 0x44a2f1
cmp al, 0xd
jle 0x44a499
push ebp
push ebx
push esi
call fcn.00449600
add esp, 0xc
cmp eax, 1
jne 0x44a666
mov dword [esi + 0xd4], 0xc8
mov dword [esi + 0xd0], 0xa
jmp 0x44a499
cmp byte [edi + 6], 0x2e
jne 0x44a3a8
mov al, byte [edi + 7]
cmp al, 0x30
je 0x44a333
cmp al, 0x31
jne 0x44a3a8
mov cl, byte [edi + 8]
cmp cl, 0x20
je 0x44a340
cmp cl, 9
jne 0x44a3a8
movsx eax, al
sub eax, 0x26
mov dword [esi + 0xd0], eax
mov cl, byte [edi + 9]
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x44a3a8
mov dl, byte [edi + 0xa]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x44a3a8
mov dh, byte [edi + 0xb]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x44a3a8
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 [esi + 0xd4], eax
mov al, byte [edi + 0xc]
cmp al, 0x20
je 0x44a499
cmp al, 9
je 0x44a499
sub al, 0xa
cmp al, 3
jbe 0x44a499
push str.Unsupported_HTTP_1_subversion_in_response
push esi
call fcn.0043b8f0
add esp, 8
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
ret
test eax, 0x40000
je 0x44a666
mov al, byte [ebx]
mov edi, ebx
test al, al
je 0x44a3e3
cmp al, 0x20
je 0x44a3db
cmp al, 9
jne 0x44a3e3
mov al, byte [edi + 1]
inc edi
test al, al
jne 0x44a3d3
push 5
push str.RTSP_
push edi
call dword [sym.imp.api_ms_win_crt_string_l1_1_0.dll_strncmp]
add esp, 0xc
test eax, eax
jne 0x44a666
mov al, byte [edi + 5]
sub al, 0x30
cmp al, 9
ja 0x44a66d
cmp byte [edi + 6], 0x2e
jne 0x44a66d
mov al, byte [edi + 7]
sub al, 0x30
cmp al, 9
ja 0x44a66d
mov al, byte [edi + 8]
cmp al, 0x20
je 0x44a42f
cmp al, 9
jne 0x44a66d
mov cl, byte [edi + 9]
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x44a66d
mov dl, byte [edi + 0xa]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x44a66d
mov dh, byte [edi + 0xb]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x44a66d
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 [esi + 0xd4], eax
mov al, byte [edi + 0xc]
cmp al, 0x20
je 0x44a48f
cmp al, 9
je 0x44a48f
sub al, 0xa
cmp al, 3
ja 0x44a66d
mov dword [esi + 0xd0], 0xb
mov ecx, dword [esi + 0xd0]
mov eax, ecx
mov edi, dword [esi + 0x18]
sub eax, 0xa
je 0x44a4c9
sub eax, 1
je 0x44a4c9
mov eax, ecx
mov ecx, 0xa
cdq
idiv ecx
mov ecx, str.Unsupported_HTTP_version___u._d__in_response
mov dword [esp + 0x14], edx
mov edx, eax
mov eax, dword [esp + 0x14]
jmp 0x44a508
mov al, byte [edi + 0x4d4]
test al, al
je 0x44a51e
movzx ecx, al
mov eax, 0xcccccccd
mul ecx
mov eax, 0x66666667
mov ecx, edx
imul dword [esi + 0xd0]
shr ecx, 3
sar edx, 2
mov eax, edx
mov dword [esp + 0x14], ecx
shr eax, 0x1f
add eax, edx
cmp eax, ecx
je 0x44a51e
mov edx, dword [esp + 0x14]
mov ecx, str.Version_mismatch__from_HTTP__u_to_HTTP__u_
push eax
push edx
push ecx
push esi
call fcn.0043b8f0
add esp, 0x10
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
ret
mov eax, dword [esi + 0xd4]
mov dword [esi + 0xd08], eax
mov eax, dword [esi + 0xd0]
mov dword [esi + 0xd10], eax
movzx eax, byte [esi + 0xd0]
mov byte [edi + 0x4d4], al
mov al, byte [esi + 0xce5]
test al, al
je 0x44a55c
mov ecx, dword [esi + 0xd0]
movzx eax, al
cmp eax, ecx
jle 0x44a56e
jmp 0x44a562
mov cl, byte [esi + 0xd0]
mov byte [esi + 0xce5], cl
mov ecx, dword [esi + 0xd0]
mov eax, dword [esi + 0xbc8]
or eax, dword [esi + 0xbcc]
je 0x44a598
cmp byte [esi + 0xce6], 0
jne 0x44a598
cmp dword [esi + 0xd4], 0x1a0
jne 0x44a598
mov byte [esi + 0x136], 1
cmp ecx, 0xa
jne 0x44a5b5
push str.HTTP_1.0__assume_close_after_body
push esi
call fcn.0043b9c0
push 1
push edi
call fcn.0043dcc0
add esp, 0x10
jmp 0x44a5d8
cmp ecx, 0x14
je 0x44a5cc
cmp dword [esi + 0xdc], 2
jne 0x44a5d8
cmp dword [esi + 0xd4], 0x65
jne 0x44a5d8
mov eax, dword [edi + 0x4a8]
mov dword [eax], 2
mov ecx, dword [esi + 0xd4]
lea eax, [ecx - 0x64]
cmp eax, 0x63
setbe al
mov byte [esi + 0x137], al
sub ecx, 0xcc
je 0x44a609
sub ecx, 0x64
jne 0x44a638
cmp byte [esi + 0x3b0], cl
je 0x44a609
mov byte [esi + 0xdc8], 1
mov dword [esi + 0x88], 0
mov dword [esi + 0x8c], 0
mov dword [esi + 0x90], 0
mov dword [esi + 0x94], 0
mov byte [esi + 0x137], 1
mov edi, 0xc
push ebp
push 0
push ebx
call sub.VCRUNTIME140.dll_memchr
add esp, 0xc
test eax, eax
je 0x44a677
mov eax, str.Nul_byte_in_header
push eax
push esi
call fcn.0043b8f0
add esp, 8
mov eax, 8
pop edi
pop esi
pop ebp
pop ebx
ret
mov byte [esi + 0x12d], 0
pop edi
pop esi
pop ebp
mov eax, 8
pop ebx
ret
mov ecx, dword [esi + 0xc4]
cmp ecx, 2
jl 0x44a6ba
mov al, byte [ebx]
cmp al, 0x20
je 0x44a68c
cmp al, 9
jne 0x44a691
cmp ecx, 2
jg 0x44a6ba
push ebp
push 0x3a
push ebx
call sub.VCRUNTIME140.dll_memchr
add esp, 0xc
test eax, eax
jne 0x44a6ba
mov eax, str.Header_without_colon
push eax
push esi
call fcn.0043b8f0
add esp, 8
mov eax, 8
pop edi
pop esi
pop ebp
pop ebx
ret
push ebp
push ebx
push esi
call fcn.00447da0
add esp, 0xc
test eax, eax
jne 0x44a7ec
push ebp
push ebx
push 1
push esi
call fcn.0043b840
mov eax, dword [esi + 0xd4]
add esp, 0x10
sub eax, 0x64
cmp eax, 0x64
jae 0x44a6eb
or edi, 0x20
push ebp
push ebx
push edi
push esi
call fcn.0043caa0
add esp, 0x10
test eax, eax
jne 0x44a7ec
push eax
push ebp
push esi
call fcn.004473e0
add esp, 0xc
pop edi
pop esi
pop ebp
pop ebx
ret
push ebp
push ebx
push 1
push esi
call fcn.0043b840
mov eax, dword [esi + 0xd4]
sub eax, 0x64
cmp eax, 0x64
push ebp
sbb eax, eax
and eax, 0x20
add eax, 4
push ebx
push eax
push esi
call fcn.0043caa0
add esp, 0x20
test eax, eax
jne 0x44a7ec
mov ecx, dword [esi + 0xbc]
mov edx, 0x4b000
add ecx, ebp
cmp ebp, edx
jae 0x44a780
mov eax, dword [esi + 0xd48]
add dword [esi + 0xb8], ebp
add eax, ebp
mov dword [esi + 0xd48], eax
mov dword [esi + 0xbc], ecx
cmp ecx, edx
ja 0x44a786
cmp eax, 0x5dc000
jbe 0x44a7a0
mov ecx, eax
mov edx, 0x5dc000
jmp 0x44a786
mov eax, ecx
test eax, eax
je 0x44a7a0
push edx
push ecx
push str.Too_large_response_headers:__zu____u
push esi
call fcn.0043b8f0
add esp, 0x10
mov eax, 0x38
pop edi
pop esi
pop ebp
pop ebx
ret
mov eax, dword [esi + 0xd4]
sub eax, 0x64
cmp eax, 0x63
ja 0x44a7b6
mov eax, dword [esi + 0xb8]
jmp 0x44a7b8
xor eax, eax
mov dword [esi + 0xc0], eax
lea eax, [esi + 0x870]
push eax
call fcn.0042f880
lea eax, [esp + 0x18]
push eax
push dword [esp + 0x2c]
push dword [esp + 0x2c]
push esi
call fcn.00449750
add esp, 0x14
test eax, eax
jne 0x44a7ec
mov eax, dword [esp + 0x14]
add dword [edi], eax
xor eax, eax
pop edi
pop esi
pop ebp
pop ebx
ret