Function at 0x42baf0
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 0x42c03f
cmp al, 0xd
je 0x42c03f
mov ecx, dword [edi + 0xd4]
lea ebp, [edi + 0xd4]
mov esi, 4
lea eax, [ecx + 1]
mov dword [ebp], eax
test ecx, ecx
jne 0x42bf59
mov dword [edi + 0xe0], ecx
mov eax, dword [edi + 0x18]
mov eax, dword [eax + 0x2b4]
mov eax, dword [eax + 0x48]
test al, 3
je 0x42bd08
mov al, byte [ebx]
mov esi, ebx
test al, al
je 0x42bb70
nop dword [eax]
cmp al, 0x20
je 0x42bb68
cmp al, 9
jne 0x42bb70
mov al, byte [esi + 1]
inc esi
test al, al
jne 0x42bb60
push 5
push str.HTTP_
push esi
call sub.api_ms_win_crt_string_l1_1_0.dll_strncmp
add esp, 0xc
test eax, eax
jne 0x42bc33
movsx ecx, byte [esi + 5]
mov eax, ecx
sub eax, 0x31
je 0x42bc63
sub eax, 1
je 0x42bbbc
sub eax, 1
je 0x42bbbc
push str.Unsupported_HTTP_version_in_response
push edi
call fcn.00419ee0
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 0x42bbc7
cmp al, 9
jne 0x42bc33
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 0x42bc33
mov dl, byte [esi + 8]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x42bc33
mov dh, byte [esi + 9]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x42bc33
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 0x42bde5
cmp al, 9
je 0x42bde5
cmp al, 0xa
jl 0x42bc33
cmp al, 0xd
jle 0x42bde5
push dword [esp + 0x2c]
push ebx
push edi
call fcn.0042aec0
add esp, 0xc
cmp eax, 1
jne 0x42bf88
mov dword [edi + 0xe4], 0xc8
mov dword [edi + 0xe0], 0xa
jmp 0x42bde5
cmp byte [esi + 6], 0x2e
jne 0x42bced
mov al, byte [esi + 7]
cmp al, 0x30
je 0x42bc78
cmp al, 0x31
jne 0x42bced
mov cl, byte [esi + 8]
cmp cl, 0x20
je 0x42bc85
cmp cl, 9
jne 0x42bced
movsx eax, al
sub eax, 0x26
mov dword [edi + 0xe0], eax
mov cl, byte [esi + 9]
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x42bced
mov dl, byte [esi + 0xa]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x42bced
mov dh, byte [esi + 0xb]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x42bced
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 0x42bde5
cmp al, 9
je 0x42bde5
sub al, 0xa
cmp al, 3
jbe 0x42bde5
push str.Unsupported_HTTP_1_subversion_in_response
push edi
call fcn.00419ee0
add esp, 8
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret
test eax, 0x40000
je 0x42bf88
mov al, byte [ebx]
mov esi, ebx
test al, al
je 0x42bd30
nop dword [eax + eax]
cmp al, 0x20
je 0x42bd28
cmp al, 9
jne 0x42bd30
mov al, byte [esi + 1]
inc esi
test al, al
jne 0x42bd20
push 5
push str.RTSP_
push esi
call sub.api_ms_win_crt_string_l1_1_0.dll_strncmp
add esp, 0xc
test eax, eax
jne 0x42bf88
mov al, byte [esi + 5]
sub al, 0x30
cmp al, 9
ja 0x42bf8f
cmp byte [esi + 6], 0x2e
jne 0x42bf8f
mov al, byte [esi + 7]
sub al, 0x30
cmp al, 9
ja 0x42bf8f
mov al, byte [esi + 8]
cmp al, 0x20
je 0x42bd7b
cmp al, 9
jne 0x42bf8f
mov cl, byte [esi + 9]
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x42bf8f
mov dl, byte [esi + 0xa]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x42bf8f
mov dh, byte [esi + 0xb]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x42bf8f
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 0x42bddb
cmp al, 9
je 0x42bddb
sub al, 0xa
cmp al, 3
ja 0x42bf8f
mov dword [edi + 0xe0], 0xb
mov ecx, dword [edi + 0xe0]
mov eax, ecx
mov esi, dword [edi + 0x18]
sub eax, 0xa
je 0x42be0f
sub eax, 1
je 0x42be0f
mov eax, ecx
mov ecx, 0xa
cdq
idiv ecx
mov ebp, eax
mov ecx, edx
mov eax, str.Unsupported_HTTP_version___u._d__in_response
jmp 0x42be46
mov al, byte [esi + 0x518]
test al, al
je 0x42be5f
movzx ecx, al
mov eax, 0xcccccccd
mul ecx
mov eax, 0x66666667
mov ebp, edx
imul dword [edi + 0xe0]
shr ebp, 3
sar edx, 2
mov ecx, edx
shr ecx, 0x1f
add ecx, edx
cmp ecx, ebp
je 0x42be5f
mov eax, str.Version_mismatch__from_HTTP__u_to_HTTP__u_
push ecx
push ebp
push eax
push edi
call fcn.00419ee0
add esp, 0x10
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret
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 + 0x518], al
mov al, byte [edi + 0xd05]
test al, al
je 0x42be99
movzx eax, al
cmp eax, dword [edi + 0xe0]
jle 0x42bea5
mov al, byte [edi + 0xe0]
mov byte [edi + 0xd05], al
mov eax, dword [edi + 0xbe8]
or eax, dword [edi + 0xbec]
je 0x42becf
cmp byte [edi + 0xd06], 0
jne 0x42becf
cmp dword [edi + 0xe4], 0x1a0
jne 0x42becf
mov byte [edi + 0x143], 1
cmp dword [edi + 0xe0], 0xa
jne 0x42beee
push str.HTTP_1.0__assume_close_after_body
push edi
call fcn.00419fb0
push 1
push esi
call fcn.0041c6c0
add esp, 0x10
mov ecx, dword [edi + 0xe4]
lea eax, [ecx - 0x64]
cmp eax, 0x63
setbe al
mov byte [edi + 0x144], al
sub ecx, 0xcc
je 0x42bf1f
sub ecx, 0x64
jne 0x42bf4e
cmp byte [edi + 0x3c0], cl
je 0x42bf1f
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 + 0x144], 1
mov esi, 0xc
lea ebp, [edi + 0xd4]
push dword [esp + 0x2c]
push 0
push ebx
call sub.VCRUNTIME140.dll_memchr
add esp, 0xc
test eax, eax
je 0x42bf9c
mov eax, str.Nul_byte_in_header
push eax
push edi
call fcn.00419ee0
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 [ebp]
cmp ecx, 2
jl 0x42bfe3
mov al, byte [ebx]
cmp al, 0x20
je 0x42bfae
cmp al, 9
jne 0x42bfb3
cmp ecx, 2
jg 0x42bfe3
mov ebp, dword [esp + 0x2c]
push ebp
push 0x3a
push ebx
call sub.VCRUNTIME140.dll_memchr
add esp, 0xc
test eax, eax
jne 0x42bfe7
mov eax, str.Header_without_colon
push eax
push edi
call fcn.00419ee0
add esp, 8
mov eax, 8
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret
mov ebp, dword [esp + 0x2c]
push ebp
push ebx
push edi
call fcn.004295e0
add esp, 0xc
test eax, eax
jne 0x42c0ba
push ebp
push ebx
push 1
push edi
call fcn.00419e40
mov eax, dword [edi + 0xe4]
add esp, 0x10
sub eax, 0x64
cmp eax, 0x64
jae 0x42c018
or esi, 0x20
push ebp
push ebx
push esi
push edi
call fcn.0041b1c0
add esp, 0x10
test eax, eax
jne 0x42c0ba
push eax
push ebp
push edi
call fcn.00428c30
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.00406f20
push esi
lea eax, [esp + 0x1c]
push ebx
push eax
call fcn.00406ee0
add esp, 0x14
test eax, eax
jne 0x42c0ba
lea eax, [edi + 0x890]
push eax
call fcn.00406f50
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.00406f40
add esp, 4
push eax
lea eax, [esp + 0x20]
push eax
call fcn.00403a00
add esp, 4
push eax
push edi
call fcn.0042b010
mov ecx, dword [esp + 0x3c]
mov esi, eax
add dword [ebp], ecx
lea eax, [esp + 0x28]
push eax
call fcn.00406ef0
add esp, 0x1c
mov eax, esi
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret