Function at 0x474780
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 0x474cd5
cmp al, 0xd
je 0x474cd5
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 0x474bf7
mov dword [edi + 0xe0], 0
mov eax, dword [edi + 0x18]
mov eax, dword [eax + 0x2b4]
mov eax, dword [eax + 0x48]
test eax, 0xc0000003
je 0x47499a
mov al, byte [ebx]
mov esi, ebx
test al, al
je 0x474805
cmp al, 0x20
je 0x4747fd
cmp al, 9
jne 0x474805
mov al, byte [esi + 1]
inc esi
test al, al
jne 0x4747f5
push 5
push str.HTTP_
push esi
call fcn.004fef00
add esp, 0xc
test eax, eax
jne 0x4748c8
movsx ecx, byte [esi + 5]
mov eax, ecx
sub eax, 0x31
je 0x4748f5
sub eax, 1
je 0x474851
sub eax, 1
je 0x474851
push str.Unsupported_HTTP_version_in_response
push edi
call fcn.004606d0
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 0x47485c
cmp al, 9
jne 0x4748c8
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 0x4748c8
mov dl, byte [esi + 8]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x4748c8
mov dh, byte [esi + 9]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x4748c8
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 0x474a75
cmp al, 9
je 0x474a75
cmp al, 0xa
jl 0x4748c8
cmp al, 0xd
jle 0x474a75
push ebp
push ebx
push edi
call fcn.00473ab0
add esp, 0xc
cmp eax, 1
jne 0x474c23
mov dword [edi + 0xe4], 0xc8
mov dword [edi + 0xe0], 0xa
jmp 0x474a75
cmp byte [esi + 6], 0x2e
jne 0x47497f
mov al, byte [esi + 7]
cmp al, 0x30
je 0x47490a
cmp al, 0x31
jne 0x47497f
mov cl, byte [esi + 8]
cmp cl, 0x20
je 0x474917
cmp cl, 9
jne 0x47497f
movsx eax, al
sub eax, 0x26
mov dword [edi + 0xe0], eax
mov cl, byte [esi + 9]
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x47497f
mov dl, byte [esi + 0xa]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x47497f
mov dh, byte [esi + 0xb]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x47497f
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 0x474a75
cmp al, 9
je 0x474a75
sub al, 0xa
cmp al, 3
jbe 0x474a75
push str.Unsupported_HTTP_1_subversion_in_response
push edi
call fcn.004606d0
add esp, 8
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret
test eax, 0x40000
je 0x474c23
mov al, byte [ebx]
mov esi, ebx
test al, al
je 0x4749c0
nop dword [eax]
cmp al, 0x20
je 0x4749b8
cmp al, 9
jne 0x4749c0
mov al, byte [esi + 1]
inc esi
test al, al
jne 0x4749b0
push 5
push str.RTSP_
push esi
call fcn.004fef00
add esp, 0xc
test eax, eax
jne 0x474c23
mov al, byte [esi + 5]
sub al, 0x30
cmp al, 9
ja 0x474c2a
cmp byte [esi + 6], 0x2e
jne 0x474c2a
mov al, byte [esi + 7]
sub al, 0x30
cmp al, 9
ja 0x474c2a
mov al, byte [esi + 8]
cmp al, 0x20
je 0x474a0b
cmp al, 9
jne 0x474c2a
mov cl, byte [esi + 9]
lea eax, [ecx - 0x30]
cmp al, 9
ja 0x474c2a
mov dl, byte [esi + 0xa]
lea eax, [edx - 0x30]
cmp al, 9
ja 0x474c2a
mov dh, byte [esi + 0xb]
mov al, dh
sub al, 0x30
cmp al, 9
ja 0x474c2a
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 0x474a6b
cmp al, 9
je 0x474a6b
sub al, 0xa
cmp al, 3
ja 0x474c2a
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 0x474aa1
sub eax, 1
je 0x474aa1
mov eax, ecx
mov ecx, 0xa
cdq
idiv ecx
mov ecx, str.Unsupported_HTTP_version___u._d__in_response
mov esi, edx
jmp 0x474ae0
mov al, byte [esi + 0x518]
test al, al
je 0x474afd
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 0x474af9
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.004606d0
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 + 0xd50], eax
mov eax, dword [edi + 0xe0]
mov dword [edi + 0xd58], eax
movzx eax, byte [edi + 0xe0]
mov byte [esi + 0x518], al
mov al, byte [edi + 0xd2d]
test al, al
je 0x474b3b
mov ecx, dword [edi + 0xe0]
movzx eax, al
cmp eax, ecx
jle 0x474b4d
jmp 0x474b41
mov cl, byte [edi + 0xe0]
mov byte [edi + 0xd2d], cl
mov ecx, dword [edi + 0xe0]
mov eax, dword [edi + 0xbf8]
or eax, dword [edi + 0xbfc]
je 0x474b77
cmp byte [edi + 0xd2e], 0
jne 0x474b77
cmp dword [edi + 0xe4], 0x1a0
jne 0x474b77
mov byte [edi + 0x143], 1
cmp ecx, 0xa
jne 0x474b92
push str.HTTP_1.0__assume_close_after_body
push edi
call fcn.004607a0
push 1
push esi
call fcn.00462f20
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 0x474bc3
sub ecx, 0x64
jne 0x474bf2
cmp byte [edi + 0x3c0], cl
je 0x474bc3
mov byte [edi + 0xe10], 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
push ebp
push 0
push ebx
call fcn.004f3fd0
add esp, 0xc
test eax, eax
je 0x474c37
mov eax, str.Nul_byte_in_header
push eax
push edi
call fcn.004606d0
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 0x474c7d
mov al, byte [ebx]
cmp al, 0x20
je 0x474c4c
cmp al, 9
jne 0x474c51
cmp ecx, 2
jg 0x474c7d
push ebp
push 0x3a
push ebx
call fcn.004f3fd0
add esp, 0xc
test eax, eax
jne 0x474c7d
mov eax, str.Header_without_colon
push eax
push edi
call fcn.004606d0
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.00472220
add esp, 0xc
test eax, eax
jne 0x474d50
push ebp
push ebx
push 1
push edi
call fcn.00460630
mov eax, dword [edi + 0xe4]
add esp, 0x10
sub eax, 0x64
cmp eax, 0x64
jae 0x474cae
or esi, 0x20
push ebp
push ebx
push esi
push edi
call fcn.004619f0
add esp, 0x10
test eax, eax
jne 0x474d50
push eax
push ebp
push edi
call fcn.00471820
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.00452e30
push esi
lea eax, [esp + 0x1c]
push ebx
push eax
call fcn.00452df0
add esp, 0x14
test eax, eax
jne 0x474d50
lea eax, [edi + 0x8a0]
push eax
call fcn.00452e50
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.00450e20
add esp, 4
push eax
lea eax, [esp + 0x20]
push eax
call fcn.00450d70
add esp, 4
push eax
push edi
call fcn.00473c00
mov ecx, dword [esp + 0x3c]
mov esi, eax
add dword [ebp], ecx
lea eax, [esp + 0x28]
push eax
call fcn.00452e00
add esp, 0x1c
mov eax, esi
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x10
ret