Function at 0x451520
Capabilities:
Encode data using xor
Encrypt data using aes
Encrypt data using rc4 ksa
Reference aes constants

Disassembly:
sub esp, 0x30
push esi
mov esi, ecx
cmp byte [esi + 4], 0
jne 0x45154a
push 0x4a26ec
lea ecx, [esp + 0x2c]
call dword [sym.imp.MSVCR90.dll_public:_void___thiscall_std::exception::constructor_char_const__const_const__]
push 0x49a5f4
lea eax, [esp + 0x2c]
push eax
call sub.MSVCR90.dll__CxxThrowException
mov eax, dword [esi + 0x3cc]
cmp eax, 0x10
jne 0x45156d
mov ecx, dword [esp + 0x3c]
mov edx, dword [esp + 0x38]
push ecx
push edx
mov ecx, esi
call fcn.00450e30
pop esi
add esp, 0x30
ret 8
cdq
and edx, 3
add eax, edx
push edi
mov edi, eax
sar edi, 2
xor eax, eax
cmp edi, 4
je 0x451587
cmp edi, 6
setne al
inc eax
shl eax, 5
mov edx, dword [eax + 0x48d1ec]
push ebx
push ebp
mov ebp, dword [eax + 0x48d1f4]
mov eax, dword [eax + 0x48d1fc]
mov dword [esp + 0x24], eax
mov dword [esp + 0x20], edx
mov dword [esp + 0x18], ebp
lea eax, [esi + 0x454]
test edi, edi
jle 0x451608
lea ecx, [esi + 0x1e8]
mov dword [esp + 0x10], ecx
mov ecx, dword [esp + 0x44]
mov dword [esp + 0x14], edi
movzx ebx, byte [ecx]
shl ebx, 0x18
mov dword [eax], ebx
movzx ebx, byte [ecx + 1]
inc ecx
shl ebx, 0x10
or dword [eax], ebx
movzx ebx, byte [ecx + 1]
inc ecx
shl ebx, 8
or dword [eax], ebx
movzx ebp, byte [ecx + 1]
or dword [eax], ebp
mov ebp, dword [esp + 0x10]
mov ebp, dword [ebp]
add dword [esp + 0x10], 4
inc ecx
mov ebx, eax
xor dword [ebx], ebp
inc ecx
add eax, 4
sub dword [esp + 0x14], 1
jne 0x4515c6
mov ebp, dword [esp + 0x18]
mov eax, 1
cmp dword [esi + 0x3d0], eax
mov dword [esp + 0x1c], eax
jle 0x451729
lea eax, [esi + 0x208]
lea ebx, [esi + 0x434]
mov dword [esp + 0x44], eax
lea ecx, [ecx]
test edi, edi
jle 0x4516ed
mov eax, dword [esp + 0x44]
mov dword [esp + 0x14], eax
mov eax, ebp
mov ebp, dword [esp + 0x24]
sub eax, edx
sub ebp, edx
mov ecx, edx
mov dword [esp + 0x28], eax
mov dword [esp + 0x2c], ebp
mov dword [esp + 0x10], edi
jmp 0x451668
mov eax, dword [esp + 0x28]
mov ebp, dword [esp + 0x2c]
add eax, ecx
cdq
idiv edi
add ebx, 4
mov eax, dword [esi + edx*4 + 0x454]
sar eax, 8
and eax, 0xff
mov dword [esp + 0x30], eax
lea eax, [ecx + ebp]
cdq
idiv edi
mov eax, dword [esp + 0x30]
mov ebp, dword [eax*4 + 0x48b9c0]
mov eax, ecx
inc ecx
mov edx, dword [esi + edx*4 + 0x454]
and edx, 0xff
xor ebp, dword [edx*4 + 0x48bdc0]
cdq
idiv edi
movsx eax, word [esi + edx*4 + 0x456]
movzx edx, byte [ebx + 0x1f]
and eax, 0xff
xor ebp, dword [eax*4 + 0x48b5c0]
mov eax, dword [esp + 0x14]
xor ebp, dword [edx*4 + 0x48b1c0]
add eax, 4
xor ebp, dword [eax - 4]
sub dword [esp + 0x10], 1
mov dword [ebx - 4], ebp
mov dword [esp + 0x14], eax
jne 0x451660
mov ebp, dword [esp + 0x18]
lea eax, [edi*4]
push eax
lea ebx, [esi + 0x434]
lea eax, [esi + 0x454]
push ebx
push eax
call sub.MSVCR90.dll_memcpy
mov eax, dword [esp + 0x28]
add dword [esp + 0x50], 0x20
mov edx, dword [esp + 0x2c]
inc eax
add esp, 0xc
cmp eax, dword [esi + 0x3d0]
mov dword [esp + 0x1c], eax
jl 0x451630
mov dword [esp + 0x44], 0
test edi, edi
jle 0x45180d
mov ecx, dword [esp + 0x48]
lea eax, [esi + 0x454]
mov dword [esp + 0x48], eax
mov eax, dword [esp + 0x24]
sub edx, ebp
sub eax, ebp
mov dword [esp + 0x30], edx
mov dword [esp + 0x2c], eax
jmp 0x451760
mov eax, dword [esi + 0x3d0]
mov edx, dword [esp + 0x44]
lea eax, [edx + eax*8]
mov ebx, dword [esi + eax*4 + 0x1e8]
mov edx, dword [esp + 0x48]
movzx eax, byte [edx + 3]
mov edx, ebx
sar edx, 0x18
xor dl, byte [eax + 0x48a0c0]
mov eax, dword [esp + 0x30]
mov byte [ecx], dl
add eax, ebp
cdq
idiv edi
mov eax, ebx
sar eax, 0x10
inc ecx
inc ecx
add dword [esp + 0x48], 4
inc ecx
inc ecx
movsx edx, word [esi + edx*4 + 0x456]
and edx, 0xff
xor al, byte [edx + 0x48a0c0]
mov byte [ecx - 3], al
mov eax, ebp
cdq
idiv edi
mov eax, ebx
sar eax, 8
mov edx, dword [esi + edx*4 + 0x454]
sar edx, 8
and edx, 0xff
xor al, byte [edx + 0x48a0c0]
mov edx, dword [esp + 0x2c]
mov byte [ecx - 2], al
lea eax, [edx + ebp]
cdq
idiv edi
inc ebp
mov eax, dword [esi + edx*4 + 0x454]
and eax, 0xff
mov dl, byte [eax + 0x48a0c0]
mov eax, dword [esp + 0x44]
xor dl, bl
inc eax
cmp eax, edi
mov byte [ecx - 1], dl
mov dword [esp + 0x44], eax
jl 0x451760
pop ebp
pop ebx
pop edi
pop esi
add esp, 0x30
ret 8