Function at 0x403a72
Capabilities:
Encode data using xor
Encrypt data using aes
Encrypt data using rc4 ksa
Reference aes constants

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x14
cmp dword [ebp + 8], 0
push ebx
push esi
push edi
mov esi, ecx
jne 0x403aa4
lea eax, [ebp + 0xc]
lea ecx, [ebp - 0x14]
push eax
mov dword [ebp + 0xc], str.Empty_key
call fcn.0040ddbc
lea eax, [ebp - 0x14]
push 0x420c48
push eax
call fcn.0040de66
mov ecx, dword [ebp + 0x10]
push 0x18
pop ebx
push 0x10
pop edi
cmp ecx, edi
je 0x403adb
cmp ecx, ebx
je 0x403adb
cmp ecx, 0x20
je 0x403adb
lea eax, [ebp + 0xc]
lea ecx, [ebp - 0x14]
push eax
mov dword [ebp + 0xc], str.Incorrect_key_length
call fcn.0040ddbc
lea eax, [ebp - 0x14]
push 0x420c48
push eax
call fcn.0040de66
mov eax, dword [ebp + 0x14]
cmp eax, edi
je 0x403b0c
cmp eax, ebx
je 0x403b0c
cmp eax, 0x20
je 0x403b0c
lea eax, [ebp + 0xc]
lea ecx, [ebp - 0x14]
push eax
mov dword [ebp + 0xc], str.Incorrect_block_length
call fcn.0040ddbc
lea eax, [ebp - 0x14]
push 0x420c48
push eax
call fcn.0040de66
push eax
mov dword [esi + 0x3cc], eax
push dword [ebp + 0xc]
lea eax, [esi + 0x3d4]
mov dword [esi + 0x3c8], ecx
push eax
call fcn.0040cff0
push dword [esi + 0x3cc]
lea eax, [esi + 0x3f4]
push dword [ebp + 0xc]
push eax
call fcn.0040cff0
mov eax, dword [esi + 0x3c8]
add esp, 0x18
cmp eax, edi
je 0x403b6e
cmp eax, ebx
je 0x403b5a
mov dword [esi + 0x3d0], 0xe
jmp 0x403b93
xor eax, eax
cmp dword [esi + 0x3cc], 0x20
sete al
dec eax
and al, 0xfe
add eax, 0xe
jmp 0x403b8d
mov eax, dword [esi + 0x3cc]
cmp eax, edi
jne 0x403b7d
push 0xa
pop eax
jmp 0x403b8d
xor ecx, ecx
cmp eax, ebx
setne cl
dec ecx
and ecx, 0xfffffffe
add ecx, 0xe
mov eax, ecx
mov dword [esi + 0x3d0], eax
mov eax, dword [esi + 0x3cc]
push 4
cdq
pop ecx
idiv ecx
xor edx, edx
cmp dword [esi + 0x3d0], edx
mov dword [ebp + 0x10], eax
jl 0x403bc8
lea ebx, [esi + 8]
mov ecx, dword [ebp + 0x10]
test ecx, ecx
jle 0x403bbc
xor eax, eax
mov edi, ebx
rep stosd dword es:[edi], eax
inc edx
add ebx, 0x20
cmp edx, dword [esi + 0x3d0]
jle 0x403baf
xor edx, edx
cmp dword [esi + 0x3d0], edx
jl 0x403bf1
lea ebx, [esi + 0x1e8]
mov ecx, dword [ebp + 0x10]
test ecx, ecx
jle 0x403be5
xor eax, eax
mov edi, ebx
rep stosd dword es:[edi], eax
inc edx
add ebx, 0x20
cmp edx, dword [esi + 0x3d0]
jle 0x403bd8
mov eax, dword [esi + 0x3c8]
push 4
cdq
pop ecx
mov edi, dword [esi + 0x3d0]
idiv ecx
inc edi
mov ecx, dword [ebp + 8]
imul edi, dword [ebp + 0x10]
mov dword [ebp - 8], edi
mov edx, eax
lea eax, [esi + 0x414]
test edx, edx
mov dword [ebp - 4], edx
jle 0x403c47
mov dword [ebp + 0xc], edx
movzx ebx, byte [ecx]
shl ebx, 0x18
inc ecx
mov dword [eax], ebx
movzx ebx, byte [ecx]
shl ebx, 0x10
or dword [eax], ebx
inc ecx
xor ebx, ebx
mov bh, byte [ecx]
or dword [eax], ebx
inc ecx
movzx ebx, byte [ecx]
or dword [eax], ebx
inc ecx
add eax, 4
dec dword [ebp + 0xc]
jne 0x403c20
and dword [ebp + 0xc], 0
test edx, edx
jle 0x403c9e
lea ecx, [esi + 0x414]
cmp dword [ebp + 0xc], edi
jge 0x403dfd
mov eax, dword [ebp + 0xc]
mov ebx, dword [ecx]
cdq
idiv dword [ebp + 0x10]
mov dword [ebp + 8], eax
mov eax, dword [ebp + 0xc]
cdq
idiv dword [ebp + 0x10]
mov eax, dword [ebp + 8]
lea eax, [edx + eax*8]
mov dword [esi + eax*4 + 8], ebx
mov eax, dword [esi + 0x3d0]
sub eax, dword [ebp + 8]
inc dword [ebp + 0xc]
lea eax, [edx + eax*8]
mov edx, dword [ecx]
add ecx, 4
mov dword [esi + eax*4 + 0x1e8], edx
mov edx, dword [ebp - 4]
cmp dword [ebp + 0xc], edx
jl 0x403c55
cmp dword [ebp + 0xc], edi
jge 0x403dfd
mov dword [ebp + 0x14], 0x41cbf8
mov eax, dword [esi + edx*4 + 0x410]
mov ebx, dword [ebp + 0x14]
mov dword [ebp + 8], eax
xor ecx, ecx
mov cl, byte [ebp + 0xa]
movsx ebx, byte [ebx]
movsx ecx, byte [ecx + str.cw]
xor ecx, ebx
xor ebx, ebx
mov bl, ah
and eax, 0xff
shl ecx, 8
movzx ebx, byte [ebx + str.cw]
movzx eax, byte [eax + str.cw]
xor ecx, ebx
shl ecx, 8
xor ecx, eax
xor eax, eax
mov al, byte [ebp + 0xb]
shl ecx, 8
movzx eax, byte [eax + str.cw]
xor ecx, eax
xor dword [esi + 0x414], ecx
inc dword [ebp + 0x14]
cmp edx, 8
je 0x403d2b
cmp edx, 1
jle 0x403da0
lea eax, [esi + 0x418]
lea ecx, [edx - 1]
mov ebx, dword [eax - 4]
xor dword [eax], ebx
add eax, 4
dec ecx
jne 0x403d1e
jmp 0x403da0
push 3
lea eax, [esi + 0x418]
pop ecx
mov ebx, dword [eax - 4]
xor dword [eax], ebx
add eax, 4
dec ecx
jne 0x403d34
mov eax, dword [esi + 0x420]
xor ecx, ecx
mov dword [ebp + 8], eax
xor ebx, ebx
mov cl, byte [ebp + 0xb]
mov bl, byte [ebp + 0xa]
push 3
movsx ecx, byte [ecx + str.cw]
movzx ebx, byte [ebx + str.cw]
shl ecx, 8
xor ecx, ebx
xor ebx, ebx
mov bl, ah
and eax, 0xff
shl ecx, 8
movzx ebx, byte [ebx + str.cw]
movzx eax, byte [eax + str.cw]
xor ecx, ebx
shl ecx, 8
xor ecx, eax
lea eax, [esi + 0x428]
xor dword [esi + 0x424], ecx
pop ecx
mov ebx, dword [eax - 4]
xor dword [eax], ebx
add eax, 4
dec ecx
jne 0x403d95
and dword [ebp + 8], 0
test edx, edx
jle 0x403df4
lea ecx, [esi + 0x414]
cmp dword [ebp + 0xc], edi
jge 0x403dfd
mov eax, dword [ebp + 0xc]
mov ebx, dword [ecx]
cdq
idiv dword [ebp + 0x10]
mov edi, eax
mov eax, dword [ebp + 0xc]
cdq
idiv dword [ebp + 0x10]
lea eax, [edx + edi*8]
mov dword [esi + eax*4 + 8], ebx
mov eax, dword [esi + 0x3d0]
sub eax, edi
inc dword [ebp + 8]
mov edi, dword [ebp - 8]
lea eax, [edx + eax*8]
mov edx, dword [ecx]
add ecx, 4
inc dword [ebp + 0xc]
mov dword [esi + eax*4 + 0x1e8], edx
mov edx, dword [ebp - 4]
cmp dword [ebp + 8], edx
jl 0x403dae
cmp dword [ebp + 0xc], edi
jl 0x403cae
push 1
pop eax
cmp dword [esi + 0x3d0], eax
mov dword [ebp + 0x14], eax
jle 0x403e6c
lea eax, [esi + 0x208]
mov dword [ebp + 0xc], eax
mov ecx, dword [ebp + 0x10]
test ecx, ecx
jle 0x403e5a
mov edi, dword [ebp + 0xc]
mov eax, dword [edi]
xor edx, edx
mov dword [ebp + 8], eax
xor ebx, ebx
mov dl, byte [ebp + 0xb]
mov bl, byte [ebp + 0xa]
mov edx, dword [edx*4 + 0x41bbf8]
xor edx, dword [ebx*4 + 0x41bff8]
xor ebx, ebx
mov bl, ah
and eax, 0xff
xor edx, dword [ebx*4 + 0x41c3f8]
xor edx, dword [eax*4 + 0x41c7f8]
mov dword [edi], edx
add edi, 4
dec ecx
jne 0x403e1e
inc dword [ebp + 0x14]
add dword [ebp + 0xc], 0x20
mov eax, dword [ebp + 0x14]
cmp eax, dword [esi + 0x3d0]
jl 0x403e14
mov byte [esi + 4], 1
pop edi
pop esi
pop ebx
leave
ret 0x10