Function at 0x403890
Capabilities:
Encode data using xor

Disassembly:
sub esp, 0x3c
push ebx
push ebp
push esi
mov esi, dword [esp + 0x50]
mov eax, esi
push edi
cdq
and edx, 0xf
mov dword [esp + 0x2c], 0x12345678
add eax, edx
mov dword [esp + 0x30], 0x56785678
mov edi, eax
mov dword [esp + 0x34], 0x9abc5678
sar edi, 4
and esi, 0x8000000f
mov dword [esp + 0x38], 0xdeff5678
mov dword [esp + 0x54], edi
jns 0x4038d9
dec esi
or esi, 0xfffffff0
inc esi
mov dword [esp + 0x18], esi
jne 0x403992
test edi, edi
jle 0x403c07
mov eax, dword [esp + 0x58]
mov esi, dword [esp + 0x50]
sub esi, eax
mov ebp, eax
mov dword [esp + 0x10], esi
mov dword [esp + 0x50], edi
jmp 0x403905
mov esi, dword [esp + 0x10]
lea ecx, [esp + 0x1c]
add esi, ebp
mov edi, 4
xor eax, eax
mov ebx, dword [ecx]
xor edx, edx
mov dl, byte [esi + eax]
shl ebx, 8
xor edx, ebx
inc eax
cmp eax, 4
mov dword [ecx], edx
jl 0x403912
add ecx, 4
add esi, 4
dec edi
jne 0x403910
mov eax, dword [esp + 0x5c]
lea ecx, [esp + 0x3c]
push eax
lea edx, [esp + 0x30]
push ecx
push edx
call fcn.00401280
add esp, 0xc
mov edi, ebp
xor ebp, ebp
mov esi, dword [esp + ebp + 0x3c]
mov eax, dword [esp + ebp + 0x1c]
xor esi, eax
xor eax, eax
mov dword [esp + ebp + 0x2c], esi
mov ecx, 0x18
mov edx, esi
sub ecx, eax
add eax, 8
shr edx, cl
inc edi
cmp eax, 0x20
mov byte [edi - 1], dl
jl 0x40395a
add ebp, 4
cmp ebp, 0x10
jl 0x40394a
mov eax, dword [esp + 0x50]
mov ebp, edi
dec eax
mov dword [esp + 0x50], eax
jne 0x403901
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x3c
ret
test edi, edi
jle 0x403a41
mov eax, dword [esp + 0x58]
mov esi, dword [esp + 0x50]
sub esi, eax
mov ebp, eax
mov dword [esp + 0x10], esi
mov dword [esp + 0x14], edi
jmp 0x4039b4
mov esi, dword [esp + 0x10]
lea ecx, [esp + 0x1c]
add esi, ebp
mov edi, 4
xor eax, eax
mov ebx, dword [ecx]
xor edx, edx
mov dl, byte [esi + eax]
shl ebx, 8
xor edx, ebx
inc eax
cmp eax, 4
mov dword [ecx], edx
jl 0x4039c1
add ecx, 4
add esi, 4
dec edi
jne 0x4039bf
mov eax, dword [esp + 0x5c]
lea ecx, [esp + 0x3c]
push eax
lea edx, [esp + 0x30]
push ecx
push edx
call fcn.00401280
add esp, 0xc
mov edi, ebp
xor ebp, ebp
mov esi, dword [esp + ebp + 0x3c]
mov eax, dword [esp + ebp + 0x1c]
xor esi, eax
xor eax, eax
mov dword [esp + ebp + 0x2c], esi
mov ecx, 0x18
mov edx, esi
sub ecx, eax
add eax, 8
shr edx, cl
inc edi
cmp eax, 0x20
mov byte [edi - 1], dl
jl 0x403a09
add ebp, 4
cmp ebp, 0x10
jl 0x4039f9
mov eax, dword [esp + 0x14]
mov ebp, edi
dec eax
mov dword [esp + 0x14], eax
jne 0x4039b0
mov edi, dword [esp + 0x54]
mov esi, dword [esp + 0x18]
mov eax, esi
cdq
and edx, 3
add eax, edx
mov ebx, eax
sar ebx, 2
and esi, 0x80000003
jns 0x403a5b
dec esi
or esi, 0xfffffffc
inc esi
mov dword [esp + 0x14], esi
jne 0x403afb
test ebx, ebx
jle 0x403a9d
mov eax, dword [esp + 0x50]
mov ecx, edi
shl ecx, 4
lea esi, [esp + 0x1c]
add ecx, eax
mov edi, ebx
xor eax, eax
mov ebp, dword [esi]
xor edx, edx
mov dl, byte [ecx + eax]
shl ebp, 8
xor edx, ebp
inc eax
cmp eax, 4
mov dword [esi], edx
jl 0x403a7c
add esi, 4
add ecx, 4
dec edi
jne 0x403a7a
mov edi, dword [esp + 0x54]
mov eax, dword [esp + 0x5c]
lea ecx, [esp + 0x3c]
push eax
lea edx, [esp + 0x30]
push ecx
push edx
call fcn.00401280
add esp, 0xc
xor ebp, ebp
test ebx, ebx
jle 0x403c07
mov eax, dword [esp + 0x58]
shl edi, 4
add edi, eax
mov esi, dword [esp + ebp*4 + 0x3c]
mov eax, dword [esp + ebp*4 + 0x1c]
xor esi, eax
xor eax, eax
mov dword [esp + ebp*4 + 0x2c], esi
mov ecx, 0x18
mov edx, esi
sub ecx, eax
add eax, 8
shr edx, cl
inc edi
cmp eax, 0x20
mov byte [edi - 1], dl
jl 0x403ad7
inc ebp
cmp ebp, ebx
jl 0x403ac7
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x3c
ret
test ebx, ebx
jle 0x403b37
mov eax, dword [esp + 0x50]
mov ecx, edi
shl ecx, 4
lea esi, [esp + 0x1c]
add ecx, eax
mov edi, ebx
xor eax, eax
mov ebp, dword [esi]
xor edx, edx
mov dl, byte [ecx + eax]
shl ebp, 8
xor edx, ebp
inc eax
cmp eax, 4
mov dword [esi], edx
jl 0x403b12
add esi, 4
add ecx, 4
dec edi
jne 0x403b10
mov edi, dword [esp + 0x54]
mov esi, dword [esp + 0x14]
xor eax, eax
test esi, esi
jle 0x403b5e
mov edx, dword [esp + 0x50]
lea ecx, [ebx + edi*4]
lea ebp, [edx + ecx*4]
mov edx, dword [esp + ebx*4 + 0x1c]
xor ecx, ecx
mov cl, byte [eax + ebp]
shl edx, 8
xor ecx, edx
inc eax
cmp eax, esi
mov dword [esp + ebx*4 + 0x1c], ecx
jl 0x403b47
lea eax, [esi*8]
mov ecx, 0x20
sub ecx, eax
mov eax, dword [esp + ebx*4 + 0x1c]
shl eax, cl
mov ecx, dword [esp + 0x5c]
lea edx, [esp + 0x3c]
push ecx
push edx
mov dword [esp + ebx*4 + 0x24], eax
lea eax, [esp + 0x34]
push eax
call fcn.00401280
add esp, 0xc
xor ebp, ebp
test ebx, ebx
jle 0x403bc8
mov eax, dword [esp + 0x58]
shl edi, 4
add edi, eax
mov esi, dword [esp + ebp*4 + 0x3c]
mov eax, dword [esp + ebp*4 + 0x1c]
xor esi, eax
xor eax, eax
mov dword [esp + ebp*4 + 0x2c], esi
mov ecx, 0x18
mov edx, esi
sub ecx, eax
add eax, 8
shr edx, cl
inc edi
cmp eax, 0x20
mov byte [edi - 1], dl
jl 0x403bac
inc ebp
cmp ebp, ebx
jl 0x403b9c
mov edi, dword [esp + ebx*4 + 0x3c]
mov edx, dword [esp + ebx*4 + 0x1c]
xor edi, edx
mov edx, dword [esp + 0x14]
xor eax, eax
mov dword [esp + ebx*4 + 0x2c], edi
test edx, edx
jle 0x403c07
mov ecx, dword [esp + 0x54]
xor esi, esi
lea ecx, [ebx + ecx*4]
mov ebx, dword [esp + 0x58]
lea ebp, [ebx + ecx*4]
mov ecx, 0x18
mov ebx, edi
sub ecx, esi
add esi, 8
shr ebx, cl
inc eax
cmp eax, edx
mov byte [eax + ebp - 1], bl
jl 0x403bf0
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x3c
ret