Function at 0x42fe00
Capabilities:
Encode data using add xor sub operations
Encode data using xor
Encrypt data using aes

Disassembly:
mov edx, dword [esp + 8]
sub esp, 0x10
mov eax, dword [esp + 0x14]
mov ecx, dword [edx]
xor dword [eax], ecx
mov ecx, dword [edx + 4]
xor dword [eax + 4], ecx
mov ecx, dword [edx + 8]
xor dword [eax + 8], ecx
mov ecx, dword [edx + 0xc]
xor dword [eax + 0xc], ecx
push ebx
push ebp
mov ebp, dword [esp + 0x24]
push esi
push edi
cmp ebp, 1
jle 0x42ff9f
add edx, 0x18
dec ebp
mov dword [esp + 0x18], edx
mov dword [esp + 0x1c], ebp
nop
movups xmm1, xmmword [eax]
movaps xmm0, xmm1
movd edx, xmm1
psrldq xmm0, 0xc
movd ecx, xmm0
movaps xmm0, xmm1
shr edx, 0x18
psrldq xmm0, 8
mov dword [esp + 0x10], ecx
movzx ecx, cl
mov ebp, dword [edx*4 + 0x569978]
movd dword [esp + 0x24], xmm1
xor ebp, dword [ecx*4 + 0x56a578]
movd ecx, xmm0
movaps xmm0, xmm1
psrldq xmm0, 6
mov dword [esp + 0x14], ecx
movzx ecx, ch
xor ebp, dword [ecx*4 + 0x56a178]
movd ecx, xmm0
movaps xmm0, xmm1
psrldq xmm0, 4
movd ebx, xmm0
movaps xmm0, xmm1
movzx ecx, cl
psrldq xmm0, 0xa
mov edx, ebx
shr edx, 0x18
xor ebp, dword [ecx*4 + 0x569d78]
mov ecx, dword [esp + 0x24]
movzx ecx, cl
mov dword [eax], ebp
mov edi, dword [edx*4 + 0x569978]
mov edx, dword [esp + 0x14]
xor edi, dword [ecx*4 + 0x56a578]
mov ecx, dword [esp + 0x10]
movzx ecx, ch
shr edx, 0x18
xor edi, dword [ecx*4 + 0x56a178]
movd ecx, xmm0
movaps xmm0, xmm1
psrldq xmm0, 0xe
psrldq xmm1, 2
movzx ecx, cl
xor edi, dword [ecx*4 + 0x569d78]
mov dword [eax + 4], edi
mov esi, dword [edx*4 + 0x569978]
mov edx, dword [esp + 0x10]
movzx ecx, bl
shr edx, 0x18
xor esi, dword [ecx*4 + 0x56a578]
mov ecx, dword [esp + 0x24]
movzx ecx, ch
xor esi, dword [ecx*4 + 0x56a178]
movd ecx, xmm0
movzx ecx, cl
xor esi, dword [ecx*4 + 0x569d78]
mov dword [eax + 8], esi
mov edx, dword [edx*4 + 0x569978]
movzx ecx, bh
mov ebx, dword [esp + 0x18]
xor edx, dword [ecx*4 + 0x56a178]
mov ecx, dword [esp + 0x14]
movzx ecx, cl
xor edx, dword [ecx*4 + 0x56a578]
movd ecx, xmm1
movzx ecx, cl
xor edx, dword [ecx*4 + 0x569d78]
mov dword [eax + 0xc], edx
mov ecx, dword [ebx - 8]
xor ecx, ebp
mov dword [eax], ecx
mov ecx, dword [ebx - 4]
xor ecx, edi
mov dword [eax + 4], ecx
mov ecx, dword [ebx]
xor ecx, esi
mov dword [eax + 8], ecx
mov ecx, dword [ebx + 4]
xor ecx, edx
mov dword [eax + 0xc], ecx
add ebx, 0x10
sub dword [esp + 0x1c], 1
mov dword [esp + 0x18], ebx
jne 0x42fe40
movups xmm1, xmmword [eax]
movaps xmm0, xmm1
movd edx, xmm1
psrldq xmm0, 0xc
movd ecx, xmm0
movaps xmm0, xmm1
shr edx, 0x18
psrldq xmm0, 8
mov dword [esp + 0x1c], ecx
movzx ecx, cl
mov ebp, dword [edx*4 + 0x567900]
movd dword [esp + 0x24], xmm1
xor ebp, dword [ecx*4 + str.cwko0]
movd ecx, xmm0
movaps xmm0, xmm1
psrldq xmm0, 6
mov dword [esp + 0x18], ecx
movzx ecx, ch
xor ebp, dword [ecx*4 + 0x568100]
movd ecx, xmm0
movaps xmm0, xmm1
psrldq xmm0, 4
movd ebx, xmm0
movaps xmm0, xmm1
movzx ecx, cl
psrldq xmm0, 0xa
mov edx, ebx
shr edx, 0x18
xor ebp, dword [ecx*4 + 0x567d00]
mov ecx, dword [esp + 0x24]
movzx ecx, cl
mov dword [eax], ebp
mov edi, dword [edx*4 + 0x567900]
mov edx, dword [esp + 0x18]
xor edi, dword [ecx*4 + str.cwko0]
mov ecx, dword [esp + 0x1c]
movzx ecx, ch
shr edx, 0x18
xor edi, dword [ecx*4 + 0x568100]
movd ecx, xmm0
movaps xmm0, xmm1
psrldq xmm0, 0xe
psrldq xmm1, 2
movzx ecx, cl
xor edi, dword [ecx*4 + 0x567d00]
mov dword [eax + 4], edi
mov esi, dword [edx*4 + 0x567900]
mov edx, dword [esp + 0x1c]
movzx ecx, bl
shr edx, 0x18
xor esi, dword [ecx*4 + str.cwko0]
mov ecx, dword [esp + 0x24]
movzx ecx, ch
xor esi, dword [ecx*4 + 0x568100]
movd ecx, xmm0
movzx ecx, cl
xor esi, dword [ecx*4 + 0x567d00]
mov ecx, dword [esp + 0x18]
movzx ecx, cl
mov dword [eax + 8], esi
mov edx, dword [edx*4 + 0x567900]
xor edx, dword [ecx*4 + str.cwko0]
movzx ecx, bh
mov ebx, dword [esp + 0x28]
xor edx, dword [ecx*4 + 0x568100]
movd ecx, xmm1
movzx ecx, cl
xor edx, dword [ecx*4 + 0x567d00]
mov ecx, dword [esp + 0x2c]
shl ecx, 4
mov dword [esp + 0x2c], ecx
mov dword [eax + 0xc], edx
mov ecx, dword [ecx + ebx]
xor ecx, ebp
mov ebp, dword [esp + 0x2c]
mov dword [eax], ecx
mov ecx, dword [ebx + ebp + 4]
xor ecx, edi
mov dword [eax + 4], ecx
mov ecx, dword [ebx + ebp + 8]
xor ecx, esi
pop edi
mov dword [eax + 8], ecx
mov ecx, dword [ebx + ebp + 0xc]
pop esi
xor ecx, edx
pop ebp
mov dword [eax + 0xc], ecx
pop ebx
add esp, 0x10
ret