Function at 0x505780
Capabilities:
Encode data using xor

Disassembly:
push ebp
mov ebp, esp
push ebx
push edi
push esi
and esp, 0xfffffff0
sub esp, 0x90
mov ecx, dword [ebp + 0x14]
xor eax, eax
cmp ecx, 0x30
ja 0x5059f8
mov eax, dword [ebp + 0xc]
mov edi, dword [ebp + 8]
movups xmm0, xmmword [eax + 0x20]
movaps xmmword [esp + 0x20], xmm0
movups xmm0, xmmword [eax]
movups xmm1, xmmword [eax + 0x10]
movaps xmmword [esp + 0x10], xmm1
movaps xmmword [esp], xmm0
test ecx, ecx
je 0x50584c
mov eax, dword [ebp + 0x10]
xor edx, edx
cmp ecx, 8
jb 0x505840
xor edx, edx
cmp ecx, 0x10
jb 0x505814
mov edx, ecx
and edx, 0xfffffff0
movups xmm0, xmmword [eax]
xorps xmm0, xmmword [esp]
movaps xmmword [esp], xmm0
cmp edx, 0x10
je 0x50580b
movups xmm0, xmmword [eax + 0x10]
xorps xmm0, xmmword [esp + 0x10]
movaps xmmword [esp + 0x10], xmm0
cmp edx, 0x20
je 0x50580b
movups xmm0, xmmword [eax + 0x20]
xorps xmm0, xmmword [esp + 0x20]
movaps xmmword [esp + 0x20], xmm0
cmp edx, ecx
je 0x50584c
test cl, 8
je 0x505840
mov esi, edx
mov edx, ecx
and edx, 0xfffffff8
nop dword [eax + eax]
movsd xmm0, qword [eax + esi]
movsd xmm1, qword [esp + esi]
xorps xmm1, xmm0
movlps qword [esp + esi], xmm1
add esi, 8
cmp edx, esi
jne 0x505820
cmp edx, ecx
je 0x50584c
nop dword [eax]
movzx ebx, byte [eax + edx]
xor byte [esp + edx], bl
inc edx
cmp ecx, edx
jne 0x505840
movaps xmm0, xmmword [esp]
xorps xmm0, xmmword [0x5959b0]
movdqa xmm1, xmmword [esp + 0x10]
movaps xmmword [esp], xmm0
pxor xmm1, xmmword [str._M_kn_aN]
movdqa xmmword [esp + 0x10], xmm1
movaps xmm0, xmmword [esp + 0x20]
xorps xmm0, xmmword [0x5959d0]
movaps xmmword [esp + 0x20], xmm0
mov esi, edi
mov dword [edi + 0xf0], 0xe
movaps xmm0, xmmword [esp]
movaps xmmword [esp + 0x50], xmm0
movups xmmword [edi], xmm0
movaps xmm0, xmmword [esp + 0x10]
movaps xmmword [esp + 0x40], xmm0
movups xmmword [edi + 0x10], xmm0
movaps xmm0, xmmword [esp + 0x50]
movaps xmmword [esp + 0x70], xmm0
mov edi, 0x30
mov ebx, 0x596aee
movaps xmm0, xmmword [esp + 0x40]
movaps xmmword [esp + 0x60], xmm0
nop word cs:[eax + eax]
xorps xmm0, xmm0
movaps xmmword [esp + 0x30], xmm0
lea ecx, [esp + 0x30]
lea edx, [esp + 0x40]
call fcn.00512de0
movzx eax, byte [ebx]
movd xmm1, eax
pxor xmm1, xmmword [esp + 0x70]
movdqa xmm0, xmmword [esp + 0x30]
movdqa xmm2, xmm0
psrld xmm2, 8
pslld xmm0, 0x18
por xmm0, xmm2
psrldq xmm0, 0xc
pxor xmm0, xmm1
movdqa xmm1, xmm0
pslldq xmm1, 4
movdqa xmm2, xmm0
pslldq xmm2, 8
pxor xmm2, xmm1
movdqa xmm1, xmm0
pslldq xmm1, 0xc
pxor xmm1, xmm2
pxor xmm1, xmm0
movdqa xmmword [esp + 0x50], xmm1
movaps xmm0, xmmword [esp + 0x50]
movups xmmword [esi + edi - 0x10], xmm0
cmp edi, 0xf0
je 0x5059bf
movdqa xmmword [esp + 0x70], xmm1
lea ecx, [esp + 0x30]
lea edx, [esp + 0x50]
call fcn.00512de0
movdqa xmm0, xmmword [esp + 0x30]
psrldq xmm0, 0xc
movdqa xmm2, xmmword [esp + 0x60]
pxor xmm2, xmm0
movdqa xmm0, xmm2
pslldq xmm0, 4
movdqa xmm1, xmm2
pslldq xmm1, 8
pxor xmm1, xmm0
movdqa xmm0, xmm2
pslldq xmm0, 0xc
pxor xmm0, xmm1
pxor xmm2, xmm0
movdqa xmmword [esp + 0x60], xmm2
movdqa xmmword [esp + 0x40], xmm2
movaps xmm0, xmmword [esp + 0x40]
movups xmmword [esi + edi], xmm0
add edi, 0x20
inc ebx
jmp 0x5058d0
mov dword [esi + 0xf4], fcn.004cf490
mov dword [esi + 0xf8], 0x4d1780
movaps xmm0, xmmword [esp + 0x20]
movups xmmword [esi + 0xfc], xmm0
mov dword [esi + 0x114], 0
mov dword [esi + 0x110], 1
mov eax, 1
lea esp, [ebp - 0xc]
pop esi
pop edi
pop ebx
pop ebp
ret