Function at 0x421840
Capabilities:
Encrypt data using rc4 prga

Disassembly:
push ebx
mov ebx, esp
sub esp, 8
and esp, 0xfffffff8
add esp, 4
push ebp
mov ebp, dword [ebx + 4]
mov dword [esp + 4], ebp
mov ebp, esp
sub esp, 0x38
mov eax, dword [0x47d040]
xor eax, ebp
mov dword [ebp - 4], eax
push esi
mov esi, ecx
mov ecx, dword [ebx + 0xc]
mov dword [ebp - 0x24], esi
push edi
mov edi, dword [ebx + 8]
cmp ecx, 3
jl 0x421bed
test byte [esi + 0x24], 4
mov eax, dword [esi + 0x28]
movss xmm0, dword [eax]
movss dword [ebp - 0x28], xmm0
movss xmm0, dword [eax + 4]
movss dword [ebp - 0x2c], xmm0
je 0x421b54
mov eax, dword [ebx + 0x10]
and eax, 0xffffff
mov dword [ebp - 0x34], eax
lea eax, [ecx + ecx]
push eax
mov dword [ebp - 0x38], eax
lea eax, [ecx*8 - 6]
add eax, ecx
mov ecx, esi
push eax
call fcn.004208f0
mov eax, dword [esi + 0x30]
mov edi, dword [ebx + 0xc]
movzx edx, ax
mov dword [ebp - 0x1c], eax
lea ecx, [eax + 1]
mov dword [ebp - 8], edx
mov dword [ebp - 0x14], ecx
mov ecx, 2
mov dword [ebp - 0xc], ecx
nop dword [eax]
mov eax, dword [esi + 0x38]
mov word [eax], dx
lea edx, [edx + ecx*2]
mov eax, dword [esi + 0x38]
lea ecx, [edx - 2]
mov word [eax + 2], cx
mov eax, dword [esi + 0x38]
mov ecx, dword [ebp - 0xc]
inc ecx
mov dword [ebp - 0xc], ecx
mov word [eax + 4], dx
add dword [esi + 0x38], 6
mov edx, dword [ebp - 8]
cmp ecx, edi
jl 0x4218e0
lea eax, [edi*8]
call fcn.004644b0
movss xmm4, dword [0x475a9c]
lea eax, [edi - 1]
mov edi, dword [ebx + 8]
lea ecx, [eax*8]
xor edx, edx
mov dword [ebp - 0x10], eax
mov eax, dword [ebx + 0xc]
xorps xmm5, xmm5
mov dword [ebp - 8], edx
mov dword [ebp - 0x20], ecx
nop
movss xmm2, dword [edi + edx*8]
lea esi, [edx*8]
movss xmm1, dword [edi + edx*8 + 4]
subss xmm2, dword [ecx + edi]
subss xmm1, dword [ecx + edi + 4]
movaps xmm0, xmm2
movss dword [ebp - 0x30], xmm2
movaps xmm3, xmm1
mulss xmm0, xmm2
mulss xmm3, xmm1
movss dword [ebp - 0x18], xmm1
addss xmm3, xmm0
comiss xmm3, xmm5
jbe 0x4219c5
cvtps2pd xmm0, xmm3
xorps xmm1, xmm1
ucomisd xmm1, xmm0
ja 0x421990
sqrtsd xmm0, xmm0
jmp 0x421995
call fcn.004654d0
movss xmm4, dword [0x475a9c]
xorps xmm5, xmm5
cvtsd2ss xmm0, xmm0
mov eax, dword [ebx + 0xc]
mov ecx, dword [ebp - 0x20]
mov edx, dword [ebp - 8]
movaps xmm1, xmm4
movss xmm2, dword [ebp - 0x30]
divss xmm1, xmm0
movaps xmm0, xmm1
mulss xmm1, dword [ebp - 0x18]
mulss xmm2, xmm0
xorps xmm2, xmmword [0x476040]
mov edi, esp
inc edx
mov dword [ebp - 8], edx
movss dword [ecx + edi], xmm1
movss dword [ecx + edi + 4], xmm2
mov ecx, esi
mov edi, dword [ebx + 8]
mov dword [ebp - 0x20], ecx
cmp edx, eax
jl 0x421940
mov eax, dword [ebp - 0x1c]
lea edx, [edi + 4]
movss xmm5, dword [0x475a68]
movzx eax, ax
mov dword [ebp - 0x1c], eax
mov eax, esp
mov ecx, eax
mov dword [ebp - 8], edx
sub ecx, edi
xor edi, edi
mov dword [ebp - 0x18], ecx
nop
movss xmm2, dword [eax + edi*8]
movss xmm3, dword [edx + ecx]
mov esi, dword [ebp - 0x10]
mov ecx, esi
addss xmm3, dword [eax + ecx*8 + 4]
addss xmm2, dword [eax + esi*8]
mov esi, dword [ebp - 0x24]
mov ecx, dword [ebx + 0x10]
mulss xmm3, xmm5
mov eax, dword [esi + 0x34]
mulss xmm2, xmm5
movaps xmm1, xmm3
mulss xmm1, xmm3
movaps xmm0, xmm2
mulss xmm0, xmm2
addss xmm1, xmm0
movaps xmm0, xmm5
maxss xmm0, xmm1
divss xmm4, xmm0
movss xmm0, dword [edx - 4]
movaps xmm1, xmm4
mulss xmm4, xmm3
mulss xmm1, xmm2
movss xmm2, dword [ebp - 0x2c]
mulss xmm4, xmm5
mulss xmm1, xmm5
subss xmm0, xmm1
movss dword [eax], xmm0
movss xmm0, dword [edx]
mov eax, dword [esi + 0x34]
subss xmm0, xmm4
movss dword [eax + 4], xmm0
mov eax, dword [esi + 0x34]
movss xmm0, dword [ebp - 0x28]
movss dword [eax + 8], xmm0
movss dword [eax + 0xc], xmm2
mov eax, dword [esi + 0x34]
mov dword [eax + 0x10], ecx
addss xmm1, dword [edx - 4]
mov eax, dword [esi + 0x34]
mov ecx, dword [ebp - 0x34]
movss dword [eax + 0x14], xmm1
addss xmm4, dword [edx]
mov eax, dword [esi + 0x34]
movss dword [eax + 0x18], xmm4
mov eax, dword [esi + 0x34]
movss dword [eax + 0x1c], xmm0
movss dword [eax + 0x20], xmm2
mov eax, dword [esi + 0x34]
mov dword [eax + 0x24], ecx
mov eax, dword [esi + 0x38]
add dword [esi + 0x34], 0x28
mov ecx, dword [ebp - 0x1c]
lea edx, [ecx + edi*2]
mov word [eax], dx
mov eax, dword [ebp - 0x10]
lea ecx, [ecx + eax*2]
mov eax, dword [esi + 0x38]
mov esi, dword [ebp - 0x14]
mov word [eax + 2], cx
mov eax, dword [ebp - 0x10]
movzx ecx, si
mov esi, dword [ebp - 0x24]
mov dword [ebp - 0x10], edi
lea ecx, [ecx + eax*2]
mov eax, dword [esi + 0x38]
mov word [eax + 4], cx
mov eax, dword [esi + 0x38]
mov word [eax + 6], cx
mov ecx, dword [ebp - 0x14]
movzx eax, cx
lea ecx, [eax + edi*2]
mov eax, dword [esi + 0x38]
inc edi
mov word [eax + 8], cx
mov eax, dword [esi + 0x38]
mov word [eax + 0xa], dx
mov edx, dword [ebp - 8]
add dword [esi + 0x38], 0xc
add edx, 8
mov dword [ebp - 8], edx
mov eax, esp
movss xmm4, dword [0x475a9c]
mov ecx, dword [ebp - 0x18]
cmp edi, dword [ebx + 0xc]
jl 0x421a10
mov eax, dword [ebp - 0x38]
jmp 0x421be7
push ecx
add ecx, 0xfffffffe
lea eax, [ecx + ecx*2]
mov ecx, esi
push eax
call fcn.004208f0
mov eax, dword [ebx + 0xc]
movss xmm0, dword [ebp - 0x28]
movss xmm1, dword [ebp - 0x2c]
mov dword [ebp - 0x14], eax
mov eax, dword [esi + 0x34]
lea edi, [edi + 8]
mov ecx, dword [edi - 8]
mov edx, dword [edi - 4]
mov dword [eax], ecx
mov ecx, dword [ebx + 0x10]
mov dword [eax + 4], edx
mov eax, dword [esi + 0x34]
movss dword [eax + 8], xmm0
movss dword [eax + 0xc], xmm1
mov eax, dword [esi + 0x34]
mov dword [eax + 0x10], ecx
add dword [esi + 0x34], 0x14
sub dword [ebp - 0x14], 1
jne 0x421b73
mov edi, 2
nop dword [eax]
mov ecx, dword [esi + 0x38]
mov ax, word [esi + 0x30]
movzx edx, di
inc edi
mov word [ecx], ax
movzx ecx, word [esi + 0x30]
mov eax, dword [esi + 0x38]
dec cx
add cx, dx
mov word [eax + 2], cx
mov eax, dword [esi + 0x38]
movzx ecx, word [esi + 0x30]
add cx, dx
mov word [eax + 4], cx
add dword [esi + 0x38], 6
mov eax, dword [ebx + 0xc]
cmp edi, eax
jl 0x421bb0
movzx eax, ax
add dword [esi + 0x30], eax
lea esp, [ebp - 0x40]
pop edi
pop esi
mov ecx, dword [ebp - 4]
xor ecx, ebp
call fcn.0044096c
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret 0xc