Function at 0x406540
Capabilities:
Encrypt data using rc4 prga

Disassembly:
push ebp
push ebx
push edi
push esi
sub esp, 0x10
mov esi, ecx
test edx, edx
je 0x406555
push esi
call fcn.00406840
jmp 0x40655b
push esi
call fcn.00406cc0
add esp, 4
lea ebp, [esi + 0x9272]
cmp ebp, dword [esi + 0x28]
jae 0x4067c3
mov ebx, 1
jmp 0x40658e
mov ebx, dword [esp]
shr ebx, 1
cmp ebp, dword [esi + 0x28]
jae 0x4067c9
cmp ebx, 1
jne 0x40659e
movzx ebx, byte [ebp]
inc ebp
or ebx, 0x100
test bl, 1
jne 0x406610
movzx edi, byte [ebp]
movzx edx, word [esi + edi*2 + 0x8852]
mov eax, dword [esi + 0x44]
mov ecx, eax
shl edx, cl
inc ebp
movzx ecx, byte [esi + edi + 0x8f12]
or edx, dword [esi + 0x48]
mov dword [esi + 0x48], edx
add ecx, eax
mov dword [esi + 0x44], ecx
cmp ecx, 8
jae 0x4065f1
jmp 0x406583
shr edx, 8
mov dword [esi + 0x48], edx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x406583
mov eax, dword [esi + 0x30]
cmp eax, dword [esi + 0x34]
jae 0x4065e0
lea ecx, [eax + 1]
mov dword [esi + 0x30], ecx
mov byte [eax], dl
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x4065e0
movzx eax, byte [ebp]
mov edi, eax
movzx eax, word [eax + eax + 0x442bea]
movzx edx, word [esi + eax*2 + 0x8852]
mov ecx, dword [esi + 0x44]
shl edx, cl
movzx eax, byte [esi + eax + 0x8f12]
add eax, ecx
movzx ecx, byte [ebp + 1]
mov dword [esp + 4], ecx
or edx, dword [esi + 0x48]
mov dword [esp + 0xc], ebp
movzx ebp, byte [ebp + 2]
mov dword [esi + 0x48], edx
mov dword [esi + 0x44], eax
cmp eax, 8
jae 0x4066b1
mov dword [esp], ebx
movzx ebx, byte [edi + 0x442e44]
and edi, dword [ebx*4 + 0x442e00]
mov ecx, eax
shl edi, cl
or edi, edx
mov edx, edi
mov dword [esi + 0x48], edi
add eax, ebx
mov dword [esi + 0x44], eax
cmp eax, 8
jae 0x4066e1
mov dword [esp + 8], edx
mov edx, ebp
shl edx, 8
add edx, dword [esp + 4]
cmp edx, 0x200
jb 0x406700
lea ecx, [ebp + 0x442b6a]
lea ebp, [ebp + 0x443144]
jmp 0x40670c
shr edx, 8
mov dword [esi + 0x48], edx
add eax, 0xfffffff8
mov dword [esi + 0x44], eax
cmp eax, 7
jbe 0x406653
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x4066a0
lea eax, [ecx + 1]
mov dword [esi + 0x30], eax
mov byte [ecx], dl
mov eax, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x4066a0
shr edx, 8
mov dword [esi + 0x48], edx
add eax, 0xfffffff8
mov dword [esi + 0x44], eax
cmp eax, 7
jbe 0x406679
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x4066d0
lea eax, [ecx + 1]
mov dword [esi + 0x30], eax
mov byte [ecx], dl
mov eax, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x4066d0
lea ebp, [edx + 0x442f44]
lea ecx, [edx + 0x44296a]
movzx edi, byte [ecx]
movzx ebx, word [esi + edi*2 + 0x8a92]
mov ecx, eax
shl ebx, cl
or ebx, dword [esp + 8]
movzx ecx, byte [esi + edi + 0x9032]
add ecx, eax
movzx eax, byte [ebp]
mov dword [esi + 0x48], ebx
mov dword [esi + 0x44], ecx
cmp ecx, 8
jae 0x4067aa
mov ebp, dword [esp + 0xc]
add ebp, 3
and edx, dword [eax*4 + 0x442e00]
shl edx, cl
or edx, ebx
mov dword [esi + 0x48], edx
add ecx, eax
mov dword [esi + 0x44], ecx
cmp ecx, 8
jb 0x406580
mov ebx, dword [esp]
jmp 0x406775
shr edx, 8
mov dword [esi + 0x48], edx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x406583
mov eax, dword [esi + 0x30]
cmp eax, dword [esi + 0x34]
jae 0x406760
lea ecx, [eax + 1]
mov dword [esi + 0x30], ecx
mov byte [eax], dl
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x406760
shr ebx, 8
mov dword [esi + 0x48], ebx
mov edi, ecx
xor edi, 8
and ecx, 0xfffffff7
add ecx, ecx
sub ecx, edi
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x406738
mov ebp, dword [esi + 0x30]
cmp ebp, dword [esi + 0x34]
jae 0x406790
lea ecx, [ebp + 1]
mov dword [esi + 0x30], ecx
mov byte [ebp], bl
mov ecx, dword [esi + 0x44]
mov ebx, dword [esi + 0x48]
jmp 0x406790
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
movzx eax, word [esi + 0x8a52]
movzx edi, byte [esi + 0x9012]
shl eax, cl
or eax, edx
mov dword [esi + 0x48], eax
add edi, ecx
mov dword [esi + 0x44], edi
cmp edi, 8
jae 0x40681a
mov ecx, dword [esi + 0x30]
xor eax, eax
cmp ecx, dword [esi + 0x34]
setb al
add esp, 0x10
pop esi
pop edi
pop ebx
pop ebp
ret
shr eax, 8
mov dword [esi + 0x48], eax
mov ecx, edi
not ecx
and ecx, 8
and edi, 0xfffffff7
sub edi, ecx
mov dword [esi + 0x44], edi
cmp edi, 7
jbe 0x4067e8
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x406800
lea edx, [ecx + 1]
mov dword [esi + 0x30], edx
mov byte [ecx], al
mov edi, dword [esi + 0x44]
mov eax, dword [esi + 0x48]
jmp 0x406800