Function at 0x504f10
Capabilities:
Encrypt data using rc4 prga

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x24
mov dword [ebp - 0x10], 0
mov eax, dword [ebp + 0x14]
mov ecx, dword [eax]
and ecx, 7
mov dword [ebp - 0xc], ecx
cmp dword [ebp + 0xc], 5
jae 0x504f35
xor eax, eax
jmp 0x505187
mov edx, dword [ebp + 0xc]
sub edx, 4
mov dword [ebp + 0xc], edx
mov eax, dword [ebp + 0x10]
add eax, 5
mov dword [ebp + 0x10], eax
mov ecx, dword [ebp + 8]
add ecx, dword [ebp - 0x10]
mov dword [ebp - 4], ecx
mov edx, dword [ebp + 8]
add edx, dword [ebp + 0xc]
mov dword [ebp - 0x1c], edx
jmp 0x504f64
mov eax, dword [ebp - 4]
add eax, 1
mov dword [ebp - 4], eax
mov ecx, dword [ebp - 4]
cmp ecx, dword [ebp - 0x1c]
jae 0x504f82
mov edx, dword [ebp - 4]
movzx eax, byte [edx]
and eax, 0xfe
cmp eax, 0xe8
jne 0x504f80
jmp 0x504f82
jmp 0x504f5b
mov ecx, dword [ebp - 4]
sub ecx, dword [ebp + 8]
sub ecx, dword [ebp - 0x10]
mov dword [ebp - 0x14], ecx
mov edx, dword [ebp - 4]
sub edx, dword [ebp + 8]
mov dword [ebp - 0x10], edx
mov eax, dword [ebp - 4]
cmp eax, dword [ebp - 0x1c]
jb 0x504fc9
cmp dword [ebp - 0x14], 2
jbe 0x504fae
mov dword [ebp - 0x20], 0
jmp 0x504fb9
mov edx, dword [ebp - 0xc]
mov ecx, dword [ebp - 0x14]
shr edx, cl
mov dword [ebp - 0x20], edx
mov eax, dword [ebp + 0x14]
mov ecx, dword [ebp - 0x20]
mov dword [eax], ecx
mov eax, dword [ebp - 0x10]
jmp 0x505187
cmp dword [ebp - 0x14], 2
jbe 0x504fd8
mov dword [ebp - 0xc], 0
jmp 0x505026
mov edx, dword [ebp - 0xc]
mov ecx, dword [ebp - 0x14]
shr edx, cl
mov dword [ebp - 0xc], edx
cmp dword [ebp - 0xc], 0
je 0x505026
cmp dword [ebp - 0xc], 4
ja 0x50500d
cmp dword [ebp - 0xc], 3
je 0x50500d
mov eax, dword [ebp - 0xc]
shr eax, 1
mov ecx, dword [ebp - 4]
movzx edx, byte [ecx + eax + 1]
add edx, 1
and edx, 0xfe
jne 0x505026
mov eax, dword [ebp - 0xc]
shr eax, 1
or eax, 4
mov dword [ebp - 0xc], eax
mov ecx, dword [ebp - 0x10]
add ecx, 1
mov dword [ebp - 0x10], ecx
jmp 0x504f47
mov edx, 1
shl edx, 2
mov eax, dword [ebp - 4]
movzx ecx, byte [eax + edx]
add ecx, 1
and ecx, 0xfe
jne 0x50516e
mov edx, 1
shl edx, 2
mov eax, dword [ebp - 4]
movzx ecx, byte [eax + edx]
shl ecx, 0x18
mov edx, 1
imul eax, edx, 3
mov edx, dword [ebp - 4]
movzx eax, byte [edx + eax]
shl eax, 0x10
or ecx, eax
mov edx, 1
shl edx, 1
mov eax, dword [ebp - 4]
movzx edx, byte [eax + edx]
shl edx, 8
or ecx, edx
mov eax, 1
shl eax, 0
mov edx, dword [ebp - 4]
movzx eax, byte [edx + eax]
or ecx, eax
mov dword [ebp - 8], ecx
mov ecx, dword [ebp + 0x10]
add ecx, dword [ebp - 0x10]
mov dword [ebp - 0x18], ecx
mov edx, dword [ebp - 0x10]
add edx, 5
mov dword [ebp - 0x10], edx
cmp dword [ebp + 0x18], 0
je 0x5050b4
mov eax, dword [ebp - 8]
add eax, dword [ebp - 0x18]
mov dword [ebp - 8], eax
jmp 0x5050bd
mov ecx, dword [ebp - 8]
sub ecx, dword [ebp - 0x18]
mov dword [ebp - 8], ecx
cmp dword [ebp - 0xc], 0
je 0x505119
mov edx, dword [ebp - 0xc]
and edx, 6
shl edx, 2
mov dword [ebp - 0x24], edx
mov eax, dword [ebp - 8]
mov ecx, dword [ebp - 0x24]
shr eax, cl
movzx ecx, al
add ecx, 1
and ecx, 0xfe
jne 0x505112
mov edx, 0x100
mov ecx, dword [ebp - 0x24]
shl edx, cl
sub edx, 1
xor edx, dword [ebp - 8]
mov dword [ebp - 8], edx
cmp dword [ebp + 0x18], 0
je 0x505109
mov eax, dword [ebp - 8]
add eax, dword [ebp - 0x18]
mov dword [ebp - 8], eax
jmp 0x505112
mov ecx, dword [ebp - 8]
sub ecx, dword [ebp - 0x18]
mov dword [ebp - 8], ecx
mov dword [ebp - 0xc], 0
mov edx, 1
shl edx, 0
mov eax, dword [ebp - 4]
mov cl, byte [ebp - 8]
mov byte [eax + edx], cl
mov edx, dword [ebp - 8]
shr edx, 8
mov eax, 1
shl eax, 1
mov ecx, dword [ebp - 4]
mov byte [ecx + eax], dl
mov edx, dword [ebp - 8]
shr edx, 0x10
mov eax, 1
imul ecx, eax, 3
mov eax, dword [ebp - 4]
mov byte [eax + ecx], dl
mov ecx, dword [ebp - 8]
shr ecx, 0x18
and ecx, 1
xor edx, edx
sub edx, ecx
mov eax, 1
shl eax, 2
mov ecx, dword [ebp - 4]
mov byte [ecx + eax], dl
jmp 0x505182
mov edx, dword [ebp - 0xc]
shr edx, 1
or edx, 4
mov dword [ebp - 0xc], edx
mov eax, dword [ebp - 0x10]
add eax, 1
mov dword [ebp - 0x10], eax
jmp 0x504f47
mov esp, ebp
pop ebp
ret