Function at 0x404040
Capabilities:
Encrypt data using rc4 prga

Disassembly:
push ebp
push ebx
push edi
push esi
sub esp, 0x18
mov ebp, dword [ecx]
xor eax, eax
cmp byte [ebp], 0x22
jne 0x4042f1
mov esi, ebp
jmp 0x40406f
lea esi, [ebx + 2]
mov dword [ecx], esi
cmp byte [ebx + 2], 0
je 0x4042f1
mov ebx, esi
inc esi
mov dword [ecx], esi
movzx edi, byte [ebx + 1]
cmp edi, 0x5c
je 0x404060
test edi, edi
je 0x4042f1
cmp edi, 0x22
jne 0x40406f
mov dword [esp + 8], edx
add ebx, 2
mov dword [ecx], ebx
mov edi, ebp
sub ebx, ebp
lea eax, [ebx - 1]
push eax
call dword [0x4458a8]
add esp, 4
mov edx, eax
test eax, eax
je case.0x4040f7.35
mov esi, edx
add ebx, 0xfffffffe
je 0x404299
movzx eax, byte [edi + 1]
mov esi, edx
test al, al
je 0x404299
mov ebp, edi
inc ebp
mov esi, edx
mov dword [esp + 0xc], ebp
mov dword [esp], edx
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
cmp al, 0x5c
jne 0x404110
movzx eax, byte [ebp + 1]
add eax, 0xffffffde
cmp eax, 0x53
ja case.0x4040f7.35
lea edi, [ebp + 1]
jmp dword [eax*4 + 0x4426bc]
mov byte [esi], 0x22
jmp 0x40411c
cmp al, 0x20
jb case.0x4040f7.35
mov byte [esi], al
mov edi, ebp
inc esi
movzx eax, byte [edi + 1]
test al, al
mov ebp, dword [esp + 0xc]
je 0x404299
inc edi
mov ecx, edi
sub ecx, ebp
mov ebp, edi
cmp ecx, ebx
jb 0x4040e0
jmp 0x404299
mov byte [esi], 0xa
jmp 0x40411c
mov byte [esi], 0x2f
jmp 0x40411c
mov byte [esi], 8
jmp 0x40411c
lea ecx, [ebp + 2]
lea edx, [esp + 0x14]
call fcn.00404300
test eax, eax
jne 0x4042e2
mov ecx, dword [esp + 0x14]
cmp ecx, 0x7f
ja 0x40418e
mov byte [esi], cl
mov eax, 1
add edi, eax
add edi, 3
mov edx, dword [esp]
jmp 0x40411c
mov byte [esi], 0x5c
jmp 0x40411c
mov byte [esi], 0xd
jmp 0x40411c
mov byte [esi], 0xc
jmp 0x40411c
mov byte [esi], 9
jmp 0x40411c
cmp ecx, 0x7ff
mov edx, dword [esp]
ja 0x4041ae
mov eax, ecx
shr eax, 6
or al, 0xc0
mov byte [esi], al
and cl, 0x3f
or cl, 0x80
mov byte [esi + 1], cl
inc esi
jmp 0x4041de
lea eax, [ecx - 0xe000]
cmp eax, 0xfffff7ff
ja 0x4041ed
mov eax, ecx
shr eax, 0xc
and al, 0xf
or al, 0xe0
mov byte [esi], al
mov eax, ecx
shr eax, 6
and al, 0x3f
or al, 0x80
mov byte [esi + 1], al
and cl, 0x3f
or cl, 0x80
mov byte [esi + 2], cl
add esi, 2
mov eax, 1
add edi, eax
add edi, 3
jmp 0x40411c
cmp ecx, 0xdbff
ja 0x4042e2
cmp byte [ebp + 6], 0x5c
jne 0x4042e2
cmp byte [ebp + 7], 0x75
jne 0x4042e2
add ebp, 8
mov dword [esp + 4], ecx
mov ecx, ebp
lea edx, [esp + 0x10]
call fcn.00404300
mov ecx, dword [esp + 4]
test eax, eax
jne 0x4042e2
mov eax, dword [esp + 0x10]
cmp eax, 0xdc00
jb 0x4042e2
cmp eax, 0xdfff
ja 0x4042e2
shl ecx, 0xa
and ecx, 0xffc00
mov ebp, eax
mov edx, eax
and edx, 0x3ff
mov eax, ecx
add ecx, edx
add eax, edx
add eax, 0x10000
mov edx, eax
shr edx, 0x12
or dl, 0xf0
mov byte [esi], dl
shr eax, 0xc
and al, 0x3f
or al, 0x80
mov byte [esi + 1], al
shr ecx, 6
and cl, 0x3f
or cl, 0x80
mov byte [esi + 2], cl
mov eax, ebp
and al, 0x3f
or al, 0x80
mov byte [esi + 3], al
add esi, 3
mov eax, 7
jmp 0x404170
mov byte [esi], 0
mov eax, esi
xor eax, edx
mov ebx, edx
not ebx
and ebx, esi
add ebx, ebx
sub ebx, eax
lea esi, [ebx + 1]
push esi
mov edi, edx
call dword [0x4458a8]
mov edx, edi
add esp, 4
test eax, eax
je case.0x4040f7.35
push esi
push edx
push eax
mov edi, eax
mov esi, edx
call fcn.00409cf0
add esp, 0xc
mov eax, dword [esp + 8]
mov dword [eax], ebx
push esi
call dword [0x4458a4]
add esp, 4
mov eax, edi
jmp 0x4042f1
mov edx, dword [esp]
push edx
call dword [0x4458a4]
add esp, 4
xor eax, eax
add esp, 0x18
pop esi
pop edi
pop ebx
pop ebp
ret