Function at 0x6407f8
Capabilities:
Encrypt data using rc4 prga

Disassembly:
push ebp
mov ebp, esp
add esp, 0xffffffd8
push ebx
push esi
push edi
mov ebx, ecx
mov dword [ebp - 0x24], edx
mov dword [ebp - 4], eax
mov esi, dword [ebp + 8]
lea edi, [ebp - 4]
mov eax, dword [edi]
mov eax, dword [eax + 0x2c]
mov dword [ebp - 0xc], eax
mov eax, dword [edi]
mov eax, dword [eax + 0x24]
shl eax, 5
mov edx, dword [ebp - 0xc]
movzx edx, byte [edx + 2]
xor eax, edx
and eax, 0x3fff
mov edx, dword [edi]
mov dword [edx + 0x24], eax
mov edx, dword [edi]
mov edx, dword [edx + 0x20]
mov eax, dword [edx + eax*4]
mov dword [ebp - 8], eax
mov eax, dword [edi]
mov eax, dword [eax + 0x24]
mov edx, dword [edi]
mov edx, dword [edx + 0x20]
mov ecx, dword [ebp - 0xc]
mov dword [edx + eax*4], ecx
mov eax, dword [edi]
mov eax, dword [eax + 0x6c]
and eax, dword [ebp - 0xc]
mov edx, dword [edi]
mov edx, dword [edx + 0x1c]
mov ecx, dword [ebp - 8]
mov dword [edx + eax*4], ecx
mov eax, dword [edi]
mov eax, dword [eax + 0x30]
sub eax, dword [ebp - 0xc]
mov dword [ebp - 0x1c], eax
mov eax, dword [edi]
mov eax, dword [eax + 0x34]
cmp eax, dword [ebp - 0x1c]
jge 0x640878
mov dword [ebp - 0x1c], eax
mov eax, dword [ebp - 0x24]
cmp eax, dword [ebp - 0x1c]
jle 0x640886
mov eax, dword [ebp - 0x1c]
mov dword [ebp - 0x24], eax
mov eax, dword [esi]
test eax, eax
jne 0x640895
mov dword [ebp - 0x14], 2
jmp 0x6408b1
cmp eax, dword [ebp - 0x1c]
jle 0x6408ae
xor eax, eax
xor edx, edx
mov dword [ebx], edx
mov edx, dword [ebp - 0xc]
movzx edx, byte [edx]
mov byte [ebx + 8], dl
jmp 0x6409e4
mov dword [ebp - 0x14], eax
mov eax, dword [ebp - 0xc]
movzx eax, word [eax]
mov word [ebp - 0xe], ax
mov eax, dword [ebp - 0x14]
dec eax
add eax, dword [ebp - 0xc]
movzx eax, word [eax]
mov word [ebp - 0x16], ax
mov eax, dword [ebp - 0x14]
cmp eax, dword [ebp - 0x24]
jl 0x6408e5
mov eax, dword [edi]
mov eax, dword [eax + 0x18]
test eax, eax
jns 0x6408dd
add eax, 3
sar eax, 2
mov dword [ebp - 0x28], eax
jmp 0x6408ed
mov eax, dword [edi]
mov eax, dword [eax + 0x18]
mov dword [ebp - 0x28], eax
xor eax, eax
mov dword [ebp - 0x20], eax
push ebx
push esi
push edi
mov ebx, dword [ebp - 4]
mov edi, dword [ebp - 8]
mov esi, dword [ebp - 0xc]
or edi, edi
je 0x6409ad
cmp edi, dword [ebx + 0x4c]
jb 0x6409ad
cmp edi, dword [ebp - 0xc]
jae 0x6409ad
mov ax, word [edi]
cmp word [ebp - 0xe], ax
jne 0x640991
mov edx, edi
add edi, dword [ebp - 0x14]
dec edi
mov ax, word [edi]
cmp word [ebp - 0x16], ax
mov edi, edx
jne 0x640991
push edi
push esi
mov eax, dword [ebp - 0x1c]
add edi, 2
sub eax, 2
add esi, 2
mov ecx, eax
cmp ecx, 4
jb 0x64095a
mov edx, dword [esi]
cmp edx, dword [edi]
jne 0x64095a
add esi, 4
add edi, 4
sub ecx, 4
jne 0x640942
jmp 0x640969
or ecx, ecx
jb 0x640969
mov dl, byte [esi]
cmp dl, byte [edi]
jne 0x640969
inc esi
inc edi
dec ecx
jne 0x64095a
sub eax, ecx
add eax, 2
pop esi
pop edi
cmp eax, dword [ebp - 0x14]
jbe 0x640991
mov dword [ebp - 0x14], eax
mov eax, esi
sub eax, edi
mov dword [ebp - 0x20], eax
cmp eax, dword [ebp - 0x24]
jae 0x6409ad
mov eax, esi
add eax, dword [ebp - 0x14]
dec eax
mov ax, word [eax]
mov word [ebp - 0x16], ax
mov eax, dword [ebp - 0x28]
dec eax
je 0x6409ad
mov dword [ebp - 0x28], eax
mov edx, dword [ebx + 0x1c]
mov eax, dword [ebx + 0x6c]
and edi, eax
shl edi, 2
mov edi, dword [edi + edx]
jmp 0x6408fe
pop edi
pop esi
pop ebx
cmp dword [ebp - 0x14], 3
jl 0x6409bd
mov eax, dword [esi]
cmp eax, dword [ebp - 0x14]
jl 0x6409ce
xor eax, eax
xor edx, edx
mov dword [ebx], edx
mov edx, dword [ebp - 0xc]
movzx edx, byte [edx]
mov byte [ebx + 8], dl
jmp 0x6409e4
mov al, 1
mov edx, dword [ebp - 0x14]
mov dword [ebx], edx
mov edx, dword [ebp - 0x20]
mov dword [ebx + 4], edx
mov edx, dword [ebp - 0xc]
movzx edx, byte [edx]
mov byte [ebx + 8], dl
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret 4