Function at 0x420870
Capabilities:
Encrypt data using rc4 prga

Disassembly:
push ebp
mov ebp, esp
sub esp, 8
push ebx
push esi
push edi
mov edi, dword [ebp + 8]
mov esi, dword [edi + 0x2c]
mov edx, dword [edi + 0x74]
mov eax, dword [edi + 0x2c]
mov ebx, dword [edi + 0x3c]
add eax, 0xfffffefa
sub ebx, dword [edi + 0x6c]
add eax, esi
sub ebx, edx
cmp dword [edi + 0x6c], eax
jb 0x420918
mov ecx, dword [edi + 0x38]
push esi
lea eax, [ecx + esi]
push eax
push ecx
call fcn.0043da70
mov eax, dword [edi + 0x4c]
add esp, 0xc
sub dword [edi + 0x70], esi
sub dword [edi + 0x6c], esi
sub dword [edi + 0x5c], esi
mov dword [ebp - 4], eax
mov eax, dword [edi + 0x44]
mov edi, dword [ebp - 4]
lea edx, [eax + edi*2]
movzx ecx, word [edx - 2]
lea edx, [edx - 2]
mov eax, ecx
mov dword [ebp - 4], 0
sub eax, esi
cmp ecx, esi
movzx eax, ax
cmovb eax, dword [ebp - 4]
mov word [edx], ax
sub edi, 1
jne 0x4208c2
mov edi, dword [ebp + 8]
mov eax, dword [edi + 0x40]
mov edi, esi
lea edx, [eax + esi*2]
movzx ecx, word [edx - 2]
lea edx, [edx - 2]
mov eax, ecx
mov dword [ebp - 4], 0
sub eax, esi
cmp ecx, esi
movzx eax, ax
cmovb eax, dword [ebp - 4]
mov word [edx], ax
sub edi, 1
jne 0x4208f0
mov edi, dword [ebp + 8]
add ebx, esi
mov ecx, dword [edi]
mov dword [ebp - 4], ecx
mov eax, dword [ecx + 4]
test eax, eax
je 0x420a49
mov ecx, dword [edi + 0x6c]
mov edx, dword [edi + 0x74]
add ecx, edx
add ecx, dword [edi + 0x38]
cmp eax, ebx
mov dword [ebp - 8], ecx
mov ecx, dword [ebp - 4]
cmovbe ebx, eax
test ebx, ebx
jne 0x420946
xor ebx, ebx
jmp 0x420995
sub eax, ebx
mov dword [ecx + 4], eax
mov eax, dword [ecx + 0x1c]
mov eax, dword [eax + 0x18]
cmp eax, 1
jne 0x420963
push ebx
push dword [ecx]
push dword [ecx + 0x30]
call fcn.00412ec0
jmp 0x420973
cmp eax, 2
jne 0x42097c
push ebx
push dword [ecx]
push dword [ecx + 0x30]
call fcn.00416b90
mov ecx, dword [ebp - 4]
add esp, 0xc
mov dword [ecx + 0x30], eax
push ebx
push dword [ecx]
push dword [ebp - 8]
call fcn.0043da70
mov eax, dword [ebp - 4]
add esp, 0xc
add dword [eax], ebx
add dword [eax + 8], ebx
mov edx, dword [edi + 0x74]
add edx, ebx
mov dword [ebp - 8], edx
mov dword [edi + 0x74], edx
cmp edx, 3
jb 0x4209c2
mov eax, dword [edi + 0x38]
add eax, dword [edi + 0x6c]
mov ecx, dword [edi + 0x58]
movzx edx, byte [eax]
mov dword [edi + 0x48], edx
movzx eax, byte [eax + 1]
shl edx, cl
xor edx, eax
and edx, dword [edi + 0x54]
mov dword [edi + 0x48], edx
mov edx, dword [ebp - 8]
cmp edx, 0x106
jae 0x4209d6
mov eax, dword [edi]
cmp dword [eax + 4], 0
jne 0x420882
mov ecx, dword [edi + 0x16c0]
mov esi, dword [edi + 0x3c]
cmp ecx, esi
jae 0x420a49
mov ebx, dword [edi + 0x6c]
add ebx, edx
cmp ecx, ebx
jae 0x420a19
mov eax, 0x102
sub esi, ebx
cmp esi, eax
cmova esi, eax
mov eax, dword [edi + 0x38]
push esi
add eax, ebx
push 0
push eax
call fcn.0043d910
add esp, 0xc
lea eax, [esi + ebx]
mov dword [edi + 0x16c0], eax
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
lea eax, [ebx + 0x102]
cmp ecx, eax
jae 0x420a49
sub ebx, ecx
sub esi, ecx
lea eax, [ebx + 0x102]
cmp eax, esi
cmovbe esi, eax
mov eax, dword [edi + 0x38]
push esi
add eax, ecx
push 0
push eax
call fcn.0043d910
add esp, 0xc
add dword [edi + 0x16c0], esi
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret