Function at 0x1289e90
Capabilities:
Encode data using xor

Disassembly:
push ebp
push ebx
push edi
push esi
sub esp, 0x298
mov ebx, dword [0x129eef4]
mov ebp, dword [0x129eef0]
mov eax, ebp
or eax, ebx
jne 0x1289f5e
mov dword [esp + 0x50], 0x8f3a893a
mov dword [esp + 0x54], 0x833e8d28
mov dword [esp + 0x58], 0x8774813c
mov dword [esp + 0x5c], 0x9b268520
mov dword [esp + 0x60], 0x9f9e9924
mov word [esp + 0x64], 0
mov dword [esp + 0x158], 0
mov eax, dword [esp + 0x158]
cmp eax, 0x15
ja 0x1289f3a
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
mov eax, dword [esp + 0x158]
movzx eax, byte [esp + eax + 0x50]
push dword [esp + 0x158]
push eax
call fcn.0128a9a0
add esp, 8
mov ecx, dword [esp + 0x158]
mov byte [esp + ecx + 0x50], al
inc dword [esp + 0x158]
mov eax, dword [esp + 0x158]
cmp eax, 0x16
jb 0x1289f00
lea eax, [esp + 0x50]
push eax
call fcn.01289af0
add esp, 4
mov ebp, eax
mov dword [0x129eef4], edx
mov dword [0x129eef0], eax
or eax, edx
je 0x128a04b
mov ebx, edx
lea eax, [esp + 0x258]
push 0x40
push eax
push ebx
push ebp
call fcn.01289860
add esp, 0x10
test eax, eax
js 0x128a04b
mov eax, dword [esp + 0x294]
mov ecx, eax
sar ecx, 0x1f
add eax, ebp
adc ecx, ebx
lea edx, [esp + 0x50]
push 0x108
push edx
push ecx
push eax
call fcn.01289860
add esp, 0x10
xor edi, edi
test eax, eax
js 0x128a04d
cmp dword [esp + 0xdc], 0
je 0x128a04d
mov eax, dword [esp + 0xd8]
mov esi, 0
test eax, eax
je 0x128a04f
mov edx, ebp
and edx, eax
mov ecx, edx
shr ecx, 0x1f
add edx, edx
xor eax, ebp
add eax, edx
adc ecx, ebx
lea edx, [esp + 0x28]
push 0x28
push edx
push ecx
push eax
call fcn.01289860
add esp, 0x10
test eax, eax
js 0x128a04b
mov ecx, dword [esp + 0x3c]
lea esi, [ecx*4]
mov eax, 0xffffffff
cmp ecx, 0x40000000
jae 0x128a00a
mov eax, esi
push eax
call fcn.0124d720
add esp, 4
mov edi, dword [esp + 0x44]
mov edx, ebp
and edx, edi
mov ecx, edx
shr ecx, 0x1f
add edx, edx
xor edi, ebp
add edi, edx
adc ecx, ebx
push esi
mov dword [esp + 0x10], eax
push eax
push ecx
push edi
call fcn.01289860
add esp, 0x10
test eax, eax
js 0x128a05e
mov eax, dword [esp + 0x3c]
test eax, eax
jns 0x128a067
mov eax, 0xffffffff
jmp 0x128a069
xor edi, edi
xor esi, esi
mov eax, edi
mov edx, esi
add esp, 0x298
pop esi
pop edi
pop ebx
pop ebp
ret
xor edi, edi
xor esi, esi
jmp 0x128a287
add eax, eax
push eax
call fcn.0124d720
add esp, 4
mov esi, dword [esp + 0x40]
add esi, esi
mov ecx, dword [esp + 0x4c]
add ecx, ebp
mov edx, ebx
adc edx, 0
push esi
mov dword [esp + 0xc], eax
push eax
push edx
push ecx
call fcn.01289860
add esp, 0x10
test eax, eax
js 0x128a277
mov esi, dword [esp + 0x40]
mov eax, 0xffffffff
cmp esi, 0x40000000
jae 0x128a0b3
lea eax, [esi*4]
push eax
call fcn.0124d720
add esp, 4
mov edi, eax
mov eax, esi
and eax, 0xfffffffb
mov ecx, esi
and ecx, 4
or esi, 4
imul esi, ecx
xor ecx, 4
imul ecx, eax
add esi, ecx
mov eax, dword [esp + 0x48]
add eax, ebp
mov ecx, ebx
adc ecx, 0
push esi
push edi
push ecx
push eax
call fcn.01289860
add esp, 0x10
test eax, eax
mov dword [esp + 4], edi
js 0x128a265
mov esi, dword [esp + 0x3c]
mov eax, dword [esp + 0x40]
cmp esi, eax
jb 0x128a107
mov esi, eax
test esi, esi
je 0x128a265
xor eax, eax
mov dword [esp + 0x24], ebx
mov dword [esp + 0x20], ebp
mov dword [esp + 0x1c], esi
jmp 0x128a14a
mov esi, 0xb14a5e2
cmp esi, dword [esp + 0x2ac]
mov ebx, dword [esp + 0x24]
mov ebp, dword [esp + 0x20]
mov esi, dword [esp + 0x1c]
je 0x128a298
mov eax, dword [esp + 0x10]
inc eax
cmp eax, esi
je 0x128a265
mov dword [esp + 0x10], eax
mov eax, dword [edi + eax*4]
add eax, ebp
mov ecx, ebx
adc ecx, 0
push 0x100
lea edx, [esp + 0x15c]
push edx
push ecx
push eax
call fcn.01289860
add esp, 0x10
cmp eax, 0xbfffffff
ja 0x128a13d
mov ebx, 0xffffffff
xor eax, eax
nop
nop
nop
mov ebp, eax
cmp byte [esp + ebx + 0x159], 0
lea ebx, [ebx + 1]
lea eax, [eax + 1]
jne 0x128a180
mov dword [esp + 0x14], 0x2e2a2cb1
mov dword [esp + 0x18], 0
mov dword [esp], 0
mov eax, dword [esp]
cmp eax, 7
ja 0x128a1e6
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
mov eax, dword [esp]
movzx eax, byte [esp + eax + 0x14]
push dword [esp]
push eax
call fcn.0128aa10
add esp, 8
mov ecx, dword [esp]
mov byte [esp + ecx + 0x14], al
inc dword [esp]
mov eax, dword [esp]
cmp eax, 8
jb 0x128a1c0
test ebx, ebx
je 0x128a11f
mov eax, dword [esp + 0x14]
mov edx, 0xb14a5e2
lea ecx, [esp + 0x158]
cmp ebx, 4
jb 0x128a23f
mov esi, ebp
and esi, 0xfffffffc
nop
nop
nop
nop
nop
nop
nop
nop
movsx edi, byte [ecx]
xor edi, edx
imul edi, eax
movsx edx, byte [ecx + 1]
xor edx, edi
imul edx, eax
movsx edi, byte [ecx + 2]
xor edi, edx
imul edi, eax
movsx edx, byte [ecx + 3]
add ecx, 4
xor edx, edi
imul edx, eax
add esi, 0xfffffffc
jne 0x128a210
mov edi, dword [esp + 4]
mov esi, edx
test bl, 3
je 0x128a124
and ebp, 3
xor ebx, ebx
nop
movsx esi, byte [ecx + ebx]
xor esi, edx
imul esi, eax
inc ebx
mov edx, esi
cmp ebp, ebx
jne 0x128a250
jmp 0x128a124
xor edi, edi
xor esi, esi
push dword [esp + 4]
call fcn.0124d730
add esp, 4
jmp 0x128a27b
xor edi, edi
xor esi, esi
push dword [esp + 8]
call fcn.0124d730
add esp, 4
push dword [esp + 0xc]
call fcn.0124d730
add esp, 4
jmp 0x128a04f
mov eax, dword [esp + 8]
mov ecx, dword [esp + 0x10]
movzx eax, word [eax + ecx*2]
mov ecx, dword [esp + 0xc]
add ebp, dword [ecx + eax*4]
adc ebx, 0
mov edi, ebp
mov esi, ebx
jmp 0x128a269