Function at 0x4051c0
Capabilities:
Encode data using xor

Disassembly:
push esi
push edi
mov esi, eax
push ebp
push ebx
sub esp, 0x5c
fld xword [esp + 0x70]
fld st(0)
fstp xword [esp + 0x28]
fxam
wait
fnstsw ax
and ax, 0x4500
cmp ax, 0x100
je 0x4056e1
movzx edx, word [esp + 0x30]
test dx, dx
js 0x405620
fxam
wait
fnstsw ax
fstp st(0)
and ax, 0x4500
cmp ax, 0x500
je 0x4056f6
and dx, 0x7fff
mov word [esp + 8], dx
jne 0x4053a0
mov eax, dword [esp + 0x28]
mov edx, dword [esp + 0x2c]
mov edi, edx
mov dword [esp + 4], edx
or edx, eax
mov ebp, eax
mov dword [esp], eax
je 0x405643
test edi, edi
js 0x40573a
mov eax, 0xffffc001
shld edi, ebp, 1
mov edx, eax
add ebp, ebp
sub eax, 1
test edi, edi
jns 0x405241
mov ebx, dword [esi + 0xc]
mov word [esp + 8], dx
mov dword [esp], ebp
mov dword [esp + 4], edi
cmp ebx, 0xe
jbe 0x4053ca
mov eax, dword [esi + 4]
lea ebx, [esp + 0x3e]
mov dword [esp + 0xc], esi
mov ebp, dword [esp]
mov dword [esp + 0x10], ebx
mov esi, ebx
movzx ebx, word [esp + 8]
mov edi, eax
mov dword [esp + 0x14], eax
and eax, 0x20
and edi, 0x800
mov byte [esp + 0x1b], al
mov dword [esp + 0x1c], edi
mov edi, dword [esp + 4]
jmp 0x4052ef
mov eax, dword [esp + 0xc]
mov eax, dword [eax + 0xc]
test eax, eax
jle 0x4052b5
mov edx, dword [esp + 0xc]
sub eax, 1
mov dword [edx + 0xc], eax
shrd ebp, edi, 4
shr edi, 4
test ecx, ecx
mov dword [esp + 8], esi
je 0x405372
mov eax, dword [esp + 8]
cmp ecx, 9
lea esi, [eax + 1]
jle 0x405392
add ecx, 0x37
or cl, byte [esp + 0x1b]
mov eax, dword [esp + 8]
mov byte [eax], cl
mov edx, edi
or edx, ebp
je 0x405450
mov ecx, ebp
and ecx, 0xf
mov eax, ecx
mov dword [esp], ecx
cdq
mov eax, ecx
mov dword [esp + 4], edx
mov edx, dword [esp + 4]
xor eax, ebp
xor edx, edi
or edx, eax
jne 0x4052a0
cmp esi, dword [esp + 0x10]
ja 0x405330
mov eax, dword [esp + 0x1c]
test eax, eax
jne 0x405330
mov eax, dword [esp + 0xc]
mov dword [esp + 8], esi
mov eax, dword [eax + 0xc]
test eax, eax
jle 0x40533b
lea ebp, [ebp]
lea eax, [esi + 1]
mov byte [esi], 0x2e
mov dword [esp + 8], eax
mov esi, ebp
mov ebp, edi
xor esi, 1
or ebp, esi
je 0x405366
mov eax, dword [esp]
mov edx, dword [esp + 4]
lea ebp, [ebx - 1]
shrd eax, edx, 1
shr edx, 1
mov ebx, ebp
mov edi, eax
mov esi, edx
lea ebp, [ebx - 1]
xor edi, 1
or esi, edi
jne 0x405350
xor ebp, ebp
xor edi, edi
test ecx, ecx
jne 0x4052c8
mov edx, dword [esp + 0x10]
cmp dword [esp + 8], edx
ja 0x40538b
mov eax, dword [esp + 0xc]
mov esi, dword [eax + 0xc]
test esi, esi
js 0x4056c0
mov eax, dword [esp + 8]
lea esi, [eax + 1]
add ecx, 0x30
jmp 0x4052df
mov eax, dword [esp + 0x28]
mov edx, dword [esp + 0x2c]
sub word [esp + 8], 0x3fff
mov dword [esp + 4], edx
or edx, eax
mov dword [esp], eax
je 0x405643
mov ebx, dword [esi + 0xc]
cmp ebx, 0xe
ja 0x405268
mov edi, dword [esp + 4]
mov ebp, dword [esp]
test edi, edi
js 0x4053e6
shld edi, ebp, 1
add ebp, ebp
test edi, edi
jns 0x4053d5
mov dword [esp], ebp
mov dword [esp + 4], edi
mov ecx, 0xe
mov eax, 4
xor edx, edx
sub ecx, ebx
shl ecx, 2
shld edx, eax, cl
shl eax, cl
test cl, 0x20
je 0x405405
mov edx, eax
xor eax, eax
mov edi, dword [esp + 4]
mov ebp, dword [esp]
shrd ebp, edi, 1
shr edi, 1
add eax, ebp
adc edx, edi
test edx, edx
js 0x40570e
shld edx, eax, 1
add eax, eax
mov ecx, 0xf
sub ecx, ebx
shl ecx, 2
shrd eax, edx, cl
shr edx, cl
test cl, 0x20
je 0x40543c
mov eax, edx
xor edx, edx
mov dword [esp], eax
mov dword [esp + 4], edx
jmp 0x405268
mov word [esp + 8], bx
mov ebx, esi
cmp ebx, dword [esp + 0x10]
mov esi, dword [esp + 0xc]
je 0x405652
mov eax, dword [esi + 8]
test eax, eax
mov dword [esp], eax
jle 0x405630
movsx edi, word [esp + 8]
mov edx, dword [esi + 0xc]
mov eax, ebx
sub eax, dword [esp + 0x10]
test edx, edx
mov dword [esp + 8], edi
jle 0x40548b
add eax, edx
xor edx, edx
test dword [esp + 0x14], 0x1c0
mov ecx, 0x66666667
setne dl
lea edi, [eax + edx + 5]
mov eax, dword [esp + 8]
imul ecx
mov eax, dword [esp + 8]
mov ecx, edx
sar eax, 0x1f
sar ecx, 2
sub ecx, eax
je 0x405719
mov ebp, 2
mov eax, 0x66666667
add edi, 1
add ebp, 1
imul ecx
sar ecx, 0x1f
sar edx, 2
sub edx, ecx
mov ecx, edx
jne 0x4054c0
movsx ebp, bp
mov eax, dword [esp]
cmp eax, edi
jle 0x405540
sub eax, edi
test dword [esp + 0x14], 0x600
jne 0x405671
sub eax, 1
mov dword [esi + 8], eax
lea ebp, [ebp]
mov edx, esi
mov eax, 0x20
call fcn.004041e0
mov eax, dword [esi + 8]
lea edx, [eax - 1]
test eax, eax
mov dword [esi + 8], edx
jg 0x405500
mov eax, dword [esi + 4]
mov dword [esp + 0x14], eax
test byte [esp + 0x14], 0x80
je 0x40554e
mov ebp, ebp
lea edi, [edi]
mov edx, esi
mov eax, 0x2d
call fcn.004041e0
jmp 0x405567
mov dword [esi + 8], 0xffffffff
test byte [esp + 0x14], 0x80
jne 0x405530
test dword [esp + 0x14], 0x100
jne 0x405680
test byte [esp + 0x14], 0x40
jne 0x4056d0
mov edx, esi
mov eax, 0x30
call fcn.004041e0
mov eax, dword [esi + 4]
mov edx, esi
and eax, 0x20
or eax, 0x58
call fcn.004041e0
mov edx, dword [esi + 8]
test edx, edx
jle 0x40559d
mov eax, dword [esi + 4]
and eax, 0x600
cmp eax, 0x200
je 0x405691
cmp ebx, dword [esp + 0x10]
mov edi, dword [esp + 0x10]
jbe 0x4055dc
mov ebp, ebp
lea edi, [edi]
sub ebx, 1
movsx eax, byte [ebx]
mov edx, esi
call fcn.00404730
cmp ebx, edi
jne 0x4055b0
mov eax, dword [esi + 0xc]
lea edx, [eax - 1]
test eax, eax
mov dword [esi + 0xc], edx
jle 0x4055e9
nop
mov edx, esi
mov eax, 0x30
call fcn.004041e0
mov eax, dword [esi + 0xc]
lea edx, [eax - 1]
test eax, eax
mov dword [esi + 0xc], edx
jg 0x4055d0
mov eax, dword [esi + 4]
mov edx, esi
and eax, 0x20
or eax, 0x50
call fcn.004041e0
mov eax, dword [esp + 8]
add dword [esi + 8], ebp
mov ecx, esi
or dword [esi + 4], 0x1c0
cdq
call fcn.00404770
add esp, 0x5c
pop ebx
pop ebp
pop edi
pop esi
ret
or dword [esi + 4], 0x80
jmp 0x4051f4
movsx eax, word [esp + 8]
mov ebp, 2
mov dword [esp + 8], eax
jmp 0x405547
mov eax, dword [esi + 4]
mov dword [esp + 0x14], eax
lea eax, [esp + 0x3e]
mov dword [esp + 0x10], eax
mov edx, dword [esi + 0xc]
test edx, edx
jle 0x405723
lea eax, [esp + 0x3f]
mov byte [esp + 0x3e], 0x2e
lea ebx, [eax + 1]
mov byte [eax], 0x30
jmp 0x405465
mov dword [esi + 8], eax
jmp 0x405547
mov edx, esi
mov eax, 0x2b
call fcn.004041e0
jmp 0x405567
sub edx, 1
mov dword [esi + 8], edx
mov ebp, ebp
lea edi, [edi]
mov edx, esi
mov eax, 0x30
call fcn.004041e0
mov eax, dword [esi + 8]
lea edx, [eax - 1]
test eax, eax
mov dword [esi + 8], edx
jg 0x4056a0
jmp 0x40559d
mov esi, dword [esp + 8]
jmp 0x4052e5
mov edx, esi
mov eax, 0x20
call fcn.004041e0
jmp 0x405567
fstp st(0)
mov ecx, esi
mov edx, 0x40b331
xor eax, eax
call fcn.00404440
jmp 0x40560f
mov eax, edx
mov ecx, esi
mov edx, 0x40b335
and eax, 0x8000
call fcn.00404440
jmp 0x40560f
add word [esp + 8], 1
jmp 0x405424
mov ebp, 2
jmp 0x4054dc
test dword [esp + 0x14], 0x800
mov eax, dword [esp + 0x10]
je 0x405666
jmp 0x40565d
mov ebx, dword [esi + 0xc]
mov eax, 0xffffc002
mov word [esp + 8], ax
cmp ebx, 0xe
jbe 0x4053e6
jmp 0x405268