Function at 0x421660
Capabilities:
Encode data using xor

Disassembly:
push ebp
push edi
push esi
push ebx
mov ebx, eax
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 0x421b64
movzx edi, word [esp + 0x30]
mov esi, edi
and esi, 0x8000
jne 0x4217d0
fxam
wait
fnstsw ax
fstp st(0)
and ax, 0x4500
cmp ax, 0x500
je 0x421b79
and di, 0x7fff
mov ecx, edi
je 0x4217e0
mov ebp, dword [ebx + 0xc]
lea eax, [ecx - 0x3fff]
mov esi, dword [esp + 0x28]
mov edi, dword [esp + 0x2c]
mov word [esp + 0x16], ax
cmp ebp, 0xe
jbe 0x421931
mov eax, edi
or eax, esi
je 0x421afb
mov eax, dword [ebx + 4]
lea ecx, [esp + 0x38]
movzx edx, word [esp + 0x16]
mov dword [esp + 8], ebx
mov ebp, ecx
mov dword [esp + 0xc], ecx
mov ecx, eax
mov dword [esp + 0x18], eax
and eax, 0x20
and ecx, 0x800
mov byte [esp + 0x10], al
mov dword [esp + 0x1c], ecx
mov ecx, ebp
jmp 0x421757
mov ebx, dword [esp + 8]
mov ebx, dword [ebx + 0xc]
test ebx, ebx
jle 0x42172a
mov ebp, dword [esp + 8]
sub ebx, 1
mov dword [ebp + 0xc], ebx
shrd esi, edi, 4
shr edi, 4
test eax, eax
mov ebp, ecx
je 0x4217af
cmp eax, 9
lea ecx, [ebp + 1]
jle 0x4217c7
add eax, 0x37
or al, byte [esp + 0x10]
mov byte [ebp], al
mov eax, edi
or eax, esi
je 0x421830
mov eax, esi
and eax, 0xf
cmp eax, esi
jne 0x421715
cmp ecx, dword [esp + 0xc]
ja 0x421780
mov ebp, dword [esp + 0x1c]
test ebp, ebp
jne 0x421780
mov ebx, dword [esp + 8]
mov ebp, ecx
mov ebx, dword [ebx + 0xc]
test ebx, ebx
jle 0x421786
nop
lea esi, [esi]
lea ebp, [ecx + 1]
mov byte [ecx], 0x2e
cmp edi, 0
ja 0x421790
cmp esi, 1
jbe 0x4217a7
lea ecx, [edx - 1]
shrd esi, edi, 1
shr edi, 1
mov edx, ecx
mov ebx, esi
lea ecx, [edx - 1]
xor ebx, 1
or ebx, edi
jne 0x421793
xor esi, esi
xor edi, edi
test eax, eax
jne 0x421737
cmp ebp, dword [esp + 0xc]
ja 0x4217c4
mov ecx, dword [esp + 8]
mov ecx, dword [ecx + 0xc]
test ecx, ecx
js 0x4219b0
lea ecx, [ebp + 1]
add eax, 0x30
jmp 0x42174a
or dword [ebx + 4], 0x80
jmp 0x421699
mov edx, dword [esp + 0x2c]
mov eax, dword [esp + 0x28]
mov edi, edx
or edi, eax
je 0x421aec
test edx, edx
js 0x421b9e
mov ecx, 0xffffc001
nop
shld edx, eax, 1
mov edi, ecx
add eax, eax
sub ecx, 1
test edx, edx
jns 0x421800
mov word [esp + 0x16], di
mov esi, eax
mov edi, edx
mov ebp, dword [ebx + 0xc]
cmp ebp, 0xe
jbe 0x42194f
jmp 0x4216e4
cmp ecx, dword [esp + 0xc]
mov word [esp + 0x16], dx
mov ebp, ecx
mov ebx, dword [esp + 8]
je 0x421b96
mov eax, dword [ebx + 8]
test eax, eax
mov dword [esp + 8], eax
jle 0x421ad9
mov eax, ebp
sub eax, dword [esp + 0xc]
mov edx, dword [ebx + 0xc]
movsx edi, word [esp + 0x16]
test edx, edx
lea ecx, [eax + edx]
mov edx, dword [esp + 0x18]
mov dword [esp + 0x10], edi
cmovg eax, ecx
mov ecx, 0x66666667
and edx, 0x1c0
cmp edx, 1
sbb edx, edx
lea esi, [eax + edx + 6]
mov eax, edi
imul ecx
mov eax, edi
sar eax, 0x1f
mov ecx, edx
sar ecx, 2
sub ecx, eax
je 0x421b8c
mov edi, 2
mov eax, 0x66666667
add esi, 1
add edi, 1
imul ecx
sar ecx, 0x1f
sar edx, 2
sub edx, ecx
mov ecx, edx
jne 0x4218a1
movsx edi, di
cmp dword [esp + 8], esi
jle 0x4219c0
mov eax, dword [esp + 8]
sub eax, esi
test dword [esp + 0x18], 0x600
jne 0x421b26
lea edx, [eax - 1]
test eax, eax
mov dword [ebx + 8], edx
jle 0x4219c7
lea esi, [esi]
mov edx, ebx
mov eax, 0x20
call fcn.00420410
mov eax, dword [ebx + 8]
lea edx, [eax - 1]
test eax, eax
mov dword [ebx + 8], edx
jg 0x4218f0
mov eax, dword [ebx + 4]
mov dword [esp + 0x18], eax
test byte [esp + 0x18], 0x80
je 0x4219d2
nop
lea esi, [esi]
mov edx, ebx
mov eax, 0x2d
call fcn.00420410
jmp 0x4219eb
test edi, edi
js 0x42194f
mov ecx, eax
mov esi, esi
lea edi, [edi]
shld edi, esi, 1
add esi, esi
test edi, edi
jns 0x421940
mov word [esp + 0x16], cx
mov ecx, 0xe
mov eax, 4
xor edx, edx
sub ecx, ebp
shl ecx, 2
shrd esi, edi, 1
shld edx, eax, cl
shr edi, 1
shl eax, cl
test cl, 0x20
je 0x421974
mov edx, eax
xor eax, eax
add eax, esi
adc edx, edi
test edx, edx
js 0x421b59
shld edx, eax, 1
add eax, eax
mov ecx, 0xf
xor esi, esi
sub ecx, ebp
shl ecx, 2
shrd eax, edx, cl
shr edx, cl
test cl, 0x20
cmovne eax, edx
cmovne edx, esi
mov edi, edx
mov esi, eax
jmp 0x4216e4
mov ecx, ebp
jmp 0x42174d
mov dword [ebx + 8], 0xffffffff
test byte [esp + 0x18], 0x80
jne 0x421920
test dword [esp + 0x18], 0x100
jne 0x421b37
test byte [esp + 0x18], 0x40
jne 0x421b48
mov edx, ebx
mov eax, 0x30
call fcn.00420410
mov eax, dword [ebx + 4]
mov edx, ebx
and eax, 0x20
or eax, 0x58
call fcn.00420410
mov eax, dword [ebx + 8]
test eax, eax
jle 0x421a39
test byte [ebx + 5], 2
je 0x421a39
sub eax, 1
mov dword [ebx + 8], eax
lea esi, [esi]
mov edx, ebx
mov eax, 0x30
call fcn.00420410
mov eax, dword [ebx + 8]
lea edx, [eax - 1]
test eax, eax
mov dword [ebx + 8], edx
jg 0x421a20
cmp ebp, dword [esp + 0xc]
mov esi, dword [esp + 0xc]
ja 0x421a67
jmp 0x421a8d
movzx eax, word [ebx + 0x1c]
test ax, ax
mov word [esp + 0x26], ax
je 0x421a63
lea eax, [esp + 0x26]
mov ecx, ebx
mov edx, 1
call fcn.00420470
cmp ebp, esi
je 0x421a8d
sub ebp, 1
movsx eax, byte [ebp]
cmp eax, 0x2e
je 0x421ad0
cmp eax, 0x2c
je 0x421a45
mov edx, ebx
call fcn.00420410
jmp 0x421a63
mov edx, ebx
mov eax, 0x30
call fcn.00420410
mov eax, dword [ebx + 0xc]
lea edx, [eax - 1]
test eax, eax
mov dword [ebx + 0xc], edx
jg 0x421a81
mov eax, dword [ebx + 4]
mov edx, ebx
and eax, 0x20
or eax, 0x50
call fcn.00420410
mov eax, dword [esp + 0x10]
add dword [ebx + 8], edi
mov ecx, ebx
or dword [ebx + 4], 0x1c0
cdq
call fcn.00420c40
add esp, 0x5c
pop ebx
pop esi
pop edi
pop ebp
ret
mov eax, ebx
call fcn.00420730
jmp 0x421a63
movsx eax, word [esp + 0x16]
mov edi, 2
mov dword [esp + 0x10], eax
jmp 0x4219c7
mov ebp, dword [ebx + 0xc]
cmp ebp, 0xe
jbe 0x421b2e
xor edx, edx
mov word [esp + 0x16], dx
mov eax, dword [ebx + 4]
mov dword [esp + 0x18], eax
lea eax, [esp + 0x38]
mov dword [esp + 0xc], eax
test ebp, ebp
jle 0x421bb1
lea eax, [esp + 0x39]
mov byte [esp + 0x38], 0x2e
lea ebp, [eax + 1]
mov byte [eax], 0x30
jmp 0x421845
mov dword [ebx + 8], eax
jmp 0x4219c7
xor esi, esi
xor edi, edi
jmp 0x421940
mov edx, ebx
mov eax, 0x2b
call fcn.00420410
jmp 0x4219eb
mov edx, ebx
mov eax, 0x20
call fcn.00420410
jmp 0x4219eb
add word [esp + 0x16], 1
jmp 0x421986
fstp st(0)
mov ecx, ebx
mov edx, 0x42a62f
xor eax, eax
call fcn.00420690
jmp 0x421ac0
mov ecx, ebx
mov edx, 0x42a633
mov eax, esi
call fcn.00420690
jmp 0x421ac0
mov edi, 2
jmp 0x4218bd
mov ebp, dword [ebx + 0xc]
jmp 0x421b0a
mov esi, eax
mov eax, 0xffffc002
mov edi, edx
mov word [esp + 0x16], ax
jmp 0x421818
test dword [esp + 0x18], 0x800
mov eax, dword [esp + 0xc]
je 0x421b1b
jmp 0x421b12