Function at 0x1001bf20
Capabilities:
Encode data using xor
Generate random numbers using the delphi lcg

Disassembly:
sub esp, 0x10
push ebp
mov ebp, dword [esp + 0x18]
mov dword [esp + 4], 0
push esi
test ebp, ebp
je 0x1001c273
mov esi, dword [ebp + 0xe0]
test esi, esi
je 0x1001c273
cmp dword [esi], 0
jne 0x1001bf57
pop esi
mov eax, 0xffffff9c
pop ebp
add esp, 0x10
ret
mov edx, dword [esp + 0x24]
push ebx
push edi
test edx, edx
je 0x1001c269
mov eax, dword [esp + 0x28]
xor ebx, ebx
mov ecx, edx
mov dword [esi + 0x10], eax
mov eax, dword [esi + 0x80]
mov dword [esi + 0x14], edx
mov dword [esp + 0x14], ebx
cmp ebx, dword [esi + 0x84]
jb 0x1001bf98
ja 0x1001bf8b
cmp edx, eax
jbe 0x1001bf98
cmp dword [esi + 0xc8], ebx
jne 0x1001bf98
mov dword [esi + 0x14], eax
mov ecx, eax
mov ebx, dword [esi + 8]
xor eax, eax
mov edi, ebx
add edi, dword [esi + 0x78]
adc eax, dword [esi + 0x7c]
cmp dword [esp + 0x14], eax
jb 0x1001bfc2
ja 0x1001bfb1
cmp edx, edi
jbe 0x1001bfc2
cmp dword [esi + 0xc8], 0
je 0x1001bfc2
mov ecx, dword [esi + 0x78]
add ecx, ebx
mov dword [esi + 0x14], ecx
test ecx, ecx
je 0x1001c248
nop word [eax + eax]
mov edi, dword [esi + 8]
test edi, edi
jne 0x1001c11e
mov ecx, dword [esi + 0x7c]
mov eax, dword [esi + 0x78]
test ecx, ecx
jne 0x1001bfed
test eax, eax
je 0x1001c11e
mov edi, 0x4000
test ecx, ecx
ja 0x1001c006
jb 0x1001bffc
cmp eax, edi
jae 0x1001c006
mov edi, eax
test edi, edi
je 0x1001c269
mov ecx, dword [esi + 0xc0]
add ecx, dword [esi + 0x40]
mov eax, dword [esi + 0xc4]
adc eax, dword [esi + 0x44]
push 0
push eax
push ecx
push dword [esi + 0xb4]
lea eax, [esi + 0x88]
push eax
call fcn.1001c2a0
add esp, 0x14
test eax, eax
jne 0x1001c254
mov eax, dword [esi + 0x8c]
push edi
push dword [esi]
push dword [esi + 0xb4]
push dword [esi + 0xa4]
call eax
add esp, 0x10
cmp eax, edi
jne 0x1001c254
cmp dword [ebp + 0xe4], 0
je 0x1001c108
xor ecx, ecx
mov dword [esp + 0x14], ecx
test edi, edi
je 0x1001c108
nop word [eax + eax]
mov edx, dword [ebp + 0xf4]
add ecx, dword [esi]
and edx, 0xfffd
or edx, 2
mov eax, edx
xor eax, 1
imul eax, edx
shr eax, 8
xor byte [ecx], al
mov bl, byte [ecx]
mov ecx, dword [ebp + 0xec]
mov edx, dword [ebp + 0xf8]
movsx eax, bl
xor eax, ecx
shr ecx, 8
movzx eax, al
mov eax, dword [edx + eax*4]
xor eax, ecx
mov ecx, dword [ebp + 0xf4]
mov dword [ebp + 0xec], eax
movzx eax, al
add eax, dword [ebp + 0xf0]
imul eax, eax, 0x8088405
inc eax
mov dword [ebp + 0xf0], eax
shr eax, 0x18
xor eax, ecx
shr ecx, 8
movzx eax, al
xor ecx, dword [edx + eax*4]
mov dword [ebp + 0xf4], ecx
mov ecx, dword [esp + 0x14]
mov eax, dword [esi]
mov byte [ecx + eax], bl
inc ecx
mov dword [esp + 0x14], ecx
cmp ecx, edi
jb 0x1001c080
add dword [esi + 0x40], edi
mov eax, dword [esi]
adc dword [esi + 0x44], 0
sub dword [esi + 0x78], edi
mov dword [esi + 4], eax
sbb dword [esi + 0x7c], 0
mov dword [esi + 8], edi
mov eax, dword [esi + 0xb8]
test eax, eax
je 0x1001c1da
cmp dword [esi + 0xc8], 0
jne 0x1001c1da
cmp eax, 0xc
je 0x1001c23e
mov eax, dword [esi + 0x10]
mov edi, dword [esi + 0x18]
mov dword [esp + 0x18], eax
lea eax, [esi + 4]
push 2
push eax
mov dword [esp + 0x1c], edi
call fcn.1001c480
mov ebx, eax
add esp, 8
test ebx, ebx
js 0x1001c170
cmp dword [esi + 0x1c], 0
mov eax, 0xfffffffd
cmovne ebx, eax
mov ebp, dword [esi + 0x18]
xor eax, eax
cmp ebp, edi
jae 0x1001c17f
add ebp, 0
adc eax, 1
mov edi, ebp
sub edi, dword [esp + 0x14]
push edi
push dword [esp + 0x1c]
sbb eax, 0
add dword [esi + 0x68], edi
push dword [esi + 0x70]
adc dword [esi + 0x6c], eax
mov dword [esp + 0x28], eax
call fcn.1001dfb0
add esp, 0xc
mov dword [esi + 0x70], eax
sub dword [esi + 0x80], edi
mov eax, dword [esp + 0x1c]
sbb dword [esi + 0x84], eax
sub ebp, dword [esp + 0x14]
mov eax, dword [esp + 0x10]
add eax, ebp
mov dword [esp + 0x10], eax
cmp ebx, 1
je 0x1001c24c
test ebx, ebx
jne 0x1001c25f
mov ebp, dword [esp + 0x24]
jmp 0x1001c23e
test edi, edi
jne 0x1001c1e6
mov eax, dword [esi + 0x78]
or eax, dword [esi + 0x7c]
je 0x1001c248
mov ebx, dword [esi + 0x14]
cmp ebx, edi
cmovae ebx, edi
xor edx, edx
test ebx, ebx
je 0x1001c205
mov eax, dword [esi + 4]
mov ecx, dword [esi + 0x10]
mov al, byte [edx + eax]
mov byte [edx + ecx], al
inc edx
cmp edx, ebx
jb 0x1001c1f4
add dword [esi + 0x68], ebx
push ebx
push dword [esi + 0x10]
adc dword [esi + 0x6c], 0
push dword [esi + 0x70]
call fcn.1001dfb0
add esp, 0xc
mov dword [esi + 0x70], eax
sub dword [esi + 0x80], ebx
sbb dword [esi + 0x84], 0
sub dword [esi + 8], ebx
sub dword [esi + 0x14], ebx
add dword [esi + 0x10], ebx
add dword [esi + 4], ebx
add dword [esi + 0x18], ebx
add dword [esp + 0x10], ebx
cmp dword [esi + 0x14], 0
ja 0x1001bfd0
mov eax, dword [esp + 0x10]
pop edi
pop ebx
pop esi
pop ebp
add esp, 0x10
ret
pop edi
pop ebx
pop esi
or eax, 0xffffffff
pop ebp
add esp, 0x10
ret
pop edi
mov eax, ebx
pop ebx
pop esi
pop ebp
add esp, 0x10
ret
pop edi
pop ebx
pop esi
xor eax, eax
pop ebp
add esp, 0x10
ret
pop esi
mov eax, 0xffffff9a
pop ebp
add esp, 0x10
ret