Function at 0x437400
Capabilities:
Encode data using xor
Generate random numbers using a mersenne twister

Disassembly:
mov eax, dword [esp + 4]
test eax, eax
push ebx
push ebp
push esi
push edi
jne 0x43754a
lea eax, [ecx + 4]
mov ebp, 0x68
mov esi, dword [eax]
mov ecx, dword [eax - 4]
xor ecx, esi
mov edx, dword [eax - 4]
and ecx, 0x7fffffff
xor ecx, edx
mov edx, ecx
and dl, 1
neg dl
mov edi, dword [eax + 0x630]
sbb edx, edx
and edx, 0x9908b0df
shr ecx, 1
xor edx, ecx
xor edx, edi
mov edi, dword [eax + 4]
mov dword [eax + 0x9bc], edx
mov ecx, esi
xor ecx, edi
and ecx, 0x7fffffff
xor ecx, esi
mov edx, ecx
and dl, 1
neg dl
mov esi, dword [eax + 0x634]
sbb edx, edx
and edx, 0x9908b0df
xor edx, esi
mov esi, dword [eax + 8]
shr ecx, 1
xor edx, ecx
mov dword [eax + 0x9c0], edx
mov ecx, esi
xor ecx, edi
and ecx, 0x7fffffff
xor ecx, edi
mov edi, dword [eax + 0x638]
mov edx, ecx
and dl, 1
neg dl
sbb edx, edx
and edx, 0x9908b0df
xor edx, edi
mov edi, dword [eax + 0xc]
shr ecx, 1
xor edx, ecx
mov dword [eax + 0x9c4], edx
mov ecx, edi
xor ecx, esi
and ecx, 0x7fffffff
xor ecx, esi
mov esi, dword [eax + 0x63c]
mov edx, ecx
and dl, 1
neg dl
sbb edx, edx
and edx, 0x9908b0df
xor edx, esi
mov esi, dword [eax + 0x10]
shr ecx, 1
xor edx, ecx
mov dword [eax + 0x9c8], edx
mov ecx, esi
xor ecx, edi
and ecx, 0x7fffffff
xor ecx, edi
mov edi, dword [eax + 0x640]
mov edx, ecx
and dl, 1
neg dl
sbb edx, edx
and edx, 0x9908b0df
shr ecx, 1
xor edx, edi
xor edx, ecx
mov ecx, dword [eax + 0x14]
xor ecx, esi
and ecx, 0x7fffffff
xor ecx, esi
mov dword [eax + 0x9cc], edx
mov edx, ecx
mov ebx, dword [eax + 0x644]
and dl, 1
neg dl
sbb edx, edx
and edx, 0x9908b0df
xor edx, ebx
shr ecx, 1
xor edx, ecx
mov dword [eax + 0x9d0], edx
add eax, 0x18
dec ebp
jne 0x437418
pop edi
pop esi
pop ebp
pop ebx
ret 4
cmp eax, 1
jne 0x43770d
lea edx, [ecx + 0x9c0]
mov esi, 0xe3
mov edi, edi
mov ebp, dword [edx]
mov eax, dword [edx + 4]
xor eax, ebp
and eax, 0x7fffffff
mov edi, ebp
xor eax, edi
mov edi, dword [edx + 0x634]
mov ebx, eax
and bl, 1
neg bl
sbb ebx, ebx
and ebx, 0x9908b0df
xor ebx, edi
shr eax, 1
xor ebx, eax
mov dword [edx - 0x9c0], ebx
add edx, 4
dec esi
jne 0x437560
lea eax, [ecx + 0xd50]
mov ebp, 0x42
mov esi, dword [eax]
mov edx, dword [eax - 4]
xor edx, esi
mov ebx, dword [eax - 4]
and edx, 0x7fffffff
xor edx, ebx
mov ebx, edx
and bl, 1
neg bl
mov edi, dword [eax + 4]
sbb ebx, ebx
and ebx, 0x9908b0df
shr edx, 1
xor ebx, edx
xor ebx, dword [eax - 0xd50]
mov dword [eax - 0x9c4], ebx
mov edx, edi
xor edx, esi
and edx, 0x7fffffff
xor edx, esi
mov ebx, edx
and bl, 1
neg bl
mov esi, dword [eax - 0xd4c]
sbb ebx, ebx
and ebx, 0x9908b0df
xor ebx, esi
mov esi, dword [eax + 8]
shr edx, 1
xor ebx, edx
mov dword [eax - 0x9c0], ebx
mov edx, esi
xor edx, edi
and edx, 0x7fffffff
xor edx, edi
mov edi, dword [eax - 0xd48]
mov ebx, edx
and bl, 1
neg bl
sbb ebx, ebx
and ebx, 0x9908b0df
xor ebx, edi
mov edi, dword [eax + 0xc]
shr edx, 1
xor ebx, edx
mov dword [eax - 0x9bc], ebx
mov edx, edi
xor edx, esi
and edx, 0x7fffffff
xor edx, esi
mov esi, dword [eax - 0xd44]
mov ebx, edx
and bl, 1
neg bl
sbb ebx, ebx
and ebx, 0x9908b0df
xor ebx, esi
mov esi, dword [eax + 0x10]
shr edx, 1
xor ebx, edx
mov dword [eax - 0x9b8], ebx
mov edx, esi
xor edx, edi
and edx, 0x7fffffff
xor edx, edi
mov edi, dword [eax - 0xd40]
mov ebx, edx
and bl, 1
neg bl
sbb ebx, ebx
and ebx, 0x9908b0df
shr edx, 1
xor ebx, edi
xor ebx, edx
mov edx, dword [eax + 0x14]
xor edx, esi
and edx, 0x7fffffff
xor edx, esi
mov dword [eax - 0x9b4], ebx
mov ebx, edx
mov edi, dword [eax - 0xd3c]
and bl, 1
neg bl
sbb ebx, ebx
and ebx, 0x9908b0df
xor ebx, edi
shr edx, 1
xor ebx, edx
mov dword [eax - 0x9b0], ebx
add eax, 0x18
dec ebp
jne 0x4375a2
mov edx, dword [ecx]
mov eax, dword [ecx + 0x137c]
mov ebx, dword [ecx + 0x137c]
xor eax, edx
and eax, 0x7fffffff
xor eax, ebx
mov ebx, dword [ecx + 0x630]
mov edx, eax
and dl, 1
neg dl
mov dword [ecx + 0x1380], 0
sbb edx, edx
and edx, 0x9908b0df
xor edx, ebx
shr eax, 1
xor edx, eax
mov dword [ecx + 0x9bc], edx
pop edi
pop esi
pop ebp
pop ebx
ret 4