public Result Verify()
{
// Get the obfuscated metadata.
uint size = Size;
byte keyGeneration = KeyGeneration;
// Check that size is big enough for the header.
if (size < Unsafe.SizeOf <Package2Header>())
{
return(ResultLibHac.InvalidPackage2MetaSizeA.Log());
}
// Check that the size isn't larger than what we allow.
if (size > Package2Header.Package2SizeMax)
{
return(ResultLibHac.InvalidPackage2MetaSizeB.Log());
}
// Check that the key generation is one that we can use.
if (keyGeneration >= 0x20)
{
return(ResultLibHac.InvalidPackage2MetaKeyGeneration.Log());
}
// Check the magic number.
if (Magic != ExpectedMagicValue)
{
return(ResultLibHac.InvalidPackage2MetaMagic.Log());
}
// Check the payload alignments.
if (EntryPoint % Package2Header.PayloadAlignment != 0)
{
return(ResultLibHac.InvalidPackage2MetaEntryPointAlignment.Log());
}
for (int i = 0; i < Package2Header.PayloadCount; i++)
{
if (PayloadSizes[i] % Package2Header.PayloadAlignment != 0)
{
return(ResultLibHac.InvalidPackage2MetaPayloadSizeAlignment.Log());
}
}
// Check that the sizes sum to the total.
if (Size != Unsafe.SizeOf <Package2Header>() + PayloadSizes[0] + PayloadSizes[1] + PayloadSizes[2])
{
return(ResultLibHac.InvalidPackage2MetaTotalSize.Log());
}
// Check that the payloads do not overflow.
for (int i = 0; i < Package2Header.PayloadCount; i++)
{
if (PayloadOffsets[i] > PayloadOffsets[i] + PayloadSizes[i])
{
return(ResultLibHac.InvalidPackage2MetaPayloadSize.Log());
}
}
// Verify that no payloads overlap.
for (int i = 0; i < Package2Header.PayloadCount - 1; i++)
{
for (int j = i + 1; j < Package2Header.PayloadCount; j++)
{
if (Overlap.HasOverlap(PayloadOffsets[i], PayloadSizes[i], PayloadOffsets[j], PayloadSizes[j]))
{
return(ResultLibHac.InvalidPackage2MetaPayloadsOverlap.Log());
}
}
}
// Check whether any payload contains the entrypoint.
for (int i = 0; i < Package2Header.PayloadCount; i++)
{
if (Overlap.Contains(PayloadOffsets[i], PayloadSizes[i], EntryPoint))
{
return(Result.Success);
}
}
// No payload contains the entrypoint, so we're not valid.
return(ResultLibHac.InvalidPackage2MetaEntryPointNotFound.Log());
}
