private HierarchicalIntegrityVerificationStream InitIvfcStream(bool enableIntegrityChecks)
{
IvfcHeader ivfc = Header.Ivfc;
const int ivfcLevels = 5;
var initInfo = new IntegrityVerificationInfo[ivfcLevels];
initInfo[0] = new IntegrityVerificationInfo
{
Data = new MemoryStream(Header.MasterHashA),
BlockSizePower = 0,
Type = IntegrityStreamType.Save
};
for (int i = 1; i < ivfcLevels; i++)
{
IvfcLevelHeader level = ivfc.LevelHeaders[i - 1];
Stream data = i == ivfcLevels - 1
? (Stream)JournalStream
: MetaRemapSource.CreateStream(level.LogicalOffset, level.HashDataSize);
initInfo[i] = new IntegrityVerificationInfo
{
Data = data,
BlockSizePower = level.BlockSize,
Salt = new HMACSHA256(Encoding.ASCII.GetBytes(SaltSources[i - 1])).ComputeHash(ivfc.SaltSource),
Type = IntegrityStreamType.Save
};
}
return(new HierarchicalIntegrityVerificationStream(initInfo, enableIntegrityChecks));
}
private static HierarchicalIntegrityVerificationStorage InitIvfcForRomFs(NcaFsIntegrityInfoIvfc ivfc,
IStorage dataStorage, IntegrityCheckLevel integrityCheckLevel, bool leaveOpen)
{
var initInfo = new IntegrityVerificationInfo[ivfc.LevelCount];
initInfo[0] = new IntegrityVerificationInfo
{
Data = new MemoryStorage(ivfc.MasterHash.ToArray()),
BlockSize = 0
};
for (int i = 1; i < ivfc.LevelCount; i++)
{
initInfo[i] = new IntegrityVerificationInfo
{
Data = dataStorage.Slice(ivfc.GetLevelOffset(i - 1), ivfc.GetLevelSize(i - 1)),
BlockSize = 1 << ivfc.GetLevelBlockSize(i - 1),
Type = IntegrityStorageType.RomFs
};
}
return(new HierarchicalIntegrityVerificationStorage(initInfo, integrityCheckLevel, leaveOpen));
}
private static HierarchicalIntegrityVerificationStorage InitIvfcForPartitionFs(NcaFsIntegrityInfoSha256 info,
IStorage pfsStorage, IntegrityCheckLevel integrityCheckLevel, bool leaveOpen)
{
Debug.Assert(info.LevelCount == 2);
IStorage hashStorage = pfsStorage.Slice(info.GetLevelOffset(0), info.GetLevelSize(0), leaveOpen);
IStorage dataStorage = pfsStorage.Slice(info.GetLevelOffset(1), info.GetLevelSize(1), leaveOpen);
var initInfo = new IntegrityVerificationInfo[3];
// Set the master hash
initInfo[0] = new IntegrityVerificationInfo
{
// todo Get hash directly from header
Data = new MemoryStorage(info.MasterHash.ToArray()),
BlockSize = 0,
Type = IntegrityStorageType.PartitionFs
};
initInfo[1] = new IntegrityVerificationInfo
{
Data = hashStorage,
BlockSize = (int)info.GetLevelSize(0),
Type = IntegrityStorageType.PartitionFs
};
initInfo[2] = new IntegrityVerificationInfo
{
Data = dataStorage,
BlockSize = info.BlockSize,
Type = IntegrityStorageType.PartitionFs
};
return(new HierarchicalIntegrityVerificationStorage(initInfo, integrityCheckLevel, leaveOpen));
}
