public HierarchicalIntegrityVerificationStream(IntegrityVerificationInfo[] levelInfo, bool enableIntegrityChecks)
{
Levels = new Stream[levelInfo.Length];
EnableIntegrityChecks = enableIntegrityChecks;
Levels[0] = levelInfo[0].Data;
for (int i = 1; i < Levels.Length; i++)
{
var levelData = new IntegrityVerificationStream(levelInfo[i], Levels[i - 1], enableIntegrityChecks);
Levels[i] = new RandomAccessSectorStream(levelData);
}
DataLevel = Levels[Levels.Length - 1];
}
public HierarchicalIntegrityVerificationStream(IntegrityVerificationInfo[] levelInfo, IntegrityCheckLevel integrityCheckLevel)
{
Levels = new Stream[levelInfo.Length];
IntegrityCheckLevel = integrityCheckLevel;
LevelValidities = new Validity[levelInfo.Length - 1][];
IntegrityStreams = new IntegrityVerificationStream[levelInfo.Length - 1];
Levels[0] = levelInfo[0].Data;
for (int i = 1; i < Levels.Length; i++)
{
var levelData = new IntegrityVerificationStream(levelInfo[i], Levels[i - 1], integrityCheckLevel);
Levels[i] = new RandomAccessSectorStream(levelData);
LevelValidities[i - 1] = levelData.BlockValidities;
IntegrityStreams[i - 1] = levelData;
}
DataLevel = Levels[Levels.Length - 1];
}
/// <summary>
/// Checks the hashes of any unchecked blocks and returns the <see cref="Validity"/> of the data.
/// </summary>
/// <param name="returnOnError">If <see langword="true"/>, return as soon as an invalid block is found.</param>
/// <param name="logger">An optional <see cref="IProgressReport"/> for reporting progress.</param>
/// <returns>The <see cref="Validity"/> of the data of the specified hash level.</returns>
public Validity Validate(bool returnOnError, IProgressReport logger = null)
{
Validity[] validities = LevelValidities[LevelValidities.Length - 1];
IntegrityVerificationStream stream = IntegrityStreams[IntegrityStreams.Length - 1];
// Restore the original position of the stream when we're done validating
long initialPosition = stream.Position;
long blockSize = stream.SectorSize;
int blockCount = (int)Util.DivideByRoundUp(Length, blockSize);
var buffer = new byte[blockSize];
var result = Validity.Valid;
logger?.SetTotal(blockCount);
for (int i = 0; i < blockCount; i++)
{
if (validities[i] == Validity.Unchecked)
{
stream.Position = blockSize * i;
stream.Read(buffer, 0, buffer.Length, IntegrityCheckLevel.IgnoreOnInvalid);
}
if (validities[i] == Validity.Invalid)
{
result = Validity.Invalid;
if (returnOnError)
{
break;
}
}
logger?.ReportAdd(1);
}
logger?.SetTotal(0);
stream.Position = initialPosition;
return(result);
}