public bool GetSectorData(long sector, out byte[] data, out byte[] hash, out byte[] hashCodeResult)
{
if (sector < 0)
{
throw new ArgumentOutOfRangeException("sector");
}
if (sector > m_Sectors)
{
throw new ArgumentOutOfRangeException("sector");
}
if (!File.Exists(m_FilePath) || File.GetLastWriteTime(m_FilePath) != m_LastWriteTime)
{
data = null;
hash = null;
hashCodeResult = null;
return(false);
}
try
{
byte[] readData = new byte[32768];
FileStream fileStream = new FileStream(m_FilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
fileStream.Position = sector * 32768;
int count;
if (fileStream.Position + 32768 <= fileStream.Length)
{
count = 32768;
}
else
{
count = (int)(fileStream.Length - fileStream.Position);
}
fileStream.Read(readData, 0, count);
fileStream.Close();
data = readData;
hash = ComputeHashes.SHA512Compute(data);
// Sicherer Hash ANFANG
hashCodeResult = new byte[64];
for (int n = 0; n < 64; n++)
{
hashCodeResult[n] = (byte)(hash[n] ^ m_FileHash[n]);
}
hashCodeResult = ComputeHashes.SHA512Compute(hashCodeResult);
hashCodeResult = ComputeHashes.SHA512Compute(hashCodeResult);
hashCodeResult = ComputeHashes.SHA512Compute(hashCodeResult);
hashCodeResult = ComputeHashes.SHA512Compute(hashCodeResult);
// Sicherer Hash ENDE
return(true);
}
catch (Exception ex)
{
m_Logger.Log(ex, "An exception was thrown while reading from shared file '{0}'!", m_FileName);
data = null;
hash = null;
hashCodeResult = null;
return(false);
}
}
public SharedFile(string filePath, byte[] fileHash, RIndexedHashtable <string, string> metaData, string comment, byte rating, DateTime?lastRequest)
{
if (filePath == null)
{
throw new ArgumentNullException("filePath");
}
if (fileHash == null)
{
throw new ArgumentNullException("fileHash");
}
if (fileHash.Length != 64)
{
throw new ArgumentException();
}
if (rating > 3)
{
throw new ArgumentOutOfRangeException("rating");
}
if (comment == null)
{
throw new ArgumentNullException("comment");
}
m_FilePath = filePath;
m_DirectoryPath = Path.GetDirectoryName(m_FilePath);
m_FileName = Path.GetFileName(m_FilePath);
m_FileHash = fileHash;
m_FileHashString = Core.ByteArrayToString(m_FileHash);
m_OnceHashedFileHash = ComputeHashes.SHA512Compute(m_FileHash);
m_OnceHashedFileHashString = Core.ByteArrayToString(m_OnceHashedFileHash);
m_TwiceHashedFileHash = ComputeHashes.SHA512Compute(m_OnceHashedFileHash);
m_TwiceHashedFileHashString = Core.ByteArrayToString(m_TwiceHashedFileHash);
m_ThriceHashedFileHash = ComputeHashes.SHA512Compute(m_TwiceHashedFileHash);
m_ThriceHashedFileHashString = Core.ByteArrayToString(m_ThriceHashedFileHash);
m_FileSize = new FileInfo(m_FilePath).Length;
m_FileSizeString = Core.LengthToString(m_FileSize);
m_Sectors = m_FileSize / 32768;
if (metaData.IsEmpty)
{
try
{
switch (Path.GetExtension(m_FilePath))
{
case ".mp3":
FileStream fileStream = new FileStream(m_FilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
ID3v1TagReader id3v1 = new ID3v1TagReader(fileStream);
if (id3v1.HasTag)
{
if (id3v1.HasAlbum && id3v1.Album.Trim() != string.Empty)
{
m_MetaData.Add("Album", id3v1.Album.Trim());
}
if (id3v1.HasArtist && id3v1.Artist.Trim() != string.Empty)
{
m_MetaData.Add("Artist", id3v1.Artist.Trim());
}
if (id3v1.HasTitle && id3v1.Title.Trim() != string.Empty)
{
m_MetaData.Add("Title", id3v1.Title.Trim());
}
}
ID3v2TagTextFrameReader id3v2 = new ID3v2TagTextFrameReader(fileStream);
if (id3v2.HasTag)
{
if (id3v2.Frames.ContainsKey("TALB") && id3v2.Frames["TALB"].Trim() != string.Empty)
{
m_MetaData.Add("TALB", id3v2.Frames["TALB"].Trim());
}
if (id3v2.Frames.ContainsKey("TPE1") && id3v2.Frames["TPE1"].Trim() != string.Empty)
{
m_MetaData.Add("TPE1", id3v2.Frames["TPE1"].Trim());
}
if (id3v2.Frames.ContainsKey("TIT2") && id3v2.Frames["TIT2"].Trim() != string.Empty)
{
m_MetaData.Add("TIT2", id3v2.Frames["TIT2"].Trim());
}
}
fileStream.Close();
break;
default:
FileVersionInfo fileVersionInfo = FileVersionInfo.GetVersionInfo(m_FilePath);
if (fileVersionInfo.CompanyName != null && fileVersionInfo.CompanyName.Trim() != string.Empty)
{
m_MetaData.Add("CompanyName", fileVersionInfo.CompanyName.Trim());
}
if (fileVersionInfo.ProductName != null && fileVersionInfo.ProductName.Trim() != string.Empty)
{
m_MetaData.Add("ProductName", fileVersionInfo.ProductName.Trim());
}
break;
}
}
catch (Exception ex)
{
m_Logger.Log(ex, "An Exception was thrown while gathering meta data!");
}
}
else
{
m_MetaData = metaData;
}
Core.ParseMetaData(m_MetaData, out m_Album, out m_Artist, out m_Title);
m_Rating = rating;
m_Comment = comment;
m_LastRequest = lastRequest;
m_LastWriteTime = File.GetLastWriteTime(m_FilePath);
}