public static ComputeHash ( ArraySegment |
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value | ArraySegment |
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Résultat | byte[] |
public static byte[] ComputeHash(ArraySegment <byte> value) { if (value.Array == null) { throw new ArgumentNullException("value"); } return(Crc32_Castagnoli.ComputeHash(value.Array, value.Offset, value.Count)); }
public static byte[] ComputeHash(string value) { if (value == null) { throw new ArgumentNullException("value"); } return(Crc32_Castagnoli.ComputeHash(_threadLocalEncoding.Value.GetBytes(value))); }
/// <summary> /// ハッシュを生成する /// </summary> /// <param name="buffer">ハッシュ値を計算するbyte配列</param> public static byte[] ComputeHash(byte[] buffer) { if (buffer == null) { throw new ArgumentNullException("buffer"); } return(Crc32_Castagnoli.ComputeHash(buffer, 0, buffer.Length)); }
public static int GetHashCode(byte[] buffer) { if (buffer == null) { throw new ArgumentNullException("buffer"); } return(BitConverter.ToInt32(Crc32_Castagnoli.ComputeHash( new ArraySegment <byte>[] { new ArraySegment <byte>(_vector), new ArraySegment <byte>(buffer), }), 0)); }
private static Stream ToStream <T>(ItemBase <T> item) where T : ItemBase <T> { Stream stream = null; try { stream = new RangeStream(item.Export(_bufferManager)); List <KeyValuePair <byte, Stream> > list = new List <KeyValuePair <byte, Stream> >(); try { stream.Seek(0, SeekOrigin.Begin); BufferStream deflateBufferStream = null; try { deflateBufferStream = new BufferStream(_bufferManager); using (DeflateStream deflateStream = new DeflateStream(deflateBufferStream, CompressionMode.Compress, true)) { byte[] compressBuffer = null; try { compressBuffer = _bufferManager.TakeBuffer(1024 * 4); int i = -1; while ((i = stream.Read(compressBuffer, 0, compressBuffer.Length)) > 0) { deflateStream.Write(compressBuffer, 0, i); } } finally { if (compressBuffer != null) { _bufferManager.ReturnBuffer(compressBuffer); } } } deflateBufferStream.Seek(0, SeekOrigin.Begin); list.Add(new KeyValuePair <byte, Stream>((byte)ConvertCompressionAlgorithm.Deflate, deflateBufferStream)); } catch (Exception) { if (deflateBufferStream != null) { deflateBufferStream.Dispose(); } } } catch (Exception) { } list.Add(new KeyValuePair <byte, Stream>((byte)ConvertCompressionAlgorithm.None, stream)); list.Sort((x, y) => { int c = x.Value.Length.CompareTo(y.Value.Length); if (c != 0) { return(c); } return(x.Key.CompareTo(y.Key)); }); #if DEBUG if (list[0].Value.Length != stream.Length) { Debug.WriteLine("Library.Security.Converter ToStream : {0}→{1} {2}", NetworkConverter.ToSizeString(stream.Length), NetworkConverter.ToSizeString(list[0].Value.Length), NetworkConverter.ToSizeString(list[0].Value.Length - stream.Length)); } #endif for (int i = 1; i < list.Count; i++) { list[i].Value.Dispose(); } BufferStream headerStream = new BufferStream(_bufferManager); headerStream.WriteByte((byte)list[0].Key); var dataStream = new UniteStream(headerStream, list[0].Value); MemoryStream crcStream = new MemoryStream(Crc32_Castagnoli.ComputeHash(dataStream)); return(new UniteStream(dataStream, crcStream)); } catch (Exception ex) { if (stream != null) { stream.Dispose(); } throw new ArgumentException(ex.Message, ex); } }
private static T FromStream <T>(Stream stream) where T : ItemBase <T> { try { using (var targetStream = new RangeStream(stream, true)) { using (Stream verifyStream = new RangeStream(targetStream, 0, targetStream.Length - 4, true)) { byte[] verifyCrc = Crc32_Castagnoli.ComputeHash(verifyStream); byte[] orignalCrc = new byte[4]; using (RangeStream crcStream = new RangeStream(targetStream, targetStream.Length - 4, 4, true)) { crcStream.Read(orignalCrc, 0, orignalCrc.Length); } if (!Unsafe.Equals(verifyCrc, orignalCrc)) { throw new ArgumentException("Crc Error"); } } targetStream.Seek(0, SeekOrigin.Begin); byte type = (byte)targetStream.ReadByte(); using (Stream dataStream = new RangeStream(targetStream, targetStream.Position, targetStream.Length - targetStream.Position - 4, true)) { if (type == (byte)ConvertCompressionAlgorithm.None) { return(ItemBase <T> .Import(dataStream, _bufferManager)); } else if (type == (byte)ConvertCompressionAlgorithm.Deflate) { using (BufferStream deflateBufferStream = new BufferStream(_bufferManager)) { byte[] decompressBuffer = null; try { decompressBuffer = _bufferManager.TakeBuffer(1024 * 4); using (DeflateStream deflateStream = new DeflateStream(dataStream, CompressionMode.Decompress, true)) { int i = -1; while ((i = deflateStream.Read(decompressBuffer, 0, decompressBuffer.Length)) > 0) { deflateBufferStream.Write(decompressBuffer, 0, i); } } } finally { if (decompressBuffer != null) { _bufferManager.ReturnBuffer(decompressBuffer); } } #if DEBUG Debug.WriteLine("Library.Security.Converter FromStream : {0}→{1} {2}", NetworkConverter.ToSizeString(dataStream.Length), NetworkConverter.ToSizeString(deflateBufferStream.Length), NetworkConverter.ToSizeString(dataStream.Length - deflateBufferStream.Length)); #endif deflateBufferStream.Seek(0, SeekOrigin.Begin); return(ItemBase <T> .Import(deflateBufferStream, _bufferManager)); } } else { throw new ArgumentException("ArgumentException"); } } } } catch (Exception e) { throw new ArgumentException(e.Message, e); } }