コード例 #1
0
 public void ReadDataDescriptor(bool zip64, DescriptorData data)
 {
     if (ReadLeInt() != ZipConstants.DataDescriptorSignature)
     {
         throw new ZipException("Data descriptor signature not found");
     }
     data.Crc = ReadLeInt();
     if (zip64)
     {
         data.CompressedSize = ReadLeLong();
         data.Size           = ReadLeLong();
     }
     else
     {
         data.CompressedSize = ReadLeInt();
         data.Size           = ReadLeInt();
     }
 }
コード例 #2
0
ファイル: ZipHelperStream.cs プロジェクト: ouyh18/LtePlatform
 public void ReadDataDescriptor(bool zip64, DescriptorData data)
 {
     if (ReadLeInt() != ZipConstants.DataDescriptorSignature)
     {
         throw new ZipException("Data descriptor signature not found");
     }
     data.Crc = ReadLeInt();
     if (zip64)
     {
         data.CompressedSize = ReadLeLong();
         data.Size = ReadLeLong();
     }
     else
     {
         data.CompressedSize = ReadLeInt();
         data.Size = ReadLeInt();
     }
 }
コード例 #3
0
ファイル: ZipFile.cs プロジェクト: Basilid/Spheres
		/// <summary>
		/// Test an archive for integrity/validity
		/// </summary>
		/// <param name="testData">Perform low level data Crc check</param>
		/// <param name="strategy">The <see cref="TestStrategy"></see> to apply.</param>
		/// <param name="resultHandler">The <see cref="ZipTestResultHandler"></see> handler to call during testing.</param>
		/// <returns>true if all tests pass, false otherwise</returns>
		public bool TestArchive(bool testData, TestStrategy strategy, ZipTestResultHandler resultHandler)
		{
			TestStatus status = new TestStatus(this);

			if ( resultHandler != null ) {
				resultHandler(status, null);
			}

			HeaderTest test = testData ? (HeaderTest.Header | HeaderTest.Extract) : HeaderTest.Header;

			bool testing = true;

			try {
				int entryIndex = 0;

				while ( testing && (entryIndex < Count) ) {
					if ( resultHandler != null ) {
						status.SetEntry(this[entryIndex]);
						status.SetOperation(TestOperation.EntryHeader);
						resultHandler(status, null);
					}

					try	{
						TestLocalHeader(this[entryIndex], test);
					}
					catch(ZipException ex) {
						status.AddError();

						if ( resultHandler != null ) {
							resultHandler(status,
								string.Format("Exception during test - '{0}'", ex.Message));
						}

						if ( strategy == TestStrategy.FindFirstError ) {
							testing = false; 
						}
					}

					if ( testing && testData && this[entryIndex].IsFile ) {
						if ( resultHandler != null ) {
							status.SetOperation(TestOperation.EntryData);
							resultHandler(status, null);
						}

						Stream entryStream = this.GetInputStream(this[entryIndex]);
						
						Crc32 crc = new Crc32();
						byte[] buffer = new byte[4096];
						long totalBytes = 0;
						int bytesRead;
						while ((bytesRead = entryStream.Read(buffer, 0, buffer.Length)) > 0) {
							crc.Update(buffer, 0, bytesRead);

							if ( resultHandler != null ) {
								totalBytes += bytesRead;
								status.SetBytesTested(totalBytes);
								resultHandler(status, null);
							}
						}
	
						if (this[entryIndex].Crc != crc.Value) {
							status.AddError();
							
							if ( resultHandler != null ) {
								resultHandler(status, "CRC mismatch");
							}

							if ( strategy == TestStrategy.FindFirstError ) {
								testing = false;
							}
						}

						if (( this[entryIndex].Flags & (int)GeneralBitFlags.Descriptor) != 0 ) {
							ZipHelperStream helper = new ZipHelperStream(baseStream_);
							DescriptorData data = new DescriptorData();
							helper.ReadDataDescriptor(this[entryIndex].LocalHeaderRequiresZip64, data);
							if (this[entryIndex].Crc != data.Crc) {
								status.AddError();
							}

							if (this[entryIndex].CompressedSize != data.CompressedSize) {
								status.AddError();
							}

							if (this[entryIndex].Size != data.Size) {
								status.AddError();
							}
						}
					}

					if ( resultHandler != null ) {
						status.SetOperation(TestOperation.EntryComplete);
						resultHandler(status, null);
					}

					entryIndex += 1;
				}

				if ( resultHandler != null ) {
					status.SetOperation(TestOperation.MiscellaneousTests);
					resultHandler(status, null);
				}

				// TODO: the 'Corrina Johns' test where local headers are missing from
				// the central directory.  They are therefore invisible to many archivers.
			}
			catch (Exception ex) {
				status.AddError();

				if ( resultHandler != null ) {
					resultHandler(status, string.Format("Exception during test - '{0}'", ex.Message));
				}
			}

			if ( resultHandler != null ) {
				status.SetOperation(TestOperation.Complete);
				status.SetEntry(null);
				resultHandler(status, null);
			}

			return (status.ErrorCount == 0);
		}
コード例 #4
0
ファイル: ZipHelperStream.cs プロジェクト: Basilid/Spheres
		/// <summary>
		/// Read data descriptor at the end of compressed data.
		/// </summary>
		/// <param name="zip64">if set to <c>true</c> [zip64].</param>
		/// <param name="data">The data to fill in.</param>
		/// <returns>Returns the number of bytes read in the descriptor.</returns>
		public void ReadDataDescriptor(bool zip64, DescriptorData data)
		{
			int intValue = ReadLEInt();

			// In theory this may not be a descriptor according to PKZIP appnote.
			// In practise its always there.
			if (intValue != ZipConstants.DataDescriptorSignature) {
				throw new ZipException("Data descriptor signature not found");
			}

			data.Crc = ReadLEInt();
			
			if (zip64) {
				data.CompressedSize = ReadLELong();
				data.Size = ReadLELong();
			}
			else {
				data.CompressedSize = ReadLEInt();
				data.Size = ReadLEInt();
			}
		}
コード例 #5
0
ファイル: ZipFile.cs プロジェクト: ouyh18/LtePlatform
 public bool TestArchive(bool testData, 
     TestStrategy strategy = TestStrategy.FindFirstError, 
     ZipTestResultHandler resultHandler = null)
 {
     if (_isDisposed)
     {
         throw new ObjectDisposedException("ZipFile");
     }
     var status = new TestStatus(this);
     resultHandler?.Invoke(status, null);
     var tests = testData ? (HeaderTest.Header | HeaderTest.Extract) : HeaderTest.Header;
     var flag = true;
     try
     {
         for (var i = 0; flag && (i < Count); i++)
         {
             if (resultHandler != null)
             {
                 status.SetEntry(this[i]);
                 status.SetOperation(TestOperation.EntryHeader);
                 resultHandler(status, null);
             }
             try
             {
                 TestLocalHeader(this[i], tests);
             }
             catch (ZipException exception)
             {
                 status.AddError();
                 resultHandler?.Invoke(status, $"Exception during test - '{exception.Message}'");
                 if (strategy == TestStrategy.FindFirstError)
                 {
                     flag = false;
                 }
             }
             if ((flag && testData) && this[i].IsFile)
             {
                 if (resultHandler != null)
                 {
                     status.SetOperation(TestOperation.EntryData);
                     resultHandler(status, null);
                 }
                 var crc = new Crc32();
                 using (var stream = GetInputStream(this[i]))
                 {
                     int num3;
                     var buffer = new byte[DefaultBufferSize];
                     var num2 = 0L;
                     while ((num3 = stream.Read(buffer, 0, buffer.Length)) > 0)
                     {
                         crc.Update(buffer, 0, num3);
                         if (resultHandler != null)
                         {
                             num2 += num3;
                             status.SetBytesTested(num2);
                             resultHandler(status, null);
                         }
                     }
                 }
                 if (this[i].Crc != crc.Value)
                 {
                     status.AddError();
                     resultHandler?.Invoke(status, "CRC mismatch");
                     if (strategy == TestStrategy.FindFirstError)
                     {
                         flag = false;
                     }
                 }
                 if ((this[i].Flags & 8) != 0)
                 {
                     var stream2 = new ZipHelperStream(_baseStream);
                     var data = new DescriptorData();
                     stream2.ReadDataDescriptor(this[i].LocalHeaderRequiresZip64, data);
                     if (this[i].Crc != data.Crc)
                     {
                         status.AddError();
                     }
                     if (this[i].CompressedSize != data.CompressedSize)
                     {
                         status.AddError();
                     }
                     if (this[i].Size != data.Size)
                     {
                         status.AddError();
                     }
                 }
             }
             if (resultHandler != null)
             {
                 status.SetOperation(TestOperation.EntryComplete);
                 resultHandler(status, null);
             }
         }
         if (resultHandler != null)
         {
             status.SetOperation(TestOperation.MiscellaneousTests);
             resultHandler(status, null);
         }
     }
     catch (Exception exception2)
     {
         status.AddError();
         resultHandler?.Invoke(status, $"Exception during test - '{exception2.Message}'");
     }
     if (resultHandler != null)
     {
         status.SetOperation(TestOperation.Complete);
         status.SetEntry(null);
         resultHandler(status, null);
     }
     return (status.ErrorCount == 0);
 }