/// <summary> /// Set the zip file comment. /// </summary> /// <param name="comment"> /// The comment text for the entire archive. /// </param> /// <exception name ="ArgumentOutOfRangeException"> /// The converted comment is longer than 0xffff bytes. /// </exception> public void SetComment(string comment) { // TODO: Its not yet clear how to handle unicode comments here. byte[] commentBytes = ZipStrings.ConvertToArray(comment); if (commentBytes.Length > 0xffff) { throw new ArgumentOutOfRangeException(nameof(comment)); } zipComment = commentBytes; }
public static byte[] ConvertToArray(int flags, string str) => ZipStrings.ConvertToArray(flags, str);
public static byte[] ConvertToArray(string str) => ZipStrings.ConvertToArray(str);
/// <summary> /// Finishes the stream. This will write the central directory at the /// end of the zip file and flush the stream. /// </summary> /// <remarks> /// This is automatically called when the stream is closed. /// </remarks> /// <exception cref="System.IO.IOException"> /// An I/O error occurs. /// </exception> /// <exception cref="ZipException"> /// Comment exceeds the maximum length<br/> /// Entry name exceeds the maximum length /// </exception> public override void Finish() { if (entries == null) { return; } if (curEntry != null) { CloseEntry(); } long numEntries = entries.Count; long sizeEntries = 0; foreach (ZipEntry entry in entries) { WriteLeInt(ZipConstants.CentralHeaderSignature); WriteLeShort(ZipConstants.VersionMadeBy); WriteLeShort(entry.Version); WriteLeShort(entry.Flags); WriteLeShort((short)entry.CompressionMethodForHeader); WriteLeInt((int)entry.DosTime); WriteLeInt((int)entry.Crc); if (entry.IsZip64Forced() || (entry.CompressedSize >= uint.MaxValue)) { WriteLeInt(-1); } else { WriteLeInt((int)entry.CompressedSize); } if (entry.IsZip64Forced() || (entry.Size >= uint.MaxValue)) { WriteLeInt(-1); } else { WriteLeInt((int)entry.Size); } byte[] name = ZipStrings.ConvertToArray(entry.Flags, entry.Name); if (name.Length > 0xffff) { throw new ZipException("Name too long."); } var ed = new ZipExtraData(entry.ExtraData); if (entry.CentralHeaderRequiresZip64) { ed.StartNewEntry(); if (entry.IsZip64Forced() || (entry.Size >= 0xffffffff)) { ed.AddLeLong(entry.Size); } if (entry.IsZip64Forced() || (entry.CompressedSize >= 0xffffffff)) { ed.AddLeLong(entry.CompressedSize); } if (entry.Offset >= 0xffffffff) { ed.AddLeLong(entry.Offset); } ed.AddNewEntry(1); } else { ed.Delete(1); } if (entry.AESKeySize > 0) { AddExtraDataAES(entry, ed); } byte[] extra = ed.GetEntryData(); byte[] entryComment = (entry.Comment != null) ? ZipStrings.ConvertToArray(entry.Flags, entry.Comment) : new byte[0]; if (entryComment.Length > 0xffff) { throw new ZipException("Comment too long."); } WriteLeShort(name.Length); WriteLeShort(extra.Length); WriteLeShort(entryComment.Length); WriteLeShort(0); // disk number WriteLeShort(0); // internal file attributes // external file attributes if (entry.ExternalFileAttributes != -1) { WriteLeInt(entry.ExternalFileAttributes); } else { if (entry.IsDirectory) // mark entry as directory (from nikolam.AT.perfectinfo.com) { WriteLeInt(16); } else { WriteLeInt(0); } } if (entry.Offset >= uint.MaxValue) { WriteLeInt(-1); } else { WriteLeInt((int)entry.Offset); } if (name.Length > 0) { BaseOutputStream.Write(name, 0, name.Length); } if (extra.Length > 0) { BaseOutputStream.Write(extra, 0, extra.Length); } if (entryComment.Length > 0) { BaseOutputStream.Write(entryComment, 0, entryComment.Length); } sizeEntries += ZipConstants.CentralHeaderBaseSize + name.Length + extra.Length + entryComment.Length; } using (ZipHelperStream zhs = new ZipHelperStream(BaseOutputStream)) { zhs.WriteEndOfCentralDirectory(numEntries, sizeEntries, offset, zipComment); } entries = null; }
/// <summary> /// Starts a new Zip entry. It automatically closes the previous /// entry if present. /// All entry elements bar name are optional, but must be correct if present. /// If the compression method is stored and the output is not patchable /// the compression for that entry is automatically changed to deflate level 0 /// </summary> /// <param name="entry"> /// the entry. /// </param> /// <exception cref="System.ArgumentNullException"> /// if entry passed is null. /// </exception> /// <exception cref="System.IO.IOException"> /// if an I/O error occured. /// </exception> /// <exception cref="System.InvalidOperationException"> /// if stream was finished /// </exception> /// <exception cref="ZipException"> /// Too many entries in the Zip file<br/> /// Entry name is too long<br/> /// Finish has already been called<br/> /// </exception> public void PutNextEntry(ZipEntry entry) { if (entry == null) { throw new ArgumentNullException(nameof(entry)); } if (entries == null) { throw new InvalidOperationException("ZipOutputStream was finished"); } if (curEntry != null) { CloseEntry(); } if (entries.Count == int.MaxValue) { throw new ZipException("Too many entries for Zip file"); } CompressionMethod method = entry.CompressionMethod; int compressionLevel = defaultCompressionLevel; // Clear flags that the library manages internally entry.Flags &= (int)GeneralBitFlags.UnicodeText; patchEntryHeader = false; bool headerInfoAvailable; // No need to compress - definitely no data. if (entry.Size == 0) { entry.CompressedSize = entry.Size; entry.Crc = 0; method = CompressionMethod.Stored; headerInfoAvailable = true; } else { headerInfoAvailable = (entry.Size >= 0) && entry.HasCrc && entry.CompressedSize >= 0; // Switch to deflation if storing isnt possible. if (method == CompressionMethod.Stored) { if (!headerInfoAvailable) { if (!CanPatchEntries) { // Can't patch entries so storing is not possible. method = CompressionMethod.Deflated; compressionLevel = 0; } } else // entry.size must be > 0 { entry.CompressedSize = entry.Size; headerInfoAvailable = entry.HasCrc; } } } if (headerInfoAvailable == false) { if (CanPatchEntries == false) { // Only way to record size and compressed size is to append a data descriptor // after compressed data. // Stored entries of this form have already been converted to deflating. entry.Flags |= 8; } else { patchEntryHeader = true; } } entry.Offset = offset; entry.CompressionMethod = (CompressionMethod)method; curMethod = method; sizePatchPos = -1; if ((useZip64_ == UseZip64.On) || ((entry.Size < 0) && (useZip64_ == UseZip64.Dynamic))) { entry.ForceZip64(); } // Write the local file header WriteLeInt(ZipConstants.LocalHeaderSignature); WriteLeShort(entry.Version); WriteLeShort(entry.Flags); WriteLeShort((byte)entry.CompressionMethodForHeader); WriteLeInt((int)entry.DosTime); // TODO: Refactor header writing. Its done in several places. if (headerInfoAvailable) { WriteLeInt((int)entry.Crc); if (entry.LocalHeaderRequiresZip64) { WriteLeInt(-1); WriteLeInt(-1); } else { WriteLeInt(entry.IsCrypted ? (int)entry.CompressedSize + ZipConstants.CryptoHeaderSize : (int)entry.CompressedSize); WriteLeInt((int)entry.Size); } } else { if (patchEntryHeader) { crcPatchPos = BaseOutputStream.Position; } WriteLeInt(0); // Crc if (patchEntryHeader) { sizePatchPos = BaseOutputStream.Position; } // For local header both sizes appear in Zip64 Extended Information if (entry.LocalHeaderRequiresZip64 || patchEntryHeader) { WriteLeInt(-1); WriteLeInt(-1); } else { WriteLeInt(0); // Compressed size WriteLeInt(0); // Uncompressed size } } byte[] name = ZipStrings.ConvertToArray(entry.Flags, entry.Name); if (name.Length > 0xFFFF) { throw new ZipException("Entry name too long."); } var ed = new ZipExtraData(entry.ExtraData); if (entry.LocalHeaderRequiresZip64) { ed.StartNewEntry(); if (headerInfoAvailable) { ed.AddLeLong(entry.Size); ed.AddLeLong(entry.CompressedSize); } else { ed.AddLeLong(-1); ed.AddLeLong(-1); } ed.AddNewEntry(1); if (!ed.Find(1)) { throw new ZipException("Internal error cant find extra data"); } if (patchEntryHeader) { sizePatchPos = ed.CurrentReadIndex; } } else { ed.Delete(1); } if (entry.AESKeySize > 0) { AddExtraDataAES(entry, ed); } byte[] extra = ed.GetEntryData(); WriteLeShort(name.Length); WriteLeShort(extra.Length); if (name.Length > 0) { BaseOutputStream.Write(name, 0, name.Length); } if (entry.LocalHeaderRequiresZip64 && patchEntryHeader) { sizePatchPos += BaseOutputStream.Position; } if (extra.Length > 0) { BaseOutputStream.Write(extra, 0, extra.Length); } offset += ZipConstants.LocalHeaderBaseSize + name.Length + extra.Length; // Fix offsetOfCentraldir for AES if (entry.AESKeySize > 0) { offset += entry.AESOverheadSize; } // Activate the entry. curEntry = entry; crc.Reset(); if (method == CompressionMethod.Deflated) { Deflater.Reset(); Deflater.SetLevel(compressionLevel); } size = 0; }