private static void HandleUnexpectedDataDescriptor(ZipEntry entry)
{
// no seek - stream integrity should be protected by the caller
Stream s = entry.ArchiveStream;
if (ZipSharedUtilities.ReadInt(s) == entry._Crc32)
{
if (ZipSharedUtilities.ReadInt(s) == entry._CompressedSize)
{
if (ZipSharedUtilities.ReadInt(s) != entry._UncompressedSize)
{
s.Seek(-12L, SeekOrigin.Current);
}
}
else
{
s.Seek(-8L, SeekOrigin.Current);
}
}
else
{
s.Seek(-4L, SeekOrigin.Current);
}
}
private void InsureUniqueEntry(ZipEntry ze1)
{
var normalizedName = ZipSharedUtilities.TrimVolumeAndSwapSlashes(ze1.FileName);
if (_entriesIndex.ContainsKey(normalizedName))
{
throw new ArgumentException(String.Format("The entry '{0}' already exists in the zip archive.", ze1.FileName));
}
}
private static void ReadCentralDirectoryFooter(ZipFile zf)
{
// no seek - stream integrity should be protected by the caller
Stream s = zf.ReadStream;
int signature = ZipSharedUtilities.ReadSignature(s);
if (signature != 0x6054b50L)
{
s.Seek(-4L, SeekOrigin.Current);
throw new BadReadException(String.Format(" ZipFile::Read(): Bad signature ({0:X8}) at position 0x{1:X8}", signature, s.Position));
}
byte[] block = new byte[0x10];
zf.ReadStream.Read(block, 0, block.Length);
ReadZipFileComment(zf);
}
internal static String NameInArchive(String filename, String directoryPathInArchive)
{
String result = null;
if (directoryPathInArchive == null)
{
result = filename;
}
else if (String.IsNullOrEmpty(directoryPathInArchive))
{
result = Path.GetFileName(filename);
}
else
{
result = Path.Combine(directoryPathInArchive, Path.GetFileName(filename));
}
return(ZipSharedUtilities.TrimVolumeAndSwapSlashes(result));
}
private static void ReadZipFileComment(ZipFile zf)
{
// no seek - stream integrity should be protected by the caller
byte[] block = new byte[2];
zf.ReadStream.Read(block, 0, block.Length);
short commentLength = (short)(block[0] + (block[1] * 0x100));
if (commentLength > 0)
{
block = new byte[commentLength];
zf.ReadStream.Read(block, 0, block.Length);
if (ZipSharedUtilities.HighBytes(block) && (zf._encoding == Encoding.GetEncoding("ibm437")))
{
zf._encoding = Encoding.UTF8;
}
zf.Comment = ZipSharedUtilities.StringFromBuffer(block, block.Length, zf._encoding);
}
}
private void WriteHeader(Stream s, int cycle)
{
byte[] bytes = new byte[0x2200];
int i = 0;
bytes[i++] = 80;
bytes[i++] = 0x4b;
bytes[i++] = 3;
bytes[i++] = 4;
short VersionNeededToExctract = 20;
bytes[i++] = (byte)(VersionNeededToExctract & 0xff);
bytes[i++] = (byte)((VersionNeededToExctract & 0xff00) >> 8);
byte[] FileNameBytes = this.GetFileNameBytes();
short filenameLength = (short)FileNameBytes.Length;
this._CommentBytes = null;
if (!String.IsNullOrEmpty(this._Comment))
{
this._CommentBytes = this._Comment.ToByteArray(this._encoding);
}
bool setUtf8Bit = this.UseUtf8Encoding && (ZipSharedUtilities.HighBytes(this._CommentBytes) || ZipSharedUtilities.HighBytes(FileNameBytes));
this._BitField = ((short)0);
if (setUtf8Bit)
{
this._BitField = (short)(this._BitField | 0x800);
}
if (!s.CanSeek)
{
this._BitField = (short)(this._BitField | 8);
}
bytes[i++] = (byte)(this._BitField & 0xff);
bytes[i++] = (byte)((this._BitField & 0xff00) >> 8);
if (this.__FileDataPosition == 0L)
{
this._UncompressedSize = 0;
this._CompressedSize = 0;
this._Crc32 = 0;
}
this.FigureCompressionMethodForWriting(cycle);
bytes[i++] = (byte)(this.CompressionMethod & 0xff);
bytes[i++] = (byte)((this.CompressionMethod & 0xff00) >> 8);
this._TimeBlob = ZipSharedUtilities.DateTimeToPacked(this.LastModified);
bytes[i++] = (byte)(this._TimeBlob & 0xff);
bytes[i++] = (byte)((this._TimeBlob & 0xff00) >> 8);
bytes[i++] = (byte)((this._TimeBlob & 0xff0000) >> 0x10);
bytes[i++] = (byte)((this._TimeBlob & 0xff000000L) >> 0x18);
bytes[i++] = (byte)(this._Crc32 & 0xff);
bytes[i++] = (byte)((this._Crc32 & 0xff00) >> 8);
bytes[i++] = (byte)((this._Crc32 & 0xff0000) >> 0x10);
bytes[i++] = (byte)((this._Crc32 & 0xff000000L) >> 0x18);
bytes[i++] = (byte)(this._CompressedSize & 0xff);
bytes[i++] = (byte)((this._CompressedSize & 0xff00) >> 8);
bytes[i++] = (byte)((this._CompressedSize & 0xff0000) >> 0x10);
bytes[i++] = (byte)((this._CompressedSize & 0xff000000L) >> 0x18);
bytes[i++] = (byte)(this._UncompressedSize & 0xff);
bytes[i++] = (byte)((this._UncompressedSize & 0xff00) >> 8);
bytes[i++] = (byte)((this._UncompressedSize & 0xff0000) >> 0x10);
bytes[i++] = (byte)((this._UncompressedSize & 0xff000000L) >> 0x18);
bytes[i++] = (byte)(filenameLength & 0xff);
bytes[i++] = (byte)((filenameLength & 0xff00) >> 8);
byte[] extra = null;
short ExtraFieldLength = (extra == null) ? ((short)0) : ((short)extra.Length);
bytes[i++] = (byte)(ExtraFieldLength & 0xff);
bytes[i++] = (byte)((ExtraFieldLength & 0xff00) >> 8);
int j = 0;
j = 0;
while ((j < FileNameBytes.Length) && ((i + j) < bytes.Length))
{
bytes[i + j] = FileNameBytes[j];
j++;
}
i += j;
if (extra != null)
{
j = 0;
while (j < extra.Length)
{
bytes[i + j] = extra[j];
j++;
}
i += j;
}
CountingStream counter = s as CountingStream;
this._RelativeOffsetOfHeader = (counter != null) ? counter.BytesWritten : ((int)s.Position);
this._LengthOfHeader = i;
s.Write(bytes, 0, i);
this._EntryHeader = new byte[i];
for (j = 0; j < i; j++)
{
this._EntryHeader[j] = bytes[j];
}
}
private static bool ReadHeader(ZipEntry ze, Encoding defaultEncoding)
{
// no seek - stream integrity should be protected by the caller
int bytesRead = 0;
ze._RelativeOffsetOfHeader = (int)ze.ArchiveStream.Position;
int signature = ZipSharedUtilities.ReadSignature(ze.ArchiveStream);
bytesRead += 4;
if (IsNotValidSig(signature))
{
ze.ArchiveStream.Seek(-4L, SeekOrigin.Current);
if (ZipDirEntry.IsNotValidSig(signature) && (signature != 0x6054b50L))
{
throw new BadReadException(String.Format(" ZipEntry::ReadHeader(): Bad signature (0x{0:X8}) at position 0x{1:X8}", signature, ze.ArchiveStream.Position));
}
return(false);
}
byte[] block = new byte[0x1a];
int n = ze.ArchiveStream.Read(block, 0, block.Length);
if (n != block.Length)
{
return(false);
}
bytesRead += n;
int i = 0;
ze._VersionNeeded = (short)(block[i++] + (block[i++] * 0x100));
ze._BitField = (short)(block[i++] + (block[i++] * 0x100));
ze._CompressionMethod = (short)(block[i++] + (block[i++] * 0x100));
ze._TimeBlob = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
ze._LastModified = ZipSharedUtilities.PackedToDateTime(ze._TimeBlob);
if ((ze._BitField & 8) != 8)
{
ze._Crc32 = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
ze._CompressedSize = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
ze._UncompressedSize = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
}
else
{
i += 12;
}
short filenameLength = (short)(block[i++] + (block[i++] * 0x100));
short extraFieldLength = (short)(block[i++] + (block[i++] * 0x100));
block = new byte[filenameLength];
n = ze.ArchiveStream.Read(block, 0, block.Length);
bytesRead += n;
var s1 = ZipSharedUtilities.StringFromBuffer(block, block.Length, Encoding.GetEncoding(1251));
var s2 = ZipSharedUtilities.StringFromBuffer(block, block.Length, Encoding.ASCII);
var s3 = ZipSharedUtilities.StringFromBuffer(block, block.Length, Encoding.UTF8);
var s4 = ZipSharedUtilities.StringFromBuffer(block, block.Length, Encoding.Default);
var s5 = ZipSharedUtilities.StringFromBuffer(block, block.Length, Encoding.GetEncoding(1252));
if ((ze._BitField & 0x800) == 0x800)
{
ze._FileNameInArchive = ZipSharedUtilities.StringFromBuffer(block, block.Length, Encoding.UTF8);
ze.UseUtf8Encoding = true;
}
else
{
ze._FileNameInArchive = ZipSharedUtilities.StringFromBuffer(block, block.Length, defaultEncoding);
ze._encoding = defaultEncoding;
}
ze._LocalFileName = ze._FileNameInArchive;
if (extraFieldLength > 0)
{
ze._Extra = new byte[extraFieldLength];
n = ze.ArchiveStream.Read(ze._Extra, 0, ze._Extra.Length);
bytesRead += n;
}
if (!ze.FileName.EndsWith("/") && ((ze._BitField & 8) == 8))
{
long posn = ze.ArchiveStream.Position;
bool wantMore = true;
long SizeOfDataRead = 0L;
int tries = 0;
while (wantMore)
{
tries++;
long d = ZipSharedUtilities.FindSignature(ze.ArchiveStream, 0x8074b50);
if (d == -1L)
{
return(false);
}
SizeOfDataRead += d;
block = new byte[12];
n = ze.ArchiveStream.Read(block, 0, block.Length);
if (n != 12)
{
return(false);
}
bytesRead += n;
i = 0;
ze._Crc32 = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
ze._CompressedSize = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
ze._UncompressedSize = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
if (SizeOfDataRead != ze._CompressedSize)
{
ze.ArchiveStream.Seek(-12L, SeekOrigin.Current);
SizeOfDataRead += 4L;
}
}
ze.ArchiveStream.Seek(posn, SeekOrigin.Begin);
}
ze._CompressedFileDataSize = ze._CompressedSize;
if ((ze._BitField & 1) == 1)
{
throw new NotSupportedException("Encryption is not supported");
}
ze._TotalEntrySize = bytesRead + ze._CompressedFileDataSize;
ze._LengthOfHeader = bytesRead;
return(true);
}
internal static ZipEntry Create(String filename, String nameInArchive, Stream stream)
{
if (String.IsNullOrEmpty(filename))
{
throw new ZipException("The entry name must be non-null and non-empty.");
}
ZipEntry entry = new ZipEntry();
if (stream != null)
{
entry._sourceStream = stream;
entry._LastModified = DateTime.Now;
}
else
{
entry._LastModified = (File.Exists(filename) || Directory.Exists(filename)) ? ZipSharedUtilities.RoundToEvenSecond(File.GetLastWriteTime(filename)) : DateTime.Now;
if (!(entry._LastModified.IsDaylightSavingTime() || !DateTime.Now.IsDaylightSavingTime()))
{
entry._LastModified += new TimeSpan(1, 0, 0);
}
if (!(!entry._LastModified.IsDaylightSavingTime() || DateTime.Now.IsDaylightSavingTime()))
{
entry._LastModified -= new TimeSpan(1, 0, 0);
}
}
entry._LocalFileName = filename;
entry._FileNameInArchive = nameInArchive.Replace('\\', '/');
return(entry);
}
public static ZipDirEntry Read(Stream s, Encoding expectedEncoding)
{
int signature = ZipSharedUtilities.ReadSignature(s);
if (IsNotValidSig(signature))
{
s.Seek(-4L, SeekOrigin.Current);
if (signature != 0x6054b50L)
{
throw new BadReadException(String.Format(" ZipDirEntry::Read(): Bad signature ({0:X8}) at position 0x{1:X8}", signature, s.Position));
}
return(null);
}
byte[] block = new byte[0x2a];
if (s.Read(block, 0, block.Length) != block.Length)
{
return(null);
}
int i = 0;
ZipDirEntry zde = new ZipDirEntry();
short versionMadeBy = (short)(block[i++] + (block[i++] * 0x100));
short versionNeeded = (short)(block[i++] + (block[i++] * 0x100));
short bitField = (short)(block[i++] + (block[i++] * 0x100));
short compressionMethod = (short)(block[i++] + (block[i++] * 0x100));
int lastModDateTime = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
int crc32 = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
int compressedSize = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
int uncompressedSize = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
short filenameLength = (short)(block[i++] + (block[i++] * 0x100));
short extraFieldLength = (short)(block[i++] + (block[i++] * 0x100));
short commentLength = (short)(block[i++] + (block[i++] * 0x100));
i += 2;
zde._InternalFileAttrs = (short)(block[i++] + (block[i++] * 0x100));
zde._ExternalFileAttrs = ((block[i++] + (block[i++] * 0x100)) + ((block[i++] * 0x100) * 0x100)) + (((block[i++] * 0x100) * 0x100) * 0x100);
block = new byte[filenameLength];
int n = s.Read(block, 0, block.Length);
if ((bitField & 0x800) == 0x800)
{
zde._FileName = ZipSharedUtilities.Utf8StringFromBuffer(block, block.Length);
}
else
{
zde._FileName = ZipSharedUtilities.StringFromBuffer(block, block.Length, expectedEncoding);
}
if (extraFieldLength > 0)
{
zde._Extra = new byte[extraFieldLength];
n = s.Read(zde._Extra, 0, zde._Extra.Length);
}
if (commentLength > 0)
{
block = new byte[commentLength];
n = s.Read(block, 0, block.Length);
if ((bitField & 0x800) == 0x800)
{
zde._Comment = ZipSharedUtilities.Utf8StringFromBuffer(block, block.Length);
}
else
{
zde._Comment = ZipSharedUtilities.StringFromBuffer(block, block.Length, expectedEncoding);
}
}
return(zde);
}
