private void ProcessAESExtraData(ZipExtraData extraData)
{
if (!extraData.Find(0x9901))
{
throw new ZipException("AES Extra Data missing");
}
versionToExtract = 0x33;
Flags |= 0x40;
int valueLength = extraData.ValueLength;
if (valueLength < 7)
{
throw new ZipException("AES Extra Data Length " + valueLength + " invalid.");
}
extraData.ReadShort();
extraData.ReadShort();
int num3 = extraData.ReadByte();
int num4 = extraData.ReadShort();
_aesEncryptionStrength = num3;
method = (CompressionMethod)num4;
}
private void WriteLocalEntryHeader(ZipUpdate update)
{
ZipEntry outEntry = update.OutEntry;
outEntry.Offset = baseStream_.Position;
if (update.Command != UpdateCommand.Copy)
{
if (outEntry.CompressionMethod == CompressionMethod.Deflated)
{
if (outEntry.Size == 0L)
{
outEntry.CompressedSize = outEntry.Size;
outEntry.Crc = 0L;
outEntry.CompressionMethod = CompressionMethod.Stored;
}
}
else if (outEntry.CompressionMethod == CompressionMethod.Stored)
{
outEntry.Flags &= -9;
}
if (HaveKeys)
{
outEntry.IsCrypted = true;
if (outEntry.Crc < 0L)
{
outEntry.Flags |= 8;
}
}
else
{
outEntry.IsCrypted = false;
}
switch (useZip64_)
{
case UseZip64.On:
outEntry.ForceZip64();
break;
case UseZip64.Dynamic:
if (outEntry.Size < 0L)
{
outEntry.ForceZip64();
}
break;
}
}
WriteLEInt(0x4034b50);
WriteLEShort(outEntry.Version);
WriteLEShort(outEntry.Flags);
WriteLEShort((byte)outEntry.CompressionMethod);
WriteLEInt((int)outEntry.DosTime);
if (!outEntry.HasCrc)
{
update.CrcPatchOffset = baseStream_.Position;
WriteLEInt(0);
}
else
{
WriteLEInt((int)outEntry.Crc);
}
if (outEntry.LocalHeaderRequiresZip64)
{
WriteLEInt(-1);
WriteLEInt(-1);
}
else
{
if ((outEntry.CompressedSize < 0L) || (outEntry.Size < 0L))
{
update.SizePatchOffset = baseStream_.Position;
}
WriteLEInt((int)outEntry.CompressedSize);
WriteLEInt((int)outEntry.Size);
}
byte[] buffer = ZipConstants.ConvertToArray(outEntry.Flags, outEntry.Name);
if (buffer.Length > 0xffff)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData data = new ZipExtraData(outEntry.ExtraData);
if (outEntry.LocalHeaderRequiresZip64)
{
data.StartNewEntry();
data.AddLeLong(outEntry.Size);
data.AddLeLong(outEntry.CompressedSize);
data.AddNewEntry(1);
}
else
{
data.Delete(1);
}
outEntry.ExtraData = data.GetEntryData();
WriteLEShort(buffer.Length);
WriteLEShort(outEntry.ExtraData.Length);
if (buffer.Length > 0)
{
baseStream_.Write(buffer, 0, buffer.Length);
}
if (outEntry.LocalHeaderRequiresZip64)
{
if (!data.Find(1))
{
throw new ZipException("Internal error cannot find extra data");
}
update.SizePatchOffset = baseStream_.Position + data.CurrentReadIndex;
}
if (outEntry.ExtraData.Length > 0)
{
baseStream_.Write(outEntry.ExtraData, 0, outEntry.ExtraData.Length);
}
}
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData extraData = new ZipExtraData(extra);
if (extraData.Find(1))
{
forceZip64_ = true;
if (extraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (localHeader || (size == 0xffffffffL))
{
size = (ulong)extraData.ReadLong();
}
if (localHeader || (compressedSize == 0xffffffffL))
{
compressedSize = (ulong)extraData.ReadLong();
}
if (!localHeader && (offset == 0xffffffffL))
{
offset = extraData.ReadLong();
}
}
else if (((versionToExtract & 0xff) >= 0x2d) && ((size == 0xffffffffL) || (compressedSize == 0xffffffffL)))
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
if (extraData.Find(10))
{
if (extraData.ValueLength < 4)
{
throw new ZipException("NTFS Extra data invalid");
}
extraData.ReadInt();
while (extraData.UnreadCount >= 4)
{
int num = extraData.ReadShort();
int amount = extraData.ReadShort();
if (num == 1)
{
if (amount >= 0x18)
{
long fileTime = extraData.ReadLong();
extraData.ReadLong();
extraData.ReadLong();
DateTime = DateTime.FromFileTime(fileTime);
}
break;
}
extraData.Skip(amount);
}
}
else if (extraData.Find(0x5455))
{
int valueLength = extraData.ValueLength;
if (((extraData.ReadByte() & 1) != 0) && (valueLength >= 5))
{
int seconds = extraData.ReadInt();
DateTime time = new DateTime(0x7b2, 1, 1, 0, 0, 0);
DateTime = (time.ToUniversalTime() + new TimeSpan(0, 0, 0, seconds, 0)).ToLocalTime();
}
}
if (method == CompressionMethod.WinZipAES)
{
ProcessAESExtraData(extraData);
}
}
private int WriteCentralDirectoryHeader(ZipEntry entry)
{
if (entry.CompressedSize < 0L)
{
throw new ZipException("Attempt to write central directory entry with unknown csize");
}
if (entry.Size < 0L)
{
throw new ZipException("Attempt to write central directory entry with unknown size");
}
if (entry.Crc < 0L)
{
throw new ZipException("Attempt to write central directory entry with unknown crc");
}
WriteLEInt(0x2014b50);
WriteLEShort(0x33);
WriteLEShort(entry.Version);
WriteLEShort(entry.Flags);
WriteLEShort((byte)entry.CompressionMethod);
WriteLEInt((int)entry.DosTime);
WriteLEInt((int)entry.Crc);
if (entry.IsZip64Forced() || (entry.CompressedSize >= 0xffffffffL))
{
WriteLEInt(-1);
}
else
{
WriteLEInt((int)(((ulong)entry.CompressedSize) & 0xffffffffL));
}
if (entry.IsZip64Forced() || (entry.Size >= 0xffffffffL))
{
WriteLEInt(-1);
}
else
{
WriteLEInt((int)entry.Size);
}
byte[] buffer = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (buffer.Length > 0xffff)
{
throw new ZipException("Entry name is too long.");
}
WriteLEShort(buffer.Length);
ZipExtraData data = new ZipExtraData(entry.ExtraData);
if (entry.CentralHeaderRequiresZip64)
{
data.StartNewEntry();
if ((entry.Size >= 0xffffffffL) || (useZip64_ == UseZip64.On))
{
data.AddLeLong(entry.Size);
}
if ((entry.CompressedSize >= 0xffffffffL) || (useZip64_ == UseZip64.On))
{
data.AddLeLong(entry.CompressedSize);
}
if (entry.Offset >= 0xffffffffL)
{
data.AddLeLong(entry.Offset);
}
data.AddNewEntry(1);
}
else
{
data.Delete(1);
}
byte[] entryData = data.GetEntryData();
WriteLEShort(entryData.Length);
WriteLEShort((entry.Comment != null) ? entry.Comment.Length : 0);
WriteLEShort(0);
WriteLEShort(0);
if (entry.ExternalFileAttributes != -1)
{
WriteLEInt(entry.ExternalFileAttributes);
}
else if (entry.IsDirectory)
{
WriteLEUint(0x10);
}
else
{
WriteLEUint(0);
}
if (entry.Offset >= 0xffffffffL)
{
WriteLEUint(uint.MaxValue);
}
else
{
WriteLEUint((uint)((int)entry.Offset));
}
if (buffer.Length > 0)
{
baseStream_.Write(buffer, 0, buffer.Length);
}
if (entryData.Length > 0)
{
baseStream_.Write(entryData, 0, entryData.Length);
}
byte[] buffer3 = (entry.Comment != null) ? Encoding.ASCII.GetBytes(entry.Comment) : new byte[0];
if (buffer3.Length > 0)
{
baseStream_.Write(buffer3, 0, buffer3.Length);
}
return (((0x2e + buffer.Length) + entryData.Length) + buffer3.Length);
}
private long TestLocalHeader(ZipEntry entry, HeaderTest tests)
{
lock (baseStream_)
{
bool flag = (tests & HeaderTest.Header) != 0;
bool flag2 = (tests & HeaderTest.Extract) != 0;
baseStream_.Seek(offsetOfFirstEntry + entry.Offset, SeekOrigin.Begin);
if (ReadLEUint() != 0x4034b50)
{
throw new ZipException(string.Format("Wrong local header signature @{0:X}", offsetOfFirstEntry + entry.Offset));
}
short num = (short)ReadLEUshort();
short flags = (short)ReadLEUshort();
short num3 = (short)ReadLEUshort();
short num4 = (short)ReadLEUshort();
short num5 = (short)ReadLEUshort();
uint num6 = ReadLEUint();
long num7 = ReadLEUint();
long num8 = ReadLEUint();
int num9 = ReadLEUshort();
int num10 = ReadLEUshort();
byte[] buffer = new byte[num9];
StreamUtils.ReadFully(baseStream_, buffer);
byte[] buffer2 = new byte[num10];
StreamUtils.ReadFully(baseStream_, buffer2);
ZipExtraData data = new ZipExtraData(buffer2);
if (data.Find(1))
{
num8 = data.ReadLong();
num7 = data.ReadLong();
if ((flags & 8) != 0)
{
if ((num8 != -1L) && (num8 != entry.Size))
{
throw new ZipException("Size invalid for descriptor");
}
if ((num7 != -1L) && (num7 != entry.CompressedSize))
{
throw new ZipException("Compressed size invalid for descriptor");
}
}
}
else if ((num >= 0x2d) && ((((uint)num8) == uint.MaxValue) || (((uint)num7) == uint.MaxValue)))
{
throw new ZipException("Required Zip64 extended information missing");
}
if (flag2 && entry.IsFile)
{
if (!entry.IsCompressionMethodSupported())
{
throw new ZipException("Compression method not supported");
}
if ((num > 0x33) || ((num > 20) && (num < 0x2d)))
{
throw new ZipException(string.Format("Version required to extract this entry not supported ({0})", num));
}
if ((flags & 0x3060) != 0)
{
throw new ZipException("The library does not support the zip version required to extract this entry");
}
}
if (flag)
{
if (((((num <= 0x3f) && (num != 10)) && ((num != 11) && (num != 20))) && (((num != 0x15) && (num != 0x19)) && ((num != 0x1b) && (num != 0x2d)))) && ((((num != 0x2e) && (num != 50)) && ((num != 0x33) && (num != 0x34))) && (((num != 0x3d) && (num != 0x3e)) && (num != 0x3f))))
{
throw new ZipException(string.Format("Version required to extract this entry is invalid ({0})", num));
}
if ((flags & 0xc010) != 0)
{
throw new ZipException("Reserved bit flags cannot be set.");
}
if (((flags & 1) != 0) && (num < 20))
{
throw new ZipException(string.Format("Version required to extract this entry is too low for encryption ({0})", num));
}
if ((flags & 0x40) != 0)
{
if ((flags & 1) == 0)
{
throw new ZipException("Strong encryption flag set but encryption flag is not set");
}
if (num < 50)
{
throw new ZipException(string.Format("Version required to extract this entry is too low for encryption ({0})", num));
}
}
if (((flags & 0x20) != 0) && (num < 0x1b))
{
throw new ZipException(string.Format("Patched data requires higher version than ({0})", num));
}
if (flags != entry.Flags)
{
throw new ZipException("Central header/local header flags mismatch");
}
if (entry.CompressionMethod != ((CompressionMethod)num3))
{
throw new ZipException("Central header/local header compression method mismatch");
}
if (entry.Version != num)
{
throw new ZipException("Extract version mismatch");
}
if (((flags & 0x40) != 0) && (num < 0x3e))
{
throw new ZipException("Strong encryption flag set but version not high enough");
}
if (((flags & 0x2000) != 0) && ((num4 != 0) || (num5 != 0)))
{
throw new ZipException("Header masked set but date/time values non-zero");
}
if (((flags & 8) == 0) && (num6 != ((uint)entry.Crc)))
{
throw new ZipException("Central header/local header crc mismatch");
}
if (((num8 == 0L) && (num7 == 0L)) && (num6 != 0))
{
throw new ZipException("Invalid CRC for empty entry");
}
if (entry.Name.Length > num9)
{
throw new ZipException("File name length mismatch");
}
string name = ZipConstants.ConvertToStringExt(flags, buffer);
if (name != entry.Name)
{
throw new ZipException("Central header and local header file name mismatch");
}
if (entry.IsDirectory)
{
if (num8 > 0L)
{
throw new ZipException("Directory cannot have size");
}
if (entry.IsCrypted)
{
if (num7 > 14L)
{
throw new ZipException("Directory compressed size invalid");
}
}
else if (num7 > 2L)
{
throw new ZipException("Directory compressed size invalid");
}
}
if (!ZipNameTransform.IsValidName(name, true))
{
throw new ZipException("Name is invalid");
}
}
if ((((flags & 8) == 0) || (num8 > 0L)) || (num7 > 0L))
{
if (num8 != entry.Size)
{
throw new ZipException(string.Format("Size mismatch between central header({0}) and local header({1})", entry.Size, num8));
}
if (((num7 != entry.CompressedSize) && (num7 != 0xffffffffL)) && (num7 != -1L))
{
throw new ZipException(string.Format("Compressed size mismatch between central header({0}) and local header({1})", entry.CompressedSize, num7));
}
}
int num11 = num9 + num10;
return (((offsetOfFirstEntry + entry.Offset) + 30L) + num11);
}
}
private static void AddExtraDataAES(ZipEntry entry, ZipExtraData extraData)
{
extraData.StartNewEntry();
extraData.AddLeShort(2);
extraData.AddLeShort(0x4541);
extraData.AddData(entry.AESEncryptionStrength);
extraData.AddLeShort((int)entry.CompressionMethod);
extraData.AddNewEntry(0x9901);
}
public void PutNextEntry(ZipEntry entry)
{
bool hasCrc;
if (entry == null)
{
throw new ArgumentNullException("entry");
}
if (entries == null)
{
throw new InvalidOperationException("ZipOutputStream was finished");
}
if (curEntry != null)
{
CloseEntry();
}
if (entries.Count == 0x7fffffff)
{
throw new ZipException("Too many entries for Zip file");
}
CompressionMethod compressionMethod = entry.CompressionMethod;
int compressionLevel = defaultCompressionLevel;
entry.Flags &= 0x800;
patchEntryHeader = false;
if (entry.Size == 0L)
{
entry.CompressedSize = entry.Size;
entry.Crc = 0L;
compressionMethod = CompressionMethod.Stored;
hasCrc = true;
}
else
{
hasCrc = (entry.Size >= 0L) && entry.HasCrc;
if (compressionMethod == CompressionMethod.Stored)
{
if (!hasCrc)
{
if (!CanPatchEntries)
{
compressionMethod = CompressionMethod.Deflated;
compressionLevel = 0;
}
}
else
{
entry.CompressedSize = entry.Size;
hasCrc = entry.HasCrc;
}
}
}
if (!hasCrc)
{
if (!CanPatchEntries)
{
entry.Flags |= 8;
}
else
{
patchEntryHeader = true;
}
}
if (Password != null)
{
entry.IsCrypted = true;
if (entry.Crc < 0L)
{
entry.Flags |= 8;
}
}
entry.Offset = offset;
entry.CompressionMethod = compressionMethod;
curMethod = compressionMethod;
sizePatchPos = -1L;
if ((useZip64_ == UseZip64.On) || ((entry.Size < 0L) && (useZip64_ == UseZip64.Dynamic)))
{
entry.ForceZip64();
}
WriteLeInt(0x4034b50);
WriteLeShort(entry.Version);
WriteLeShort(entry.Flags);
WriteLeShort((byte)entry.CompressionMethodForHeader);
WriteLeInt((int)entry.DosTime);
if (hasCrc)
{
WriteLeInt((int)entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
WriteLeInt(-1);
WriteLeInt(-1);
}
else
{
WriteLeInt(entry.IsCrypted ? (((int)entry.CompressedSize) + 12) : ((int)entry.CompressedSize));
WriteLeInt((int)entry.Size);
}
}
else
{
if (patchEntryHeader)
{
crcPatchPos = baseOutputStream_.Position;
}
WriteLeInt(0);
if (patchEntryHeader)
{
sizePatchPos = baseOutputStream_.Position;
}
if (entry.LocalHeaderRequiresZip64 || patchEntryHeader)
{
WriteLeInt(-1);
WriteLeInt(-1);
}
else
{
WriteLeInt(0);
WriteLeInt(0);
}
}
byte[] buffer = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (buffer.Length > 0xffff)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData extraData = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64)
{
extraData.StartNewEntry();
if (hasCrc)
{
extraData.AddLeLong(entry.Size);
extraData.AddLeLong(entry.CompressedSize);
}
else
{
extraData.AddLeLong(-1L);
extraData.AddLeLong(-1L);
}
extraData.AddNewEntry(1);
if (!extraData.Find(1))
{
throw new ZipException("Internal error cant find extra data");
}
if (patchEntryHeader)
{
sizePatchPos = extraData.CurrentReadIndex;
}
}
else
{
extraData.Delete(1);
}
if (entry.AESKeySize > 0)
{
AddExtraDataAES(entry, extraData);
}
byte[] entryData = extraData.GetEntryData();
WriteLeShort(buffer.Length);
WriteLeShort(entryData.Length);
if (buffer.Length > 0)
{
baseOutputStream_.Write(buffer, 0, buffer.Length);
}
if (entry.LocalHeaderRequiresZip64 && patchEntryHeader)
{
sizePatchPos += baseOutputStream_.Position;
}
if (entryData.Length > 0)
{
baseOutputStream_.Write(entryData, 0, entryData.Length);
}
offset += (30 + buffer.Length) + entryData.Length;
if (entry.AESKeySize > 0)
{
offset += entry.AESOverheadSize;
}
curEntry = entry;
crc.Reset();
if (compressionMethod == CompressionMethod.Deflated)
{
deflater_.Reset();
deflater_.SetLevel(compressionLevel);
}
size = 0L;
if (entry.IsCrypted)
{
if (entry.AESKeySize > 0)
{
WriteAESHeader(entry);
}
else if (entry.Crc < 0L)
{
WriteEncryptionHeader(entry.DosTime << 0x10);
}
else
{
WriteEncryptionHeader(entry.Crc);
}
}
}
public override void Finish()
{
if (entries != null)
{
if (curEntry != null)
{
CloseEntry();
}
long count = entries.Count;
long sizeEntries = 0L;
foreach (ZipEntry entry in entries)
{
WriteLeInt(0x2014b50);
WriteLeShort(0x33);
WriteLeShort(entry.Version);
WriteLeShort(entry.Flags);
WriteLeShort((short)entry.CompressionMethodForHeader);
WriteLeInt((int)entry.DosTime);
WriteLeInt((int)entry.Crc);
if (entry.IsZip64Forced() || (entry.CompressedSize >= 0xffffffffL))
{
WriteLeInt(-1);
}
else
{
WriteLeInt((int)entry.CompressedSize);
}
if (entry.IsZip64Forced() || (entry.Size >= 0xffffffffL))
{
WriteLeInt(-1);
}
else
{
WriteLeInt((int)entry.Size);
}
byte[] buffer = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (buffer.Length > 0xffff)
{
throw new ZipException("Name too long.");
}
ZipExtraData extraData = new ZipExtraData(entry.ExtraData);
if (entry.CentralHeaderRequiresZip64)
{
extraData.StartNewEntry();
if (entry.IsZip64Forced() || (entry.Size >= 0xffffffffL))
{
extraData.AddLeLong(entry.Size);
}
if (entry.IsZip64Forced() || (entry.CompressedSize >= 0xffffffffL))
{
extraData.AddLeLong(entry.CompressedSize);
}
if (entry.Offset >= 0xffffffffL)
{
extraData.AddLeLong(entry.Offset);
}
extraData.AddNewEntry(1);
}
else
{
extraData.Delete(1);
}
if (entry.AESKeySize > 0)
{
AddExtraDataAES(entry, extraData);
}
byte[] entryData = extraData.GetEntryData();
byte[] buffer3 = (entry.Comment != null) ? ZipConstants.ConvertToArray(entry.Flags, entry.Comment) : new byte[0];
if (buffer3.Length > 0xffff)
{
throw new ZipException("Comment too long.");
}
WriteLeShort(buffer.Length);
WriteLeShort(entryData.Length);
WriteLeShort(buffer3.Length);
WriteLeShort(0);
WriteLeShort(0);
if (entry.ExternalFileAttributes != -1)
{
WriteLeInt(entry.ExternalFileAttributes);
}
else if (entry.IsDirectory)
{
WriteLeInt(0x10);
}
else
{
WriteLeInt(0);
}
if (entry.Offset >= 0xffffffffL)
{
WriteLeInt(-1);
}
else
{
WriteLeInt((int)entry.Offset);
}
if (buffer.Length > 0)
{
baseOutputStream_.Write(buffer, 0, buffer.Length);
}
if (entryData.Length > 0)
{
baseOutputStream_.Write(entryData, 0, entryData.Length);
}
if (buffer3.Length > 0)
{
baseOutputStream_.Write(buffer3, 0, buffer3.Length);
}
sizeEntries += ((0x2e + buffer.Length) + entryData.Length) + buffer3.Length;
}
using (ZipHelperStream stream = new ZipHelperStream(baseOutputStream_))
{
stream.WriteEndOfCentralDirectory(count, sizeEntries, offset, zipComment);
}
entries = null;
}
}
