private void ReadEntries()
{
if (!baseStream_.CanSeek)
{
throw new ZipException("ZipFile stream must be seekable");
}
long endLocation = LocateBlockWithSignature(0x6054b50, baseStream_.Length, 0x16, 0xffff);
if (endLocation < 0L)
{
throw new ZipException("Cannot find central directory");
}
ushort num2 = ReadLEUshort();
ushort num3 = ReadLEUshort();
ulong num4 = ReadLEUshort();
ulong num5 = ReadLEUshort();
ulong num6 = ReadLEUint();
long num7 = ReadLEUint();
uint num8 = ReadLEUshort();
if (num8 > 0)
{
byte[] buffer = new byte[num8];
StreamUtils.ReadFully(baseStream_, buffer);
comment_ = ZipConstants.ConvertToString(buffer);
}
else
{
comment_ = string.Empty;
}
bool flag = false;
if ((((num2 == 0xffff) || (num3 == 0xffff)) || ((num4 == 0xffffL)
|| (num5 == 0xffffL))) || ((num6 == 0xffffffffL) || (num7 == 0xffffffffL)))
{
flag = true;
if (LocateBlockWithSignature(0x7064b50, endLocation, 0, DefaultBufferSize) < 0L)
{
throw new ZipException("Cannot find Zip64 locator");
}
ReadLEUint();
ulong num10 = ReadLEUlong();
ReadLEUint();
baseStream_.Position = (long)num10;
long num11 = ReadLEUint();
if (num11 != 0x6064b50L)
{
throw new ZipException(string.Format("Invalid Zip64 Central directory signature at {0:X}", num10));
}
ReadLEUlong();
ReadLEUshort();
ReadLEUshort();
ReadLEUint();
ReadLEUint();
num4 = ReadLEUlong();
num5 = ReadLEUlong();
num6 = ReadLEUlong();
num7 = (long)ReadLEUlong();
}
entries_ = new ZipEntry[num4];
if (!flag && (num7 < (long)(((ulong)endLocation) - (4L + num6))))
{
offsetOfFirstEntry = endLocation - ((4L + ((long)num6)) + num7);
if (offsetOfFirstEntry <= 0L)
{
throw new ZipException("Invalid embedded zip archive");
}
}
baseStream_.Seek(offsetOfFirstEntry + num7, SeekOrigin.Begin);
for (ulong i = 0L; i < num4; i += (ulong)1L)
{
if (ReadLEUint() != 0x2014b50)
{
throw new ZipException("Wrong Central Directory signature");
}
int madeByInfo = ReadLEUshort();
int versionRequiredToExtract = ReadLEUshort();
int flags = ReadLEUshort();
int num16 = ReadLEUshort();
uint num17 = ReadLEUint();
uint num18 = ReadLEUint();
long num19 = ReadLEUint();
long num20 = ReadLEUint();
int num21 = ReadLEUshort();
int num22 = ReadLEUshort();
int num23 = ReadLEUshort();
ReadLEUshort();
ReadLEUshort();
uint num24 = ReadLEUint();
long num25 = ReadLEUint();
byte[] buffer2 = new byte[Math.Max(num21, num23)];
StreamUtils.ReadFully(baseStream_, buffer2, 0, num21);
ZipEntry entry = new ZipEntry(ZipConstants.ConvertToStringExt(flags, buffer2, num21), versionRequiredToExtract, madeByInfo, (CompressionMethod)num16)
{
Crc = num18 & 0xffffffffL,
Size = num20 & 0xffffffffL,
CompressedSize = num19 & 0xffffffffL,
Flags = flags,
DosTime = num17,
ZipFileIndex = (long)i,
Offset = num25,
ExternalFileAttributes = (int)num24
};
if ((flags & 8) == 0)
{
entry.CryptoCheckValue = (byte)(num18 >> 0x18);
}
else
{
entry.CryptoCheckValue = (byte)((num17 >> 8) & 0xff);
}
if (num22 > 0)
{
byte[] buffer3 = new byte[num22];
StreamUtils.ReadFully(baseStream_, buffer3);
entry.ExtraData = buffer3;
}
entry.ProcessExtraData(false);
if (num23 > 0)
{
StreamUtils.ReadFully(baseStream_, buffer2, 0, num23);
entry.Comment = ZipConstants.ConvertToStringExt(flags, buffer2, num23);
}
entries_[(int)((IntPtr)i)] = entry;
}
}
public ZipEntry GetNextEntry()
{
if (crc == null)
{
throw new InvalidOperationException("Closed.");
}
if (entry != null)
{
CloseEntry();
}
int num = base.inputBuffer.ReadLeInt();
switch (num)
{
case 0x2014b50:
case 0x6054b50:
case 0x5054b50:
case 0x7064b50:
case 0x6064b50:
Close();
return null;
case 0x30304b50:
case 0x8074b50:
num = base.inputBuffer.ReadLeInt();
break;
}
if (num != 0x4034b50)
{
throw new ZipException("Wrong Local header signature: 0x" + string.Format("{0:X}", num));
}
short versionRequiredToExtract = (short)base.inputBuffer.ReadLeShort();
flags = base.inputBuffer.ReadLeShort();
method = base.inputBuffer.ReadLeShort();
uint num3 = (uint)base.inputBuffer.ReadLeInt();
int num4 = base.inputBuffer.ReadLeInt();
base.csize = base.inputBuffer.ReadLeInt();
size = base.inputBuffer.ReadLeInt();
int num5 = base.inputBuffer.ReadLeShort();
int num6 = base.inputBuffer.ReadLeShort();
bool flag = (flags & 1) == 1;
byte[] buffer = new byte[num5];
base.inputBuffer.ReadRawBuffer(buffer);
string name = ZipConstants.ConvertToStringExt(flags, buffer);
entry = new ZipEntry(name, versionRequiredToExtract);
entry.Flags = flags;
entry.CompressionMethod = (CompressionMethod)method;
if ((flags & 8) == 0)
{
entry.Crc = num4 & 0xffffffffL;
entry.Size = size & 0xffffffffL;
entry.CompressedSize = base.csize & 0xffffffffL;
entry.CryptoCheckValue = (byte)((num4 >> 0x18) & 0xff);
}
else
{
if (num4 != 0)
{
entry.Crc = num4 & 0xffffffffL;
}
if (size != 0L)
{
entry.Size = size & 0xffffffffL;
}
if (csize != 0L)
{
entry.CompressedSize = csize & 0xffffffffL;
}
entry.CryptoCheckValue = (byte)((num3 >> 8) & 0xff);
}
entry.DosTime = num3;
if (num6 > 0)
{
byte[] buffer2 = new byte[num6];
inputBuffer.ReadRawBuffer(buffer2);
entry.ExtraData = buffer2;
}
entry.ProcessExtraData(true);
if (entry.CompressedSize >= 0L)
{
base.csize = entry.CompressedSize;
}
if (entry.Size >= 0L)
{
size = entry.Size;
}
if ((method == 0) && ((!flag && (base.csize != size)) || (flag && ((base.csize - 12L) != size))))
{
throw new ZipException("Stored, but compressed != uncompressed");
}
if (entry.IsCompressionMethodSupported())
{
internalReader = InitialRead;
}
else
{
internalReader = ReadingNotSupported;
}
return entry;
}