| public static ConvertToString ( byte data ) : string | ||
| data | byte | /// Byte array to convert /// |
| return | string | |
public static string ConvertToString(byte[] data)
{
if (data == null)
{
return(string.Empty);
}
return(ZipConstants.ConvertToString(data, data.Length));
}
public static string ConvertToStringExt(int flags, byte[] data)
{
if (data == null)
{
return(string.Empty);
}
if ((flags & 2048) != 0)
{
return(Encoding.UTF8.GetString(data, 0, data.Length));
}
return(ZipConstants.ConvertToString(data, data.Length));
}
public static string ConvertToStringExt(int flags, byte[] data, int count)
{
if (data == null)
{
return(string.Empty);
}
if ((flags & 2048) != 0)
{
return(UnitySerializer.TextEncoding.GetString(data, 0, count));
}
return(ZipConstants.ConvertToString(data, count));
}
/// <summary>
/// Search for and read the central directory of a zip file filling the entries
/// array. This is called exactly once by the constructors.
/// </summary>
/// <exception cref="System.IO.IOException">
/// An i/o error occurs.
/// </exception>
/// <exception cref="ICSharpCode.SharpZipLib.Zip.ZipException">
/// The central directory is malformed or cannot be found
/// </exception>
void ReadEntries()
{
// Search for the End Of Central Directory. When a zip comment is
// present the directory may start earlier.
//
// TODO: The search is limited to 64K which is the maximum size of a trailing comment field to aid speed.
// This should be compatible with both SFX and ZIP files but has only been tested for Zip files
// Need to confirm this is valid in all cases.
// Could also speed this up by reading memory in larger blocks.
if (baseStream.CanSeek == false)
{
throw new ZipException("ZipFile stream must be seekable");
}
long locatedCentralDirOffset = LocateBlockWithSignature(ZipConstants.ENDSIG, baseStream.Length, ZipConstants.ENDHDR, 0xffff);
if (locatedCentralDirOffset < 0)
{
throw new ZipException("Cannot find central directory");
}
int thisDiskNumber = ReadLeShort();
int startCentralDirDisk = ReadLeShort();
int entriesForThisDisk = ReadLeShort();
int entriesForWholeCentralDir = ReadLeShort();
int centralDirSize = ReadLeInt();
int offsetOfCentralDir = ReadLeInt();
int commentSize = ReadLeShort();
byte[] zipComment = new byte[commentSize];
baseStream.Read(zipComment, 0, zipComment.Length);
comment = ZipConstants.ConvertToString(zipComment);
/* Its seems possible that this is too strict, more digging required.
* if (thisDiskNumber != 0 || startCentralDirDisk != 0 || entriesForThisDisk != entriesForWholeCentralDir) {
* throw new ZipException("Spanned archives are not currently handled");
* }
*/
entries = new ZipEntry[entriesForWholeCentralDir];
// SFX support, find the offset of the first entry vis the start of the stream
// This applies to Zip files that are appended to the end of the SFX stub.
// Zip files created by some archivers have the offsets altered to reflect the true offsets
// and so dont require any adjustment here...
if (offsetOfCentralDir < locatedCentralDirOffset - (4 + centralDirSize))
{
offsetOfFirstEntry = locatedCentralDirOffset - (4 + centralDirSize + offsetOfCentralDir);
if (offsetOfFirstEntry <= 0)
{
throw new ZipException("Invalid SFX file");
}
}
baseStream.Seek(offsetOfFirstEntry + offsetOfCentralDir, SeekOrigin.Begin);
for (int i = 0; i < entriesForThisDisk; i++)
{
if (ReadLeInt() != ZipConstants.CENSIG)
{
throw new ZipException("Wrong Central Directory signature");
}
int versionMadeBy = ReadLeShort();
int versionToExtract = ReadLeShort();
int bitFlags = ReadLeShort();
int method = ReadLeShort();
int dostime = ReadLeInt();
int crc = ReadLeInt();
int csize = ReadLeInt();
int size = ReadLeInt();
int nameLen = ReadLeShort();
int extraLen = ReadLeShort();
int commentLen = ReadLeShort();
int diskStartNo = ReadLeShort(); // Not currently used
int internalAttributes = ReadLeShort(); // Not currently used
int externalAttributes = ReadLeInt();
int offset = ReadLeInt();
byte[] buffer = new byte[Math.Max(nameLen, commentLen)];
baseStream.Read(buffer, 0, nameLen);
string name = ZipConstants.ConvertToString(buffer, nameLen);
ZipEntry entry = new ZipEntry(name, versionToExtract, versionMadeBy);
entry.CompressionMethod = (CompressionMethod)method;
entry.Crc = crc & 0xffffffffL;
entry.Size = size & 0xffffffffL;
entry.CompressedSize = csize & 0xffffffffL;
entry.Flags = bitFlags;
entry.DosTime = (uint)dostime;
if (extraLen > 0)
{
byte[] extra = new byte[extraLen];
baseStream.Read(extra, 0, extraLen);
entry.ExtraData = extra;
}
if (commentLen > 0)
{
baseStream.Read(buffer, 0, commentLen);
entry.Comment = ZipConstants.ConvertToString(buffer, commentLen);
}
entry.ZipFileIndex = i;
entry.Offset = offset;
entry.ExternalFileAttributes = externalAttributes;
entries[i] = entry;
}
}
/// <summary>
/// Open the next entry from the zip archive, and return its description.
/// If the previous entry wasn't closed, this method will close it.
/// </summary>
public ZipEntry GetNextEntry()
{
if (crc == null)
{
throw new InvalidOperationException("Closed.");
}
if (entry != null)
{
CloseEntry();
}
if (this.cryptbuffer != null)
{
if (avail == 0 && inf.RemainingInput != 0)
{
avail = inf.RemainingInput - 16;
inf.Reset();
}
baseInputStream.Position -= this.len;
baseInputStream.Read(this.buf, 0, this.len);
}
int header = ReadLeInt();
// -jr- added end sig for empty zip files, Zip64 end sig and digital sig for files that have them...
if (header == ZipConstants.CENSIG ||
header == ZipConstants.ENDSIG ||
header == ZipConstants.CENDIGITALSIG ||
header == ZipConstants.CENSIG64)
{
// Central Header reached or end of empty zip file
Close();
return(null);
}
// -jr- 07-Dec-2003 ignore spanning temporary signatures if found
// SPANNINGSIG is same as descriptor signature and is untested as yet.
if (header == ZipConstants.SPANTEMPSIG || header == ZipConstants.SPANNINGSIG)
{
header = ReadLeInt();
}
if (header != ZipConstants.LOCSIG)
{
throw new ZipException("Wrong Local header signature: 0x" + String.Format("{0:X}", header));
}
short version = (short)ReadLeShort();
flags = ReadLeShort();
method = ReadLeShort();
uint dostime = (uint)ReadLeInt();
int crc2 = ReadLeInt();
csize = ReadLeInt();
size = ReadLeInt();
int nameLen = ReadLeShort();
int extraLen = ReadLeShort();
bool isCrypted = (flags & 1) == 1;
if (method == ZipOutputStream.STORED && (!isCrypted && csize != size || (isCrypted && csize - 12 != size)))
{
throw new ZipException("Stored, but compressed != uncompressed");
}
byte[] buffer = new byte[nameLen];
ReadFully(buffer);
string name = ZipConstants.ConvertToString(buffer);
entry = new ZipEntry(name);
entry.IsCrypted = isCrypted;
entry.Version = (ushort)version;
if (method != 0 && method != 8)
{
throw new ZipException("unknown compression method " + method);
}
entry.CompressionMethod = (CompressionMethod)method;
if ((flags & 8) == 0)
{
entry.Crc = crc2 & 0xFFFFFFFFL;
entry.Size = size & 0xFFFFFFFFL;
entry.CompressedSize = csize & 0xFFFFFFFFL;
}
entry.DosTime = dostime;
if (extraLen > 0)
{
byte[] extra = new byte[extraLen];
ReadFully(extra);
entry.ExtraData = extra;
}
// test for encryption
if (isCrypted)
{
if (password == null)
{
throw new ZipException("No password set.");
}
InitializePassword(password);
cryptbuffer = new byte[12];
ReadFully(cryptbuffer);
DecryptBlock(cryptbuffer, 0, cryptbuffer.Length);
if ((flags & 8) == 0) // -jr- 10-Feb-2004 Dont yet know correct size here....
{
csize -= 12;
}
}
else
{
cryptbuffer = null;
}
if (method == ZipOutputStream.DEFLATED && avail > 0)
{
System.Array.Copy(buf, len - (int)avail, buf, 0, (int)avail);
len = (int)avail;
avail = 0;
if (isCrypted)
{
DecryptBlock(buf, 0, Math.Min((int)csize, len));
}
inf.SetInput(buf, 0, len);
}
return(entry);
}
/// <summary>
/// Advances to the next entry in the archive
/// </summary>
/// <returns>
/// The next <see cref="ZipEntry">entry</see> in the archive or null if there are no more entries.
/// </returns>
/// <remarks>
/// If the previous entry is still open <see cref="CloseEntry">CloseEntry</see> is called.
/// </remarks>
/// <exception cref="InvalidOperationException">
/// Input stream is closed
/// </exception>
/// <exception cref="ZipException">
/// Password is not set, password is invalid, compression method is invalid,
/// version required to extract is not supported
/// </exception>
public ZipEntry GetNextEntry()
{
if (crc == null)
{
throw new InvalidOperationException("Closed.");
}
if (entry != null)
{
CloseEntry();
}
var header = inputBuffer.ReadLeInt();
if (header == ZipConstants.CENSIG ||
header == ZipConstants.ENDSIG ||
header == ZipConstants.CENDIGITALSIG ||
header == ZipConstants.CENSIG64)
{
// No more individual entries exist
Close();
return(null);
}
// -jr- 07-Dec-2003 Ignore spanning temporary signatures if found
// SPANNINGSIG is same as descriptor signature and is untested as yet.
if (header == ZipConstants.SPANTEMPSIG || header == ZipConstants.SPANNINGSIG)
{
header = inputBuffer.ReadLeInt();
}
if (header != ZipConstants.LOCSIG)
{
throw new ZipException("Wrong Local header signature: 0x" + $"{header:X}");
}
var versionRequiredToExtract = (short)inputBuffer.ReadLeShort();
flags = inputBuffer.ReadLeShort();
method = inputBuffer.ReadLeShort();
var dostime = (uint)inputBuffer.ReadLeInt();
var crc2 = inputBuffer.ReadLeInt();
csize = inputBuffer.ReadLeInt();
size = inputBuffer.ReadLeInt();
var nameLen = inputBuffer.ReadLeShort();
var extraLen = inputBuffer.ReadLeShort();
var isCrypted = (flags & 1) == 1;
var buffer = new byte[nameLen];
inputBuffer.ReadRawBuffer(buffer);
var name = ZipConstants.ConvertToString(buffer);
entry = new ZipEntry(name, versionRequiredToExtract);
entry.Flags = flags;
if (method == (int)CompressionMethod.Stored && (!isCrypted && csize != size || (isCrypted && csize - ZipConstants.CRYPTO_HEADER_SIZE != size)))
{
throw new ZipException("Stored, but compressed != uncompressed");
}
if (method != (int)CompressionMethod.Stored && method != (int)CompressionMethod.Deflated)
{
throw new ZipException("Unknown compression method " + method);
}
entry.CompressionMethod = (CompressionMethod)method;
if ((flags & 8) == 0)
{
entry.Crc = crc2 & 0xFFFFFFFFL;
entry.Size = size & 0xFFFFFFFFL;
entry.CompressedSize = csize & 0xFFFFFFFFL;
}
else
{
// This allows for GNU, WinZip and possibly other archives, the PKZIP spec says these are zero
// under these circumstances.
if (crc2 != 0)
{
entry.Crc = crc2 & 0xFFFFFFFFL;
}
if (size != 0)
{
entry.Size = size & 0xFFFFFFFFL;
}
if (csize != 0)
{
entry.CompressedSize = csize & 0xFFFFFFFFL;
}
}
entry.DosTime = dostime;
if (extraLen > 0)
{
var extra = new byte[extraLen];
inputBuffer.ReadRawBuffer(extra);
entry.ExtraData = extra;
}
internalReader = InitialRead;
return(entry);
}
/// <summary>
/// Search for and read the central directory of a zip file filling the entries
/// array. This is called exactly once by the constructors.
/// </summary>
/// <exception cref="System.IO.IOException">
/// An i/o error occurs.
/// </exception>
/// <exception cref="ICSharpCode.SharpZipLib.ZipException">
/// The central directory is malformed or cannot be found
/// </exception>
void ReadEntries()
{
// Search for the End Of Central Directory. When a zip comment is
// present the directory may start earlier.
//
// TODO: The search is limited to 64K which is the maximum size of a trailing comment field to aid speed.
// This should be compatible with both SFX and ZIP files but has only been tested for Zip files
// Need to confirm this is valid in all cases.
// Could also speed this up by reading memory in larger blocks?
if (baseStream.CanSeek == false)
{
throw new ZipException("ZipFile stream must be seekable");
}
long pos = baseStream.Length - ZipConstants.ENDHDR;
if (pos <= 0)
{
throw new ZipException("File is too small to be a Zip file");
}
long giveUpMarker = Math.Max(pos - 0x10000, 0);
do
{
if (pos < giveUpMarker)
{
throw new ZipException("central directory not found, probably not a zip file");
}
baseStream.Seek(pos--, SeekOrigin.Begin);
} while (ReadLeInt() != ZipConstants.ENDSIG);
int thisDiskNumber = ReadLeShort();
int startCentralDirDisk = ReadLeShort();
int entriesForThisDisk = ReadLeShort();
int entriesForWholeCentralDir = ReadLeShort();
int centralDirSize = ReadLeInt();
int offsetOfCentralDir = ReadLeInt();
int commentSize = ReadLeShort();
byte[] zipComment = new byte[commentSize];
baseStream.Read(zipComment, 0, zipComment.Length);
comment = ZipConstants.ConvertToString(zipComment);
/* Its seems possible that this is too strict, more digging required.
* if (thisDiskNumber != 0 || startCentralDirDisk != 0 || entriesForThisDisk != entriesForWholeCentralDir) {
* throw new ZipException("Spanned archives are not currently handled");
* }
*/
entries = new ZipEntry[entriesForWholeCentralDir];
baseStream.Seek(offsetOfCentralDir, SeekOrigin.Begin);
for (int i = 0; i < entriesForWholeCentralDir; i++)
{
if (ReadLeInt() != ZipConstants.CENSIG)
{
throw new ZipException("Wrong Central Directory signature");
}
int versionMadeBy = ReadLeShort();
int versionToExtract = ReadLeShort();
int bitFlags = ReadLeShort();
int method = ReadLeShort();
int dostime = ReadLeInt();
int crc = ReadLeInt();
int csize = ReadLeInt();
int size = ReadLeInt();
int nameLen = ReadLeShort();
int extraLen = ReadLeShort();
int commentLen = ReadLeShort();
int diskStartNo = ReadLeShort(); // Not currently used
int internalAttributes = ReadLeShort(); // Not currently used
int externalAttributes = ReadLeInt();
int offset = ReadLeInt();
byte[] buffer = new byte[Math.Max(nameLen, commentLen)];
baseStream.Read(buffer, 0, nameLen);
string name = ZipConstants.ConvertToString(buffer, nameLen);
ZipEntry entry = new ZipEntry(name, versionToExtract, versionMadeBy);
entry.CompressionMethod = (CompressionMethod)method;
entry.Crc = crc & 0xffffffffL;
entry.Size = size & 0xffffffffL;
entry.CompressedSize = csize & 0xffffffffL;
entry.DosTime = (uint)dostime;
if (extraLen > 0)
{
byte[] extra = new byte[extraLen];
baseStream.Read(extra, 0, extraLen);
entry.ExtraData = extra;
}
if (commentLen > 0)
{
baseStream.Read(buffer, 0, commentLen);
entry.Comment = ZipConstants.ConvertToString(buffer, commentLen);
}
entry.ZipFileIndex = i;
entry.Offset = offset;
entry.ExternalFileAttributes = externalAttributes;
entries[i] = entry;
}
}
/// <summary>
/// Read the central directory of a zip file and fill the entries
/// array. This is called exactly once by the constructors.
/// </summary>
/// <exception name="System.IO.IOException">
/// if a i/o error occured.
/// </exception>
/// <exception name="ICSharpCode.SharpZipLib.ZipException">
/// if the central directory is malformed
/// </exception>
void ReadEntries()
{
/* Search for the End Of Central Directory. When a zip comment is
* present the directory may start earlier.
* FIXME: This searches the whole file in a very slow manner if the
* file isn't a zip file.
*/
long pos = baseStream.Length - ZipConstants.ENDHDR;
do
{
if (pos < 0)
{
throw new ZipException("central directory not found, probably not a zip file");
}
baseStream.Seek(pos--, SeekOrigin.Begin);
} while (ReadLeInt() != ZipConstants.ENDSIG);
long oldPos = baseStream.Position;
baseStream.Position += ZipConstants.ENDTOT - ZipConstants.ENDNRD;
if (baseStream.Position - oldPos != ZipConstants.ENDTOT - ZipConstants.ENDNRD)
{
throw new EndOfStreamException();
}
int count = ReadLeShort();
oldPos = baseStream.Position;
baseStream.Position += ZipConstants.ENDOFF - ZipConstants.ENDSIZ;
if (baseStream.Position - oldPos != ZipConstants.ENDOFF - ZipConstants.ENDSIZ)
{
throw new EndOfStreamException();
}
int centralOffset = ReadLeInt();
// GET COMMENT SIZE (COMES AFTER CENTRALOFFSET)
int commentSize = ReadLeShort();
byte[] zipComment = new byte[commentSize];
baseStream.Read(zipComment, 0, zipComment.Length);
comment = ZipConstants.ConvertToString(zipComment);
entries = new ZipEntry[count];
baseStream.Seek(centralOffset, SeekOrigin.Begin);
for (int i = 0; i < count; i++)
{
if (ReadLeInt() != ZipConstants.CENSIG)
{
throw new ZipException("Wrong Central Directory signature");
}
oldPos = baseStream.Position;
baseStream.Position += ZipConstants.CENHOW - ZipConstants.CENVEM;
if (baseStream.Position - oldPos != ZipConstants.CENHOW - ZipConstants.CENVEM)
{
throw new EndOfStreamException();
}
int method = ReadLeShort();
int dostime = ReadLeInt();
int crc = ReadLeInt();
int csize = ReadLeInt();
int size = ReadLeInt();
int nameLen = ReadLeShort();
int extraLen = ReadLeShort();
int commentLen = ReadLeShort();
oldPos = baseStream.Position;
baseStream.Position += ZipConstants.CENOFF - ZipConstants.CENDSK;
if (baseStream.Position - oldPos != ZipConstants.CENOFF - ZipConstants.CENDSK)
{
throw new EndOfStreamException();
}
int offset = ReadLeInt();
byte[] buffer = new byte[Math.Max(nameLen, commentLen)];
baseStream.Read(buffer, 0, nameLen);
string name = ZipConstants.ConvertToString(buffer);
ZipEntry entry = new ZipEntry(name);
entry.CompressionMethod = (CompressionMethod)method;
entry.Crc = crc & 0xffffffffL;
entry.Size = size & 0xffffffffL;
entry.CompressedSize = csize & 0xffffffffL;
entry.DosTime = (uint)dostime;
if (extraLen > 0)
{
byte[] extra = new byte[extraLen];
baseStream.Read(extra, 0, extraLen);
entry.ExtraData = extra;
}
if (commentLen > 0)
{
baseStream.Read(buffer, 0, commentLen);
entry.Comment = ZipConstants.ConvertToString(buffer);
}
entry.ZipFileIndex = i;
entry.Offset = offset;
entries[i] = entry;
}
}
public ZipEntry GetNextEntry()
{
if (this.crc == null)
{
throw new InvalidOperationException("Closed.");
}
if (this.entry != null)
{
this.CloseEntry();
}
int num = base.inputBuffer.ReadLeInt();
switch (num)
{
case 0x2014b50:
case 0x6054b50:
case 0x5054b50:
case 0x6064b50:
this.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();
this.flags = base.inputBuffer.ReadLeShort();
this.method = base.inputBuffer.ReadLeShort();
uint num3 = (uint)base.inputBuffer.ReadLeInt();
int num4 = base.inputBuffer.ReadLeInt();
base.csize = base.inputBuffer.ReadLeInt();
this.size = base.inputBuffer.ReadLeInt();
int num5 = base.inputBuffer.ReadLeShort();
int num6 = base.inputBuffer.ReadLeShort();
bool flag = (this.flags & 1) == 1;
byte[] buffer = new byte[num5];
base.inputBuffer.ReadRawBuffer(buffer);
string name = ZipConstants.ConvertToString(buffer);
this.entry = new ZipEntry(name, versionRequiredToExtract);
this.entry.Flags = this.flags;
if ((this.method == 0) && ((!flag && (base.csize != this.size)) || (flag && ((base.csize - 12L) != this.size))))
{
throw new ZipException("Stored, but compressed != uncompressed");
}
if ((this.method != 0) && (this.method != 8))
{
throw new ZipException("Unknown compression method " + this.method);
}
this.entry.CompressionMethod = (CompressionMethod)this.method;
if ((this.flags & 8) == 0)
{
this.entry.Crc = num4 & ((long)0xffffffffL);
this.entry.Size = this.size & ((long)0xffffffffL);
this.entry.CompressedSize = base.csize & ((long)0xffffffffL);
}
else
{
if (num4 != 0)
{
this.entry.Crc = num4 & ((long)0xffffffffL);
}
if (this.size != 0L)
{
this.entry.Size = this.size & ((long)0xffffffffL);
}
if (base.csize != 0L)
{
this.entry.CompressedSize = base.csize & ((long)0xffffffffL);
}
}
this.entry.DosTime = num3;
if (num6 > 0)
{
byte[] buffer2 = new byte[num6];
base.inputBuffer.ReadRawBuffer(buffer2);
this.entry.ExtraData = buffer2;
}
this.internalReader = new ReaderDelegate(this.InitialRead);
return(this.entry);
}
/// <summary>
/// Read the central directory of a zip file and fill the entries
/// array. This is called exactly once by the constructors.
/// </summary>
/// <exception cref="System.IO.IOException">
/// An i/o error occurs.
/// </exception>
/// <exception cref="ICSharpCode.SharpZipLib.ZipException">
/// The central directory is malformed or cannot be found
/// </exception>
void ReadEntries()
{
/* Search for the End Of Central Directory. When a zip comment is
* present the directory may start earlier.
*
* TODO: The search is limited to 64K which is the maximum size of a trailing comment field to aid speed.
* This should be compatible with both SFX and ZIP files but has only been tested for Zip files
* Need to confirm this is valid in all cases.
*/
long pos = baseStream.Length - ZipConstants.ENDHDR;
long giveUpMarker = Math.Max(pos - 0x10000, 0);
do
{
if (pos < giveUpMarker)
{
throw new ZipException("central directory not found, probably not a zip file");
}
baseStream.Seek(pos--, SeekOrigin.Begin);
} while (ReadLeInt() != ZipConstants.ENDSIG);
long oldPos = baseStream.Position;
baseStream.Position += ZipConstants.ENDTOT - ZipConstants.ENDNRD;
if (baseStream.Position - oldPos != ZipConstants.ENDTOT - ZipConstants.ENDNRD)
{
throw new EndOfStreamException();
}
int count = ReadLeShort();
oldPos = baseStream.Position;
baseStream.Position += ZipConstants.ENDOFF - ZipConstants.ENDSIZ;
if (baseStream.Position - oldPos != ZipConstants.ENDOFF - ZipConstants.ENDSIZ)
{
throw new EndOfStreamException();
}
int centralOffset = ReadLeInt();
int commentSize = ReadLeShort();
byte[] zipComment = new byte[commentSize];
baseStream.Read(zipComment, 0, zipComment.Length);
comment = ZipConstants.ConvertToString(zipComment);
entries = new ZipEntry[count];
baseStream.Seek(centralOffset, SeekOrigin.Begin);
for (int i = 0; i < count; i++)
{
if (ReadLeInt() != ZipConstants.CENSIG)
{
throw new ZipException("Wrong Central Directory signature");
}
int versionMadeBy = ReadLeShort();
int versionToExtract = ReadLeShort();
int bitFlags = ReadLeShort();
int method = ReadLeShort();
int dostime = ReadLeInt();
int crc = ReadLeInt();
int csize = ReadLeInt();
int size = ReadLeInt();
int nameLen = ReadLeShort();
int extraLen = ReadLeShort();
int commentLen = ReadLeShort();
int diskStartNo = ReadLeShort(); // Not currently used
int internalAttributes = ReadLeShort(); // Not currently used
int externalAttributes = ReadLeInt();
int offset = ReadLeInt();
byte[] buffer = new byte[Math.Max(nameLen, commentLen)];
baseStream.Read(buffer, 0, nameLen);
string name = ZipConstants.ConvertToString(buffer, nameLen);
ZipEntry entry = new ZipEntry(name, versionToExtract, versionMadeBy);
entry.CompressionMethod = (CompressionMethod)method;
entry.Crc = crc & 0xffffffffL;
entry.Size = size & 0xffffffffL;
entry.CompressedSize = csize & 0xffffffffL;
entry.DosTime = (uint)dostime;
if (extraLen > 0)
{
byte[] extra = new byte[extraLen];
baseStream.Read(extra, 0, extraLen);
entry.ExtraData = extra;
}
if (commentLen > 0)
{
baseStream.Read(buffer, 0, commentLen);
entry.Comment = ZipConstants.ConvertToString(buffer, commentLen);
}
entry.ZipFileIndex = i;
entry.Offset = offset;
entry.ExternalFileAttributes = externalAttributes;
entries[i] = entry;
}
}
private void ReadEntries()
{
if (!this.baseStream.CanSeek)
{
throw new ZipException("ZipFile stream must be seekable");
}
long num = this.LocateBlockWithSignature(0x6054b50, this.baseStream.Length, 0x16, 0xffff);
if (num < 0L)
{
throw new ZipException("Cannot find central directory");
}
this.ReadLeShort();
this.ReadLeShort();
int num2 = this.ReadLeShort();
int num3 = this.ReadLeShort();
int num4 = this.ReadLeInt();
int num5 = this.ReadLeInt();
byte[] buffer = new byte[this.ReadLeShort()];
this.baseStream.Read(buffer, 0, buffer.Length);
this.comment = ZipConstants.ConvertToString(buffer);
this.entries = new ZipEntry[num3];
if (num5 < (num - (4 + num4)))
{
this.offsetOfFirstEntry = num - ((4 + num4) + num5);
if (this.offsetOfFirstEntry <= 0L)
{
throw new ZipException("Invalid SFX file");
}
}
this.baseStream.Seek(this.offsetOfFirstEntry + num5, SeekOrigin.Begin);
for (int i = 0; i < num2; i++)
{
if (this.ReadLeInt() != 0x2014b50)
{
throw new ZipException("Wrong Central Directory signature");
}
int madeByInfo = this.ReadLeShort();
int versionRequiredToExtract = this.ReadLeShort();
int num10 = this.ReadLeShort();
int num11 = this.ReadLeShort();
int num12 = this.ReadLeInt();
int num13 = this.ReadLeInt();
int num14 = this.ReadLeInt();
int num15 = this.ReadLeInt();
int num16 = this.ReadLeShort();
int count = this.ReadLeShort();
int num18 = this.ReadLeShort();
this.ReadLeShort();
this.ReadLeShort();
int num19 = this.ReadLeInt();
int num20 = this.ReadLeInt();
byte[] buffer2 = new byte[Math.Max(num16, num18)];
this.baseStream.Read(buffer2, 0, num16);
ZipEntry entry = new ZipEntry(ZipConstants.ConvertToString(buffer2, num16), versionRequiredToExtract, madeByInfo)
{
CompressionMethod = (CompressionMethod)num11,
Crc = num13 & ((long)0xffffffffL),
Size = num15 & ((long)0xffffffffL),
CompressedSize = num14 & ((long)0xffffffffL),
Flags = num10,
DosTime = (long)((ulong)num12)
};
if (count > 0)
{
byte[] buffer3 = new byte[count];
this.baseStream.Read(buffer3, 0, count);
entry.ExtraData = buffer3;
}
if (num18 > 0)
{
this.baseStream.Read(buffer2, 0, num18);
entry.Comment = ZipConstants.ConvertToString(buffer2, num18);
}
entry.ZipFileIndex = i;
entry.Offset = num20;
entry.ExternalFileAttributes = num19;
this.entries[i] = entry;
}
}
/// <summary>
/// Advances to the next entry in the archive
/// </summary>
/// <returns>
/// The next <see cref="ZipEntry">entry</see> in the archive or null if there are no more entries.
/// </returns>
/// <remarks>
/// If the previous entry is still open <see cref="CloseEntry">CloseEntry</see> is called.
/// </remarks>
/// <exception cref="InvalidOperationException">
/// Input stream is closed
/// </exception>
/// <exception cref="ZipException">
/// Password is not set, password is invalid, compression method is invalid,
/// version required to extract is not supported
/// </exception>
public ZipEntry GetNextEntry()
{
if (crc == null)
{
throw new InvalidOperationException("Closed.");
}
if (entry != null)
{
CloseEntry();
}
if (this.cryptbuffer != null)
{
if (inf.IsFinished == false && (entry.Flags & 8) != 0)
{
throw new ZipException("NextEntry location not known");
}
if (avail == 0 && inf.RemainingInput != 0)
{
avail = inf.RemainingInput - 16;
inf.Reset();
}
baseInputStream.Position -= this.len;
baseInputStream.Read(this.buf, 0, this.len);
}
if (avail <= 0)
{
FillBuf(ZipConstants.LOCHDR);
}
int header = ReadLeInt();
if (header == ZipConstants.CENSIG ||
header == ZipConstants.ENDSIG ||
header == ZipConstants.CENDIGITALSIG ||
header == ZipConstants.CENSIG64)
{
// No more individual entries exist
Close();
return(null);
}
// -jr- 07-Dec-2003 Ignore spanning temporary signatures if found
// SPANNINGSIG is same as descriptor signature and is untested as yet.
if (header == ZipConstants.SPANTEMPSIG || header == ZipConstants.SPANNINGSIG)
{
header = ReadLeInt();
}
if (header != ZipConstants.LOCSIG)
{
throw new ZipException("Wrong Local header signature: 0x" + String.Format("{0:X}", header));
}
short versionRequiredToExtract = (short)ReadLeShort();
flags = ReadLeShort();
method = ReadLeShort();
uint dostime = (uint)ReadLeInt();
int crc2 = ReadLeInt();
csize = ReadLeInt();
size = ReadLeInt();
int nameLen = ReadLeShort();
int extraLen = ReadLeShort();
bool isCrypted = (flags & 1) == 1;
byte[] buffer = new byte[nameLen];
ReadFully(buffer);
string name = ZipConstants.ConvertToString(buffer);
entry = new ZipEntry(name, versionRequiredToExtract);
entry.Flags = flags;
if (method == (int)CompressionMethod.Stored && (!isCrypted && csize != size || (isCrypted && csize - ZipConstants.CRYPTO_HEADER_SIZE != size)))
{
throw new ZipException("Stored, but compressed != uncompressed");
}
if (method != (int)CompressionMethod.Stored && method != (int)CompressionMethod.Deflated)
{
throw new ZipException("unknown compression method " + method);
}
entry.CompressionMethod = (CompressionMethod)method;
if ((flags & 8) == 0)
{
entry.Crc = crc2 & 0xFFFFFFFFL;
entry.Size = size & 0xFFFFFFFFL;
entry.CompressedSize = csize & 0xFFFFFFFFL;
BufferReadSize = 0;
}
else
{
if (isCrypted)
{
BufferReadSize = 1;
}
else
{
BufferReadSize = 0;
}
// This allows for GNU, WinZip and possibly other archives, the PKZIP spec says these are zero
// under these circumstances.
if (crc2 != 0)
{
entry.Crc = crc2 & 0xFFFFFFFFL;
}
if (size != 0)
{
entry.Size = size & 0xFFFFFFFFL;
}
if (csize != 0)
{
entry.CompressedSize = csize & 0xFFFFFFFFL;
}
}
entry.DosTime = dostime;
if (extraLen > 0)
{
byte[] extra = new byte[extraLen];
ReadFully(extra);
entry.ExtraData = extra;
}
// TODO How to handle this?
// This library cannot handle versions greater than 20
// Throwing an exception precludes getting at later possibly useable entries.
// Could also skip this entry entirely
// Letting it slip past here isnt so great as it wont work
if (versionRequiredToExtract > 20)
{
throw new ZipException("Libray cannot extract this entry version required (" + versionRequiredToExtract.ToString() + ")");
}
// test for encryption
if (isCrypted)
{
if (password == null)
{
throw new ZipException("No password set.");
}
InitializePassword(password);
cryptbuffer = new byte[ZipConstants.CRYPTO_HEADER_SIZE];
ReadFully(cryptbuffer);
DecryptBlock(cryptbuffer, 0, cryptbuffer.Length);
if ((flags & 8) == 0)
{
if (cryptbuffer[ZipConstants.CRYPTO_HEADER_SIZE - 1] != (byte)(crc2 >> 24))
{
throw new ZipException("Invalid password");
}
}
else
{
if (cryptbuffer[ZipConstants.CRYPTO_HEADER_SIZE - 1] != (byte)((dostime >> 8) & 0xff))
{
throw new ZipException("Invalid password");
}
}
if (csize >= ZipConstants.CRYPTO_HEADER_SIZE)
{
csize -= ZipConstants.CRYPTO_HEADER_SIZE;
}
}
else
{
cryptbuffer = null;
}
if (method == (int)CompressionMethod.Deflated && avail > 0)
{
System.Array.Copy(buf, len - (int)avail, buf, 0, (int)avail);
len = (int)avail;
avail = 0;
if (isCrypted)
{
DecryptBlock(buf, 0, Math.Min((int)csize, len));
}
inf.SetInput(buf, 0, len);
}
return(entry);
}
