| public IsCompressionMethodSupported ( ) : bool | ||
| return | bool | |
private void ExtractEntry(ZipEntry entry)
{
bool doExtraction = entry.IsCompressionMethodSupported();
string targetName = entry.Name;
if (doExtraction)
{
if (entry.IsFile)
{
targetName = extractNameTransform_.TransformFile(targetName);
}
else if (entry.IsDirectory)
{
targetName = extractNameTransform_.TransformDirectory(targetName);
}
doExtraction = !((targetName == null) || (targetName.Length == 0));
}
// TODO: Fire delegate/throw exception were compression method not supported, or name is invalid?
string dirName = null;
if (doExtraction)
{
if (entry.IsDirectory)
{
dirName = targetName;
}
else
{
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
}
}
if (doExtraction && !Directory.Exists(dirName))
{
if (!entry.IsDirectory)
{
try
{
Directory.CreateDirectory(dirName);
}
catch (Exception)
{
doExtraction = false;
continueRunning_ = false;
throw;
}
}
}
if (doExtraction && entry.IsFile)
{
ExtractFileEntry(entry, targetName);
}
}
private void ExtractEntry(ZipEntry entry)
{
bool flag = entry.IsCompressionMethodSupported();
string text = entry.Name;
if (flag)
{
if (entry.IsFile)
{
text = extractNameTransform_.TransformFile(text);
}
else if (entry.IsDirectory)
{
text = extractNameTransform_.TransformDirectory(text);
}
flag = text != null && text.get_Length() != 0;
}
string text2 = null;
if (flag)
{
text2 = ((!entry.IsDirectory) ? Path.GetDirectoryName(Path.GetFullPath(text)) : text);
}
if (flag && !Directory.Exists(text2) && (!entry.IsDirectory || CreateEmptyDirectories))
{
try
{
Directory.CreateDirectory(text2);
}
catch (global::System.Exception e)
{
flag = false;
if (events_ == null)
{
continueRunning_ = false;
throw;
}
if (entry.IsDirectory)
{
continueRunning_ = events_.OnDirectoryFailure(text, e);
}
else
{
continueRunning_ = events_.OnFileFailure(text, e);
}
}
}
if (flag && entry.IsFile)
{
ExtractFileEntry(entry, text);
}
}
private void ExtractEntry(ZipEntry entry)
{
bool doExtraction = NameIsValid(entry.Name) && entry.IsCompressionMethodSupported();
// TODO: Fire delegate were compression method not supported.
string dirName = null;
string targetName = null;
if (doExtraction)
{
string entryFileName;
if (Path.IsPathRooted(entry.Name))
{
string workName = Path.GetPathRoot(entry.Name);
workName = entry.Name.Substring(workName.Length);
entryFileName = Path.Combine(Path.GetDirectoryName(workName), Path.GetFileName(entry.Name));
}
else
{
entryFileName = entry.Name;
}
targetName = Path.Combine(targetDirectory_, entryFileName);
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
doExtraction = (entryFileName.Length > 0);
}
if (doExtraction && !Directory.Exists(dirName))
{
if (!entry.IsDirectory || CreateEmptyDirectories)
{
try
{
Directory.CreateDirectory(dirName);
}
catch
{
doExtraction = false;
}
}
}
if (doExtraction && entry.IsFile)
{
ExtractFileEntry(entry, targetName);
}
}
private void ExtractEntry(ZipEntry entry)
{
bool flag = entry.IsCompressionMethodSupported();
string name = entry.Name;
if (flag)
{
if (entry.IsFile)
{
name = this.extractNameTransform_.TransformFile(name);
}
else if (entry.IsDirectory)
{
name = this.extractNameTransform_.TransformDirectory(name);
}
flag = (name != null) && (name.Length != 0);
}
string path = null;
if (flag)
{
path = !entry.IsDirectory ? Path.GetDirectoryName(Path.GetFullPath(name)) : name;
}
if ((flag && !Directory.Exists(path)) && (!entry.IsDirectory || this.CreateEmptyDirectories))
{
try
{
Directory.CreateDirectory(path);
}
catch (Exception exception)
{
flag = false;
if (this.events_ == null)
{
this.continueRunning_ = false;
throw;
}
this.continueRunning_ = !entry.IsDirectory ? this.events_.OnFileFailure(name, exception) : this.events_.OnDirectoryFailure(name, exception);
}
}
if (flag && entry.IsFile)
{
this.ExtractFileEntry(entry, name);
}
}
void ExtractEntry(ZipEntry entry)
{
bool doExtraction = false;
string nameText = entry.Name;
if (entry.IsFile)
{
// TODO: Translate invalid names allowing extraction still.
doExtraction = NameIsValid(nameText) && entry.IsCompressionMethodSupported();
}
else if (entry.IsDirectory)
{
doExtraction = NameIsValid(nameText);
}
// TODO: Fire delegate were compression method not supported, or name is invalid?
string dirName = null;
string targetName = null;
if (doExtraction)
{
// Handle invalid entry names by chopping of path root.
if (Path.IsPathRooted(nameText))
{
string workName = Path.GetPathRoot(nameText);
nameText = nameText.Substring(workName.Length);
}
if (nameText.Length > 0)
{
targetName = Path.Combine(targetDirectory_, nameText);
if (entry.IsDirectory)
{
dirName = targetName;
}
else
{
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
}
}
else
{
doExtraction = false;
}
}
if (doExtraction && !Directory.Exists(dirName))
{
if (!entry.IsDirectory || CreateEmptyDirectories)
{
try {
Directory.CreateDirectory(dirName);
}
catch (Exception ex) {
doExtraction = false;
if (events_ != null)
{
if (entry.IsDirectory)
{
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
}
else
{
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
}
else
{
continueRunning_ = false;
}
}
}
}
if (doExtraction && entry.IsFile)
{
ExtractFileEntry(entry, targetName);
}
}
private void ExtractZipEntry(ZipFile zipFile, ZipEntry entry)
{
if (!entry.IsCompressionMethodSupported() || string.IsNullOrEmpty(entry.Name)) return;
string tPath = Path.Combine(_tempPath, entry.Name);
string path = entry.IsDirectory ? tPath : Path.GetDirectoryName(Path.GetFullPath(tPath));
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
if (!entry.IsFile) return;
// try
// {
using (FileStream stream = File.Create(tPath))
{
if (buffer == null)
{
buffer = new byte[0x1000];
}
using(Stream inputStream = zipFile.GetInputStream(entry))
{
int count;
while ((count = inputStream.Read(buffer, 0, buffer.Length)) > 0)
{
stream.Write(buffer, 0, count);
}
}
stream.Flush();
}
// }
// catch
// {
// throw;
// }
}
/// <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();
}
int header = inputBuffer.ReadLeInt();
if (header == ZipConstants.CentralHeaderSignature ||
header == ZipConstants.EndOfCentralDirectorySignature ||
header == ZipConstants.CentralHeaderDigitalSignature ||
header == ZipConstants.ArchiveExtraDataSignature ||
header == ZipConstants.Zip64CentralFileHeaderSignature)
{
// No more individual entries exist
#if NET45
Close();
#endif
#if NETSTANDARD1_3
Dispose();
#endif
return(null);
}
// -jr- 07-Dec-2003 Ignore spanning temporary signatures if found
// Spanning signature is same as descriptor signature and is untested as yet.
if ((header == ZipConstants.SpanningTempSignature) || (header == ZipConstants.SpanningSignature))
{
header = inputBuffer.ReadLeInt();
}
if (header != ZipConstants.LocalHeaderSignature)
{
throw new ZipException("Wrong Local header signature: 0x" + String.Format("{0:X}", header));
}
var versionRequiredToExtract = (short)inputBuffer.ReadLeShort();
flags = inputBuffer.ReadLeShort();
method = inputBuffer.ReadLeShort();
var dostime = (uint)inputBuffer.ReadLeInt();
int crc2 = inputBuffer.ReadLeInt();
csize = inputBuffer.ReadLeInt();
size = inputBuffer.ReadLeInt();
int nameLen = inputBuffer.ReadLeShort();
int extraLen = inputBuffer.ReadLeShort();
bool isCrypted = (flags & 1) == 1;
byte[] buffer = new byte[nameLen];
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 = crc2 & 0xFFFFFFFFL;
entry.Size = size & 0xFFFFFFFFL;
entry.CompressedSize = csize & 0xFFFFFFFFL;
entry.CryptoCheckValue = (byte)((crc2 >> 24) & 0xff);
}
else
{
// This allows for GNU, WinZip and possibly other archives, the PKZIP spec
// says these values 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.CryptoCheckValue = (byte)((dostime >> 8) & 0xff);
}
entry.DosTime = dostime;
// If local header requires Zip64 is true then the extended header should contain
// both values.
// Handle extra data if present. This can set/alter some fields of the entry.
if (extraLen > 0)
{
byte[] extra = new byte[extraLen];
inputBuffer.ReadRawBuffer(extra);
entry.ExtraData = extra;
}
entry.ProcessExtraData(true);
if (entry.CompressedSize >= 0)
{
csize = entry.CompressedSize;
}
if (entry.Size >= 0)
{
size = entry.Size;
}
if (method == (int)CompressionMethod.Stored && (!isCrypted && csize != size || (isCrypted && csize - ZipConstants.CryptoHeaderSize != size)))
{
throw new ZipException("Stored, but compressed != uncompressed");
}
// Determine how to handle reading of data if this is attempted.
if (entry.IsCompressionMethodSupported())
{
internalReader = new ReadDataHandler(InitialRead);
}
else
{
internalReader = new ReadDataHandler(ReadingNotSupported);
}
return(entry);
}
private void ExtractEntry(ZipEntry entry)
{
bool flag = false;
string name = entry.Name;
if (entry.IsFile)
{
flag = NameIsValid(name) && entry.IsCompressionMethodSupported();
}
else if (entry.IsDirectory)
{
flag = NameIsValid(name);
}
string path = null;
string str3 = null;
if (flag)
{
if (Path.IsPathRooted(name))
{
string pathRoot = Path.GetPathRoot(name);
name = name.Substring(pathRoot.Length);
}
if (name.Length > 0)
{
str3 = Path.Combine(this.targetDirectory_, name);
if (entry.IsDirectory)
{
path = str3;
}
else
{
path = Path.GetDirectoryName(Path.GetFullPath(str3));
}
}
else
{
flag = false;
}
}
if ((flag && !Directory.Exists(path)) && (!entry.IsDirectory || this.CreateEmptyDirectories))
{
try
{
Directory.CreateDirectory(path);
}
catch (Exception exception)
{
flag = false;
if (this.events_ != null)
{
if (entry.IsDirectory)
{
this.continueRunning_ = this.events_.OnDirectoryFailure(str3, exception);
}
else
{
this.continueRunning_ = this.events_.OnFileFailure(str3, exception);
}
}
else
{
this.continueRunning_ = false;
}
}
}
if (flag && entry.IsFile)
{
this.ExtractFileEntry(entry, str3);
}
}
private void ExtractEntry(ZipEntry entry)
{
bool flag = entry.IsCompressionMethodSupported();
string text = entry.Name;
if (flag)
{
if (entry.IsFile)
{
text = this.extractNameTransform_.TransformFile(text);
}
else if (entry.IsDirectory)
{
text = this.extractNameTransform_.TransformDirectory(text);
}
flag = (text != null && text.Length != 0);
}
string path = null;
if (flag)
{
if (entry.IsDirectory)
{
path = text;
}
else
{
path = Path.GetDirectoryName(Path.GetFullPath(text));
}
}
if (flag && !Directory.Exists(path))
{
if (entry.IsDirectory)
{
if (!this.CreateEmptyDirectories)
{
goto IL_D9;
}
}
try
{
Directory.CreateDirectory(path);
}
catch (Exception e)
{
flag = false;
if (this.events_ == null)
{
this.continueRunning_ = false;
throw;
}
if (entry.IsDirectory)
{
this.continueRunning_ = this.events_.OnDirectoryFailure(text, e);
}
else
{
this.continueRunning_ = this.events_.OnFileFailure(text, e);
}
}
}
IL_D9:
if (flag && entry.IsFile)
{
this.ExtractFileEntry(entry, text);
}
}
private long TestLocalHeader(ZipEntry entry, HeaderTest tests)
{
lock (this.baseStream_)
{
bool flag = (tests & HeaderTest.Header) != 0;
bool flag2 = (tests & HeaderTest.Extract) != 0;
this.baseStream_.Seek(this.offsetOfFirstEntry + entry.Offset, SeekOrigin.Begin);
if (this.ReadLEUint() != 0x4034b50)
{
throw new ZipException(string.Format("Wrong local header signature @{0:X}", this.offsetOfFirstEntry + entry.Offset));
}
short num = (short) this.ReadLEUshort();
short flags = (short) this.ReadLEUshort();
short num3 = (short) this.ReadLEUshort();
short num4 = (short) this.ReadLEUshort();
short num5 = (short) this.ReadLEUshort();
uint num6 = this.ReadLEUint();
long num7 = this.ReadLEUint();
long num8 = this.ReadLEUint();
int num9 = this.ReadLEUshort();
int num10 = this.ReadLEUshort();
byte[] buffer = new byte[num9];
StreamUtils.ReadFully(this.baseStream_, buffer);
byte[] buffer2 = new byte[num10];
StreamUtils.ReadFully(this.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 (((this.offsetOfFirstEntry + entry.Offset) + 30L) + num11);
}
}
public ZipEntry GetNextEntry()
{
if (crc == null)
{
throw new InvalidOperationException("Closed.");
}
if (entry != null)
{
CloseEntry();
}
int header = inputBuffer.ReadLeInt();
if (header == ZipConstants.CentralHeaderSignature ||
header == ZipConstants.EndOfCentralDirectorySignature ||
header == ZipConstants.CentralHeaderDigitalSignature ||
header == ZipConstants.ArchiveExtraDataSignature ||
header == ZipConstants.Zip64CentralFileHeaderSignature)
{
Close();
return(null);
}
if ((header == ZipConstants.SpanningTempSignature) || (header == ZipConstants.SpanningSignature))
{
header = inputBuffer.ReadLeInt();
}
if (header != ZipConstants.LocalHeaderSignature)
{
throw new ZipException("Wrong Local header signature: 0x" + String.Format("{0:X}", header));
}
short versionRequiredToExtract = (short)inputBuffer.ReadLeShort();
flags = inputBuffer.ReadLeShort();
method = inputBuffer.ReadLeShort();
uint dostime = (uint)inputBuffer.ReadLeInt();
int crc2 = inputBuffer.ReadLeInt();
csize = inputBuffer.ReadLeInt();
size = inputBuffer.ReadLeInt();
int nameLen = inputBuffer.ReadLeShort();
int extraLen = inputBuffer.ReadLeShort();
bool isCrypted = (flags & 1) == 1;
byte[] buffer = new byte[nameLen];
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 = crc2 & 0xFFFFFFFFL;
entry.Size = size & 0xFFFFFFFFL;
entry.CompressedSize = csize & 0xFFFFFFFFL;
entry.CryptoCheckValue = (byte)((crc2 >> 24) & 0xff);
}
else
{
if (crc2 != 0)
{
entry.Crc = crc2 & 0xFFFFFFFFL;
}
if (size != 0)
{
entry.Size = size & 0xFFFFFFFFL;
}
if (csize != 0)
{
entry.CompressedSize = csize & 0xFFFFFFFFL;
}
entry.CryptoCheckValue = (byte)((dostime >> 8) & 0xff);
}
entry.DosTime = dostime;
if (extraLen > 0)
{
byte[] extra = new byte[extraLen];
inputBuffer.ReadRawBuffer(extra);
entry.ExtraData = extra;
}
entry.ProcessExtraData(true);
if (entry.CompressedSize >= 0)
{
csize = entry.CompressedSize;
}
if (entry.Size >= 0)
{
size = entry.Size;
}
if (method == (int)CompressionMethod.Stored && (!isCrypted && csize != size || (isCrypted && csize - ZipConstants.CryptoHeaderSize != size)))
{
throw new ZipException("Stored, but compressed != uncompressed");
}
if (entry.IsCompressionMethodSupported())
{
internalReader = new ReadDataHandler(InitialRead);
}
else
{
internalReader = new ReadDataHandler(ReadingNotSupported);
}
return(entry);
}
private void ExtractZipEntry(ZipFile zipFile, ZipEntry entry)
{
if (!entry.IsCompressionMethodSupported() || string.IsNullOrEmpty(entry.Name) || !entry.IsFile) return;
using (MemoryStream stream = new MemoryStream())
{
if (_Buffer == null)
{
_Buffer = new byte[0x1000];
}
Stream inputStream = zipFile.GetInputStream(entry);
int count;
while ((count = inputStream.Read(_Buffer, 0, _Buffer.Length)) > 0)
{
stream.Write(_Buffer, 0, count);
}
stream.Flush();
stream.Close();
fakeFileSystem.Add(entry.Name, stream);
}
}
private void ExtractEntry(ZipFile zipFile, ZipEntry entry, string entryName, INameTransform extractNameTransform)
{
if (!entry.IsCompressionMethodSupported())
return;
if (entry.IsFile)
entryName = extractNameTransform.TransformFile(entryName);
else if (entry.IsDirectory)
entryName = extractNameTransform.TransformDirectory(entryName);
if (!String.IsNullOrEmpty(entryName))
{
Directory.CreateDirectory(
!entry.IsDirectory ? Path.GetDirectoryName(Path.GetFullPath(entryName)) : entryName
);
if (entry.IsFile)
ExtractFileEntry(zipFile, entry, entryName);
}
}
private void ExtractZipEntry(ZipFile zipFile, ZipEntry entry)
{
if (!entry.IsCompressionMethodSupported() || string.IsNullOrEmpty(entry.Name)) return;
string tPath = Path.Combine(_tempPath, entry.Name);
string path = entry.IsDirectory ? tPath : Path.GetDirectoryName(Path.GetFullPath(tPath));
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
if (!entry.IsFile) return;
try
{
using (FileStream stream = File.Create(tPath))
{
if (buffer == null)
{
buffer = new byte[0x1000];
}
Stream inputStream = zipFile.GetInputStream(entry);
int count;
while ((count = inputStream.Read(buffer, 0, buffer.Length)) > 0)
{
//if (entry.ZipFileIndex == 86)
//{
// StringBuilder sb = new StringBuilder();
// for (int i = 0; i < buffer.Length; i++)
// {
// sb.Append(buffer[i]);
// }
// System.Diagnostics.Debug.WriteLine(buffer.Length.ToString() + " " + sb.ToString());
//}
stream.Write(buffer, 0, count);
}
stream.Flush();
}
}
catch
{
throw;
}
}
private void ExtractEntry(ZipEntry entry)
{
bool flag = entry.IsCompressionMethodSupported();
string name = entry.Name;
if (flag)
{
if (entry.IsFile)
{
name = this.extractNameTransform_.TransformFile(name);
}
else if (entry.IsDirectory)
{
name = this.extractNameTransform_.TransformDirectory(name);
}
flag = (name != null) && (name.Length != 0);
}
string path = null;
if (flag)
{
if (entry.IsDirectory)
{
path = name;
}
else
{
path = Path.GetDirectoryName(Path.GetFullPath(name));
}
}
if ((flag && !Directory.Exists(path)) && (!entry.IsDirectory || this.CreateEmptyDirectories))
{
try
{
Directory.CreateDirectory(path);
}
catch (Exception exception)
{
flag = false;
if (this.events_ != null)
{
if (entry.IsDirectory)
{
this.continueRunning_ = this.events_.OnDirectoryFailure(name, exception);
}
else
{
this.continueRunning_ = this.events_.OnFileFailure(name, exception);
}
}
else
{
this.continueRunning_ = false;
throw;
}
}
}
if (flag && entry.IsFile)
{
this.ExtractFileEntry(entry, name);
}
}
/// <summary>
/// Test a local header against that provided from the central directory
/// </summary>
/// <param name="entry">
/// The entry to test against
/// </param>
/// <param name="tests">The type of <see cref="HeaderTest">tests</see> to carry out.</param>
/// <returns>The offset of the entries data in the file</returns>
long TestLocalHeader(ZipEntry entry, HeaderTest tests)
{
lock(baseStream_)
{
bool testHeader = (tests & HeaderTest.Header) != 0;
bool testData = (tests & HeaderTest.Extract) != 0;
baseStream_.Seek(offsetOfFirstEntry + entry.Offset, SeekOrigin.Begin);
if ((int)ReadLEUint() != ZipConstants.LocalHeaderSignature) {
throw new ZipException(string.Format("Wrong local header signature @{0:X}", offsetOfFirstEntry + entry.Offset));
}
short extractVersion = ( short )ReadLEUshort();
short localFlags = ( short )ReadLEUshort();
short compressionMethod = ( short )ReadLEUshort();
short fileTime = ( short )ReadLEUshort();
short fileDate = ( short )ReadLEUshort();
uint crcValue = ReadLEUint();
long size = ReadLEUint();
long compressedSize = ReadLEUint();
int storedNameLength = ReadLEUshort();
int extraDataLength = ReadLEUshort();
if ( testData ) {
if ( entry.IsFile ) {
if ( !entry.IsCompressionMethodSupported() ) {
throw new ZipException("Compression method not supported");
}
if ( (extractVersion > ZipConstants.VersionMadeBy)
|| ((extractVersion > 20) && (extractVersion < ZipConstants.VersionZip64)) ) {
throw new ZipException(string.Format("Version required to extract this entry not supported ({0})", extractVersion));
}
if ( (localFlags & ( int )(GeneralBitFlags.Patched | GeneralBitFlags.StrongEncryption | GeneralBitFlags.EnhancedCompress | GeneralBitFlags.HeaderMasked)) != 0 ) {
throw new ZipException("The library does not support the zip version required to extract this entry");
}
}
}
if ( testHeader ) {
if ((extractVersion <= 63) && // Ignore later versions as we dont know about them..
(extractVersion != 10) &&
(extractVersion != 11) &&
(extractVersion != 20) &&
(extractVersion != 21) &&
(extractVersion != 25) &&
(extractVersion != 27) &&
(extractVersion != 45) &&
(extractVersion != 46) &&
(extractVersion != 50) &&
(extractVersion != 51) &&
(extractVersion != 52) &&
(extractVersion != 61) &&
(extractVersion != 62) &&
(extractVersion != 63)
) {
throw new ZipException(string.Format("Version required to extract this entry is invalid ({0})", extractVersion));
}
// Local entry flags dont have reserved bit set on.
if ( (localFlags & ( int )(GeneralBitFlags.ReservedPKware4 | GeneralBitFlags.ReservedPkware14 | GeneralBitFlags.ReservedPkware15)) != 0 ) {
throw new ZipException("Reserved bit flags cannot be set.");
}
// Encryption requires extract version >= 20
if ( ((localFlags & ( int )GeneralBitFlags.Encrypted) != 0) && (extractVersion < 20) ) {
throw new ZipException(string.Format("Version required to extract this entry is too low for encryption ({0})", extractVersion));
}
// Strong encryption requires encryption flag to be set and extract version >= 50.
if ( (localFlags & (int)GeneralBitFlags.StrongEncryption) != 0 ) {
if ( (localFlags & (int)GeneralBitFlags.Encrypted) == 0 ) {
throw new ZipException("Strong encryption flag set but encryption flag is not set");
}
if ( extractVersion < 50 ) {
throw new ZipException(string.Format("Version required to extract this entry is too low for encryption ({0})", extractVersion));
}
}
// Patched entries require extract version >= 27
if ( ((localFlags & ( int )GeneralBitFlags.Patched) != 0) && (extractVersion < 27) ) {
throw new ZipException(string.Format("Patched data requires higher version than ({0})", extractVersion));
}
// Central header flags match local entry flags.
if ( localFlags != entry.Flags ) {
throw new ZipException("Central header/local header flags mismatch");
}
// Central header compression method matches local entry
if ( entry.CompressionMethod != ( CompressionMethod )compressionMethod ) {
throw new ZipException("Central header/local header compression method mismatch");
}
// Strong encryption and extract version match
if ( (localFlags & ( int )GeneralBitFlags.StrongEncryption) != 0 ) {
if ( extractVersion < 62 ) {
throw new ZipException("Strong encryption flag set but version not high enough");
}
}
if ( (localFlags & ( int )GeneralBitFlags.HeaderMasked) != 0 ) {
if ( (fileTime != 0) || (fileDate != 0) ) {
throw new ZipException("Header masked set but date/time values non-zero");
}
}
if ( (localFlags & ( int )GeneralBitFlags.Descriptor) == 0 ) {
if ( crcValue != (uint)entry.Crc ) {
throw new ZipException("Central header/local header crc mismatch");
}
}
// Crc valid for empty entry.
if ( (size == 0) && (compressedSize == 0) ) {
if ( crcValue != 0 ) {
throw new ZipException("Invalid CRC for empty entry");
}
}
// TODO: make test more correct... can't compare lengths as was done originally as this can fail for MBCS strings
// Assuming a code page at this point is not valid? Best is to store the name length in the ZipEntry probably
if ( entry.Name.Length > storedNameLength ) {
throw new ZipException("File name length mismatch");
}
byte[] nameData = new byte[storedNameLength];
StreamUtils.ReadFully(baseStream_, nameData);
string localName = ZipConstants.ConvertToStringExt(localFlags, nameData);
// Central directory and local entry name match
if ( localName != entry.Name ) {
throw new ZipException("Central header and local header file name mismatch");
}
// Directories have zero size.
if ( entry.IsDirectory ) {
if ( (compressedSize != 0) || (size != 0) ) {
throw new ZipException("Directory cannot have size");
}
}
if ( !ZipNameTransform.IsValidName(localName, true) ) {
throw new ZipException("Name is invalid");
}
byte[] data = new byte[extraDataLength];
StreamUtils.ReadFully(baseStream_, data);
ZipExtraData ed = new ZipExtraData(data);
// Extra data / zip64 checks
if ( ed.Find(1) ) {
// Zip64 extra data but 'extract version' is too low
if ( extractVersion < ZipConstants.VersionZip64 ) {
throw new ZipException(
string.Format("Extra data contains Zip64 information but version {0}.{1} is not high enough",
extractVersion / 10, extractVersion % 10));
}
// Zip64 extra data but size fields dont indicate its required.
if ( (( uint )size != uint.MaxValue) && (( uint )compressedSize != uint.MaxValue) ) {
throw new ZipException("Entry sizes not correct for Zip64");
}
size = ed.ReadLong();
compressedSize = ed.ReadLong();
}
else {
// No zip64 extra data but entry requires it.
if ( (extractVersion >= ZipConstants.VersionZip64) &&
((( uint )size == uint.MaxValue) || (( uint )compressedSize == uint.MaxValue)) ) {
throw new ZipException("Required Zip64 extended information missing");
}
}
}
int extraLength = storedNameLength + extraDataLength;
return offsetOfFirstEntry + entry.Offset + ZipConstants.LocalHeaderBaseSize + extraLength;
}
}
long TestLocalHeader(ZipEntry entry, HeaderTest tests)
{
lock(baseStream_)
{
bool testHeader = (tests & HeaderTest.Header) != 0;
bool testData = (tests & HeaderTest.Extract) != 0;
baseStream_.Seek(offsetOfFirstEntry + entry.Offset, SeekOrigin.Begin);
if ((int)ReadLEUint() != ZipConstants.LocalHeaderSignature) {
throw new ZipException(string.Format("Wrong local header signature @{0:X}", offsetOfFirstEntry + entry.Offset));
}
short extractVersion = ( short )ReadLEUshort();
short localFlags = ( short )ReadLEUshort();
short compressionMethod = ( short )ReadLEUshort();
short fileTime = ( short )ReadLEUshort();
short fileDate = ( short )ReadLEUshort();
uint crcValue = ReadLEUint();
long compressedSize = ReadLEUint();
long size = ReadLEUint();
int storedNameLength = ReadLEUshort();
int extraDataLength = ReadLEUshort();
byte[] nameData = new byte[storedNameLength];
StreamUtils.ReadFully(baseStream_, nameData);
byte[] extraData = new byte[extraDataLength];
StreamUtils.ReadFully(baseStream_, extraData);
ZipExtraData localExtraData = new ZipExtraData(extraData);
if (localExtraData.Find(1))
{
if (extractVersion < ZipConstants.VersionZip64)
{
throw new ZipException(
string.Format("Extra data contains Zip64 information but version {0}.{1} is not high enough",
extractVersion / 10, extractVersion % 10));
}
if (((uint)size != uint.MaxValue) && ((uint)compressedSize != uint.MaxValue))
{
throw new ZipException("Entry sizes not correct for Zip64");
}
size = localExtraData.ReadLong();
compressedSize = localExtraData.ReadLong();
if ((localFlags & (int)GeneralBitFlags.Descriptor) != 0)
{
if ( (size != -1) && (size != entry.Size)) {
throw new ZipException("Size invalid for descriptor");
}
if ((compressedSize != -1) && (compressedSize != entry.CompressedSize)) {
throw new ZipException("Compressed size invalid for descriptor");
}
}
}
else
{
if ((extractVersion >= ZipConstants.VersionZip64) &&
(((uint)size == uint.MaxValue) || ((uint)compressedSize == uint.MaxValue)))
{
throw new ZipException("Required Zip64 extended information missing");
}
}
if ( testData ) {
if ( entry.IsFile ) {
if ( !entry.IsCompressionMethodSupported() ) {
throw new ZipException("Compression method not supported");
}
if ( (extractVersion > ZipConstants.VersionMadeBy)
|| ((extractVersion > 20) && (extractVersion < ZipConstants.VersionZip64)) ) {
throw new ZipException(string.Format("Version required to extract this entry not supported ({0})", extractVersion));
}
if ( (localFlags & ( int )(GeneralBitFlags.Patched | GeneralBitFlags.StrongEncryption | GeneralBitFlags.EnhancedCompress | GeneralBitFlags.HeaderMasked)) != 0 ) {
throw new ZipException("The library does not support the zip version required to extract this entry");
}
}
}
if (testHeader)
{
if ((extractVersion <= 63) &&
(extractVersion != 10) &&
(extractVersion != 11) &&
(extractVersion != 20) &&
(extractVersion != 21) &&
(extractVersion != 25) &&
(extractVersion != 27) &&
(extractVersion != 45) &&
(extractVersion != 46) &&
(extractVersion != 50) &&
(extractVersion != 51) &&
(extractVersion != 52) &&
(extractVersion != 61) &&
(extractVersion != 62) &&
(extractVersion != 63)
)
{
throw new ZipException(string.Format("Version required to extract this entry is invalid ({0})", extractVersion));
}
if ((localFlags & (int)(GeneralBitFlags.ReservedPKware4 | GeneralBitFlags.ReservedPkware14 | GeneralBitFlags.ReservedPkware15)) != 0)
{
throw new ZipException("Reserved bit flags cannot be set.");
}
if (((localFlags & (int)GeneralBitFlags.Encrypted) != 0) && (extractVersion < 20))
{
throw new ZipException(string.Format("Version required to extract this entry is too low for encryption ({0})", extractVersion));
}
if ((localFlags & (int)GeneralBitFlags.StrongEncryption) != 0)
{
if ((localFlags & (int)GeneralBitFlags.Encrypted) == 0)
{
throw new ZipException("Strong encryption flag set but encryption flag is not set");
}
if (extractVersion < 50)
{
throw new ZipException(string.Format("Version required to extract this entry is too low for encryption ({0})", extractVersion));
}
}
if (((localFlags & (int)GeneralBitFlags.Patched) != 0) && (extractVersion < 27))
{
throw new ZipException(string.Format("Patched data requires higher version than ({0})", extractVersion));
}
if (localFlags != entry.Flags)
{
throw new ZipException("Central header/local header flags mismatch");
}
if (entry.CompressionMethod != (CompressionMethod)compressionMethod)
{
throw new ZipException("Central header/local header compression method mismatch");
}
if (entry.Version != extractVersion)
{
throw new ZipException("Extract version mismatch");
}
if ((localFlags & (int)GeneralBitFlags.StrongEncryption) != 0)
{
if (extractVersion < 62)
{
throw new ZipException("Strong encryption flag set but version not high enough");
}
}
if ((localFlags & (int)GeneralBitFlags.HeaderMasked) != 0)
{
if ((fileTime != 0) || (fileDate != 0))
{
throw new ZipException("Header masked set but date/time values non-zero");
}
}
if ((localFlags & (int)GeneralBitFlags.Descriptor) == 0)
{
if (crcValue != (uint)entry.Crc)
{
throw new ZipException("Central header/local header crc mismatch");
}
}
if ((size == 0) && (compressedSize == 0))
{
if (crcValue != 0)
{
throw new ZipException("Invalid CRC for empty entry");
}
}
if (entry.Name.Length > storedNameLength)
{
throw new ZipException("File name length mismatch");
}
string localName = ZipConstants.ConvertToStringExt(localFlags, nameData);
if (localName != entry.Name)
{
throw new ZipException("Central header and local header file name mismatch");
}
if (entry.IsDirectory)
{
if (size > 0)
{
throw new ZipException("Directory cannot have size");
}
if (entry.IsCrypted)
{
if (compressedSize > ZipConstants.CryptoHeaderSize + 2)
{
throw new ZipException("Directory compressed size invalid");
}
}
else if (compressedSize > 2)
{
throw new ZipException("Directory compressed size invalid");
}
}
if (!ZipNameTransform.IsValidName(localName, true))
{
throw new ZipException("Name is invalid");
}
}
if (((localFlags & (int)GeneralBitFlags.Descriptor) == 0) ||
((size > 0) || (compressedSize > 0))) {
if (size != entry.Size) {
throw new ZipException(
string.Format("Size mismatch between central header({0}) and local header({1})",
entry.Size, size));
}
if (compressedSize != entry.CompressedSize) {
throw new ZipException(
string.Format("Compressed size mismatch between central header({0}) and local header({1})",
entry.CompressedSize, compressedSize));
}
}
int extraLength = storedNameLength + extraDataLength;
return offsetOfFirstEntry + entry.Offset + ZipConstants.LocalHeaderBaseSize + extraLength;
}
}
public ZipEntry GetNextEntry()
{
if (crc == null) {
throw new InvalidOperationException("Closed.");
}
if (entry != null) {
CloseEntry();
}
int header = inputBuffer.ReadLeInt();
if (header == ZipConstants.CentralHeaderSignature ||
header == ZipConstants.EndOfCentralDirectorySignature ||
header == ZipConstants.CentralHeaderDigitalSignature ||
header == ZipConstants.ArchiveExtraDataSignature ||
header == ZipConstants.Zip64CentralFileHeaderSignature) {
Close();
return null;
}
if ( (header == ZipConstants.SpanningTempSignature) || (header == ZipConstants.SpanningSignature) ) {
header = inputBuffer.ReadLeInt();
}
if (header != ZipConstants.LocalHeaderSignature) {
throw new ZipException("Wrong Local header signature: 0x" + String.Format("{0:X}", header));
}
short versionRequiredToExtract = (short)inputBuffer.ReadLeShort();
flags = inputBuffer.ReadLeShort();
method = inputBuffer.ReadLeShort();
uint dostime = (uint)inputBuffer.ReadLeInt();
int crc2 = inputBuffer.ReadLeInt();
csize = inputBuffer.ReadLeInt();
size = inputBuffer.ReadLeInt();
int nameLen = inputBuffer.ReadLeShort();
int extraLen = inputBuffer.ReadLeShort();
bool isCrypted = (flags & 1) == 1;
byte[] buffer = new byte[nameLen];
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 = crc2 & 0xFFFFFFFFL;
entry.Size = size & 0xFFFFFFFFL;
entry.CompressedSize = csize & 0xFFFFFFFFL;
entry.CryptoCheckValue = (byte)((crc2 >> 24) & 0xff);
} else {
if (crc2 != 0) {
entry.Crc = crc2 & 0xFFFFFFFFL;
}
if (size != 0) {
entry.Size = size & 0xFFFFFFFFL;
}
if (csize != 0) {
entry.CompressedSize = csize & 0xFFFFFFFFL;
}
entry.CryptoCheckValue = (byte)((dostime >> 8) & 0xff);
}
entry.DosTime = dostime;
if (extraLen > 0) {
byte[] extra = new byte[extraLen];
inputBuffer.ReadRawBuffer(extra);
entry.ExtraData = extra;
}
entry.ProcessExtraData(true);
if ( entry.CompressedSize >= 0 ) {
csize = entry.CompressedSize;
}
if ( entry.Size >= 0 ) {
size = entry.Size;
}
if (method == (int)CompressionMethod.Stored && (!isCrypted && csize != size || (isCrypted && csize - ZipConstants.CryptoHeaderSize != size))) {
throw new ZipException("Stored, but compressed != uncompressed");
}
if (entry.IsCompressionMethodSupported()) {
internalReader = new ReadDataHandler(InitialRead);
} else {
internalReader = new ReadDataHandler(ReadingNotSupported);
}
return entry;
}
void ExtractEntry(ZipEntry entry)
{
bool doExtraction = entry.IsCompressionMethodSupported();
string targetName = entry.Name;
if (doExtraction)
{
if (entry.IsFile)
{
targetName = extractNameTransform_.TransformFile(targetName);
}
else if (entry.IsDirectory)
{
targetName = extractNameTransform_.TransformDirectory(targetName);
}
doExtraction = !string.IsNullOrEmpty(targetName);
}
// TODO: Fire delegate/throw exception were compression method not supported, or name is invalid?
string dirName = null;
if (doExtraction)
{
if (entry.IsDirectory)
{
dirName = targetName;
}
else
{
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
}
}
if (doExtraction && !Directory.Exists(dirName))
{
if (!entry.IsDirectory || CreateEmptyDirectories)
{
try {
Directory.CreateDirectory(dirName);
}
catch (Exception ex) {
doExtraction = false;
if (events_ != null)
{
if (entry.IsDirectory)
{
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
}
else
{
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
}
else
{
continueRunning_ = false;
throw;
}
}
}
}
if (doExtraction && entry.IsFile)
{
ExtractFileEntry(entry, targetName);
}
}
void ExtractFileEntry(ZipEntry entry, string targetName)
{
bool proceed = true;
if ( overwrite_ != Overwrite.Always ) {
#if !PCL
if ( File.Exists(targetName) ) {
#else
if (VFS.Current.FileExists(targetName))
{
#endif
if ( (overwrite_ == Overwrite.Prompt) && (confirmDelegate_ != null) ) {
proceed = confirmDelegate_(targetName);
}
else {
proceed = false;
}
}
}
if ( proceed ) {
if ( events_ != null ) {
continueRunning_ = events_.OnProcessFile(entry.Name);
}
if ( continueRunning_ ) {
try
{
#if !PCL
using ( FileStream outputStream = File.Create(targetName) ) {
#else
using (Stream outputStream = VFS.Current.CreateFile(targetName))
{
#endif
if ( buffer_ == null ) {
buffer_ = new byte[4096];
}
if ((events_ != null) && (events_.Progress != null))
{
StreamUtils.Copy(zipFile_.GetInputStream(entry), outputStream, buffer_,
events_.Progress, events_.ProgressInterval, this, entry.Name, entry.Size);
}
else
{
StreamUtils.Copy(zipFile_.GetInputStream(entry), outputStream, buffer_);
}
if (events_ != null) {
continueRunning_ = events_.OnCompletedFile(entry.Name);
}
}
#if !NETCF_1_0 && !NETCF_2_0
if ( restoreDateTimeOnExtract_ )
{
#if !PCL
File.SetLastWriteTime(targetName, entry.DateTime);
#else
VFS.Current.SetLastWriteTime(targetName, entry.DateTime);
#endif
}
if ( RestoreAttributesOnExtract && entry.IsDOSEntry && (entry.ExternalFileAttributes != -1)) {
FileAttributes fileAttributes = (FileAttributes) entry.ExternalFileAttributes;
// TODO: FastZip - Setting of other file attributes on extraction is a little trickier.
fileAttributes &= (FileAttributes.Archive | FileAttributes.Normal | FileAttributes.ReadOnly | FileAttributes.Hidden);
#if !PCL
File.SetAttributes(targetName, fileAttributes);
#else
VFS.Current.SetAttributes(targetName, fileAttributes);
#endif
}
#endif
}
catch(Exception ex) {
if ( events_ != null ) {
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
else {
continueRunning_ = false;
throw;
}
}
}
}
}
void ExtractEntry(ZipEntry entry)
{
bool doExtraction = entry.IsCompressionMethodSupported();
string targetName = entry.Name;
if ( doExtraction ) {
if ( entry.IsFile ) {
targetName = extractNameTransform_.TransformFile(targetName);
}
else if ( entry.IsDirectory ) {
targetName = extractNameTransform_.TransformDirectory(targetName);
}
doExtraction = !((targetName == null) || (targetName.Length == 0));
}
// TODO: Fire delegate/throw exception were compression method not supported, or name is invalid?
string dirName = null;
if ( doExtraction ) {
if ( entry.IsDirectory ) {
dirName = targetName;
}
else
{
#if !PCL
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
#else
dirName = Path.GetDirectoryName(VFS.Current.GetFullPath(targetName));
#endif
}
}
#if !PCL
if ( doExtraction && !Directory.Exists(dirName) ) {
#else
if (doExtraction && !VFS.Current.DirectoryExists(dirName))
{
#endif
if ( !entry.IsDirectory || CreateEmptyDirectories ) {
try
{
#if !PCL
Directory.CreateDirectory(dirName);
#else
VFS.Current.CreateDirectory(dirName);
#endif
}
catch (Exception ex) {
doExtraction = false;
if ( events_ != null ) {
if ( entry.IsDirectory ) {
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
}
else {
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
}
else {
continueRunning_ = false;
throw;
}
}
}
}
if ( doExtraction && entry.IsFile ) {
ExtractFileEntry(entry, targetName);
}
}
#if !PCL
static int MakeExternalAttributes(FileInfo info)
{
return (int)info.Attributes;
}
#else
static int MakeExternalAttributes(IFileInfo info)
{
return (int)info.Attributes;
}
public bool IsCompressionMethodSupported()
{
return(ZipEntry.IsCompressionMethodSupported(this.CompressionMethod));
}
void ExtractEntry(ZipEntry entry)
{
bool doExtraction = entry.IsCompressionMethodSupported();
string targetName = entry.Name;
using (var store = IsolatedStorageFile.GetUserStoreForApplication())
{
if ( doExtraction ) {
if ( entry.IsFile ) {
targetName = extractNameTransform_.TransformFile(targetName);
}
else if ( entry.IsDirectory ) {
targetName = extractNameTransform_.TransformDirectory(targetName);
}
doExtraction = !string.IsNullOrEmpty(targetName);
}
// TODO: Fire delegate/throw exception were compression method not supported, or name is invalid?
string dirName = null;
if ( doExtraction ) {
if ( entry.IsDirectory ) {
dirName = targetName;
}
else {
dirName = Path.GetDirectoryName(targetName);
}
}
if (doExtraction && !store.DirectoryExists(dirName))
{
if ( !entry.IsDirectory || CreateEmptyDirectories ) {
try {
store.CreateDirectory(dirName);
}
catch (Exception ex) {
doExtraction = false;
if ( events_ != null ) {
if ( entry.IsDirectory ) {
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
}
else {
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
}
else {
continueRunning_ = false;
throw;
}
}
}
}
}
if ( doExtraction && entry.IsFile ) {
ExtractFileEntry(entry, targetName);
}
}
void ExtractFileEntry(ZipEntry entry, string targetName)
{
bool proceed = true;
if (overwrite_ != Overwrite.Always)
{
#if !PCL
if (File.Exists(targetName))
{
#else
if (VFS.Current.FileExists(targetName))
{
#endif
if ((overwrite_ == Overwrite.Prompt) && (confirmDelegate_ != null))
{
proceed = confirmDelegate_(targetName);
}
else
{
proceed = false;
}
}
}
if (proceed)
{
if (events_ != null)
{
continueRunning_ = events_.OnProcessFile(entry.Name);
}
if (continueRunning_)
{
try
{
#if !PCL
using (FileStream outputStream = File.Create(targetName)) {
#else
using (Stream outputStream = VFS.Current.CreateFile(targetName))
{
#endif
if (buffer_ == null)
{
buffer_ = new byte[4096];
}
if ((events_ != null) && (events_.Progress != null))
{
StreamUtils.Copy(zipFile_.GetInputStream(entry), outputStream, buffer_,
events_.Progress, events_.ProgressInterval, this, entry.Name, entry.Size);
}
else
{
StreamUtils.Copy(zipFile_.GetInputStream(entry), outputStream, buffer_);
}
if (events_ != null)
{
continueRunning_ = events_.OnCompletedFile(entry.Name);
}
}
#if !NETCF_1_0 && !NETCF_2_0
if (restoreDateTimeOnExtract_)
{
#if !PCL
File.SetLastWriteTime(targetName, entry.DateTime);
#else
VFS.Current.SetLastWriteTime(targetName, entry.DateTime);
#endif
}
if (RestoreAttributesOnExtract && entry.IsDOSEntry && (entry.ExternalFileAttributes != -1))
{
FileAttributes fileAttributes = (FileAttributes)entry.ExternalFileAttributes;
// TODO: FastZip - Setting of other file attributes on extraction is a little trickier.
fileAttributes &= (FileAttributes.Archive | FileAttributes.Normal | FileAttributes.ReadOnly | FileAttributes.Hidden);
#if !PCL
File.SetAttributes(targetName, fileAttributes);
#else
VFS.Current.SetAttributes(targetName, fileAttributes);
#endif
}
#endif
}
catch (Exception ex) {
if (events_ != null)
{
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
else
{
continueRunning_ = false;
throw;
}
}
}
}
}
void ExtractEntry(ZipEntry entry)
{
bool doExtraction = entry.IsCompressionMethodSupported();
string targetName = entry.Name;
if (doExtraction)
{
if (entry.IsFile)
{
targetName = extractNameTransform_.TransformFile(targetName);
}
else if (entry.IsDirectory)
{
targetName = extractNameTransform_.TransformDirectory(targetName);
}
doExtraction = !((targetName == null) || (targetName.Length == 0));
}
// TODO: Fire delegate/throw exception were compression method not supported, or name is invalid?
string dirName = null;
if (doExtraction)
{
if (entry.IsDirectory)
{
dirName = targetName;
}
else
{
#if !PCL
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
#else
dirName = Path.GetDirectoryName(VFS.Current.GetFullPath(targetName));
#endif
}
}
#if !PCL
if (doExtraction && !Directory.Exists(dirName))
{
#else
if (doExtraction && !VFS.Current.DirectoryExists(dirName))
{
#endif
if (!entry.IsDirectory || CreateEmptyDirectories)
{
try
{
#if !PCL
Directory.CreateDirectory(dirName);
#else
VFS.Current.CreateDirectory(dirName);
#endif
}
catch (Exception ex) {
doExtraction = false;
if (events_ != null)
{
if (entry.IsDirectory)
{
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
}
else
{
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
}
else
{
continueRunning_ = false;
throw;
}
}
}
}
if (doExtraction && entry.IsFile)
{
ExtractFileEntry(entry, targetName);
}
}
void ExtractEntry(ZipEntry entry)
{
bool doExtraction = entry.IsCompressionMethodSupported();
string targetName = entry.Name;
if ( doExtraction ) {
if ( entry.IsFile ) {
targetName = extractNameTransform_.TransformFile(targetName);
}
else if ( entry.IsDirectory ) {
targetName = extractNameTransform_.TransformDirectory(targetName);
}
doExtraction = !((targetName == null) || (targetName.Length == 0));
}
// TODO: Fire delegate/throw exception were compression method not supported, or name is invalid?
string dirName = null;
if ( doExtraction ) {
if ( entry.IsDirectory ) {
dirName = targetName;
}
else {
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
}
}
if ( doExtraction && !Directory.Exists(dirName) ) {
if ( !entry.IsDirectory || CreateEmptyDirectories ) {
try {
Directory.CreateDirectory(dirName);
}
catch (Exception ex) {
doExtraction = false;
if ( events_ != null ) {
if ( entry.IsDirectory ) {
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
}
else {
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
}
else {
continueRunning_ = false;
throw;
}
}
}
}
if ( doExtraction && entry.IsFile ) {
ExtractFileEntry(entry, targetName);
}
}
void ExtractEntry(ZipEntry entry)
{
bool doExtraction = NameIsValid(entry.Name) && entry.IsCompressionMethodSupported();
// TODO: Fire delegate were compression method not supported.
string dirName = null;
string targetName = null;
if ( doExtraction ) {
string entryFileName;
if (Path.IsPathRooted(entry.Name)) {
string workName = Path.GetPathRoot(entry.Name);
workName = entry.Name.Substring(workName.Length);
entryFileName = Path.Combine(Path.GetDirectoryName(workName), Path.GetFileName(entry.Name));
}
else {
entryFileName = entry.Name;
}
targetName = Path.Combine(targetDirectory_, entryFileName);
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
doExtraction = (entryFileName.Length > 0);
}
if ( doExtraction && !Directory.Exists(dirName) ) {
if ( !entry.IsDirectory || CreateEmptyDirectories ) {
try {
Directory.CreateDirectory(dirName);
}
catch {
doExtraction = false;
}
}
}
if ( doExtraction && entry.IsFile ) {
ExtractFileEntry(entry, targetName);
}
}
/// <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();
}
int header = inputBuffer.ReadLeInt();
if (header == ZipConstants.CentralHeaderSignature ||
header == ZipConstants.EndOfCentralDirectorySignature ||
header == ZipConstants.CentralHeaderDigitalSignature ||
header == ZipConstants.ArchiveExtraDataSignature ||
header == ZipConstants.Zip64CentralFileHeaderSignature) {
// No more individual entries exist
Close();
return null;
}
// -jr- 07-Dec-2003 Ignore spanning temporary signatures if found
// Spanning signature is same as descriptor signature and is untested as yet.
if ( (header == ZipConstants.SpanningTempSignature) || (header == ZipConstants.SpanningSignature) ) {
header = inputBuffer.ReadLeInt();
}
if (header != ZipConstants.LocalHeaderSignature) {
throw new ZipException("Wrong Local header signature: 0x" + String.Format("{0:X}", header));
}
short versionRequiredToExtract = (short)inputBuffer.ReadLeShort();
flags = inputBuffer.ReadLeShort();
method = inputBuffer.ReadLeShort();
uint dostime = (uint)inputBuffer.ReadLeInt();
int crc2 = inputBuffer.ReadLeInt();
csize = inputBuffer.ReadLeInt();
size = inputBuffer.ReadLeInt();
int nameLen = inputBuffer.ReadLeShort();
int extraLen = inputBuffer.ReadLeShort();
bool isCrypted = (flags & 1) == 1;
byte[] buffer = new byte[nameLen];
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 = crc2 & 0xFFFFFFFFL;
entry.Size = size & 0xFFFFFFFFL;
entry.CompressedSize = csize & 0xFFFFFFFFL;
entry.CryptoCheckValue = (byte)((crc2 >> 24) & 0xff);
} else {
// This allows for GNU, WinZip and possibly other archives, the PKZIP spec
// says these values 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.CryptoCheckValue = (byte)((dostime >> 8) & 0xff);
}
entry.DosTime = dostime;
// If local header requires Zip64 is true then the extended header should contain
// both values.
// Handle extra data if present. This can set/alter some fields of the entry.
if (extraLen > 0) {
byte[] extra = new byte[extraLen];
inputBuffer.ReadRawBuffer(extra);
entry.ExtraData = extra;
}
entry.ProcessExtraData(true);
if ( entry.CompressedSize >= 0 ) {
csize = entry.CompressedSize;
}
if ( entry.Size >= 0 ) {
size = entry.Size;
}
if (method == (int)CompressionMethod.Stored && (!isCrypted && csize != size || (isCrypted && csize - ZipConstants.CryptoHeaderSize != size))) {
throw new ZipException("Stored, but compressed != uncompressed");
}
// Determine how to handle reading of data if this is attempted.
if (entry.IsCompressionMethodSupported()) {
internalReader = new ReadDataHandler(InitialRead);
} else {
internalReader = new ReadDataHandler(ReadingNotSupported);
}
return entry;
}
void ExtractEntry(ZipEntry entry)
{
bool doExtraction = entry.IsCompressionMethodSupported();
string targetName = entry.Name;
if (doExtraction)
{
if (entry.IsFile)
{
targetName = extractNameTransform_.TransformFile(targetName);
}
else if (entry.IsDirectory)
{
targetName = extractNameTransform_.TransformDirectory(targetName);
}
doExtraction = !((targetName == null) || (targetName.Length == 0));
}
string dirName = null;
if (doExtraction)
{
if (entry.IsDirectory)
{
dirName = targetName;
}
else
{
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
}
}
if (doExtraction && !Directory.Exists(dirName))
{
if (!entry.IsDirectory || CreateEmptyDirectories)
{
try {
Directory.CreateDirectory(dirName);
}
catch (Exception ex) {
doExtraction = false;
if (events_ != null)
{
if (entry.IsDirectory)
{
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
}
else
{
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
}
else
{
continueRunning_ = false;
throw;
}
}
}
}
if (doExtraction && entry.IsFile)
{
ExtractFileEntry(entry, targetName);
}
}
void ExtractEntry(ZipEntry entry)
{
bool doExtraction = false;
string nameText = entry.Name;
if ( entry.IsFile ) {
//-TODO Translate invalid names allowing extraction still.
doExtraction = NameIsValid(nameText) && entry.IsCompressionMethodSupported();
}
else if ( entry.IsDirectory ) {
doExtraction = NameIsValid(nameText);
}
//-TODO Fire delegate were compression method not supported, or name is invalid?
string dirName = null;
string targetName = null;
if ( doExtraction ) {
// Handle invalid entry names by chopping of path root.
if (Path.IsPathRooted(nameText)) {
string workName = Path.GetPathRoot(nameText);
nameText = nameText.Substring(workName.Length);
}
if ( nameText.Length > 0 ) {
targetName = Path.Combine(targetDirectory_, nameText);
if ( entry.IsDirectory ) {
dirName = targetName;
}
else {
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
}
}
else {
doExtraction = false;
}
}
if ( doExtraction && !Directory.Exists(dirName) ) {
if ( !entry.IsDirectory || CreateEmptyDirectories ) {
try {
Directory.CreateDirectory(dirName);
}
catch (Exception ex) {
doExtraction = false;
if ( events_ != null ) {
if ( entry.IsDirectory ) {
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
}
else {
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
}
else {
continueRunning_ = false;
}
}
}
}
if ( doExtraction && entry.IsFile ) {
ExtractFileEntry(entry, targetName);
}
}
private void ExtractEntry(ZipEntry entry)
{
bool doExtraction = entry.IsCompressionMethodSupported();
string targetName = entry.Name;
if (doExtraction)
{
if (entry.IsFile)
{
targetName = extractNameTransform_.TransformFile(targetName);
}
else if (entry.IsDirectory)
{
targetName = extractNameTransform_.TransformDirectory(targetName);
}
doExtraction = !(string.IsNullOrEmpty(targetName));
}
// TODO: Fire delegate/throw exception were compression method not supported, or name is invalid?
string dirName = string.Empty;
if (doExtraction)
{
if (entry.IsDirectory)
{
dirName = targetName;
}
else
{
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
}
}
if (doExtraction && !Directory.Exists(dirName))
{
if (!entry.IsDirectory || CreateEmptyDirectories)
{
try
{
continueRunning_ = events_?.OnProcessDirectory(dirName, true) ?? true;
if (continueRunning_)
{
Directory.CreateDirectory(dirName);
if (entry.IsDirectory && restoreDateTimeOnExtract_)
{
switch (entryFactory_.Setting)
{
case TimeSetting.CreateTime:
Directory.SetCreationTime(dirName, entry.DateTime);
break;
case TimeSetting.CreateTimeUtc:
Directory.SetCreationTimeUtc(dirName, entry.DateTime);
break;
case TimeSetting.LastAccessTime:
Directory.SetLastAccessTime(dirName, entry.DateTime);
break;
case TimeSetting.LastAccessTimeUtc:
Directory.SetLastAccessTimeUtc(dirName, entry.DateTime);
break;
case TimeSetting.LastWriteTime:
Directory.SetLastWriteTime(dirName, entry.DateTime);
break;
case TimeSetting.LastWriteTimeUtc:
Directory.SetLastWriteTimeUtc(dirName, entry.DateTime);
break;
case TimeSetting.Fixed:
Directory.SetLastWriteTime(dirName, entryFactory_.FixedDateTime);
break;
default:
throw new ZipException("Unhandled time setting in ExtractEntry");
}
}
}
else
{
doExtraction = false;
}
}
catch (Exception ex)
{
doExtraction = false;
if (events_ != null)
{
if (entry.IsDirectory)
{
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
}
else
{
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
}
else
{
continueRunning_ = false;
throw;
}
}
}
}
if (doExtraction && entry.IsFile)
{
ExtractFileEntry(entry, targetName);
}
}
/// <summary>
/// Test a local header against that provided from the central directory
/// </summary>
/// <param name="entry">
/// The entry to test against
/// </param>
/// <param name="tests">The type of <see cref="HeaderTest">tests</see> to carry out.</param>
/// <returns>The offset of the entries data in the file</returns>
long TestLocalHeader(ZipEntry entry, HeaderTest tests)
{
lock(baseStream_)
{
bool testHeader = (tests & HeaderTest.Header) != 0;
bool testData = (tests & HeaderTest.Extract) != 0;
baseStream_.Seek(offsetOfFirstEntry + entry.Offset, SeekOrigin.Begin);
if ((int)ReadLEUint() != ZipConstants.LocalHeaderSignature) {
throw new ZipException(string.Format("Wrong local header signature @{0:X}", offsetOfFirstEntry + entry.Offset));
}
short extractVersion = ( short ) (ReadLEUshort() & 0x00ff);
short localFlags = ( short )ReadLEUshort();
short compressionMethod = ( short )ReadLEUshort();
short fileTime = ( short )ReadLEUshort();
short fileDate = ( short )ReadLEUshort();
uint crcValue = ReadLEUint();
long compressedSize = ReadLEUint();
long size = ReadLEUint();
int storedNameLength = ReadLEUshort();
int extraDataLength = ReadLEUshort();
byte[] nameData = new byte[storedNameLength];
StreamUtils.ReadFully(baseStream_, nameData);
byte[] extraData = new byte[extraDataLength];
StreamUtils.ReadFully(baseStream_, extraData);
ZipExtraData localExtraData = new ZipExtraData(extraData);
// Extra data / zip64 checks
if (localExtraData.Find(1))
{
// 2010-03-04 Forum 10512: removed checks for version >= ZipConstants.VersionZip64
// and size or compressedSize = MaxValue, due to rogue creators.
size = localExtraData.ReadLong();
compressedSize = localExtraData.ReadLong();
if ((localFlags & (int)GeneralBitFlags.Descriptor) != 0)
{
// These may be valid if patched later
if ( (size != -1) && (size != entry.Size)) {
throw new ZipException("Size invalid for descriptor");
}
if ((compressedSize != -1) && (compressedSize != entry.CompressedSize)) {
throw new ZipException("Compressed size invalid for descriptor");
}
}
}
else
{
// No zip64 extra data but entry requires it.
if ((extractVersion >= ZipConstants.VersionZip64) &&
(((uint)size == uint.MaxValue) || ((uint)compressedSize == uint.MaxValue)))
{
throw new ZipException("Required Zip64 extended information missing");
}
}
if ( testData ) {
if ( entry.IsFile ) {
if ( !entry.IsCompressionMethodSupported() ) {
throw new ZipException("Compression method not supported");
}
if ( (extractVersion > ZipConstants.VersionMadeBy)
|| ((extractVersion > 20) && (extractVersion < ZipConstants.VersionZip64)) ) {
throw new ZipException(string.Format("Version required to extract this entry not supported ({0})", extractVersion));
}
if ( (localFlags & ( int )(GeneralBitFlags.Patched | GeneralBitFlags.StrongEncryption | GeneralBitFlags.EnhancedCompress | GeneralBitFlags.HeaderMasked)) != 0 ) {
throw new ZipException("The library does not support the zip version required to extract this entry");
}
}
}
if (testHeader)
{
if ((extractVersion <= 63) && // Ignore later versions as we dont know about them..
(extractVersion != 10) &&
(extractVersion != 11) &&
(extractVersion != 20) &&
(extractVersion != 21) &&
(extractVersion != 25) &&
(extractVersion != 27) &&
(extractVersion != 45) &&
(extractVersion != 46) &&
(extractVersion != 50) &&
(extractVersion != 51) &&
(extractVersion != 52) &&
(extractVersion != 61) &&
(extractVersion != 62) &&
(extractVersion != 63)
)
{
throw new ZipException(string.Format("Version required to extract this entry is invalid ({0})", extractVersion));
}
// Local entry flags dont have reserved bit set on.
if ((localFlags & (int)(GeneralBitFlags.ReservedPKware4 | GeneralBitFlags.ReservedPkware14 | GeneralBitFlags.ReservedPkware15)) != 0)
{
throw new ZipException("Reserved bit flags cannot be set.");
}
// Encryption requires extract version >= 20
if (((localFlags & (int)GeneralBitFlags.Encrypted) != 0) && (extractVersion < 20))
{
throw new ZipException(string.Format("Version required to extract this entry is too low for encryption ({0})", extractVersion));
}
// Strong encryption requires encryption flag to be set and extract version >= 50.
if ((localFlags & (int)GeneralBitFlags.StrongEncryption) != 0)
{
if ((localFlags & (int)GeneralBitFlags.Encrypted) == 0)
{
throw new ZipException("Strong encryption flag set but encryption flag is not set");
}
if (extractVersion < 50)
{
throw new ZipException(string.Format("Version required to extract this entry is too low for encryption ({0})", extractVersion));
}
}
// Patched entries require extract version >= 27
if (((localFlags & (int)GeneralBitFlags.Patched) != 0) && (extractVersion < 27))
{
throw new ZipException(string.Format("Patched data requires higher version than ({0})", extractVersion));
}
// Central header flags match local entry flags.
if (localFlags != entry.Flags)
{
throw new ZipException("Central header/local header flags mismatch");
}
// Central header compression method matches local entry
if (entry.CompressionMethod != (CompressionMethod)compressionMethod)
{
throw new ZipException("Central header/local header compression method mismatch");
}
if (entry.Version != extractVersion)
{
throw new ZipException("Extract version mismatch");
}
// Strong encryption and extract version match
if ((localFlags & (int)GeneralBitFlags.StrongEncryption) != 0)
{
if (extractVersion < 62)
{
throw new ZipException("Strong encryption flag set but version not high enough");
}
}
if ((localFlags & (int)GeneralBitFlags.HeaderMasked) != 0)
{
if ((fileTime != 0) || (fileDate != 0))
{
throw new ZipException("Header masked set but date/time values non-zero");
}
}
if ((localFlags & (int)GeneralBitFlags.Descriptor) == 0)
{
if (crcValue != (uint)entry.Crc)
{
throw new ZipException("Central header/local header crc mismatch");
}
}
// Crc valid for empty entry.
// This will also apply to streamed entries where size isnt known and the header cant be patched
if ((size == 0) && (compressedSize == 0))
{
if (crcValue != 0)
{
throw new ZipException("Invalid CRC for empty entry");
}
}
// TODO: make test more correct... can't compare lengths as was done originally as this can fail for MBCS strings
// Assuming a code page at this point is not valid? Best is to store the name length in the ZipEntry probably
if (entry.Name.Length > storedNameLength)
{
throw new ZipException("File name length mismatch");
}
// Name data has already been read convert it and compare.
string localName = ZipConstants.ConvertToStringExt(localFlags, nameData);
// Central directory and local entry name match
if (localName != entry.Name)
{
throw new ZipException("Central header and local header file name mismatch");
}
// Directories have zero actual size but can have compressed size
if (entry.IsDirectory)
{
if (size > 0)
{
throw new ZipException("Directory cannot have size");
}
// There may be other cases where the compressed size can be greater than this?
// If so until details are known we will be strict.
if (entry.IsCrypted)
{
if (compressedSize > ZipConstants.CryptoHeaderSize + 2)
{
throw new ZipException("Directory compressed size invalid");
}
}
else if (compressedSize > 2)
{
// When not compressed the directory size can validly be 2 bytes
// if the true size wasnt known when data was originally being written.
// NOTE: Versions of the library 0.85.4 and earlier always added 2 bytes
throw new ZipException("Directory compressed size invalid");
}
}
if (!ZipNameTransform.IsValidName(localName, true))
{
throw new ZipException("Name is invalid");
}
}
// Tests that apply to both data and header.
// Size can be verified only if it is known in the local header.
// it will always be known in the central header.
if (((localFlags & (int)GeneralBitFlags.Descriptor) == 0) ||
((size > 0 || compressedSize > 0) && entry.Size > 0)) {
if ((size != 0)
&& (size != entry.Size)) {
throw new ZipException(
string.Format("Size mismatch between central header({0}) and local header({1})",
entry.Size, size));
}
if ((compressedSize != 0)
&& (compressedSize != entry.CompressedSize && compressedSize != 0xFFFFFFFF && compressedSize != -1)) {
throw new ZipException(
string.Format("Compressed size mismatch between central header({0}) and local header({1})",
entry.CompressedSize, compressedSize));
}
}
int extraLength = storedNameLength + extraDataLength;
return offsetOfFirstEntry + entry.Offset + ZipConstants.LocalHeaderBaseSize + extraLength;
}
}
public ZipEntry GetNextEntry()
{
//IL_000d: Unknown result type (might be due to invalid IL or missing references)
if (crc == null)
{
throw new InvalidOperationException("Closed.");
}
if (entry != null)
{
CloseEntry();
}
int num = inputBuffer.ReadLeInt();
switch (num)
{
case 33639248:
case 84233040:
case 101010256:
case 101075792:
case 117853008:
((Stream)this).Close();
return(null);
case 134695760:
case 808471376:
num = inputBuffer.ReadLeInt();
break;
}
if (num != 67324752)
{
throw new ZipException("Wrong Local header signature: 0x" + $"{num:X}");
}
short versionRequiredToExtract = (short)inputBuffer.ReadLeShort();
flags = inputBuffer.ReadLeShort();
method = inputBuffer.ReadLeShort();
uint num2 = (uint)inputBuffer.ReadLeInt();
int num3 = inputBuffer.ReadLeInt();
csize = inputBuffer.ReadLeInt();
size = inputBuffer.ReadLeInt();
int num4 = inputBuffer.ReadLeShort();
int num5 = inputBuffer.ReadLeShort();
bool flag = (flags & 1) == 1;
byte[] array = new byte[num4];
inputBuffer.ReadRawBuffer(array);
string name = ZipConstants.ConvertToStringExt(flags, array);
entry = new ZipEntry(name, versionRequiredToExtract);
entry.Flags = flags;
entry.CompressionMethod = (CompressionMethod)method;
if ((flags & 8) == 0)
{
entry.Crc = num3 & 0xFFFFFFFFu;
entry.Size = size & 0xFFFFFFFFu;
entry.CompressedSize = csize & 0xFFFFFFFFu;
entry.CryptoCheckValue = (byte)((uint)(num3 >> 24) & 0xFFu);
}
else
{
if (num3 != 0)
{
entry.Crc = num3 & 0xFFFFFFFFu;
}
if (size != 0)
{
entry.Size = size & 0xFFFFFFFFu;
}
if (csize != 0)
{
entry.CompressedSize = csize & 0xFFFFFFFFu;
}
entry.CryptoCheckValue = (byte)((num2 >> 8) & 0xFFu);
}
entry.DosTime = num2;
if (num5 > 0)
{
byte[] array2 = new byte[num5];
inputBuffer.ReadRawBuffer(array2);
entry.ExtraData = array2;
}
entry.ProcessExtraData(localHeader: true);
if (entry.CompressedSize >= 0)
{
csize = entry.CompressedSize;
}
if (entry.Size >= 0)
{
size = entry.Size;
}
if (method == 0 && ((!flag && csize != size) || (flag && csize - 12 != size)))
{
throw new ZipException("Stored, but compressed != uncompressed");
}
if (entry.IsCompressionMethodSupported())
{
internalReader = InitialRead;
}
else
{
internalReader = ReadingNotSupported;
}
return(entry);
}
