| public Find ( int headerID ) : bool | ||
| headerID | int | The identifier for the value to find. |
| return | bool | |
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData zipExtraData = new ZipExtraData(this.extra);
if (zipExtraData.Find(1))
{
this.forceZip64_ = true;
if (zipExtraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (this.size == (ulong)-1)
{
this.size = (ulong)zipExtraData.ReadLong();
}
if (this.compressedSize == (ulong)-1)
{
this.compressedSize = (ulong)zipExtraData.ReadLong();
}
if (!localHeader && this.offset == (long)((ulong)-1))
{
this.offset = zipExtraData.ReadLong();
}
}
else if ((this.versionToExtract & 255) >= 45 && (this.size == (ulong)-1 || this.compressedSize == (ulong)-1))
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
this.DateTime = this.GetDateTime(zipExtraData);
if (this.method == CompressionMethod.WinZipAES)
{
this.ProcessAESExtraData(zipExtraData);
}
}
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData zipExtraData = new ZipExtraData(extra);
if (zipExtraData.Find(1))
{
forceZip64_ = true;
if (zipExtraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (size == uint.MaxValue)
{
size = (ulong)zipExtraData.ReadLong();
}
if (compressedSize == uint.MaxValue)
{
compressedSize = (ulong)zipExtraData.ReadLong();
}
if (!localHeader && offset == uint.MaxValue)
{
offset = zipExtraData.ReadLong();
}
}
else if ((versionToExtract & 0xFF) >= 45 && (size == uint.MaxValue || compressedSize == uint.MaxValue))
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
DateTime = GetDateTime(zipExtraData);
if (method == CompressionMethod.WinZipAES)
{
ProcessAESExtraData(zipExtraData);
}
}
// For AES the method in the entry is 99, and the real compression method is in the extradata
//
private void ProcessAESExtraData(ZipExtraData extraData)
{
if (extraData.Find(0x9901))
{
// Set version and flag for Zipfile.CreateAndInitDecryptionStream
versionToExtract = ZipConstants.VERSION_AES; // Ver 5.1 = AES see "Version" getter
// Set StrongEncryption flag for ZipFile.CreateAndInitDecryptionStream
Flags = Flags | (int)GeneralBitFlags.StrongEncryption;
//
// Unpack AES extra data field see http://www.winzip.com/aes_info.htm
int length = extraData.ValueLength; // Data size currently 7
if (length < 7)
{
throw new ZipException("AES Extra Data Length " + length + " invalid.");
}
int ver = extraData.ReadShort(); // Version number (1=AE-1 2=AE-2)
int vendorId = extraData.ReadShort(); // 2-character vendor ID 0x4541 = "AE"
int encrStrength = extraData.ReadByte(); // encryption strength 1 = 128 2 = 192 3 = 256
int actualCompress = extraData.ReadShort(); // The actual compression method used to compress the file
_aesVer = ver;
_aesEncryptionStrength = encrStrength;
method = (CompressionMethod)actualCompress;
}
else
{
throw new ZipException("AES Extra Data missing");
}
}
/// <summary>
/// Process extra data fields updating the entry based on the contents.
/// </summary>
/// <param name="localHeader">True if the extra data fields should be handled
/// for a local header, rather than for a central header.
/// </param>
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData extraData = new ZipExtraData(this.extra);
if (extraData.Find(0x0001))
{
// Version required to extract is ignored here as some archivers dont set it correctly
// in theory it should be version 45 or higher
// The recorded size will change but remember that this is zip64.
forceZip64_ = true;
if (extraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (localHeader || (size == uint.MaxValue))
{
size = (ulong)extraData.ReadLong();
}
if (localHeader || (compressedSize == uint.MaxValue))
{
compressedSize = (ulong)extraData.ReadLong();
}
if (!localHeader && (offset == uint.MaxValue))
{
offset = extraData.ReadLong();
}
// Disk number on which file starts is ignored
}
else
{
if (
((versionToExtract & 0xff) >= ZipConstants.VersionZip64) &&
((size == uint.MaxValue) || (compressedSize == uint.MaxValue))
)
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
dateTime = GetDateTime(extraData);
if (method == CompressionMethod.WinZipAES)
{
ProcessAESExtraData(extraData);
}
}
private void ProcessAESExtraData(ZipExtraData extraData)
{
if (!extraData.Find(39169))
{
throw new Exception("AES Extra Data missing");
}
this.versionToExtract = 51;
this.Flags |= 64;
int valueLength = extraData.ValueLength;
if (valueLength < 7)
{
throw new Exception("AES Extra Data Length " + valueLength + " invalid.");
}
extraData.ReadShort();
extraData.ReadShort();
extraData.ReadByte();
int num = extraData.ReadShort();
this.method = (CompressionMethod)num;
}
private void ProcessAESExtraData(ZipExtraData extraData)
{
if (extraData.Find(39169))
{
versionToExtract = 51;
Flags |= 64;
int valueLength = extraData.ValueLength;
if (valueLength < 7)
{
throw new ZipException("AES Extra Data Length " + valueLength + " invalid.");
}
int aesVer = extraData.ReadShort();
extraData.ReadShort();
int aesEncryptionStrength = extraData.ReadByte();
int num = extraData.ReadShort();
_aesVer = aesVer;
_aesEncryptionStrength = aesEncryptionStrength;
method = (CompressionMethod)num;
return;
}
throw new ZipException("AES Extra Data missing");
}
private void ProcessAESExtraData(ZipExtraData extraData)
{
if (!extraData.Find(0x9901))
{
throw new ZipException("AES Extra Data missing");
}
this.versionToExtract = 0x33;
this.Flags |= 0x40;
int valueLength = extraData.ValueLength;
if (valueLength < 7)
{
throw new ZipException("AES Extra Data Length " + valueLength + " invalid.");
}
int num2 = extraData.ReadShort();
int num3 = extraData.ReadShort();
int num4 = extraData.ReadByte();
int num5 = extraData.ReadShort();
this._aesVer = num2;
this._aesEncryptionStrength = num4;
this.method = (ICSharpCode.SharpZipLib.Zip.CompressionMethod)num5;
}
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData zipExtraData = new ZipExtraData(this.extra);
if (zipExtraData.Find(1))
{
this.forceZip64_ = true;
if (zipExtraData.ValueLength < 4)
{
throw new Exception("Extra data extended Zip64 information length is invalid");
}
if (localHeader || this.size == (ulong)-1)
{
this.size = (ulong)zipExtraData.ReadLong();
}
if (localHeader || this.compressedSize == (ulong)-1)
{
this.compressedSize = (ulong)zipExtraData.ReadLong();
}
if (!localHeader && this.offset == (long)((ulong)-1))
{
this.offset = zipExtraData.ReadLong();
}
}
else if ((this.versionToExtract & 255) >= 45 && (this.size == (ulong)-1 || this.compressedSize == (ulong)-1))
{
throw new Exception("Zip64 Extended information required but is missing.");
}
if (zipExtraData.Find(10))
{
if (zipExtraData.ValueLength < 4)
{
throw new Exception("NTFS Extra data invalid");
}
zipExtraData.ReadInt();
while (zipExtraData.UnreadCount >= 4)
{
int num = zipExtraData.ReadShort();
int num2 = zipExtraData.ReadShort();
if (num == 1)
{
if (num2 >= 24)
{
long fileTime = zipExtraData.ReadLong();
zipExtraData.ReadLong();
zipExtraData.ReadLong();
this.DateTime = DateTime.FromFileTime(fileTime);
}
break;
}
zipExtraData.Skip(num2);
}
}
else if (zipExtraData.Find(21589))
{
int valueLength = zipExtraData.ValueLength;
int num3 = zipExtraData.ReadByte();
if ((num3 & 1) != 0 && valueLength >= 5)
{
int seconds = zipExtraData.ReadInt();
DateTime dateTime = new DateTime(1970, 1, 1, 0, 0, 0);
this.DateTime = (dateTime.ToUniversalTime() + new TimeSpan(0, 0, 0, seconds, 0)).ToLocalTime();
}
}
if (this.method == CompressionMethod.WinZipAES)
{
this.ProcessAESExtraData(zipExtraData);
}
}
// Write the local file header
// TODO: ZipHelperStream.WriteLocalHeader is not yet used and needs checking for ZipFile and ZipOuptutStream usage
void WriteLocalHeader(ZipEntry entry, EntryPatchData patchData)
{
CompressionMethod method = entry.CompressionMethod;
bool headerInfoAvailable = true; // How to get this?
bool patchEntryHeader = false;
WriteLEInt(ZipConstants.LocalHeaderSignature);
WriteLEShort(entry.Version);
WriteLEShort(entry.Flags);
WriteLEShort((byte)method);
WriteLEInt((int)entry.DosTime);
if (headerInfoAvailable)
{
WriteLEInt((int)entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
WriteLEInt(-1);
WriteLEInt(-1);
}
else
{
WriteLEInt(entry.IsCrypted ? (int)entry.CompressedSize + ZipConstants.CryptoHeaderSize : (int)entry.CompressedSize);
WriteLEInt((int)entry.Size);
}
}
else
{
if (patchData != null)
{
patchData.CrcPatchOffset = stream_.Position;
}
WriteLEInt(0); // Crc
if (patchData != null)
{
patchData.SizePatchOffset = stream_.Position;
}
// For local header both sizes appear in Zip64 Extended Information
if (entry.LocalHeaderRequiresZip64 && patchEntryHeader)
{
WriteLEInt(-1);
WriteLEInt(-1);
}
else
{
WriteLEInt(0); // Compressed size
WriteLEInt(0); // Uncompressed size
}
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (name.Length > 0xFFFF)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64 && (headerInfoAvailable || patchEntryHeader))
{
ed.StartNewEntry();
if (headerInfoAvailable)
{
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
}
else
{
ed.AddLeLong(-1);
ed.AddLeLong(-1);
}
ed.AddNewEntry(1);
if (!ed.Find(1))
{
throw new ZipException("Internal error cant find extra data");
}
if (patchData != null)
{
patchData.SizePatchOffset = ed.CurrentReadIndex;
}
}
else
{
ed.Delete(1);
}
byte[] extra = ed.GetEntryData();
WriteLEShort(name.Length);
WriteLEShort(extra.Length);
if (name.Length > 0)
{
stream_.Write(name, 0, name.Length);
}
if (entry.LocalHeaderRequiresZip64 && patchEntryHeader)
{
patchData.SizePatchOffset += stream_.Position;
}
if (extra.Length > 0)
{
stream_.Write(extra, 0, extra.Length);
}
}
public void UnreadCountValid()
{
ZipExtraData zed = new ZipExtraData(new byte[] { 1, 0, 0, 0 });
Assert.AreEqual(4, zed.Length, "Length should be 4");
Assert.IsTrue(zed.Find(1), "Should find tag 1");
Assert.AreEqual(0, zed.UnreadCount);
// seven bytes
zed = new ZipExtraData(new byte[] { 1, 0, 7, 0, 1, 2, 3, 4, 5, 6, 7 });
Assert.IsTrue(zed.Find(1), "Should find tag 1");
for (int i = 0; i < 7; ++i) {
Assert.AreEqual(7 - i, zed.UnreadCount);
zed.ReadByte();
}
zed.ReadByte();
Assert.AreEqual(0, zed.UnreadCount);
}
public void ReadOverrunShort()
{
ZipExtraData zed = new ZipExtraData(new byte[] { 1, 0, 0, 0 });
Assert.AreEqual(4, zed.Length, "Length should be 4");
Assert.IsTrue(zed.Find(1), "Should find tag 1");
// Empty Tag
bool exceptionCaught = false;
try {
zed.ReadShort();
}
catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
// Single byte
zed = new ZipExtraData(new byte[] { 1, 0, 1, 0, 1 });
Assert.IsTrue(zed.Find(1), "Should find tag 1");
exceptionCaught = false;
try {
zed.ReadShort();
}
catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
zed = new ZipExtraData(new byte[] { 1, 0, 2, 0, 1, 2 });
Assert.IsTrue(zed.Find(1), "Should find tag 1");
zed.ReadShort();
exceptionCaught = false;
try {
zed.ReadShort();
}
catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
}
public void BasicOperations()
{
ZipExtraData zed = new ZipExtraData(null);
Assert.AreEqual(0, zed.Length);
zed = new ZipExtraData(new byte[] { 1, 0, 0, 0 });
Assert.AreEqual(4, zed.Length, "A length should be 4");
ZipExtraData zed2 = new ZipExtraData();
Assert.AreEqual(0, zed2.Length);
zed2.AddEntry(1, new byte[] { });
byte[] data = zed.GetEntryData();
for (int i = 0; i < data.Length; ++i) {
Assert.AreEqual(zed2.GetEntryData()[i], data[i]);
}
Assert.AreEqual(4, zed2.Length, "A1 length should be 4");
bool findResult = zed.Find(2);
Assert.IsFalse(findResult, "A - Shouldnt find tag 2");
findResult = zed.Find(1);
Assert.IsTrue(findResult, "A - Should find tag 1");
Assert.AreEqual(0, zed.ValueLength, "A- Length of entry should be 0");
Assert.AreEqual(-1, zed.ReadByte());
Assert.AreEqual(0, zed.GetStreamForTag(1).Length, "A - Length of stream should be 0");
zed = new ZipExtraData(new byte[] { 1, 0, 3, 0, 1, 2, 3 });
Assert.AreEqual(7, zed.Length, "Expected a length of 7");
findResult = zed.Find(1);
Assert.IsTrue(findResult, "B - Should find tag 1");
Assert.AreEqual(3, zed.ValueLength, "B - Length of entry should be 3");
for (int i = 1; i <= 3; ++i) {
Assert.AreEqual(i, zed.ReadByte());
}
Assert.AreEqual(-1, zed.ReadByte());
Stream s = zed.GetStreamForTag(1);
Assert.AreEqual(3, s.Length, "B.1 Stream length should be 3");
for (int i = 1; i <= 3; ++i) {
Assert.AreEqual(i, s.ReadByte());
}
Assert.AreEqual(-1, s.ReadByte());
zed = new ZipExtraData(new byte[] { 1, 0, 3, 0, 1, 2, 3, 2, 0, 1, 0, 56 });
Assert.AreEqual(12, zed.Length, "Expected a length of 12");
findResult = zed.Find(1);
Assert.IsTrue(findResult, "C.1 - Should find tag 1");
Assert.AreEqual(3, zed.ValueLength, "C.1 - Length of entry should be 3");
for (int i = 1; i <= 3; ++i) {
Assert.AreEqual(i, zed.ReadByte());
}
Assert.AreEqual(-1, zed.ReadByte());
findResult = zed.Find(2);
Assert.IsTrue(findResult, "C.2 - Should find tag 2");
Assert.AreEqual(1, zed.ValueLength, "C.2 - Length of entry should be 1");
Assert.AreEqual(56, zed.ReadByte());
Assert.AreEqual(-1, zed.ReadByte());
s = zed.GetStreamForTag(2);
Assert.AreEqual(1, s.Length);
Assert.AreEqual(56, s.ReadByte());
Assert.AreEqual(-1, s.ReadByte());
zed = new ZipExtraData();
zed.AddEntry(7, new byte[] { 33, 44, 55 });
findResult = zed.Find(7);
Assert.IsTrue(findResult, "Add.1 should find new tag");
Assert.AreEqual(3, zed.ValueLength, "Add.1 length should be 3");
Assert.AreEqual(33, zed.ReadByte());
Assert.AreEqual(44, zed.ReadByte());
Assert.AreEqual(55, zed.ReadByte());
Assert.AreEqual(-1, zed.ReadByte());
zed.AddEntry(7, null);
findResult = zed.Find(7);
Assert.IsTrue(findResult, "Add.2 should find new tag");
Assert.AreEqual(0, zed.ValueLength, "Add.2 length should be 0");
zed.StartNewEntry();
zed.AddData(0xae);
zed.AddNewEntry(55);
findResult = zed.Find(55);
Assert.IsTrue(findResult, "Add.3 should find new tag");
Assert.AreEqual(1, zed.ValueLength, "Add.3 length should be 1");
Assert.AreEqual(0xae, zed.ReadByte());
Assert.AreEqual(-1, zed.ReadByte());
zed = new ZipExtraData();
zed.StartNewEntry();
zed.AddLeLong(0);
zed.AddLeLong(-4);
zed.AddLeLong(-1);
zed.AddLeLong(long.MaxValue);
zed.AddLeLong(long.MinValue);
zed.AddLeLong(0x123456789ABCDEF0);
zed.AddLeLong(unchecked((long)0xFEDCBA9876543210));
zed.AddNewEntry(567);
s = zed.GetStreamForTag(567);
long longValue = ReadLong(s);
Assert.AreEqual(longValue, zed.ReadLong(), "Read/stream mismatch");
Assert.AreEqual(0, longValue, "Expected long value of zero");
longValue = ReadLong(s);
Assert.AreEqual(longValue, zed.ReadLong(), "Read/stream mismatch");
Assert.AreEqual(-4, longValue, "Expected long value of -4");
longValue = ReadLong(s);
Assert.AreEqual(longValue, zed.ReadLong(), "Read/stream mismatch");
Assert.AreEqual(-1, longValue, "Expected long value of -1");
longValue = ReadLong(s);
Assert.AreEqual(longValue, zed.ReadLong(), "Read/stream mismatch");
Assert.AreEqual(long.MaxValue, longValue, "Expected long value of MaxValue");
longValue = ReadLong(s);
Assert.AreEqual(longValue, zed.ReadLong(), "Read/stream mismatch");
Assert.AreEqual(long.MinValue, longValue, "Expected long value of MinValue");
longValue = ReadLong(s);
Assert.AreEqual(longValue, zed.ReadLong(), "Read/stream mismatch");
Assert.AreEqual(0x123456789abcdef0, longValue, "Expected long value of MinValue");
longValue = ReadLong(s);
Assert.AreEqual(longValue, zed.ReadLong(), "Read/stream mismatch");
Assert.AreEqual(unchecked((long)0xFEDCBA9876543210), longValue, "Expected long value of MinValue");
}
internal void ProcessExtraData(bool localHeader)
{
//IL_0171: Unknown result type (might be due to invalid IL or missing references)
ZipExtraData zipExtraData = new ZipExtraData(extra);
if (zipExtraData.Find(1))
{
forceZip64_ = true;
if (zipExtraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (localHeader || size == 4294967295u)
{
size = (ulong)zipExtraData.ReadLong();
}
if (localHeader || compressedSize == 4294967295u)
{
compressedSize = (ulong)zipExtraData.ReadLong();
}
if (!localHeader && offset == 4294967295u)
{
offset = zipExtraData.ReadLong();
}
}
else if ((versionToExtract & 0xFF) >= 45 && (size == 4294967295u || compressedSize == 4294967295u))
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
if (zipExtraData.Find(10))
{
if (zipExtraData.ValueLength < 4)
{
throw new ZipException("NTFS Extra data invalid");
}
zipExtraData.ReadInt();
while (zipExtraData.UnreadCount >= 4)
{
int num = zipExtraData.ReadShort();
int num2 = zipExtraData.ReadShort();
if (num == 1)
{
if (num2 >= 24)
{
long num3 = zipExtraData.ReadLong();
zipExtraData.ReadLong();
zipExtraData.ReadLong();
DateTime = global::System.DateTime.FromFileTime(num3);
}
break;
}
zipExtraData.Skip(num2);
}
}
else if (zipExtraData.Find(21589))
{
int valueLength = zipExtraData.ValueLength;
int num4 = zipExtraData.ReadByte();
if (((uint)num4 & (true ? 1u : 0u)) != 0 && valueLength >= 5)
{
int num5 = zipExtraData.ReadInt();
DateTime = (new global::System.DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() + new TimeSpan(0, 0, 0, num5, 0)).ToLocalTime();
}
}
if (method == CompressionMethod.WinZipAES)
{
ProcessAESExtraData(zipExtraData);
}
}
/// <summary>
/// Process extra data fields updating the entry based on the contents.
/// </summary>
/// <param name="localHeader">True if the extra data fields should be handled
/// for a local header, rather than for a central header.
/// </param>
internal void ProcessExtraData(bool localHeader)
{
var extraData = new ZipExtraData(this.extra);
if (extraData.Find(0x0001)) {
// Version required to extract is ignored here as some archivers dont set it correctly
// in theory it should be version 45 or higher
// The recorded size will change but remember that this is zip64.
forceZip64_ = true;
if (extraData.ValueLength < 4) {
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
// (localHeader ||) was deleted, because actually there is no specific difference with reading sizes between local header & central directory
// https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT
// ...
// 4.4 Explanation of fields
// ...
// 4.4.8 compressed size: (4 bytes)
// 4.4.9 uncompressed size: (4 bytes)
//
// The size of the file compressed (4.4.8) and uncompressed,
// (4.4.9) respectively. When a decryption header is present it
// will be placed in front of the file data and the value of the
// compressed file size will include the bytes of the decryption
// header. If bit 3 of the general purpose bit flag is set,
// these fields are set to zero in the local header and the
// correct values are put in the data descriptor and
// in the central directory. If an archive is in ZIP64 format
// and the value in this field is 0xFFFFFFFF, the size will be
// in the corresponding 8 byte ZIP64 extended information
// extra field. When encrypting the central directory, if the
// local header is not in ZIP64 format and general purpose bit
// flag 13 is set indicating masking, the value stored for the
// uncompressed size in the Local Header will be zero.
//
// Othewise there is problem with minizip implementation
if (size == uint.MaxValue) {
size = (ulong)extraData.ReadLong();
}
if (compressedSize == uint.MaxValue) {
compressedSize = (ulong)extraData.ReadLong();
}
if (!localHeader && (offset == uint.MaxValue)) {
offset = extraData.ReadLong();
}
// Disk number on which file starts is ignored
} else {
if (
((versionToExtract & 0xff) >= ZipConstants.VersionZip64) &&
((size == uint.MaxValue) || (compressedSize == uint.MaxValue))
) {
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
DateTime = GetDateTime(extraData);
if (method == CompressionMethod.WinZipAES) {
ProcessAESExtraData(extraData);
}
}
private void WriteLocalHeader(ZipEntry entry, EntryPatchData patchData)
{
CompressionMethod compressionMethod = entry.CompressionMethod;
bool flag = true;
bool flag2 = false;
this.WriteLEInt(67324752);
this.WriteLEShort(entry.Version);
this.WriteLEShort(entry.Flags);
this.WriteLEShort((int)((byte)compressionMethod));
this.WriteLEInt((int)entry.DosTime);
if (flag)
{
this.WriteLEInt((int)entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
this.WriteLEInt(-1);
this.WriteLEInt(-1);
}
else
{
this.WriteLEInt((!entry.IsCrypted) ? ((int)entry.CompressedSize) : ((int)entry.CompressedSize + 12));
this.WriteLEInt((int)entry.Size);
}
}
else
{
if (patchData != null)
{
patchData.CrcPatchOffset = this.stream_.Position;
}
this.WriteLEInt(0);
if (patchData != null)
{
patchData.SizePatchOffset = this.stream_.Position;
}
if (entry.LocalHeaderRequiresZip64 && flag2)
{
this.WriteLEInt(-1);
this.WriteLEInt(-1);
}
else
{
this.WriteLEInt(0);
this.WriteLEInt(0);
}
}
byte[] array = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (array.Length > 65535)
{
throw new Exception("Entry name too long.");
}
ZipExtraData zipExtraData = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64 && (flag || flag2))
{
zipExtraData.StartNewEntry();
if (flag)
{
zipExtraData.AddLeLong(entry.Size);
zipExtraData.AddLeLong(entry.CompressedSize);
}
else
{
zipExtraData.AddLeLong(-1L);
zipExtraData.AddLeLong(-1L);
}
zipExtraData.AddNewEntry(1);
if (!zipExtraData.Find(1))
{
throw new Exception("Internal error cant find extra data");
}
if (patchData != null)
{
patchData.SizePatchOffset = (long)zipExtraData.CurrentReadIndex;
}
}
else
{
zipExtraData.Delete(1);
}
byte[] entryData = zipExtraData.GetEntryData();
this.WriteLEShort(array.Length);
this.WriteLEShort(entryData.Length);
if (array.Length > 0)
{
this.stream_.Write(array, 0, array.Length);
}
if (entry.LocalHeaderRequiresZip64 && flag2)
{
patchData.SizePatchOffset += this.stream_.Position;
}
if (entryData.Length > 0)
{
this.stream_.Write(entryData, 0, entryData.Length);
}
}
public void ReadOverrunInt()
{
var zed = new ZipExtraData(new byte[] { 1, 0, 0, 0 });
Assert.AreEqual(4, zed.Length, "Length should be 4");
Assert.IsTrue(zed.Find(1), "Should find tag 1");
// Empty Tag
bool exceptionCaught = false;
try {
zed.ReadInt();
} catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
// three bytes
zed = new ZipExtraData(new byte[] { 1, 0, 3, 0, 1, 2, 3 });
Assert.IsTrue(zed.Find(1), "Should find tag 1");
exceptionCaught = false;
try {
zed.ReadInt();
} catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
zed = new ZipExtraData(new byte[] { 1, 0, 7, 0, 1, 2, 3, 4, 5, 6, 7 });
Assert.IsTrue(zed.Find(1), "Should find tag 1");
zed.ReadInt();
exceptionCaught = false;
try {
zed.ReadInt();
} catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
}
/// <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;
}
}
void WriteLocalEntryHeader(ZipUpdate update)
{
ZipEntry entry = update.OutEntry;
entry.Offset = baseStream_.Position;
if (update.Command != UpdateCommand.Copy) {
if (entry.CompressionMethod == CompressionMethod.Deflated) {
if (entry.Size == 0) {
entry.CompressedSize = entry.Size;
entry.Crc = 0;
entry.CompressionMethod = CompressionMethod.Stored;
}
}
else if (entry.CompressionMethod == CompressionMethod.Stored) {
entry.Flags &= ~(int)GeneralBitFlags.Descriptor;
}
if (HaveKeys) {
entry.IsCrypted = true;
if (entry.Crc < 0) {
entry.Flags |= (int)GeneralBitFlags.Descriptor;
}
}
else {
entry.IsCrypted = false;
}
switch (useZip64_) {
case UseZip64.Dynamic:
if (entry.Size < 0) {
entry.ForceZip64();
}
break;
case UseZip64.On:
entry.ForceZip64();
break;
case UseZip64.Off:
break;
}
}
WriteLEInt(ZipConstants.LocalHeaderSignature);
WriteLEShort(entry.Version);
WriteLEShort(entry.Flags);
WriteLEShort((byte)entry.CompressionMethod);
WriteLEInt(( int )entry.DosTime);
if ( !entry.HasCrc ) {
update.CrcPatchOffset = baseStream_.Position;
WriteLEInt(( int )0);
}
else {
WriteLEInt(unchecked(( int )entry.Crc));
}
if (entry.LocalHeaderRequiresZip64) {
WriteLEInt(-1);
WriteLEInt(-1);
}
else {
if ( (entry.CompressedSize < 0) || (entry.Size < 0) ) {
update.SizePatchOffset = baseStream_.Position;
}
WriteLEInt(( int )entry.CompressedSize);
WriteLEInt(( int )entry.Size);
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if ( name.Length > 0xFFFF ) {
throw new ZipException("Entry name too long.");
}
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if ( entry.LocalHeaderRequiresZip64 ) {
ed.StartNewEntry();
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
ed.AddNewEntry(1);
}
else {
ed.Delete(1);
}
entry.ExtraData = ed.GetEntryData();
WriteLEShort(name.Length);
WriteLEShort(entry.ExtraData.Length);
if ( name.Length > 0 ) {
baseStream_.Write(name, 0, name.Length);
}
if ( entry.LocalHeaderRequiresZip64 ) {
if ( !ed.Find(1) ) {
throw new ZipException("Internal error cannot find extra data");
}
update.SizePatchOffset = baseStream_.Position + ed.CurrentReadIndex;
}
if ( entry.ExtraData.Length > 0 ) {
baseStream_.Write(entry.ExtraData, 0, entry.ExtraData.Length);
}
}
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;
}
}
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData extraData = new ZipExtraData(this.extra);
if ( extraData.Find(0x0001) ) {
if ( (versionToExtract & 0xff) < ZipConstants.VersionZip64 ) {
throw new ZipException("Zip64 Extended information found but version is not valid");
}
forceZip64_ = true;
if ( extraData.ValueLength < 4 ) {
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if ( localHeader || (size == uint.MaxValue) ) {
size = (ulong)extraData.ReadLong();
}
if ( localHeader || (compressedSize == uint.MaxValue) ) {
compressedSize = (ulong)extraData.ReadLong();
}
if ( !localHeader && (offset == uint.MaxValue) ) {
offset = extraData.ReadLong();
}
}
else {
if (
((versionToExtract & 0xff) >= ZipConstants.VersionZip64) &&
((size == uint.MaxValue) || (compressedSize == uint.MaxValue))
) {
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
if ( extraData.Find(10) ) {
if ( extraData.ValueLength < 8 ) {
throw new ZipException("NTFS Extra data invalid");
}
extraData.ReadInt();
while ( extraData.UnreadCount >= 4 ) {
int ntfsTag = extraData.ReadShort();
int ntfsLength = extraData.ReadShort();
if ( ntfsTag == 1 ) {
if ( ntfsLength >= 24 ) {
long lastModification = extraData.ReadLong();
long lastAccess = extraData.ReadLong();
long createTime = extraData.ReadLong();
DateTime = System.DateTime.FromFileTime(lastModification);
}
break;
}
else {
extraData.Skip(ntfsLength);
}
}
}
else if ( extraData.Find(0x5455) ) {
int length = extraData.ValueLength;
int flags = extraData.ReadByte();
if ( ((flags & 1) != 0) && (length >= 5) ) {
int iTime = extraData.ReadInt();
DateTime = (new System.DateTime ( 1970, 1, 1, 0, 0, 0 ).ToUniversalTime() +
new TimeSpan ( 0, 0, 0, iTime, 0 )).ToLocalTime();
}
}
}
public void PutNextEntry(ZipEntry entry)
{
//IL_0008: Unknown result type (might be due to invalid IL or missing references)
//IL_001b: Unknown result type (might be due to invalid IL or missing references)
if (entry == null)
{
throw new ArgumentNullException("entry");
}
if (entries == null)
{
throw new InvalidOperationException("ZipOutputStream was finished");
}
if (curEntry != null)
{
CloseEntry();
}
if (entries.get_Count() == 2147483647)
{
throw new ZipException("Too many entries for Zip file");
}
CompressionMethod compressionMethod = entry.CompressionMethod;
int level = defaultCompressionLevel;
entry.Flags &= 2048;
patchEntryHeader = false;
bool flag;
if (entry.Size == 0)
{
entry.CompressedSize = entry.Size;
entry.Crc = 0L;
compressionMethod = CompressionMethod.Stored;
flag = true;
}
else
{
flag = entry.Size >= 0 && entry.HasCrc;
if (compressionMethod == CompressionMethod.Stored)
{
if (!flag)
{
if (!base.CanPatchEntries)
{
compressionMethod = CompressionMethod.Deflated;
level = 0;
}
}
else
{
entry.CompressedSize = entry.Size;
flag = entry.HasCrc;
}
}
}
if (!flag)
{
if (!base.CanPatchEntries)
{
entry.Flags |= 8;
}
else
{
patchEntryHeader = true;
}
}
if (base.Password != null)
{
entry.IsCrypted = true;
if (entry.Crc < 0)
{
entry.Flags |= 8;
}
}
entry.Offset = offset;
entry.CompressionMethod = compressionMethod;
curMethod = compressionMethod;
sizePatchPos = -1L;
if (useZip64_ == UseZip64.On || (entry.Size < 0 && useZip64_ == UseZip64.Dynamic))
{
entry.ForceZip64();
}
WriteLeInt(67324752);
WriteLeShort(entry.Version);
WriteLeShort(entry.Flags);
WriteLeShort((byte)entry.CompressionMethodForHeader);
WriteLeInt((int)entry.DosTime);
if (flag)
{
WriteLeInt((int)entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
WriteLeInt(-1);
WriteLeInt(-1);
}
else
{
WriteLeInt((int)(entry.IsCrypted ? ((int)entry.CompressedSize + 12) : entry.CompressedSize));
WriteLeInt((int)entry.Size);
}
}
else
{
if (patchEntryHeader)
{
crcPatchPos = baseOutputStream_.get_Position();
}
WriteLeInt(0);
if (patchEntryHeader)
{
sizePatchPos = baseOutputStream_.get_Position();
}
if (entry.LocalHeaderRequiresZip64 || patchEntryHeader)
{
WriteLeInt(-1);
WriteLeInt(-1);
}
else
{
WriteLeInt(0);
WriteLeInt(0);
}
}
byte[] array = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (array.Length > 65535)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData zipExtraData = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64)
{
zipExtraData.StartNewEntry();
if (flag)
{
zipExtraData.AddLeLong(entry.Size);
zipExtraData.AddLeLong(entry.CompressedSize);
}
else
{
zipExtraData.AddLeLong(-1L);
zipExtraData.AddLeLong(-1L);
}
zipExtraData.AddNewEntry(1);
if (!zipExtraData.Find(1))
{
throw new ZipException("Internal error cant find extra data");
}
if (patchEntryHeader)
{
sizePatchPos = zipExtraData.CurrentReadIndex;
}
}
else
{
zipExtraData.Delete(1);
}
byte[] entryData = zipExtraData.GetEntryData();
WriteLeShort(array.Length);
WriteLeShort(entryData.Length);
if (array.Length > 0)
{
baseOutputStream_.Write(array, 0, array.Length);
}
if (entry.LocalHeaderRequiresZip64 && patchEntryHeader)
{
sizePatchPos += baseOutputStream_.get_Position();
}
if (entryData.Length > 0)
{
baseOutputStream_.Write(entryData, 0, entryData.Length);
}
offset += 30 + array.Length + entryData.Length;
if (entry.AESKeySize > 0)
{
offset += entry.AESOverheadSize;
}
curEntry = entry;
crc.Reset();
if (compressionMethod == CompressionMethod.Deflated)
{
deflater_.Reset();
deflater_.SetLevel(level);
}
size = 0L;
if (entry.IsCrypted)
{
if (entry.Crc < 0)
{
WriteEncryptionHeader(entry.DosTime << 16);
}
else
{
WriteEncryptionHeader(entry.Crc);
}
}
}
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData extraData = new ZipExtraData(this.extra);
if (extraData.Find(1))
{
this.forceZip64_ = true;
if (extraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (localHeader || (this.size == 0xffffffffL))
{
this.size = (ulong) extraData.ReadLong();
}
if (localHeader || (this.compressedSize == 0xffffffffL))
{
this.compressedSize = (ulong) extraData.ReadLong();
}
if (!localHeader && (this.offset == 0xffffffffL))
{
this.offset = extraData.ReadLong();
}
}
else if (((this.versionToExtract & 0xff) >= 0x2d) && ((this.size == 0xffffffffL) || (this.compressedSize == 0xffffffffL)))
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
if (extraData.Find(10))
{
if (extraData.ValueLength < 4)
{
throw new ZipException("NTFS Extra data invalid");
}
extraData.ReadInt();
while (extraData.UnreadCount >= 4)
{
int num = extraData.ReadShort();
int amount = extraData.ReadShort();
if (num == 1)
{
if (amount >= 0x18)
{
long fileTime = extraData.ReadLong();
extraData.ReadLong();
extraData.ReadLong();
this.DateTime = System.DateTime.FromFileTime(fileTime);
}
break;
}
extraData.Skip(amount);
}
}
else if (extraData.Find(0x5455))
{
int valueLength = extraData.ValueLength;
if (((extraData.ReadByte() & 1) != 0) && (valueLength >= 5))
{
int seconds = extraData.ReadInt();
System.DateTime time = new System.DateTime(0x7b2, 1, 1, 0, 0, 0);
this.DateTime = (time.ToUniversalTime() + new TimeSpan(0, 0, 0, seconds, 0)).ToLocalTime();
}
}
if (this.method == ICSharpCode.SharpZipLib.Zip.CompressionMethod.WinZipAES)
{
this.ProcessAESExtraData(extraData);
}
}
void WriteLocalEntryHeader(ZipUpdate update)
{
ZipEntry entry = update.OutEntry;
// TODO: Local offset will require adjusting for multi-disk zip files.
entry.Offset = baseStream_.Position;
// TODO: Need to clear any entry flags that dont make sense or throw an exception here.
if (update.Command != UpdateCommand.Copy) {
if (entry.CompressionMethod == CompressionMethod.Deflated) {
if (entry.Size == 0) {
// No need to compress - no data.
entry.CompressedSize = entry.Size;
entry.Crc = 0;
entry.CompressionMethod = CompressionMethod.Stored;
}
}
else if (entry.CompressionMethod == CompressionMethod.Stored) {
entry.Flags &= ~(int)GeneralBitFlags.Descriptor;
}
if (HaveKeys) {
entry.IsCrypted = true;
if (entry.Crc < 0) {
entry.Flags |= (int)GeneralBitFlags.Descriptor;
}
}
else {
entry.IsCrypted = false;
}
switch (useZip64_) {
case UseZip64.Dynamic:
if (entry.Size < 0) {
entry.ForceZip64();
}
break;
case UseZip64.On:
entry.ForceZip64();
break;
case UseZip64.Off:
// Do nothing. The entry itself may be using Zip64 independantly.
break;
}
}
// Write the local file header
WriteLEInt(ZipConstants.LocalHeaderSignature);
WriteLEShort(entry.Version);
WriteLEShort(entry.Flags);
WriteLEShort((byte)entry.CompressionMethod);
WriteLEInt(( int )entry.DosTime);
if ( !entry.HasCrc ) {
// Note patch address for updating CRC later.
update.CrcPatchOffset = baseStream_.Position;
WriteLEInt(( int )0);
}
else {
WriteLEInt(unchecked(( int )entry.Crc));
}
if (entry.LocalHeaderRequiresZip64) {
WriteLEInt(-1);
WriteLEInt(-1);
}
else {
if ( (entry.CompressedSize < 0) || (entry.Size < 0) ) {
update.SizePatchOffset = baseStream_.Position;
}
WriteLEInt(( int )entry.CompressedSize);
WriteLEInt(( int )entry.Size);
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if ( name.Length > 0xFFFF ) {
throw new ZipException("Entry name too long.");
}
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if ( entry.LocalHeaderRequiresZip64 ) {
ed.StartNewEntry();
// Local entry header always includes size and compressed size.
// NOTE the order of these fields is reversed when compared to the normal headers!
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
ed.AddNewEntry(1);
}
else {
ed.Delete(1);
}
entry.ExtraData = ed.GetEntryData();
WriteLEShort(name.Length);
WriteLEShort(entry.ExtraData.Length);
if ( name.Length > 0 ) {
baseStream_.Write(name, 0, name.Length);
}
if ( entry.LocalHeaderRequiresZip64 ) {
if ( !ed.Find(1) ) {
throw new ZipException("Internal error cannot find extra data");
}
update.SizePatchOffset = baseStream_.Position + ed.CurrentReadIndex;
}
if ( entry.ExtraData.Length > 0 ) {
baseStream_.Write(entry.ExtraData, 0, entry.ExtraData.Length);
}
}
public void PutNextEntry(ZipEntry entry)
{
if ( entry == null ) {
throw new ArgumentNullException("entry");
}
if (entries == null) {
throw new InvalidOperationException("ZipOutputStream was finished");
}
if (curEntry != null) {
CloseEntry();
}
if (entries.Count == int.MaxValue) {
throw new ZipException("Too many entries for Zip file");
}
CompressionMethod method = entry.CompressionMethod;
int compressionLevel = defaultCompressionLevel;
entry.Flags &= (int)GeneralBitFlags.UnicodeText;
patchEntryHeader = false;
bool headerInfoAvailable;
if (entry.Size == 0)
{
entry.CompressedSize = entry.Size;
entry.Crc = 0;
method = CompressionMethod.Stored;
headerInfoAvailable = true;
}
else
{
headerInfoAvailable = (entry.Size >= 0) && entry.HasCrc;
if (method == CompressionMethod.Stored)
{
if (!headerInfoAvailable)
{
if (!CanPatchEntries)
{
method = CompressionMethod.Deflated;
compressionLevel = 0;
}
}
else
{
entry.CompressedSize = entry.Size;
headerInfoAvailable = entry.HasCrc;
}
}
}
if (headerInfoAvailable == false) {
if (CanPatchEntries == false) {
entry.Flags |= 8;
} else {
patchEntryHeader = true;
}
}
if (Password != null) {
entry.IsCrypted = true;
if (entry.Crc < 0) {
entry.Flags |= 8;
}
}
entry.Offset = offset;
entry.CompressionMethod = (CompressionMethod)method;
curMethod = method;
sizePatchPos = -1;
if ( (useZip64_ == UseZip64.On) || ((entry.Size < 0) && (useZip64_ == UseZip64.Dynamic)) ) {
entry.ForceZip64();
}
WriteLeInt(ZipConstants.LocalHeaderSignature);
WriteLeShort(entry.Version);
WriteLeShort(entry.Flags);
WriteLeShort((byte)method);
WriteLeInt((int)entry.DosTime);
if (headerInfoAvailable == true) {
WriteLeInt((int)entry.Crc);
if ( entry.LocalHeaderRequiresZip64 ) {
WriteLeInt(-1);
WriteLeInt(-1);
}
else {
WriteLeInt(entry.IsCrypted ? (int)entry.CompressedSize + ZipConstants.CryptoHeaderSize : (int)entry.CompressedSize);
WriteLeInt((int)entry.Size);
}
} else {
if (patchEntryHeader == true) {
crcPatchPos = baseOutputStream_.Position;
}
WriteLeInt(0);
if ( patchEntryHeader ) {
sizePatchPos = baseOutputStream_.Position;
}
if ( entry.LocalHeaderRequiresZip64 || patchEntryHeader ) {
WriteLeInt(-1);
WriteLeInt(-1);
}
else {
WriteLeInt(0);
WriteLeInt(0);
}
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (name.Length > 0xFFFF) {
throw new ZipException("Entry name too long.");
}
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64) {
ed.StartNewEntry();
if (headerInfoAvailable) {
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
}
else {
ed.AddLeLong(-1);
ed.AddLeLong(-1);
}
ed.AddNewEntry(1);
if ( !ed.Find(1) ) {
throw new ZipException("Internal error cant find extra data");
}
if ( patchEntryHeader ) {
sizePatchPos = ed.CurrentReadIndex;
}
}
else {
ed.Delete(1);
}
byte[] extra = ed.GetEntryData();
WriteLeShort(name.Length);
WriteLeShort(extra.Length);
if ( name.Length > 0 ) {
baseOutputStream_.Write(name, 0, name.Length);
}
if ( entry.LocalHeaderRequiresZip64 && patchEntryHeader ) {
sizePatchPos += baseOutputStream_.Position;
}
if ( extra.Length > 0 ) {
baseOutputStream_.Write(extra, 0, extra.Length);
}
offset += ZipConstants.LocalHeaderBaseSize + name.Length + extra.Length;
curEntry = entry;
crc.Reset();
if (method == CompressionMethod.Deflated) {
deflater_.Reset();
deflater_.SetLevel(compressionLevel);
}
size = 0;
if (entry.IsCrypted == true) {
if (entry.Crc < 0) {
WriteEncryptionHeader(entry.DosTime << 16);
} else {
WriteEncryptionHeader(entry.Crc);
}
}
}
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);
}
}
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData extraData = new ZipExtraData(this.extra);
if (extraData.Find(0x0001))
{
if ((versionToExtract & 0xff) < ZipConstants.VersionZip64)
{
throw new ZipException("Zip64 Extended information found but version is not valid");
}
forceZip64_ = true;
if (extraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (localHeader || (size == uint.MaxValue))
{
size = (ulong)extraData.ReadLong();
}
if (localHeader || (compressedSize == uint.MaxValue))
{
compressedSize = (ulong)extraData.ReadLong();
}
if (!localHeader && (offset == uint.MaxValue))
{
offset = extraData.ReadLong();
}
}
else
{
if (
((versionToExtract & 0xff) >= ZipConstants.VersionZip64) &&
((size == uint.MaxValue) || (compressedSize == uint.MaxValue))
)
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
if (extraData.Find(10))
{
if (extraData.ValueLength < 8)
{
throw new ZipException("NTFS Extra data invalid");
}
extraData.ReadInt();
while (extraData.UnreadCount >= 4)
{
int ntfsTag = extraData.ReadShort();
int ntfsLength = extraData.ReadShort();
if (ntfsTag == 1)
{
if (ntfsLength >= 24)
{
long lastModification = extraData.ReadLong();
long lastAccess = extraData.ReadLong();
long createTime = extraData.ReadLong();
DateTime = System.DateTime.FromFileTime(lastModification);
}
break;
}
else
{
extraData.Skip(ntfsLength);
}
}
}
else if (extraData.Find(0x5455))
{
int length = extraData.ValueLength;
int flags = extraData.ReadByte();
if (((flags & 1) != 0) && (length >= 5))
{
int iTime = extraData.ReadInt();
DateTime = (new System.DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
}
}
}
/// <summary>
/// Process extra data fields updating the entry based on the contents.
/// </summary>
/// <param name="localHeader">True if the extra data fields should be handled
/// for a local header, rather than for a central header.
/// </param>
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData extraData = new ZipExtraData(this.extra);
if ( extraData.Find(0x0001) ) {
if ( (versionToExtract & 0xff) < ZipConstants.VersionZip64 ) {
throw new ZipException("Zip64 Extended information found but version is not valid");
}
// The recorded size will change but remember that this is zip64.
forceZip64_ = true;
if ( extraData.ValueLength < 4 ) {
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if ( localHeader || (size == uint.MaxValue) ) {
size = (ulong)extraData.ReadLong();
}
if ( localHeader || (compressedSize == uint.MaxValue) ) {
compressedSize = (ulong)extraData.ReadLong();
}
}
else {
if (
((versionToExtract & 0xff) >= ZipConstants.VersionZip64) &&
( (size == uint.MaxValue) ||
(compressedSize == uint.MaxValue) )) {
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
/* TODO: Testing for handling of windows extra data
if ( extraData.Find(10) ) {
// No room for any tags.
if ( extraData.ValueLength < 8 ) {
throw new ZipException("NTFS Extra data invalid");
}
extraData.ReadInt(); // Reserved
while ( extraData.UnreadCount >= 4 ) {
int ntfsTag = extraData.ReadShort();
int ntfsLength = extraData.ReadShort();
if ( ntfsTag == 1 ) {
if ( ntfsLength >= 24 ) {
long lastModification = extraData.ReadLong();
long lastAccess = extraData.ReadLong();
long createTime = extraData.ReadLong();
DateTime = System.DateTime.FromFileTime(lastModification);
}
break;
}
else {
// An unknown NTFS tag so simply skip it.
extraData.Skip(ntfsLength);
}
}
}
else
*/
if ( extraData.Find(0x5455) ) {
int length = extraData.ValueLength;
int flags = extraData.ReadByte();
// Can include other times but these are ignored. Length of data should
// actually be 1 + 4 * no of bits in flags.
if ( ((flags & 1) != 0) && (length >= 5) ) {
int iTime = extraData.ReadInt();
DateTime = (new System.DateTime ( 1970, 1, 1, 0, 0, 0 ).ToUniversalTime() +
new TimeSpan ( 0, 0, 0, iTime, 0 )).ToLocalTime();
}
}
}
public void PutNextEntry(ZipEntry entry)
{
if (entry == null)
{
throw new ArgumentNullException("entry");
}
if (entries == null)
{
throw new InvalidOperationException("ZipOutputStream was finished");
}
if (curEntry != null)
{
CloseEntry();
}
if (entries.Count == int.MaxValue)
{
throw new ZipException("Too many entries for Zip file");
}
CompressionMethod method = entry.CompressionMethod;
int compressionLevel = defaultCompressionLevel;
entry.Flags &= (int)GeneralBitFlags.UnicodeText;
patchEntryHeader = false;
bool headerInfoAvailable;
if (entry.Size == 0)
{
entry.CompressedSize = entry.Size;
entry.Crc = 0;
method = CompressionMethod.Stored;
headerInfoAvailable = true;
}
else
{
headerInfoAvailable = (entry.Size >= 0) && entry.HasCrc;
if (method == CompressionMethod.Stored)
{
if (!headerInfoAvailable)
{
if (!CanPatchEntries)
{
method = CompressionMethod.Deflated;
compressionLevel = 0;
}
}
else
{
entry.CompressedSize = entry.Size;
headerInfoAvailable = entry.HasCrc;
}
}
}
if (headerInfoAvailable == false)
{
if (CanPatchEntries == false)
{
entry.Flags |= 8;
}
else
{
patchEntryHeader = true;
}
}
if (Password != null)
{
entry.IsCrypted = true;
if (entry.Crc < 0)
{
entry.Flags |= 8;
}
}
entry.Offset = offset;
entry.CompressionMethod = (CompressionMethod)method;
curMethod = method;
sizePatchPos = -1;
if ((useZip64_ == UseZip64.On) || ((entry.Size < 0) && (useZip64_ == UseZip64.Dynamic)))
{
entry.ForceZip64();
}
WriteLeInt(ZipConstants.LocalHeaderSignature);
WriteLeShort(entry.Version);
WriteLeShort(entry.Flags);
WriteLeShort((byte)method);
WriteLeInt((int)entry.DosTime);
if (headerInfoAvailable == true)
{
WriteLeInt((int)entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
WriteLeInt(-1);
WriteLeInt(-1);
}
else
{
WriteLeInt(entry.IsCrypted ? (int)entry.CompressedSize + ZipConstants.CryptoHeaderSize : (int)entry.CompressedSize);
WriteLeInt((int)entry.Size);
}
}
else
{
if (patchEntryHeader == true)
{
crcPatchPos = baseOutputStream_.Position;
}
WriteLeInt(0);
if (patchEntryHeader)
{
sizePatchPos = baseOutputStream_.Position;
}
if (entry.LocalHeaderRequiresZip64 || patchEntryHeader)
{
WriteLeInt(-1);
WriteLeInt(-1);
}
else
{
WriteLeInt(0);
WriteLeInt(0);
}
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (name.Length > 0xFFFF)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64)
{
ed.StartNewEntry();
if (headerInfoAvailable)
{
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
}
else
{
ed.AddLeLong(-1);
ed.AddLeLong(-1);
}
ed.AddNewEntry(1);
if (!ed.Find(1))
{
throw new ZipException("Internal error cant find extra data");
}
if (patchEntryHeader)
{
sizePatchPos = ed.CurrentReadIndex;
}
}
else
{
ed.Delete(1);
}
byte[] extra = ed.GetEntryData();
WriteLeShort(name.Length);
WriteLeShort(extra.Length);
if (name.Length > 0)
{
baseOutputStream_.Write(name, 0, name.Length);
}
if (entry.LocalHeaderRequiresZip64 && patchEntryHeader)
{
sizePatchPos += baseOutputStream_.Position;
}
if (extra.Length > 0)
{
baseOutputStream_.Write(extra, 0, extra.Length);
}
offset += ZipConstants.LocalHeaderBaseSize + name.Length + extra.Length;
curEntry = entry;
crc.Reset();
if (method == CompressionMethod.Deflated)
{
deflater_.Reset();
deflater_.SetLevel(compressionLevel);
}
size = 0;
if (entry.IsCrypted == true)
{
if (entry.Crc < 0)
{
WriteEncryptionHeader(entry.DosTime << 16);
}
else
{
WriteEncryptionHeader(entry.Crc);
}
}
}
public void ReadOverrunLong()
{
ZipExtraData zed = new ZipExtraData(new byte[] { 1, 0, 0, 0 });
Assert.AreEqual(4, zed.Length, "Length should be 4");
Assert.IsTrue(zed.Find(1), "Should find tag 1");
// Empty Tag
bool exceptionCaught = false;
try {
zed.ReadLong();
}
catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
// seven bytes
zed = new ZipExtraData(new byte[] { 1, 0, 7, 0, 1, 2, 3, 4, 5, 6, 7 });
Assert.IsTrue(zed.Find(1), "Should find tag 1");
exceptionCaught = false;
try {
zed.ReadLong();
}
catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
zed = new ZipExtraData(new byte[] { 1, 0, 15, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 });
Assert.IsTrue(zed.Find(1), "Should find tag 1");
zed.ReadLong();
exceptionCaught = false;
try {
zed.ReadLong();
}
catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
}
// Write the local file header
// TODO: ZipHelperStream.WriteLocalHeader is not yet used and needs checking for ZipFile and ZipOuptutStream usage
void WriteLocalHeader(ZipEntry entry, EntryPatchData patchData)
{
CompressionMethod method = entry.CompressionMethod;
bool headerInfoAvailable = true; // How to get this?
bool patchEntryHeader = false;
WriteLEInt(ZipConstants.LocalHeaderSignature);
WriteLEShort(entry.Version);
WriteLEShort(entry.Flags);
WriteLEShort((byte)method);
WriteLEInt((int)entry.DosTime);
if (headerInfoAvailable) {
WriteLEInt((int)entry.Crc);
if ( entry.LocalHeaderRequiresZip64 ) {
WriteLEInt(-1);
WriteLEInt(-1);
}
else {
WriteLEInt(entry.IsCrypted ? (int)entry.CompressedSize + ZipConstants.CryptoHeaderSize : (int)entry.CompressedSize);
WriteLEInt((int)entry.Size);
}
} else {
if (patchData != null) {
patchData.CrcPatchOffset = stream_.Position;
}
WriteLEInt(0); // Crc
if ( patchData != null ) {
patchData.SizePatchOffset = stream_.Position;
}
// For local header both sizes appear in Zip64 Extended Information
if ( entry.LocalHeaderRequiresZip64 && patchEntryHeader ) {
WriteLEInt(-1);
WriteLEInt(-1);
}
else {
WriteLEInt(0); // Compressed size
WriteLEInt(0); // Uncompressed size
}
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (name.Length > 0xFFFF) {
throw new ZipException("Entry name too long.");
}
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64 && (headerInfoAvailable || patchEntryHeader)) {
ed.StartNewEntry();
if (headerInfoAvailable) {
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
}
else {
ed.AddLeLong(-1);
ed.AddLeLong(-1);
}
ed.AddNewEntry(1);
if ( !ed.Find(1) ) {
throw new ZipException("Internal error cant find extra data");
}
if ( patchData != null ) {
patchData.SizePatchOffset = ed.CurrentReadIndex;
}
}
else {
ed.Delete(1);
}
byte[] extra = ed.GetEntryData();
WriteLEShort(name.Length);
WriteLEShort(extra.Length);
if ( name.Length > 0 ) {
stream_.Write(name, 0, name.Length);
}
if ( entry.LocalHeaderRequiresZip64 && patchEntryHeader ) {
patchData.SizePatchOffset += stream_.Position;
}
if ( extra.Length > 0 ) {
stream_.Write(extra, 0, extra.Length);
}
}
public void Skipping()
{
ZipExtraData zed = new ZipExtraData(new byte[] { 1, 0, 7, 0, 1, 2, 3, 4, 5, 6, 7 });
Assert.AreEqual(11, zed.Length, "Length should be 11");
Assert.IsTrue(zed.Find(1), "Should find tag 1");
Assert.AreEqual(7, zed.UnreadCount);
Assert.AreEqual(4, zed.CurrentReadIndex);
zed.ReadByte();
Assert.AreEqual(6, zed.UnreadCount);
Assert.AreEqual(5, zed.CurrentReadIndex);
zed.Skip(1);
Assert.AreEqual(5, zed.UnreadCount);
Assert.AreEqual(6, zed.CurrentReadIndex);
zed.Skip(-1);
Assert.AreEqual(6, zed.UnreadCount);
Assert.AreEqual(5, zed.CurrentReadIndex);
zed.Skip(6);
Assert.AreEqual(0, zed.UnreadCount);
Assert.AreEqual(11, zed.CurrentReadIndex);
bool exceptionCaught = false;
try {
zed.Skip(1);
}
catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Should fail to skip past end");
Assert.AreEqual(0, zed.UnreadCount);
Assert.AreEqual(11, zed.CurrentReadIndex);
zed.Skip(-7);
Assert.AreEqual(7, zed.UnreadCount);
Assert.AreEqual(4, zed.CurrentReadIndex);
exceptionCaught=false;
try
{
zed.Skip(-1);
}
catch (ZipException) {
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Should fail to skip before beginning");
}
/// <summary>
/// Process extra data fields updating the entry based on the contents.
/// </summary>
/// <param name="localHeader">True if the extra data fields should be handled
/// for a local header, rather than for a central header.
/// </param>
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData extraData = new ZipExtraData(this.extra);
if (extraData.Find(0x0001))
{
// Version required to extract is ignored here as some archivers dont set it correctly
// in theory it should be version 45 or higher
// The recorded size will change but remember that this is zip64.
forceZip64_ = true;
if (extraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (localHeader || (size == uint.MaxValue))
{
size = (ulong)extraData.ReadLong();
}
if (localHeader || (compressedSize == uint.MaxValue))
{
compressedSize = (ulong)extraData.ReadLong();
}
if (!localHeader && (offset == uint.MaxValue))
{
offset = extraData.ReadLong();
}
// Disk number on which file starts is ignored
}
else
{
if (
((versionToExtract & 0xff) >= ZipConstants.VersionZip64) &&
((size == uint.MaxValue) || (compressedSize == uint.MaxValue))
)
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
if (extraData.Find(10))
{
// No room for any tags.
if (extraData.ValueLength < 4)
{
throw new ZipException("NTFS Extra data invalid");
}
extraData.ReadInt(); // Reserved
while (extraData.UnreadCount >= 4)
{
int ntfsTag = extraData.ReadShort();
int ntfsLength = extraData.ReadShort();
if (ntfsTag == 1)
{
if (ntfsLength >= 24)
{
long lastModification = extraData.ReadLong();
long lastAccess = extraData.ReadLong();
long createTime = extraData.ReadLong();
DateTime = System.DateTime.FromFileTime(lastModification);
}
break;
}
else
{
// An unknown NTFS tag so simply skip it.
extraData.Skip(ntfsLength);
}
}
}
else if (extraData.Find(0x5455))
{
int length = extraData.ValueLength;
int flags = extraData.ReadByte();
// Can include other times but these are ignored. Length of data should
// actually be 1 + 4 * no of bits in flags.
if (((flags & 1) != 0) && (length >= 5))
{
int iTime = extraData.ReadInt();
DateTime = (new System.DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
}
}
if (method == CompressionMethod.WinZipAES)
{
ProcessAESExtraData(extraData);
}
}
private void WriteLocalHeader(ZipEntry entry, EntryPatchData patchData)
{
CompressionMethod compressionMethod = entry.CompressionMethod;
bool flag = true;
bool flag2 = false;
this.WriteLEInt(0x4034b50);
this.WriteLEShort(entry.Version);
this.WriteLEShort(entry.Flags);
this.WriteLEShort((byte)compressionMethod);
this.WriteLEInt((int)entry.DosTime);
if (flag)
{
this.WriteLEInt((int)entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
this.WriteLEInt(-1);
this.WriteLEInt(-1);
}
else
{
this.WriteLEInt(entry.IsCrypted ? (((int)entry.CompressedSize) + 12) : ((int)entry.CompressedSize));
this.WriteLEInt((int)entry.Size);
}
}
else
{
if (patchData != null)
{
patchData.CrcPatchOffset = this.stream_.Position;
}
this.WriteLEInt(0);
if (patchData != null)
{
patchData.SizePatchOffset = this.stream_.Position;
}
if (entry.LocalHeaderRequiresZip64 && flag2)
{
this.WriteLEInt(-1);
this.WriteLEInt(-1);
}
else
{
this.WriteLEInt(0);
this.WriteLEInt(0);
}
}
byte[] buffer = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (buffer.Length > 0xffff)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData data = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64 && (flag || flag2))
{
data.StartNewEntry();
if (flag)
{
data.AddLeLong(entry.Size);
data.AddLeLong(entry.CompressedSize);
}
else
{
data.AddLeLong(-1L);
data.AddLeLong(-1L);
}
data.AddNewEntry(1);
if (!data.Find(1))
{
throw new ZipException("Internal error cant find extra data");
}
if (patchData != null)
{
patchData.SizePatchOffset = data.CurrentReadIndex;
}
}
else
{
data.Delete(1);
}
byte[] entryData = data.GetEntryData();
this.WriteLEShort(buffer.Length);
this.WriteLEShort(entryData.Length);
if (buffer.Length > 0)
{
this.stream_.Write(buffer, 0, buffer.Length);
}
if (entry.LocalHeaderRequiresZip64 && flag2)
{
patchData.SizePatchOffset += this.stream_.Position;
}
if (entryData.Length > 0)
{
this.stream_.Write(entryData, 0, entryData.Length);
}
}
private void WriteLocalEntryHeader(ZipUpdate update)
{
ZipEntry outEntry = update.OutEntry;
outEntry.Offset = this.baseStream_.Position;
if (update.Command != UpdateCommand.Copy)
{
if (outEntry.CompressionMethod == CompressionMethod.Deflated)
{
if (outEntry.Size == 0L)
{
outEntry.CompressedSize = outEntry.Size;
outEntry.Crc = 0L;
outEntry.CompressionMethod = CompressionMethod.Stored;
}
}
else if (outEntry.CompressionMethod == CompressionMethod.Stored)
{
outEntry.Flags &= -9;
}
if (this.HaveKeys)
{
outEntry.IsCrypted = true;
if (outEntry.Crc < 0L)
{
outEntry.Flags |= 8;
}
}
else
{
outEntry.IsCrypted = false;
}
switch (this.useZip64_)
{
case ICSharpCode.SharpZipLib.Zip.UseZip64.On:
outEntry.ForceZip64();
break;
case ICSharpCode.SharpZipLib.Zip.UseZip64.Dynamic:
if (outEntry.Size < 0L)
{
outEntry.ForceZip64();
}
break;
}
}
this.WriteLEInt(0x4034b50);
this.WriteLEShort(outEntry.Version);
this.WriteLEShort(outEntry.Flags);
this.WriteLEShort((byte) outEntry.CompressionMethod);
this.WriteLEInt((int) outEntry.DosTime);
if (!outEntry.HasCrc)
{
update.CrcPatchOffset = this.baseStream_.Position;
this.WriteLEInt(0);
}
else
{
this.WriteLEInt((int) outEntry.Crc);
}
if (outEntry.LocalHeaderRequiresZip64)
{
this.WriteLEInt(-1);
this.WriteLEInt(-1);
}
else
{
if ((outEntry.CompressedSize < 0L) || (outEntry.Size < 0L))
{
update.SizePatchOffset = this.baseStream_.Position;
}
this.WriteLEInt((int) outEntry.CompressedSize);
this.WriteLEInt((int) outEntry.Size);
}
byte[] buffer = ZipConstants.ConvertToArray(outEntry.Flags, outEntry.Name);
if (buffer.Length > 0xffff)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData data = new ZipExtraData(outEntry.ExtraData);
if (outEntry.LocalHeaderRequiresZip64)
{
data.StartNewEntry();
data.AddLeLong(outEntry.Size);
data.AddLeLong(outEntry.CompressedSize);
data.AddNewEntry(1);
}
else
{
data.Delete(1);
}
outEntry.ExtraData = data.GetEntryData();
this.WriteLEShort(buffer.Length);
this.WriteLEShort(outEntry.ExtraData.Length);
if (buffer.Length > 0)
{
this.baseStream_.Write(buffer, 0, buffer.Length);
}
if (outEntry.LocalHeaderRequiresZip64)
{
if (!data.Find(1))
{
throw new ZipException("Internal error cannot find extra data");
}
update.SizePatchOffset = this.baseStream_.Position + data.CurrentReadIndex;
}
if (outEntry.ExtraData.Length > 0)
{
this.baseStream_.Write(outEntry.ExtraData, 0, outEntry.ExtraData.Length);
}
}
/// <summary>
/// Starts a new Zip entry. It automatically closes the previous
/// entry if present.
/// All entry elements bar name are optional, but must be correct if present.
/// If the compression method is stored and the output is not patchable
/// the compression for that entry is automatically changed to deflate level 0
/// </summary>
/// <param name="entry">
/// the entry.
/// </param>
/// <exception cref="System.ArgumentNullException">
/// if entry passed is null.
/// </exception>
/// <exception cref="System.IO.IOException">
/// if an I/O error occured.
/// </exception>
/// <exception cref="System.InvalidOperationException">
/// if stream was finished
/// </exception>
/// <exception cref="ZipException">
/// Too many entries in the Zip file<br/>
/// Entry name is too long<br/>
/// Finish has already been called<br/>
/// </exception>
public void PutNextEntry(ZipEntry entry)
{
if (entry == null)
{
throw new ArgumentNullException("entry");
}
if (entries == null)
{
throw new InvalidOperationException("ZipOutputStream was finished");
}
if (curEntry != null)
{
CloseEntry();
}
if (entries.Count == int.MaxValue)
{
throw new ZipException("Too many entries for Zip file");
}
CompressionMethod method = entry.CompressionMethod;
int compressionLevel = defaultCompressionLevel;
// Clear flags that the library manages internally
entry.Flags &= (int) GeneralBitFlags.UnicodeText;
patchEntryHeader = false;
bool headerInfoAvailable;
// No need to compress - definitely no data.
if (entry.Size == 0)
{
entry.CompressedSize = entry.Size;
entry.Crc = 0;
method = CompressionMethod.Stored;
headerInfoAvailable = true;
}
else
{
headerInfoAvailable = (entry.Size >= 0) && entry.HasCrc;
// Switch to deflation if storing isnt possible.
if (method == CompressionMethod.Stored)
{
if (!headerInfoAvailable)
{
if (!CanPatchEntries)
{
// Can't patch entries so storing is not possible.
method = CompressionMethod.Deflated;
compressionLevel = 0;
}
}
else // entry.size must be > 0
{
entry.CompressedSize = entry.Size;
headerInfoAvailable = entry.HasCrc;
}
}
}
if (headerInfoAvailable == false)
{
if (CanPatchEntries == false)
{
// Only way to record size and compressed size is to append a data descriptor
// after compressed data.
// Stored entries of this form have already been converted to deflating.
entry.Flags |= 8;
}
else
{
patchEntryHeader = true;
}
}
if (Password != null)
{
entry.IsCrypted = true;
if (entry.Crc < 0)
{
// Need to append a data descriptor as the crc isnt available for use
// with encryption, the date is used instead. Setting the flag
// indicates this to the decompressor.
entry.Flags |= 8;
}
}
entry.Offset = offset;
entry.CompressionMethod = method;
curMethod = method;
sizePatchPos = -1;
if ((useZip64_ == UseZip64.On) || ((entry.Size < 0) && (useZip64_ == UseZip64.Dynamic)))
{
entry.ForceZip64();
}
// Write the local file header
WriteLeInt(ZipConstants.LocalHeaderSignature);
WriteLeShort(entry.Version);
WriteLeShort(entry.Flags);
WriteLeShort((byte) entry.CompressionMethodForHeader);
WriteLeInt((int) entry.DosTime);
// TODO: Refactor header writing. Its done in several places.
if (headerInfoAvailable)
{
WriteLeInt((int) entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
WriteLeInt(-1);
WriteLeInt(-1);
}
else
{
WriteLeInt(entry.IsCrypted
? (int) entry.CompressedSize + ZipConstants.CryptoHeaderSize
: (int) entry.CompressedSize);
WriteLeInt((int) entry.Size);
}
}
else
{
if (patchEntryHeader)
{
crcPatchPos = baseOutputStream_.Position;
}
WriteLeInt(0); // Crc
if (patchEntryHeader)
{
sizePatchPos = baseOutputStream_.Position;
}
// For local header both sizes appear in Zip64 Extended Information
if (entry.LocalHeaderRequiresZip64 || patchEntryHeader)
{
WriteLeInt(-1);
WriteLeInt(-1);
}
else
{
WriteLeInt(0); // Compressed size
WriteLeInt(0); // Uncompressed size
}
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (name.Length > 0xFFFF)
{
throw new ZipException("Entry name too long.");
}
var ed = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64)
{
ed.StartNewEntry();
if (headerInfoAvailable)
{
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
}
else
{
ed.AddLeLong(-1);
ed.AddLeLong(-1);
}
ed.AddNewEntry(1);
if (!ed.Find(1))
{
throw new ZipException("Internal error cant find extra data");
}
if (patchEntryHeader)
{
sizePatchPos = ed.CurrentReadIndex;
}
}
else
{
ed.Delete(1);
}
#if !NET_1_1 && !NETCF_2_0
if (entry.AESKeySize > 0)
{
AddExtraDataAES(entry, ed);
}
#endif
byte[] extra = ed.GetEntryData();
WriteLeShort(name.Length);
WriteLeShort(extra.Length);
if (name.Length > 0)
{
baseOutputStream_.Write(name, 0, name.Length);
}
if (entry.LocalHeaderRequiresZip64 && patchEntryHeader)
{
sizePatchPos += baseOutputStream_.Position;
}
if (extra.Length > 0)
{
baseOutputStream_.Write(extra, 0, extra.Length);
}
offset += ZipConstants.LocalHeaderBaseSize + name.Length + extra.Length;
// Fix offsetOfCentraldir for AES
if (entry.AESKeySize > 0)
offset += entry.AESOverheadSize;
// Activate the entry.
curEntry = entry;
crc.Reset();
if (method == CompressionMethod.Deflated)
{
deflater_.Reset();
deflater_.SetLevel(compressionLevel);
}
size = 0;
if (entry.IsCrypted)
{
#if !NET_1_1 && !NETCF_2_0
if (entry.AESKeySize > 0)
{
WriteAESHeader(entry);
}
else
#endif
{
if (entry.Crc < 0)
{
// so testing Zip will says its ok
WriteEncryptionHeader(entry.DosTime << 16);
}
else
{
WriteEncryptionHeader(entry.Crc);
}
}
}
}
/// <summary>
/// Process extra data fields updating the entry based on the contents.
/// </summary>
/// <param name="localHeader">True if the extra data fields should be handled
/// for a local header, rather than for a central header.
/// </param>
internal void ProcessExtraData(bool localHeader)
{
var extraData = new ZipExtraData(extra);
if (extraData.Find(0x0001))
{
// Version required to extract is ignored here as some archivers dont set it correctly
// in theory it should be version 45 or higher
// The recorded size will change but remember that this is zip64.
forceZip64_ = true;
if (extraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (localHeader || (size == uint.MaxValue))
{
size = (ulong) extraData.ReadLong();
}
if (localHeader || (compressedSize == uint.MaxValue))
{
compressedSize = (ulong) extraData.ReadLong();
}
if (!localHeader && (offset == uint.MaxValue))
{
offset = extraData.ReadLong();
}
// Disk number on which file starts is ignored
}
else
{
if (
((versionToExtract & 0xff) >= ZipConstants.VersionZip64) &&
((size == uint.MaxValue) || (compressedSize == uint.MaxValue))
)
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
if (extraData.Find(10))
{
// No room for any tags.
if (extraData.ValueLength < 4)
{
throw new ZipException("NTFS Extra data invalid");
}
extraData.ReadInt(); // Reserved
while (extraData.UnreadCount >= 4)
{
int ntfsTag = extraData.ReadShort();
int ntfsLength = extraData.ReadShort();
if (ntfsTag == 1)
{
if (ntfsLength >= 24)
{
long lastModification = extraData.ReadLong();
long lastAccess = extraData.ReadLong();
long createTime = extraData.ReadLong();
DateTime = DateTime.FromFileTime(lastModification);
}
break;
}
else
{
// An unknown NTFS tag so simply skip it.
extraData.Skip(ntfsLength);
}
}
}
else if (extraData.Find(0x5455))
{
int length = extraData.ValueLength;
int flags = extraData.ReadByte();
// Can include other times but these are ignored. Length of data should
// actually be 1 + 4 * no of bits in flags.
if (((flags & 1) != 0) && (length >= 5))
{
int iTime = extraData.ReadInt();
DateTime = (new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
}
}
if (method == CompressionMethod.WinZipAES)
{
ProcessAESExtraData(extraData);
}
}
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData data = new ZipExtraData(this.extra);
if (data.Find(1))
{
if ((this.versionToExtract & 0xff) < 0x2d)
{
throw new ZipException("Zip64 Extended information found but version is not valid");
}
this.forceZip64_ = true;
if (data.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (localHeader || (this.size == 0xffffffffL))
{
this.size = (ulong)data.ReadLong();
}
if (localHeader || (this.compressedSize == 0xffffffffL))
{
this.compressedSize = (ulong)data.ReadLong();
}
if (!localHeader && (this.offset == 0xffffffffL))
{
this.offset = data.ReadLong();
}
}
else if (((this.versionToExtract & 0xff) >= 0x2d) && ((this.size == 0xffffffffL) || (this.compressedSize == 0xffffffffL)))
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
if (data.Find(10))
{
if (data.ValueLength < 8)
{
throw new ZipException("NTFS Extra data invalid");
}
data.ReadInt();
while (data.UnreadCount >= 4)
{
int num = data.ReadShort();
int amount = data.ReadShort();
if (num == 1)
{
if (amount >= 0x18)
{
long fileTime = data.ReadLong();
data.ReadLong();
data.ReadLong();
this.DateTime = System.DateTime.FromFileTime(fileTime);
return;
}
return;
}
data.Skip(amount);
}
}
else if (data.Find(0x5455))
{
int valueLength = data.ValueLength;
if (((data.ReadByte() & 1) != 0) && (valueLength >= 5))
{
int seconds = data.ReadInt();
System.DateTime time = new System.DateTime(0x7b2, 1, 1, 0, 0, 0);
this.DateTime = (time.ToUniversalTime() + new TimeSpan(0, 0, 0, seconds, 0)).ToLocalTime();
}
}
}
private void ProcessAESExtraData(ZipExtraData extraData)
{
if (!extraData.Find(0x9901))
{
throw new ZipException("AES Extra Data missing");
}
this.versionToExtract = 0x33;
this.Flags |= 0x40;
int valueLength = extraData.ValueLength;
if (valueLength < 7)
{
throw new ZipException("AES Extra Data Length " + valueLength + " invalid.");
}
int num2 = extraData.ReadShort();
extraData.ReadShort();
int num3 = extraData.ReadByte();
int num4 = extraData.ReadShort();
this._aesVer = num2;
this._aesEncryptionStrength = num3;
this.method = (ICSharpCode.SharpZipLib.Zip.CompressionMethod) num4;
}
/// <summary>
/// Process extra data fields updating the entry based on the contents.
/// </summary>
/// <param name="localHeader">True if the extra data fields should be handled
/// for a local header, rather than for a central header.
/// </param>
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData extraData = new ZipExtraData(this.extra);
if ( extraData.Find(0x0001) ) {
// Version required to extract is ignored here as some archivers dont set it correctly
// in theory it should be version 45 or higher
// The recorded size will change but remember that this is zip64.
forceZip64_ = true;
if ( extraData.ValueLength < 4 ) {
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if ( localHeader || (size == uint.MaxValue) ) {
size = (ulong)extraData.ReadLong();
}
if ( localHeader || (compressedSize == uint.MaxValue) ) {
compressedSize = (ulong)extraData.ReadLong();
}
if ( !localHeader && (offset == uint.MaxValue) ) {
offset = extraData.ReadLong();
}
// Disk number on which file starts is ignored
}
else {
if (
((versionToExtract & 0xff) >= ZipConstants.VersionZip64) &&
((size == uint.MaxValue) || (compressedSize == uint.MaxValue))
) {
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
dateTime = GetDateTime(extraData);
if (method == CompressionMethod.WinZipAES) {
ProcessAESExtraData(extraData);
}
}
private void WriteLocalHeader(ZipEntry entry, EntryPatchData patchData)
{
CompressionMethod compressionMethod = entry.CompressionMethod;
bool flag = true;
bool flag2 = false;
WriteLEInt(67324752);
WriteLEShort(entry.Version);
WriteLEShort(entry.Flags);
WriteLEShort((byte)compressionMethod);
WriteLEInt((int)entry.DosTime);
if (flag)
{
WriteLEInt((int)entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
WriteLEInt(-1);
WriteLEInt(-1);
}
else
{
WriteLEInt((int)(entry.IsCrypted ? ((int)entry.CompressedSize + 12) : entry.CompressedSize));
WriteLEInt((int)entry.Size);
}
}
else
{
if (patchData != null)
{
patchData.CrcPatchOffset = stream_.get_Position();
}
WriteLEInt(0);
if (patchData != null)
{
patchData.SizePatchOffset = stream_.get_Position();
}
if (entry.LocalHeaderRequiresZip64 && flag2)
{
WriteLEInt(-1);
WriteLEInt(-1);
}
else
{
WriteLEInt(0);
WriteLEInt(0);
}
}
byte[] array = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (array.Length > 65535)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData zipExtraData = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64 && (flag || flag2))
{
zipExtraData.StartNewEntry();
if (flag)
{
zipExtraData.AddLeLong(entry.Size);
zipExtraData.AddLeLong(entry.CompressedSize);
}
else
{
zipExtraData.AddLeLong(-1L);
zipExtraData.AddLeLong(-1L);
}
zipExtraData.AddNewEntry(1);
if (!zipExtraData.Find(1))
{
throw new ZipException("Internal error cant find extra data");
}
if (patchData != null)
{
patchData.SizePatchOffset = zipExtraData.CurrentReadIndex;
}
}
else
{
zipExtraData.Delete(1);
}
byte[] entryData = zipExtraData.GetEntryData();
WriteLEShort(array.Length);
WriteLEShort(entryData.Length);
if (array.Length > 0)
{
stream_.Write(array, 0, array.Length);
}
if (entry.LocalHeaderRequiresZip64 && flag2)
{
patchData.SizePatchOffset += stream_.get_Position();
}
if (entryData.Length > 0)
{
stream_.Write(entryData, 0, entryData.Length);
}
}
/// <summary>
/// Process extra data fields updating the entry based on the contents.
/// </summary>
/// <param name="localHeader">True if the extra data fields should be handled
/// for a local header, rather than for a central header.
/// </param>
internal void ProcessExtraData(bool localHeader)
{
var extraData = new ZipExtraData(this.extra);
if (extraData.Find(0x0001))
{
// Version required to extract is ignored here as some archivers dont set it correctly
// in theory it should be version 45 or higher
// The recorded size will change but remember that this is zip64.
forceZip64_ = true;
if (extraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
// (localHeader ||) was deleted, because actually there is no specific difference with reading sizes between local header & central directory
// https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT
// ...
// 4.4 Explanation of fields
// ...
// 4.4.8 compressed size: (4 bytes)
// 4.4.9 uncompressed size: (4 bytes)
//
// The size of the file compressed (4.4.8) and uncompressed,
// (4.4.9) respectively. When a decryption header is present it
// will be placed in front of the file data and the value of the
// compressed file size will include the bytes of the decryption
// header. If bit 3 of the general purpose bit flag is set,
// these fields are set to zero in the local header and the
// correct values are put in the data descriptor and
// in the central directory. If an archive is in ZIP64 format
// and the value in this field is 0xFFFFFFFF, the size will be
// in the corresponding 8 byte ZIP64 extended information
// extra field. When encrypting the central directory, if the
// local header is not in ZIP64 format and general purpose bit
// flag 13 is set indicating masking, the value stored for the
// uncompressed size in the Local Header will be zero.
//
// Othewise there is problem with minizip implementation
if (size == uint.MaxValue)
{
size = (ulong)extraData.ReadLong();
}
if (compressedSize == uint.MaxValue)
{
compressedSize = (ulong)extraData.ReadLong();
}
if (!localHeader && (offset == uint.MaxValue))
{
offset = extraData.ReadLong();
}
// Disk number on which file starts is ignored
}
else
{
if (
((versionToExtract & 0xff) >= ZipConstants.VersionZip64) &&
((size == uint.MaxValue) || (compressedSize == uint.MaxValue))
)
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
DateTime = GetDateTime(extraData);
if (method == CompressionMethod.WinZipAES)
{
ProcessAESExtraData(extraData);
}
}
public void PutNextEntry(ZipEntry entry)
{
bool hasCrc;
if (entry == null)
{
throw new ArgumentNullException("entry");
}
if (this.entries == null)
{
throw new InvalidOperationException("ZipOutputStream was finished");
}
if (this.curEntry != null)
{
this.CloseEntry();
}
if (this.entries.Count == 0x7fffffff)
{
throw new ZipException("Too many entries for Zip file");
}
CompressionMethod compressionMethod = entry.CompressionMethod;
int defaultCompressionLevel = this.defaultCompressionLevel;
entry.Flags &= 0x800;
this.patchEntryHeader = false;
if (entry.Size == 0L)
{
entry.CompressedSize = entry.Size;
entry.Crc = 0L;
compressionMethod = CompressionMethod.Stored;
hasCrc = true;
}
else
{
hasCrc = (entry.Size >= 0L) && entry.HasCrc;
if (compressionMethod == CompressionMethod.Stored)
{
if (!hasCrc)
{
if (!base.CanPatchEntries)
{
compressionMethod = CompressionMethod.Deflated;
defaultCompressionLevel = 0;
}
}
else
{
entry.CompressedSize = entry.Size;
hasCrc = entry.HasCrc;
}
}
}
if (!hasCrc)
{
if (!base.CanPatchEntries)
{
entry.Flags |= 8;
}
else
{
this.patchEntryHeader = true;
}
}
if (base.Password != null)
{
entry.IsCrypted = true;
if (entry.Crc < 0L)
{
entry.Flags |= 8;
}
}
entry.Offset = this.offset;
entry.CompressionMethod = compressionMethod;
this.curMethod = compressionMethod;
this.sizePatchPos = -1L;
if ((this.useZip64_ == ICSharpCode.SharpZipLib.Zip.UseZip64.On) || ((entry.Size < 0L) && (this.useZip64_ == ICSharpCode.SharpZipLib.Zip.UseZip64.Dynamic)))
{
entry.ForceZip64();
}
this.WriteLeInt(0x4034b50);
this.WriteLeShort(entry.Version);
this.WriteLeShort(entry.Flags);
this.WriteLeShort((byte)entry.CompressionMethodForHeader);
this.WriteLeInt((int)entry.DosTime);
if (hasCrc)
{
this.WriteLeInt((int)entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
this.WriteLeInt(-1);
this.WriteLeInt(-1);
}
else
{
this.WriteLeInt(entry.IsCrypted ? (((int)entry.CompressedSize) + 12) : ((int)entry.CompressedSize));
this.WriteLeInt((int)entry.Size);
}
}
else
{
if (this.patchEntryHeader)
{
this.crcPatchPos = base.baseOutputStream_.Position;
}
this.WriteLeInt(0);
if (this.patchEntryHeader)
{
this.sizePatchPos = base.baseOutputStream_.Position;
}
if (entry.LocalHeaderRequiresZip64 || this.patchEntryHeader)
{
this.WriteLeInt(-1);
this.WriteLeInt(-1);
}
else
{
this.WriteLeInt(0);
this.WriteLeInt(0);
}
}
byte[] buffer = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (buffer.Length > 0xffff)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData extraData = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64)
{
extraData.StartNewEntry();
if (hasCrc)
{
extraData.AddLeLong(entry.Size);
extraData.AddLeLong(entry.CompressedSize);
}
else
{
extraData.AddLeLong(-1L);
extraData.AddLeLong(-1L);
}
extraData.AddNewEntry(1);
if (!extraData.Find(1))
{
throw new ZipException("Internal error cant find extra data");
}
if (this.patchEntryHeader)
{
this.sizePatchPos = extraData.CurrentReadIndex;
}
}
else
{
extraData.Delete(1);
}
if (entry.AESKeySize > 0)
{
AddExtraDataAES(entry, extraData);
}
byte[] entryData = extraData.GetEntryData();
this.WriteLeShort(buffer.Length);
this.WriteLeShort(entryData.Length);
if (buffer.Length > 0)
{
base.baseOutputStream_.Write(buffer, 0, buffer.Length);
}
if (entry.LocalHeaderRequiresZip64 && this.patchEntryHeader)
{
this.sizePatchPos += base.baseOutputStream_.Position;
}
if (entryData.Length > 0)
{
base.baseOutputStream_.Write(entryData, 0, entryData.Length);
}
this.offset += (30 + buffer.Length) + entryData.Length;
if (entry.AESKeySize > 0)
{
this.offset += entry.AESOverheadSize;
}
this.curEntry = entry;
this.crc.Reset();
if (compressionMethod == CompressionMethod.Deflated)
{
base.deflater_.Reset();
base.deflater_.SetLevel(defaultCompressionLevel);
}
this.size = 0L;
if (entry.IsCrypted)
{
if (entry.AESKeySize > 0)
{
this.WriteAESHeader(entry);
}
else if (entry.Crc < 0L)
{
this.WriteEncryptionHeader(entry.DosTime << 0x10);
}
else
{
this.WriteEncryptionHeader(entry.Crc);
}
}
}
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData extraData = new ZipExtraData(this.extra);
if (!extraData.Find(1))
{
if (((this.versionToExtract & 0xff) >= 0x2d) && ((this.size == 0xffffffffUL) || (this.compressedSize == 0xffffffffUL)))
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
else
{
this.forceZip64_ = true;
if (extraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (localHeader || (this.size == 0xffffffffUL))
{
this.size = (ulong)extraData.ReadLong();
}
if (localHeader || (this.compressedSize == 0xffffffffUL))
{
this.compressedSize = (ulong)extraData.ReadLong();
}
if (!localHeader && (this.offset == 0xffffffffUL))
{
this.offset = extraData.ReadLong();
}
}
if (!extraData.Find(10))
{
if (extraData.Find(0x5455))
{
int valueLength = extraData.ValueLength;
if (((extraData.ReadByte() & 1) != 0) && (valueLength >= 5))
{
int seconds = extraData.ReadInt();
this.DateTime = (new System.DateTime(0x7b2, 1, 1, 0, 0, 0).ToUniversalTime() + new TimeSpan(0, 0, 0, seconds, 0)).ToLocalTime();
}
}
}
else
{
if (extraData.ValueLength < 4)
{
throw new ZipException("NTFS Extra data invalid");
}
extraData.ReadInt();
while (extraData.UnreadCount >= 4)
{
int amount = extraData.ReadShort();
if (extraData.ReadShort() == 1)
{
if (amount >= 0x18)
{
long fileTime = extraData.ReadLong();
extraData.ReadLong();
extraData.ReadLong();
this.DateTime = System.DateTime.FromFileTime(fileTime);
}
break;
}
extraData.Skip(amount);
}
}
if (this.method == ICSharpCode.SharpZipLib.Zip.CompressionMethod.WinZipAES)
{
this.ProcessAESExtraData(extraData);
}
}
public void ReadOverrunLong()
{
ZipExtraData zed = new ZipExtraData(new byte[] { 1, 0, 0, 0 });
Assert.AreEqual(4, zed.Length, "Length should be 4");
Assert.IsTrue(zed.Find(1), "Should find tag 1");
// Empty Tag
bool exceptionCaught = false;
try
{
zed.ReadLong();
}
catch (ZipException)
{
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
// seven bytes
zed = new ZipExtraData(new byte[] { 1, 0, 7, 0, 1, 2, 3, 4, 5, 6, 7 });
Assert.IsTrue(zed.Find(1), "Should find tag 1");
exceptionCaught = false;
try
{
zed.ReadLong();
}
catch (ZipException)
{
exceptionCaught = true;
}
Assert.IsTrue(exceptionCaught, "Expected EOS exception");
zed = new ZipExtraData(new byte[] { 1, 0, 15, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9F�5���5���5��5@�5��5��5��5�թ5���5���5�έ5��5���5@թ5��5P��5@Ԣ5 ��5���5 �5��5���5� �5P!�5Ѐ�5�F�5���5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5�ʮ5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5�'�5�έ5�w�5�o�5�h�5�N�5 �5�έ5PN�5@a�50;�5�߮5�M�50O�5�M�5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5@;�5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5Ph�5�έ5�w�5�o�5K�5��5���5��5�!�5F�5���5���5��5p�5��5��5�5�թ5���5`"�5�έ5��5���5PN�5@a�50;�5`�5 �5@թ5��5P��5@Ԣ5P�5��5 �5��5��5� �5P!�5Ѐ�5�F�5���5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5@;�5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5Ph�5�έ5�w�5�o�5@K�5p:�5���5��5�!�5F�5���5���5��5P=�5�>�5�>�5�?�5�թ5���5�F�5�έ5��5���5PN�5@a�50;�5@<�5<�5@թ5��5P��5@Ԣ50@�5�@�5 �5��5�C�5� �5P!�5Ѐ�5�F�5���5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5@;�5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5Ph�5�έ5�w�5�o�5pK�5@^�5���5��5 m�5Po�5���5���5��5 a�5pb�5�b�5�c�5�թ5���5�o�5�έ5��5���5PN�5@a�50;�5`�5�_�5@թ5��5P��5@Ԣ5d�5�d�5�f�5�h�5�f�5�j�5�l�5Ѐ�5�F�5���5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5�ʮ5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5�'�5�έ5�w�5�o�5�h�5�Q�5 �5�έ5PN�5@a�50;�5�߮5�P�5�P�5@Q�5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5@;�5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5Ph�5�έ5�w�5�o�5�K�5p��5@Ԣ5��5���5���5���5���5��5P��5���5Ћ�5���5�թ5���5���5�έ5��5���5PN�5@a�50;�5@��5��5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5�ʮ5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5�'�5�έ5�w�5�o�5 i�5pT�5 �5�έ5PN�5@a�50;�5�߮5PS�5�S�5�S�5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5@;�5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5Ph�5�έ5�w�5�o�5�K�5�5���5��5н�5P��5���5���5��5�5`��5���5���5�թ5���5���5�έ5��5���5@թ5��5P��5@Ԣ5�5���5��5P��5�5���59�5Ѐ�5�F�5���5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5�ʮ5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5�'�5�έ5�w�5�o�5L�5�5 �5�έ5PN�5@a�50;�5�6�ֺ5 ��5�ֺ5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5@;�5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5Ph�5�έ5�w�5�o�50L�50ߺ5���5��5��5�5���5���5��5�5`�5��5��5�թ5���5p�5�έ5��5���5@թ5��5P��5@Ԣ5��5��50�5p�5p�5��5��5Ѐ�5�F�5���5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5�ʮ5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5�'�5�έ5�w�5�o�5Pi�5PW�5 �5�έ5PN�5@a�50;�5�߮5�U�50V�5�V�5P��5@�5���5@z�5@z�5@z�5@z�5�x�5�x�5�~�5�p�5�~�5�w�5�x�50w�5�x�50w�5��5@Ԣ5@;�5�p�5@ �5�z�5Pv�5�z�5Pv�5@y�5���5�w�5�w�5Pv�5Pv�5�w�5�w�5�w�5�w�5�w�5�w�5�i�5Ph�5�έ5�w�5�o�5`L�5��5���5��5��5�5���5���5��5� �5�
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/// <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;
}
}
/// <summary>
/// Process extra data fields updating the entry based on the contents.
/// </summary>
/// <param name="localHeader">True if the extra data fields should be handled
/// for a local header, rather than for a central header.
/// </param>
internal void ProcessExtraData(bool localHeader)
{
ZipExtraData extraData = new ZipExtraData(this.extra);
if (extraData.Find(0x0001))
{
if ((versionToExtract & 0xff) < ZipConstants.VersionZip64)
{
throw new ZipException("Zip64 Extended information found but version is not valid");
}
// The recorded size will change but remember that this is zip64.
forceZip64_ = true;
if (extraData.ValueLength < 4)
{
throw new ZipException("Extra data extended Zip64 information length is invalid");
}
if (localHeader || (size == uint.MaxValue))
{
size = (ulong)extraData.ReadLong();
}
if (localHeader || (compressedSize == uint.MaxValue))
{
compressedSize = (ulong)extraData.ReadLong();
}
}
else
{
if (
((versionToExtract & 0xff) >= ZipConstants.VersionZip64) &&
((size == uint.MaxValue) ||
(compressedSize == uint.MaxValue)))
{
throw new ZipException("Zip64 Extended information required but is missing.");
}
}
/* TODO: Testing for handling of windows extra data
* if ( extraData.Find(10) ) {
* // No room for any tags.
* if ( extraData.ValueLength < 8 ) {
* throw new ZipException("NTFS Extra data invalid");
* }
*
* extraData.ReadInt(); // Reserved
*
* while ( extraData.UnreadCount >= 4 ) {
* int ntfsTag = extraData.ReadShort();
* int ntfsLength = extraData.ReadShort();
* if ( ntfsTag == 1 ) {
* if ( ntfsLength >= 24 ) {
* long lastModification = extraData.ReadLong();
* long lastAccess = extraData.ReadLong();
* long createTime = extraData.ReadLong();
*
* DateTime = System.DateTime.FromFileTime(lastModification);
* }
* break;
* }
* else {
* // An unknown NTFS tag so simply skip it.
* extraData.Skip(ntfsLength);
* }
* }
* }
* else
*/
if (extraData.Find(0x5455))
{
int length = extraData.ValueLength;
int flags = extraData.ReadByte();
// Can include other times but these are ignored. Length of data should
// actually be 1 + 4 * no of bits in flags.
if (((flags & 1) != 0) && (length >= 5))
{
int iTime = extraData.ReadInt();
DateTime = (new System.DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
}
}
}
/// <summary>
/// Starts a new Zip entry. It automatically closes the previous
/// entry if present.
/// All entry elements bar name are optional, but must be correct if present.
/// If the compression method is stored and the output is not patchable
/// the compression for that entry is automatically changed to deflate level 0
/// </summary>
/// <param name="entry">
/// the entry.
/// </param>
/// <exception cref="System.ArgumentNullException">
/// if entry passed is null.
/// </exception>
/// <exception cref="System.IO.IOException">
/// if an I/O error occured.
/// </exception>
/// <exception cref="System.InvalidOperationException">
/// if stream was finished
/// </exception>
/// <exception cref="ZipException">
/// Too many entries in the Zip file<br/>
/// Entry name is too long<br/>
/// Finish has already been called<br/>
/// </exception>
public void PutNextEntry(ZipEntryM entry)
{
if (entry == null)
{
//throw new ArgumentNullException(//nameof//(entry));
}
if (entries == null)
{
//throw new InvalidOperationException("ZipOutputStream was finished");
}
if (curEntry != null)
{
CloseEntry();
}
if (entries.Count == int.MaxValue)
{
//throw new ZipException("Too many entries for Zip file");
}
CompressionMethod method = entry.CompressionMethod;
int compressionLevel = defaultCompressionLevel;
// Clear flags that the library manages internally
entry.Flags &= (int)GeneralBitFlags.UnicodeText;
patchEntryHeader = false;
bool headerInfoAvailable;
// No need to compress - definitely no data.
if (entry.Size == 0)
{
entry.CompressedSize = entry.Size;
entry.Crc = 0;
method = CompressionMethod.Stored;
headerInfoAvailable = true;
}
else
{
headerInfoAvailable = (entry.Size >= 0) && entry.HasCrc && entry.CompressedSize >= 0;
// Switch to deflation if storing isnt possible.
if (method == CompressionMethod.Stored)
{
if (!headerInfoAvailable)
{
if (!CanPatchEntries)
{
// Can't patch entries so storing is not possible.
method = CompressionMethod.Deflated;
compressionLevel = 0;
}
}
else // entry.size must be > 0
{
entry.CompressedSize = entry.Size;
headerInfoAvailable = entry.HasCrc;
}
}
}
if (headerInfoAvailable == false)
{
if (CanPatchEntries == false)
{
// Only way to record size and compressed size is to append a data descriptor
// after compressed data.
// Stored entries of this form have already been converted to deflating.
entry.Flags |= 8;
}
else
{
patchEntryHeader = true;
}
}
if (Password != null)
{
entry.IsCrypted = true;
if (entry.Crc < 0)
{
// Need to append a data descriptor as the crc isnt available for use
// with encryption, the date is used instead. Setting the flag
// indicates this to the decompressor.
entry.Flags |= 8;
}
}
entry.Offset = offset;
entry.CompressionMethod = (CompressionMethod)method;
curMethod = method;
sizePatchPos = -1;
if ((useZip64_ == UseZip64.On) || ((entry.Size < 0) && (useZip64_ == UseZip64.Dynamic)))
{
entry.ForceZip64();
}
// Write the local file header
WriteLeInt(ZipConstants.LocalHeaderSignature);
WriteLeShort(entry.Version);
WriteLeShort(entry.Flags);
WriteLeShort((byte)entry.CompressionMethodForHeader);
WriteLeInt((int)entry.DosTime);
// TODO: Refactor header writing. Its done in several places.
if (headerInfoAvailable)
{
WriteLeInt((int)entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
WriteLeInt(-1);
WriteLeInt(-1);
}
else
{
WriteLeInt(entry.IsCrypted ? (int)entry.CompressedSize + ZipConstants.CryptoHeaderSize : (int)entry.CompressedSize);
WriteLeInt((int)entry.Size);
}
}
else
{
if (patchEntryHeader)
{
crcPatchPos = baseOutputStream_.Position;
}
WriteLeInt(0); // Crc
if (patchEntryHeader)
{
sizePatchPos = baseOutputStream_.Position;
}
// For local header both sizes appear in Zip64 Extended Information
if (entry.LocalHeaderRequiresZip64 || patchEntryHeader)
{
WriteLeInt(-1);
WriteLeInt(-1);
}
else
{
WriteLeInt(0); // Compressed size
WriteLeInt(0); // Uncompressed size
}
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (name.Length > 0xFFFF)
{
//throw new ZipException("Entry name too long.");
}
var ed = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64)
{
ed.StartNewEntry();
if (headerInfoAvailable)
{
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
}
else
{
ed.AddLeLong(-1);
ed.AddLeLong(-1);
}
ed.AddNewEntry(1);
if (!ed.Find(1))
{
//throw new ZipException("Internal error cant find extra data");
}
if (patchEntryHeader)
{
sizePatchPos = ed.CurrentReadIndex;
}
}
else
{
ed.Delete(1);
}
if (entry.AESKeySize > 0)
{
AddExtraDataAES(entry, ed);
}
byte[] extra = ed.GetEntryData();
WriteLeShort(name.Length);
WriteLeShort(extra.Length);
if (name.Length > 0)
{
baseOutputStream_.Write(name, 0, name.Length);
}
if (entry.LocalHeaderRequiresZip64 && patchEntryHeader)
{
sizePatchPos += baseOutputStream_.Position;
}
if (extra.Length > 0)
{
baseOutputStream_.Write(extra, 0, extra.Length);
}
offset += ZipConstants.LocalHeaderBaseSize + name.Length + extra.Length;
// Fix offsetOfCentraldir for AES
if (entry.AESKeySize > 0)
{
offset += entry.AESOverheadSize;
}
// Activate the entry.
curEntry = entry;
crc.Reset();
if (method == CompressionMethod.Deflated)
{
deflater_.Reset();
deflater_.SetLevel(compressionLevel);
}
size = 0;
if (entry.IsCrypted)
{
if (entry.AESKeySize > 0)
{
WriteAESHeader(entry);
}
else
{
if (entry.Crc < 0) // so testing Zip will says its ok
{
WriteEncryptionHeader(entry.DosTime << 16);
}
else
{
WriteEncryptionHeader(entry.Crc);
}
}
}
}
public void PutNextEntry(ZipEntry entry)
{
if (entry == null)
{
throw new ArgumentNullException("entry");
}
if (this.entries == null)
{
throw new InvalidOperationException("ZipOutputStream was finished");
}
if (this.curEntry != null)
{
this.CloseEntry();
}
if (this.entries.Count == 2147483647)
{
throw new ZipException("Too many entries for Zip file");
}
CompressionMethod compressionMethod = entry.CompressionMethod;
int level = this.defaultCompressionLevel;
entry.Flags &= 2048;
this.patchEntryHeader = false;
bool flag;
if (entry.Size == 0L)
{
entry.CompressedSize = entry.Size;
entry.Crc = 0L;
compressionMethod = CompressionMethod.Stored;
flag = true;
}
else
{
flag = (entry.Size >= 0L && entry.HasCrc && entry.CompressedSize >= 0L);
if (compressionMethod == CompressionMethod.Stored)
{
if (!flag)
{
if (!base.CanPatchEntries)
{
compressionMethod = CompressionMethod.Deflated;
level = 0;
}
}
else
{
entry.CompressedSize = entry.Size;
flag = entry.HasCrc;
}
}
}
if (!flag)
{
if (!base.CanPatchEntries)
{
entry.Flags |= 8;
}
else
{
this.patchEntryHeader = true;
}
}
if (base.Password != null)
{
entry.IsCrypted = true;
if (entry.Crc < 0L)
{
entry.Flags |= 8;
}
}
entry.Offset = this.offset;
entry.CompressionMethod = compressionMethod;
this.curMethod = compressionMethod;
this.sizePatchPos = -1L;
if (this.useZip64_ == UseZip64.On || (entry.Size < 0L && this.useZip64_ == UseZip64.Dynamic))
{
entry.ForceZip64();
}
this.WriteLeInt(67324752);
this.WriteLeShort(entry.Version);
this.WriteLeShort(entry.Flags);
this.WriteLeShort((int)((byte)entry.CompressionMethodForHeader));
this.WriteLeInt((int)entry.DosTime);
if (flag)
{
this.WriteLeInt((int)entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
this.WriteLeInt(-1);
this.WriteLeInt(-1);
}
else
{
this.WriteLeInt((!entry.IsCrypted) ? ((int)entry.CompressedSize) : ((int)entry.CompressedSize + 12));
this.WriteLeInt((int)entry.Size);
}
}
else
{
if (this.patchEntryHeader)
{
this.crcPatchPos = this.baseOutputStream_.Position;
}
this.WriteLeInt(0);
if (this.patchEntryHeader)
{
this.sizePatchPos = this.baseOutputStream_.Position;
}
if (entry.LocalHeaderRequiresZip64 || this.patchEntryHeader)
{
this.WriteLeInt(-1);
this.WriteLeInt(-1);
}
else
{
this.WriteLeInt(0);
this.WriteLeInt(0);
}
}
byte[] array = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (array.Length > 65535)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData zipExtraData = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64)
{
zipExtraData.StartNewEntry();
if (flag)
{
zipExtraData.AddLeLong(entry.Size);
zipExtraData.AddLeLong(entry.CompressedSize);
}
else
{
zipExtraData.AddLeLong(-1L);
zipExtraData.AddLeLong(-1L);
}
zipExtraData.AddNewEntry(1);
if (!zipExtraData.Find(1))
{
throw new ZipException("Internal error cant find extra data");
}
if (this.patchEntryHeader)
{
this.sizePatchPos = (long)zipExtraData.CurrentReadIndex;
}
}
else
{
zipExtraData.Delete(1);
}
if (entry.AESKeySize > 0)
{
ZipOutputStream.AddExtraDataAES(entry, zipExtraData);
}
byte[] entryData = zipExtraData.GetEntryData();
this.WriteLeShort(array.Length);
this.WriteLeShort(entryData.Length);
if (array.Length > 0)
{
this.baseOutputStream_.Write(array, 0, array.Length);
}
if (entry.LocalHeaderRequiresZip64 && this.patchEntryHeader)
{
this.sizePatchPos += this.baseOutputStream_.Position;
}
if (entryData.Length > 0)
{
this.baseOutputStream_.Write(entryData, 0, entryData.Length);
}
this.offset += (long)(30 + array.Length + entryData.Length);
if (entry.AESKeySize > 0)
{
this.offset += (long)entry.AESOverheadSize;
}
this.curEntry = entry;
this.crc.Reset();
if (compressionMethod == CompressionMethod.Deflated)
{
this.deflater_.Reset();
this.deflater_.SetLevel(level);
}
this.size = 0L;
if (entry.IsCrypted)
{
if (entry.AESKeySize > 0)
{
this.WriteAESHeader(entry);
}
else if (entry.Crc < 0L)
{
this.WriteEncryptionHeader(entry.DosTime << 16);
}
else
{
this.WriteEncryptionHeader(entry.Crc);
}
}
}
// For AES the method in the entry is 99, and the real compression method is in the extradata
//
private void ProcessAESExtraData(ZipExtraData extraData)
{
if (extraData.Find(0x9901)) {
// Set version and flag for Zipfile.CreateAndInitDecryptionStream
versionToExtract = ZipConstants.VERSION_AES; // Ver 5.1 = AES see "Version" getter
// Set StrongEncryption flag for ZipFile.CreateAndInitDecryptionStream
Flags = Flags | (int)GeneralBitFlags.StrongEncryption;
//
// Unpack AES extra data field see http://www.winzip.com/aes_info.htm
int length = extraData.ValueLength; // Data size currently 7
if (length < 7)
throw new ZipException("AES Extra Data Length " + length + " invalid.");
int ver = extraData.ReadShort(); // Version number (1=AE-1 2=AE-2)
int vendorId = extraData.ReadShort(); // 2-character vendor ID 0x4541 = "AE"
int encrStrength = extraData.ReadByte(); // encryption strength 1 = 128 2 = 192 3 = 256
int actualCompress = extraData.ReadShort(); // The actual compression method used to compress the file
_aesVer = ver;
_aesEncryptionStrength = encrStrength;
method = (CompressionMethod)actualCompress;
} else
throw new ZipException("AES Extra Data missing");
}
public void PutNextEntry(ZipEntry entry)
{
bool hasCrc;
if (entry == null)
{
throw new ArgumentNullException("entry");
}
if (this.entries == null)
{
throw new InvalidOperationException("ZipOutputStream was finished");
}
if (this.curEntry != null)
{
this.CloseEntry();
}
if (this.entries.Count == 0x7fffffff)
{
throw new ZipException("Too many entries for Zip file");
}
CompressionMethod compressionMethod = entry.CompressionMethod;
int defaultCompressionLevel = this.defaultCompressionLevel;
entry.Flags &= 0x800;
this.patchEntryHeader = false;
if (entry.Size == 0L)
{
entry.CompressedSize = entry.Size;
entry.Crc = 0L;
compressionMethod = CompressionMethod.Stored;
hasCrc = true;
}
else
{
hasCrc = ((entry.Size >= 0L) && entry.HasCrc) && (entry.CompressedSize >= 0L);
if (compressionMethod == CompressionMethod.Stored)
{
if (!hasCrc)
{
if (!base.CanPatchEntries)
{
compressionMethod = CompressionMethod.Deflated;
defaultCompressionLevel = 0;
}
}
else
{
entry.CompressedSize = entry.Size;
hasCrc = entry.HasCrc;
}
}
}
if (!hasCrc)
{
if (!base.CanPatchEntries)
{
entry.Flags |= 8;
}
else
{
this.patchEntryHeader = true;
}
}
if (base.Password != null)
{
entry.IsCrypted = true;
if (entry.Crc < 0L)
{
entry.Flags |= 8;
}
}
entry.Offset = this.offset;
entry.CompressionMethod = compressionMethod;
this.curMethod = compressionMethod;
this.sizePatchPos = -1L;
if ((this.useZip64_ == ICSharpCode.SharpZipLib.Zip.UseZip64.On) || ((entry.Size < 0L) && (this.useZip64_ == ICSharpCode.SharpZipLib.Zip.UseZip64.Dynamic)))
{
entry.ForceZip64();
}
this.WriteLeInt(0x4034b50);
this.WriteLeShort(entry.Version);
this.WriteLeShort(entry.Flags);
this.WriteLeShort((byte) entry.CompressionMethodForHeader);
this.WriteLeInt((int) entry.DosTime);
if (hasCrc)
{
this.WriteLeInt((int) entry.Crc);
if (entry.LocalHeaderRequiresZip64)
{
this.WriteLeInt(-1);
this.WriteLeInt(-1);
}
else
{
this.WriteLeInt(entry.IsCrypted ? (((int) entry.CompressedSize) + 12) : ((int) entry.CompressedSize));
this.WriteLeInt((int) entry.Size);
}
}
else
{
if (this.patchEntryHeader)
{
this.crcPatchPos = base.baseOutputStream_.Position;
}
this.WriteLeInt(0);
if (this.patchEntryHeader)
{
this.sizePatchPos = base.baseOutputStream_.Position;
}
if (entry.LocalHeaderRequiresZip64 || this.patchEntryHeader)
{
this.WriteLeInt(-1);
this.WriteLeInt(-1);
}
else
{
this.WriteLeInt(0);
this.WriteLeInt(0);
}
}
byte[] buffer = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (buffer.Length > 0xffff)
{
throw new ZipException("Entry name too long.");
}
ZipExtraData extraData = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64)
{
extraData.StartNewEntry();
if (hasCrc)
{
extraData.AddLeLong(entry.Size);
extraData.AddLeLong(entry.CompressedSize);
}
else
{
extraData.AddLeLong(-1L);
extraData.AddLeLong(-1L);
}
extraData.AddNewEntry(1);
if (!extraData.Find(1))
{
throw new ZipException("Internal error cant find extra data");
}
if (this.patchEntryHeader)
{
this.sizePatchPos = extraData.CurrentReadIndex;
}
}
else
{
extraData.Delete(1);
}
if (entry.AESKeySize > 0)
{
AddExtraDataAES(entry, extraData);
}
byte[] entryData = extraData.GetEntryData();
this.WriteLeShort(buffer.Length);
this.WriteLeShort(entryData.Length);
if (buffer.Length > 0)
{
base.baseOutputStream_.Write(buffer, 0, buffer.Length);
}
if (entry.LocalHeaderRequiresZip64 && this.patchEntryHeader)
{
this.sizePatchPos += base.baseOutputStream_.Position;
}
if (entryData.Length > 0)
{
base.baseOutputStream_.Write(entryData, 0, entryData.Length);
}
this.offset += (30 + buffer.Length) + entryData.Length;
if (entry.AESKeySize > 0)
{
this.offset += entry.AESOverheadSize;
}
this.curEntry = entry;
this.crc.Reset();
if (compressionMethod == CompressionMethod.Deflated)
{
base.deflater_.Reset();
base.deflater_.SetLevel(defaultCompressionLevel);
}
this.size = 0L;
if (entry.IsCrypted)
{
if (entry.AESKeySize > 0)
{
this.WriteAESHeader(entry);
}
else if (entry.Crc < 0L)
{
this.WriteEncryptionHeader(entry.DosTime << 0x10);
}
else
{
this.WriteEncryptionHeader(entry.Crc);
}
}
}