public ZipFileHeader(ZipFileInfo fileInfo, bool zip64)
: this()
{
this.flags = ZipFileFlags.None;
this.compressionMethod = fileInfo.CompressionMethod;
this.fileName = Path.Combine(fileInfo.Path, fileInfo.Name);
CompressionEngine.DateTimeToDosDateAndTime(
fileInfo.LastWriteTime, out this.lastModDate, out this.lastModTime);
this.zip64 = zip64;
if (this.zip64)
{
this.compressedSize = UInt32.MaxValue;
this.uncompressedSize = UInt32.MaxValue;
this.diskStart = UInt16.MaxValue;
this.versionMadeBy = 45;
this.versionNeeded = 45;
ZipExtraFileField field = new ZipExtraFileField();
field.fieldType = ZipExtraFileFieldType.ZIP64;
field.SetZip64Data(
fileInfo.CompressedLength,
fileInfo.Length,
0,
fileInfo.ArchiveNumber);
this.extraFields = new ZipExtraFileField[] { field };
}
else
{
this.compressedSize = (uint)fileInfo.CompressedLength;
this.uncompressedSize = (uint)fileInfo.Length;
this.diskStart = (ushort)fileInfo.ArchiveNumber;
}
}
public ZipFileHeader(ZipFileInfo fileInfo, bool zip64)
: this()
{
this.flags = ZipFileFlags.None;
this.compressionMethod = fileInfo.CompressionMethod;
this.fileName = Path.Combine(fileInfo.Path, fileInfo.Name);
CompressionEngine.DateTimeToDosDateAndTime(
fileInfo.LastWriteTime, out this.lastModDate, out this.lastModTime);
this.zip64 = zip64;
if (this.zip64)
{
this.compressedSize = UInt32.MaxValue;
this.uncompressedSize = UInt32.MaxValue;
this.diskStart = UInt16.MaxValue;
this.versionMadeBy = 45;
this.versionNeeded = 45;
ZipExtraFileField field = new ZipExtraFileField();
field.fieldType = ZipExtraFileFieldType.ZIP64;
field.SetZip64Data(
fileInfo.CompressedLength,
fileInfo.Length,
0,
fileInfo.ArchiveNumber);
this.extraFields = new ZipExtraFileField[] { field };
}
else
{
this.compressedSize = (uint) fileInfo.CompressedLength;
this.uncompressedSize = (uint) fileInfo.Length;
this.diskStart = (ushort) fileInfo.ArchiveNumber;
}
}
/// <summary>
/// Creates a central file header from the information in a local file header.
/// </summary>
/// <param name="localFileHeader">Local file header to </param>
public ZipFileHeader(ZipFileHeader localFileHeader)
{
if (localFileHeader.central)
{
throw new ArgumentException();
}
this.central = true;
this.compressionMethod = localFileHeader.compressionMethod;
this.fileName = localFileHeader.fileName;
this.fileComment = localFileHeader.fileComment;
this.flags = localFileHeader.flags;
this.externalFileAttrs = localFileHeader.externalFileAttrs;
this.internalFileAttrs = localFileHeader.internalFileAttrs;
this.lastModDate = localFileHeader.lastModDate;
this.lastModTime = localFileHeader.lastModTime;
this.crc32 = localFileHeader.crc32;
if (this.zip64)
{
this.versionMadeBy = 45;
this.versionNeeded = 45;
this.compressedSize = UInt32.MaxValue;
this.uncompressedSize = UInt32.MaxValue;
this.diskStart = UInt16.MaxValue;
ZipExtraFileField field = new ZipExtraFileField();
field.fieldType = ZipExtraFileFieldType.ZIP64;
field.SetZip64Data(localFileHeader.compressedSize, localFileHeader.uncompressedSize, localFileHeader.localHeaderOffset, localFileHeader.diskStart);
this.extraFields = new ZipExtraFileField[] { field };
}
else
{
this.versionMadeBy = 20;
this.versionNeeded = 20;
this.localHeaderOffset = localFileHeader.localHeaderOffset;
this.compressedSize = localFileHeader.compressedSize;
this.uncompressedSize = localFileHeader.uncompressedSize;
}
}
public void Write(Stream stream, bool central)
{
byte[] fileNameBytes = (this.fileName != null
? Encoding.UTF8.GetBytes(this.fileName) : new byte[0]);
byte[] fileCommentBytes = (this.fileComment != null
? Encoding.UTF8.GetBytes(this.fileComment) : new byte[0]);
bool useUtf8 =
(this.fileName != null && fileNameBytes.Length > this.fileName.Length) ||
(this.fileComment != null && fileCommentBytes.Length > this.fileComment.Length);
if (useUtf8)
{
this.flags |= ZipFileFlags.UTF8;
}
BinaryWriter writer = new BinaryWriter(stream);
writer.Write(central ? CFHSIG : LFHSIG);
if (central)
{
writer.Write(this.versionMadeBy);
}
writer.Write(this.versionNeeded);
writer.Write((ushort)this.flags);
writer.Write((ushort)this.compressionMethod);
writer.Write(this.lastModTime);
writer.Write(this.lastModDate);
writer.Write(this.crc32);
writer.Write(this.compressedSize);
writer.Write(this.uncompressedSize);
ushort extraFieldLength = 0;
if (this.extraFields != null)
{
foreach (ZipExtraFileField field in this.extraFields)
{
if (field.data != null)
{
extraFieldLength += (ushort)(4 + field.data.Length);
}
}
}
writer.Write((ushort)fileNameBytes.Length);
writer.Write(extraFieldLength);
if (central)
{
writer.Write((ushort)fileCommentBytes.Length);
writer.Write(this.diskStart);
writer.Write(this.internalFileAttrs);
writer.Write(this.externalFileAttrs);
writer.Write(this.localHeaderOffset);
}
writer.Write(fileNameBytes);
if (this.extraFields != null)
{
foreach (ZipExtraFileField field in this.extraFields)
{
if (field.data != null)
{
field.Write(stream);
}
}
}
if (central)
{
writer.Write(fileCommentBytes);
}
}
public bool Read(Stream stream, bool central)
{
long startPos = stream.Position;
if (stream.Length - startPos <
(central ? CFH_FIXEDSIZE : LFH_FIXEDSIZE))
{
return(false);
}
BinaryReader reader = new BinaryReader(stream);
uint sig = reader.ReadUInt32();
if (sig == SPANSIG || sig == SPANSIG2)
{
// Spanned zip files may optionally begin with a special marker.
// Just ignore it and move on.
sig = reader.ReadUInt32();
}
if (sig != (central ? CFHSIG : LFHSIG))
{
return(false);
}
this.versionMadeBy = (central ? reader.ReadUInt16() : (ushort)0);
this.versionNeeded = reader.ReadUInt16();
this.flags = (ZipFileFlags)reader.ReadUInt16();
this.compressionMethod = (ZipCompressionMethod)reader.ReadUInt16();
this.lastModTime = reader.ReadInt16();
this.lastModDate = reader.ReadInt16();
this.crc32 = reader.ReadUInt32();
this.compressedSize = reader.ReadUInt32();
this.uncompressedSize = reader.ReadUInt32();
this.zip64 = this.uncompressedSize == UInt32.MaxValue;
int fileNameLength = reader.ReadUInt16();
int extraFieldLength = reader.ReadUInt16();
int fileCommentLength;
if (central)
{
fileCommentLength = reader.ReadUInt16();
this.diskStart = reader.ReadUInt16();
this.internalFileAttrs = reader.ReadUInt16();
this.externalFileAttrs = reader.ReadUInt32();
this.localHeaderOffset = reader.ReadUInt32();
}
else
{
fileCommentLength = 0;
this.diskStart = 0;
this.internalFileAttrs = 0;
this.externalFileAttrs = 0;
this.localHeaderOffset = 0;
}
if (stream.Length - stream.Position <
fileNameLength + extraFieldLength + fileCommentLength)
{
return(false);
}
#if CORECLR
Encoding headerEncoding = Encoding.UTF8;
#else
Encoding headerEncoding = ((this.flags | ZipFileFlags.UTF8) != 0 ?
Encoding.UTF8 : Encoding.GetEncoding(CultureInfo.CurrentCulture.TextInfo.OEMCodePage));
#endif
byte[] fileNameBytes = reader.ReadBytes(fileNameLength);
this.fileName = headerEncoding.GetString(fileNameBytes).Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar);
List <ZipExtraFileField> fields = new List <ZipExtraFileField>();
while (extraFieldLength > 0)
{
ZipExtraFileField field = new ZipExtraFileField();
if (!field.Read(stream, ref extraFieldLength))
{
return(false);
}
fields.Add(field);
if (field.fieldType == ZipExtraFileFieldType.ZIP64)
{
this.zip64 = true;
}
}
this.extraFields = fields.ToArray();
byte[] fileCommentBytes = reader.ReadBytes(fileCommentLength);
this.fileComment = headerEncoding.GetString(fileCommentBytes);
return(true);
}
public void Write(Stream stream, bool central)
{
byte[] fileNameBytes = (this.fileName != null
? Encoding.UTF8.GetBytes(this.fileName) : new byte[0]);
byte[] fileCommentBytes = (this.fileComment != null
? Encoding.UTF8.GetBytes(this.fileComment) : new byte[0]);
bool useUtf8 =
(this.fileName != null && fileNameBytes.Length > this.fileName.Length) ||
(this.fileComment != null && fileCommentBytes.Length > this.fileComment.Length);
if (useUtf8)
{
this.flags |= ZipFileFlags.UTF8;
}
BinaryWriter writer = new BinaryWriter(stream);
writer.Write(central ? CFHSIG : LFHSIG);
if (central)
{
writer.Write(this.versionMadeBy);
}
writer.Write(this.versionNeeded);
writer.Write((ushort) this.flags);
writer.Write((ushort) this.compressionMethod);
writer.Write(this.lastModTime);
writer.Write(this.lastModDate);
writer.Write(this.crc32);
writer.Write(this.compressedSize);
writer.Write(this.uncompressedSize);
ushort extraFieldLength = 0;
if (this.extraFields != null)
{
foreach (ZipExtraFileField field in this.extraFields)
{
if (field.data != null)
{
extraFieldLength += (ushort) (4 + field.data.Length);
}
}
}
writer.Write((ushort) fileNameBytes.Length);
writer.Write(extraFieldLength);
if (central)
{
writer.Write((ushort) fileCommentBytes.Length);
writer.Write(this.diskStart);
writer.Write(this.internalFileAttrs);
writer.Write(this.externalFileAttrs);
writer.Write(this.localHeaderOffset);
}
writer.Write(fileNameBytes);
if (this.extraFields != null)
{
foreach (ZipExtraFileField field in this.extraFields)
{
if (field.data != null)
{
field.Write(stream);
}
}
}
if (central)
{
writer.Write(fileCommentBytes);
}
}
public bool Read(Stream stream, bool central)
{
long startPos = stream.Position;
if (stream.Length - startPos <
(central ? CFH_FIXEDSIZE : LFH_FIXEDSIZE))
{
return false;
}
BinaryReader reader = new BinaryReader(stream);
uint sig = reader.ReadUInt32();
if (sig == SPANSIG || sig == SPANSIG2)
{
// Spanned zip files may optionally begin with a special marker.
// Just ignore it and move on.
sig = reader.ReadUInt32();
}
if (sig != (central ? CFHSIG : LFHSIG))
{
return false;
}
this.versionMadeBy = (central ? reader.ReadUInt16() : (ushort) 0);
this.versionNeeded = reader.ReadUInt16();
this.flags = (ZipFileFlags) reader.ReadUInt16();
this.compressionMethod = (ZipCompressionMethod) reader.ReadUInt16();
this.lastModTime = reader.ReadInt16();
this.lastModDate = reader.ReadInt16();
this.crc32 = reader.ReadUInt32();
this.compressedSize = reader.ReadUInt32();
this.uncompressedSize = reader.ReadUInt32();
this.zip64 = this.uncompressedSize == UInt32.MaxValue;
int fileNameLength = reader.ReadUInt16();
int extraFieldLength = reader.ReadUInt16();
int fileCommentLength;
if (central)
{
fileCommentLength = reader.ReadUInt16();
this.diskStart = reader.ReadUInt16();
this.internalFileAttrs = reader.ReadUInt16();
this.externalFileAttrs = reader.ReadUInt32();
this.localHeaderOffset = reader.ReadUInt32();
}
else
{
fileCommentLength = 0;
this.diskStart = 0;
this.internalFileAttrs = 0;
this.externalFileAttrs = 0;
this.localHeaderOffset = 0;
}
if (stream.Length - stream.Position <
fileNameLength + extraFieldLength + fileCommentLength)
{
return false;
}
Encoding headerEncoding = ((this.flags | ZipFileFlags.UTF8) != 0 ?
Encoding.UTF8 : Encoding.GetEncoding(CultureInfo.CurrentCulture.TextInfo.OEMCodePage));
byte[] fileNameBytes = reader.ReadBytes(fileNameLength);
this.fileName = headerEncoding.GetString(fileNameBytes).Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar);
List<ZipExtraFileField> fields = new List<ZipExtraFileField>();
while (extraFieldLength > 0)
{
ZipExtraFileField field = new ZipExtraFileField();
if (!field.Read(stream, ref extraFieldLength))
{
return false;
}
fields.Add(field);
if (field.fieldType == ZipExtraFileFieldType.ZIP64)
{
this.zip64 = true;
}
}
this.extraFields = fields.ToArray();
byte[] fileCommentBytes = reader.ReadBytes(fileCommentLength);
this.fileComment = headerEncoding.GetString(fileCommentBytes);
return true;
}
public void Write(Stream stream)
{
byte[] fileNameBytes = String.IsNullOrEmpty(this.fileName) ? new byte[0]: Encoding.UTF8.GetBytes(this.fileName);
byte[] fileCommentBytes = String.IsNullOrEmpty(this.fileComment) ? new byte[0] : Encoding.UTF8.GetBytes(this.fileComment);
bool useUtf8 = (this.fileName != null && fileNameBytes.Length > this.fileName.Length) || (this.fileComment != null && fileCommentBytes.Length > this.fileComment.Length);
if (useUtf8)
{
this.flags |= ZipFileFlags.UTF8;
}
short time = this.lastModTime;
short date = this.lastModDate;
if (time == 0 && date == 0)
{
long filetime = DateTime.UtcNow.ToFileTimeUtc();
FileTimeToDosDateTime(ref filetime, out date, out time);
}
BinaryWriter writer = new BinaryWriter(stream);
writer.Write(this.central ? CFHSIG : LFHSIG);
if (this.central)
{
writer.Write(this.versionMadeBy);
}
writer.Write(this.versionNeeded);
writer.Write((ushort)this.flags);
writer.Write((ushort)this.compressionMethod);
writer.Write(time);
writer.Write(date);
writer.Write(this.crc32);
writer.Write(this.compressedSize);
writer.Write(this.uncompressedSize);
ushort extraFieldLength = 0;
if (this.extraFields != null)
{
foreach (ZipExtraFileField field in this.extraFields)
{
if (field.data != null)
{
extraFieldLength += (ushort)(4 + field.data.Length);
}
}
}
writer.Write((ushort)fileNameBytes.Length);
writer.Write(extraFieldLength);
if (this.central)
{
writer.Write((ushort)fileCommentBytes.Length);
writer.Write(this.diskStart);
writer.Write(this.internalFileAttrs);
writer.Write(this.externalFileAttrs);
writer.Write(this.localHeaderOffset);
}
writer.Write(fileNameBytes);
if (this.extraFields != null)
{
foreach (ZipExtraFileField field in this.extraFields)
{
if (field.data != null)
{
field.Write(stream);
}
}
}
if (this.central)
{
writer.Write(fileCommentBytes);
}
}
