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[FileTools] Get Zip/TZip work done up to this point committed

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This commit is contained in:
Matt Nadareski
2016-09-13 21:36:45 -07:00
parent 7a08f8444b
commit 7550b38024
3 changed files with 203 additions and 0 deletions
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41
SabreTools.Helper/Data/Structs.cs
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@@ -472,4 +472,45 @@ namespace SabreTools.Helper
}
#endregion
#region Archive structs
/// <summary>
/// Intermediate struct for holding zip archive information
/// </summary>
public struct ZipArchiveStruct
{
public string FileName;
public string Comment;
public bool Zip64;
public List<ZipArchiveEntryStruct> Entries;
public int SOCDOffset;
public int EOCDOffset;
public int CentralDirectoryCRC;
}
/// <summary>
/// Intermediate struct for holding zip archive entry information
/// </summary>
public struct ZipArchiveEntryStruct
{
public short VersionMadeBy;
public short VersionNeeded;
public short GeneralPurposeFlag;
public short CompressionMethod;
public short LastModFileTime;
public short LastModFileDate;
public int CRC;
public int CompressedSize;
public int UncompressedSize;
public string FileName;
public string ExtraField;
public string Comment;
public short InternalFileAttributes;
public int ExternalFileAttributes;
public int RelativeOffset;
}
#endregion
}

141
SabreTools.Helper/Tools/FileTools.cs
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@@ -425,6 +425,34 @@ namespace SabreTools.Helper
return success;
}
ZipArchiveStruct zas = ReadCentralDirectory(inputArchive, logger);
Console.WriteLine("Archive Filename: " + zas.FileName);
Console.WriteLine("Archive Comment: " + zas.Comment.Length + " " + zas.Comment);
Console.WriteLine("Archive Central Directory CRC: " + zas.CentralDirectoryCRC.ToString("X8"));
Console.WriteLine();
Console.WriteLine("Entries:");
foreach (ZipArchiveEntryStruct zaes in zas.Entries)
{
Console.WriteLine("Entry Filename: " + zaes.FileName.Length + " " + zaes.FileName);
Console.WriteLine("Entry Comment: " + zaes.Comment.Length + " " + zaes.Comment);
Console.WriteLine("Entry Compressed Size: " + zaes.CompressedSize);
Console.WriteLine("Entry Compression Method: " + zaes.CompressionMethod);
Console.WriteLine("Entry CRC: " + zaes.CRC.ToString("X8"));
Console.WriteLine("Entry External File Attributes: " + zaes.ExternalFileAttributes);
Console.WriteLine("Entry Extra Field: " + zaes.ExtraField.Length + " " + zaes.ExtraField);
Console.WriteLine("Entry General Purpose Flag: " + zaes.GeneralPurposeFlag);
Console.WriteLine("Entry Internal File Attributes: " + zaes.InternalFileAttributes);
Console.WriteLine("Entry Last Modification File Date: " + zaes.LastModFileDate);
Console.WriteLine("Entry Last Modification File Time: " + zaes.LastModFileTime);
Console.WriteLine("Entry Relative Offset: " + zaes.RelativeOffset);
Console.WriteLine("Entry Uncompressed Size: " + zaes.UncompressedSize);
Console.WriteLine("Entry Version Made By: " + zaes.VersionMadeBy);
Console.WriteLine("Entry Version Needed: " + zaes.VersionNeeded);
Console.WriteLine();
}
Console.ReadLine();
/*
ZipArchive outarchive = null;
try
{
@@ -479,6 +507,7 @@ namespace SabreTools.Helper
{
outarchive?.Dispose();
}
*/
return success;
}
@@ -858,6 +887,118 @@ namespace SabreTools.Helper
}
}
/// <summary>
/// Read the current directory record
/// </summary>
/// <param name="input">Name of the input file to check</param>
/// <param name="logger">Logger object for file and console output</param>
/// <remarks>This does not do any handling for Zip64 currently</remarks>
public static ZipArchiveStruct ReadCentralDirectory(string input, Logger logger)
{
// Create the zip archive struct to hold all of the information
ZipArchiveStruct zas = new ZipArchiveStruct
{
FileName = Path.GetFileNameWithoutExtension(input),
Entries = new List<ZipArchiveEntryStruct>(),
};
int position = -1;
// Seek backwards to find the EOCD pattern
using (BinaryReader br = new BinaryReader(File.OpenRead(input)))
{
int sig = 101010256;
int read = 0;
int index = -5;
while (sig != read && (-index) < new FileInfo(input).Length)
{
br.BaseStream.Seek(index, SeekOrigin.End);
read = br.ReadInt32();
index--;
}
// If we found the signature, then set the correct position
if (sig == read)
{
position = (int)br.BaseStream.Position - 4;
}
}
// If we found the EOCD, get all of the information out of that area
if (position != -1)
{
zas.EOCDOffset = (int)position;
using (BinaryReader br = new BinaryReader(File.OpenRead(input)))
{
br.BaseStream.Seek(position, SeekOrigin.Begin);
br.ReadInt32(); // end of central dir signature
br.ReadInt16(); // number of this disk
br.ReadInt16(); // number of the disk with the start of the central directory
br.ReadInt16(); // total number of entries in the central directory on this disk
br.ReadInt16(); // total number of entries in the central directory
br.ReadInt32(); // size of the central directory
position = br.ReadInt32(); // offset of start of central directory with respect to the starting disk number
int commentlength = br.ReadInt16();
zas.Comment = Style.ConvertHex(BitConverter.ToString(br.ReadBytes(commentlength)));
}
}
// If we found the SOCD, get all of the information out of that area
if (position != -1 && position != zas.EOCDOffset)
{
zas.SOCDOffset = position;
using (BinaryReader br = new BinaryReader(File.OpenRead(input)))
{
int temp = 0;
while (temp != 84233040 /* digital signature */ && temp != 101010256 /* eocd */)
{
ZipArchiveEntryStruct zaes = new ZipArchiveEntryStruct();
br.BaseStream.Seek(position, SeekOrigin.Begin);
br.ReadInt32(); // central file header signature
zaes.VersionMadeBy = br.ReadInt16();
zaes.VersionNeeded = br.ReadInt16();
zaes.GeneralPurposeFlag = br.ReadInt16();
zaes.CompressionMethod = br.ReadInt16();
zaes.LastModFileTime = br.ReadInt16();
zaes.LastModFileDate = br.ReadInt16();
zaes.CRC = br.ReadInt32();
zaes.CompressedSize = br.ReadInt32();
zaes.UncompressedSize = br.ReadInt32();
int fileNameLength = br.ReadInt16();
int extraFieldLength = br.ReadInt16();
int fileCommentLength = br.ReadInt16();
br.ReadInt16(); // disk number start
zaes.InternalFileAttributes = br.ReadInt16();
zaes.ExternalFileAttributes = br.ReadInt32();
zaes.RelativeOffset = br.ReadInt32();
zaes.FileName = Style.ConvertHex(BitConverter.ToString(br.ReadBytes(fileNameLength)));
zaes.ExtraField = Style.ConvertHex(BitConverter.ToString(br.ReadBytes(extraFieldLength)));
zaes.Comment = Style.ConvertHex(BitConverter.ToString(br.ReadBytes(fileCommentLength)));
position += 46 + fileNameLength + extraFieldLength + fileCommentLength;
temp = br.ReadInt32();
zas.Entries.Add(zaes);
}
}
}
// Finally, get a hash of the entire central directory (between SOCD and EOCD)
if (zas.SOCDOffset > 0 && zas.EOCDOffset > 0)
{
using (BinaryReader br = new BinaryReader(File.OpenRead(input)))
{
br.BaseStream.Seek(zas.SOCDOffset, SeekOrigin.Begin);
byte[] cd = br.ReadBytes(zas.EOCDOffset - zas.SOCDOffset);
OptimizedCRC ocrc = new OptimizedCRC();
ocrc.Update(cd, 0, cd.Length);
zas.CentralDirectoryCRC = ocrc.Value;
}
}
return zas;
}
#endregion
#region File Manipulation

21
SabreTools.Helper/Tools/Style.cs
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@@ -525,6 +525,27 @@ namespace SabreTools.Helper
return s;
}
/// <summary>
/// http://stackoverflow.com/questions/5613279/c-sharp-hex-to-ascii
/// </summary>
public static string ConvertHex(String hexString)
{
if (hexString.Contains("-"))
{
hexString = hexString.Replace("-", "");
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < hexString.Length; i += 2)
{
String hs = hexString.Substring(i, 2);
sb.Append(Convert.ToChar(Convert.ToUInt32(hs, 16)));
}
return sb.ToString();
}
#endregion
}
}