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5d9d63fb0822e5fa2db393dc0df918c4eac6dcb7
RomVault/ROMVault2/FixFileCopy.cs

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First Public Release.
2014-09-23 12:06:15 -07:00
/******************************************************
* ROMVault2 is written by Gordon J. *
* Contact gordon@romvault.com *
* Copyright 2014 *
******************************************************/
using System;
using System.ComponentModel;
using System.Diagnostics;
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using System.Drawing;
using System.IO;
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using System.Security.Cryptography;
using ROMVault2.RvDB;
using ROMVault2.SupportedFiles;
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using ROMVault2.SupportedFiles.SevenZip;
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using ROMVault2.SupportedFiles.Zip;
using ROMVault2.SupportedFiles.Zip.ZLib;
using ROMVault2.Utils;
namespace ROMVault2
{
public enum ReturnCode { Good, RescanNeeded, FindFixes, LogicError, FileSystemError, SourceCRCCheckSumError, SourceCheckSumError, DestinationCheckSumError, StartOver }
public static class FixFileCopy
{
private const int BufferSize = 4096 * 128;
private static byte[] _buffer;
// This Function returns:
// Good : Everything Worked Correctly
// RescanNeeded : Something unexpectidly changed in the files, so Stop prompt user to rescan.
// LogicError : This Should never happen and is a logic problem in the code
// FileSystemError : Something is wrong with the files
/// <summary>
/// Performs the RomVault File Copy, with the source and destination being files or zipped files
/// </summary>
/// <param name="fileIn">This is the file being copied, it may be a zipped file or a regular file system file</param>
/// <param name="zipFileOut">This is the zip file that is being writen to, if it is null a new zip file will be made if we are coping to a zip</param>
/// <param name="zipFilenameOut">This is the name of the .zip file to be made that will be created in zipFileOut</param>
/// <param name="fileOut">This is the actual output filename</param>
/// <param name="forceRaw">if true then we will do a raw copy, this is so that we can copy corrupt zips</param>
/// <param name="error">This is the returned error message if this copy fails</param>
/// <param name="foundFile">If we are SHA1/MD5 checking the source file for the first time, and it is different from what we expected the correct values for this file are returned in foundFile</param>
/// <returns>ReturnCode.Good is the valid return code otherwire we have an error</returns>
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public static ReturnCode CopyFile(RvFile fileIn, ref ICompress zipFileOut, string zipFilenameOut, RvFile fileOut, bool forceRaw, out string error, out RvFile foundFile)
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{
foundFile = null;
error = "";
if (_buffer == null)
_buffer = new byte[BufferSize];
bool rawCopy = RawCopy(fileIn, fileOut, forceRaw);
ulong streamSize = 0;
ushort compressionMethod = 8;
bool sourceTrrntzip = false;
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ICompress zipFileIn = null;
Stream readStream = null;
ReturnCode retC;
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bool isZeroLengthFile = DBHelper.IsZeroLengthFile(fileOut);
if (!isZeroLengthFile)
{
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retC = CheckInputAndOutputFile(fileIn, fileOut, out error);
if (retC != ReturnCode.Good)
return retC;
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retC = OpenInputStream(fileIn, rawCopy, out zipFileIn, out sourceTrrntzip, out readStream, out streamSize, out compressionMethod, out error);
if (retC != ReturnCode.Good)
return retC;
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}
else
{
sourceTrrntzip = true;
}
if (!rawCopy && (Settings.FixLevel == eFixLevel.TrrntZipLevel1 || Settings.FixLevel == eFixLevel.TrrntZipLevel2 || Settings.FixLevel == eFixLevel.TrrntZipLevel3))
compressionMethod = 8;
#region Find and Check/Open Output Files
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Stream writeStream;
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retC = OpenOutputStream(fileOut, fileIn, ref zipFileOut, zipFilenameOut, compressionMethod, rawCopy, sourceTrrntzip, out writeStream, out error);
if (retC != ReturnCode.Good)
return retC;
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#endregion
byte[] bCRC;
byte[] bMD5 = null;
byte[] bSHA1 = null;
if (!isZeroLengthFile)
{
#region Do Data Tranfer
CRC32Hash crc32 = null;
MD5 md5 = null;
SHA1 sha1 = null;
if (!rawCopy)
{
crc32 = new CRC32Hash();
md5 = MD5.Create();
sha1 = SHA1.Create();
}
ulong sizetogo = streamSize;
while (sizetogo > 0)
{
int sizenow = sizetogo > BufferSize ? BufferSize : (int)sizetogo;
try
{
readStream.Read(_buffer, 0, sizenow);
}
catch (ZlibException)
{
if (fileIn.FileType == FileType.ZipFile && zipFileIn != null)
{
ZipReturn zr = zipFileIn.ZipFileCloseReadStream();
if (zr != ZipReturn.ZipGood)
{
error = "Error Closing " + zr + " Stream :" + zipFileIn.Filename(fileIn.ReportIndex);
return ReturnCode.FileSystemError;
}
zipFileIn.ZipFileClose();
}
else
{
readStream.Close();
}
if (fileOut.FileType == FileType.ZipFile)
{
ZipReturn zr = zipFileOut.ZipFileCloseWriteStream(new byte[] { 0, 0, 0, 0 });
if (zr != ZipReturn.ZipGood)
{
error = "Error Closing Stream " + zr;
return ReturnCode.FileSystemError;
}
zipFileOut.ZipFileRollBack();
}
else
{
writeStream.Flush();
writeStream.Close();
IO.File.Delete(zipFilenameOut);
}
error = "Error in Data Stream";
return ReturnCode.SourceCRCCheckSumError;
}
catch (Exception e)
{
error = "Error reading Source File " + e.Message;
return ReturnCode.FileSystemError;
}
if (!rawCopy)
{
crc32.TransformBlock(_buffer, 0, sizenow, null, 0);
md5.TransformBlock(_buffer, 0, sizenow, null, 0);
sha1.TransformBlock(_buffer, 0, sizenow, null, 0);
}
try
{
writeStream.Write(_buffer, 0, sizenow);
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
error = "Error writing out file. " + Environment.NewLine + e.Message;
return ReturnCode.FileSystemError;
}
sizetogo = sizetogo - (ulong)sizenow;
}
writeStream.Flush();
#endregion
#region Collect Checksums
// if we did a full copy then we just calculated all the checksums while doing the copy
if (!rawCopy)
{
crc32.TransformFinalBlock(_buffer, 0, 0);
md5.TransformFinalBlock(_buffer, 0, 0);
sha1.TransformFinalBlock(_buffer, 0, 0);
bCRC = crc32.Hash;
bMD5 = md5.Hash;
bSHA1 = sha1.Hash;
}
// if we raw copied and the source file has been FileChecked then we can trust the checksums in the source file
else
{
bCRC = ArrByte.Copy(fileIn.CRC);
if (fileIn.FileStatusIs(FileStatus.MD5Verified)) bMD5 = ArrByte.Copy(fileIn.MD5);
if (fileIn.FileStatusIs(FileStatus.SHA1Verified)) bSHA1 = ArrByte.Copy(fileIn.SHA1);
}
#endregion
#region close the ReadStream
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if ((fileIn.FileType == FileType.ZipFile || fileIn.FileType == FileType.SevenZipFile) && zipFileIn != null)
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{
ZipReturn zr = zipFileIn.ZipFileCloseReadStream();
if (zr != ZipReturn.ZipGood)
{
error = "Error Closing " + zr + " Stream :" + zipFileIn.Filename(fileIn.ReportIndex);
return ReturnCode.FileSystemError;
}
zipFileIn.ZipFileClose();
}
else
{
readStream.Close();
//if (IO.File.Exists(tmpFilename))
// IO.File.Delete(tmpFilename);
}
#endregion
}
else
{
// Zero Length File (Directory in a Zip)
if (fileOut.FileType == FileType.ZipFile)
{
zipFileOut.ZipFileAddDirectory();
}
bCRC = VarFix.CleanMD5SHA1("00000000", 8);
bMD5 = VarFix.CleanMD5SHA1("d41d8cd98f00b204e9800998ecf8427e", 32);
bSHA1 = VarFix.CleanMD5SHA1("da39a3ee5e6b4b0d3255bfef95601890afd80709", 40);
}
#region close the WriteStream
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if (fileOut.FileType == FileType.ZipFile || fileOut.FileType == FileType.SevenZipFile)
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{
ZipReturn zr = zipFileOut.ZipFileCloseWriteStream(bCRC);
if (zr != ZipReturn.ZipGood)
{
error = "Error Closing Stream " + zr;
return ReturnCode.FileSystemError;
}
fileOut.ZipFileIndex = zipFileOut.LocalFilesCount() - 1;
fileOut.ZipFileHeaderPosition = zipFileOut.LocalHeader(fileOut.ZipFileIndex);
}
else
{
writeStream.Flush();
writeStream.Close();
IO.FileInfo fi = new IO.FileInfo(zipFilenameOut);
fileOut.TimeStamp = fi.LastWriteTime;
}
#endregion
if (!isZeroLengthFile)
{
if (!rawCopy)
{
if (!ArrByte.bCompare(bCRC, fileIn.CRC))
{
fileIn.GotStatus = GotStatus.Corrupt;
error = "Source CRC does not match Source Data stream, corrupt Zip";
if (fileOut.FileType == FileType.ZipFile)
zipFileOut.ZipFileRollBack();
else
IO.File.Delete(zipFilenameOut);
return ReturnCode.SourceCRCCheckSumError;
}
fileIn.FileStatusSet(FileStatus.CRCVerified | FileStatus.SizeVerified);
bool sourceFailed = false;
// check to see if we have a MD5 from the DAT file
if (fileIn.FileStatusIs(FileStatus.MD5FromDAT))
{
if (fileIn.MD5 == null)
{
error = "Should have an filein MD5 from Dat but not found. Logic Error.";
return ReturnCode.LogicError;
}
if (!ArrByte.bCompare(fileIn.MD5, bMD5))
sourceFailed = true;
else
fileIn.FileStatusSet(FileStatus.MD5Verified);
}
// check to see if we have an MD5 (not from the DAT) so must be from previously scanning this file.
else if (fileIn.MD5 != null)
{
if (!ArrByte.bCompare(fileIn.MD5, bMD5))
{
// if we had an MD5 from a preview scan and it now does not match, something has gone really bad.
error = "The MD5 found does not match a previously scanned MD5, this should not happen, unless something got corrupt.";
return ReturnCode.LogicError;
}
}
else // (FileIn.MD5 == null)
{
fileIn.MD5 = bMD5;
fileIn.FileStatusSet(FileStatus.MD5Verified);
}
// check to see if we have a SHA1 from the DAT file
if (fileIn.FileStatusIs(FileStatus.SHA1FromDAT))
{
if (fileIn.SHA1 == null)
{
error = "Should have an filein SHA1 from Dat but not found. Logic Error.";
return ReturnCode.LogicError;
}
if (!ArrByte.bCompare(fileIn.SHA1, bSHA1))
sourceFailed = true;
else
fileIn.FileStatusSet(FileStatus.SHA1Verified);
}
// check to see if we have an SHA1 (not from the DAT) so must be from previously scanning this file.
else if (fileIn.SHA1 != null)
{
if (!ArrByte.bCompare(fileIn.SHA1, bSHA1))
{
// if we had an SHA1 from a preview scan and it now does not match, something has gone really bad.
error = "The SHA1 found does not match a previously scanned SHA1, this should not happen, unless something got corrupt.";
return ReturnCode.LogicError;
}
}
else // (FileIn.SHA1 == null)
{
fileIn.SHA1 = bSHA1;
fileIn.FileStatusSet(FileStatus.SHA1Verified);
}
if (sourceFailed)
{
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if (fileIn.FileType == FileType.ZipFile || fileIn.FileType == FileType.SevenZipFile)
First Public Release.
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{
RvFile tZFile = new RvFile(FileType.ZipFile);
foundFile = tZFile;
tZFile.ZipFileIndex = fileIn.ZipFileIndex;
tZFile.ZipFileHeaderPosition = fileIn.ZipFileHeaderPosition;
}
else
{
foundFile = new RvFile(fileIn.FileType);
}
foundFile.Name = fileIn.Name;
foundFile.Size = fileIn.Size;
foundFile.CRC = bCRC;
foundFile.MD5 = bMD5;
foundFile.SHA1 = bSHA1;
foundFile.TimeStamp = fileIn.TimeStamp;
foundFile.SetStatus(DatStatus.NotInDat, GotStatus.Got);
foundFile.FileStatusSet(FileStatus.SizeVerified | FileStatus.CRCVerified | FileStatus.MD5Verified | FileStatus.SHA1Verified);
if (fileOut.FileType == FileType.ZipFile)
zipFileOut.ZipFileRollBack();
else
IO.File.Delete(zipFilenameOut);
return ReturnCode.SourceCheckSumError;
}
}
}
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if (fileOut.FileType == FileType.ZipFile || fileOut.FileType == FileType.SevenZipFile)
First Public Release.
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{
fileOut.FileStatusSet(FileStatus.SizeFromHeader | FileStatus.CRCFromHeader);
}
if (fileOut.FileStatusIs(FileStatus.CRCFromDAT) && fileOut.CRC != null && !ArrByte.bCompare(fileOut.CRC, bCRC))
{
//Rollback the file
if (fileOut.FileType == FileType.ZipFile)
zipFileOut.ZipFileRollBack();
else
IO.File.Delete(zipFilenameOut);
return ReturnCode.DestinationCheckSumError;
}
fileOut.CRC = bCRC;
if (!rawCopy || fileIn.FileStatusIs(FileStatus.CRCVerified))
fileOut.FileStatusSet(FileStatus.CRCVerified);
if (bSHA1 != null)
{
if (fileOut.FileStatusIs(FileStatus.SHA1FromDAT) && fileOut.SHA1 != null && !ArrByte.bCompare(fileOut.SHA1, bSHA1))
{
//Rollback the file
if (fileOut.FileType == FileType.ZipFile)
zipFileOut.ZipFileRollBack();
else
IO.File.Delete(zipFilenameOut);
return ReturnCode.DestinationCheckSumError;
}
fileOut.SHA1 = bSHA1;
fileOut.FileStatusSet(FileStatus.SHA1Verified);
}
if (bMD5 != null)
{
if (fileOut.FileStatusIs(FileStatus.MD5FromDAT) && fileOut.MD5 != null && !ArrByte.bCompare(fileOut.MD5, bMD5))
{
//Rollback the file
if (fileOut.FileType == FileType.ZipFile)
zipFileOut.ZipFileRollBack();
else
IO.File.Delete(zipFilenameOut);
return ReturnCode.DestinationCheckSumError;
}
fileOut.MD5 = bMD5;
fileOut.FileStatusSet(FileStatus.MD5Verified);
}
if (fileIn.Size != null)
{
fileOut.Size = fileIn.Size;
fileOut.FileStatusSet(FileStatus.SizeVerified);
}
if (fileIn.GotStatus == GotStatus.Corrupt)
fileOut.GotStatus = GotStatus.Corrupt;
else
fileOut.GotStatus = GotStatus.Got; // Changes RepStatus to Correct
fileOut.FileStatusSet(FileStatus.SizeVerified);
if (fileOut.SHA1CHD == null && fileIn.SHA1CHD != null) fileOut.SHA1CHD = fileIn.SHA1CHD;
if (fileOut.MD5CHD == null && fileIn.MD5CHD != null) fileOut.MD5CHD = fileIn.MD5CHD;
fileOut.CHDVersion = fileIn.CHDVersion;
fileOut.FileStatusSet(FileStatus.SHA1CHDFromHeader | FileStatus.MD5CHDFromHeader | FileStatus.SHA1CHDVerified | FileStatus.MD5CHDVerified, fileIn);
return ReturnCode.Good;
}
//Raw Copy
// Returns True is a raw copy can be used
// Returns False is a full recompression is required
private static bool RawCopy(RvFile fileIn, RvFile fileOut, bool forceRaw)
{
if (fileIn == null || fileOut == null)
return false;
if ((fileIn.FileType != FileType.ZipFile) || (fileOut.FileType != FileType.ZipFile))
return false;
if (fileIn.Parent == null)
return false;
if (forceRaw) return true;
bool trrntzipped = (fileIn.Parent.ZipStatus & ZipStatus.TrrntZip) == ZipStatus.TrrntZip;
bool deepchecked = fileIn.FileStatusIs(FileStatus.SHA1Verified) && fileIn.FileStatusIs(FileStatus.MD5Verified);
switch (Settings.FixLevel)
{
case eFixLevel.TrrntZipLevel1:
return trrntzipped;
case eFixLevel.TrrntZipLevel2:
return trrntzipped && deepchecked;
case eFixLevel.TrrntZipLevel3:
return false;
case eFixLevel.Level1:
return true;
case eFixLevel.Level2:
return deepchecked;
case eFixLevel.Level3:
return false;
}
return false;
}
Very early SevenZip WIP version
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private static ReturnCode CheckInputAndOutputFile(RvFile fileIn, RvFile fileOut, out string error)
{
if (fileOut.FileStatusIs(FileStatus.SizeFromDAT) && fileOut.Size != null && fileIn.Size != fileOut.Size)
{
error = "Source and destination Size does not match. Logic Error.";
return ReturnCode.LogicError;
}
if (fileOut.FileStatusIs(FileStatus.CRCFromDAT) && fileOut.CRC != null && !ArrByte.bCompare(fileIn.CRC, fileOut.CRC))
{
error = "Source and destination CRC does not match. Logic Error.";
return ReturnCode.LogicError;
}
if (fileOut.FileStatusIs(FileStatus.SHA1FromDAT) && fileIn.FileStatusIs(FileStatus.SHA1Verified))
{
if (fileIn.SHA1 != null && fileOut.SHA1 != null && !ArrByte.bCompare(fileIn.SHA1, fileOut.SHA1))
{
error = "Source and destination SHA1 does not match. Logic Error.";
return ReturnCode.LogicError;
}
}
if (fileOut.FileStatusIs(FileStatus.MD5CHDFromDAT) && fileIn.FileStatusIs(FileStatus.MD5Verified))
{
if (fileIn.MD5 != null && fileOut.MD5 != null && !ArrByte.bCompare(fileIn.MD5, fileOut.MD5))
{
error = "Source and destination SHA1 does not match. Logic Error.";
return ReturnCode.LogicError;
}
}
error = "";
return ReturnCode.Good;
}
private static ReturnCode OpenInputStream(RvFile fileIn, bool rawCopy, out ICompress zipFileIn, out bool sourceTrrntzip, out Stream readStream, out ulong streamSize, out ushort compressionMethod, out string error)
{
zipFileIn = null;
sourceTrrntzip = false;
readStream = null;
streamSize = 0;
compressionMethod = 0;
switch (fileIn.FileType)
{
case FileType.SevenZipFile:
case FileType.ZipFile:
{
RvDir zZipFileIn = fileIn.Parent;
if (zZipFileIn.FileType != DBTypeGet.DirFromFile(fileIn.FileType))
{
error = "SevenZip File Open but Source File is not a SevenZip, Logic Error.";
return ReturnCode.LogicError;
}
string fileNameIn = zZipFileIn.FullName;
ZipReturn zr1;
if (fileIn.FileType == FileType.SevenZipFile)
{
sourceTrrntzip = false;
zipFileIn = new SevenZ();
zr1 = zipFileIn.ZipFileOpen(fileNameIn, zZipFileIn.TimeStamp, true);
}
else
{
sourceTrrntzip = (zZipFileIn.ZipStatus & ZipStatus.TrrntZip) == ZipStatus.TrrntZip;
zipFileIn = new ZipFile();
zr1 = zipFileIn.ZipFileOpen(fileNameIn, zZipFileIn.TimeStamp, fileIn.ZipFileHeaderPosition == null);
}
switch (zr1)
{
case ZipReturn.ZipGood:
break;
case ZipReturn.ZipErrorFileNotFound:
error = "File not found, Rescan required before fixing " + fileIn.Name;
return ReturnCode.FileSystemError;
case ZipReturn.ZipErrorTimeStamp:
error = "File has changed, Rescan required before fixing " + fileIn.Name;
return ReturnCode.FileSystemError;
default:
error = "Error Open Zip" + zr1 + ", with File " + fileIn.DatFullName;
return ReturnCode.FileSystemError;
}
if (fileIn.FileType == FileType.SevenZipFile)
{
SevenZ z = zipFileIn as SevenZ;
z.ZipFileOpenReadStream(fileIn.ZipFileIndex, out readStream, out streamSize);
}
else
{
ZipFile z = zipFileIn as ZipFile;
if (fileIn.ZipFileHeaderPosition != null)
z.ZipFileOpenReadStreamQuick((ulong)fileIn.ZipFileHeaderPosition, rawCopy, out readStream, out streamSize, out compressionMethod);
else
z.ZipFileOpenReadStream(fileIn.ZipFileIndex, rawCopy, out readStream, out streamSize, out compressionMethod);
}
}
break;
default:
{
string fileNameIn = fileIn.FullName;
if (!IO.File.Exists(fileNameIn))
{
error = "Rescan needed, File Changed :" + fileNameIn;
return ReturnCode.RescanNeeded;
}
IO.FileInfo fileInInfo = new IO.FileInfo(fileNameIn);
if (fileInInfo.LastWriteTime != fileIn.TimeStamp)
{
error = "Rescan needed, File Changed :" + fileNameIn;
return ReturnCode.RescanNeeded;
}
int errorCode = IO.FileStream.OpenFileRead(fileNameIn, out readStream);
if (errorCode != 0)
{
error = new Win32Exception(errorCode).Message + ". " + fileNameIn;
return ReturnCode.FileSystemError;
}
if (fileIn.Size == null)
{
error = "Null File Size found in Fixing File :" + fileNameIn;
return ReturnCode.LogicError;
}
streamSize = (ulong)fileIn.Size;
if ((ulong)readStream.Length != streamSize)
{
error = "Rescan needed, File Length Changed :" + fileNameIn;
return ReturnCode.RescanNeeded;
}
}
break;
}
error = "";
return ReturnCode.Good;
}
private static ReturnCode OpenOutputStream(RvFile fileOut, RvFile fileIn, ref ICompress zipFileOut, string zipFilenameOut, ushort compressionMethod, bool rawCopy, bool sourceTrrntzip, out System.IO.Stream writeStream, out string error)
{
writeStream = null;
switch (fileOut.FileType)
{
case FileType.ZipFile:
case FileType.SevenZipFile:
{
// if ZipFileOut == null then we have not open the output zip yet so open it from writing.
if (zipFileOut == null)
{
if (IO.Path.GetFileName(zipFilenameOut) == "__RomVault.tmp")
{
if (IO.File.Exists(zipFilenameOut))
IO.File.Delete(zipFilenameOut);
}
else if (IO.File.Exists(zipFilenameOut))
{
error = "Rescan needed, File Changed :" + zipFilenameOut;
return ReturnCode.RescanNeeded;
}
if (fileOut.FileType == FileType.ZipFile)
zipFileOut = new ZipFile();
else
zipFileOut = new SevenZ();
ZipReturn zrf = zipFileOut.ZipFileCreate(zipFilenameOut);
if (zrf != ZipReturn.ZipGood)
{
error = "Error Opening Write Stream " + zrf;
return ReturnCode.FileSystemError;
}
}
else
{
if (zipFileOut.ZipOpen != ZipOpenType.OpenWrite)
{
error = "Output Zip File is not set to OpenWrite, Logic Error.";
return ReturnCode.LogicError;
}
if (zipFileOut.ZipFilename != (new IO.FileInfo(zipFilenameOut).FullName))
{
error = "Output Zip file has changed name from " + zipFileOut.ZipFilename + " to " + zipFilenameOut + ". Logic Error";
return ReturnCode.LogicError;
}
}
if (fileIn.Size == null)
{
error = "Null File Size found in Fixing File :" + fileIn.FullName;
return ReturnCode.LogicError;
}
ZipReturn zr = zipFileOut.ZipFileOpenWriteStream(rawCopy, sourceTrrntzip, fileOut.Name, (ulong)fileIn.Size, compressionMethod, out writeStream);
if (zr != ZipReturn.ZipGood)
{
error = "Error Opening Write Stream " + zr;
return ReturnCode.FileSystemError;
}
}
break;
default:
{
if (IO.File.Exists(zipFilenameOut) && fileOut.GotStatus != GotStatus.Corrupt)
{
error = "Rescan needed, File Changed :" + zipFilenameOut;
return ReturnCode.RescanNeeded;
}
int errorCode = IO.FileStream.OpenFileWrite(zipFilenameOut, out writeStream);
if (errorCode != 0)
{
error = new Win32Exception(errorCode).Message + ". " + zipFilenameOut;
return ReturnCode.FileSystemError;
}
}
break;
}
error = "";
return ReturnCode.Good;
}
First Public Release.
2014-09-23 12:06:15 -07:00
}
}
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