private void CheckSignature()
{
if (HeaderSignature.Where((t, i) => t != OleCFSSignature[i]).Any())
{
throw new CFFileFormatException("Invalid OLE structured storage file");
}
}
/// <summary>
/// Determines whether the specified folder contains files with
/// file extensions that do not match the content.
/// </summary>
/// <param name="folderPath">The folder path.</param>
/// <param name="recursive">if set to <c>true</c> [recursive].</param>
/// <returns>
/// <c>true</c> if [contains folder prohibited content]
/// [the specified folder path]; otherwise, <c>false</c>.
/// </returns>
public void ContainsFolderVerifyContent(
Delimon.Win32.IO.DirectoryInfo folderPath,
bool recursive,
ref List <FileResult> verifiedFiles,
ref List <FileResult> unVerifiedFiles,
ref List <FileResult> unknownFiles,
ref List <FileResult> ProhibitedFiles,
ref bool blShuttingDown,
string excludeFolders,
System.Data.DataTable dtSignatures,
bool blValidateZipFiles,
bool blHeaderVerificationIgnoreFileExtensions,
bool blProhibitedFilesIgnoreFileExtensions
)
{
WriteError(
string.Format(
@"Audit Folder ContentDetectorEngine: Checking folder '{0}'.",
folderPath.FullName), System.Diagnostics.EventLogEntryType.Information, 6000, 60, true);
HeaderSignature[] sigs = null;
try
{
if (dtSignatures == null)
{
sigs = HeaderSignature.StockSignatures;
}
else if (dtSignatures.Rows.Count == 0)
{
sigs = HeaderSignature.StockSignatures;
}
else
{
sigs = HeaderSignature.CustomSignatures(dtSignatures);
}
}
catch (Exception)
{
sigs = null;
}
if (sigs != null)
{
containsFolderVerifyContent(folderPath, recursive, ref verifiedFiles, ref unVerifiedFiles, ref unknownFiles, ref ProhibitedFiles, ref blShuttingDown, excludeFolders, sigs, blValidateZipFiles, blHeaderVerificationIgnoreFileExtensions, blProhibitedFilesIgnoreFileExtensions);
}
else
{
WriteError(
string.Format(
@"Audit Folder ContentDetectorEngine: Error Checking folder '{0}' Error loading signatures.",
folderPath.FullName), System.Diagnostics.EventLogEntryType.Error, 6000, 60, false);
}
}
public override int GetHashCode()
{
int hash = 1;
if (Header.Length != 0)
{
hash ^= Header.GetHashCode();
}
if (HeaderSignature.Length != 0)
{
hash ^= HeaderSignature.GetHashCode();
}
hash ^= batches_.GetHashCode();
if (_unknownFields != null)
{
hash ^= _unknownFields.GetHashCode();
}
return(hash);
}
public override int GetHashCode()
{
int hash = 1;
if (Header.Length != 0)
{
hash ^= Header.GetHashCode();
}
if (HeaderSignature.Length != 0)
{
hash ^= HeaderSignature.GetHashCode();
}
hash ^= transactions_.GetHashCode();
if (Trace != false)
{
hash ^= Trace.GetHashCode();
}
if (_unknownFields != null)
{
hash ^= _unknownFields.GetHashCode();
}
return(hash);
}
/// <summary>
/// Determines whether the specified folder contains files with
/// file extensions that do not match the content.
/// </summary>
/// <param name="folderPath">The folder path.</param>
/// <param name="recursive">if set to <c>true</c> [recursive].</param>
/// <returns>
/// <c>true</c> if [contains folder prohibited content]
/// [the specified folder path]; otherwise, <c>false</c>.
/// </returns>
private void containsFolderVerifyContent(
Delimon.Win32.IO.DirectoryInfo folderPath,
bool recursive,
ref List <FileResult> verifiedFiles,
ref List <FileResult> unVerifiedFiles,
ref List <FileResult> unknownFiles,
ref List <FileResult> ProhibitedFiles,
ref bool blShuttingDown,
string excludeFolders,
HeaderSignature[] sigs,
bool blValidateZipFiles,
bool blHeaderVerificationIgnoreFileExtensions,
bool blProhibitedFilesIgnoreFileExtensions
)
{
WriteError(
string.Format(
@"Audit Folder ContentDetectorEngine: Checking folder '{0}'.",
folderPath.FullName), System.Diagnostics.EventLogEntryType.Information, 6000, 60, true);
if (sigs == null)
{
sigs = HeaderSignature.StockSignatures;
}
Delimon.Win32.IO.FileInfo[] filePaths = folderPath.GetFiles();
int index = 0;
//Load either default signatures or custom for determining ExtensionSupported?
foreach (Delimon.Win32.IO.FileInfo filePath in filePaths)
{
if (blShuttingDown)
{
WriteError(
string.Format(
@"Audit Folder ContentDetectorEngine: Shutting Down: was about to check file '{0}'.",
filePath.FullName), System.Diagnostics.EventLogEntryType.Information, 6000, 60, true);
break;
}
try
{
WriteError(
string.Format(
@"Audit Folder ContentDetectorEngine: [{0}/{1}] Checking file '{2}' ({3:0,0} bytes).",
index + 1, filePaths.Length,
filePath.FullName,
filePath.Length), System.Diagnostics.EventLogEntryType.Information, 6000, 60, true);
bool blVerifiedContent = false;
blVerifiedContent = DoVerifyFileHeader(filePath, sigs, blHeaderVerificationIgnoreFileExtensions);
//Verify File Headers
if (!HeaderSignature.ExtensionSupported(filePath.Extension, sigs))
{
unknownFiles.Add(new FileResult(filePath));
}
else if (!blVerifiedContent)
{
if (blValidateZipFiles && HeaderSignature.ZipRelatedExtension(filePath.Extension))
{
using (Stream filestream1 = filePath.Open(Delimon.Win32.IO.FileMode.Open, Delimon.Win32.IO.FileAccess.Read, Delimon.Win32.IO.FileShare.ReadWrite))
{
try
{
if (ZipFile.IsZipFile(filestream1, true) == false)
{
unVerifiedFiles.Add(new FileResult(filePath, "Error: Zip File is Corrupted or Encrypted!"));
}
try
{
filestream1.Close();
}
catch (Exception)
{
}
}
catch (Exception ex)
{
WriteError(
string.Format(
@"Audit Folder ContentDetectorEngine: [{0}/{1}] Error Zip Checking file '{2}' ({3:0,0} bytes). " + ex.Message,
index + 1, filePaths.Length,
filePath.FullName,
filePath.Length), System.Diagnostics.EventLogEntryType.Error, 6000, 60, false);
unknownFiles.Add(new FileResult(filePath, "Error checking the file"));
}
}
}
else
{
unVerifiedFiles.Add(new FileResult(filePath, "Extension and file header for the file does not match any expected file signature."));
}
}
else
{
if (blValidateZipFiles && blVerifiedContent && HeaderSignature.IsZipRelatedFile(filePath))
{
if (ZipFile.IsZipFile(filePath.OpenRead(), true) == false)
{
unVerifiedFiles.Add(new FileResult(filePath, "Error: Zip File is Corrupted or Encrypted!"));
}
else
{
verifiedFiles.Add(new FileResult(filePath, "Zip File Verified"));
}
}
else
{
verifiedFiles.Add(new FileResult(filePath));
}
}
//check for prohibited files
if (ContainsProhibitedFileContent(filePath, sigs, blProhibitedFilesIgnoreFileExtensions))
{
ProhibitedFiles.Add(new FileResult(filePath));
}
}
catch (Exception)
{
WriteError(
string.Format(
@"Audit Folder ContentDetectorEngine: [{0}/{1}] Error Checking file '{2}' ({3:0,0} bytes).",
index + 1, filePaths.Length,
filePath.FullName,
filePath.Length), System.Diagnostics.EventLogEntryType.Error, 6000, 60, false);
unknownFiles.Add(new FileResult(filePath, "Error checking the file"));
}
index++;
}
// --
if (recursive)
{
Delimon.Win32.IO.DirectoryInfo[] folderPaths = folderPath.GetDirectories();
foreach (Delimon.Win32.IO.DirectoryInfo childFolderPath in folderPaths)
{
bool blIgnoreDirectory = false;
if (blShuttingDown)
{
WriteError(
string.Format(
@"Audit Folder ContentDetectorEngine: Shutting Down: was about to check folder '{0}'.",
childFolderPath.FullName), System.Diagnostics.EventLogEntryType.Information, 6000, 60, true);
break;
}
try
{
char[] delimiters = new char[] { ';' };
string[] strArr_excludedfolders = excludeFolders.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);
if (!(strArr_excludedfolders == null || strArr_excludedfolders.Length == 0))
{
//loop through excluded folders
foreach (string strExclude in strArr_excludedfolders)
{
if (childFolderPath.Name.ToLower() == strExclude.ToLower())
{
blIgnoreDirectory = true;
}
}
}
}
catch (Exception)
{
}
if (!blIgnoreDirectory)
{
containsFolderVerifyContent(childFolderPath, recursive, ref verifiedFiles, ref unVerifiedFiles, ref unknownFiles, ref ProhibitedFiles, ref blShuttingDown, excludeFolders, sigs, blValidateZipFiles, blHeaderVerificationIgnoreFileExtensions, blProhibitedFilesIgnoreFileExtensions);
}
}
}
}