private void CreateStreams(string filePath, string streamName, FileMode fileMode, FileAccess fileAccess, FileShare fileShare, Encoding fileEncoding)
{
if (File.Exists(filePath) && (this.provider.Force != 0))
{
this.oldAttributes = File.GetAttributes(filePath);
this.haveOldAttributes = true;
System.IO.FileAttributes hidden = System.IO.FileAttributes.Hidden;
if ((fileAccess & FileAccess.Write) != 0)
{
hidden |= System.IO.FileAttributes.ReadOnly;
}
File.SetAttributes(this.path, File.GetAttributes(filePath) & ~hidden);
}
FileAccess access = fileAccess;
if ((fileAccess & FileAccess.Write) != 0)
{
fileAccess = FileAccess.ReadWrite;
}
try
{
if (!string.IsNullOrEmpty(streamName))
{
this.stream = AlternateDataStreamUtilities.CreateFileStream(filePath, streamName, fileMode, fileAccess, fileShare);
}
else
{
this.stream = new FileStream(filePath, fileMode, fileAccess, fileShare);
}
}
catch (IOException)
{
if (!string.IsNullOrEmpty(streamName))
{
this.stream = AlternateDataStreamUtilities.CreateFileStream(filePath, streamName, fileMode, access, fileShare);
}
else
{
this.stream = new FileStream(filePath, fileMode, access, fileShare);
}
}
if (!this.usingByteEncoding)
{
if ((fileAccess & FileAccess.Read) != 0)
{
this.reader = new StreamReader(this.stream, fileEncoding);
this._backReader = new FileStreamBackReader(this.stream, fileEncoding);
}
if ((fileAccess & FileAccess.Write) != 0)
{
if ((this.reader != null) && ((fileAccess & FileAccess.Read) != 0))
{
this.reader.Peek();
fileEncoding = this.reader.CurrentEncoding;
}
this.writer = new StreamWriter(this.stream, fileEncoding);
}
}
}
/// <summary>
/// Generate the type(s)
/// </summary>
protected override void ProcessRecord()
{
List <string> pathsToProcess = new List <string>();
ProviderInfo provider = null;
if (String.Equals(this.ParameterSetName, "ByLiteralPath", StringComparison.OrdinalIgnoreCase))
{
foreach (string path in _paths)
{
string newPath = Context.SessionState.Path.GetUnresolvedProviderPathFromPSPath(path);
if (IsValidFileForUnblocking(newPath))
{
pathsToProcess.Add(newPath);
}
}
}
else
{
// Resolve paths
foreach (string path in _paths)
{
try
{
Collection <string> newPaths = Context.SessionState.Path.GetResolvedProviderPathFromPSPath(path, out provider);
foreach (string currentFilepath in newPaths)
{
if (IsValidFileForUnblocking(currentFilepath))
{
pathsToProcess.Add(currentFilepath);
}
}
}
catch (ItemNotFoundException e)
{
if (!WildcardPattern.ContainsWildcardCharacters(path))
{
ErrorRecord errorRecord = new ErrorRecord(e,
"FileNotFound",
ErrorCategory.ObjectNotFound,
path);
WriteError(errorRecord);
}
}
}
}
// Unblock files
foreach (string path in pathsToProcess)
{
if (ShouldProcess(path))
{
AlternateDataStreamUtilities.DeleteFileStream(path, "Zone.Identifier");
}
}
}
/// <summary>
/// Read the 'Zone.Identifier' alternate data stream to determin SecurityZone of the file.
/// </summary>
private static SecurityZone ReadFromZoneIdentifierDataStream(string filePath)
{
if (!AlternateDataStreamUtilities.TryCreateFileStream(filePath, "Zone.Identifier", FileMode.Open, FileAccess.Read, FileShare.Read, out var zoneDataStream))
{
return(SecurityZone.NoZone);
}
// If we successfully get the zone data stream, try to read the ZoneId information
using (StreamReader zoneDataReader = new StreamReader(zoneDataStream, GetDefaultEncoding()))
{
string line = null;
bool zoneTransferMatched = false;
// After a lot experiments with Zone.CreateFromUrl/Zone.SecurityZone, the way it handles the alternate
// data stream 'Zone.Identifier' is observed as follows:
// 1. Read content of the data stream line by line. Each line is trimmed.
// 2. Try to match the current line with '^\[ZoneTransfer\]'.
// - if matching, then do step #3 starting from the next line
// - if not matching, then continue to do step #2 with the next line.
// 3. Try to match the current line with '^ZoneId\s*=\s*(.*)'
// - if matching, check if the ZoneId is valid. Then return the corresponding SecurityZone if valid, or 'NoZone' if invalid.
// - if not matching, then continue to do step #3 with the next line.
// 4. Reach EOF, then return 'NoZone'.
while ((line = zoneDataReader.ReadLine()) != null)
{
line = line.Trim();
if (!zoneTransferMatched)
{
zoneTransferMatched = Regex.IsMatch(line, @"^\[ZoneTransfer\]", RegexOptions.IgnoreCase);
}
else
{
Match match = Regex.Match(line, @"^ZoneId\s*=\s*(.*)", RegexOptions.IgnoreCase);
if (!match.Success)
{
continue;
}
// Match found. Validate ZoneId value.
string zoneIdRawValue = match.Groups[1].Value;
match = Regex.Match(zoneIdRawValue, @"^[+-]?\d+", RegexOptions.IgnoreCase);
if (!match.Success)
{
return(SecurityZone.NoZone);
}
string zoneId = match.Groups[0].Value;
SecurityZone result;
return(LanguagePrimitives.TryConvertTo(zoneId, out result) ? result : SecurityZone.NoZone);
}
}
}
return(SecurityZone.NoZone);
}
protected override void ProcessRecord()
{
List <string> list = new List <string>();
ProviderInfo provider = null;
if (string.Equals(base.ParameterSetName, "ByLiteralPath", StringComparison.OrdinalIgnoreCase))
{
foreach (string str in this.paths)
{
string unresolvedProviderPathFromPSPath = base.Context.SessionState.Path.GetUnresolvedProviderPathFromPSPath(str);
if (this.IsValidFileForUnblocking(unresolvedProviderPathFromPSPath))
{
list.Add(unresolvedProviderPathFromPSPath);
}
}
}
else
{
foreach (string str3 in this.paths)
{
try
{
foreach (string str4 in base.Context.SessionState.Path.GetResolvedProviderPathFromPSPath(str3, out provider))
{
if (this.IsValidFileForUnblocking(str4))
{
list.Add(str4);
}
}
}
catch (ItemNotFoundException exception)
{
if (!WildcardPattern.ContainsWildcardCharacters(str3))
{
ErrorRecord errorRecord = new ErrorRecord(exception, "FileNotFound", ErrorCategory.ObjectNotFound, str3);
base.WriteError(errorRecord);
}
}
}
}
foreach (string str5 in list)
{
if (base.ShouldProcess(str5))
{
AlternateDataStreamUtilities.DeleteFileStream(str5, "Zone.Identifier");
}
}
}
/// <summary>
/// Generate the type(s)
/// </summary>
protected override void ProcessRecord()
{
List <string> pathsToProcess = new();
ProviderInfo provider = null;
if (string.Equals(this.ParameterSetName, "ByLiteralPath", StringComparison.OrdinalIgnoreCase))
{
foreach (string path in _paths)
{
string newPath = Context.SessionState.Path.GetUnresolvedProviderPathFromPSPath(path);
if (IsValidFileForUnblocking(newPath))
{
pathsToProcess.Add(newPath);
}
}
}
else
{
// Resolve paths
foreach (string path in _paths)
{
try
{
Collection <string> newPaths = Context.SessionState.Path.GetResolvedProviderPathFromPSPath(path, out provider);
foreach (string currentFilepath in newPaths)
{
if (IsValidFileForUnblocking(currentFilepath))
{
pathsToProcess.Add(currentFilepath);
}
}
}
catch (ItemNotFoundException e)
{
if (!WildcardPattern.ContainsWildcardCharacters(path))
{
ErrorRecord errorRecord = new(e,
"FileNotFound",
ErrorCategory.ObjectNotFound,
path);
WriteError(errorRecord);
}
}
}
}
#if !UNIX
// Unblock files
foreach (string path in pathsToProcess)
{
if (ShouldProcess(path))
{
try
{
AlternateDataStreamUtilities.DeleteFileStream(path, "Zone.Identifier");
}
catch (Exception e)
{
WriteError(new ErrorRecord(exception: e, errorId: "RemoveItemUnableToAccessFile", ErrorCategory.ResourceUnavailable, targetObject: path));
}
}
}
#else
if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
string errorMessage = UnblockFileStrings.LinuxNotSupported;
Exception e = new PlatformNotSupportedException(errorMessage);
ThrowTerminatingError(new ErrorRecord(exception: e, errorId: "LinuxNotSupported", ErrorCategory.NotImplemented, targetObject: null));
return;
}
foreach (string path in pathsToProcess)
{
if (IsBlocked(path))
{
UInt32 result = RemoveXattr(path, MacBlockAttribute, RemovexattrFollowSymLink);
if (result != 0)
{
string errorMessage = string.Format(CultureInfo.CurrentUICulture, UnblockFileStrings.UnblockError, path);
Exception e = new InvalidOperationException(errorMessage);
WriteError(new ErrorRecord(exception: e, errorId: "UnblockError", ErrorCategory.InvalidResult, targetObject: path));
}
}
}
#endif
}
/// <summary>
/// Generate the type(s)
/// </summary>
protected override void ProcessRecord()
{
List <string> pathsToProcess = new List <string>();
ProviderInfo provider = null;
if (String.Equals(this.ParameterSetName, "ByLiteralPath", StringComparison.OrdinalIgnoreCase))
{
foreach (string path in _paths)
{
string newPath = Context.SessionState.Path.GetUnresolvedProviderPathFromPSPath(path);
if (IsValidFileForUnblocking(newPath))
{
pathsToProcess.Add(newPath);
}
}
}
else
{
// Resolve paths
foreach (string path in _paths)
{
try
{
Collection <string> newPaths = Context.SessionState.Path.GetResolvedProviderPathFromPSPath(path, out provider);
foreach (string currentFilepath in newPaths)
{
if (IsValidFileForUnblocking(currentFilepath))
{
pathsToProcess.Add(currentFilepath);
}
}
}
catch (ItemNotFoundException e)
{
if (!WildcardPattern.ContainsWildcardCharacters(path))
{
ErrorRecord errorRecord = new ErrorRecord(e,
"FileNotFound",
ErrorCategory.ObjectNotFound,
path);
WriteError(errorRecord);
}
}
}
}
// Unblock files
foreach (string path in pathsToProcess)
{
if (ShouldProcess(path))
{
try
{
AlternateDataStreamUtilities.DeleteFileStream(path, "Zone.Identifier");
}
catch (Win32Exception accessException)
{
// NativeErrorCode=2 - File not found.
// If the block stream not found the 'path' was not blocked and we successfully return.
if (accessException.NativeErrorCode != 2)
{
WriteError(new ErrorRecord(accessException, "RemoveItemUnauthorizedAccessError", ErrorCategory.PermissionDenied, path));
}
else
{
WriteVerbose(StringUtil.Format(UtilityCommonStrings.NoZoneIdentifierFileStream, path));
}
}
}
}
}
