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Implement RenameDirectory for AesXtsFileSystem

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This commit is contained in:
Alex Barney 2019-03-26 21:59:52 -05:00
parent 6e6c060e25
commit dc2bd08823
1 changed files with 72 additions and 18 deletions
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90
src/LibHac/IO/AesXtsFileSystem.cs
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@ -92,7 +92,54 @@ namespace LibHac.IO
public void RenameDirectory(string srcPath, string dstPath)
{
throw new NotImplementedException();
srcPath = PathTools.Normalize(srcPath);
dstPath = PathTools.Normalize(dstPath);
BaseFileSystem.RenameDirectory(srcPath, dstPath);
try
{
RenameDirectoryImpl(srcPath, dstPath, false);
}
catch (Exception)
{
RenameDirectoryImpl(srcPath, dstPath, true);
BaseFileSystem.RenameDirectory(dstPath, srcPath);
throw;
}
}
private void RenameDirectoryImpl(string srcDir, string dstDir, bool doRollback)
{
IDirectory dir = OpenDirectory(dstDir, OpenDirectoryMode.All);
foreach (DirectoryEntry entry in dir.Read())
{
string subSrcPath = $"{srcDir}/{entry.Name}";
string subDstPath = $"{dstDir}/{entry.Name}";
if (entry.Type == DirectoryEntryType.Directory)
{
RenameDirectoryImpl(subSrcPath, subDstPath, doRollback);
}
if (entry.Type == DirectoryEntryType.File)
{
if (doRollback)
{
if (TryReadXtsHeader(subDstPath, subDstPath, out AesXtsFileHeader header))
{
WriteXtsHeader(header, subDstPath, subSrcPath);
}
}
else
{
AesXtsFileHeader header = ReadXtsHeader(subDstPath, subSrcPath);
WriteXtsHeader(header, subDstPath, subDstPath);
}
}
}
}
public void RenameFile(string srcPath, string dstPath)
@ -100,18 +147,18 @@ namespace LibHac.IO
srcPath = PathTools.Normalize(srcPath);
dstPath = PathTools.Normalize(dstPath);
AesXtsFileHeader header = ReadXtsHeader(srcPath);
AesXtsFileHeader header = ReadXtsHeader(srcPath, srcPath);
BaseFileSystem.RenameFile(srcPath, dstPath);
try
{
WriteXtsHeader(header, dstPath);
WriteXtsHeader(header, dstPath, dstPath);
}
catch (Exception)
{
BaseFileSystem.RenameFile(dstPath, srcPath);
WriteXtsHeader(header, srcPath);
WriteXtsHeader(header, srcPath, srcPath);
throw;
}
@ -137,30 +184,37 @@ namespace LibHac.IO
BaseFileSystem.Commit();
}
private AesXtsFileHeader ReadXtsHeader(string path)
private AesXtsFileHeader ReadXtsHeader(string filePath, string keyPath)
{
Debug.Assert(PathTools.IsNormalized(path.AsSpan()));
using (IFile file = BaseFileSystem.OpenFile(path, OpenMode.Read))
if (!TryReadXtsHeader(filePath, keyPath, out AesXtsFileHeader header))
{
var header = new AesXtsFileHeader(file);
throw new InvalidDataException("Could not decrypt AES-XTS keys");
}
if (!header.TryDecryptHeader(path, KekSource, ValidationKey))
{
throw new InvalidDataException("Could not decrypt AES-XTS keys");
}
return header;
}
return header;
private bool TryReadXtsHeader(string filePath, string keyPath, out AesXtsFileHeader header)
{
Debug.Assert(PathTools.IsNormalized(filePath.AsSpan()));
Debug.Assert(PathTools.IsNormalized(keyPath.AsSpan()));
using (IFile file = BaseFileSystem.OpenFile(filePath, OpenMode.Read))
{
header = new AesXtsFileHeader(file);
return header.TryDecryptHeader(keyPath, KekSource, ValidationKey);
}
}
private void WriteXtsHeader(AesXtsFileHeader header, string path)
private void WriteXtsHeader(AesXtsFileHeader header, string filePath, string keyPath)
{
Debug.Assert(PathTools.IsNormalized(path.AsSpan()));
Debug.Assert(PathTools.IsNormalized(filePath.AsSpan()));
Debug.Assert(PathTools.IsNormalized(keyPath.AsSpan()));
header.EncryptHeader(path, KekSource, ValidationKey);
header.EncryptHeader(keyPath, KekSource, ValidationKey);
using (IFile file = BaseFileSystem.OpenFile(path, OpenMode.ReadWrite))
using (IFile file = BaseFileSystem.OpenFile(filePath, OpenMode.ReadWrite))
{
file.Write(header.ToBytes(false), 0);
}