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 AesXtsFile(OpenMode mode, IFile baseFile, string path, ReadOnlySpan <byte> kekSeed, ReadOnlySpan <byte> verificationKey, int blockSize) { Mode = mode; BaseFile = baseFile; Path = path; KekSeed = kekSeed.ToArray(); VerificationKey = verificationKey.ToArray(); BlockSize = blockSize; Header = new AesXtsFileHeader(BaseFile); if (!Header.TryDecryptHeader(Path, KekSeed, VerificationKey)) { ThrowHelper.ThrowResult(ResultFs.AesXtsFileHeaderInvalidKeys, "NAX0 key derivation failed."); } if (HeaderLength + Util.AlignUp(Header.Size, 0x10) > baseFile.GetSize()) { ThrowHelper.ThrowResult(ResultFs.AesXtsFileTooShort, "NAX0 key derivation failed."); } IStorage encStorage = BaseFile.AsStorage().Slice(HeaderLength, Util.AlignUp(Header.Size, 0x10)); BaseStorage = new CachedStorage(new Aes128XtsStorage(encStorage, Header.DecryptedKey1, Header.DecryptedKey2, BlockSize, true), 4, true); }
private void WriteXtsHeader(AesXtsFileHeader header, string filePath, string keyPath) { Debug.Assert(PathTools.IsNormalized(filePath.AsSpan())); Debug.Assert(PathTools.IsNormalized(keyPath.AsSpan())); header.EncryptHeader(keyPath, KekSource, ValidationKey); using (IFile file = BaseFileSystem.OpenFile(filePath, OpenMode.ReadWrite)) { file.Write(header.ToBytes(false), 0, WriteOption.Flush); } }
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)); } }
/// <summary> /// Creates a new <see cref="AesXtsFile"/> using the provided key. /// </summary> /// <param name="path">The full path of the file to create.</param> /// <param name="size">The initial size of the created file.</param> /// <param name="options">Flags to control how the file is created. /// Should usually be <see cref="CreateFileOptions.None"/></param> /// <param name="key">The 256-bit key containing a 128-bit data key followed by a 128-bit tweak key.</param> public void CreateFile(string path, long size, CreateFileOptions options, byte[] key) { long containerSize = AesXtsFile.HeaderLength + Util.AlignUp(size, 0x10); BaseFileSystem.CreateFile(path, containerSize, options); var header = new AesXtsFileHeader(key, size, path, KekSource, ValidationKey); using (IFile baseFile = BaseFileSystem.OpenFile(path, OpenMode.Write)) { baseFile.Write(header.ToBytes(false), 0); } }
public AesXtsFile(OpenMode mode, IFile baseFile, string path, ReadOnlySpan <byte> kekSeed, ReadOnlySpan <byte> verificationKey, int blockSize) { Mode = mode; BaseFile = baseFile; Path = path; KekSeed = kekSeed.ToArray(); VerificationKey = verificationKey.ToArray(); BlockSize = blockSize; Header = new AesXtsFileHeader(BaseFile); if (!Header.TryDecryptHeader(Path, KekSeed, VerificationKey)) { throw new ArgumentException("NAX0 key derivation failed."); } IStorage encStorage = BaseFile.AsStorage().Slice(HeaderLength, Util.AlignUp(Header.Size, 0x10)); BaseStorage = new CachedStorage(new Aes128XtsStorage(encStorage, Header.DecryptedKey1, Header.DecryptedKey2, BlockSize, true), 4, true); }
public void RenameFile(string srcPath, string dstPath) { srcPath = PathTools.Normalize(srcPath); dstPath = PathTools.Normalize(dstPath); AesXtsFileHeader header = ReadXtsHeader(srcPath, srcPath); BaseFileSystem.RenameFile(srcPath, dstPath); try { WriteXtsHeader(header, dstPath, dstPath); } catch (Exception) { BaseFileSystem.RenameFile(dstPath, srcPath); WriteXtsHeader(header, srcPath, srcPath); throw; } }