예제 #1
0
        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);
            }
        }
예제 #2
0
        /// <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);
            }
        }