113 lines
3.1 KiB
C#
113 lines
3.1 KiB
C#
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using System;
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using System.IO;
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using System.IO.Compression;
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using System.Security.Cryptography;
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using UnityEngine;
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namespace ES3Internal
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{
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public static class ES3Stream
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{
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public static Stream CreateStream(ES3Settings settings, ES3FileMode fileMode)
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{
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bool flag = fileMode != ES3FileMode.Read;
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Stream stream = null;
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new FileInfo(settings.FullPath);
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try
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{
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if (settings.location == ES3.Location.InternalMS)
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{
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if (!flag)
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{
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return null;
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}
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stream = new MemoryStream(settings.bufferSize);
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}
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else if (settings.location == ES3.Location.File)
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{
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if (!flag && !ES3IO.FileExists(settings.FullPath))
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{
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return null;
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}
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stream = new ES3FileStream(settings.FullPath, fileMode, settings.bufferSize, useAsync: false);
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}
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else if (settings.location == ES3.Location.PlayerPrefs)
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{
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if (flag)
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{
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stream = new ES3PlayerPrefsStream(settings.FullPath, settings.bufferSize, fileMode == ES3FileMode.Append);
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}
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else
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{
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if (!PlayerPrefs.HasKey(settings.FullPath))
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{
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return null;
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}
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stream = new ES3PlayerPrefsStream(settings.FullPath);
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}
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}
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else if (settings.location == ES3.Location.Resources)
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{
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if (flag)
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{
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if (Application.isEditor)
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{
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throw new NotSupportedException("Cannot write directly to Resources folder. Try writing to a directory outside of Resources, and then manually move the file there.");
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}
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throw new NotSupportedException("Cannot write to Resources folder at runtime. Use a different save location at runtime instead.");
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}
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ES3ResourcesStream eS3ResourcesStream = new ES3ResourcesStream(settings.FullPath);
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if (!eS3ResourcesStream.Exists)
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{
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eS3ResourcesStream.Dispose();
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return null;
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}
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stream = eS3ResourcesStream;
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}
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return CreateStream(stream, settings, fileMode);
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}
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catch (Exception ex)
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{
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stream?.Dispose();
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throw ex;
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}
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}
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public static Stream CreateStream(Stream stream, ES3Settings settings, ES3FileMode fileMode)
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{
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try
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{
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bool flag = fileMode != ES3FileMode.Read;
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if (settings.encryptionType != 0 && stream.GetType() != typeof(UnbufferedCryptoStream))
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{
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EncryptionAlgorithm alg = null;
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if (settings.encryptionType == ES3.EncryptionType.AES)
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{
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alg = new AESEncryptionAlgorithm();
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}
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stream = new UnbufferedCryptoStream(stream, !flag, settings.encryptionPassword, settings.bufferSize, alg);
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}
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if (settings.compressionType != 0 && stream.GetType() != typeof(GZipStream) && settings.compressionType == ES3.CompressionType.Gzip)
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{
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stream = (flag ? new GZipStream(stream, CompressionMode.Compress) : new GZipStream(stream, CompressionMode.Decompress));
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}
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return stream;
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}
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catch (Exception ex)
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{
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stream?.Dispose();
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if (ex.GetType() == typeof(CryptographicException))
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{
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throw new CryptographicException("Could not decrypt file. Please ensure that you are using the same password used to encrypt the file.");
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}
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throw ex;
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}
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}
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public static void CopyTo(Stream source, Stream destination)
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{
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source.CopyTo(destination);
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}
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}
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}
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