/// <summary>
/// 使用指定算法解密,通过回调返回解密后的数据.
/// </summary>
/// <param name="options"></param>
/// command.arguments:
/// - 1 sKey 密钥
/// - 2 sourceData 需要解密的数据
/// - 3 jsOptions 需要解密的数据可选参数
/// - 1 CryptAlgorithm 加密算法，默认des
/// - 2 EncodeDataType 数据编码格式，默认base64
/// - 3 kKeyForEncodeKeyType 密钥编码格式，默认16进制
public void decrypt(string options)
{
string sKey = string.Empty;
string sourceDataStr = string.Empty;
string[] args = JSON.JsonHelper.Deserialize<string[]>(options);
sKey = args[0];
sourceDataStr = args[1];
SecurityOptions option = new SecurityOptions();
if (args.Length > 2 && null != args[2])
{
option = JSON.JsonHelper.Deserialize<SecurityOptions>(args[2]);
}
if (null == option)
{
option = new SecurityOptions();
}
//check
if (string.IsNullOrEmpty(sKey) || sKey.Length < 8 || string.IsNullOrEmpty(sourceDataStr))
{
XLog.WriteError("Input data invalid!");
DispatchCommandResult(new PluginResult(PluginResult.Status.ERROR));
return;
}
try
{
var keyData = StringToData(sKey, option.EncodeKeyType);
keyData = MakeKey(keyData, option.CryptAlgorithm);
var sourceData = StringToData(sourceDataStr, option.EncodeDataType);
byte[] result = Decrypt(keyData, sourceData, option.CryptAlgorithm);
DispatchCommandResult(new PluginResult(PluginResult.Status.OK, Encoding.UTF8.GetString(result, 0, result.Length)));
}
catch (Exception ex)
{
if (ex is FormatException || ex is ArgumentNullException || ex is ArgumentException || ex is ArgumentOutOfRangeException || ex is NotSupportedException)
{
XLog.WriteError("decrypt data error with Exception : " + ex.Message);
DispatchCommandResult(new PluginResult(PluginResult.Status.ERROR));
}
}
}
private void DoFileCrypt(bool encrypt, string options)
{
string sKey = string.Empty;
string sourceFilePath = string.Empty;
string targetFilePath = string.Empty;
string[] args = JSON.JsonHelper.Deserialize<string[]>(options);
sKey = args[0];
sourceFilePath = args[1];
targetFilePath = args[2];
SecurityOptions option = new SecurityOptions();
if (args.Length > 3 && null != args[3])
{
option = JSON.JsonHelper.Deserialize<SecurityOptions>(args[3]);
}
if (null == option)
{
option = new SecurityOptions();
}
//check
if (string.IsNullOrEmpty(sKey) || sKey.Length < 8)
{
XLog.WriteError("Input data invalid!");
DispatchCommandResult(new PluginResult(PluginResult.Status.ERROR));
return;
}
string appWorkSpace = this.app.GetWorkSpace();
sourceFilePath = XUtils.ResolvePath(appWorkSpace, sourceFilePath);
string targetPath = targetFilePath;
targetFilePath = XUtils.ResolvePath(appWorkSpace, targetFilePath);
//path_error
if ( string.IsNullOrEmpty(sourceFilePath) || string.IsNullOrEmpty(targetFilePath)
|| appWorkSpace.Equals(sourceFilePath) || appWorkSpace.Equals(targetFilePath))
{
XLog.WriteError("Input data invalid path error!");
DispatchCommandResult(new PluginResult(PluginResult.Status.ERROR, SecurityError.PATH_ERR));
return;
}
//资源文件不存在
using (IsolatedStorageFile isoFile = IsolatedStorageFile.GetUserStoreForApplication())
{
if (!isoFile.FileExists(sourceFilePath))
{
XLog.WriteError(sourceFilePath + ": not_found_error!");
DispatchCommandResult(new PluginResult(PluginResult.Status.ERROR, SecurityError.FILE_NOT_FOUND_ERR));
return;
}
}
try
{
var keyData = StringToData(sKey, option.EncodeKeyType);
keyData = MakeKey(keyData, option.CryptAlgorithm);
using (IsolatedStorageFile isoFile = IsolatedStorageFile.GetUserStoreForApplication())
{
using (Stream sourceStream = isoFile.OpenFile(sourceFilePath, FileMode.Open, FileAccess.Read))
{
using (FileStream fileStream = new IsolatedStorageFileStream(targetFilePath, FileMode.OpenOrCreate, isoFile))
{
using (BinaryWriter writer = new BinaryWriter(fileStream))
{
int streamLength = (int)sourceStream.Length;
byte[] fileData = new byte[streamLength];
sourceStream.Read(fileData, 0, streamLength);
byte[] result = null;
if (encrypt)
{
result = Encrypt(keyData, fileData, option.CryptAlgorithm);
}
else
{
result = Decrypt(keyData, fileData, option.CryptAlgorithm);
}
writer.Write(result);
}
}
}
}
//返回加密后文件路径
DispatchCommandResult(new PluginResult(PluginResult.Status.OK, targetPath));
}
catch (Exception ex)
{
if (ex is FormatException || ex is ArgumentNullException || ex is ArgumentException || ex is ArgumentOutOfRangeException || ex is NotSupportedException || ex is IsolatedStorageException)
{
string operation = encrypt ? "encrypt" : "decrypt";
XLog.WriteError("DoFileCrypt " + operation + " error with Exception : " + ex.Message);
DispatchCommandResult(new PluginResult(PluginResult.Status.ERROR, SecurityError.OPERATION_ERR));
return;
}
throw ex;
}
}
