/// <summary>
/// Decompresses the specified bytes
/// </summary>
/// <param name="compressedBytes"></param>
/// <returns></returns>
public static byte[] DecompressData(byte[] compressedBytes)
{
ByteArrayBuilder builder = new ByteArrayBuilder();
try
{
MemoryStream ms = new MemoryStream(compressedBytes);
ZipInputStream zipStream = new ZipInputStream(ms);
const int CHUNK_SIZE = 10240;
ZipEntry entry = zipStream.GetNextEntry();
if (entry != null)
{
int bytesRead = 0;
do
{
byte[] chunk = new byte[CHUNK_SIZE];
bytesRead = zipStream.Read(chunk, 0, CHUNK_SIZE);
builder.AddChunkReference(chunk, bytesRead);
}while (bytesRead > 0);
}
}
catch (Exception ex)
{
SdkSettings.Instance.Logger.Log(TraceLevel.Warning, "Utils : DecompressData - Zip Exception: '{0}'", ex.Message);
}
return(builder.ToArray());
}
/// <summary>
/// Decrypts a from encrypted bytes
/// </summary>
/// <param name="bytes"></param>
/// <returns></returns>
public static byte[] Decrypt(byte[] bytes)
{
ByteArrayBuilder result = new ByteArrayBuilder();
try
{
RijndaelManaged rijndael = InitRijndael();
ICryptoTransform decryptor = rijndael.CreateDecryptor(rijndael.Key, rijndael.IV);
using (MemoryStream msDecrypt = new MemoryStream(bytes))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (BinaryReader srDecrypt = new BinaryReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
int readBytes = 0;
do
{
byte[] buffer = new byte[READ_BUFFER_SIZE];
readBytes = srDecrypt.Read(buffer, 0, READ_BUFFER_SIZE);
if (readBytes > 0)
{
result.AddChunkReference(buffer, readBytes);
}
}while (readBytes != 0);
}
}
rijndael.Clear();
}
}
catch { };
return(result.ToArray());
}
