/// <summary>
/// Read a message from an input stream. The message will be fully
/// contained in the first segment
/// </summary>
/// <param name="stream"> </param>
/// <exception cref="IOException"> </exception>
public virtual void getMessage(CryptoInputStream stream)
{
reset();
int length = stream.readLength();
if (length > available)
{
if (firstSegment != null)
{
firstSegment.zap();
}
available = 0;
extend(length);
}
int offset = 0;
while (offset < length)
{
int lengthRead = firstSegment.read(stream, length - offset);
if (lengthRead == -1)
{
throw new IOException("End of stream reached");
}
offset += lengthRead;
}
totalLength = length;
}
internal virtual int read(CryptoInputStream stream, int len)
{
int actualLength = stream.Read(buffer, length, Math.Min(buffer.Length - length, len));
if (actualLength < 0)
{
throw new IOException("End of stream reached");
}
length += actualLength;
return(actualLength);
}
/// <summary>
/// Create IOStreamPair of
/// <see cref="Org.Apache.Hadoop.Crypto.CryptoInputStream"/>
/// and
/// <see cref="Org.Apache.Hadoop.Crypto.CryptoOutputStream"/>
/// </summary>
/// <param name="conf">the configuration</param>
/// <param name="cipherOption">negotiated cipher option</param>
/// <param name="out">underlying output stream</param>
/// <param name="in">underlying input stream</param>
/// <param name="isServer">is server side</param>
/// <returns>IOStreamPair the stream pair</returns>
/// <exception cref="System.IO.IOException">for any error</exception>
public static IOStreamPair CreateStreamPair(Configuration conf, CipherOption cipherOption
, OutputStream @out, InputStream @in, bool isServer)
{
if (Log.IsDebugEnabled())
{
Log.Debug("Creating IOStreamPair of CryptoInputStream and " + "CryptoOutputStream."
);
}
CryptoCodec codec = CryptoCodec.GetInstance(conf, cipherOption.GetCipherSuite());
byte[] inKey = cipherOption.GetInKey();
byte[] inIv = cipherOption.GetInIv();
byte[] outKey = cipherOption.GetOutKey();
byte[] outIv = cipherOption.GetOutIv();
InputStream cIn = new CryptoInputStream(@in, codec, isServer ? inKey : outKey, isServer
? inIv : outIv);
OutputStream cOut = new CryptoOutputStream(@out, codec, isServer ? outKey : inKey
, isServer ? outIv : inIv);
return(new IOStreamPair(cIn, cOut));
}
/// <exception cref="System.IO.IOException"/>
public HdfsDataInputStream(CryptoInputStream @in)
: base(@in)
{
Preconditions.CheckArgument(@in.GetWrappedStream() is DFSInputStream, "CryptoInputStream should wrap a DFSInputStream"
);
}
