| private FinishRead ( byte renegotiateBuffer ) : void | ||
| renegotiateBuffer | byte | |
| return | void | |
//
// Combined sync/async read method. For sync request asyncRequest==null.
//
private int ProcessRead(byte[] buffer, int offset, int count, BufferAsyncResult asyncResult)
{
ValidateParameters(buffer, offset, count);
if (Interlocked.Exchange(ref _nestedRead, 1) == 1)
{
throw new NotSupportedException(SR.Format(SR.net_io_invalidnestedcall, (asyncResult != null? "BeginRead":"Read"), "read"));
}
// If this is an async operation, get the AsyncProtocolRequest to use.
// We do this only after we verify we're the sole write operation in flight.
AsyncProtocolRequest asyncRequest = GetOrCreateProtocolRequest(ref _readProtocolRequest, asyncResult);
bool failed = false;
try
{
int copyBytes;
if (InternalBufferCount != 0)
{
copyBytes = InternalBufferCount > count ? count : InternalBufferCount;
if (copyBytes != 0)
{
Buffer.BlockCopy(InternalBuffer, InternalOffset, buffer, offset, copyBytes);
SkipBytes(copyBytes);
}
asyncRequest?.CompleteUser(copyBytes);
return(copyBytes);
}
return(StartReading(buffer, offset, count, asyncRequest));
}
catch (Exception e)
{
_sslState.FinishRead(null);
failed = true;
if (e is IOException)
{
throw;
}
throw new IOException(SR.net_io_read, e);
}
finally
{
if (asyncRequest == null || failed)
{
_nestedRead = 0;
}
}
}
//
// Combined sync/async read method. For sync request asyncRequest==null
// There is a little overhead because we need to pass buffer/offset/count used only in sync.
// Still the benefit is that we have a common sync/async code path.
//
private int ProcessRead(byte[] buffer, int offset, int count, AsyncProtocolRequest asyncRequest)
{
ValidateParameters(buffer, offset, count);
if (Interlocked.Exchange(ref _NestedRead, 1) == 1)
{
throw new NotSupportedException(SR.Format(SR.net_io_invalidnestedcall, (asyncRequest != null ? "BeginRead" : "Read"), "read"));
}
bool failed = false;
try
{
int copyBytes;
if (InternalBufferCount != 0)
{
copyBytes = InternalBufferCount > count ? count : InternalBufferCount;
if (copyBytes != 0)
{
Buffer.BlockCopy(InternalBuffer, InternalOffset, buffer, offset, copyBytes);
SkipBytes(copyBytes);
}
if (asyncRequest != null)
{
asyncRequest.CompleteUser((object)copyBytes);
}
return(copyBytes);
}
return(StartReading(buffer, offset, count, asyncRequest));
}
catch (Exception e)
{
_SslState.FinishRead(null);
failed = true;
if (e is IOException)
{
throw;
}
throw new IOException(SR.net_io_read, e);
}
finally
{
// If sync request or exception.
if (asyncRequest == null || failed)
{
_NestedRead = 0;
}
}
}
//
// Sync read method.
//
private int ProcessRead(byte[] buffer, int offset, int count)
{
ValidateParameters(buffer, offset, count);
if (Interlocked.Exchange(ref _NestedRead, 1) == 1)
{
throw new NotSupportedException(SR.Format(SR.net_io_invalidnestedcall, "Read", "read"));
}
try
{
int copyBytes;
if (InternalBufferCount != 0)
{
copyBytes = InternalBufferCount > count ? count : InternalBufferCount;
if (copyBytes != 0)
{
Buffer.BlockCopy(InternalBuffer, InternalOffset, buffer, offset, copyBytes);
SkipBytes(copyBytes);
}
return(copyBytes);
}
return(StartReading(buffer, offset, count));
}
catch (Exception e)
{
_SslState.FinishRead(null);
if (e is IOException)
{
throw;
}
throw new IOException(SR.net_io_read, e);
}
finally
{
_NestedRead = 0;
}
}
private async ValueTask <int> ReadAsyncInternal <TReadAdapter>(TReadAdapter adapter, Memory <byte> buffer)
where TReadAdapter : ISslReadAdapter
{
if (Interlocked.Exchange(ref _nestedRead, 1) == 1)
{
throw new NotSupportedException(SR.Format(SR.net_io_invalidnestedcall, nameof(ReadAsync), "read"));
}
while (true)
{
int copyBytes;
if (_decryptedBytesCount != 0)
{
copyBytes = CopyDecryptedData(buffer);
_sslState.FinishRead(null);
_nestedRead = 0;
return(copyBytes);
}
copyBytes = await adapter.LockAsync(buffer).ConfigureAwait(false);
try
{
if (copyBytes > 0)
{
return(copyBytes);
}
ResetReadBuffer();
int readBytes = await FillBufferAsync(adapter, SecureChannel.ReadHeaderSize).ConfigureAwait(false);
if (readBytes == 0)
{
return(0);
}
int payloadBytes = _sslState.GetRemainingFrameSize(_internalBuffer, _internalOffset, readBytes);
if (payloadBytes < 0)
{
throw new IOException(SR.net_frame_read_size);
}
readBytes = await FillBufferAsync(adapter, SecureChannel.ReadHeaderSize + payloadBytes).ConfigureAwait(false);
if (readBytes < 0)
{
throw new IOException(SR.net_frame_read_size);
}
// At this point, readBytes contains the size of the header plus body.
// Set _decrytpedBytesOffset/Count to the current frame we have (including header)
// DecryptData will decrypt in-place and modify these to point to the actual decrypted data, which may be smaller.
_decryptedBytesOffset = _internalOffset;
_decryptedBytesCount = readBytes;
SecurityStatusPal status = _sslState.DecryptData(_internalBuffer, ref _decryptedBytesOffset, ref _decryptedBytesCount);
// Treat the bytes we just decrypted as consumed
// Note, we won't do another buffer read until the decrypted bytes are processed
ConsumeBufferedBytes(readBytes);
if (status.ErrorCode != SecurityStatusPalErrorCode.OK)
{
byte[] extraBuffer = null;
if (_decryptedBytesCount != 0)
{
extraBuffer = new byte[_decryptedBytesCount];
Buffer.BlockCopy(_internalBuffer, _decryptedBytesOffset, extraBuffer, 0, _decryptedBytesCount);
_decryptedBytesCount = 0;
}
ProtocolToken message = new ProtocolToken(null, status);
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(null, $"***Processing an error Status = {message.Status}");
}
if (message.Renegotiate)
{
if (!_sslState._sslAuthenticationOptions.AllowRenegotiation)
{
throw new IOException(SR.net_ssl_io_renego);
}
_sslState.ReplyOnReAuthentication(extraBuffer);
// Loop on read.
return(-1);
}
if (message.CloseConnection)
{
_sslState.FinishRead(null);
return(0);
}
throw new IOException(SR.net_io_decrypt, message.GetException());
}
}
catch (Exception e)
{
_sslState.FinishRead(null);
if (e is IOException)
{
throw;
}
throw new IOException(SR.net_io_read, e);
}
finally
{
_nestedRead = 0;
}
}
}