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@ -52,54 +52,46 @@ impl<T: 'static + AsyncRead + Send + Sync + Unpin> AsyncRead for EncryptedReadSt
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buf: &mut ReadBuf<'_>,
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) -> Poll<std::io::Result<()>> {
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if self.fut.is_none() {
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let max_copy = min(buf.remaining(), self.remaining.len());
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let bytes = self.remaining.copy_to_bytes(max_copy);
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buf.put_slice(&bytes);
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if self.remaining.len() > 0 {
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let max_copy = min(buf.remaining(), self.remaining.len());
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let bytes = self.remaining.copy_to_bytes(max_copy);
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buf.put_slice(&bytes);
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tracing::trace!("{} bytes read from buffer", bytes.len());
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}
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if buf.remaining() > 0 {
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let mut reader = self.inner.take().unwrap();
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tracing::trace!("{} bytes remaining to read", buf.remaining());
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let reader = self.inner.take().unwrap();
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let cipher = self.cipher.take().unwrap();
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self.fut = Some(Box::pin(async move {
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let package = match EncryptedPackage::from_async_read(&mut reader).await {
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Ok(p) => p,
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Err(e) => {
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return (Err(e), reader, cipher);
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}
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};
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match cipher.decrypt(package.into_inner()) {
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Ok(bytes) => (Ok(bytes), reader, cipher),
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Err(e) => (Err(e), reader, cipher),
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}
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}));
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self.fut = Some(Box::pin(async move { read_bytes(reader, cipher).await }));
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} else {
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return Poll::Ready(Ok(()));
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}
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}
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if self.fut.is_some() {
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match self.fut.as_mut().unwrap().as_mut().poll(cx) {
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Poll::Ready((result, reader, cipher)) => {
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self.inner = Some(reader);
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self.cipher = Some(cipher);
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match result {
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Ok(bytes) => {
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self.remaining.put(bytes);
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let max_copy = min(self.remaining.len(), buf.remaining());
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let bytes = self.remaining.copy_to_bytes(max_copy);
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self.fut = None;
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buf.put_slice(&bytes);
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if buf.remaining() == 0 {
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Poll::Ready(Ok(()))
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} else {
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Poll::Pending
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}
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match self.fut.as_mut().unwrap().as_mut().poll(cx) {
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Poll::Ready((result, reader, cipher)) => {
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self.inner = Some(reader);
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self.cipher = Some(cipher);
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match result {
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Ok(bytes) => {
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self.fut = None;
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self.remaining.put(bytes);
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let max_copy = min(self.remaining.len(), buf.remaining());
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let bytes = self.remaining.copy_to_bytes(max_copy);
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buf.put_slice(&bytes);
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tracing::trace!("{} bytes read from buffer", bytes.len());
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if buf.remaining() == 0 {
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Poll::Ready(Ok(()))
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} else {
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Poll::Pending
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}
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Err(e) => Poll::Ready(Err(e)),
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}
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Err(e) => Poll::Ready(Err(e)),
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}
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Poll::Pending => Poll::Pending,
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}
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} else {
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Poll::Ready(Ok(()))
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Poll::Pending => Poll::Pending,
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}
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}
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}
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@ -112,11 +104,13 @@ impl<T: 'static + AsyncWrite + Unpin + Send + Sync> AsyncWrite for EncryptedWrit
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cx: &mut Context<'_>,
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buf: &[u8],
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) -> Poll<Result<usize, Error>> {
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if buf.remaining() > 0 {
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let buf = unsafe { std::mem::transmute::<_, &'static [u8]>(buf) };
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self.buffer.put(Bytes::from(buf));
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let written_length = buf.len();
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if self.fut_write.is_none() {
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self.buffer.put(Bytes::from(buf.to_vec()));
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if self.fut_write.is_none() && self.buffer.len() >= WRITE_BUF_SIZE {
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if self.buffer.len() >= WRITE_BUF_SIZE {
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tracing::trace!("buffer has reached sending size: {}", self.buffer.len());
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let buffer_len = self.buffer.len();
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let max_copy = min(u32::MAX as usize, buffer_len);
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let plaintext = self.buffer.copy_to_bytes(max_copy);
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@ -124,38 +118,42 @@ impl<T: 'static + AsyncWrite + Unpin + Send + Sync> AsyncWrite for EncryptedWrit
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let cipher = self.cipher.take().unwrap();
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self.fut_write = Some(Box::pin(write_bytes(plaintext, writer, cipher)))
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} else {
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return Poll::Ready(Ok(written_length));
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}
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}
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if self.fut_write.is_some() {
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match self.fut_write.as_mut().unwrap().as_mut().poll(cx) {
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Poll::Ready((result, writer, cipher)) => {
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self.inner = Some(writer);
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self.cipher = Some(cipher);
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self.fut_write = None;
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Poll::Ready(result.map(|_| buf.len()))
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}
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Poll::Pending => Poll::Pending,
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match self.fut_write.as_mut().unwrap().as_mut().poll(cx) {
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Poll::Ready((result, writer, cipher)) => {
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self.inner = Some(writer);
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self.cipher = Some(cipher);
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self.fut_write = None;
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Poll::Ready(result.map(|_| written_length))
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}
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} else {
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Poll::Ready(Ok(buf.len()))
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Poll::Pending => Poll::Pending,
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}
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}
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fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Error>> {
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let buffer_len = self.buffer.len();
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if !self.buffer.is_empty() && self.fut_flush.is_none() {
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if self.fut_flush.is_none() {
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let max_copy = min(u32::MAX as usize, buffer_len);
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let plaintext = self.buffer.copy_to_bytes(max_copy);
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let writer = self.inner.take().unwrap();
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let cipher = self.cipher.take().unwrap();
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self.fut_flush = Some(Box::pin(async move {
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let (result, mut writer, cipher) = write_bytes(plaintext, writer, cipher).await;
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if result.is_err() {
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return (result, writer, cipher);
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}
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let (mut writer, cipher) = if plaintext.len() > 0 {
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let (result, writer, cipher) = write_bytes(plaintext, writer, cipher).await;
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if result.is_err() {
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return (result, writer, cipher);
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}
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(writer, cipher)
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} else {
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(writer, cipher)
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};
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if let Err(e) = writer.flush().await {
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(Err(e), writer, cipher)
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} else {
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@ -200,11 +198,13 @@ impl<T: 'static + AsyncWrite + Unpin + Send + Sync> AsyncWrite for EncryptedWrit
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}
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}
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#[tracing::instrument(level = "trace", skip_all)]
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async fn write_bytes<T: AsyncWrite + Unpin>(
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bytes: Bytes,
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mut writer: T,
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cipher: CipherBox,
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) -> (io::Result<()>, T, CipherBox) {
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tracing::trace!("plaintext size: {}", bytes.len());
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let encrypted_bytes = match cipher.encrypt(bytes) {
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Ok(b) => b,
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Err(e) => {
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@ -212,9 +212,29 @@ async fn write_bytes<T: AsyncWrite + Unpin>(
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}
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};
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let package_bytes = EncryptedPackage::new(encrypted_bytes).into_bytes();
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tracing::trace!("encrypted size: {}", package_bytes.len());
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if let Err(e) = writer.write_all(&package_bytes[..]).await {
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return (Err(e), writer, cipher);
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}
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tracing::trace!("everything sent");
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(Ok(()), writer, cipher)
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}
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#[tracing::instrument(level = "trace", skip_all)]
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async fn read_bytes<T: AsyncRead + Unpin>(
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mut reader: T,
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cipher: CipherBox,
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) -> (io::Result<Bytes>, T, CipherBox) {
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let package = match EncryptedPackage::from_async_read(&mut reader).await {
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Ok(p) => p,
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Err(e) => {
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return (Err(e), reader, cipher);
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}
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};
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tracing::trace!("received {} bytes", package.bytes.len());
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match cipher.decrypt(package.into_inner()) {
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Ok(bytes) => (Ok(bytes), reader, cipher),
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Err(e) => (Err(e), reader, cipher),
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}
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}
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