private void wrap(ChannelHandlerContext ctx, boolean inUnwrap) throws SSLException {
ByteBuf out = null;
ChannelPromise promise = null;
ByteBufAllocator alloc = ctx.alloc();
try {
for (; ; ) {
Object msg = pendingUnencryptedWrites.current();
if (msg == null) {
break;
}
ByteBuf buf = (ByteBuf) msg;
if (out == null) {
out = allocateOutNetBuf(ctx, buf.readableBytes());
}
SSLEngineResult result = wrap(alloc, engine, buf, out);
if (!buf.isReadable()) {
promise = pendingUnencryptedWrites.remove();
} else {
promise = null;
}
if (result.getStatus() == Status.CLOSED) {
// SSLEngine has been closed already.
// Any further write attempts should be denied.
pendingUnencryptedWrites.removeAndFailAll(SSLENGINE_CLOSED);
return;
} else {
switch (result.getHandshakeStatus()) {
case NEED_TASK:
runDelegatedTasks();
break;
case FINISHED:
setHandshakeSuccess();
// deliberate fall-through
case NOT_HANDSHAKING:
setHandshakeSuccessIfStillHandshaking();
// deliberate fall-through
case NEED_WRAP:
finishWrap(ctx, out, promise, inUnwrap);
promise = null;
out = null;
break;
case NEED_UNWRAP:
return;
default:
throw new IllegalStateException(
"Unknown handshake status: " + result.getHandshakeStatus());
}
}
}
} catch (SSLException e) {
setHandshakeFailure(ctx, e);
throw e;
} finally {
finishWrap(ctx, out, promise, inUnwrap);
}
}
@Override
public void handlerRemoved0(ChannelHandlerContext ctx) throws Exception {
if (!pendingUnencryptedWrites.isEmpty()) {
// Check if queue is not empty first because create a new ChannelException is expensive
pendingUnencryptedWrites.removeAndFailAll(
new ChannelException("Pending write on removal of SslHandler"));
}
}
/** Notify all the handshake futures about the failure during the handshake. */
private void setHandshakeFailure(ChannelHandlerContext ctx, Throwable cause) {
// Release all resources such as internal buffers that SSLEngine
// is managing.
engine.closeOutbound();
try {
engine.closeInbound();
} catch (SSLException e) {
// only log in debug mode as it most likely harmless and latest chrome still trigger
// this all the time.
//
// See https://github.com/netty/netty/issues/1340
String msg = e.getMessage();
if (msg == null || !msg.contains("possible truncation attack")) {
logger.debug("{} SSLEngine.closeInbound() raised an exception.", ctx.channel(), e);
}
}
notifyHandshakeFailure(cause);
pendingUnencryptedWrites.removeAndFailAll(cause);
}