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Fixs two issues in `TLSWrap`, one of them is reported in nodejs#30896. 1. `TLSWrap` has exactly one `StreamListener`, however, that `StreamListener` can be replaced. We have not been rigorous enough here: if an active write has not been finished before the transition, the finish callback of it will be wrongly fired the successor `StreamListener`. 2. A `TLSWrap` does not allow more than one active write, as checked in the assertion about current_write in `TLSWrap::DoWrite()`. However, when users make use of an existing `tls.TLSSocket` to establish double TLS, by either tls.connect({socket: tlssock}) or tlsServer.emit('connection', tlssock) we have both of the user provided `tls.TLSSocket`, tlssock and a brand new created `TLSWrap` writing to the `TLSWrap` bound to tlssock, which easily violates the constranint because two writers have no idea of each other. The design of the fix is: when a `TLSWrap` is created on top of a user provided socket, do not send any data to the socket until all existing writes of the socket are done and ensure registered callbacks of those writes can be fired.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| 'use strict'; | ||
| const common = require('../common'); | ||
| const assert = require('assert'); | ||
| if (!common.hasCrypto) common.skip('missing crypto'); | ||
| const fixtures = require('../common/fixtures'); | ||
| const tls = require('tls'); | ||
|
|
||
| // In reality, this can be a HTTP CONNECT message, signaling the incoming | ||
| // data is TLS encrypted | ||
| const HEAD = 'XXXX'; | ||
|
|
||
| const subserver = tls.createServer({ | ||
| key: fixtures.readKey('agent1-key.pem'), | ||
| cert: fixtures.readKey('agent1-cert.pem'), | ||
| }) | ||
| .on('secureConnection', common.mustCall(() => { | ||
| process.exit(0); | ||
| })); | ||
|
|
||
| const server = tls.createServer({ | ||
| key: fixtures.readKey('agent1-key.pem'), | ||
| cert: fixtures.readKey('agent1-cert.pem'), | ||
| }) | ||
| .listen(client) | ||
| .on('secureConnection', (serverTlsSock) => { | ||
| serverTlsSock.on('data', (chunk) => { | ||
| assert.strictEqual(chunk.toString(), HEAD); | ||
| subserver.emit('connection', serverTlsSock); | ||
| }); | ||
| }); | ||
|
|
||
| function client() { | ||
| const down = tls.connect({ | ||
| host: '127.0.0.1', | ||
| port: server.address().port, | ||
| rejectUnauthorized: false | ||
| }).on('secureConnect', () => { | ||
| down.write(HEAD, common.mustSucceed()); | ||
|
|
||
| // Sending tls data on a client TLSSocket with an active write led to a crash: | ||
| // | ||
| // node[16862]: ../src/crypto/crypto_tls.cc:963:virtual int node::crypto::TLSWrap::DoWrite(node::WriteWrap*, | ||
| // uv_buf_t*, size_t, uv_stream_t*): Assertion `!current_write_' failed. | ||
| // 1: 0xb090e0 node::Abort() [node] | ||
| // 2: 0xb0915e [node] | ||
| // 3: 0xca8413 node::crypto::TLSWrap::DoWrite(node::WriteWrap*, uv_buf_t*, unsigned long, uv_stream_s*) [node] | ||
| // 4: 0xcaa549 node::StreamBase::Write(uv_buf_t*, unsigned long, uv_stream_s*, v8::Local<v8::Object>) [node] | ||
| // 5: 0xca88d7 node::crypto::TLSWrap::EncOut() [node] | ||
| // 6: 0xd3df3e [node] | ||
| // 7: 0xd3f35f v8::internal::Builtin_HandleApiCall(int, unsigned long*, v8::internal::Isolate*) [node] | ||
| // 8: 0x15d9ef9 [node] | ||
| // Aborted | ||
| tls.connect({ | ||
| socket: down, | ||
| rejectUnauthorized: false | ||
| }); | ||
| }); | ||
| } |
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