2 * Copyright 2015 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <folly/io/async/AsyncSSLSocket.h>
19 #include <folly/io/async/EventBase.h>
21 #include <boost/noncopyable.hpp>
24 #include <netinet/in.h>
25 #include <netinet/tcp.h>
26 #include <openssl/err.h>
27 #include <openssl/asn1.h>
28 #include <openssl/ssl.h>
29 #include <sys/types.h>
30 #include <sys/socket.h>
34 #include <folly/Bits.h>
35 #include <folly/SocketAddress.h>
36 #include <folly/SpinLock.h>
37 #include <folly/io/IOBuf.h>
38 #include <folly/io/Cursor.h>
40 using folly::SocketAddress;
41 using folly::SSLContext;
43 using std::shared_ptr;
47 using folly::SpinLock;
48 using folly::SpinLockGuard;
49 using folly::io::Cursor;
50 using std::unique_ptr;
54 using folly::AsyncSocket;
55 using folly::AsyncSocketException;
56 using folly::AsyncSSLSocket;
57 using folly::Optional;
59 // We have one single dummy SSL context so that we can implement attach
60 // and detach methods in a thread safe fashion without modifying opnessl.
61 static SSLContext *dummyCtx = nullptr;
62 static SpinLock dummyCtxLock;
64 // Numbers chosen as to not collide with functions in ssl.h
65 const uint8_t TASYNCSSLSOCKET_F_PERFORM_READ = 90;
66 const uint8_t TASYNCSSLSOCKET_F_PERFORM_WRITE = 91;
68 // If given min write size is less than this, buffer will be allocated on
69 // stack, otherwise it is allocated on heap
70 const size_t MAX_STACK_BUF_SIZE = 2048;
72 // This converts "illegal" shutdowns into ZERO_RETURN
73 inline bool zero_return(int error, int rc) {
74 return (error == SSL_ERROR_ZERO_RETURN || (rc == 0 && errno == 0));
77 class AsyncSSLSocketConnector: public AsyncSocket::ConnectCallback,
78 public AsyncSSLSocket::HandshakeCB {
81 AsyncSSLSocket *sslSocket_;
82 AsyncSSLSocket::ConnectCallback *callback_;
87 ~AsyncSSLSocketConnector() override {}
90 AsyncSSLSocketConnector(AsyncSSLSocket *sslSocket,
91 AsyncSocket::ConnectCallback *callback,
93 sslSocket_(sslSocket),
96 startTime_(std::chrono::duration_cast<std::chrono::milliseconds>(
97 std::chrono::steady_clock::now().time_since_epoch()).count()) {
100 void connectSuccess() noexcept override {
101 VLOG(7) << "client socket connected";
103 int64_t timeoutLeft = 0;
105 auto curTime = std::chrono::duration_cast<std::chrono::milliseconds>(
106 std::chrono::steady_clock::now().time_since_epoch()).count();
108 timeoutLeft = timeout_ - (curTime - startTime_);
109 if (timeoutLeft <= 0) {
110 AsyncSocketException ex(AsyncSocketException::TIMED_OUT,
111 "SSL connect timed out");
117 sslSocket_->sslConn(this, timeoutLeft);
120 void connectErr(const AsyncSocketException& ex) noexcept override {
121 LOG(ERROR) << "TCP connect failed: " << ex.what();
126 void handshakeSuc(AsyncSSLSocket* sock) noexcept override {
127 VLOG(7) << "client handshake success";
129 callback_->connectSuccess();
134 void handshakeErr(AsyncSSLSocket* socket,
135 const AsyncSocketException& ex) noexcept override {
136 LOG(ERROR) << "client handshakeErr: " << ex.what();
141 void fail(const AsyncSocketException &ex) {
142 // fail is a noop if called twice
144 AsyncSSLSocket::ConnectCallback *cb = callback_;
148 sslSocket_->closeNow();
149 // closeNow can call handshakeErr if it hasn't been called already.
150 // So this may have been deleted, no member variable access beyond this
152 // Note that closeNow may invoke writeError callbacks if the socket had
153 // write data pending connection completion.
158 // XXX: implement an equivalent to corking for platforms with TCP_NOPUSH?
159 #ifdef TCP_CORK // Linux-only
161 * Utility class that corks a TCP socket upon construction or uncorks
162 * the socket upon destruction
164 class CorkGuard : private boost::noncopyable {
166 CorkGuard(int fd, bool multipleWrites, bool haveMore, bool* corked):
167 fd_(fd), haveMore_(haveMore), corked_(corked) {
169 // socket is already corked; nothing to do
172 if (multipleWrites || haveMore) {
173 // We are performing multiple writes in this performWrite() call,
174 // and/or there are more calls to performWrite() that will be invoked
175 // later, so enable corking
177 setsockopt(fd_, IPPROTO_TCP, TCP_CORK, &flag, sizeof(flag));
184 // more data to come; don't uncork yet
188 // socket isn't corked; nothing to do
193 setsockopt(fd_, IPPROTO_TCP, TCP_CORK, &flag, sizeof(flag));
203 class CorkGuard : private boost::noncopyable {
205 CorkGuard(int, bool, bool, bool*) {}
209 void setup_SSL_CTX(SSL_CTX *ctx) {
210 #ifdef SSL_MODE_RELEASE_BUFFERS
211 SSL_CTX_set_mode(ctx,
212 SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER |
213 SSL_MODE_ENABLE_PARTIAL_WRITE
214 | SSL_MODE_RELEASE_BUFFERS
217 SSL_CTX_set_mode(ctx,
218 SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER |
219 SSL_MODE_ENABLE_PARTIAL_WRITE
222 // SSL_CTX_set_mode is a Macro
223 #ifdef SSL_MODE_WRITE_IOVEC
224 SSL_CTX_set_mode(ctx,
225 SSL_CTX_get_mode(ctx)
226 | SSL_MODE_WRITE_IOVEC);
231 BIO_METHOD eorAwareBioMethod;
233 void* initEorBioMethod(void) {
234 memcpy(&eorAwareBioMethod, BIO_s_socket(), sizeof(eorAwareBioMethod));
235 // override the bwrite method for MSG_EOR support
236 eorAwareBioMethod.bwrite = AsyncSSLSocket::eorAwareBioWrite;
238 // Note that the eorAwareBioMethod.type and eorAwareBioMethod.name are not
239 // set here. openssl code seems to be checking ".type == BIO_TYPE_SOCKET" and
240 // then have specific handlings. The eorAwareBioWrite should be compatible
241 // with the one in openssl.
243 // Return something here to enable AsyncSSLSocket to call this method using
244 // a function-scoped static.
248 } // anonymous namespace
252 SSLException::SSLException(int sslError, int errno_copy):
253 AsyncSocketException(
254 AsyncSocketException::SSL_ERROR,
255 ERR_error_string(sslError, msg_),
256 sslError == SSL_ERROR_SYSCALL ? errno_copy : 0), error_(sslError) {}
259 * Create a client AsyncSSLSocket
261 AsyncSSLSocket::AsyncSSLSocket(const shared_ptr<SSLContext> &ctx,
262 EventBase* evb, bool deferSecurityNegotiation) :
265 handshakeTimeout_(this, evb) {
267 if (deferSecurityNegotiation) {
268 sslState_ = STATE_UNENCRYPTED;
273 * Create a server/client AsyncSSLSocket
275 AsyncSSLSocket::AsyncSSLSocket(const shared_ptr<SSLContext>& ctx,
276 EventBase* evb, int fd, bool server,
277 bool deferSecurityNegotiation) :
278 AsyncSocket(evb, fd),
281 handshakeTimeout_(this, evb) {
284 SSL_CTX_set_info_callback(ctx_->getSSLCtx(),
285 AsyncSSLSocket::sslInfoCallback);
287 if (deferSecurityNegotiation) {
288 sslState_ = STATE_UNENCRYPTED;
292 #if OPENSSL_VERSION_NUMBER >= 0x1000105fL && !defined(OPENSSL_NO_TLSEXT)
294 * Create a client AsyncSSLSocket and allow tlsext_hostname
295 * to be sent in Client Hello.
297 AsyncSSLSocket::AsyncSSLSocket(const shared_ptr<SSLContext> &ctx,
299 const std::string& serverName,
300 bool deferSecurityNegotiation) :
301 AsyncSSLSocket(ctx, evb, deferSecurityNegotiation) {
302 tlsextHostname_ = serverName;
306 * Create a client AsyncSSLSocket from an already connected fd
307 * and allow tlsext_hostname to be sent in Client Hello.
309 AsyncSSLSocket::AsyncSSLSocket(const shared_ptr<SSLContext>& ctx,
310 EventBase* evb, int fd,
311 const std::string& serverName,
312 bool deferSecurityNegotiation) :
313 AsyncSSLSocket(ctx, evb, fd, false, deferSecurityNegotiation) {
314 tlsextHostname_ = serverName;
318 AsyncSSLSocket::~AsyncSSLSocket() {
319 VLOG(3) << "actual destruction of AsyncSSLSocket(this=" << this
320 << ", evb=" << eventBase_ << ", fd=" << fd_
321 << ", state=" << int(state_) << ", sslState="
322 << sslState_ << ", events=" << eventFlags_ << ")";
325 void AsyncSSLSocket::init() {
326 // Do this here to ensure we initialize this once before any use of
327 // AsyncSSLSocket instances and not as part of library load.
328 static const auto eorAwareBioMethodInitializer = initEorBioMethod();
329 (void)eorAwareBioMethodInitializer;
331 setup_SSL_CTX(ctx_->getSSLCtx());
334 void AsyncSSLSocket::closeNow() {
335 // Close the SSL connection.
336 if (ssl_ != nullptr && fd_ != -1) {
337 int rc = SSL_shutdown(ssl_);
339 rc = SSL_shutdown(ssl_);
346 if (sslSession_ != nullptr) {
347 SSL_SESSION_free(sslSession_);
348 sslSession_ = nullptr;
351 sslState_ = STATE_CLOSED;
353 if (handshakeTimeout_.isScheduled()) {
354 handshakeTimeout_.cancelTimeout();
357 DestructorGuard dg(this);
360 AsyncSocketException(
361 AsyncSocketException::END_OF_FILE,
362 "SSL connection closed locally"));
364 if (ssl_ != nullptr) {
370 AsyncSocket::closeNow();
373 void AsyncSSLSocket::shutdownWrite() {
374 // SSL sockets do not support half-shutdown, so just perform a full shutdown.
376 // (Performing a full shutdown here is more desirable than doing nothing at
377 // all. The purpose of shutdownWrite() is normally to notify the other end
378 // of the connection that no more data will be sent. If we do nothing, the
379 // other end will never know that no more data is coming, and this may result
380 // in protocol deadlock.)
384 void AsyncSSLSocket::shutdownWriteNow() {
388 bool AsyncSSLSocket::good() const {
389 return (AsyncSocket::good() &&
390 (sslState_ == STATE_ACCEPTING || sslState_ == STATE_CONNECTING ||
391 sslState_ == STATE_ESTABLISHED || sslState_ == STATE_UNENCRYPTED));
394 // The TAsyncTransport definition of 'good' states that the transport is
395 // ready to perform reads and writes, so sslState_ == UNINIT must report !good.
396 // connecting can be true when the sslState_ == UNINIT because the AsyncSocket
397 // is connected but we haven't initiated the call to SSL_connect.
398 bool AsyncSSLSocket::connecting() const {
400 (AsyncSocket::connecting() ||
401 (AsyncSocket::good() && (sslState_ == STATE_UNINIT ||
402 sslState_ == STATE_CONNECTING))));
405 bool AsyncSSLSocket::isEorTrackingEnabled() const {
406 const BIO *wb = SSL_get_wbio(ssl_);
407 return wb && wb->method == &eorAwareBioMethod;
410 void AsyncSSLSocket::setEorTracking(bool track) {
411 BIO *wb = SSL_get_wbio(ssl_);
413 throw AsyncSocketException(AsyncSocketException::INVALID_STATE,
414 "setting EOR tracking without an initialized "
419 if (wb->method != &eorAwareBioMethod) {
420 // only do this if we didn't
421 wb->method = &eorAwareBioMethod;
422 BIO_set_app_data(wb, this);
424 minEorRawByteNo_ = 0;
426 } else if (wb->method == &eorAwareBioMethod) {
427 wb->method = BIO_s_socket();
428 BIO_set_app_data(wb, nullptr);
430 minEorRawByteNo_ = 0;
432 CHECK(wb->method == BIO_s_socket());
436 size_t AsyncSSLSocket::getRawBytesWritten() const {
438 if (!ssl_ || !(b = SSL_get_wbio(ssl_))) {
442 return BIO_number_written(b);
445 size_t AsyncSSLSocket::getRawBytesReceived() const {
447 if (!ssl_ || !(b = SSL_get_rbio(ssl_))) {
451 return BIO_number_read(b);
455 void AsyncSSLSocket::invalidState(HandshakeCB* callback) {
456 LOG(ERROR) << "AsyncSSLSocket(this=" << this << ", fd=" << fd_
457 << ", state=" << int(state_) << ", sslState=" << sslState_ << ", "
458 << "events=" << eventFlags_ << ", server=" << short(server_) << "): "
459 << "sslAccept/Connect() called in invalid "
460 << "state, handshake callback " << handshakeCallback_ << ", new callback "
462 assert(!handshakeTimeout_.isScheduled());
463 sslState_ = STATE_ERROR;
465 AsyncSocketException ex(AsyncSocketException::INVALID_STATE,
466 "sslAccept() called with socket in invalid state");
468 handshakeEndTime_ = std::chrono::steady_clock::now();
470 callback->handshakeErr(this, ex);
473 // Check the socket state not the ssl state here.
474 if (state_ != StateEnum::CLOSED || state_ != StateEnum::ERROR) {
475 failHandshake(__func__, ex);
479 void AsyncSSLSocket::sslAccept(HandshakeCB* callback, uint32_t timeout,
480 const SSLContext::SSLVerifyPeerEnum& verifyPeer) {
481 DestructorGuard dg(this);
482 assert(eventBase_->isInEventBaseThread());
483 verifyPeer_ = verifyPeer;
485 // Make sure we're in the uninitialized state
486 if (!server_ || (sslState_ != STATE_UNINIT &&
487 sslState_ != STATE_UNENCRYPTED) ||
488 handshakeCallback_ != nullptr) {
489 return invalidState(callback);
491 handshakeStartTime_ = std::chrono::steady_clock::now();
492 // Make end time at least >= start time.
493 handshakeEndTime_ = handshakeStartTime_;
495 sslState_ = STATE_ACCEPTING;
496 handshakeCallback_ = callback;
499 handshakeTimeout_.scheduleTimeout(timeout);
502 /* register for a read operation (waiting for CLIENT HELLO) */
503 updateEventRegistration(EventHandler::READ, EventHandler::WRITE);
506 #if OPENSSL_VERSION_NUMBER >= 0x009080bfL
507 void AsyncSSLSocket::attachSSLContext(
508 const std::shared_ptr<SSLContext>& ctx) {
510 // Check to ensure we are in client mode. Changing a server's ssl
511 // context doesn't make sense since clients of that server would likely
512 // become confused when the server's context changes.
516 DCHECK(ctx->getSSLCtx());
519 // In order to call attachSSLContext, detachSSLContext must have been
520 // previously called which sets the socket's context to the dummy
521 // context. Thus we must acquire this lock.
522 SpinLockGuard guard(dummyCtxLock);
523 SSL_set_SSL_CTX(ssl_, ctx->getSSLCtx());
526 void AsyncSSLSocket::detachSSLContext() {
529 // We aren't using the initial_ctx for now, and it can introduce race
530 // conditions in the destructor of the SSL object.
531 #ifndef OPENSSL_NO_TLSEXT
532 if (ssl_->initial_ctx) {
533 SSL_CTX_free(ssl_->initial_ctx);
534 ssl_->initial_ctx = nullptr;
537 SpinLockGuard guard(dummyCtxLock);
538 if (nullptr == dummyCtx) {
539 // We need to lazily initialize the dummy context so we don't
540 // accidentally override any programmatic settings to openssl
541 dummyCtx = new SSLContext;
543 // We must remove this socket's references to its context right now
544 // since this socket could get passed to any thread. If the context has
545 // had its locking disabled, just doing a set in attachSSLContext()
546 // would not be thread safe.
547 SSL_set_SSL_CTX(ssl_, dummyCtx->getSSLCtx());
551 #if OPENSSL_VERSION_NUMBER >= 0x1000105fL && !defined(OPENSSL_NO_TLSEXT)
552 void AsyncSSLSocket::switchServerSSLContext(
553 const std::shared_ptr<SSLContext>& handshakeCtx) {
555 if (sslState_ != STATE_ACCEPTING) {
556 // We log it here and allow the switch.
557 // It should not affect our re-negotiation support (which
558 // is not supported now).
559 VLOG(6) << "fd=" << getFd()
560 << " renegotation detected when switching SSL_CTX";
563 setup_SSL_CTX(handshakeCtx->getSSLCtx());
564 SSL_CTX_set_info_callback(handshakeCtx->getSSLCtx(),
565 AsyncSSLSocket::sslInfoCallback);
566 handshakeCtx_ = handshakeCtx;
567 SSL_set_SSL_CTX(ssl_, handshakeCtx->getSSLCtx());
570 bool AsyncSSLSocket::isServerNameMatch() const {
577 SSL_SESSION *ss = SSL_get_session(ssl_);
582 if(!ss->tlsext_hostname) {
585 return (tlsextHostname_.compare(ss->tlsext_hostname) ? false : true);
588 void AsyncSSLSocket::setServerName(std::string serverName) noexcept {
589 tlsextHostname_ = std::move(serverName);
594 void AsyncSSLSocket::timeoutExpired() noexcept {
595 if (state_ == StateEnum::ESTABLISHED &&
596 (sslState_ == STATE_CACHE_LOOKUP ||
597 sslState_ == STATE_RSA_ASYNC_PENDING)) {
598 sslState_ = STATE_ERROR;
599 // We are expecting a callback in restartSSLAccept. The cache lookup
600 // and rsa-call necessarily have pointers to this ssl socket, so delay
601 // the cleanup until he calls us back.
603 assert(state_ == StateEnum::ESTABLISHED &&
604 (sslState_ == STATE_CONNECTING || sslState_ == STATE_ACCEPTING));
605 DestructorGuard dg(this);
606 AsyncSocketException ex(AsyncSocketException::TIMED_OUT,
607 (sslState_ == STATE_CONNECTING) ?
608 "SSL connect timed out" : "SSL accept timed out");
609 failHandshake(__func__, ex);
613 int AsyncSSLSocket::getSSLExDataIndex() {
614 static auto index = SSL_get_ex_new_index(
615 0, (void*)"AsyncSSLSocket data index", nullptr, nullptr, nullptr);
619 AsyncSSLSocket* AsyncSSLSocket::getFromSSL(const SSL *ssl) {
620 return static_cast<AsyncSSLSocket *>(SSL_get_ex_data(ssl,
621 getSSLExDataIndex()));
624 void AsyncSSLSocket::failHandshake(const char* fn,
625 const AsyncSocketException& ex) {
627 if (handshakeTimeout_.isScheduled()) {
628 handshakeTimeout_.cancelTimeout();
630 invokeHandshakeErr(ex);
634 void AsyncSSLSocket::invokeHandshakeErr(const AsyncSocketException& ex) {
635 handshakeEndTime_ = std::chrono::steady_clock::now();
636 if (handshakeCallback_ != nullptr) {
637 HandshakeCB* callback = handshakeCallback_;
638 handshakeCallback_ = nullptr;
639 callback->handshakeErr(this, ex);
643 void AsyncSSLSocket::invokeHandshakeCB() {
644 handshakeEndTime_ = std::chrono::steady_clock::now();
645 if (handshakeTimeout_.isScheduled()) {
646 handshakeTimeout_.cancelTimeout();
648 if (handshakeCallback_) {
649 HandshakeCB* callback = handshakeCallback_;
650 handshakeCallback_ = nullptr;
651 callback->handshakeSuc(this);
655 void AsyncSSLSocket::connect(ConnectCallback* callback,
656 const folly::SocketAddress& address,
658 const OptionMap &options,
659 const folly::SocketAddress& bindAddr)
662 assert(state_ == StateEnum::UNINIT);
663 assert(sslState_ == STATE_UNINIT);
664 AsyncSSLSocketConnector *connector =
665 new AsyncSSLSocketConnector(this, callback, timeout);
666 AsyncSocket::connect(connector, address, timeout, options, bindAddr);
669 void AsyncSSLSocket::applyVerificationOptions(SSL * ssl) {
670 // apply the settings specified in verifyPeer_
671 if (verifyPeer_ == SSLContext::SSLVerifyPeerEnum::USE_CTX) {
672 if(ctx_->needsPeerVerification()) {
673 SSL_set_verify(ssl, ctx_->getVerificationMode(),
674 AsyncSSLSocket::sslVerifyCallback);
677 if (verifyPeer_ == SSLContext::SSLVerifyPeerEnum::VERIFY ||
678 verifyPeer_ == SSLContext::SSLVerifyPeerEnum::VERIFY_REQ_CLIENT_CERT) {
679 SSL_set_verify(ssl, SSLContext::getVerificationMode(verifyPeer_),
680 AsyncSSLSocket::sslVerifyCallback);
685 void AsyncSSLSocket::sslConn(HandshakeCB* callback, uint64_t timeout,
686 const SSLContext::SSLVerifyPeerEnum& verifyPeer) {
687 DestructorGuard dg(this);
688 assert(eventBase_->isInEventBaseThread());
690 verifyPeer_ = verifyPeer;
692 // Make sure we're in the uninitialized state
693 if (server_ || (sslState_ != STATE_UNINIT && sslState_ !=
694 STATE_UNENCRYPTED) ||
695 handshakeCallback_ != nullptr) {
696 return invalidState(callback);
699 handshakeStartTime_ = std::chrono::steady_clock::now();
700 // Make end time at least >= start time.
701 handshakeEndTime_ = handshakeStartTime_;
703 sslState_ = STATE_CONNECTING;
704 handshakeCallback_ = callback;
707 ssl_ = ctx_->createSSL();
708 } catch (std::exception &e) {
709 sslState_ = STATE_ERROR;
710 AsyncSocketException ex(AsyncSocketException::INTERNAL_ERROR,
711 "error calling SSLContext::createSSL()");
712 LOG(ERROR) << "AsyncSSLSocket::sslConn(this=" << this << ", fd="
713 << fd_ << "): " << e.what();
714 return failHandshake(__func__, ex);
717 applyVerificationOptions(ssl_);
719 SSL_set_fd(ssl_, fd_);
720 if (sslSession_ != nullptr) {
721 SSL_set_session(ssl_, sslSession_);
722 SSL_SESSION_free(sslSession_);
723 sslSession_ = nullptr;
725 #if OPENSSL_VERSION_NUMBER >= 0x1000105fL && !defined(OPENSSL_NO_TLSEXT)
726 if (tlsextHostname_.size()) {
727 SSL_set_tlsext_host_name(ssl_, tlsextHostname_.c_str());
731 SSL_set_ex_data(ssl_, getSSLExDataIndex(), this);
734 handshakeTimeout_.scheduleTimeout(timeout);
740 SSL_SESSION *AsyncSSLSocket::getSSLSession() {
741 if (ssl_ != nullptr && sslState_ == STATE_ESTABLISHED) {
742 return SSL_get1_session(ssl_);
748 void AsyncSSLSocket::setSSLSession(SSL_SESSION *session, bool takeOwnership) {
749 sslSession_ = session;
750 if (!takeOwnership && session != nullptr) {
751 // Increment the reference count
752 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION);
756 void AsyncSSLSocket::getSelectedNextProtocol(const unsigned char** protoName,
757 unsigned* protoLen) const {
758 if (!getSelectedNextProtocolNoThrow(protoName, protoLen)) {
759 throw AsyncSocketException(AsyncSocketException::NOT_SUPPORTED,
760 "NPN not supported");
764 bool AsyncSSLSocket::getSelectedNextProtocolNoThrow(
765 const unsigned char** protoName,
766 unsigned* protoLen) const {
767 *protoName = nullptr;
769 #ifdef OPENSSL_NPN_NEGOTIATED
770 SSL_get0_next_proto_negotiated(ssl_, protoName, protoLen);
777 bool AsyncSSLSocket::getSSLSessionReused() const {
778 if (ssl_ != nullptr && sslState_ == STATE_ESTABLISHED) {
779 return SSL_session_reused(ssl_);
784 const char *AsyncSSLSocket::getNegotiatedCipherName() const {
785 return (ssl_ != nullptr) ? SSL_get_cipher_name(ssl_) : nullptr;
788 const char *AsyncSSLSocket::getSSLServerName() const {
789 #ifdef SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
790 return (ssl_ != nullptr) ? SSL_get_servername(ssl_, TLSEXT_NAMETYPE_host_name)
793 throw AsyncSocketException(AsyncSocketException::NOT_SUPPORTED,
794 "SNI not supported");
798 const char *AsyncSSLSocket::getSSLServerNameNoThrow() const {
800 return getSSLServerName();
801 } catch (AsyncSocketException& ex) {
806 int AsyncSSLSocket::getSSLVersion() const {
807 return (ssl_ != nullptr) ? SSL_version(ssl_) : 0;
810 const char *AsyncSSLSocket::getSSLCertSigAlgName() const {
811 X509 *cert = (ssl_ != nullptr) ? SSL_get_certificate(ssl_) : nullptr;
813 int nid = OBJ_obj2nid(cert->sig_alg->algorithm);
814 return OBJ_nid2ln(nid);
819 int AsyncSSLSocket::getSSLCertSize() const {
821 X509 *cert = (ssl_ != nullptr) ? SSL_get_certificate(ssl_) : nullptr;
823 EVP_PKEY *key = X509_get_pubkey(cert);
824 certSize = EVP_PKEY_bits(key);
830 bool AsyncSSLSocket::willBlock(int ret, int *errorOut) noexcept {
831 int error = *errorOut = SSL_get_error(ssl_, ret);
832 if (error == SSL_ERROR_WANT_READ) {
833 // Register for read event if not already.
834 updateEventRegistration(EventHandler::READ, EventHandler::WRITE);
836 } else if (error == SSL_ERROR_WANT_WRITE) {
837 VLOG(3) << "AsyncSSLSocket(fd=" << fd_
838 << ", state=" << int(state_) << ", sslState="
839 << sslState_ << ", events=" << eventFlags_ << "): "
840 << "SSL_ERROR_WANT_WRITE";
841 // Register for write event if not already.
842 updateEventRegistration(EventHandler::WRITE, EventHandler::READ);
844 #ifdef SSL_ERROR_WANT_SESS_CACHE_LOOKUP
845 } else if (error == SSL_ERROR_WANT_SESS_CACHE_LOOKUP) {
846 // We will block but we can't register our own socket. The callback that
847 // triggered this code will re-call handleAccept at the appropriate time.
849 // We can only get here if the linked libssl.so has support for this feature
850 // as well, otherwise SSL_get_error cannot return our error code.
851 sslState_ = STATE_CACHE_LOOKUP;
853 // Unregister for all events while blocked here
854 updateEventRegistration(EventHandler::NONE,
855 EventHandler::READ | EventHandler::WRITE);
857 // The timeout (if set) keeps running here
860 #ifdef SSL_ERROR_WANT_RSA_ASYNC_PENDING
861 } else if (error == SSL_ERROR_WANT_RSA_ASYNC_PENDING) {
862 // Our custom openssl function has kicked off an async request to do
863 // modular exponentiation. When that call returns, a callback will
864 // be invoked that will re-call handleAccept.
865 sslState_ = STATE_RSA_ASYNC_PENDING;
867 // Unregister for all events while blocked here
868 updateEventRegistration(
870 EventHandler::READ | EventHandler::WRITE
873 // The timeout (if set) keeps running here
877 // SSL_ERROR_ZERO_RETURN is processed here so we can get some detail
879 long lastError = ERR_get_error();
880 VLOG(6) << "AsyncSSLSocket(fd=" << fd_ << ", "
881 << "state=" << state_ << ", "
882 << "sslState=" << sslState_ << ", "
883 << "events=" << std::hex << eventFlags_ << "): "
884 << "SSL error: " << error << ", "
885 << "errno: " << errno << ", "
886 << "ret: " << ret << ", "
887 << "read: " << BIO_number_read(SSL_get_rbio(ssl_)) << ", "
888 << "written: " << BIO_number_written(SSL_get_wbio(ssl_)) << ", "
889 << "func: " << ERR_func_error_string(lastError) << ", "
890 << "reason: " << ERR_reason_error_string(lastError);
891 if (error != SSL_ERROR_SYSCALL) {
892 if (error == SSL_ERROR_SSL) {
893 *errorOut = lastError;
895 if ((unsigned long)lastError < 0x8000) {
906 void AsyncSSLSocket::checkForImmediateRead() noexcept {
907 // openssl may have buffered data that it read from the socket already.
908 // In this case we have to process it immediately, rather than waiting for
909 // the socket to become readable again.
910 if (ssl_ != nullptr && SSL_pending(ssl_) > 0) {
911 AsyncSocket::handleRead();
916 AsyncSSLSocket::restartSSLAccept()
918 VLOG(3) << "AsyncSSLSocket::restartSSLAccept() this=" << this << ", fd=" << fd_
919 << ", state=" << int(state_) << ", "
920 << "sslState=" << sslState_ << ", events=" << eventFlags_;
921 DestructorGuard dg(this);
923 sslState_ == STATE_CACHE_LOOKUP ||
924 sslState_ == STATE_RSA_ASYNC_PENDING ||
925 sslState_ == STATE_ERROR ||
926 sslState_ == STATE_CLOSED
928 if (sslState_ == STATE_CLOSED) {
929 // I sure hope whoever closed this socket didn't delete it already,
930 // but this is not strictly speaking an error
933 if (sslState_ == STATE_ERROR) {
934 // go straight to fail if timeout expired during lookup
935 AsyncSocketException ex(AsyncSocketException::TIMED_OUT,
936 "SSL accept timed out");
937 failHandshake(__func__, ex);
940 sslState_ = STATE_ACCEPTING;
941 this->handleAccept();
945 AsyncSSLSocket::handleAccept() noexcept {
946 VLOG(3) << "AsyncSSLSocket::handleAccept() this=" << this
947 << ", fd=" << fd_ << ", state=" << int(state_) << ", "
948 << "sslState=" << sslState_ << ", events=" << eventFlags_;
950 assert(state_ == StateEnum::ESTABLISHED &&
951 sslState_ == STATE_ACCEPTING);
953 /* lazily create the SSL structure */
955 ssl_ = ctx_->createSSL();
956 } catch (std::exception &e) {
957 sslState_ = STATE_ERROR;
958 AsyncSocketException ex(AsyncSocketException::INTERNAL_ERROR,
959 "error calling SSLContext::createSSL()");
960 LOG(ERROR) << "AsyncSSLSocket::handleAccept(this=" << this
961 << ", fd=" << fd_ << "): " << e.what();
962 return failHandshake(__func__, ex);
964 SSL_set_fd(ssl_, fd_);
965 SSL_set_ex_data(ssl_, getSSLExDataIndex(), this);
967 applyVerificationOptions(ssl_);
970 if (server_ && parseClientHello_) {
971 SSL_set_msg_callback_arg(ssl_, this);
972 SSL_set_msg_callback(ssl_, &AsyncSSLSocket::clientHelloParsingCallback);
976 int ret = SSL_accept(ssl_);
979 if (willBlock(ret, &error)) {
982 sslState_ = STATE_ERROR;
983 SSLException ex(error, errno);
984 return failHandshake(__func__, ex);
988 handshakeComplete_ = true;
989 updateEventRegistration(0, EventHandler::READ | EventHandler::WRITE);
991 // Move into STATE_ESTABLISHED in the normal case that we are in
993 sslState_ = STATE_ESTABLISHED;
995 VLOG(3) << "AsyncSSLSocket " << this << ": fd " << fd_
996 << " successfully accepted; state=" << int(state_)
997 << ", sslState=" << sslState_ << ", events=" << eventFlags_;
999 // Remember the EventBase we are attached to, before we start invoking any
1000 // callbacks (since the callbacks may call detachEventBase()).
1001 EventBase* originalEventBase = eventBase_;
1003 // Call the accept callback.
1004 invokeHandshakeCB();
1006 // Note that the accept callback may have changed our state.
1007 // (set or unset the read callback, called write(), closed the socket, etc.)
1008 // The following code needs to handle these situations correctly.
1010 // If the socket has been closed, readCallback_ and writeReqHead_ will
1011 // always be nullptr, so that will prevent us from trying to read or write.
1013 // The main thing to check for is if eventBase_ is still originalEventBase.
1014 // If not, we have been detached from this event base, so we shouldn't
1015 // perform any more operations.
1016 if (eventBase_ != originalEventBase) {
1020 AsyncSocket::handleInitialReadWrite();
1024 AsyncSSLSocket::handleConnect() noexcept {
1025 VLOG(3) << "AsyncSSLSocket::handleConnect() this=" << this
1026 << ", fd=" << fd_ << ", state=" << int(state_) << ", "
1027 << "sslState=" << sslState_ << ", events=" << eventFlags_;
1029 if (state_ < StateEnum::ESTABLISHED) {
1030 return AsyncSocket::handleConnect();
1033 assert(state_ == StateEnum::ESTABLISHED &&
1034 sslState_ == STATE_CONNECTING);
1038 int ret = SSL_connect(ssl_);
1041 if (willBlock(ret, &error)) {
1044 sslState_ = STATE_ERROR;
1045 SSLException ex(error, errno);
1046 return failHandshake(__func__, ex);
1050 handshakeComplete_ = true;
1051 updateEventRegistration(0, EventHandler::READ | EventHandler::WRITE);
1053 // Move into STATE_ESTABLISHED in the normal case that we are in
1054 // STATE_CONNECTING.
1055 sslState_ = STATE_ESTABLISHED;
1057 VLOG(3) << "AsyncSSLSocket %p: fd %d successfully connected; "
1058 << "state=" << int(state_) << ", sslState=" << sslState_
1059 << ", events=" << eventFlags_;
1061 // Remember the EventBase we are attached to, before we start invoking any
1062 // callbacks (since the callbacks may call detachEventBase()).
1063 EventBase* originalEventBase = eventBase_;
1065 // Call the handshake callback.
1066 invokeHandshakeCB();
1068 // Note that the connect callback may have changed our state.
1069 // (set or unset the read callback, called write(), closed the socket, etc.)
1070 // The following code needs to handle these situations correctly.
1072 // If the socket has been closed, readCallback_ and writeReqHead_ will
1073 // always be nullptr, so that will prevent us from trying to read or write.
1075 // The main thing to check for is if eventBase_ is still originalEventBase.
1076 // If not, we have been detached from this event base, so we shouldn't
1077 // perform any more operations.
1078 if (eventBase_ != originalEventBase) {
1082 AsyncSocket::handleInitialReadWrite();
1085 void AsyncSSLSocket::setReadCB(ReadCallback *callback) {
1086 #ifdef SSL_MODE_MOVE_BUFFER_OWNERSHIP
1087 // turn on the buffer movable in openssl
1088 if (!isBufferMovable_ && callback != nullptr && callback->isBufferMovable()) {
1089 SSL_set_mode(ssl_, SSL_get_mode(ssl_) | SSL_MODE_MOVE_BUFFER_OWNERSHIP);
1090 isBufferMovable_ = true;
1094 AsyncSocket::setReadCB(callback);
1097 void AsyncSSLSocket::prepareReadBuffer(void** buf, size_t* buflen) noexcept {
1098 CHECK(readCallback_);
1099 if (isBufferMovable_) {
1103 // buf is necessary for SSLSocket without SSL_MODE_MOVE_BUFFER_OWNERSHIP
1104 readCallback_->getReadBuffer(buf, buflen);
1109 AsyncSSLSocket::handleRead() noexcept {
1110 VLOG(5) << "AsyncSSLSocket::handleRead() this=" << this << ", fd=" << fd_
1111 << ", state=" << int(state_) << ", "
1112 << "sslState=" << sslState_ << ", events=" << eventFlags_;
1113 if (state_ < StateEnum::ESTABLISHED) {
1114 return AsyncSocket::handleRead();
1118 if (sslState_ == STATE_ACCEPTING) {
1123 else if (sslState_ == STATE_CONNECTING) {
1130 AsyncSocket::handleRead();
1134 AsyncSSLSocket::performRead(void** buf, size_t* buflen, size_t* offset) {
1135 VLOG(4) << "AsyncSSLSocket::performRead() this=" << this
1136 << ", buf=" << *buf << ", buflen=" << *buflen;
1138 if (sslState_ == STATE_UNENCRYPTED) {
1139 return AsyncSocket::performRead(buf, buflen, offset);
1144 if (!isBufferMovable_) {
1145 bytes = SSL_read(ssl_, *buf, *buflen);
1147 #ifdef SSL_MODE_MOVE_BUFFER_OWNERSHIP
1149 bytes = SSL_read_buf(ssl_, buf, (int *) offset, (int *) buflen);
1153 if (server_ && renegotiateAttempted_) {
1154 LOG(ERROR) << "AsyncSSLSocket(fd=" << fd_ << ", state=" << int(state_)
1155 << ", sslstate=" << sslState_ << ", events=" << eventFlags_
1156 << "): client intitiated SSL renegotiation not permitted";
1157 // We pack our own SSLerr here with a dummy function
1158 errno = ERR_PACK(ERR_LIB_USER, TASYNCSSLSOCKET_F_PERFORM_READ,
1159 SSL_CLIENT_RENEGOTIATION_ATTEMPT);
1164 int error = SSL_get_error(ssl_, bytes);
1165 if (error == SSL_ERROR_WANT_READ) {
1166 // The caller will register for read event if not already.
1167 return READ_BLOCKING;
1168 } else if (error == SSL_ERROR_WANT_WRITE) {
1169 // TODO: Even though we are attempting to read data, SSL_read() may
1170 // need to write data if renegotiation is being performed. We currently
1171 // don't support this and just fail the read.
1172 LOG(ERROR) << "AsyncSSLSocket(fd=" << fd_ << ", state=" << int(state_)
1173 << ", sslState=" << sslState_ << ", events=" << eventFlags_
1174 << "): unsupported SSL renegotiation during read",
1175 errno = ERR_PACK(ERR_LIB_USER, TASYNCSSLSOCKET_F_PERFORM_READ,
1176 SSL_INVALID_RENEGOTIATION);
1180 // TODO: Fix this code so that it can return a proper error message
1181 // to the callback, rather than relying on AsyncSocket code which
1182 // can't handle SSL errors.
1183 long lastError = ERR_get_error();
1185 VLOG(6) << "AsyncSSLSocket(fd=" << fd_ << ", "
1186 << "state=" << state_ << ", "
1187 << "sslState=" << sslState_ << ", "
1188 << "events=" << std::hex << eventFlags_ << "): "
1189 << "bytes: " << bytes << ", "
1190 << "error: " << error << ", "
1191 << "errno: " << errno << ", "
1192 << "func: " << ERR_func_error_string(lastError) << ", "
1193 << "reason: " << ERR_reason_error_string(lastError);
1195 if (zero_return(error, bytes)) {
1198 if (error != SSL_ERROR_SYSCALL) {
1199 if ((unsigned long)lastError < 0x8000) {
1208 appBytesReceived_ += bytes;
1213 void AsyncSSLSocket::handleWrite() noexcept {
1214 VLOG(5) << "AsyncSSLSocket::handleWrite() this=" << this << ", fd=" << fd_
1215 << ", state=" << int(state_) << ", "
1216 << "sslState=" << sslState_ << ", events=" << eventFlags_;
1217 if (state_ < StateEnum::ESTABLISHED) {
1218 return AsyncSocket::handleWrite();
1221 if (sslState_ == STATE_ACCEPTING) {
1227 if (sslState_ == STATE_CONNECTING) {
1234 AsyncSocket::handleWrite();
1237 int AsyncSSLSocket::interpretSSLError(int rc, int error) {
1238 if (error == SSL_ERROR_WANT_READ) {
1239 // TODO: Even though we are attempting to write data, SSL_write() may
1240 // need to read data if renegotiation is being performed. We currently
1241 // don't support this and just fail the write.
1242 LOG(ERROR) << "AsyncSSLSocket(fd=" << fd_ << ", state=" << int(state_)
1243 << ", sslState=" << sslState_ << ", events=" << eventFlags_
1244 << "): " << "unsupported SSL renegotiation during write",
1245 errno = ERR_PACK(ERR_LIB_USER, TASYNCSSLSOCKET_F_PERFORM_WRITE,
1246 SSL_INVALID_RENEGOTIATION);
1250 // TODO: Fix this code so that it can return a proper error message
1251 // to the callback, rather than relying on AsyncSocket code which
1252 // can't handle SSL errors.
1253 long lastError = ERR_get_error();
1254 VLOG(3) << "ERROR: AsyncSSLSocket(fd=" << fd_ << ", state=" << int(state_)
1255 << ", sslState=" << sslState_ << ", events=" << eventFlags_ << "): "
1256 << "SSL error: " << error << ", errno: " << errno
1257 << ", func: " << ERR_func_error_string(lastError)
1258 << ", reason: " << ERR_reason_error_string(lastError);
1259 if (error != SSL_ERROR_SYSCALL) {
1260 if ((unsigned long)lastError < 0x8000) {
1267 if (!zero_return(error, rc)) {
1275 ssize_t AsyncSSLSocket::performWrite(const iovec* vec,
1278 uint32_t* countWritten,
1279 uint32_t* partialWritten) {
1280 if (sslState_ == STATE_UNENCRYPTED) {
1281 return AsyncSocket::performWrite(
1282 vec, count, flags, countWritten, partialWritten);
1284 if (sslState_ != STATE_ESTABLISHED) {
1285 LOG(ERROR) << "AsyncSSLSocket(fd=" << fd_ << ", state=" << int(state_)
1286 << ", sslState=" << sslState_
1287 << ", events=" << eventFlags_ << "): "
1288 << "TODO: AsyncSSLSocket currently does not support calling "
1289 << "write() before the handshake has fully completed";
1290 errno = ERR_PACK(ERR_LIB_USER, TASYNCSSLSOCKET_F_PERFORM_WRITE,
1295 bool cork = isSet(flags, WriteFlags::CORK);
1296 CorkGuard guard(fd_, count > 1, cork, &corked_);
1299 //#ifdef SSL_MODE_WRITE_IOVEC
1300 if (ssl_->expand == nullptr &&
1301 ssl_->compress == nullptr &&
1302 (ssl_->mode & SSL_MODE_WRITE_IOVEC)) {
1303 return performWriteIovec(vec, count, flags, countWritten, partialWritten);
1307 // Declare a buffer used to hold small write requests. It could point to a
1308 // memory block either on stack or on heap. If it is on heap, we release it
1309 // manually when scope exits
1310 char* combinedBuf{nullptr};
1312 // Note, always keep this check consistent with what we do below
1313 if (combinedBuf != nullptr && minWriteSize_ > MAX_STACK_BUF_SIZE) {
1314 delete[] combinedBuf;
1319 *partialWritten = 0;
1320 ssize_t totalWritten = 0;
1321 size_t bytesStolenFromNextBuffer = 0;
1322 for (uint32_t i = 0; i < count; i++) {
1323 const iovec* v = vec + i;
1324 size_t offset = bytesStolenFromNextBuffer;
1325 bytesStolenFromNextBuffer = 0;
1326 size_t len = v->iov_len - offset;
1332 buf = ((const char*)v->iov_base) + offset;
1336 uint32_t buffersStolen = 0;
1337 if ((len < minWriteSize_) && ((i + 1) < count)) {
1338 // Combine this buffer with part or all of the next buffers in
1339 // order to avoid really small-grained calls to SSL_write().
1340 // Each call to SSL_write() produces a separate record in
1341 // the egress SSL stream, and we've found that some low-end
1342 // mobile clients can't handle receiving an HTTP response
1343 // header and the first part of the response body in two
1344 // separate SSL records (even if those two records are in
1345 // the same TCP packet).
1347 if (combinedBuf == nullptr) {
1348 if (minWriteSize_ > MAX_STACK_BUF_SIZE) {
1349 // Allocate the buffer on heap
1350 combinedBuf = new char[minWriteSize_];
1352 // Allocate the buffer on stack
1353 combinedBuf = (char*)alloca(minWriteSize_);
1356 assert(combinedBuf != nullptr);
1358 memcpy(combinedBuf, buf, len);
1360 // INVARIANT: i + buffersStolen == complete chunks serialized
1361 uint32_t nextIndex = i + buffersStolen + 1;
1362 bytesStolenFromNextBuffer = std::min(vec[nextIndex].iov_len,
1363 minWriteSize_ - len);
1364 memcpy(combinedBuf + len, vec[nextIndex].iov_base,
1365 bytesStolenFromNextBuffer);
1366 len += bytesStolenFromNextBuffer;
1367 if (bytesStolenFromNextBuffer < vec[nextIndex].iov_len) {
1368 // couldn't steal the whole buffer
1371 bytesStolenFromNextBuffer = 0;
1374 } while ((i + buffersStolen + 1) < count && (len < minWriteSize_));
1375 bytes = eorAwareSSLWrite(
1376 ssl_, combinedBuf, len,
1377 (isSet(flags, WriteFlags::EOR) && i + buffersStolen + 1 == count));
1380 bytes = eorAwareSSLWrite(ssl_, buf, len,
1381 (isSet(flags, WriteFlags::EOR) && i + 1 == count));
1385 int error = SSL_get_error(ssl_, bytes);
1386 if (error == SSL_ERROR_WANT_WRITE) {
1387 // The caller will register for write event if not already.
1388 *partialWritten = offset;
1389 return totalWritten;
1391 int rc = interpretSSLError(bytes, error);
1394 } // else fall through to below to correctly record totalWritten
1397 totalWritten += bytes;
1399 if (bytes == (ssize_t)len) {
1400 // The full iovec is written.
1401 (*countWritten) += 1 + buffersStolen;
1405 bytes += offset; // adjust bytes to account for all of v
1406 while (bytes >= (ssize_t)v->iov_len) {
1407 // We combined this buf with part or all of the next one, and
1408 // we managed to write all of this buf but not all of the bytes
1409 // from the next one that we'd hoped to write.
1410 bytes -= v->iov_len;
1414 *partialWritten = bytes;
1415 return totalWritten;
1419 return totalWritten;
1423 //#ifdef SSL_MODE_WRITE_IOVEC
1424 ssize_t AsyncSSLSocket::performWriteIovec(const iovec* vec,
1427 uint32_t* countWritten,
1428 uint32_t* partialWritten) {
1430 for (uint32_t j = 0; j < count; j++) {
1431 tot += vec[j].iov_len;
1434 ssize_t totalWritten = SSL_write_iovec(ssl_, vec, count);
1437 *partialWritten = 0;
1438 if (totalWritten <= 0) {
1439 return interpretSSLError(totalWritten, SSL_get_error(ssl_, totalWritten));
1441 ssize_t bytes = totalWritten, i = 0;
1442 while (i < count && bytes >= (ssize_t)vec[i].iov_len) {
1443 // we managed to write all of this buf
1444 bytes -= vec[i].iov_len;
1448 *partialWritten = bytes;
1450 VLOG(4) << "SSL_write_iovec() writes " << tot
1451 << ", returns " << totalWritten << " bytes"
1452 << ", max_send_fragment=" << ssl_->max_send_fragment
1453 << ", count=" << count << ", countWritten=" << *countWritten;
1455 return totalWritten;
1460 int AsyncSSLSocket::eorAwareSSLWrite(SSL *ssl, const void *buf, int n,
1462 if (eor && SSL_get_wbio(ssl)->method == &eorAwareBioMethod) {
1463 if (appEorByteNo_) {
1464 // cannot track for more than one app byte EOR
1465 CHECK(appEorByteNo_ == appBytesWritten_ + n);
1467 appEorByteNo_ = appBytesWritten_ + n;
1470 // 1. It is fine to keep updating minEorRawByteNo_.
1471 // 2. It is _min_ in the sense that SSL record will add some overhead.
1472 minEorRawByteNo_ = getRawBytesWritten() + n;
1475 n = sslWriteImpl(ssl, buf, n);
1477 appBytesWritten_ += n;
1478 if (appEorByteNo_) {
1479 if (getRawBytesWritten() >= minEorRawByteNo_) {
1480 minEorRawByteNo_ = 0;
1482 if(appBytesWritten_ == appEorByteNo_) {
1485 CHECK(appBytesWritten_ < appEorByteNo_);
1493 AsyncSSLSocket::sslInfoCallback(const SSL *ssl, int where, int ret) {
1494 AsyncSSLSocket *sslSocket = AsyncSSLSocket::getFromSSL(ssl);
1495 if (sslSocket->handshakeComplete_ && (where & SSL_CB_HANDSHAKE_START)) {
1496 sslSocket->renegotiateAttempted_ = true;
1500 int AsyncSSLSocket::eorAwareBioWrite(BIO *b, const char *in, int inl) {
1505 AsyncSSLSocket *tsslSock;
1507 iov.iov_base = const_cast<char *>(in);
1509 memset(&msg, 0, sizeof(msg));
1514 reinterpret_cast<AsyncSSLSocket*>(BIO_get_app_data(b));
1516 tsslSock->minEorRawByteNo_ &&
1517 tsslSock->minEorRawByteNo_ <= BIO_number_written(b) + inl) {
1522 ret = sendmsg(b->num, &msg, flags);
1523 BIO_clear_retry_flags(b);
1525 if (BIO_sock_should_retry(ret))
1526 BIO_set_retry_write(b);
1531 int AsyncSSLSocket::sslVerifyCallback(int preverifyOk,
1532 X509_STORE_CTX* x509Ctx) {
1533 SSL* ssl = (SSL*) X509_STORE_CTX_get_ex_data(
1534 x509Ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
1535 AsyncSSLSocket* self = AsyncSSLSocket::getFromSSL(ssl);
1537 VLOG(3) << "AsyncSSLSocket::sslVerifyCallback() this=" << self << ", "
1538 << "fd=" << self->fd_ << ", preverifyOk=" << preverifyOk;
1539 return (self->handshakeCallback_) ?
1540 self->handshakeCallback_->handshakeVer(self, preverifyOk, x509Ctx) :
1544 void AsyncSSLSocket::enableClientHelloParsing() {
1545 parseClientHello_ = true;
1546 clientHelloInfo_.reset(new ClientHelloInfo());
1549 void AsyncSSLSocket::resetClientHelloParsing(SSL *ssl) {
1550 SSL_set_msg_callback(ssl, nullptr);
1551 SSL_set_msg_callback_arg(ssl, nullptr);
1552 clientHelloInfo_->clientHelloBuf_.clear();
1556 AsyncSSLSocket::clientHelloParsingCallback(int written, int version,
1557 int contentType, const void *buf, size_t len, SSL *ssl, void *arg)
1559 AsyncSSLSocket *sock = static_cast<AsyncSSLSocket*>(arg);
1561 sock->resetClientHelloParsing(ssl);
1564 if (contentType != SSL3_RT_HANDSHAKE) {
1565 sock->resetClientHelloParsing(ssl);
1572 auto& clientHelloBuf = sock->clientHelloInfo_->clientHelloBuf_;
1573 clientHelloBuf.append(IOBuf::wrapBuffer(buf, len));
1575 Cursor cursor(clientHelloBuf.front());
1576 if (cursor.read<uint8_t>() != SSL3_MT_CLIENT_HELLO) {
1577 sock->resetClientHelloParsing(ssl);
1581 if (cursor.totalLength() < 3) {
1582 clientHelloBuf.trimEnd(len);
1583 clientHelloBuf.append(IOBuf::copyBuffer(buf, len));
1587 uint32_t messageLength = cursor.read<uint8_t>();
1588 messageLength <<= 8;
1589 messageLength |= cursor.read<uint8_t>();
1590 messageLength <<= 8;
1591 messageLength |= cursor.read<uint8_t>();
1592 if (cursor.totalLength() < messageLength) {
1593 clientHelloBuf.trimEnd(len);
1594 clientHelloBuf.append(IOBuf::copyBuffer(buf, len));
1598 sock->clientHelloInfo_->clientHelloMajorVersion_ = cursor.read<uint8_t>();
1599 sock->clientHelloInfo_->clientHelloMinorVersion_ = cursor.read<uint8_t>();
1601 cursor.skip(4); // gmt_unix_time
1602 cursor.skip(28); // random_bytes
1604 cursor.skip(cursor.read<uint8_t>()); // session_id
1606 uint16_t cipherSuitesLength = cursor.readBE<uint16_t>();
1607 for (int i = 0; i < cipherSuitesLength; i += 2) {
1608 sock->clientHelloInfo_->
1609 clientHelloCipherSuites_.push_back(cursor.readBE<uint16_t>());
1612 uint8_t compressionMethodsLength = cursor.read<uint8_t>();
1613 for (int i = 0; i < compressionMethodsLength; ++i) {
1614 sock->clientHelloInfo_->
1615 clientHelloCompressionMethods_.push_back(cursor.readBE<uint8_t>());
1618 if (cursor.totalLength() > 0) {
1619 uint16_t extensionsLength = cursor.readBE<uint16_t>();
1620 while (extensionsLength) {
1621 TLSExtension extensionType = static_cast<TLSExtension>(
1622 cursor.readBE<uint16_t>());
1623 sock->clientHelloInfo_->
1624 clientHelloExtensions_.push_back(extensionType);
1625 extensionsLength -= 2;
1626 uint16_t extensionDataLength = cursor.readBE<uint16_t>();
1627 extensionsLength -= 2;
1629 if (extensionType == TLSExtension::SIGNATURE_ALGORITHMS) {
1631 extensionDataLength -= 2;
1632 while (extensionDataLength) {
1633 HashAlgorithm hashAlg = static_cast<HashAlgorithm>(
1634 cursor.readBE<uint8_t>());
1635 SignatureAlgorithm sigAlg = static_cast<SignatureAlgorithm>(
1636 cursor.readBE<uint8_t>());
1637 extensionDataLength -= 2;
1638 sock->clientHelloInfo_->
1639 clientHelloSigAlgs_.emplace_back(hashAlg, sigAlg);
1642 cursor.skip(extensionDataLength);
1643 extensionsLength -= extensionDataLength;
1647 } catch (std::out_of_range& e) {
1648 // we'll use what we found and cleanup below.
1649 VLOG(4) << "AsyncSSLSocket::clientHelloParsingCallback(): "
1650 << "buffer finished unexpectedly." << " AsyncSSLSocket socket=" << sock;
1653 sock->resetClientHelloParsing(ssl);