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;
58 using folly::SSLContext;
60 // We have one single dummy SSL context so that we can implement attach
61 // and detach methods in a thread safe fashion without modifying opnessl.
62 static SSLContext *dummyCtx = nullptr;
63 static SpinLock dummyCtxLock;
65 // Numbers chosen as to not collide with functions in ssl.h
66 const uint8_t TASYNCSSLSOCKET_F_PERFORM_READ = 90;
67 const uint8_t TASYNCSSLSOCKET_F_PERFORM_WRITE = 91;
69 // If given min write size is less than this, buffer will be allocated on
70 // stack, otherwise it is allocated on heap
71 const size_t MAX_STACK_BUF_SIZE = 2048;
73 // This converts "illegal" shutdowns into ZERO_RETURN
74 inline bool zero_return(int error, int rc) {
75 return (error == SSL_ERROR_ZERO_RETURN || (rc == 0 && errno == 0));
78 class AsyncSSLSocketConnector: public AsyncSocket::ConnectCallback,
79 public AsyncSSLSocket::HandshakeCB {
82 AsyncSSLSocket *sslSocket_;
83 AsyncSSLSocket::ConnectCallback *callback_;
88 ~AsyncSSLSocketConnector() override {}
91 AsyncSSLSocketConnector(AsyncSSLSocket *sslSocket,
92 AsyncSocket::ConnectCallback *callback,
94 sslSocket_(sslSocket),
97 startTime_(std::chrono::duration_cast<std::chrono::milliseconds>(
98 std::chrono::steady_clock::now().time_since_epoch()).count()) {
101 void connectSuccess() noexcept override {
102 VLOG(7) << "client socket connected";
104 int64_t timeoutLeft = 0;
106 auto curTime = std::chrono::duration_cast<std::chrono::milliseconds>(
107 std::chrono::steady_clock::now().time_since_epoch()).count();
109 timeoutLeft = timeout_ - (curTime - startTime_);
110 if (timeoutLeft <= 0) {
111 AsyncSocketException ex(AsyncSocketException::TIMED_OUT,
112 "SSL connect timed out");
118 sslSocket_->sslConn(this, timeoutLeft);
121 void connectErr(const AsyncSocketException& ex) noexcept override {
122 LOG(ERROR) << "TCP connect failed: " << ex.what();
127 void handshakeSuc(AsyncSSLSocket* sock) noexcept override {
128 VLOG(7) << "client handshake success";
130 callback_->connectSuccess();
135 void handshakeErr(AsyncSSLSocket* socket,
136 const AsyncSocketException& ex) noexcept override {
137 LOG(ERROR) << "client handshakeErr: " << ex.what();
142 void fail(const AsyncSocketException &ex) {
143 // fail is a noop if called twice
145 AsyncSSLSocket::ConnectCallback *cb = callback_;
149 sslSocket_->closeNow();
150 // closeNow can call handshakeErr if it hasn't been called already.
151 // So this may have been deleted, no member variable access beyond this
153 // Note that closeNow may invoke writeError callbacks if the socket had
154 // write data pending connection completion.
159 // XXX: implement an equivalent to corking for platforms with TCP_NOPUSH?
160 #ifdef TCP_CORK // Linux-only
162 * Utility class that corks a TCP socket upon construction or uncorks
163 * the socket upon destruction
165 class CorkGuard : private boost::noncopyable {
167 CorkGuard(int fd, bool multipleWrites, bool haveMore, bool* corked):
168 fd_(fd), haveMore_(haveMore), corked_(corked) {
170 // socket is already corked; nothing to do
173 if (multipleWrites || haveMore) {
174 // We are performing multiple writes in this performWrite() call,
175 // and/or there are more calls to performWrite() that will be invoked
176 // later, so enable corking
178 setsockopt(fd_, IPPROTO_TCP, TCP_CORK, &flag, sizeof(flag));
185 // more data to come; don't uncork yet
189 // socket isn't corked; nothing to do
194 setsockopt(fd_, IPPROTO_TCP, TCP_CORK, &flag, sizeof(flag));
204 class CorkGuard : private boost::noncopyable {
206 CorkGuard(int, bool, bool, bool*) {}
210 void setup_SSL_CTX(SSL_CTX *ctx) {
211 #ifdef SSL_MODE_RELEASE_BUFFERS
212 SSL_CTX_set_mode(ctx,
213 SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER |
214 SSL_MODE_ENABLE_PARTIAL_WRITE
215 | SSL_MODE_RELEASE_BUFFERS
218 SSL_CTX_set_mode(ctx,
219 SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER |
220 SSL_MODE_ENABLE_PARTIAL_WRITE
223 // SSL_CTX_set_mode is a Macro
224 #ifdef SSL_MODE_WRITE_IOVEC
225 SSL_CTX_set_mode(ctx,
226 SSL_CTX_get_mode(ctx)
227 | SSL_MODE_WRITE_IOVEC);
232 BIO_METHOD eorAwareBioMethod;
234 void* initEorBioMethod(void) {
235 memcpy(&eorAwareBioMethod, BIO_s_socket(), sizeof(eorAwareBioMethod));
236 // override the bwrite method for MSG_EOR support
237 eorAwareBioMethod.bwrite = AsyncSSLSocket::eorAwareBioWrite;
239 // Note that the eorAwareBioMethod.type and eorAwareBioMethod.name are not
240 // set here. openssl code seems to be checking ".type == BIO_TYPE_SOCKET" and
241 // then have specific handlings. The eorAwareBioWrite should be compatible
242 // with the one in openssl.
244 // Return something here to enable AsyncSSLSocket to call this method using
245 // a function-scoped static.
249 } // anonymous namespace
253 SSLException::SSLException(int sslError, int errno_copy):
254 AsyncSocketException(
255 AsyncSocketException::SSL_ERROR,
256 ERR_error_string(sslError, msg_),
257 sslError == SSL_ERROR_SYSCALL ? errno_copy : 0), error_(sslError) {}
260 * Create a client AsyncSSLSocket
262 AsyncSSLSocket::AsyncSSLSocket(const shared_ptr<SSLContext> &ctx,
263 EventBase* evb, bool deferSecurityNegotiation) :
266 handshakeTimeout_(this, evb) {
268 if (deferSecurityNegotiation) {
269 sslState_ = STATE_UNENCRYPTED;
274 * Create a server/client AsyncSSLSocket
276 AsyncSSLSocket::AsyncSSLSocket(const shared_ptr<SSLContext>& ctx,
277 EventBase* evb, int fd, bool server,
278 bool deferSecurityNegotiation) :
279 AsyncSocket(evb, fd),
282 handshakeTimeout_(this, evb) {
285 SSL_CTX_set_info_callback(ctx_->getSSLCtx(),
286 AsyncSSLSocket::sslInfoCallback);
288 if (deferSecurityNegotiation) {
289 sslState_ = STATE_UNENCRYPTED;
293 #if OPENSSL_VERSION_NUMBER >= 0x1000105fL && !defined(OPENSSL_NO_TLSEXT)
295 * Create a client AsyncSSLSocket and allow tlsext_hostname
296 * to be sent in Client Hello.
298 AsyncSSLSocket::AsyncSSLSocket(const shared_ptr<SSLContext> &ctx,
300 const std::string& serverName,
301 bool deferSecurityNegotiation) :
302 AsyncSSLSocket(ctx, evb, deferSecurityNegotiation) {
303 tlsextHostname_ = serverName;
307 * Create a client AsyncSSLSocket from an already connected fd
308 * and allow tlsext_hostname to be sent in Client Hello.
310 AsyncSSLSocket::AsyncSSLSocket(const shared_ptr<SSLContext>& ctx,
311 EventBase* evb, int fd,
312 const std::string& serverName,
313 bool deferSecurityNegotiation) :
314 AsyncSSLSocket(ctx, evb, fd, false, deferSecurityNegotiation) {
315 tlsextHostname_ = serverName;
319 AsyncSSLSocket::~AsyncSSLSocket() {
320 VLOG(3) << "actual destruction of AsyncSSLSocket(this=" << this
321 << ", evb=" << eventBase_ << ", fd=" << fd_
322 << ", state=" << int(state_) << ", sslState="
323 << sslState_ << ", events=" << eventFlags_ << ")";
326 void AsyncSSLSocket::init() {
327 // Do this here to ensure we initialize this once before any use of
328 // AsyncSSLSocket instances and not as part of library load.
329 static const auto eorAwareBioMethodInitializer = initEorBioMethod();
330 (void)eorAwareBioMethodInitializer;
332 setup_SSL_CTX(ctx_->getSSLCtx());
335 void AsyncSSLSocket::closeNow() {
336 // Close the SSL connection.
337 if (ssl_ != nullptr && fd_ != -1) {
338 int rc = SSL_shutdown(ssl_);
340 rc = SSL_shutdown(ssl_);
347 if (sslSession_ != nullptr) {
348 SSL_SESSION_free(sslSession_);
349 sslSession_ = nullptr;
352 sslState_ = STATE_CLOSED;
354 if (handshakeTimeout_.isScheduled()) {
355 handshakeTimeout_.cancelTimeout();
358 DestructorGuard dg(this);
361 AsyncSocketException(
362 AsyncSocketException::END_OF_FILE,
363 "SSL connection closed locally"));
365 if (ssl_ != nullptr) {
371 AsyncSocket::closeNow();
374 void AsyncSSLSocket::shutdownWrite() {
375 // SSL sockets do not support half-shutdown, so just perform a full shutdown.
377 // (Performing a full shutdown here is more desirable than doing nothing at
378 // all. The purpose of shutdownWrite() is normally to notify the other end
379 // of the connection that no more data will be sent. If we do nothing, the
380 // other end will never know that no more data is coming, and this may result
381 // in protocol deadlock.)
385 void AsyncSSLSocket::shutdownWriteNow() {
389 bool AsyncSSLSocket::good() const {
390 return (AsyncSocket::good() &&
391 (sslState_ == STATE_ACCEPTING || sslState_ == STATE_CONNECTING ||
392 sslState_ == STATE_ESTABLISHED || sslState_ == STATE_UNENCRYPTED));
395 // The TAsyncTransport definition of 'good' states that the transport is
396 // ready to perform reads and writes, so sslState_ == UNINIT must report !good.
397 // connecting can be true when the sslState_ == UNINIT because the AsyncSocket
398 // is connected but we haven't initiated the call to SSL_connect.
399 bool AsyncSSLSocket::connecting() const {
401 (AsyncSocket::connecting() ||
402 (AsyncSocket::good() && (sslState_ == STATE_UNINIT ||
403 sslState_ == STATE_CONNECTING))));
406 std::string AsyncSSLSocket::getApplicationProtocol() noexcept {
407 const unsigned char* protoName = nullptr;
408 unsigned protoLength;
409 if (getSelectedNextProtocolNoThrow(&protoName, &protoLength)) {
410 return std::string(reinterpret_cast<const char*>(protoName), protoLength);
415 bool AsyncSSLSocket::isEorTrackingEnabled() const {
416 if (ssl_ == nullptr) {
419 const BIO *wb = SSL_get_wbio(ssl_);
420 return wb && wb->method == &eorAwareBioMethod;
423 void AsyncSSLSocket::setEorTracking(bool track) {
424 BIO *wb = SSL_get_wbio(ssl_);
426 throw AsyncSocketException(AsyncSocketException::INVALID_STATE,
427 "setting EOR tracking without an initialized "
432 if (wb->method != &eorAwareBioMethod) {
433 // only do this if we didn't
434 wb->method = &eorAwareBioMethod;
435 BIO_set_app_data(wb, this);
437 minEorRawByteNo_ = 0;
439 } else if (wb->method == &eorAwareBioMethod) {
440 wb->method = BIO_s_socket();
441 BIO_set_app_data(wb, nullptr);
443 minEorRawByteNo_ = 0;
445 CHECK(wb->method == BIO_s_socket());
449 size_t AsyncSSLSocket::getRawBytesWritten() const {
451 if (!ssl_ || !(b = SSL_get_wbio(ssl_))) {
455 return BIO_number_written(b);
458 size_t AsyncSSLSocket::getRawBytesReceived() const {
460 if (!ssl_ || !(b = SSL_get_rbio(ssl_))) {
464 return BIO_number_read(b);
468 void AsyncSSLSocket::invalidState(HandshakeCB* callback) {
469 LOG(ERROR) << "AsyncSSLSocket(this=" << this << ", fd=" << fd_
470 << ", state=" << int(state_) << ", sslState=" << sslState_ << ", "
471 << "events=" << eventFlags_ << ", server=" << short(server_) << "): "
472 << "sslAccept/Connect() called in invalid "
473 << "state, handshake callback " << handshakeCallback_ << ", new callback "
475 assert(!handshakeTimeout_.isScheduled());
476 sslState_ = STATE_ERROR;
478 AsyncSocketException ex(AsyncSocketException::INVALID_STATE,
479 "sslAccept() called with socket in invalid state");
481 handshakeEndTime_ = std::chrono::steady_clock::now();
483 callback->handshakeErr(this, ex);
486 // Check the socket state not the ssl state here.
487 if (state_ != StateEnum::CLOSED || state_ != StateEnum::ERROR) {
488 failHandshake(__func__, ex);
492 void AsyncSSLSocket::sslAccept(HandshakeCB* callback, uint32_t timeout,
493 const SSLContext::SSLVerifyPeerEnum& verifyPeer) {
494 DestructorGuard dg(this);
495 assert(eventBase_->isInEventBaseThread());
496 verifyPeer_ = verifyPeer;
498 // Make sure we're in the uninitialized state
499 if (!server_ || (sslState_ != STATE_UNINIT &&
500 sslState_ != STATE_UNENCRYPTED) ||
501 handshakeCallback_ != nullptr) {
502 return invalidState(callback);
504 handshakeStartTime_ = std::chrono::steady_clock::now();
505 // Make end time at least >= start time.
506 handshakeEndTime_ = handshakeStartTime_;
508 sslState_ = STATE_ACCEPTING;
509 handshakeCallback_ = callback;
512 handshakeTimeout_.scheduleTimeout(timeout);
515 /* register for a read operation (waiting for CLIENT HELLO) */
516 updateEventRegistration(EventHandler::READ, EventHandler::WRITE);
519 #if OPENSSL_VERSION_NUMBER >= 0x009080bfL
520 void AsyncSSLSocket::attachSSLContext(
521 const std::shared_ptr<SSLContext>& ctx) {
523 // Check to ensure we are in client mode. Changing a server's ssl
524 // context doesn't make sense since clients of that server would likely
525 // become confused when the server's context changes.
529 DCHECK(ctx->getSSLCtx());
532 // In order to call attachSSLContext, detachSSLContext must have been
533 // previously called which sets the socket's context to the dummy
534 // context. Thus we must acquire this lock.
535 SpinLockGuard guard(dummyCtxLock);
536 SSL_set_SSL_CTX(ssl_, ctx->getSSLCtx());
539 void AsyncSSLSocket::detachSSLContext() {
542 // We aren't using the initial_ctx for now, and it can introduce race
543 // conditions in the destructor of the SSL object.
544 #ifndef OPENSSL_NO_TLSEXT
545 if (ssl_->initial_ctx) {
546 SSL_CTX_free(ssl_->initial_ctx);
547 ssl_->initial_ctx = nullptr;
550 SpinLockGuard guard(dummyCtxLock);
551 if (nullptr == dummyCtx) {
552 // We need to lazily initialize the dummy context so we don't
553 // accidentally override any programmatic settings to openssl
554 dummyCtx = new SSLContext;
556 // We must remove this socket's references to its context right now
557 // since this socket could get passed to any thread. If the context has
558 // had its locking disabled, just doing a set in attachSSLContext()
559 // would not be thread safe.
560 SSL_set_SSL_CTX(ssl_, dummyCtx->getSSLCtx());
564 #if OPENSSL_VERSION_NUMBER >= 0x1000105fL && !defined(OPENSSL_NO_TLSEXT)
565 void AsyncSSLSocket::switchServerSSLContext(
566 const std::shared_ptr<SSLContext>& handshakeCtx) {
568 if (sslState_ != STATE_ACCEPTING) {
569 // We log it here and allow the switch.
570 // It should not affect our re-negotiation support (which
571 // is not supported now).
572 VLOG(6) << "fd=" << getFd()
573 << " renegotation detected when switching SSL_CTX";
576 setup_SSL_CTX(handshakeCtx->getSSLCtx());
577 SSL_CTX_set_info_callback(handshakeCtx->getSSLCtx(),
578 AsyncSSLSocket::sslInfoCallback);
579 handshakeCtx_ = handshakeCtx;
580 SSL_set_SSL_CTX(ssl_, handshakeCtx->getSSLCtx());
583 bool AsyncSSLSocket::isServerNameMatch() const {
590 SSL_SESSION *ss = SSL_get_session(ssl_);
595 if(!ss->tlsext_hostname) {
598 return (tlsextHostname_.compare(ss->tlsext_hostname) ? false : true);
601 void AsyncSSLSocket::setServerName(std::string serverName) noexcept {
602 tlsextHostname_ = std::move(serverName);
607 void AsyncSSLSocket::timeoutExpired() noexcept {
608 if (state_ == StateEnum::ESTABLISHED &&
609 (sslState_ == STATE_CACHE_LOOKUP ||
610 sslState_ == STATE_RSA_ASYNC_PENDING)) {
611 sslState_ = STATE_ERROR;
612 // We are expecting a callback in restartSSLAccept. The cache lookup
613 // and rsa-call necessarily have pointers to this ssl socket, so delay
614 // the cleanup until he calls us back.
616 assert(state_ == StateEnum::ESTABLISHED &&
617 (sslState_ == STATE_CONNECTING || sslState_ == STATE_ACCEPTING));
618 DestructorGuard dg(this);
619 AsyncSocketException ex(AsyncSocketException::TIMED_OUT,
620 (sslState_ == STATE_CONNECTING) ?
621 "SSL connect timed out" : "SSL accept timed out");
622 failHandshake(__func__, ex);
626 int AsyncSSLSocket::getSSLExDataIndex() {
627 static auto index = SSL_get_ex_new_index(
628 0, (void*)"AsyncSSLSocket data index", nullptr, nullptr, nullptr);
632 AsyncSSLSocket* AsyncSSLSocket::getFromSSL(const SSL *ssl) {
633 return static_cast<AsyncSSLSocket *>(SSL_get_ex_data(ssl,
634 getSSLExDataIndex()));
637 void AsyncSSLSocket::failHandshake(const char* fn,
638 const AsyncSocketException& ex) {
640 if (handshakeTimeout_.isScheduled()) {
641 handshakeTimeout_.cancelTimeout();
643 invokeHandshakeErr(ex);
647 void AsyncSSLSocket::invokeHandshakeErr(const AsyncSocketException& ex) {
648 handshakeEndTime_ = std::chrono::steady_clock::now();
649 if (handshakeCallback_ != nullptr) {
650 HandshakeCB* callback = handshakeCallback_;
651 handshakeCallback_ = nullptr;
652 callback->handshakeErr(this, ex);
656 void AsyncSSLSocket::invokeHandshakeCB() {
657 handshakeEndTime_ = std::chrono::steady_clock::now();
658 if (handshakeTimeout_.isScheduled()) {
659 handshakeTimeout_.cancelTimeout();
661 if (handshakeCallback_) {
662 HandshakeCB* callback = handshakeCallback_;
663 handshakeCallback_ = nullptr;
664 callback->handshakeSuc(this);
668 void AsyncSSLSocket::connect(ConnectCallback* callback,
669 const folly::SocketAddress& address,
671 const OptionMap &options,
672 const folly::SocketAddress& bindAddr)
675 assert(state_ == StateEnum::UNINIT);
676 assert(sslState_ == STATE_UNINIT);
677 AsyncSSLSocketConnector *connector =
678 new AsyncSSLSocketConnector(this, callback, timeout);
679 AsyncSocket::connect(connector, address, timeout, options, bindAddr);
682 void AsyncSSLSocket::applyVerificationOptions(SSL * ssl) {
683 // apply the settings specified in verifyPeer_
684 if (verifyPeer_ == SSLContext::SSLVerifyPeerEnum::USE_CTX) {
685 if(ctx_->needsPeerVerification()) {
686 SSL_set_verify(ssl, ctx_->getVerificationMode(),
687 AsyncSSLSocket::sslVerifyCallback);
690 if (verifyPeer_ == SSLContext::SSLVerifyPeerEnum::VERIFY ||
691 verifyPeer_ == SSLContext::SSLVerifyPeerEnum::VERIFY_REQ_CLIENT_CERT) {
692 SSL_set_verify(ssl, SSLContext::getVerificationMode(verifyPeer_),
693 AsyncSSLSocket::sslVerifyCallback);
698 void AsyncSSLSocket::sslConn(HandshakeCB* callback, uint64_t timeout,
699 const SSLContext::SSLVerifyPeerEnum& verifyPeer) {
700 DestructorGuard dg(this);
701 assert(eventBase_->isInEventBaseThread());
703 verifyPeer_ = verifyPeer;
705 // Make sure we're in the uninitialized state
706 if (server_ || (sslState_ != STATE_UNINIT && sslState_ !=
707 STATE_UNENCRYPTED) ||
708 handshakeCallback_ != nullptr) {
709 return invalidState(callback);
712 handshakeStartTime_ = std::chrono::steady_clock::now();
713 // Make end time at least >= start time.
714 handshakeEndTime_ = handshakeStartTime_;
716 sslState_ = STATE_CONNECTING;
717 handshakeCallback_ = callback;
720 ssl_ = ctx_->createSSL();
721 } catch (std::exception &e) {
722 sslState_ = STATE_ERROR;
723 AsyncSocketException ex(AsyncSocketException::INTERNAL_ERROR,
724 "error calling SSLContext::createSSL()");
725 LOG(ERROR) << "AsyncSSLSocket::sslConn(this=" << this << ", fd="
726 << fd_ << "): " << e.what();
727 return failHandshake(__func__, ex);
730 applyVerificationOptions(ssl_);
732 SSL_set_fd(ssl_, fd_);
733 if (sslSession_ != nullptr) {
734 SSL_set_session(ssl_, sslSession_);
735 SSL_SESSION_free(sslSession_);
736 sslSession_ = nullptr;
738 #if OPENSSL_VERSION_NUMBER >= 0x1000105fL && !defined(OPENSSL_NO_TLSEXT)
739 if (tlsextHostname_.size()) {
740 SSL_set_tlsext_host_name(ssl_, tlsextHostname_.c_str());
744 SSL_set_ex_data(ssl_, getSSLExDataIndex(), this);
747 handshakeTimeout_.scheduleTimeout(timeout);
753 SSL_SESSION *AsyncSSLSocket::getSSLSession() {
754 if (ssl_ != nullptr && sslState_ == STATE_ESTABLISHED) {
755 return SSL_get1_session(ssl_);
761 void AsyncSSLSocket::setSSLSession(SSL_SESSION *session, bool takeOwnership) {
762 sslSession_ = session;
763 if (!takeOwnership && session != nullptr) {
764 // Increment the reference count
765 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION);
769 void AsyncSSLSocket::getSelectedNextProtocol(
770 const unsigned char** protoName,
772 SSLContext::NextProtocolType* protoType) const {
773 if (!getSelectedNextProtocolNoThrow(protoName, protoLen, protoType)) {
774 throw AsyncSocketException(AsyncSocketException::NOT_SUPPORTED,
775 "NPN not supported");
779 bool AsyncSSLSocket::getSelectedNextProtocolNoThrow(
780 const unsigned char** protoName,
782 SSLContext::NextProtocolType* protoType) const {
783 *protoName = nullptr;
785 #if OPENSSL_VERSION_NUMBER >= 0x1000200fL && !defined(OPENSSL_NO_TLSEXT)
786 SSL_get0_alpn_selected(ssl_, protoName, protoLen);
789 *protoType = SSLContext::NextProtocolType::ALPN;
794 #ifdef OPENSSL_NPN_NEGOTIATED
795 SSL_get0_next_proto_negotiated(ssl_, protoName, protoLen);
797 *protoType = SSLContext::NextProtocolType::NPN;
805 bool AsyncSSLSocket::getSSLSessionReused() const {
806 if (ssl_ != nullptr && sslState_ == STATE_ESTABLISHED) {
807 return SSL_session_reused(ssl_);
812 const char *AsyncSSLSocket::getNegotiatedCipherName() const {
813 return (ssl_ != nullptr) ? SSL_get_cipher_name(ssl_) : nullptr;
816 const char *AsyncSSLSocket::getSSLServerName() const {
817 #ifdef SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
818 return (ssl_ != nullptr) ? SSL_get_servername(ssl_, TLSEXT_NAMETYPE_host_name)
821 throw AsyncSocketException(AsyncSocketException::NOT_SUPPORTED,
822 "SNI not supported");
826 const char *AsyncSSLSocket::getSSLServerNameNoThrow() const {
828 return getSSLServerName();
829 } catch (AsyncSocketException& ex) {
834 int AsyncSSLSocket::getSSLVersion() const {
835 return (ssl_ != nullptr) ? SSL_version(ssl_) : 0;
838 const char *AsyncSSLSocket::getSSLCertSigAlgName() const {
839 X509 *cert = (ssl_ != nullptr) ? SSL_get_certificate(ssl_) : nullptr;
841 int nid = OBJ_obj2nid(cert->sig_alg->algorithm);
842 return OBJ_nid2ln(nid);
847 int AsyncSSLSocket::getSSLCertSize() const {
849 X509 *cert = (ssl_ != nullptr) ? SSL_get_certificate(ssl_) : nullptr;
851 EVP_PKEY *key = X509_get_pubkey(cert);
852 certSize = EVP_PKEY_bits(key);
858 bool AsyncSSLSocket::willBlock(int ret, int *errorOut) noexcept {
859 int error = *errorOut = SSL_get_error(ssl_, ret);
860 if (error == SSL_ERROR_WANT_READ) {
861 // Register for read event if not already.
862 updateEventRegistration(EventHandler::READ, EventHandler::WRITE);
864 } else if (error == SSL_ERROR_WANT_WRITE) {
865 VLOG(3) << "AsyncSSLSocket(fd=" << fd_
866 << ", state=" << int(state_) << ", sslState="
867 << sslState_ << ", events=" << eventFlags_ << "): "
868 << "SSL_ERROR_WANT_WRITE";
869 // Register for write event if not already.
870 updateEventRegistration(EventHandler::WRITE, EventHandler::READ);
872 #ifdef SSL_ERROR_WANT_SESS_CACHE_LOOKUP
873 } else if (error == SSL_ERROR_WANT_SESS_CACHE_LOOKUP) {
874 // We will block but we can't register our own socket. The callback that
875 // triggered this code will re-call handleAccept at the appropriate time.
877 // We can only get here if the linked libssl.so has support for this feature
878 // as well, otherwise SSL_get_error cannot return our error code.
879 sslState_ = STATE_CACHE_LOOKUP;
881 // Unregister for all events while blocked here
882 updateEventRegistration(EventHandler::NONE,
883 EventHandler::READ | EventHandler::WRITE);
885 // The timeout (if set) keeps running here
888 #ifdef SSL_ERROR_WANT_RSA_ASYNC_PENDING
889 } else if (error == SSL_ERROR_WANT_RSA_ASYNC_PENDING) {
890 // Our custom openssl function has kicked off an async request to do
891 // modular exponentiation. When that call returns, a callback will
892 // be invoked that will re-call handleAccept.
893 sslState_ = STATE_RSA_ASYNC_PENDING;
895 // Unregister for all events while blocked here
896 updateEventRegistration(
898 EventHandler::READ | EventHandler::WRITE
901 // The timeout (if set) keeps running here
905 // SSL_ERROR_ZERO_RETURN is processed here so we can get some detail
907 long lastError = ERR_get_error();
908 VLOG(6) << "AsyncSSLSocket(fd=" << fd_ << ", "
909 << "state=" << state_ << ", "
910 << "sslState=" << sslState_ << ", "
911 << "events=" << std::hex << eventFlags_ << "): "
912 << "SSL error: " << error << ", "
913 << "errno: " << errno << ", "
914 << "ret: " << ret << ", "
915 << "read: " << BIO_number_read(SSL_get_rbio(ssl_)) << ", "
916 << "written: " << BIO_number_written(SSL_get_wbio(ssl_)) << ", "
917 << "func: " << ERR_func_error_string(lastError) << ", "
918 << "reason: " << ERR_reason_error_string(lastError);
919 if (error != SSL_ERROR_SYSCALL) {
920 if (error == SSL_ERROR_SSL) {
921 *errorOut = lastError;
923 if ((unsigned long)lastError < 0x8000) {
934 void AsyncSSLSocket::checkForImmediateRead() noexcept {
935 // openssl may have buffered data that it read from the socket already.
936 // In this case we have to process it immediately, rather than waiting for
937 // the socket to become readable again.
938 if (ssl_ != nullptr && SSL_pending(ssl_) > 0) {
939 AsyncSocket::handleRead();
944 AsyncSSLSocket::restartSSLAccept()
946 VLOG(3) << "AsyncSSLSocket::restartSSLAccept() this=" << this << ", fd=" << fd_
947 << ", state=" << int(state_) << ", "
948 << "sslState=" << sslState_ << ", events=" << eventFlags_;
949 DestructorGuard dg(this);
951 sslState_ == STATE_CACHE_LOOKUP ||
952 sslState_ == STATE_RSA_ASYNC_PENDING ||
953 sslState_ == STATE_ERROR ||
954 sslState_ == STATE_CLOSED
956 if (sslState_ == STATE_CLOSED) {
957 // I sure hope whoever closed this socket didn't delete it already,
958 // but this is not strictly speaking an error
961 if (sslState_ == STATE_ERROR) {
962 // go straight to fail if timeout expired during lookup
963 AsyncSocketException ex(AsyncSocketException::TIMED_OUT,
964 "SSL accept timed out");
965 failHandshake(__func__, ex);
968 sslState_ = STATE_ACCEPTING;
969 this->handleAccept();
973 AsyncSSLSocket::handleAccept() noexcept {
974 VLOG(3) << "AsyncSSLSocket::handleAccept() this=" << this
975 << ", fd=" << fd_ << ", state=" << int(state_) << ", "
976 << "sslState=" << sslState_ << ", events=" << eventFlags_;
978 assert(state_ == StateEnum::ESTABLISHED &&
979 sslState_ == STATE_ACCEPTING);
981 /* lazily create the SSL structure */
983 ssl_ = ctx_->createSSL();
984 } catch (std::exception &e) {
985 sslState_ = STATE_ERROR;
986 AsyncSocketException ex(AsyncSocketException::INTERNAL_ERROR,
987 "error calling SSLContext::createSSL()");
988 LOG(ERROR) << "AsyncSSLSocket::handleAccept(this=" << this
989 << ", fd=" << fd_ << "): " << e.what();
990 return failHandshake(__func__, ex);
992 SSL_set_fd(ssl_, fd_);
993 SSL_set_ex_data(ssl_, getSSLExDataIndex(), this);
995 applyVerificationOptions(ssl_);
998 if (server_ && parseClientHello_) {
999 SSL_set_msg_callback(ssl_, &AsyncSSLSocket::clientHelloParsingCallback);
1000 SSL_set_msg_callback_arg(ssl_, this);
1004 int ret = SSL_accept(ssl_);
1007 if (willBlock(ret, &error)) {
1010 sslState_ = STATE_ERROR;
1011 SSLException ex(error, errno);
1012 return failHandshake(__func__, ex);
1016 handshakeComplete_ = true;
1017 updateEventRegistration(0, EventHandler::READ | EventHandler::WRITE);
1019 // Move into STATE_ESTABLISHED in the normal case that we are in
1021 sslState_ = STATE_ESTABLISHED;
1023 VLOG(3) << "AsyncSSLSocket " << this << ": fd " << fd_
1024 << " successfully accepted; state=" << int(state_)
1025 << ", sslState=" << sslState_ << ", events=" << eventFlags_;
1027 // Remember the EventBase we are attached to, before we start invoking any
1028 // callbacks (since the callbacks may call detachEventBase()).
1029 EventBase* originalEventBase = eventBase_;
1031 // Call the accept callback.
1032 invokeHandshakeCB();
1034 // Note that the accept callback may have changed our state.
1035 // (set or unset the read callback, called write(), closed the socket, etc.)
1036 // The following code needs to handle these situations correctly.
1038 // If the socket has been closed, readCallback_ and writeReqHead_ will
1039 // always be nullptr, so that will prevent us from trying to read or write.
1041 // The main thing to check for is if eventBase_ is still originalEventBase.
1042 // If not, we have been detached from this event base, so we shouldn't
1043 // perform any more operations.
1044 if (eventBase_ != originalEventBase) {
1048 AsyncSocket::handleInitialReadWrite();
1052 AsyncSSLSocket::handleConnect() noexcept {
1053 VLOG(3) << "AsyncSSLSocket::handleConnect() this=" << this
1054 << ", fd=" << fd_ << ", state=" << int(state_) << ", "
1055 << "sslState=" << sslState_ << ", events=" << eventFlags_;
1057 if (state_ < StateEnum::ESTABLISHED) {
1058 return AsyncSocket::handleConnect();
1061 assert(state_ == StateEnum::ESTABLISHED &&
1062 sslState_ == STATE_CONNECTING);
1066 int ret = SSL_connect(ssl_);
1069 if (willBlock(ret, &error)) {
1072 sslState_ = STATE_ERROR;
1073 SSLException ex(error, errno);
1074 return failHandshake(__func__, ex);
1078 handshakeComplete_ = true;
1079 updateEventRegistration(0, EventHandler::READ | EventHandler::WRITE);
1081 // Move into STATE_ESTABLISHED in the normal case that we are in
1082 // STATE_CONNECTING.
1083 sslState_ = STATE_ESTABLISHED;
1085 VLOG(3) << "AsyncSSLSocket %p: fd %d successfully connected; "
1086 << "state=" << int(state_) << ", sslState=" << sslState_
1087 << ", events=" << eventFlags_;
1089 // Remember the EventBase we are attached to, before we start invoking any
1090 // callbacks (since the callbacks may call detachEventBase()).
1091 EventBase* originalEventBase = eventBase_;
1093 // Call the handshake callback.
1094 invokeHandshakeCB();
1096 // Note that the connect callback may have changed our state.
1097 // (set or unset the read callback, called write(), closed the socket, etc.)
1098 // The following code needs to handle these situations correctly.
1100 // If the socket has been closed, readCallback_ and writeReqHead_ will
1101 // always be nullptr, so that will prevent us from trying to read or write.
1103 // The main thing to check for is if eventBase_ is still originalEventBase.
1104 // If not, we have been detached from this event base, so we shouldn't
1105 // perform any more operations.
1106 if (eventBase_ != originalEventBase) {
1110 AsyncSocket::handleInitialReadWrite();
1113 void AsyncSSLSocket::setReadCB(ReadCallback *callback) {
1114 #ifdef SSL_MODE_MOVE_BUFFER_OWNERSHIP
1115 // turn on the buffer movable in openssl
1116 if (ssl_ != nullptr && !isBufferMovable_ &&
1117 callback != nullptr && callback->isBufferMovable()) {
1118 SSL_set_mode(ssl_, SSL_get_mode(ssl_) | SSL_MODE_MOVE_BUFFER_OWNERSHIP);
1119 isBufferMovable_ = true;
1123 AsyncSocket::setReadCB(callback);
1126 void AsyncSSLSocket::prepareReadBuffer(void** buf, size_t* buflen) noexcept {
1127 CHECK(readCallback_);
1128 if (isBufferMovable_) {
1132 // buf is necessary for SSLSocket without SSL_MODE_MOVE_BUFFER_OWNERSHIP
1133 readCallback_->getReadBuffer(buf, buflen);
1138 AsyncSSLSocket::handleRead() noexcept {
1139 VLOG(5) << "AsyncSSLSocket::handleRead() this=" << this << ", fd=" << fd_
1140 << ", state=" << int(state_) << ", "
1141 << "sslState=" << sslState_ << ", events=" << eventFlags_;
1142 if (state_ < StateEnum::ESTABLISHED) {
1143 return AsyncSocket::handleRead();
1147 if (sslState_ == STATE_ACCEPTING) {
1152 else if (sslState_ == STATE_CONNECTING) {
1159 AsyncSocket::handleRead();
1163 AsyncSSLSocket::performRead(void** buf, size_t* buflen, size_t* offset) {
1164 VLOG(4) << "AsyncSSLSocket::performRead() this=" << this
1165 << ", buf=" << *buf << ", buflen=" << *buflen;
1167 if (sslState_ == STATE_UNENCRYPTED) {
1168 return AsyncSocket::performRead(buf, buflen, offset);
1173 if (!isBufferMovable_) {
1174 bytes = SSL_read(ssl_, *buf, *buflen);
1176 #ifdef SSL_MODE_MOVE_BUFFER_OWNERSHIP
1178 bytes = SSL_read_buf(ssl_, buf, (int *) offset, (int *) buflen);
1182 if (server_ && renegotiateAttempted_) {
1183 LOG(ERROR) << "AsyncSSLSocket(fd=" << fd_ << ", state=" << int(state_)
1184 << ", sslstate=" << sslState_ << ", events=" << eventFlags_
1185 << "): client intitiated SSL renegotiation not permitted";
1186 // We pack our own SSLerr here with a dummy function
1187 errno = ERR_PACK(ERR_LIB_USER, TASYNCSSLSOCKET_F_PERFORM_READ,
1188 SSL_CLIENT_RENEGOTIATION_ATTEMPT);
1193 int error = SSL_get_error(ssl_, bytes);
1194 if (error == SSL_ERROR_WANT_READ) {
1195 // The caller will register for read event if not already.
1196 if (errno == EWOULDBLOCK || errno == EAGAIN) {
1197 return READ_BLOCKING;
1201 } else if (error == SSL_ERROR_WANT_WRITE) {
1202 // TODO: Even though we are attempting to read data, SSL_read() may
1203 // need to write data if renegotiation is being performed. We currently
1204 // don't support this and just fail the read.
1205 LOG(ERROR) << "AsyncSSLSocket(fd=" << fd_ << ", state=" << int(state_)
1206 << ", sslState=" << sslState_ << ", events=" << eventFlags_
1207 << "): unsupported SSL renegotiation during read",
1208 errno = ERR_PACK(ERR_LIB_USER, TASYNCSSLSOCKET_F_PERFORM_READ,
1209 SSL_INVALID_RENEGOTIATION);
1213 // TODO: Fix this code so that it can return a proper error message
1214 // to the callback, rather than relying on AsyncSocket code which
1215 // can't handle SSL errors.
1216 long lastError = ERR_get_error();
1218 VLOG(6) << "AsyncSSLSocket(fd=" << fd_ << ", "
1219 << "state=" << state_ << ", "
1220 << "sslState=" << sslState_ << ", "
1221 << "events=" << std::hex << eventFlags_ << "): "
1222 << "bytes: " << bytes << ", "
1223 << "error: " << error << ", "
1224 << "errno: " << errno << ", "
1225 << "func: " << ERR_func_error_string(lastError) << ", "
1226 << "reason: " << ERR_reason_error_string(lastError);
1228 if (zero_return(error, bytes)) {
1231 if (error != SSL_ERROR_SYSCALL) {
1232 if ((unsigned long)lastError < 0x8000) {
1241 appBytesReceived_ += bytes;
1246 void AsyncSSLSocket::handleWrite() noexcept {
1247 VLOG(5) << "AsyncSSLSocket::handleWrite() this=" << this << ", fd=" << fd_
1248 << ", state=" << int(state_) << ", "
1249 << "sslState=" << sslState_ << ", events=" << eventFlags_;
1250 if (state_ < StateEnum::ESTABLISHED) {
1251 return AsyncSocket::handleWrite();
1254 if (sslState_ == STATE_ACCEPTING) {
1260 if (sslState_ == STATE_CONNECTING) {
1267 AsyncSocket::handleWrite();
1270 int AsyncSSLSocket::interpretSSLError(int rc, int error) {
1271 if (error == SSL_ERROR_WANT_READ) {
1272 // TODO: Even though we are attempting to write data, SSL_write() may
1273 // need to read data if renegotiation is being performed. We currently
1274 // don't support this and just fail the write.
1275 LOG(ERROR) << "AsyncSSLSocket(fd=" << fd_ << ", state=" << int(state_)
1276 << ", sslState=" << sslState_ << ", events=" << eventFlags_
1277 << "): " << "unsupported SSL renegotiation during write",
1278 errno = ERR_PACK(ERR_LIB_USER, TASYNCSSLSOCKET_F_PERFORM_WRITE,
1279 SSL_INVALID_RENEGOTIATION);
1283 // TODO: Fix this code so that it can return a proper error message
1284 // to the callback, rather than relying on AsyncSocket code which
1285 // can't handle SSL errors.
1286 long lastError = ERR_get_error();
1287 VLOG(3) << "ERROR: AsyncSSLSocket(fd=" << fd_ << ", state=" << int(state_)
1288 << ", sslState=" << sslState_ << ", events=" << eventFlags_ << "): "
1289 << "SSL error: " << error << ", errno: " << errno
1290 << ", func: " << ERR_func_error_string(lastError)
1291 << ", reason: " << ERR_reason_error_string(lastError);
1292 if (error != SSL_ERROR_SYSCALL) {
1293 if ((unsigned long)lastError < 0x8000) {
1300 if (!zero_return(error, rc)) {
1308 ssize_t AsyncSSLSocket::performWrite(const iovec* vec,
1311 uint32_t* countWritten,
1312 uint32_t* partialWritten) {
1313 if (sslState_ == STATE_UNENCRYPTED) {
1314 return AsyncSocket::performWrite(
1315 vec, count, flags, countWritten, partialWritten);
1317 if (sslState_ != STATE_ESTABLISHED) {
1318 LOG(ERROR) << "AsyncSSLSocket(fd=" << fd_ << ", state=" << int(state_)
1319 << ", sslState=" << sslState_
1320 << ", events=" << eventFlags_ << "): "
1321 << "TODO: AsyncSSLSocket currently does not support calling "
1322 << "write() before the handshake has fully completed";
1323 errno = ERR_PACK(ERR_LIB_USER, TASYNCSSLSOCKET_F_PERFORM_WRITE,
1328 bool cork = isSet(flags, WriteFlags::CORK) || persistentCork_;
1329 CorkGuard guard(fd_, count > 1, cork, &corked_);
1332 //#ifdef SSL_MODE_WRITE_IOVEC
1333 if (ssl_->expand == nullptr &&
1334 ssl_->compress == nullptr &&
1335 (ssl_->mode & SSL_MODE_WRITE_IOVEC)) {
1336 return performWriteIovec(vec, count, flags, countWritten, partialWritten);
1340 // Declare a buffer used to hold small write requests. It could point to a
1341 // memory block either on stack or on heap. If it is on heap, we release it
1342 // manually when scope exits
1343 char* combinedBuf{nullptr};
1345 // Note, always keep this check consistent with what we do below
1346 if (combinedBuf != nullptr && minWriteSize_ > MAX_STACK_BUF_SIZE) {
1347 delete[] combinedBuf;
1352 *partialWritten = 0;
1353 ssize_t totalWritten = 0;
1354 size_t bytesStolenFromNextBuffer = 0;
1355 for (uint32_t i = 0; i < count; i++) {
1356 const iovec* v = vec + i;
1357 size_t offset = bytesStolenFromNextBuffer;
1358 bytesStolenFromNextBuffer = 0;
1359 size_t len = v->iov_len - offset;
1365 buf = ((const char*)v->iov_base) + offset;
1369 uint32_t buffersStolen = 0;
1370 if ((len < minWriteSize_) && ((i + 1) < count)) {
1371 // Combine this buffer with part or all of the next buffers in
1372 // order to avoid really small-grained calls to SSL_write().
1373 // Each call to SSL_write() produces a separate record in
1374 // the egress SSL stream, and we've found that some low-end
1375 // mobile clients can't handle receiving an HTTP response
1376 // header and the first part of the response body in two
1377 // separate SSL records (even if those two records are in
1378 // the same TCP packet).
1380 if (combinedBuf == nullptr) {
1381 if (minWriteSize_ > MAX_STACK_BUF_SIZE) {
1382 // Allocate the buffer on heap
1383 combinedBuf = new char[minWriteSize_];
1385 // Allocate the buffer on stack
1386 combinedBuf = (char*)alloca(minWriteSize_);
1389 assert(combinedBuf != nullptr);
1391 memcpy(combinedBuf, buf, len);
1393 // INVARIANT: i + buffersStolen == complete chunks serialized
1394 uint32_t nextIndex = i + buffersStolen + 1;
1395 bytesStolenFromNextBuffer = std::min(vec[nextIndex].iov_len,
1396 minWriteSize_ - len);
1397 memcpy(combinedBuf + len, vec[nextIndex].iov_base,
1398 bytesStolenFromNextBuffer);
1399 len += bytesStolenFromNextBuffer;
1400 if (bytesStolenFromNextBuffer < vec[nextIndex].iov_len) {
1401 // couldn't steal the whole buffer
1404 bytesStolenFromNextBuffer = 0;
1407 } while ((i + buffersStolen + 1) < count && (len < minWriteSize_));
1408 bytes = eorAwareSSLWrite(
1409 ssl_, combinedBuf, len,
1410 (isSet(flags, WriteFlags::EOR) && i + buffersStolen + 1 == count));
1413 bytes = eorAwareSSLWrite(ssl_, buf, len,
1414 (isSet(flags, WriteFlags::EOR) && i + 1 == count));
1418 int error = SSL_get_error(ssl_, bytes);
1419 if (error == SSL_ERROR_WANT_WRITE) {
1420 // The caller will register for write event if not already.
1421 *partialWritten = offset;
1422 return totalWritten;
1424 int rc = interpretSSLError(bytes, error);
1427 } // else fall through to below to correctly record totalWritten
1430 totalWritten += bytes;
1432 if (bytes == (ssize_t)len) {
1433 // The full iovec is written.
1434 (*countWritten) += 1 + buffersStolen;
1438 bytes += offset; // adjust bytes to account for all of v
1439 while (bytes >= (ssize_t)v->iov_len) {
1440 // We combined this buf with part or all of the next one, and
1441 // we managed to write all of this buf but not all of the bytes
1442 // from the next one that we'd hoped to write.
1443 bytes -= v->iov_len;
1447 *partialWritten = bytes;
1448 return totalWritten;
1452 return totalWritten;
1456 //#ifdef SSL_MODE_WRITE_IOVEC
1457 ssize_t AsyncSSLSocket::performWriteIovec(const iovec* vec,
1460 uint32_t* countWritten,
1461 uint32_t* partialWritten) {
1463 for (uint32_t j = 0; j < count; j++) {
1464 tot += vec[j].iov_len;
1467 ssize_t totalWritten = SSL_write_iovec(ssl_, vec, count);
1470 *partialWritten = 0;
1471 if (totalWritten <= 0) {
1472 return interpretSSLError(totalWritten, SSL_get_error(ssl_, totalWritten));
1474 ssize_t bytes = totalWritten, i = 0;
1475 while (i < count && bytes >= (ssize_t)vec[i].iov_len) {
1476 // we managed to write all of this buf
1477 bytes -= vec[i].iov_len;
1481 *partialWritten = bytes;
1483 VLOG(4) << "SSL_write_iovec() writes " << tot
1484 << ", returns " << totalWritten << " bytes"
1485 << ", max_send_fragment=" << ssl_->max_send_fragment
1486 << ", count=" << count << ", countWritten=" << *countWritten;
1488 return totalWritten;
1493 int AsyncSSLSocket::eorAwareSSLWrite(SSL *ssl, const void *buf, int n,
1495 if (eor && SSL_get_wbio(ssl)->method == &eorAwareBioMethod) {
1496 if (appEorByteNo_) {
1497 // cannot track for more than one app byte EOR
1498 CHECK(appEorByteNo_ == appBytesWritten_ + n);
1500 appEorByteNo_ = appBytesWritten_ + n;
1503 // 1. It is fine to keep updating minEorRawByteNo_.
1504 // 2. It is _min_ in the sense that SSL record will add some overhead.
1505 minEorRawByteNo_ = getRawBytesWritten() + n;
1508 n = sslWriteImpl(ssl, buf, n);
1510 appBytesWritten_ += n;
1511 if (appEorByteNo_) {
1512 if (getRawBytesWritten() >= minEorRawByteNo_) {
1513 minEorRawByteNo_ = 0;
1515 if(appBytesWritten_ == appEorByteNo_) {
1518 CHECK(appBytesWritten_ < appEorByteNo_);
1526 AsyncSSLSocket::sslInfoCallback(const SSL *ssl, int where, int ret) {
1527 AsyncSSLSocket *sslSocket = AsyncSSLSocket::getFromSSL(ssl);
1528 if (sslSocket->handshakeComplete_ && (where & SSL_CB_HANDSHAKE_START)) {
1529 sslSocket->renegotiateAttempted_ = true;
1533 int AsyncSSLSocket::eorAwareBioWrite(BIO *b, const char *in, int inl) {
1538 AsyncSSLSocket *tsslSock;
1540 iov.iov_base = const_cast<char *>(in);
1542 memset(&msg, 0, sizeof(msg));
1547 reinterpret_cast<AsyncSSLSocket*>(BIO_get_app_data(b));
1549 tsslSock->minEorRawByteNo_ &&
1550 tsslSock->minEorRawByteNo_ <= BIO_number_written(b) + inl) {
1555 ret = sendmsg(b->num, &msg, flags);
1556 BIO_clear_retry_flags(b);
1558 if (BIO_sock_should_retry(ret))
1559 BIO_set_retry_write(b);
1564 int AsyncSSLSocket::sslVerifyCallback(int preverifyOk,
1565 X509_STORE_CTX* x509Ctx) {
1566 SSL* ssl = (SSL*) X509_STORE_CTX_get_ex_data(
1567 x509Ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
1568 AsyncSSLSocket* self = AsyncSSLSocket::getFromSSL(ssl);
1570 VLOG(3) << "AsyncSSLSocket::sslVerifyCallback() this=" << self << ", "
1571 << "fd=" << self->fd_ << ", preverifyOk=" << preverifyOk;
1572 return (self->handshakeCallback_) ?
1573 self->handshakeCallback_->handshakeVer(self, preverifyOk, x509Ctx) :
1577 void AsyncSSLSocket::enableClientHelloParsing() {
1578 parseClientHello_ = true;
1579 clientHelloInfo_.reset(new ClientHelloInfo());
1582 void AsyncSSLSocket::resetClientHelloParsing(SSL *ssl) {
1583 SSL_set_msg_callback(ssl, nullptr);
1584 SSL_set_msg_callback_arg(ssl, nullptr);
1585 clientHelloInfo_->clientHelloBuf_.clear();
1589 AsyncSSLSocket::clientHelloParsingCallback(int written, int version,
1590 int contentType, const void *buf, size_t len, SSL *ssl, void *arg)
1592 AsyncSSLSocket *sock = static_cast<AsyncSSLSocket*>(arg);
1594 sock->resetClientHelloParsing(ssl);
1597 if (contentType != SSL3_RT_HANDSHAKE) {
1604 auto& clientHelloBuf = sock->clientHelloInfo_->clientHelloBuf_;
1605 clientHelloBuf.append(IOBuf::wrapBuffer(buf, len));
1607 Cursor cursor(clientHelloBuf.front());
1608 if (cursor.read<uint8_t>() != SSL3_MT_CLIENT_HELLO) {
1609 sock->resetClientHelloParsing(ssl);
1613 if (cursor.totalLength() < 3) {
1614 clientHelloBuf.trimEnd(len);
1615 clientHelloBuf.append(IOBuf::copyBuffer(buf, len));
1619 uint32_t messageLength = cursor.read<uint8_t>();
1620 messageLength <<= 8;
1621 messageLength |= cursor.read<uint8_t>();
1622 messageLength <<= 8;
1623 messageLength |= cursor.read<uint8_t>();
1624 if (cursor.totalLength() < messageLength) {
1625 clientHelloBuf.trimEnd(len);
1626 clientHelloBuf.append(IOBuf::copyBuffer(buf, len));
1630 sock->clientHelloInfo_->clientHelloMajorVersion_ = cursor.read<uint8_t>();
1631 sock->clientHelloInfo_->clientHelloMinorVersion_ = cursor.read<uint8_t>();
1633 cursor.skip(4); // gmt_unix_time
1634 cursor.skip(28); // random_bytes
1636 cursor.skip(cursor.read<uint8_t>()); // session_id
1638 uint16_t cipherSuitesLength = cursor.readBE<uint16_t>();
1639 for (int i = 0; i < cipherSuitesLength; i += 2) {
1640 sock->clientHelloInfo_->
1641 clientHelloCipherSuites_.push_back(cursor.readBE<uint16_t>());
1644 uint8_t compressionMethodsLength = cursor.read<uint8_t>();
1645 for (int i = 0; i < compressionMethodsLength; ++i) {
1646 sock->clientHelloInfo_->
1647 clientHelloCompressionMethods_.push_back(cursor.readBE<uint8_t>());
1650 if (cursor.totalLength() > 0) {
1651 uint16_t extensionsLength = cursor.readBE<uint16_t>();
1652 while (extensionsLength) {
1653 TLSExtension extensionType = static_cast<TLSExtension>(
1654 cursor.readBE<uint16_t>());
1655 sock->clientHelloInfo_->
1656 clientHelloExtensions_.push_back(extensionType);
1657 extensionsLength -= 2;
1658 uint16_t extensionDataLength = cursor.readBE<uint16_t>();
1659 extensionsLength -= 2;
1661 if (extensionType == TLSExtension::SIGNATURE_ALGORITHMS) {
1663 extensionDataLength -= 2;
1664 while (extensionDataLength) {
1665 HashAlgorithm hashAlg = static_cast<HashAlgorithm>(
1666 cursor.readBE<uint8_t>());
1667 SignatureAlgorithm sigAlg = static_cast<SignatureAlgorithm>(
1668 cursor.readBE<uint8_t>());
1669 extensionDataLength -= 2;
1670 sock->clientHelloInfo_->
1671 clientHelloSigAlgs_.emplace_back(hashAlg, sigAlg);
1674 cursor.skip(extensionDataLength);
1675 extensionsLength -= extensionDataLength;
1679 } catch (std::out_of_range& e) {
1680 // we'll use what we found and cleanup below.
1681 VLOG(4) << "AsyncSSLSocket::clientHelloParsingCallback(): "
1682 << "buffer finished unexpectedly." << " AsyncSSLSocket socket=" << sock;
1685 sock->resetClientHelloParsing(ssl);