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a23223bf | 1 | /* |
ef57eb7b | 2 | * Copyright (C) 1996-2016 The Squid Software Foundation and contributors |
a23223bf | 3 | * |
bbc27441 AJ |
4 | * Squid software is distributed under GPLv2+ license and includes |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
a23223bf CT |
7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 17 Request Forwarding */ |
10 | ||
a23223bf CT |
11 | #include "squid.h" |
12 | #include "acl/FilledChecklist.h" | |
13 | #include "base/AsyncCbdataCalls.h" | |
14 | #include "CachePeer.h" | |
15 | #include "client_side.h" | |
16 | #include "comm/Loops.h" | |
17 | #include "errorpage.h" | |
18 | #include "fde.h" | |
19 | #include "globals.h" | |
24438ec5 | 20 | #include "helper/ResultCode.h" |
a23223bf CT |
21 | #include "HttpRequest.h" |
22 | #include "neighbors.h" | |
2bcab852 | 23 | #include "security/NegotiationHistory.h" |
7f4e9b73 | 24 | #include "SquidConfig.h" |
31855516 | 25 | #include "ssl/bio.h" |
a23223bf CT |
26 | #include "ssl/cert_validate_message.h" |
27 | #include "ssl/Config.h" | |
28 | #include "ssl/ErrorDetail.h" | |
29 | #include "ssl/helper.h" | |
30 | #include "ssl/PeerConnector.h" | |
31 | #include "ssl/ServerBump.h" | |
32 | #include "ssl/support.h" | |
a23223bf CT |
33 | |
34 | CBDATA_NAMESPACED_CLASS_INIT(Ssl, PeerConnector); | |
1b091aec CT |
35 | CBDATA_NAMESPACED_CLASS_INIT(Ssl, BlindPeerConnector); |
36 | CBDATA_NAMESPACED_CLASS_INIT(Ssl, PeekingPeerConnector); | |
a23223bf | 37 | |
37611b26 | 38 | Ssl::PeerConnector::PeerConnector(const Comm::ConnectionPointer &aServerConn, AsyncCall::Pointer &aCallback, const time_t timeout) : |
f53969cc | 39 | AsyncJob("Ssl::PeerConnector"), |
f53969cc | 40 | serverConn(aServerConn), |
79fe57c2 | 41 | certErrors(NULL), |
f53969cc SM |
42 | callback(aCallback), |
43 | negotiationTimeout(timeout), | |
44 | startTime(squid_curtime), | |
1b091aec | 45 | useCertValidator_(false) |
a23223bf CT |
46 | { |
47 | // if this throws, the caller's cb dialer is not our CbDialer | |
48 | Must(dynamic_cast<CbDialer*>(callback->getDialer())); | |
49 | } | |
50 | ||
51 | Ssl::PeerConnector::~PeerConnector() | |
52 | { | |
1b091aec | 53 | cbdataReferenceDone(certErrors); |
a23223bf CT |
54 | debugs(83, 5, "Peer connector " << this << " gone"); |
55 | } | |
56 | ||
57 | bool Ssl::PeerConnector::doneAll() const | |
58 | { | |
59 | return (!callback || callback->canceled()) && AsyncJob::doneAll(); | |
60 | } | |
61 | ||
62 | /// Preps connection and SSL state. Calls negotiate(). | |
63 | void | |
64 | Ssl::PeerConnector::start() | |
65 | { | |
66 | AsyncJob::start(); | |
67 | ||
1b091aec | 68 | if (prepareSocket() && (initializeSsl() != NULL)) |
a23223bf | 69 | negotiateSsl(); |
a23223bf CT |
70 | } |
71 | ||
72 | void | |
73 | Ssl::PeerConnector::commCloseHandler(const CommCloseCbParams ¶ms) | |
74 | { | |
75 | debugs(83, 5, "FD " << params.fd << ", Ssl::PeerConnector=" << params.data); | |
76 | connectionClosed("Ssl::PeerConnector::commCloseHandler"); | |
77 | } | |
78 | ||
79 | void | |
80 | Ssl::PeerConnector::connectionClosed(const char *reason) | |
81 | { | |
82 | mustStop(reason); | |
83 | callback = NULL; | |
84 | } | |
85 | ||
86 | bool | |
87 | Ssl::PeerConnector::prepareSocket() | |
88 | { | |
89 | const int fd = serverConnection()->fd; | |
90 | if (!Comm::IsConnOpen(serverConn) || fd_table[serverConn->fd].closing()) { | |
91 | connectionClosed("Ssl::PeerConnector::prepareSocket"); | |
92 | return false; | |
93 | } | |
94 | ||
95 | // watch for external connection closures | |
96 | typedef CommCbMemFunT<Ssl::PeerConnector, CommCloseCbParams> Dialer; | |
97 | closeHandler = JobCallback(9, 5, Dialer, this, Ssl::PeerConnector::commCloseHandler); | |
98 | comm_add_close_handler(fd, closeHandler); | |
99 | return true; | |
100 | } | |
101 | ||
1b091aec | 102 | SSL * |
a23223bf CT |
103 | Ssl::PeerConnector::initializeSsl() |
104 | { | |
96993ee0 | 105 | Security::ContextPtr sslContext(getSslContext()); |
a23223bf CT |
106 | assert(sslContext); |
107 | ||
1b091aec CT |
108 | const int fd = serverConnection()->fd; |
109 | ||
31855516 CT |
110 | SSL *ssl = Ssl::CreateClient(sslContext, fd, "server https start"); |
111 | if (!ssl) { | |
a23223bf CT |
112 | ErrorState *anErr = new ErrorState(ERR_SOCKET_FAILURE, Http::scInternalServerError, request.getRaw()); |
113 | anErr->xerrno = errno; | |
114 | debugs(83, DBG_IMPORTANT, "Error allocating SSL handle: " << ERR_error_string(ERR_get_error(), NULL)); | |
76b64c80 | 115 | |
1b091aec CT |
116 | noteNegotiationDone(anErr); |
117 | bail(anErr); | |
118 | return NULL; | |
a23223bf CT |
119 | } |
120 | ||
121 | // If CertValidation Helper used do not lookup checklist for errors, | |
122 | // but keep a list of errors to send it to CertValidator | |
123 | if (!Ssl::TheConfig.ssl_crt_validator) { | |
124 | // Create the ACL check list now, while we have access to more info. | |
125 | // The list is used in ssl_verify_cb() and is freed in ssl_free(). | |
126 | if (acl_access *acl = ::Config.ssl_client.cert_error) { | |
127 | ACLFilledChecklist *check = new ACLFilledChecklist(acl, request.getRaw(), dash_str); | |
128 | // check->fd(fd); XXX: need client FD here | |
129 | SSL_set_ex_data(ssl, ssl_ex_index_cert_error_check, check); | |
130 | } | |
131 | } | |
1b091aec | 132 | return ssl; |
a23223bf CT |
133 | } |
134 | ||
8aec3e1b CT |
135 | void |
136 | Ssl::PeerConnector::setReadTimeout() | |
137 | { | |
138 | int timeToRead; | |
139 | if (negotiationTimeout) { | |
140 | const int timeUsed = squid_curtime - startTime; | |
141 | const int timeLeft = max(0, static_cast<int>(negotiationTimeout - timeUsed)); | |
142 | timeToRead = min(static_cast<int>(::Config.Timeout.read), timeLeft); | |
143 | } else | |
144 | timeToRead = ::Config.Timeout.read; | |
145 | AsyncCall::Pointer nil; | |
146 | commSetConnTimeout(serverConnection(), timeToRead, nil); | |
147 | } | |
148 | ||
a23223bf CT |
149 | void |
150 | Ssl::PeerConnector::negotiateSsl() | |
151 | { | |
152 | if (!Comm::IsConnOpen(serverConnection()) || fd_table[serverConnection()->fd].closing()) | |
153 | return; | |
154 | ||
155 | const int fd = serverConnection()->fd; | |
156 | SSL *ssl = fd_table[fd].ssl; | |
157 | const int result = SSL_connect(ssl); | |
158 | if (result <= 0) { | |
159 | handleNegotiateError(result); | |
160 | return; // we might be gone by now | |
161 | } | |
162 | ||
c91d4d4e CT |
163 | if (!sslFinalized()) |
164 | return; | |
165 | ||
166 | callBack(); | |
167 | } | |
168 | ||
169 | bool | |
170 | Ssl::PeerConnector::sslFinalized() | |
171 | { | |
1b091aec CT |
172 | if (Ssl::TheConfig.ssl_crt_validator && useCertValidator_) { |
173 | const int fd = serverConnection()->fd; | |
174 | SSL *ssl = fd_table[fd].ssl; | |
a23223bf | 175 | |
a23223bf CT |
176 | Ssl::CertValidationRequest validationRequest; |
177 | // WARNING: Currently we do not use any locking for any of the | |
178 | // members of the Ssl::CertValidationRequest class. In this code the | |
179 | // Ssl::CertValidationRequest object used only to pass data to | |
180 | // Ssl::CertValidationHelper::submit method. | |
181 | validationRequest.ssl = ssl; | |
5c51bffb | 182 | validationRequest.domainName = request->url.host(); |
a23223bf CT |
183 | if (Ssl::CertErrors *errs = static_cast<Ssl::CertErrors *>(SSL_get_ex_data(ssl, ssl_ex_index_ssl_errors))) |
184 | // validationRequest disappears on return so no need to cbdataReference | |
185 | validationRequest.errors = errs; | |
186 | else | |
187 | validationRequest.errors = NULL; | |
188 | try { | |
189 | debugs(83, 5, "Sending SSL certificate for validation to ssl_crtvd."); | |
0e208dad CT |
190 | AsyncCall::Pointer call = asyncCall(83,5, "Ssl::PeerConnector::sslCrtvdHandleReply", Ssl::CertValidationHelper::CbDialer(this, &Ssl::PeerConnector::sslCrtvdHandleReply, nullptr)); |
191 | Ssl::CertValidationHelper::GetInstance()->sslSubmit(validationRequest, call); | |
c91d4d4e | 192 | return false; |
a23223bf CT |
193 | } catch (const std::exception &e) { |
194 | debugs(83, DBG_IMPORTANT, "ERROR: Failed to compose ssl_crtvd " << | |
195 | "request for " << validationRequest.domainName << | |
196 | " certificate: " << e.what() << "; will now block to " << | |
197 | "validate that certificate."); | |
198 | // fall through to do blocking in-process generation. | |
199 | ErrorState *anErr = new ErrorState(ERR_GATEWAY_FAILURE, Http::scInternalServerError, request.getRaw()); | |
1b091aec CT |
200 | |
201 | noteNegotiationDone(anErr); | |
a23223bf | 202 | bail(anErr); |
a23223bf | 203 | serverConn->close(); |
c91d4d4e | 204 | return true; |
a23223bf CT |
205 | } |
206 | } | |
1b091aec CT |
207 | |
208 | noteNegotiationDone(NULL); | |
c91d4d4e | 209 | return true; |
a23223bf CT |
210 | } |
211 | ||
c91d4d4e | 212 | void switchToTunnel(HttpRequest *request, Comm::ConnectionPointer & clientConn, Comm::ConnectionPointer &srvConn); |
7f4e9b73 | 213 | |
31855516 | 214 | void |
1b091aec | 215 | Ssl::PeekingPeerConnector::cbCheckForPeekAndSpliceDone(allow_t answer, void *data) |
7f4e9b73 | 216 | { |
1b091aec | 217 | Ssl::PeekingPeerConnector *peerConnect = (Ssl::PeekingPeerConnector *) data; |
566f8310 AR |
218 | // Use job calls to add done() checks and other job logic/protections. |
219 | CallJobHere1(83, 7, CbcPointer<PeekingPeerConnector>(peerConnect), Ssl::PeekingPeerConnector, checkForPeekAndSpliceDone, answer); | |
220 | } | |
221 | ||
222 | void | |
223 | Ssl::PeekingPeerConnector::checkForPeekAndSpliceDone(allow_t answer) | |
224 | { | |
225 | const Ssl::BumpMode finalAction = (answer.code == ACCESS_ALLOWED) ? | |
2d5fa7fa SM |
226 | static_cast<Ssl::BumpMode>(answer.kind): |
227 | checkForPeekAndSpliceGuess(); | |
566f8310 | 228 | checkForPeekAndSpliceMatched(finalAction); |
7f4e9b73 CT |
229 | } |
230 | ||
a9c2dd2f | 231 | void |
1b091aec | 232 | Ssl::PeekingPeerConnector::checkForPeekAndSplice() |
31855516 | 233 | { |
5d65362c CT |
234 | // Mark Step3 of bumping |
235 | if (request->clientConnectionManager.valid()) { | |
236 | if (Ssl::ServerBump *serverBump = request->clientConnectionManager->serverBump()) { | |
237 | serverBump->step = Ssl::bumpStep3; | |
238 | } | |
239 | } | |
240 | ||
69f69080 CT |
241 | handleServerCertificate(); |
242 | ||
a9c2dd2f CT |
243 | ACLFilledChecklist *acl_checklist = new ACLFilledChecklist( |
244 | ::Config.accessList.ssl_bump, | |
245 | request.getRaw(), NULL); | |
640fe8fb CT |
246 | acl_checklist->banAction(allow_t(ACCESS_ALLOWED, Ssl::bumpNone)); |
247 | acl_checklist->banAction(allow_t(ACCESS_ALLOWED, Ssl::bumpPeek)); | |
248 | acl_checklist->banAction(allow_t(ACCESS_ALLOWED, Ssl::bumpStare)); | |
249 | acl_checklist->banAction(allow_t(ACCESS_ALLOWED, Ssl::bumpClientFirst)); | |
250 | acl_checklist->banAction(allow_t(ACCESS_ALLOWED, Ssl::bumpServerFirst)); | |
251 | SSL *ssl = fd_table[serverConn->fd].ssl; | |
252 | BIO *b = SSL_get_rbio(ssl); | |
253 | Ssl::ServerBio *srvBio = static_cast<Ssl::ServerBio *>(b->ptr); | |
254 | if (!srvBio->canSplice()) | |
255 | acl_checklist->banAction(allow_t(ACCESS_ALLOWED, Ssl::bumpSplice)); | |
256 | if (!srvBio->canBump()) | |
257 | acl_checklist->banAction(allow_t(ACCESS_ALLOWED, Ssl::bumpBump)); | |
1b091aec | 258 | acl_checklist->nonBlockingCheck(Ssl::PeekingPeerConnector::cbCheckForPeekAndSpliceDone, this); |
a9c2dd2f | 259 | } |
789dda8d | 260 | |
a9c2dd2f | 261 | void |
566f8310 | 262 | Ssl::PeekingPeerConnector::checkForPeekAndSpliceMatched(const Ssl::BumpMode action) |
a9c2dd2f CT |
263 | { |
264 | SSL *ssl = fd_table[serverConn->fd].ssl; | |
31855516 CT |
265 | BIO *b = SSL_get_rbio(ssl); |
266 | Ssl::ServerBio *srvBio = static_cast<Ssl::ServerBio *>(b->ptr); | |
8693472e | 267 | debugs(83,5, "Will check for peek and splice on FD " << serverConn->fd); |
7f4e9b73 | 268 | |
a9c2dd2f | 269 | Ssl::BumpMode finalAction = action; |
640fe8fb | 270 | Must(finalAction == Ssl::bumpSplice || finalAction == Ssl::bumpBump || finalAction == Ssl::bumpTerminate); |
a9c2dd2f | 271 | // Record final decision |
68bd0182 | 272 | if (request->clientConnectionManager.valid()) { |
a9c2dd2f | 273 | request->clientConnectionManager->sslBumpMode = finalAction; |
68bd0182 CT |
274 | request->clientConnectionManager->serverBump()->act.step3 = finalAction; |
275 | } | |
a9c2dd2f CT |
276 | |
277 | if (finalAction == Ssl::bumpTerminate) { | |
b54a7c5a CT |
278 | serverConn->close(); |
279 | clientConn->close(); | |
a9c2dd2f | 280 | } else if (finalAction != Ssl::bumpSplice) { |
31855516 CT |
281 | //Allow write, proceed with the connection |
282 | srvBio->holdWrite(false); | |
283 | srvBio->recordInput(false); | |
8693472e | 284 | debugs(83,5, "Retry the fwdNegotiateSSL on FD " << serverConn->fd); |
1b091aec | 285 | Ssl::PeerConnector::noteWantWrite(); |
93ead3fd | 286 | } else { |
c91d4d4e | 287 | splice = true; |
f53969cc | 288 | // Ssl Negotiation stops here. Last SSL checks for valid certificates |
c91d4d4e | 289 | // and if done, switch to tunnel mode |
1b091aec CT |
290 | if (sslFinalized()) { |
291 | debugs(83,5, "Abort NegotiateSSL on FD " << serverConn->fd << " and splice the connection"); | |
292 | } | |
31855516 CT |
293 | } |
294 | } | |
295 | ||
566f8310 AR |
296 | Ssl::BumpMode |
297 | Ssl::PeekingPeerConnector::checkForPeekAndSpliceGuess() const | |
298 | { | |
299 | if (const ConnStateData *csd = request->clientConnectionManager.valid()) { | |
300 | const Ssl::BumpMode currentMode = csd->sslBumpMode; | |
301 | if (currentMode == Ssl::bumpStare) { | |
302 | debugs(83,5, "default to bumping after staring"); | |
303 | return Ssl::bumpBump; | |
304 | } | |
305 | debugs(83,5, "default to splicing after " << currentMode); | |
306 | } else { | |
307 | debugs(83,3, "default to splicing due to missing info"); | |
308 | } | |
309 | ||
310 | return Ssl::bumpSplice; | |
311 | } | |
312 | ||
a23223bf | 313 | void |
0e208dad | 314 | Ssl::PeerConnector::sslCrtvdHandleReply(Ssl::CertValidationResponse::Pointer validationResponse) |
a23223bf | 315 | { |
0e208dad | 316 | Must(validationResponse != NULL); |
a23223bf | 317 | |
a23223bf CT |
318 | Ssl::CertErrors *errs = NULL; |
319 | Ssl::ErrorDetail *errDetails = NULL; | |
320 | bool validatorFailed = false; | |
321 | if (!Comm::IsConnOpen(serverConnection())) { | |
322 | return; | |
323 | } | |
324 | ||
0e208dad | 325 | debugs(83,5, request->url.host() << " cert validation result: " << validationResponse->resultCode); |
a23223bf | 326 | |
0e208dad CT |
327 | if (validationResponse->resultCode == ::Helper::Error) |
328 | errs = sslCrtvdCheckForErrors(*validationResponse, errDetails); | |
329 | else if (validationResponse->resultCode != ::Helper::Okay) | |
a23223bf CT |
330 | validatorFailed = true; |
331 | ||
332 | if (!errDetails && !validatorFailed) { | |
1b091aec CT |
333 | noteNegotiationDone(NULL); |
334 | callBack(); | |
a23223bf CT |
335 | return; |
336 | } | |
337 | ||
1b091aec CT |
338 | if (errs) { |
339 | if (certErrors) | |
340 | cbdataReferenceDone(certErrors); | |
341 | certErrors = cbdataReference(errs); | |
342 | } | |
343 | ||
a23223bf CT |
344 | ErrorState *anErr = NULL; |
345 | if (validatorFailed) { | |
346 | anErr = new ErrorState(ERR_GATEWAY_FAILURE, Http::scInternalServerError, request.getRaw()); | |
347 | } else { | |
a23223bf CT |
348 | anErr = new ErrorState(ERR_SECURE_CONNECT_FAIL, Http::scServiceUnavailable, request.getRaw()); |
349 | anErr->detail = errDetails; | |
350 | /*anErr->xerrno= Should preserved*/ | |
351 | } | |
352 | ||
1b091aec | 353 | noteNegotiationDone(anErr); |
a23223bf | 354 | bail(anErr); |
a23223bf CT |
355 | serverConn->close(); |
356 | return; | |
357 | } | |
358 | ||
359 | /// Checks errors in the cert. validator response against sslproxy_cert_error. | |
360 | /// The first honored error, if any, is returned via errDetails parameter. | |
361 | /// The method returns all seen errors except SSL_ERROR_NONE as Ssl::CertErrors. | |
362 | Ssl::CertErrors * | |
363 | Ssl::PeerConnector::sslCrtvdCheckForErrors(Ssl::CertValidationResponse const &resp, Ssl::ErrorDetail *& errDetails) | |
364 | { | |
365 | Ssl::CertErrors *errs = NULL; | |
366 | ||
367 | ACLFilledChecklist *check = NULL; | |
368 | if (acl_access *acl = ::Config.ssl_client.cert_error) | |
369 | check = new ACLFilledChecklist(acl, request.getRaw(), dash_str); | |
370 | ||
371 | SSL *ssl = fd_table[serverConnection()->fd].ssl; | |
372 | typedef Ssl::CertValidationResponse::RecvdErrors::const_iterator SVCRECI; | |
373 | for (SVCRECI i = resp.errors.begin(); i != resp.errors.end(); ++i) { | |
374 | debugs(83, 7, "Error item: " << i->error_no << " " << i->error_reason); | |
375 | ||
376 | assert(i->error_no != SSL_ERROR_NONE); | |
377 | ||
378 | if (!errDetails) { | |
379 | bool allowed = false; | |
380 | if (check) { | |
b4e6a8d4 | 381 | check->sslErrors = new Ssl::CertErrors(Ssl::CertError(i->error_no, i->cert.get(), i->error_depth)); |
a23223bf CT |
382 | if (check->fastCheck() == ACCESS_ALLOWED) |
383 | allowed = true; | |
384 | } | |
385 | // else the Config.ssl_client.cert_error access list is not defined | |
386 | // and the first error will cause the error page | |
387 | ||
388 | if (allowed) { | |
389 | debugs(83, 3, "bypassing SSL error " << i->error_no << " in " << "buffer"); | |
390 | } else { | |
391 | debugs(83, 5, "confirming SSL error " << i->error_no); | |
392 | X509 *brokenCert = i->cert.get(); | |
f97700a0 | 393 | Security::CertPointer peerCert(SSL_get_peer_certificate(ssl)); |
a23223bf CT |
394 | const char *aReason = i->error_reason.empty() ? NULL : i->error_reason.c_str(); |
395 | errDetails = new Ssl::ErrorDetail(i->error_no, peerCert.get(), brokenCert, aReason); | |
396 | } | |
397 | if (check) { | |
398 | delete check->sslErrors; | |
399 | check->sslErrors = NULL; | |
400 | } | |
401 | } | |
402 | ||
403 | if (!errs) | |
b4e6a8d4 | 404 | errs = new Ssl::CertErrors(Ssl::CertError(i->error_no, i->cert.get(), i->error_depth)); |
a23223bf | 405 | else |
b4e6a8d4 | 406 | errs->push_back_unique(Ssl::CertError(i->error_no, i->cert.get(), i->error_depth)); |
a23223bf CT |
407 | } |
408 | if (check) | |
409 | delete check; | |
410 | ||
411 | return errs; | |
412 | } | |
413 | ||
414 | /// A wrapper for Comm::SetSelect() notifications. | |
415 | void | |
416 | Ssl::PeerConnector::NegotiateSsl(int, void *data) | |
417 | { | |
418 | PeerConnector *pc = static_cast<PeerConnector*>(data); | |
419 | // Use job calls to add done() checks and other job logic/protections. | |
420 | CallJobHere(83, 7, pc, Ssl::PeerConnector, negotiateSsl); | |
421 | } | |
422 | ||
423 | void | |
424 | Ssl::PeerConnector::handleNegotiateError(const int ret) | |
425 | { | |
426 | const int fd = serverConnection()->fd; | |
427 | unsigned long ssl_lib_error = SSL_ERROR_NONE; | |
428 | SSL *ssl = fd_table[fd].ssl; | |
f5518dca | 429 | const int ssl_error = SSL_get_error(ssl, ret); |
a23223bf | 430 | |
e2849af8 | 431 | switch (ssl_error) { |
e2849af8 | 432 | case SSL_ERROR_WANT_READ: |
1b091aec | 433 | noteWantRead(); |
e2849af8 | 434 | return; |
a23223bf | 435 | |
e2849af8 | 436 | case SSL_ERROR_WANT_WRITE: |
1b091aec | 437 | noteWantWrite(); |
e2849af8 | 438 | return; |
a23223bf | 439 | |
e2849af8 A |
440 | case SSL_ERROR_SSL: |
441 | case SSL_ERROR_SYSCALL: | |
442 | ssl_lib_error = ERR_get_error(); | |
1b091aec CT |
443 | // proceed to the general error handling code |
444 | break; | |
445 | default: | |
446 | // no special error handling for all other errors | |
447 | break; | |
448 | } | |
449 | noteSslNegotiationError(ret, ssl_error, ssl_lib_error); | |
450 | } | |
a23223bf | 451 | |
1b091aec CT |
452 | void |
453 | Ssl::PeerConnector::noteWantRead() | |
454 | { | |
455 | setReadTimeout(); | |
456 | const int fd = serverConnection()->fd; | |
457 | Comm::SetSelect(fd, COMM_SELECT_READ, &NegotiateSsl, this, 0); | |
458 | } | |
7f4e9b73 | 459 | |
1b091aec CT |
460 | void |
461 | Ssl::PeerConnector::noteWantWrite() | |
462 | { | |
463 | const int fd = serverConnection()->fd; | |
464 | Comm::SetSelect(fd, COMM_SELECT_WRITE, &NegotiateSsl, this, 0); | |
465 | return; | |
466 | } | |
a23223bf | 467 | |
1b091aec CT |
468 | void |
469 | Ssl::PeerConnector::noteSslNegotiationError(const int ret, const int ssl_error, const int ssl_lib_error) | |
470 | { | |
471 | #ifdef EPROTO | |
472 | int sysErrNo = EPROTO; | |
473 | #else | |
474 | int sysErrNo = EACCES; | |
475 | #endif | |
a23223bf | 476 | |
1b091aec CT |
477 | // store/report errno when ssl_error is SSL_ERROR_SYSCALL, ssl_lib_error is 0, and ret is -1 |
478 | if (ssl_error == SSL_ERROR_SYSCALL && ret == -1 && ssl_lib_error == 0) | |
479 | sysErrNo = errno; | |
a23223bf | 480 | |
1b091aec CT |
481 | const int fd = serverConnection()->fd; |
482 | debugs(83, DBG_IMPORTANT, "Error negotiating SSL on FD " << fd << | |
483 | ": " << ERR_error_string(ssl_lib_error, NULL) << " (" << | |
484 | ssl_error << "/" << ret << "/" << errno << ")"); | |
a23223bf | 485 | |
1b091aec CT |
486 | ErrorState *anErr = NULL; |
487 | if (request != NULL) | |
488 | anErr = ErrorState::NewForwarding(ERR_SECURE_CONNECT_FAIL, request.getRaw()); | |
489 | else | |
490 | anErr = new ErrorState(ERR_SECURE_CONNECT_FAIL, Http::scServiceUnavailable, NULL); | |
a23223bf CT |
491 | anErr->xerrno = sysErrNo; |
492 | ||
1b091aec | 493 | SSL *ssl = fd_table[fd].ssl; |
a23223bf CT |
494 | Ssl::ErrorDetail *errFromFailure = (Ssl::ErrorDetail *)SSL_get_ex_data(ssl, ssl_ex_index_ssl_error_detail); |
495 | if (errFromFailure != NULL) { | |
496 | // The errFromFailure is attached to the ssl object | |
497 | // and will be released when ssl object destroyed. | |
498 | // Copy errFromFailure to a new Ssl::ErrorDetail object | |
499 | anErr->detail = new Ssl::ErrorDetail(*errFromFailure); | |
500 | } else { | |
501 | // server_cert can be NULL here | |
502 | X509 *server_cert = SSL_get_peer_certificate(ssl); | |
503 | anErr->detail = new Ssl::ErrorDetail(SQUID_ERR_SSL_HANDSHAKE, server_cert, NULL); | |
504 | X509_free(server_cert); | |
505 | } | |
506 | ||
507 | if (ssl_lib_error != SSL_ERROR_NONE) | |
508 | anErr->detail->setLibError(ssl_lib_error); | |
509 | ||
1b091aec CT |
510 | assert(certErrors == NULL); |
511 | // remember validation errors, if any | |
512 | if (Ssl::CertErrors *errs = static_cast<Ssl::CertErrors*>(SSL_get_ex_data(ssl, ssl_ex_index_ssl_errors))) | |
513 | certErrors = cbdataReference(errs); | |
a23223bf | 514 | |
1b091aec | 515 | noteNegotiationDone(anErr); |
a23223bf CT |
516 | bail(anErr); |
517 | } | |
518 | ||
519 | void | |
520 | Ssl::PeerConnector::bail(ErrorState *error) | |
521 | { | |
522 | Must(error); // or the recepient will not know there was a problem | |
a23223bf CT |
523 | Must(callback != NULL); |
524 | CbDialer *dialer = dynamic_cast<CbDialer*>(callback->getDialer()); | |
525 | Must(dialer); | |
526 | dialer->answer().error = error; | |
527 | ||
528 | callBack(); | |
529 | // Our job is done. The callabck recepient will probably close the failed | |
530 | // peer connection and try another peer or go direct (if possible). We | |
531 | // can close the connection ourselves (our error notification would reach | |
532 | // the recepient before the fd-closure notification), but we would rather | |
533 | // minimize the number of fd-closure notifications and let the recepient | |
534 | // manage the TCP state of the connection. | |
535 | } | |
536 | ||
537 | void | |
538 | Ssl::PeerConnector::callBack() | |
539 | { | |
540 | AsyncCall::Pointer cb = callback; | |
541 | // Do this now so that if we throw below, swanSong() assert that we _tried_ | |
542 | // to call back holds. | |
543 | callback = NULL; // this should make done() true | |
544 | ||
545 | // remove close handler | |
546 | comm_remove_close_handler(serverConnection()->fd, closeHandler); | |
547 | ||
548 | CbDialer *dialer = dynamic_cast<CbDialer*>(cb->getDialer()); | |
549 | Must(dialer); | |
550 | dialer->answer().conn = serverConnection(); | |
551 | ScheduleCallHere(cb); | |
552 | } | |
553 | ||
a23223bf CT |
554 | void |
555 | Ssl::PeerConnector::swanSong() | |
556 | { | |
557 | // XXX: unregister fd-closure monitoring and CommSetSelect interest, if any | |
558 | AsyncJob::swanSong(); | |
566f8310 AR |
559 | if (callback != NULL) { // paranoid: we have left the caller waiting |
560 | debugs(83, DBG_IMPORTANT, "BUG: Unexpected state while connecting to a cache_peer or origin server"); | |
561 | ErrorState *anErr = new ErrorState(ERR_GATEWAY_FAILURE, Http::scInternalServerError, request.getRaw()); | |
562 | bail(anErr); | |
563 | assert(!callback); | |
564 | return; | |
565 | } | |
a23223bf CT |
566 | } |
567 | ||
568 | const char * | |
569 | Ssl::PeerConnector::status() const | |
570 | { | |
571 | static MemBuf buf; | |
572 | buf.reset(); | |
573 | ||
574 | // TODO: redesign AsyncJob::status() API to avoid this | |
575 | // id and stop reason reporting duplication. | |
576 | buf.append(" [", 2); | |
577 | if (stopReason != NULL) { | |
07e6d76e AJ |
578 | buf.append("Stopped, reason:", 16); |
579 | buf.appendf("%s",stopReason); | |
a23223bf CT |
580 | } |
581 | if (serverConn != NULL) | |
07e6d76e AJ |
582 | buf.appendf(" FD %d", serverConn->fd); |
583 | buf.appendf(" %s%u]", id.Prefix, id.value); | |
a23223bf CT |
584 | buf.terminate(); |
585 | ||
586 | return buf.content(); | |
587 | } | |
588 | ||
96993ee0 | 589 | Security::ContextPtr |
1b091aec CT |
590 | Ssl::BlindPeerConnector::getSslContext() |
591 | { | |
592 | if (const CachePeer *peer = serverConnection()->getPeer()) { | |
593 | assert(peer->secure.encryptTransport); | |
96993ee0 | 594 | Security::ContextPtr sslContext(peer->sslContext); |
1b091aec CT |
595 | return sslContext; |
596 | } | |
41e803be | 597 | return ::Config.ssl_client.sslContext; |
1b091aec CT |
598 | } |
599 | ||
600 | SSL * | |
601 | Ssl::BlindPeerConnector::initializeSsl() | |
602 | { | |
603 | SSL *ssl = Ssl::PeerConnector::initializeSsl(); | |
604 | if (!ssl) | |
605 | return NULL; | |
606 | ||
41e803be CT |
607 | if (const CachePeer *peer = serverConnection()->getPeer()) { |
608 | assert(peer); | |
1b091aec | 609 | |
41e803be CT |
610 | // NP: domain may be a raw-IP but it is now always set |
611 | assert(!peer->secure.sslDomain.isEmpty()); | |
1b091aec | 612 | |
41e803be CT |
613 | // const loss is okay here, ssl_ex_index_server is only read and not assigned a destructor |
614 | SBuf *host = new SBuf(peer->secure.sslDomain); | |
615 | SSL_set_ex_data(ssl, ssl_ex_index_server, host); | |
1b091aec | 616 | |
41e803be CT |
617 | if (peer->sslSession) |
618 | SSL_set_session(ssl, peer->sslSession); | |
619 | } else { | |
620 | SBuf *hostName = new SBuf(request->url.host()); | |
621 | SSL_set_ex_data(ssl, ssl_ex_index_server, (void*)hostName); | |
622 | } | |
1b091aec CT |
623 | |
624 | return ssl; | |
625 | } | |
626 | ||
627 | void | |
628 | Ssl::BlindPeerConnector::noteNegotiationDone(ErrorState *error) | |
629 | { | |
630 | if (error) { | |
631 | // XXX: forward.cc calls peerConnectSucceeded() after an OK TCP connect but | |
632 | // we call peerConnectFailed() if SSL failed afterwards. Is that OK? | |
633 | // It is not clear whether we should call peerConnectSucceeded/Failed() | |
634 | // based on TCP results, SSL results, or both. And the code is probably not | |
635 | // consistent in this aspect across tunnelling and forwarding modules. | |
636 | if (CachePeer *p = serverConnection()->getPeer()) | |
637 | peerConnectFailed(p); | |
638 | return; | |
639 | } | |
640 | ||
641 | const int fd = serverConnection()->fd; | |
642 | SSL *ssl = fd_table[fd].ssl; | |
643 | if (serverConnection()->getPeer() && !SSL_session_reused(ssl)) { | |
644 | if (serverConnection()->getPeer()->sslSession) | |
645 | SSL_SESSION_free(serverConnection()->getPeer()->sslSession); | |
646 | ||
647 | serverConnection()->getPeer()->sslSession = SSL_get1_session(ssl); | |
648 | } | |
649 | } | |
650 | ||
96993ee0 | 651 | Security::ContextPtr |
1b091aec CT |
652 | Ssl::PeekingPeerConnector::getSslContext() |
653 | { | |
654 | // XXX: locate a per-server context in Security:: instead | |
655 | return ::Config.ssl_client.sslContext; | |
656 | } | |
657 | ||
658 | SSL * | |
659 | Ssl::PeekingPeerConnector::initializeSsl() | |
660 | { | |
661 | SSL *ssl = Ssl::PeerConnector::initializeSsl(); | |
662 | if (!ssl) | |
663 | return NULL; | |
664 | ||
665 | if (ConnStateData *csd = request->clientConnectionManager.valid()) { | |
666 | ||
667 | // client connection is required in the case we need to splice | |
668 | // or terminate client and server connections | |
669 | assert(clientConn != NULL); | |
670 | SBuf *hostName = NULL; | |
671 | Ssl::ClientBio *cltBio = NULL; | |
672 | ||
673 | //Enable Status_request tls extension, required to bump some clients | |
674 | SSL_set_tlsext_status_type(ssl, TLSEXT_STATUSTYPE_ocsp); | |
675 | ||
676 | // In server-first bumping mode, clientSsl is NULL. | |
677 | if (SSL *clientSsl = fd_table[clientConn->fd].ssl) { | |
678 | BIO *b = SSL_get_rbio(clientSsl); | |
679 | cltBio = static_cast<Ssl::ClientBio *>(b->ptr); | |
2bcab852 | 680 | const Ssl::Bio::sslFeatures &features = cltBio->receivedHelloFeatures(); |
1b091aec CT |
681 | if (!features.serverName.isEmpty()) |
682 | hostName = new SBuf(features.serverName); | |
683 | } | |
684 | ||
685 | if (!hostName) { | |
686 | // While we are peeking at the certificate, we may not know the server | |
687 | // name that the client will request (after interception or CONNECT) | |
688 | // unless it was the CONNECT request with a user-typed address. | |
689 | const bool isConnectRequest = !csd->port->flags.isIntercepted(); | |
690 | if (!request->flags.sslPeek || isConnectRequest) | |
5c51bffb | 691 | hostName = new SBuf(request->url.host()); |
1b091aec CT |
692 | } |
693 | ||
694 | if (hostName) | |
695 | SSL_set_ex_data(ssl, ssl_ex_index_server, (void*)hostName); | |
696 | ||
697 | Must(!csd->serverBump() || csd->serverBump()->step <= Ssl::bumpStep2); | |
698 | if (csd->sslBumpMode == Ssl::bumpPeek || csd->sslBumpMode == Ssl::bumpStare) { | |
699 | assert(cltBio); | |
2bcab852 | 700 | const Ssl::Bio::sslFeatures &features = cltBio->receivedHelloFeatures(); |
1b091aec CT |
701 | if (features.sslVersion != -1) { |
702 | features.applyToSSL(ssl, csd->sslBumpMode); | |
703 | // Should we allow it for all protocols? | |
704 | if (features.sslVersion >= 3) { | |
705 | BIO *b = SSL_get_rbio(ssl); | |
706 | Ssl::ServerBio *srvBio = static_cast<Ssl::ServerBio *>(b->ptr); | |
707 | // Inherite client features, like SSL version, SNI and other | |
708 | srvBio->setClientFeatures(features); | |
709 | srvBio->recordInput(true); | |
710 | srvBio->mode(csd->sslBumpMode); | |
711 | } | |
712 | } | |
713 | } else { | |
714 | // Set client SSL options | |
715 | SSL_set_options(ssl, ::Security::ProxyOutgoingConfig.parsedOptions); | |
716 | ||
717 | // Use SNI TLS extension only when we connect directly | |
718 | // to the origin server and we know the server host name. | |
c52a4693 AW |
719 | const char *sniServer = NULL; |
720 | const bool redirected = request->flags.redirected && ::Config.onoff.redir_rewrites_host; | |
721 | if (!hostName || redirected) | |
722 | sniServer = !request->url.hostIsNumeric() ? request->url.host() : NULL; | |
723 | else | |
724 | sniServer = hostName->c_str(); | |
725 | ||
1b091aec CT |
726 | if (sniServer) |
727 | Ssl::setClientSNI(ssl, sniServer); | |
728 | } | |
729 | ||
730 | // store peeked cert to check SQUID_X509_V_ERR_CERT_CHANGE | |
731 | X509 *peeked_cert; | |
732 | if (csd->serverBump() && | |
733 | (peeked_cert = csd->serverBump()->serverCert.get())) { | |
734 | CRYPTO_add(&(peeked_cert->references),1,CRYPTO_LOCK_X509); | |
735 | SSL_set_ex_data(ssl, ssl_ex_index_ssl_peeked_cert, peeked_cert); | |
736 | } | |
737 | } | |
738 | ||
739 | return ssl; | |
740 | } | |
741 | ||
742 | void | |
743 | Ssl::PeekingPeerConnector::noteNegotiationDone(ErrorState *error) | |
744 | { | |
745 | SSL *ssl = fd_table[serverConnection()->fd].ssl; | |
746 | ||
747 | // Check the list error with | |
748 | if (!request->clientConnectionManager.valid() || ! ssl) | |
749 | return; | |
750 | ||
751 | // remember the server certificate from the ErrorDetail object | |
752 | if (Ssl::ServerBump *serverBump = request->clientConnectionManager->serverBump()) { | |
753 | // remember validation errors, if any | |
754 | if (certErrors) { | |
755 | if (serverBump->sslErrors) | |
756 | cbdataReferenceDone(serverBump->sslErrors); | |
757 | serverBump->sslErrors = cbdataReference(certErrors); | |
758 | } | |
759 | ||
760 | if (!serverBump->serverCert.get()) { | |
761 | // remember the server certificate from the ErrorDetail object | |
762 | if (error && error->detail && error->detail->peerCert()) | |
763 | serverBump->serverCert.resetAndLock(error->detail->peerCert()); | |
764 | else { | |
765 | handleServerCertificate(); | |
766 | } | |
767 | } | |
768 | ||
769 | if (error) { | |
770 | // For intercepted connections, set the host name to the server | |
771 | // certificate CN. Otherwise, we just hope that CONNECT is using | |
772 | // a user-entered address (a host name or a user-entered IP). | |
773 | const bool isConnectRequest = !request->clientConnectionManager->port->flags.isIntercepted(); | |
774 | if (request->flags.sslPeek && !isConnectRequest) { | |
775 | if (X509 *srvX509 = serverBump->serverCert.get()) { | |
776 | if (const char *name = Ssl::CommonHostName(srvX509)) { | |
851feda6 | 777 | request->url.host(name); |
1b091aec CT |
778 | debugs(83, 3, "reset request host: " << name); |
779 | } | |
780 | } | |
781 | } | |
782 | } | |
783 | } | |
784 | ||
2bcab852 CT |
785 | // retrieve TLS server information if any |
786 | serverConnection()->tlsNegotiations()->fillWith(ssl); | |
ce74a2eb CT |
787 | if (!error) { |
788 | serverCertificateVerified(); | |
2bcab852 CT |
789 | if (splice) { |
790 | //retrieved received TLS client informations | |
791 | SSL *clientSsl = fd_table[clientConn->fd].ssl; | |
792 | clientConn->tlsNegotiations()->fillWith(clientSsl); | |
ce74a2eb | 793 | switchToTunnel(request.getRaw(), clientConn, serverConn); |
2bcab852 | 794 | } |
ce74a2eb | 795 | } |
1b091aec CT |
796 | } |
797 | ||
798 | void | |
799 | Ssl::PeekingPeerConnector::noteWantWrite() | |
800 | { | |
801 | const int fd = serverConnection()->fd; | |
802 | SSL *ssl = fd_table[fd].ssl; | |
803 | BIO *b = SSL_get_rbio(ssl); | |
804 | Ssl::ServerBio *srvBio = static_cast<Ssl::ServerBio *>(b->ptr); | |
805 | ||
806 | if ((srvBio->bumpMode() == Ssl::bumpPeek || srvBio->bumpMode() == Ssl::bumpStare) && srvBio->holdWrite()) { | |
807 | debugs(81, DBG_IMPORTANT, "hold write on SSL connection on FD " << fd); | |
808 | checkForPeekAndSplice(); | |
809 | return; | |
810 | } | |
811 | ||
812 | Ssl::PeerConnector::noteWantWrite(); | |
813 | } | |
814 | ||
815 | void | |
816 | Ssl::PeekingPeerConnector::noteSslNegotiationError(const int result, const int ssl_error, const int ssl_lib_error) | |
817 | { | |
818 | const int fd = serverConnection()->fd; | |
819 | SSL *ssl = fd_table[fd].ssl; | |
820 | BIO *b = SSL_get_rbio(ssl); | |
821 | Ssl::ServerBio *srvBio = static_cast<Ssl::ServerBio *>(b->ptr); | |
822 | ||
823 | // In Peek mode, the ClientHello message sent to the server. If the | |
824 | // server resuming a previous (spliced) SSL session with the client, | |
825 | // then probably we are here because local SSL object does not know | |
826 | // anything about the session being resumed. | |
827 | // | |
828 | if (srvBio->bumpMode() == Ssl::bumpPeek && (resumingSession = srvBio->resumingSession())) { | |
829 | // we currently splice all resumed sessions unconditionally | |
830 | if (const bool spliceResumed = true) { | |
831 | bypassCertValidator(); | |
566f8310 | 832 | checkForPeekAndSpliceMatched(Ssl::bumpSplice); |
1b091aec CT |
833 | return; |
834 | } // else fall through to find a matching ssl_bump action (with limited info) | |
835 | } | |
836 | ||
837 | // If we are in peek-and-splice mode and still we did not write to | |
838 | // server yet, try to see if we should splice. | |
839 | // In this case the connection can be saved. | |
840 | // If the checklist decision is do not splice a new error will | |
841 | // occur in the next SSL_connect call, and we will fail again. | |
842 | // Abort on certificate validation errors to avoid splicing and | |
843 | // thus hiding them. | |
844 | // Abort if no certificate found probably because of malformed or | |
845 | // unsupported server Hello message (TODO: make configurable). | |
846 | if (!SSL_get_ex_data(ssl, ssl_ex_index_ssl_error_detail) && | |
847 | (srvBio->bumpMode() == Ssl::bumpPeek || srvBio->bumpMode() == Ssl::bumpStare) && srvBio->holdWrite()) { | |
f97700a0 | 848 | Security::CertPointer serverCert(SSL_get_peer_certificate(ssl)); |
1b091aec CT |
849 | if (serverCert.get()) { |
850 | debugs(81, 3, "Error (" << ERR_error_string(ssl_lib_error, NULL) << ") but, hold write on SSL connection on FD " << fd); | |
851 | checkForPeekAndSplice(); | |
852 | return; | |
853 | } | |
854 | } | |
855 | ||
856 | // else call parent noteNegotiationError to produce an error page | |
857 | Ssl::PeerConnector::noteSslNegotiationError(result, ssl_error, ssl_lib_error); | |
858 | } | |
859 | ||
860 | void | |
861 | Ssl::PeekingPeerConnector::handleServerCertificate() | |
862 | { | |
863 | if (serverCertificateHandled) | |
864 | return; | |
865 | ||
866 | if (ConnStateData *csd = request->clientConnectionManager.valid()) { | |
867 | const int fd = serverConnection()->fd; | |
868 | SSL *ssl = fd_table[fd].ssl; | |
f97700a0 | 869 | Security::CertPointer serverCert(SSL_get_peer_certificate(ssl)); |
1b091aec CT |
870 | if (!serverCert.get()) |
871 | return; | |
872 | ||
873 | serverCertificateHandled = true; | |
874 | ||
1b091aec CT |
875 | // remember the server certificate for later use |
876 | if (Ssl::ServerBump *serverBump = csd->serverBump()) { | |
877 | serverBump->serverCert.reset(serverCert.release()); | |
878 | } | |
879 | } | |
880 | } | |
7fe542fe | 881 | |
ce74a2eb CT |
882 | void |
883 | Ssl::PeekingPeerConnector::serverCertificateVerified() | |
884 | { | |
885 | if (ConnStateData *csd = request->clientConnectionManager.valid()) { | |
f97700a0 | 886 | Security::CertPointer serverCert; |
ce74a2eb CT |
887 | if(Ssl::ServerBump *serverBump = csd->serverBump()) |
888 | serverCert.resetAndLock(serverBump->serverCert.get()); | |
889 | else { | |
890 | const int fd = serverConnection()->fd; | |
891 | SSL *ssl = fd_table[fd].ssl; | |
892 | serverCert.reset(SSL_get_peer_certificate(ssl)); | |
893 | } | |
894 | if (serverCert.get()) { | |
895 | csd->resetSslCommonName(Ssl::CommonHostName(serverCert.get())); | |
896 | debugs(83, 5, "HTTPS server CN: " << csd->sslCommonName() << | |
897 | " bumped: " << *serverConnection()); | |
898 | } | |
899 | } | |
900 | } | |
901 |