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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "net/socket/ssl_server_socket_openssl.h" | |
| 6 | |
| 7 #include <openssl/err.h> | |
| 8 #include <openssl/ssl.h> | |
| 9 #include <utility> | |
| 10 | |
| 11 #include "base/callback_helpers.h" | |
| 12 #include "base/logging.h" | |
| 13 #include "base/strings/string_util.h" | |
| 14 #include "crypto/openssl_util.h" | |
| 15 #include "crypto/rsa_private_key.h" | |
| 16 #include "crypto/scoped_openssl_types.h" | |
| 17 #include "net/base/net_errors.h" | |
| 18 #include "net/cert/cert_verify_result.h" | |
| 19 #include "net/cert/client_cert_verifier.h" | |
| 20 #include "net/cert/x509_util_openssl.h" | |
| 21 #include "net/ssl/openssl_ssl_util.h" | |
| 22 #include "net/ssl/ssl_connection_status_flags.h" | |
| 23 #include "net/ssl/ssl_info.h" | |
| 24 | |
| 25 #define GotoState(s) next_handshake_state_ = s | |
| 26 | |
| 27 namespace net { | |
| 28 | |
| 29 namespace { | |
| 30 | |
| 31 // Creates an X509Certificate out of the concatenation of |cert|, if non-null, | |
| 32 // with |chain|. | |
| 33 scoped_refptr<X509Certificate> CreateX509Certificate(X509* cert, | |
| 34 STACK_OF(X509) * chain) { | |
| 35 std::vector<base::StringPiece> der_chain; | |
| 36 base::StringPiece der_cert; | |
| 37 scoped_refptr<X509Certificate> client_cert; | |
| 38 if (cert) { | |
| 39 if (!x509_util::GetDER(cert, &der_cert)) | |
| 40 return nullptr; | |
| 41 der_chain.push_back(der_cert); | |
| 42 } | |
| 43 | |
| 44 for (size_t i = 0; i < sk_X509_num(chain); ++i) { | |
| 45 X509* x = sk_X509_value(chain, i); | |
| 46 if (!x509_util::GetDER(x, &der_cert)) | |
| 47 return nullptr; | |
| 48 der_chain.push_back(der_cert); | |
| 49 } | |
| 50 | |
| 51 return X509Certificate::CreateFromDERCertChain(der_chain); | |
| 52 } | |
| 53 | |
| 54 class SSLServerSocketOpenSSL : public SSLServerSocket { | |
| 55 public: | |
| 56 // See comments on CreateSSLServerSocket for details of how these | |
| 57 // parameters are used. | |
| 58 SSLServerSocketOpenSSL(std::unique_ptr<StreamSocket> socket, SSL* ssl); | |
| 59 ~SSLServerSocketOpenSSL() override; | |
| 60 | |
| 61 // SSLServerSocket interface. | |
| 62 int Handshake(const CompletionCallback& callback) override; | |
| 63 | |
| 64 // SSLSocket interface. | |
| 65 int ExportKeyingMaterial(const base::StringPiece& label, | |
| 66 bool has_context, | |
| 67 const base::StringPiece& context, | |
| 68 unsigned char* out, | |
| 69 unsigned int outlen) override; | |
| 70 | |
| 71 // Socket interface (via StreamSocket). | |
| 72 int Read(IOBuffer* buf, | |
| 73 int buf_len, | |
| 74 const CompletionCallback& callback) override; | |
| 75 int Write(IOBuffer* buf, | |
| 76 int buf_len, | |
| 77 const CompletionCallback& callback) override; | |
| 78 int SetReceiveBufferSize(int32_t size) override; | |
| 79 int SetSendBufferSize(int32_t size) override; | |
| 80 | |
| 81 // StreamSocket implementation. | |
| 82 int Connect(const CompletionCallback& callback) override; | |
| 83 void Disconnect() override; | |
| 84 bool IsConnected() const override; | |
| 85 bool IsConnectedAndIdle() const override; | |
| 86 int GetPeerAddress(IPEndPoint* address) const override; | |
| 87 int GetLocalAddress(IPEndPoint* address) const override; | |
| 88 const BoundNetLog& NetLog() const override; | |
| 89 void SetSubresourceSpeculation() override; | |
| 90 void SetOmniboxSpeculation() override; | |
| 91 bool WasEverUsed() const override; | |
| 92 bool WasNpnNegotiated() const override; | |
| 93 NextProto GetNegotiatedProtocol() const override; | |
| 94 bool GetSSLInfo(SSLInfo* ssl_info) override; | |
| 95 void GetConnectionAttempts(ConnectionAttempts* out) const override; | |
| 96 void ClearConnectionAttempts() override {} | |
| 97 void AddConnectionAttempts(const ConnectionAttempts& attempts) override {} | |
| 98 int64_t GetTotalReceivedBytes() const override; | |
| 99 static int CertVerifyCallback(X509_STORE_CTX* store_ctx, void* arg); | |
| 100 | |
| 101 private: | |
| 102 enum State { | |
| 103 STATE_NONE, | |
| 104 STATE_HANDSHAKE, | |
| 105 }; | |
| 106 | |
| 107 void OnSendComplete(int result); | |
| 108 void OnRecvComplete(int result); | |
| 109 void OnHandshakeIOComplete(int result); | |
| 110 | |
| 111 int BufferSend(); | |
| 112 void BufferSendComplete(int result); | |
| 113 void TransportWriteComplete(int result); | |
| 114 int BufferRecv(); | |
| 115 void BufferRecvComplete(int result); | |
| 116 int TransportReadComplete(int result); | |
| 117 bool DoTransportIO(); | |
| 118 int DoPayloadRead(); | |
| 119 int DoPayloadWrite(); | |
| 120 | |
| 121 int DoHandshakeLoop(int last_io_result); | |
| 122 int DoReadLoop(int result); | |
| 123 int DoWriteLoop(int result); | |
| 124 int DoHandshake(); | |
| 125 void DoHandshakeCallback(int result); | |
| 126 void DoReadCallback(int result); | |
| 127 void DoWriteCallback(int result); | |
| 128 | |
| 129 int Init(); | |
| 130 void ExtractClientCert(); | |
| 131 | |
| 132 // Members used to send and receive buffer. | |
| 133 bool transport_send_busy_; | |
| 134 bool transport_recv_busy_; | |
| 135 bool transport_recv_eof_; | |
| 136 | |
| 137 scoped_refptr<DrainableIOBuffer> send_buffer_; | |
| 138 scoped_refptr<IOBuffer> recv_buffer_; | |
| 139 | |
| 140 BoundNetLog net_log_; | |
| 141 | |
| 142 CompletionCallback user_handshake_callback_; | |
| 143 CompletionCallback user_read_callback_; | |
| 144 CompletionCallback user_write_callback_; | |
| 145 | |
| 146 // Used by Read function. | |
| 147 scoped_refptr<IOBuffer> user_read_buf_; | |
| 148 int user_read_buf_len_; | |
| 149 | |
| 150 // Used by Write function. | |
| 151 scoped_refptr<IOBuffer> user_write_buf_; | |
| 152 int user_write_buf_len_; | |
| 153 | |
| 154 // Used by TransportWriteComplete() and TransportReadComplete() to signify an | |
| 155 // error writing to the transport socket. A value of OK indicates no error. | |
| 156 int transport_write_error_; | |
| 157 | |
| 158 // OpenSSL stuff | |
| 159 SSL* ssl_; | |
| 160 BIO* transport_bio_; | |
| 161 | |
| 162 // StreamSocket for sending and receiving data. | |
| 163 std::unique_ptr<StreamSocket> transport_socket_; | |
| 164 | |
| 165 // Certificate for the client. | |
| 166 scoped_refptr<X509Certificate> client_cert_; | |
| 167 | |
| 168 State next_handshake_state_; | |
| 169 bool completed_handshake_; | |
| 170 | |
| 171 DISALLOW_COPY_AND_ASSIGN(SSLServerSocketOpenSSL); | |
| 172 }; | |
| 173 | |
| 174 SSLServerSocketOpenSSL::SSLServerSocketOpenSSL( | |
| 175 std::unique_ptr<StreamSocket> transport_socket, | |
| 176 SSL* ssl) | |
| 177 : transport_send_busy_(false), | |
| 178 transport_recv_busy_(false), | |
| 179 transport_recv_eof_(false), | |
| 180 user_read_buf_len_(0), | |
| 181 user_write_buf_len_(0), | |
| 182 transport_write_error_(OK), | |
| 183 ssl_(ssl), | |
| 184 transport_bio_(NULL), | |
| 185 transport_socket_(std::move(transport_socket)), | |
| 186 next_handshake_state_(STATE_NONE), | |
| 187 completed_handshake_(false) {} | |
| 188 | |
| 189 SSLServerSocketOpenSSL::~SSLServerSocketOpenSSL() { | |
| 190 if (ssl_) { | |
| 191 // Calling SSL_shutdown prevents the session from being marked as | |
| 192 // unresumable. | |
| 193 SSL_shutdown(ssl_); | |
| 194 SSL_free(ssl_); | |
| 195 ssl_ = NULL; | |
| 196 } | |
| 197 if (transport_bio_) { | |
| 198 BIO_free_all(transport_bio_); | |
| 199 transport_bio_ = NULL; | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 int SSLServerSocketOpenSSL::Handshake(const CompletionCallback& callback) { | |
| 204 net_log_.BeginEvent(NetLog::TYPE_SSL_SERVER_HANDSHAKE); | |
| 205 | |
| 206 // Set up new ssl object. | |
| 207 int rv = Init(); | |
| 208 if (rv != OK) { | |
| 209 LOG(ERROR) << "Failed to initialize OpenSSL: rv=" << rv; | |
| 210 net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_SERVER_HANDSHAKE, rv); | |
| 211 return rv; | |
| 212 } | |
| 213 | |
| 214 // Set SSL to server mode. Handshake happens in the loop below. | |
| 215 SSL_set_accept_state(ssl_); | |
| 216 | |
| 217 GotoState(STATE_HANDSHAKE); | |
| 218 rv = DoHandshakeLoop(OK); | |
| 219 if (rv == ERR_IO_PENDING) { | |
| 220 user_handshake_callback_ = callback; | |
| 221 } else { | |
| 222 net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_SERVER_HANDSHAKE, rv); | |
| 223 } | |
| 224 | |
| 225 return rv > OK ? OK : rv; | |
| 226 } | |
| 227 | |
| 228 int SSLServerSocketOpenSSL::ExportKeyingMaterial( | |
| 229 const base::StringPiece& label, | |
| 230 bool has_context, | |
| 231 const base::StringPiece& context, | |
| 232 unsigned char* out, | |
| 233 unsigned int outlen) { | |
| 234 if (!IsConnected()) | |
| 235 return ERR_SOCKET_NOT_CONNECTED; | |
| 236 | |
| 237 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 238 | |
| 239 int rv = SSL_export_keying_material( | |
| 240 ssl_, out, outlen, label.data(), label.size(), | |
| 241 reinterpret_cast<const unsigned char*>(context.data()), | |
| 242 context.length(), context.length() > 0); | |
| 243 | |
| 244 if (rv != 1) { | |
| 245 int ssl_error = SSL_get_error(ssl_, rv); | |
| 246 LOG(ERROR) << "Failed to export keying material;" | |
| 247 << " returned " << rv | |
| 248 << ", SSL error code " << ssl_error; | |
| 249 return MapOpenSSLError(ssl_error, err_tracer); | |
| 250 } | |
| 251 return OK; | |
| 252 } | |
| 253 | |
| 254 int SSLServerSocketOpenSSL::Read(IOBuffer* buf, | |
| 255 int buf_len, | |
| 256 const CompletionCallback& callback) { | |
| 257 DCHECK(user_read_callback_.is_null()); | |
| 258 DCHECK(user_handshake_callback_.is_null()); | |
| 259 DCHECK(!user_read_buf_); | |
| 260 DCHECK(!callback.is_null()); | |
| 261 | |
| 262 user_read_buf_ = buf; | |
| 263 user_read_buf_len_ = buf_len; | |
| 264 | |
| 265 DCHECK(completed_handshake_); | |
| 266 | |
| 267 int rv = DoReadLoop(OK); | |
| 268 | |
| 269 if (rv == ERR_IO_PENDING) { | |
| 270 user_read_callback_ = callback; | |
| 271 } else { | |
| 272 user_read_buf_ = NULL; | |
| 273 user_read_buf_len_ = 0; | |
| 274 } | |
| 275 | |
| 276 return rv; | |
| 277 } | |
| 278 | |
| 279 int SSLServerSocketOpenSSL::Write(IOBuffer* buf, | |
| 280 int buf_len, | |
| 281 const CompletionCallback& callback) { | |
| 282 DCHECK(user_write_callback_.is_null()); | |
| 283 DCHECK(!user_write_buf_); | |
| 284 DCHECK(!callback.is_null()); | |
| 285 | |
| 286 user_write_buf_ = buf; | |
| 287 user_write_buf_len_ = buf_len; | |
| 288 | |
| 289 int rv = DoWriteLoop(OK); | |
| 290 | |
| 291 if (rv == ERR_IO_PENDING) { | |
| 292 user_write_callback_ = callback; | |
| 293 } else { | |
| 294 user_write_buf_ = NULL; | |
| 295 user_write_buf_len_ = 0; | |
| 296 } | |
| 297 return rv; | |
| 298 } | |
| 299 | |
| 300 int SSLServerSocketOpenSSL::SetReceiveBufferSize(int32_t size) { | |
| 301 return transport_socket_->SetReceiveBufferSize(size); | |
| 302 } | |
| 303 | |
| 304 int SSLServerSocketOpenSSL::SetSendBufferSize(int32_t size) { | |
| 305 return transport_socket_->SetSendBufferSize(size); | |
| 306 } | |
| 307 | |
| 308 int SSLServerSocketOpenSSL::Connect(const CompletionCallback& callback) { | |
| 309 NOTIMPLEMENTED(); | |
| 310 return ERR_NOT_IMPLEMENTED; | |
| 311 } | |
| 312 | |
| 313 void SSLServerSocketOpenSSL::Disconnect() { | |
| 314 transport_socket_->Disconnect(); | |
| 315 } | |
| 316 | |
| 317 bool SSLServerSocketOpenSSL::IsConnected() const { | |
| 318 // TODO(wtc): Find out if we should check transport_socket_->IsConnected() | |
| 319 // as well. | |
| 320 return completed_handshake_; | |
| 321 } | |
| 322 | |
| 323 bool SSLServerSocketOpenSSL::IsConnectedAndIdle() const { | |
| 324 return completed_handshake_ && transport_socket_->IsConnectedAndIdle(); | |
| 325 } | |
| 326 | |
| 327 int SSLServerSocketOpenSSL::GetPeerAddress(IPEndPoint* address) const { | |
| 328 if (!IsConnected()) | |
| 329 return ERR_SOCKET_NOT_CONNECTED; | |
| 330 return transport_socket_->GetPeerAddress(address); | |
| 331 } | |
| 332 | |
| 333 int SSLServerSocketOpenSSL::GetLocalAddress(IPEndPoint* address) const { | |
| 334 if (!IsConnected()) | |
| 335 return ERR_SOCKET_NOT_CONNECTED; | |
| 336 return transport_socket_->GetLocalAddress(address); | |
| 337 } | |
| 338 | |
| 339 const BoundNetLog& SSLServerSocketOpenSSL::NetLog() const { | |
| 340 return net_log_; | |
| 341 } | |
| 342 | |
| 343 void SSLServerSocketOpenSSL::SetSubresourceSpeculation() { | |
| 344 transport_socket_->SetSubresourceSpeculation(); | |
| 345 } | |
| 346 | |
| 347 void SSLServerSocketOpenSSL::SetOmniboxSpeculation() { | |
| 348 transport_socket_->SetOmniboxSpeculation(); | |
| 349 } | |
| 350 | |
| 351 bool SSLServerSocketOpenSSL::WasEverUsed() const { | |
| 352 return transport_socket_->WasEverUsed(); | |
| 353 } | |
| 354 | |
| 355 bool SSLServerSocketOpenSSL::WasNpnNegotiated() const { | |
| 356 NOTIMPLEMENTED(); | |
| 357 return false; | |
| 358 } | |
| 359 | |
| 360 NextProto SSLServerSocketOpenSSL::GetNegotiatedProtocol() const { | |
| 361 // NPN is not supported by this class. | |
| 362 return kProtoUnknown; | |
| 363 } | |
| 364 | |
| 365 bool SSLServerSocketOpenSSL::GetSSLInfo(SSLInfo* ssl_info) { | |
| 366 ssl_info->Reset(); | |
| 367 if (!completed_handshake_) | |
| 368 return false; | |
| 369 | |
| 370 ssl_info->cert = client_cert_; | |
| 371 | |
| 372 const SSL_CIPHER* cipher = SSL_get_current_cipher(ssl_); | |
| 373 CHECK(cipher); | |
| 374 ssl_info->security_bits = SSL_CIPHER_get_bits(cipher, NULL); | |
| 375 | |
| 376 SSLConnectionStatusSetCipherSuite( | |
| 377 static_cast<uint16_t>(SSL_CIPHER_get_id(cipher)), | |
| 378 &ssl_info->connection_status); | |
| 379 SSLConnectionStatusSetVersion(GetNetSSLVersion(ssl_), | |
| 380 &ssl_info->connection_status); | |
| 381 | |
| 382 if (!SSL_get_secure_renegotiation_support(ssl_)) | |
| 383 ssl_info->connection_status |= SSL_CONNECTION_NO_RENEGOTIATION_EXTENSION; | |
| 384 | |
| 385 ssl_info->handshake_type = SSL_session_reused(ssl_) | |
| 386 ? SSLInfo::HANDSHAKE_RESUME | |
| 387 : SSLInfo::HANDSHAKE_FULL; | |
| 388 | |
| 389 return true; | |
| 390 } | |
| 391 | |
| 392 void SSLServerSocketOpenSSL::GetConnectionAttempts( | |
| 393 ConnectionAttempts* out) const { | |
| 394 out->clear(); | |
| 395 } | |
| 396 | |
| 397 int64_t SSLServerSocketOpenSSL::GetTotalReceivedBytes() const { | |
| 398 return transport_socket_->GetTotalReceivedBytes(); | |
| 399 } | |
| 400 | |
| 401 void SSLServerSocketOpenSSL::OnSendComplete(int result) { | |
| 402 if (next_handshake_state_ == STATE_HANDSHAKE) { | |
| 403 // In handshake phase. | |
| 404 OnHandshakeIOComplete(result); | |
| 405 return; | |
| 406 } | |
| 407 | |
| 408 // TODO(byungchul): This state machine is not correct. Copy the state machine | |
| 409 // of SSLClientSocketOpenSSL::OnSendComplete() which handles it better. | |
| 410 if (!completed_handshake_) | |
| 411 return; | |
| 412 | |
| 413 if (user_write_buf_) { | |
| 414 int rv = DoWriteLoop(result); | |
| 415 if (rv != ERR_IO_PENDING) | |
| 416 DoWriteCallback(rv); | |
| 417 } else { | |
| 418 // Ensure that any queued ciphertext is flushed. | |
| 419 DoTransportIO(); | |
| 420 } | |
| 421 } | |
| 422 | |
| 423 void SSLServerSocketOpenSSL::OnRecvComplete(int result) { | |
| 424 if (next_handshake_state_ == STATE_HANDSHAKE) { | |
| 425 // In handshake phase. | |
| 426 OnHandshakeIOComplete(result); | |
| 427 return; | |
| 428 } | |
| 429 | |
| 430 // Network layer received some data, check if client requested to read | |
| 431 // decrypted data. | |
| 432 if (!user_read_buf_ || !completed_handshake_) | |
| 433 return; | |
| 434 | |
| 435 int rv = DoReadLoop(result); | |
| 436 if (rv != ERR_IO_PENDING) | |
| 437 DoReadCallback(rv); | |
| 438 } | |
| 439 | |
| 440 void SSLServerSocketOpenSSL::OnHandshakeIOComplete(int result) { | |
| 441 int rv = DoHandshakeLoop(result); | |
| 442 if (rv == ERR_IO_PENDING) | |
| 443 return; | |
| 444 | |
| 445 net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_SERVER_HANDSHAKE, rv); | |
| 446 if (!user_handshake_callback_.is_null()) | |
| 447 DoHandshakeCallback(rv); | |
| 448 } | |
| 449 | |
| 450 // Return 0 for EOF, | |
| 451 // > 0 for bytes transferred immediately, | |
| 452 // < 0 for error (or the non-error ERR_IO_PENDING). | |
| 453 int SSLServerSocketOpenSSL::BufferSend() { | |
| 454 if (transport_send_busy_) | |
| 455 return ERR_IO_PENDING; | |
| 456 | |
| 457 if (!send_buffer_) { | |
| 458 // Get a fresh send buffer out of the send BIO. | |
| 459 size_t max_read = BIO_pending(transport_bio_); | |
| 460 if (!max_read) | |
| 461 return 0; // Nothing pending in the OpenSSL write BIO. | |
| 462 send_buffer_ = new DrainableIOBuffer(new IOBuffer(max_read), max_read); | |
| 463 int read_bytes = BIO_read(transport_bio_, send_buffer_->data(), max_read); | |
| 464 DCHECK_GT(read_bytes, 0); | |
| 465 CHECK_EQ(static_cast<int>(max_read), read_bytes); | |
| 466 } | |
| 467 | |
| 468 int rv = transport_socket_->Write( | |
| 469 send_buffer_.get(), send_buffer_->BytesRemaining(), | |
| 470 base::Bind(&SSLServerSocketOpenSSL::BufferSendComplete, | |
| 471 base::Unretained(this))); | |
| 472 if (rv == ERR_IO_PENDING) { | |
| 473 transport_send_busy_ = true; | |
| 474 } else { | |
| 475 TransportWriteComplete(rv); | |
| 476 } | |
| 477 return rv; | |
| 478 } | |
| 479 | |
| 480 void SSLServerSocketOpenSSL::BufferSendComplete(int result) { | |
| 481 transport_send_busy_ = false; | |
| 482 TransportWriteComplete(result); | |
| 483 OnSendComplete(result); | |
| 484 } | |
| 485 | |
| 486 void SSLServerSocketOpenSSL::TransportWriteComplete(int result) { | |
| 487 DCHECK(ERR_IO_PENDING != result); | |
| 488 if (result < 0) { | |
| 489 // Got a socket write error; close the BIO to indicate this upward. | |
| 490 // | |
| 491 // TODO(davidben): The value of |result| gets lost. Feed the error back into | |
| 492 // the BIO so it gets (re-)detected in OnSendComplete. Perhaps with | |
| 493 // BIO_set_callback. | |
| 494 DVLOG(1) << "TransportWriteComplete error " << result; | |
| 495 (void)BIO_shutdown_wr(SSL_get_wbio(ssl_)); | |
| 496 | |
| 497 // Match the fix for http://crbug.com/249848 in NSS by erroring future reads | |
| 498 // from the socket after a write error. | |
| 499 // | |
| 500 // TODO(davidben): Avoid having read and write ends interact this way. | |
| 501 transport_write_error_ = result; | |
| 502 (void)BIO_shutdown_wr(transport_bio_); | |
| 503 send_buffer_ = NULL; | |
| 504 } else { | |
| 505 DCHECK(send_buffer_); | |
| 506 send_buffer_->DidConsume(result); | |
| 507 DCHECK_GE(send_buffer_->BytesRemaining(), 0); | |
| 508 if (send_buffer_->BytesRemaining() <= 0) | |
| 509 send_buffer_ = NULL; | |
| 510 } | |
| 511 } | |
| 512 | |
| 513 int SSLServerSocketOpenSSL::BufferRecv() { | |
| 514 if (transport_recv_busy_) | |
| 515 return ERR_IO_PENDING; | |
| 516 | |
| 517 // Determine how much was requested from |transport_bio_| that was not | |
| 518 // actually available. | |
| 519 size_t requested = BIO_ctrl_get_read_request(transport_bio_); | |
| 520 if (requested == 0) { | |
| 521 // This is not a perfect match of error codes, as no operation is | |
| 522 // actually pending. However, returning 0 would be interpreted as | |
| 523 // a possible sign of EOF, which is also an inappropriate match. | |
| 524 return ERR_IO_PENDING; | |
| 525 } | |
| 526 | |
| 527 // Known Issue: While only reading |requested| data is the more correct | |
| 528 // implementation, it has the downside of resulting in frequent reads: | |
| 529 // One read for the SSL record header (~5 bytes) and one read for the SSL | |
| 530 // record body. Rather than issuing these reads to the underlying socket | |
| 531 // (and constantly allocating new IOBuffers), a single Read() request to | |
| 532 // fill |transport_bio_| is issued. As long as an SSL client socket cannot | |
| 533 // be gracefully shutdown (via SSL close alerts) and re-used for non-SSL | |
| 534 // traffic, this over-subscribed Read()ing will not cause issues. | |
| 535 size_t max_write = BIO_ctrl_get_write_guarantee(transport_bio_); | |
| 536 if (!max_write) | |
| 537 return ERR_IO_PENDING; | |
| 538 | |
| 539 recv_buffer_ = new IOBuffer(max_write); | |
| 540 int rv = transport_socket_->Read( | |
| 541 recv_buffer_.get(), max_write, | |
| 542 base::Bind(&SSLServerSocketOpenSSL::BufferRecvComplete, | |
| 543 base::Unretained(this))); | |
| 544 if (rv == ERR_IO_PENDING) { | |
| 545 transport_recv_busy_ = true; | |
| 546 } else { | |
| 547 rv = TransportReadComplete(rv); | |
| 548 } | |
| 549 return rv; | |
| 550 } | |
| 551 | |
| 552 void SSLServerSocketOpenSSL::BufferRecvComplete(int result) { | |
| 553 result = TransportReadComplete(result); | |
| 554 OnRecvComplete(result); | |
| 555 } | |
| 556 | |
| 557 int SSLServerSocketOpenSSL::TransportReadComplete(int result) { | |
| 558 DCHECK(ERR_IO_PENDING != result); | |
| 559 if (result <= 0) { | |
| 560 DVLOG(1) << "TransportReadComplete result " << result; | |
| 561 // Received 0 (end of file) or an error. Either way, bubble it up to the | |
| 562 // SSL layer via the BIO. TODO(joth): consider stashing the error code, to | |
| 563 // relay up to the SSL socket client (i.e. via DoReadCallback). | |
| 564 if (result == 0) | |
| 565 transport_recv_eof_ = true; | |
| 566 (void)BIO_shutdown_wr(transport_bio_); | |
| 567 } else if (transport_write_error_ < 0) { | |
| 568 // Mirror transport write errors as read failures; transport_bio_ has been | |
| 569 // shut down by TransportWriteComplete, so the BIO_write will fail, failing | |
| 570 // the CHECK. http://crbug.com/335557. | |
| 571 result = transport_write_error_; | |
| 572 } else { | |
| 573 DCHECK(recv_buffer_); | |
| 574 int ret = BIO_write(transport_bio_, recv_buffer_->data(), result); | |
| 575 // A write into a memory BIO should always succeed. | |
| 576 DCHECK_EQ(result, ret); | |
| 577 } | |
| 578 recv_buffer_ = NULL; | |
| 579 transport_recv_busy_ = false; | |
| 580 return result; | |
| 581 } | |
| 582 | |
| 583 // Do as much network I/O as possible between the buffer and the | |
| 584 // transport socket. Return true if some I/O performed, false | |
| 585 // otherwise (error or ERR_IO_PENDING). | |
| 586 bool SSLServerSocketOpenSSL::DoTransportIO() { | |
| 587 bool network_moved = false; | |
| 588 int rv; | |
| 589 // Read and write as much data as possible. The loop is necessary because | |
| 590 // Write() may return synchronously. | |
| 591 do { | |
| 592 rv = BufferSend(); | |
| 593 if (rv != ERR_IO_PENDING && rv != 0) | |
| 594 network_moved = true; | |
| 595 } while (rv > 0); | |
| 596 if (!transport_recv_eof_ && BufferRecv() != ERR_IO_PENDING) | |
| 597 network_moved = true; | |
| 598 return network_moved; | |
| 599 } | |
| 600 | |
| 601 int SSLServerSocketOpenSSL::DoPayloadRead() { | |
| 602 DCHECK(user_read_buf_); | |
| 603 DCHECK_GT(user_read_buf_len_, 0); | |
| 604 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 605 int rv = SSL_read(ssl_, user_read_buf_->data(), user_read_buf_len_); | |
| 606 if (rv >= 0) | |
| 607 return rv; | |
| 608 int ssl_error = SSL_get_error(ssl_, rv); | |
| 609 OpenSSLErrorInfo error_info; | |
| 610 int net_error = MapOpenSSLErrorWithDetails(ssl_error, err_tracer, | |
| 611 &error_info); | |
| 612 if (net_error != ERR_IO_PENDING) { | |
| 613 net_log_.AddEvent( | |
| 614 NetLog::TYPE_SSL_READ_ERROR, | |
| 615 CreateNetLogOpenSSLErrorCallback(net_error, ssl_error, error_info)); | |
| 616 } | |
| 617 return net_error; | |
| 618 } | |
| 619 | |
| 620 int SSLServerSocketOpenSSL::DoPayloadWrite() { | |
| 621 DCHECK(user_write_buf_); | |
| 622 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 623 int rv = SSL_write(ssl_, user_write_buf_->data(), user_write_buf_len_); | |
| 624 if (rv >= 0) | |
| 625 return rv; | |
| 626 int ssl_error = SSL_get_error(ssl_, rv); | |
| 627 OpenSSLErrorInfo error_info; | |
| 628 int net_error = MapOpenSSLErrorWithDetails(ssl_error, err_tracer, | |
| 629 &error_info); | |
| 630 if (net_error != ERR_IO_PENDING) { | |
| 631 net_log_.AddEvent( | |
| 632 NetLog::TYPE_SSL_WRITE_ERROR, | |
| 633 CreateNetLogOpenSSLErrorCallback(net_error, ssl_error, error_info)); | |
| 634 } | |
| 635 return net_error; | |
| 636 } | |
| 637 | |
| 638 int SSLServerSocketOpenSSL::DoHandshakeLoop(int last_io_result) { | |
| 639 int rv = last_io_result; | |
| 640 do { | |
| 641 // Default to STATE_NONE for next state. | |
| 642 // (This is a quirk carried over from the windows | |
| 643 // implementation. It makes reading the logs a bit harder.) | |
| 644 // State handlers can and often do call GotoState just | |
| 645 // to stay in the current state. | |
| 646 State state = next_handshake_state_; | |
| 647 GotoState(STATE_NONE); | |
| 648 switch (state) { | |
| 649 case STATE_HANDSHAKE: | |
| 650 rv = DoHandshake(); | |
| 651 break; | |
| 652 case STATE_NONE: | |
| 653 default: | |
| 654 rv = ERR_UNEXPECTED; | |
| 655 LOG(DFATAL) << "unexpected state " << state; | |
| 656 break; | |
| 657 } | |
| 658 | |
| 659 // Do the actual network I/O | |
| 660 bool network_moved = DoTransportIO(); | |
| 661 if (network_moved && next_handshake_state_ == STATE_HANDSHAKE) { | |
| 662 // In general we exit the loop if rv is ERR_IO_PENDING. In this | |
| 663 // special case we keep looping even if rv is ERR_IO_PENDING because | |
| 664 // the transport IO may allow DoHandshake to make progress. | |
| 665 rv = OK; // This causes us to stay in the loop. | |
| 666 } | |
| 667 } while (rv != ERR_IO_PENDING && next_handshake_state_ != STATE_NONE); | |
| 668 return rv; | |
| 669 } | |
| 670 | |
| 671 int SSLServerSocketOpenSSL::DoReadLoop(int result) { | |
| 672 DCHECK(completed_handshake_); | |
| 673 DCHECK(next_handshake_state_ == STATE_NONE); | |
| 674 | |
| 675 if (result < 0) | |
| 676 return result; | |
| 677 | |
| 678 bool network_moved; | |
| 679 int rv; | |
| 680 do { | |
| 681 rv = DoPayloadRead(); | |
| 682 network_moved = DoTransportIO(); | |
| 683 } while (rv == ERR_IO_PENDING && network_moved); | |
| 684 return rv; | |
| 685 } | |
| 686 | |
| 687 int SSLServerSocketOpenSSL::DoWriteLoop(int result) { | |
| 688 DCHECK(completed_handshake_); | |
| 689 DCHECK_EQ(next_handshake_state_, STATE_NONE); | |
| 690 | |
| 691 if (result < 0) | |
| 692 return result; | |
| 693 | |
| 694 bool network_moved; | |
| 695 int rv; | |
| 696 do { | |
| 697 rv = DoPayloadWrite(); | |
| 698 network_moved = DoTransportIO(); | |
| 699 } while (rv == ERR_IO_PENDING && network_moved); | |
| 700 return rv; | |
| 701 } | |
| 702 | |
| 703 int SSLServerSocketOpenSSL::DoHandshake() { | |
| 704 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 705 int net_error = OK; | |
| 706 int rv = SSL_do_handshake(ssl_); | |
| 707 | |
| 708 if (rv == 1) { | |
| 709 completed_handshake_ = true; | |
| 710 // The results of SSL_get_peer_certificate() must be explicitly freed. | |
| 711 ScopedX509 cert(SSL_get_peer_certificate(ssl_)); | |
| 712 if (cert) { | |
| 713 // The caller does not take ownership of SSL_get_peer_cert_chain's | |
| 714 // results. | |
| 715 STACK_OF(X509)* chain = SSL_get_peer_cert_chain(ssl_); | |
| 716 client_cert_ = CreateX509Certificate(cert.get(), chain); | |
| 717 if (!client_cert_.get()) | |
| 718 return ERR_SSL_CLIENT_AUTH_CERT_BAD_FORMAT; | |
| 719 } | |
| 720 } else { | |
| 721 int ssl_error = SSL_get_error(ssl_, rv); | |
| 722 OpenSSLErrorInfo error_info; | |
| 723 net_error = MapOpenSSLErrorWithDetails(ssl_error, err_tracer, &error_info); | |
| 724 | |
| 725 // This hack is necessary because the mapping of SSL error codes to | |
| 726 // net_errors assumes (correctly for client sockets, but erroneously for | |
| 727 // server sockets) that peer cert verification failure can only occur if | |
| 728 // the cert changed during a renego. crbug.com/570351 | |
| 729 if (net_error == ERR_SSL_SERVER_CERT_CHANGED) | |
| 730 net_error = ERR_BAD_SSL_CLIENT_AUTH_CERT; | |
| 731 | |
| 732 // If not done, stay in this state | |
| 733 if (net_error == ERR_IO_PENDING) { | |
| 734 GotoState(STATE_HANDSHAKE); | |
| 735 } else { | |
| 736 LOG(ERROR) << "handshake failed; returned " << rv | |
| 737 << ", SSL error code " << ssl_error | |
| 738 << ", net_error " << net_error; | |
| 739 net_log_.AddEvent( | |
| 740 NetLog::TYPE_SSL_HANDSHAKE_ERROR, | |
| 741 CreateNetLogOpenSSLErrorCallback(net_error, ssl_error, error_info)); | |
| 742 } | |
| 743 } | |
| 744 return net_error; | |
| 745 } | |
| 746 | |
| 747 void SSLServerSocketOpenSSL::DoHandshakeCallback(int rv) { | |
| 748 DCHECK_NE(rv, ERR_IO_PENDING); | |
| 749 base::ResetAndReturn(&user_handshake_callback_).Run(rv > OK ? OK : rv); | |
| 750 } | |
| 751 | |
| 752 void SSLServerSocketOpenSSL::DoReadCallback(int rv) { | |
| 753 DCHECK(rv != ERR_IO_PENDING); | |
| 754 DCHECK(!user_read_callback_.is_null()); | |
| 755 | |
| 756 user_read_buf_ = NULL; | |
| 757 user_read_buf_len_ = 0; | |
| 758 base::ResetAndReturn(&user_read_callback_).Run(rv); | |
| 759 } | |
| 760 | |
| 761 void SSLServerSocketOpenSSL::DoWriteCallback(int rv) { | |
| 762 DCHECK(rv != ERR_IO_PENDING); | |
| 763 DCHECK(!user_write_callback_.is_null()); | |
| 764 | |
| 765 user_write_buf_ = NULL; | |
| 766 user_write_buf_len_ = 0; | |
| 767 base::ResetAndReturn(&user_write_callback_).Run(rv); | |
| 768 } | |
| 769 | |
| 770 int SSLServerSocketOpenSSL::Init() { | |
| 771 DCHECK(!transport_bio_); | |
| 772 | |
| 773 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 774 | |
| 775 if (!ssl_) | |
| 776 return ERR_UNEXPECTED; | |
| 777 | |
| 778 BIO* ssl_bio = NULL; | |
| 779 // 0 => use default buffer sizes. | |
| 780 if (!BIO_new_bio_pair(&ssl_bio, 0, &transport_bio_, 0)) | |
| 781 return ERR_UNEXPECTED; | |
| 782 DCHECK(ssl_bio); | |
| 783 DCHECK(transport_bio_); | |
| 784 | |
| 785 SSL_set_bio(ssl_, ssl_bio, ssl_bio); | |
| 786 | |
| 787 return OK; | |
| 788 } | |
| 789 | |
| 790 // static | |
| 791 int SSLServerSocketOpenSSL::CertVerifyCallback(X509_STORE_CTX* store_ctx, | |
| 792 void* arg) { | |
| 793 ClientCertVerifier* verifier = reinterpret_cast<ClientCertVerifier*>(arg); | |
| 794 // If a verifier was not supplied, all certificates are accepted. | |
| 795 if (!verifier) | |
| 796 return 1; | |
| 797 STACK_OF(X509)* chain = store_ctx->untrusted; | |
| 798 scoped_refptr<X509Certificate> client_cert( | |
| 799 CreateX509Certificate(nullptr, chain)); | |
| 800 if (!client_cert.get()) { | |
| 801 X509_STORE_CTX_set_error(store_ctx, X509_V_ERR_CERT_REJECTED); | |
| 802 return 0; | |
| 803 } | |
| 804 // Asynchronous completion of Verify is currently not supported. | |
| 805 // http://crbug.com/347402 | |
| 806 // The API for Verify supports the parts needed for async completion | |
| 807 // but is currently expected to complete synchronously. | |
| 808 std::unique_ptr<ClientCertVerifier::Request> ignore_async; | |
| 809 int res = | |
| 810 verifier->Verify(client_cert.get(), CompletionCallback(), &ignore_async); | |
| 811 DCHECK_NE(res, ERR_IO_PENDING); | |
| 812 | |
| 813 if (res != OK) { | |
| 814 X509_STORE_CTX_set_error(store_ctx, X509_V_ERR_CERT_REJECTED); | |
| 815 return 0; | |
| 816 } | |
| 817 return 1; | |
| 818 } | |
| 819 | |
| 820 } // namespace | |
| 821 | |
| 822 std::unique_ptr<SSLServerContext> CreateSSLServerContext( | |
| 823 X509Certificate* certificate, | |
| 824 const crypto::RSAPrivateKey& key, | |
| 825 const SSLServerConfig& ssl_server_config) { | |
| 826 return std::unique_ptr<SSLServerContext>( | |
| 827 new SSLServerContextOpenSSL(certificate, key, ssl_server_config)); | |
| 828 } | |
| 829 | |
| 830 SSLServerContextOpenSSL::SSLServerContextOpenSSL( | |
| 831 X509Certificate* certificate, | |
| 832 const crypto::RSAPrivateKey& key, | |
| 833 const SSLServerConfig& ssl_server_config) | |
| 834 : ssl_server_config_(ssl_server_config), | |
| 835 cert_(certificate), | |
| 836 key_(key.Copy()) { | |
| 837 CHECK(key_); | |
| 838 crypto::EnsureOpenSSLInit(); | |
| 839 ssl_ctx_.reset(SSL_CTX_new(TLS_method())); | |
| 840 SSL_CTX_set_session_cache_mode(ssl_ctx_.get(), SSL_SESS_CACHE_SERVER); | |
| 841 uint8_t session_ctx_id = 0; | |
| 842 SSL_CTX_set_session_id_context(ssl_ctx_.get(), &session_ctx_id, | |
| 843 sizeof(session_ctx_id)); | |
| 844 | |
| 845 int verify_mode = 0; | |
| 846 switch (ssl_server_config_.client_cert_type) { | |
| 847 case SSLServerConfig::ClientCertType::REQUIRE_CLIENT_CERT: | |
| 848 verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT; | |
| 849 // Fall-through | |
| 850 case SSLServerConfig::ClientCertType::OPTIONAL_CLIENT_CERT: | |
| 851 verify_mode |= SSL_VERIFY_PEER; | |
| 852 SSL_CTX_set_verify(ssl_ctx_.get(), verify_mode, nullptr); | |
| 853 SSL_CTX_set_cert_verify_callback( | |
| 854 ssl_ctx_.get(), SSLServerSocketOpenSSL::CertVerifyCallback, | |
| 855 ssl_server_config_.client_cert_verifier); | |
| 856 break; | |
| 857 case SSLServerConfig::ClientCertType::NO_CLIENT_CERT: | |
| 858 break; | |
| 859 } | |
| 860 | |
| 861 // Set certificate and private key. | |
| 862 DCHECK(cert_->os_cert_handle()); | |
| 863 #if defined(USE_OPENSSL_CERTS) | |
| 864 CHECK(SSL_CTX_use_certificate(ssl_ctx_.get(), cert_->os_cert_handle())); | |
| 865 #else | |
| 866 // Convert OSCertHandle to X509 structure. | |
| 867 std::string der_string; | |
| 868 CHECK(X509Certificate::GetDEREncoded(cert_->os_cert_handle(), &der_string)); | |
| 869 | |
| 870 const unsigned char* der_string_array = | |
| 871 reinterpret_cast<const unsigned char*>(der_string.data()); | |
| 872 | |
| 873 ScopedX509 x509(d2i_X509(NULL, &der_string_array, der_string.length())); | |
| 874 CHECK(x509); | |
| 875 | |
| 876 // On success, SSL_CTX_use_certificate acquires a reference to |x509|. | |
| 877 CHECK(SSL_CTX_use_certificate(ssl_ctx_.get(), x509.get())); | |
| 878 #endif // USE_OPENSSL_CERTS | |
| 879 | |
| 880 DCHECK(key_->key()); | |
| 881 CHECK(SSL_CTX_use_PrivateKey(ssl_ctx_.get(), key_->key())); | |
| 882 | |
| 883 DCHECK_LT(SSL3_VERSION, ssl_server_config_.version_min); | |
| 884 DCHECK_LT(SSL3_VERSION, ssl_server_config_.version_max); | |
| 885 SSL_CTX_set_min_version(ssl_ctx_.get(), ssl_server_config_.version_min); | |
| 886 SSL_CTX_set_max_version(ssl_ctx_.get(), ssl_server_config_.version_max); | |
| 887 | |
| 888 // OpenSSL defaults some options to on, others to off. To avoid ambiguity, | |
| 889 // set everything we care about to an absolute value. | |
| 890 SslSetClearMask options; | |
| 891 options.ConfigureFlag(SSL_OP_NO_COMPRESSION, true); | |
| 892 | |
| 893 SSL_CTX_set_options(ssl_ctx_.get(), options.set_mask); | |
| 894 SSL_CTX_clear_options(ssl_ctx_.get(), options.clear_mask); | |
| 895 | |
| 896 // Same as above, this time for the SSL mode. | |
| 897 SslSetClearMask mode; | |
| 898 | |
| 899 mode.ConfigureFlag(SSL_MODE_RELEASE_BUFFERS, true); | |
| 900 | |
| 901 SSL_CTX_set_mode(ssl_ctx_.get(), mode.set_mask); | |
| 902 SSL_CTX_clear_mode(ssl_ctx_.get(), mode.clear_mask); | |
| 903 | |
| 904 // See SSLServerConfig::disabled_cipher_suites for description of the suites | |
| 905 // disabled by default. Note that !SHA256 and !SHA384 only remove HMAC-SHA256 | |
| 906 // and HMAC-SHA384 cipher suites, not GCM cipher suites with SHA256 or SHA384 | |
| 907 // as the handshake hash. | |
| 908 std::string command("DEFAULT:!SHA256:!SHA384:!AESGCM+AES256:!aPSK"); | |
| 909 | |
| 910 if (ssl_server_config_.require_ecdhe) | |
| 911 command.append(":!kRSA:!kDHE"); | |
| 912 | |
| 913 // Remove any disabled ciphers. | |
| 914 for (uint16_t id : ssl_server_config_.disabled_cipher_suites) { | |
| 915 const SSL_CIPHER* cipher = SSL_get_cipher_by_value(id); | |
| 916 if (cipher) { | |
| 917 command.append(":!"); | |
| 918 command.append(SSL_CIPHER_get_name(cipher)); | |
| 919 } | |
| 920 } | |
| 921 | |
| 922 int rv = SSL_CTX_set_cipher_list(ssl_ctx_.get(), command.c_str()); | |
| 923 // If this fails (rv = 0) it means there are no ciphers enabled on this SSL. | |
| 924 // This will almost certainly result in the socket failing to complete the | |
| 925 // handshake at which point the appropriate error is bubbled up to the client. | |
| 926 LOG_IF(WARNING, rv != 1) << "SSL_set_cipher_list('" << command | |
| 927 << "') returned " << rv; | |
| 928 | |
| 929 if (ssl_server_config_.client_cert_type != | |
| 930 SSLServerConfig::ClientCertType::NO_CLIENT_CERT && | |
| 931 !ssl_server_config_.cert_authorities_.empty()) { | |
| 932 ScopedX509NameStack stack(sk_X509_NAME_new_null()); | |
| 933 for (const auto& authority : ssl_server_config_.cert_authorities_) { | |
| 934 const uint8_t* name = reinterpret_cast<const uint8_t*>(authority.c_str()); | |
| 935 const uint8_t* name_start = name; | |
| 936 ScopedX509_NAME subj(d2i_X509_NAME(nullptr, &name, authority.length())); | |
| 937 CHECK(subj && name == name_start + authority.length()); | |
| 938 sk_X509_NAME_push(stack.get(), subj.release()); | |
| 939 } | |
| 940 SSL_CTX_set_client_CA_list(ssl_ctx_.get(), stack.release()); | |
| 941 } | |
| 942 } | |
| 943 | |
| 944 SSLServerContextOpenSSL::~SSLServerContextOpenSSL() {} | |
| 945 | |
| 946 std::unique_ptr<SSLServerSocket> SSLServerContextOpenSSL::CreateSSLServerSocket( | |
| 947 std::unique_ptr<StreamSocket> socket) { | |
| 948 SSL* ssl = SSL_new(ssl_ctx_.get()); | |
| 949 return std::unique_ptr<SSLServerSocket>( | |
| 950 new SSLServerSocketOpenSSL(std::move(socket), ssl)); | |
| 951 } | |
| 952 | |
| 953 void EnableSSLServerSockets() { | |
| 954 // No-op because CreateSSLServerSocket() calls crypto::EnsureOpenSSLInit(). | |
| 955 } | |
| 956 | |
| 957 } // namespace net | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1921563003:
Renaming _openssl files to _impl (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master