| OLD | NEW |
|---|
| (Empty) |
| 1 /* | |
| 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include "webrtc/base/opensslstreamadapter.h" | |
| 12 | |
| 13 #include <openssl/bio.h> | |
| 14 #include <openssl/crypto.h> | |
| 15 #include <openssl/err.h> | |
| 16 #include <openssl/rand.h> | |
| 17 #include <openssl/tls1.h> | |
| 18 #include <openssl/x509v3.h> | |
| 19 #ifndef OPENSSL_IS_BORINGSSL | |
| 20 #include <openssl/dtls1.h> | |
| 21 #include <openssl/ssl.h> | |
| 22 #endif | |
| 23 | |
| 24 #include <memory> | |
| 25 #include <vector> | |
| 26 | |
| 27 #include "webrtc/base/checks.h" | |
| 28 #include "webrtc/base/logging.h" | |
| 29 #include "webrtc/base/safe_conversions.h" | |
| 30 #include "webrtc/base/stream.h" | |
| 31 #include "webrtc/base/openssl.h" | |
| 32 #include "webrtc/base/openssladapter.h" | |
| 33 #include "webrtc/base/openssldigest.h" | |
| 34 #include "webrtc/base/opensslidentity.h" | |
| 35 #include "webrtc/base/stringutils.h" | |
| 36 #include "webrtc/base/timeutils.h" | |
| 37 #include "webrtc/base/thread.h" | |
| 38 | |
| 39 namespace { | |
| 40 bool g_use_time_callback_for_testing = false; | |
| 41 } | |
| 42 | |
| 43 namespace rtc { | |
| 44 | |
| 45 #if (OPENSSL_VERSION_NUMBER < 0x10001000L) | |
| 46 #error "webrtc requires at least OpenSSL version 1.0.1, to support DTLS-SRTP" | |
| 47 #endif | |
| 48 | |
| 49 // SRTP cipher suite table. |internal_name| is used to construct a | |
| 50 // colon-separated profile strings which is needed by | |
| 51 // SSL_CTX_set_tlsext_use_srtp(). | |
| 52 struct SrtpCipherMapEntry { | |
| 53 const char* internal_name; | |
| 54 const int id; | |
| 55 }; | |
| 56 | |
| 57 // This isn't elegant, but it's better than an external reference | |
| 58 static SrtpCipherMapEntry SrtpCipherMap[] = { | |
| 59 {"SRTP_AES128_CM_SHA1_80", SRTP_AES128_CM_SHA1_80}, | |
| 60 {"SRTP_AES128_CM_SHA1_32", SRTP_AES128_CM_SHA1_32}, | |
| 61 {"SRTP_AEAD_AES_128_GCM", SRTP_AEAD_AES_128_GCM}, | |
| 62 {"SRTP_AEAD_AES_256_GCM", SRTP_AEAD_AES_256_GCM}, | |
| 63 {nullptr, 0}}; | |
| 64 | |
| 65 #ifdef OPENSSL_IS_BORINGSSL | |
| 66 // Not used in production code. Actual time should be relative to Jan 1, 1970. | |
| 67 static void TimeCallbackForTesting(const SSL* ssl, struct timeval* out_clock) { | |
| 68 int64_t time = TimeNanos(); | |
| 69 out_clock->tv_sec = time / kNumNanosecsPerSec; | |
| 70 out_clock->tv_usec = (time % kNumNanosecsPerSec) / kNumNanosecsPerMicrosec; | |
| 71 } | |
| 72 #else // #ifdef OPENSSL_IS_BORINGSSL | |
| 73 | |
| 74 // Cipher name table. Maps internal OpenSSL cipher ids to the RFC name. | |
| 75 struct SslCipherMapEntry { | |
| 76 uint32_t openssl_id; | |
| 77 const char* rfc_name; | |
| 78 }; | |
| 79 | |
| 80 #define DEFINE_CIPHER_ENTRY_SSL3(name) {SSL3_CK_##name, "TLS_"#name} | |
| 81 #define DEFINE_CIPHER_ENTRY_TLS1(name) {TLS1_CK_##name, "TLS_"#name} | |
| 82 | |
| 83 // There currently is no method available to get a RFC-compliant name for a | |
| 84 // cipher suite from BoringSSL, so we need to define the mapping manually here. | |
| 85 // This should go away once BoringSSL supports "SSL_CIPHER_standard_name" | |
| 86 // (as available in OpenSSL if compiled with tracing enabled) or a similar | |
| 87 // method. | |
| 88 static const SslCipherMapEntry kSslCipherMap[] = { | |
| 89 // TLS v1.0 ciphersuites from RFC2246. | |
| 90 DEFINE_CIPHER_ENTRY_SSL3(RSA_RC4_128_SHA), | |
| 91 {SSL3_CK_RSA_DES_192_CBC3_SHA, "TLS_RSA_WITH_3DES_EDE_CBC_SHA"}, | |
| 92 | |
| 93 // AES ciphersuites from RFC3268. | |
| 94 {TLS1_CK_RSA_WITH_AES_128_SHA, "TLS_RSA_WITH_AES_128_CBC_SHA"}, | |
| 95 {TLS1_CK_DHE_RSA_WITH_AES_128_SHA, "TLS_DHE_RSA_WITH_AES_128_CBC_SHA"}, | |
| 96 {TLS1_CK_RSA_WITH_AES_256_SHA, "TLS_RSA_WITH_AES_256_CBC_SHA"}, | |
| 97 {TLS1_CK_DHE_RSA_WITH_AES_256_SHA, "TLS_DHE_RSA_WITH_AES_256_CBC_SHA"}, | |
| 98 | |
| 99 // ECC ciphersuites from RFC4492. | |
| 100 DEFINE_CIPHER_ENTRY_TLS1(ECDHE_ECDSA_WITH_RC4_128_SHA), | |
| 101 {TLS1_CK_ECDHE_ECDSA_WITH_DES_192_CBC3_SHA, | |
| 102 "TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA"}, | |
| 103 DEFINE_CIPHER_ENTRY_TLS1(ECDHE_ECDSA_WITH_AES_128_CBC_SHA), | |
| 104 DEFINE_CIPHER_ENTRY_TLS1(ECDHE_ECDSA_WITH_AES_256_CBC_SHA), | |
| 105 | |
| 106 DEFINE_CIPHER_ENTRY_TLS1(ECDHE_RSA_WITH_RC4_128_SHA), | |
| 107 {TLS1_CK_ECDHE_RSA_WITH_DES_192_CBC3_SHA, | |
| 108 "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA"}, | |
| 109 DEFINE_CIPHER_ENTRY_TLS1(ECDHE_RSA_WITH_AES_128_CBC_SHA), | |
| 110 DEFINE_CIPHER_ENTRY_TLS1(ECDHE_RSA_WITH_AES_256_CBC_SHA), | |
| 111 | |
| 112 // TLS v1.2 ciphersuites. | |
| 113 {TLS1_CK_RSA_WITH_AES_128_SHA256, "TLS_RSA_WITH_AES_128_CBC_SHA256"}, | |
| 114 {TLS1_CK_RSA_WITH_AES_256_SHA256, "TLS_RSA_WITH_AES_256_CBC_SHA256"}, | |
| 115 {TLS1_CK_DHE_RSA_WITH_AES_128_SHA256, | |
| 116 "TLS_DHE_RSA_WITH_AES_128_CBC_SHA256"}, | |
| 117 {TLS1_CK_DHE_RSA_WITH_AES_256_SHA256, | |
| 118 "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256"}, | |
| 119 | |
| 120 // TLS v1.2 GCM ciphersuites from RFC5288. | |
| 121 DEFINE_CIPHER_ENTRY_TLS1(RSA_WITH_AES_128_GCM_SHA256), | |
| 122 DEFINE_CIPHER_ENTRY_TLS1(RSA_WITH_AES_256_GCM_SHA384), | |
| 123 DEFINE_CIPHER_ENTRY_TLS1(DHE_RSA_WITH_AES_128_GCM_SHA256), | |
| 124 DEFINE_CIPHER_ENTRY_TLS1(DHE_RSA_WITH_AES_256_GCM_SHA384), | |
| 125 DEFINE_CIPHER_ENTRY_TLS1(DH_RSA_WITH_AES_128_GCM_SHA256), | |
| 126 DEFINE_CIPHER_ENTRY_TLS1(DH_RSA_WITH_AES_256_GCM_SHA384), | |
| 127 | |
| 128 // ECDH HMAC based ciphersuites from RFC5289. | |
| 129 {TLS1_CK_ECDHE_ECDSA_WITH_AES_128_SHA256, | |
| 130 "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256"}, | |
| 131 {TLS1_CK_ECDHE_ECDSA_WITH_AES_256_SHA384, | |
| 132 "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384"}, | |
| 133 {TLS1_CK_ECDHE_RSA_WITH_AES_128_SHA256, | |
| 134 "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"}, | |
| 135 {TLS1_CK_ECDHE_RSA_WITH_AES_256_SHA384, | |
| 136 "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384"}, | |
| 137 | |
| 138 // ECDH GCM based ciphersuites from RFC5289. | |
| 139 DEFINE_CIPHER_ENTRY_TLS1(ECDHE_ECDSA_WITH_AES_128_GCM_SHA256), | |
| 140 DEFINE_CIPHER_ENTRY_TLS1(ECDHE_ECDSA_WITH_AES_256_GCM_SHA384), | |
| 141 DEFINE_CIPHER_ENTRY_TLS1(ECDHE_RSA_WITH_AES_128_GCM_SHA256), | |
| 142 DEFINE_CIPHER_ENTRY_TLS1(ECDHE_RSA_WITH_AES_256_GCM_SHA384), | |
| 143 | |
| 144 {0, nullptr}}; | |
| 145 #endif // #ifndef OPENSSL_IS_BORINGSSL | |
| 146 | |
| 147 #if defined(_MSC_VER) | |
| 148 #pragma warning(push) | |
| 149 #pragma warning(disable : 4309) | |
| 150 #pragma warning(disable : 4310) | |
| 151 #endif // defined(_MSC_VER) | |
| 152 | |
| 153 #if defined(_MSC_VER) | |
| 154 #pragma warning(pop) | |
| 155 #endif // defined(_MSC_VER) | |
| 156 | |
| 157 ////////////////////////////////////////////////////////////////////// | |
| 158 // StreamBIO | |
| 159 ////////////////////////////////////////////////////////////////////// | |
| 160 | |
| 161 static int stream_write(BIO* h, const char* buf, int num); | |
| 162 static int stream_read(BIO* h, char* buf, int size); | |
| 163 static int stream_puts(BIO* h, const char* str); | |
| 164 static long stream_ctrl(BIO* h, int cmd, long arg1, void* arg2); | |
| 165 static int stream_new(BIO* h); | |
| 166 static int stream_free(BIO* data); | |
| 167 | |
| 168 // TODO(davidben): This should be const once BoringSSL is assumed. | |
| 169 static BIO_METHOD methods_stream = { | |
| 170 BIO_TYPE_BIO, "stream", stream_write, stream_read, stream_puts, 0, | |
| 171 stream_ctrl, stream_new, stream_free, nullptr, | |
| 172 }; | |
| 173 | |
| 174 static BIO_METHOD* BIO_s_stream() { return(&methods_stream); } | |
| 175 | |
| 176 static BIO* BIO_new_stream(StreamInterface* stream) { | |
| 177 BIO* ret = BIO_new(BIO_s_stream()); | |
| 178 if (ret == nullptr) | |
| 179 return nullptr; | |
| 180 ret->ptr = stream; | |
| 181 return ret; | |
| 182 } | |
| 183 | |
| 184 // bio methods return 1 (or at least non-zero) on success and 0 on failure. | |
| 185 | |
| 186 static int stream_new(BIO* b) { | |
| 187 b->shutdown = 0; | |
| 188 b->init = 1; | |
| 189 b->num = 0; // 1 means end-of-stream | |
| 190 b->ptr = 0; | |
| 191 return 1; | |
| 192 } | |
| 193 | |
| 194 static int stream_free(BIO* b) { | |
| 195 if (b == nullptr) | |
| 196 return 0; | |
| 197 return 1; | |
| 198 } | |
| 199 | |
| 200 static int stream_read(BIO* b, char* out, int outl) { | |
| 201 if (!out) | |
| 202 return -1; | |
| 203 StreamInterface* stream = static_cast<StreamInterface*>(b->ptr); | |
| 204 BIO_clear_retry_flags(b); | |
| 205 size_t read; | |
| 206 int error; | |
| 207 StreamResult result = stream->Read(out, outl, &read, &error); | |
| 208 if (result == SR_SUCCESS) { | |
| 209 return checked_cast<int>(read); | |
| 210 } else if (result == SR_EOS) { | |
| 211 b->num = 1; | |
| 212 } else if (result == SR_BLOCK) { | |
| 213 BIO_set_retry_read(b); | |
| 214 } | |
| 215 return -1; | |
| 216 } | |
| 217 | |
| 218 static int stream_write(BIO* b, const char* in, int inl) { | |
| 219 if (!in) | |
| 220 return -1; | |
| 221 StreamInterface* stream = static_cast<StreamInterface*>(b->ptr); | |
| 222 BIO_clear_retry_flags(b); | |
| 223 size_t written; | |
| 224 int error; | |
| 225 StreamResult result = stream->Write(in, inl, &written, &error); | |
| 226 if (result == SR_SUCCESS) { | |
| 227 return checked_cast<int>(written); | |
| 228 } else if (result == SR_BLOCK) { | |
| 229 BIO_set_retry_write(b); | |
| 230 } | |
| 231 return -1; | |
| 232 } | |
| 233 | |
| 234 static int stream_puts(BIO* b, const char* str) { | |
| 235 return stream_write(b, str, checked_cast<int>(strlen(str))); | |
| 236 } | |
| 237 | |
| 238 static long stream_ctrl(BIO* b, int cmd, long num, void* ptr) { | |
| 239 switch (cmd) { | |
| 240 case BIO_CTRL_RESET: | |
| 241 return 0; | |
| 242 case BIO_CTRL_EOF: | |
| 243 return b->num; | |
| 244 case BIO_CTRL_WPENDING: | |
| 245 case BIO_CTRL_PENDING: | |
| 246 return 0; | |
| 247 case BIO_CTRL_FLUSH: | |
| 248 return 1; | |
| 249 case BIO_CTRL_DGRAM_QUERY_MTU: | |
| 250 // openssl defaults to mtu=256 unless we return something here. | |
| 251 // The handshake doesn't actually need to send packets above 1k, | |
| 252 // so this seems like a sensible value that should work in most cases. | |
| 253 // Webrtc uses the same value for video packets. | |
| 254 return 1200; | |
| 255 default: | |
| 256 return 0; | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 ///////////////////////////////////////////////////////////////////////////// | |
| 261 // OpenSSLStreamAdapter | |
| 262 ///////////////////////////////////////////////////////////////////////////// | |
| 263 | |
| 264 OpenSSLStreamAdapter::OpenSSLStreamAdapter(StreamInterface* stream) | |
| 265 : SSLStreamAdapter(stream), | |
| 266 state_(SSL_NONE), | |
| 267 role_(SSL_CLIENT), | |
| 268 ssl_read_needs_write_(false), | |
| 269 ssl_write_needs_read_(false), | |
| 270 ssl_(nullptr), | |
| 271 ssl_ctx_(nullptr), | |
| 272 ssl_mode_(SSL_MODE_TLS), | |
| 273 ssl_max_version_(SSL_PROTOCOL_TLS_12) {} | |
| 274 | |
| 275 OpenSSLStreamAdapter::~OpenSSLStreamAdapter() { | |
| 276 Cleanup(0); | |
| 277 } | |
| 278 | |
| 279 void OpenSSLStreamAdapter::SetIdentity(SSLIdentity* identity) { | |
| 280 RTC_DCHECK(!identity_); | |
| 281 identity_.reset(static_cast<OpenSSLIdentity*>(identity)); | |
| 282 } | |
| 283 | |
| 284 void OpenSSLStreamAdapter::SetServerRole(SSLRole role) { | |
| 285 role_ = role; | |
| 286 } | |
| 287 | |
| 288 std::unique_ptr<SSLCertificate> OpenSSLStreamAdapter::GetPeerCertificate() | |
| 289 const { | |
| 290 return peer_certificate_ ? std::unique_ptr<SSLCertificate>( | |
| 291 peer_certificate_->GetReference()) | |
| 292 : nullptr; | |
| 293 } | |
| 294 | |
| 295 bool OpenSSLStreamAdapter::SetPeerCertificateDigest( | |
| 296 const std::string& digest_alg, | |
| 297 const unsigned char* digest_val, | |
| 298 size_t digest_len, | |
| 299 SSLPeerCertificateDigestError* error) { | |
| 300 RTC_DCHECK(!peer_certificate_verified_); | |
| 301 RTC_DCHECK(!has_peer_certificate_digest()); | |
| 302 size_t expected_len; | |
| 303 if (error) { | |
| 304 *error = SSLPeerCertificateDigestError::NONE; | |
| 305 } | |
| 306 | |
| 307 if (!OpenSSLDigest::GetDigestSize(digest_alg, &expected_len)) { | |
| 308 LOG(LS_WARNING) << "Unknown digest algorithm: " << digest_alg; | |
| 309 if (error) { | |
| 310 *error = SSLPeerCertificateDigestError::UNKNOWN_ALGORITHM; | |
| 311 } | |
| 312 return false; | |
| 313 } | |
| 314 if (expected_len != digest_len) { | |
| 315 if (error) { | |
| 316 *error = SSLPeerCertificateDigestError::INVALID_LENGTH; | |
| 317 } | |
| 318 return false; | |
| 319 } | |
| 320 | |
| 321 peer_certificate_digest_value_.SetData(digest_val, digest_len); | |
| 322 peer_certificate_digest_algorithm_ = digest_alg; | |
| 323 | |
| 324 if (!peer_certificate_) { | |
| 325 // Normal case, where the digest is set before we obtain the certificate | |
| 326 // from the handshake. | |
| 327 return true; | |
| 328 } | |
| 329 | |
| 330 if (!VerifyPeerCertificate()) { | |
| 331 Error("SetPeerCertificateDigest", -1, SSL_AD_BAD_CERTIFICATE, false); | |
| 332 if (error) { | |
| 333 *error = SSLPeerCertificateDigestError::VERIFICATION_FAILED; | |
| 334 } | |
| 335 return false; | |
| 336 } | |
| 337 | |
| 338 if (state_ == SSL_CONNECTED) { | |
| 339 // Post the event asynchronously to unwind the stack. The caller | |
| 340 // of ContinueSSL may be the same object listening for these | |
| 341 // events and may not be prepared for reentrancy. | |
| 342 PostEvent(SE_OPEN | SE_READ | SE_WRITE, 0); | |
| 343 } | |
| 344 | |
| 345 return true; | |
| 346 } | |
| 347 | |
| 348 std::string OpenSSLStreamAdapter::SslCipherSuiteToName(int cipher_suite) { | |
| 349 #ifdef OPENSSL_IS_BORINGSSL | |
| 350 const SSL_CIPHER* ssl_cipher = SSL_get_cipher_by_value(cipher_suite); | |
| 351 if (!ssl_cipher) { | |
| 352 return std::string(); | |
| 353 } | |
| 354 char* cipher_name = SSL_CIPHER_get_rfc_name(ssl_cipher); | |
| 355 std::string rfc_name = std::string(cipher_name); | |
| 356 OPENSSL_free(cipher_name); | |
| 357 return rfc_name; | |
| 358 #else | |
| 359 for (const SslCipherMapEntry* entry = kSslCipherMap; entry->rfc_name; | |
| 360 ++entry) { | |
| 361 if (cipher_suite == static_cast<int>(entry->openssl_id)) { | |
| 362 return entry->rfc_name; | |
| 363 } | |
| 364 } | |
| 365 return std::string(); | |
| 366 #endif | |
| 367 } | |
| 368 | |
| 369 bool OpenSSLStreamAdapter::GetSslCipherSuite(int* cipher_suite) { | |
| 370 if (state_ != SSL_CONNECTED) | |
| 371 return false; | |
| 372 | |
| 373 const SSL_CIPHER* current_cipher = SSL_get_current_cipher(ssl_); | |
| 374 if (current_cipher == nullptr) { | |
| 375 return false; | |
| 376 } | |
| 377 | |
| 378 *cipher_suite = static_cast<uint16_t>(SSL_CIPHER_get_id(current_cipher)); | |
| 379 return true; | |
| 380 } | |
| 381 | |
| 382 int OpenSSLStreamAdapter::GetSslVersion() const { | |
| 383 if (state_ != SSL_CONNECTED) | |
| 384 return -1; | |
| 385 | |
| 386 int ssl_version = SSL_version(ssl_); | |
| 387 if (ssl_mode_ == SSL_MODE_DTLS) { | |
| 388 if (ssl_version == DTLS1_VERSION) | |
| 389 return SSL_PROTOCOL_DTLS_10; | |
| 390 else if (ssl_version == DTLS1_2_VERSION) | |
| 391 return SSL_PROTOCOL_DTLS_12; | |
| 392 } else { | |
| 393 if (ssl_version == TLS1_VERSION) | |
| 394 return SSL_PROTOCOL_TLS_10; | |
| 395 else if (ssl_version == TLS1_1_VERSION) | |
| 396 return SSL_PROTOCOL_TLS_11; | |
| 397 else if (ssl_version == TLS1_2_VERSION) | |
| 398 return SSL_PROTOCOL_TLS_12; | |
| 399 } | |
| 400 | |
| 401 return -1; | |
| 402 } | |
| 403 | |
| 404 // Key Extractor interface | |
| 405 bool OpenSSLStreamAdapter::ExportKeyingMaterial(const std::string& label, | |
| 406 const uint8_t* context, | |
| 407 size_t context_len, | |
| 408 bool use_context, | |
| 409 uint8_t* result, | |
| 410 size_t result_len) { | |
| 411 int i; | |
| 412 | |
| 413 i = SSL_export_keying_material(ssl_, result, result_len, label.c_str(), | |
| 414 label.length(), const_cast<uint8_t*>(context), | |
| 415 context_len, use_context); | |
| 416 | |
| 417 if (i != 1) | |
| 418 return false; | |
| 419 | |
| 420 return true; | |
| 421 } | |
| 422 | |
| 423 bool OpenSSLStreamAdapter::SetDtlsSrtpCryptoSuites( | |
| 424 const std::vector<int>& ciphers) { | |
| 425 std::string internal_ciphers; | |
| 426 | |
| 427 if (state_ != SSL_NONE) | |
| 428 return false; | |
| 429 | |
| 430 for (std::vector<int>::const_iterator cipher = ciphers.begin(); | |
| 431 cipher != ciphers.end(); ++cipher) { | |
| 432 bool found = false; | |
| 433 for (SrtpCipherMapEntry* entry = SrtpCipherMap; entry->internal_name; | |
| 434 ++entry) { | |
| 435 if (*cipher == entry->id) { | |
| 436 found = true; | |
| 437 if (!internal_ciphers.empty()) | |
| 438 internal_ciphers += ":"; | |
| 439 internal_ciphers += entry->internal_name; | |
| 440 break; | |
| 441 } | |
| 442 } | |
| 443 | |
| 444 if (!found) { | |
| 445 LOG(LS_ERROR) << "Could not find cipher: " << *cipher; | |
| 446 return false; | |
| 447 } | |
| 448 } | |
| 449 | |
| 450 if (internal_ciphers.empty()) | |
| 451 return false; | |
| 452 | |
| 453 srtp_ciphers_ = internal_ciphers; | |
| 454 return true; | |
| 455 } | |
| 456 | |
| 457 bool OpenSSLStreamAdapter::GetDtlsSrtpCryptoSuite(int* crypto_suite) { | |
| 458 RTC_DCHECK(state_ == SSL_CONNECTED); | |
| 459 if (state_ != SSL_CONNECTED) | |
| 460 return false; | |
| 461 | |
| 462 const SRTP_PROTECTION_PROFILE *srtp_profile = | |
| 463 SSL_get_selected_srtp_profile(ssl_); | |
| 464 | |
| 465 if (!srtp_profile) | |
| 466 return false; | |
| 467 | |
| 468 *crypto_suite = srtp_profile->id; | |
| 469 RTC_DCHECK(!SrtpCryptoSuiteToName(*crypto_suite).empty()); | |
| 470 return true; | |
| 471 } | |
| 472 | |
| 473 bool OpenSSLStreamAdapter::IsTlsConnected() { | |
| 474 return state_ == SSL_CONNECTED; | |
| 475 } | |
| 476 | |
| 477 int OpenSSLStreamAdapter::StartSSL() { | |
| 478 if (state_ != SSL_NONE) { | |
| 479 // Don't allow StartSSL to be called twice. | |
| 480 return -1; | |
| 481 } | |
| 482 | |
| 483 if (StreamAdapterInterface::GetState() != SS_OPEN) { | |
| 484 state_ = SSL_WAIT; | |
| 485 return 0; | |
| 486 } | |
| 487 | |
| 488 state_ = SSL_CONNECTING; | |
| 489 if (int err = BeginSSL()) { | |
| 490 Error("BeginSSL", err, 0, false); | |
| 491 return err; | |
| 492 } | |
| 493 | |
| 494 return 0; | |
| 495 } | |
| 496 | |
| 497 void OpenSSLStreamAdapter::SetMode(SSLMode mode) { | |
| 498 RTC_DCHECK(state_ == SSL_NONE); | |
| 499 ssl_mode_ = mode; | |
| 500 } | |
| 501 | |
| 502 void OpenSSLStreamAdapter::SetMaxProtocolVersion(SSLProtocolVersion version) { | |
| 503 RTC_DCHECK(ssl_ctx_ == nullptr); | |
| 504 ssl_max_version_ = version; | |
| 505 } | |
| 506 | |
| 507 void OpenSSLStreamAdapter::SetInitialRetransmissionTimeout( | |
| 508 int timeout_ms) { | |
| 509 RTC_DCHECK(ssl_ctx_ == nullptr); | |
| 510 dtls_handshake_timeout_ms_ = timeout_ms; | |
| 511 } | |
| 512 | |
| 513 // | |
| 514 // StreamInterface Implementation | |
| 515 // | |
| 516 | |
| 517 StreamResult OpenSSLStreamAdapter::Write(const void* data, size_t data_len, | |
| 518 size_t* written, int* error) { | |
| 519 LOG(LS_VERBOSE) << "OpenSSLStreamAdapter::Write(" << data_len << ")"; | |
| 520 | |
| 521 switch (state_) { | |
| 522 case SSL_NONE: | |
| 523 // pass-through in clear text | |
| 524 return StreamAdapterInterface::Write(data, data_len, written, error); | |
| 525 | |
| 526 case SSL_WAIT: | |
| 527 case SSL_CONNECTING: | |
| 528 return SR_BLOCK; | |
| 529 | |
| 530 case SSL_CONNECTED: | |
| 531 if (waiting_to_verify_peer_certificate()) { | |
| 532 return SR_BLOCK; | |
| 533 } | |
| 534 break; | |
| 535 | |
| 536 case SSL_ERROR: | |
| 537 case SSL_CLOSED: | |
| 538 default: | |
| 539 if (error) | |
| 540 *error = ssl_error_code_; | |
| 541 return SR_ERROR; | |
| 542 } | |
| 543 | |
| 544 // OpenSSL will return an error if we try to write zero bytes | |
| 545 if (data_len == 0) { | |
| 546 if (written) | |
| 547 *written = 0; | |
| 548 return SR_SUCCESS; | |
| 549 } | |
| 550 | |
| 551 ssl_write_needs_read_ = false; | |
| 552 | |
| 553 int code = SSL_write(ssl_, data, checked_cast<int>(data_len)); | |
| 554 int ssl_error = SSL_get_error(ssl_, code); | |
| 555 switch (ssl_error) { | |
| 556 case SSL_ERROR_NONE: | |
| 557 LOG(LS_VERBOSE) << " -- success"; | |
| 558 RTC_DCHECK(0 < code && static_cast<unsigned>(code) <= data_len); | |
| 559 if (written) | |
| 560 *written = code; | |
| 561 return SR_SUCCESS; | |
| 562 case SSL_ERROR_WANT_READ: | |
| 563 LOG(LS_VERBOSE) << " -- error want read"; | |
| 564 ssl_write_needs_read_ = true; | |
| 565 return SR_BLOCK; | |
| 566 case SSL_ERROR_WANT_WRITE: | |
| 567 LOG(LS_VERBOSE) << " -- error want write"; | |
| 568 return SR_BLOCK; | |
| 569 | |
| 570 case SSL_ERROR_ZERO_RETURN: | |
| 571 default: | |
| 572 Error("SSL_write", (ssl_error ? ssl_error : -1), 0, false); | |
| 573 if (error) | |
| 574 *error = ssl_error_code_; | |
| 575 return SR_ERROR; | |
| 576 } | |
| 577 // not reached | |
| 578 } | |
| 579 | |
| 580 StreamResult OpenSSLStreamAdapter::Read(void* data, size_t data_len, | |
| 581 size_t* read, int* error) { | |
| 582 LOG(LS_VERBOSE) << "OpenSSLStreamAdapter::Read(" << data_len << ")"; | |
| 583 switch (state_) { | |
| 584 case SSL_NONE: | |
| 585 // pass-through in clear text | |
| 586 return StreamAdapterInterface::Read(data, data_len, read, error); | |
| 587 | |
| 588 case SSL_WAIT: | |
| 589 case SSL_CONNECTING: | |
| 590 return SR_BLOCK; | |
| 591 | |
| 592 case SSL_CONNECTED: | |
| 593 if (waiting_to_verify_peer_certificate()) { | |
| 594 return SR_BLOCK; | |
| 595 } | |
| 596 break; | |
| 597 | |
| 598 case SSL_CLOSED: | |
| 599 return SR_EOS; | |
| 600 | |
| 601 case SSL_ERROR: | |
| 602 default: | |
| 603 if (error) | |
| 604 *error = ssl_error_code_; | |
| 605 return SR_ERROR; | |
| 606 } | |
| 607 | |
| 608 // Don't trust OpenSSL with zero byte reads | |
| 609 if (data_len == 0) { | |
| 610 if (read) | |
| 611 *read = 0; | |
| 612 return SR_SUCCESS; | |
| 613 } | |
| 614 | |
| 615 ssl_read_needs_write_ = false; | |
| 616 | |
| 617 int code = SSL_read(ssl_, data, checked_cast<int>(data_len)); | |
| 618 int ssl_error = SSL_get_error(ssl_, code); | |
| 619 switch (ssl_error) { | |
| 620 case SSL_ERROR_NONE: | |
| 621 LOG(LS_VERBOSE) << " -- success"; | |
| 622 RTC_DCHECK(0 < code && static_cast<unsigned>(code) <= data_len); | |
| 623 if (read) | |
| 624 *read = code; | |
| 625 | |
| 626 if (ssl_mode_ == SSL_MODE_DTLS) { | |
| 627 // Enforce atomic reads -- this is a short read | |
| 628 unsigned int pending = SSL_pending(ssl_); | |
| 629 | |
| 630 if (pending) { | |
| 631 LOG(LS_INFO) << " -- short DTLS read. flushing"; | |
| 632 FlushInput(pending); | |
| 633 if (error) | |
| 634 *error = SSE_MSG_TRUNC; | |
| 635 return SR_ERROR; | |
| 636 } | |
| 637 } | |
| 638 return SR_SUCCESS; | |
| 639 case SSL_ERROR_WANT_READ: | |
| 640 LOG(LS_VERBOSE) << " -- error want read"; | |
| 641 return SR_BLOCK; | |
| 642 case SSL_ERROR_WANT_WRITE: | |
| 643 LOG(LS_VERBOSE) << " -- error want write"; | |
| 644 ssl_read_needs_write_ = true; | |
| 645 return SR_BLOCK; | |
| 646 case SSL_ERROR_ZERO_RETURN: | |
| 647 LOG(LS_VERBOSE) << " -- remote side closed"; | |
| 648 Close(); | |
| 649 return SR_EOS; | |
| 650 break; | |
| 651 default: | |
| 652 LOG(LS_VERBOSE) << " -- error " << code; | |
| 653 Error("SSL_read", (ssl_error ? ssl_error : -1), 0, false); | |
| 654 if (error) | |
| 655 *error = ssl_error_code_; | |
| 656 return SR_ERROR; | |
| 657 } | |
| 658 // not reached | |
| 659 } | |
| 660 | |
| 661 void OpenSSLStreamAdapter::FlushInput(unsigned int left) { | |
| 662 unsigned char buf[2048]; | |
| 663 | |
| 664 while (left) { | |
| 665 // This should always succeed | |
| 666 int toread = (sizeof(buf) < left) ? sizeof(buf) : left; | |
| 667 int code = SSL_read(ssl_, buf, toread); | |
| 668 | |
| 669 int ssl_error = SSL_get_error(ssl_, code); | |
| 670 RTC_DCHECK(ssl_error == SSL_ERROR_NONE); | |
| 671 | |
| 672 if (ssl_error != SSL_ERROR_NONE) { | |
| 673 LOG(LS_VERBOSE) << " -- error " << code; | |
| 674 Error("SSL_read", (ssl_error ? ssl_error : -1), 0, false); | |
| 675 return; | |
| 676 } | |
| 677 | |
| 678 LOG(LS_VERBOSE) << " -- flushed " << code << " bytes"; | |
| 679 left -= code; | |
| 680 } | |
| 681 } | |
| 682 | |
| 683 void OpenSSLStreamAdapter::Close() { | |
| 684 Cleanup(0); | |
| 685 RTC_DCHECK(state_ == SSL_CLOSED || state_ == SSL_ERROR); | |
| 686 // When we're closed at SSL layer, also close the stream level which | |
| 687 // performs necessary clean up. Otherwise, a new incoming packet after | |
| 688 // this could overflow the stream buffer. | |
| 689 StreamAdapterInterface::Close(); | |
| 690 } | |
| 691 | |
| 692 StreamState OpenSSLStreamAdapter::GetState() const { | |
| 693 switch (state_) { | |
| 694 case SSL_WAIT: | |
| 695 case SSL_CONNECTING: | |
| 696 return SS_OPENING; | |
| 697 case SSL_CONNECTED: | |
| 698 if (waiting_to_verify_peer_certificate()) { | |
| 699 return SS_OPENING; | |
| 700 } | |
| 701 return SS_OPEN; | |
| 702 default: | |
| 703 return SS_CLOSED; | |
| 704 }; | |
| 705 // not reached | |
| 706 } | |
| 707 | |
| 708 void OpenSSLStreamAdapter::OnEvent(StreamInterface* stream, int events, | |
| 709 int err) { | |
| 710 int events_to_signal = 0; | |
| 711 int signal_error = 0; | |
| 712 RTC_DCHECK(stream == this->stream()); | |
| 713 if ((events & SE_OPEN)) { | |
| 714 LOG(LS_VERBOSE) << "OpenSSLStreamAdapter::OnEvent SE_OPEN"; | |
| 715 if (state_ != SSL_WAIT) { | |
| 716 RTC_DCHECK(state_ == SSL_NONE); | |
| 717 events_to_signal |= SE_OPEN; | |
| 718 } else { | |
| 719 state_ = SSL_CONNECTING; | |
| 720 if (int err = BeginSSL()) { | |
| 721 Error("BeginSSL", err, 0, true); | |
| 722 return; | |
| 723 } | |
| 724 } | |
| 725 } | |
| 726 if ((events & (SE_READ|SE_WRITE))) { | |
| 727 LOG(LS_VERBOSE) << "OpenSSLStreamAdapter::OnEvent" | |
| 728 << ((events & SE_READ) ? " SE_READ" : "") | |
| 729 << ((events & SE_WRITE) ? " SE_WRITE" : ""); | |
| 730 if (state_ == SSL_NONE) { | |
| 731 events_to_signal |= events & (SE_READ|SE_WRITE); | |
| 732 } else if (state_ == SSL_CONNECTING) { | |
| 733 if (int err = ContinueSSL()) { | |
| 734 Error("ContinueSSL", err, 0, true); | |
| 735 return; | |
| 736 } | |
| 737 } else if (state_ == SSL_CONNECTED) { | |
| 738 if (((events & SE_READ) && ssl_write_needs_read_) || | |
| 739 (events & SE_WRITE)) { | |
| 740 LOG(LS_VERBOSE) << " -- onStreamWriteable"; | |
| 741 events_to_signal |= SE_WRITE; | |
| 742 } | |
| 743 if (((events & SE_WRITE) && ssl_read_needs_write_) || | |
| 744 (events & SE_READ)) { | |
| 745 LOG(LS_VERBOSE) << " -- onStreamReadable"; | |
| 746 events_to_signal |= SE_READ; | |
| 747 } | |
| 748 } | |
| 749 } | |
| 750 if ((events & SE_CLOSE)) { | |
| 751 LOG(LS_VERBOSE) << "OpenSSLStreamAdapter::OnEvent(SE_CLOSE, " << err << ")"; | |
| 752 Cleanup(0); | |
| 753 events_to_signal |= SE_CLOSE; | |
| 754 // SE_CLOSE is the only event that uses the final parameter to OnEvent(). | |
| 755 RTC_DCHECK(signal_error == 0); | |
| 756 signal_error = err; | |
| 757 } | |
| 758 if (events_to_signal) | |
| 759 StreamAdapterInterface::OnEvent(stream, events_to_signal, signal_error); | |
| 760 } | |
| 761 | |
| 762 int OpenSSLStreamAdapter::BeginSSL() { | |
| 763 RTC_DCHECK(state_ == SSL_CONNECTING); | |
| 764 // The underlying stream has opened. | |
| 765 LOG(LS_INFO) << "BeginSSL with peer."; | |
| 766 | |
| 767 BIO* bio = nullptr; | |
| 768 | |
| 769 // First set up the context. | |
| 770 RTC_DCHECK(ssl_ctx_ == nullptr); | |
| 771 ssl_ctx_ = SetupSSLContext(); | |
| 772 if (!ssl_ctx_) | |
| 773 return -1; | |
| 774 | |
| 775 bio = BIO_new_stream(static_cast<StreamInterface*>(stream())); | |
| 776 if (!bio) | |
| 777 return -1; | |
| 778 | |
| 779 ssl_ = SSL_new(ssl_ctx_); | |
| 780 if (!ssl_) { | |
| 781 BIO_free(bio); | |
| 782 return -1; | |
| 783 } | |
| 784 | |
| 785 SSL_set_app_data(ssl_, this); | |
| 786 | |
| 787 SSL_set_bio(ssl_, bio, bio); // the SSL object owns the bio now. | |
| 788 if (ssl_mode_ == SSL_MODE_DTLS) { | |
| 789 #ifdef OPENSSL_IS_BORINGSSL | |
| 790 DTLSv1_set_initial_timeout_duration(ssl_, dtls_handshake_timeout_ms_); | |
| 791 #else | |
| 792 // Enable read-ahead for DTLS so whole packets are read from internal BIO | |
| 793 // before parsing. This is done internally by BoringSSL for DTLS. | |
| 794 SSL_set_read_ahead(ssl_, 1); | |
| 795 #endif | |
| 796 } | |
| 797 | |
| 798 SSL_set_mode(ssl_, SSL_MODE_ENABLE_PARTIAL_WRITE | | |
| 799 SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); | |
| 800 | |
| 801 #if !defined(OPENSSL_IS_BORINGSSL) | |
| 802 // Specify an ECDH group for ECDHE ciphers, otherwise OpenSSL cannot | |
| 803 // negotiate them when acting as the server. Use NIST's P-256 which is | |
| 804 // commonly supported. BoringSSL doesn't need explicit configuration and has | |
| 805 // a reasonable default set. | |
| 806 EC_KEY* ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1); | |
| 807 if (ecdh == nullptr) | |
| 808 return -1; | |
| 809 SSL_set_options(ssl_, SSL_OP_SINGLE_ECDH_USE); | |
| 810 SSL_set_tmp_ecdh(ssl_, ecdh); | |
| 811 EC_KEY_free(ecdh); | |
| 812 #endif | |
| 813 | |
| 814 // Do the connect | |
| 815 return ContinueSSL(); | |
| 816 } | |
| 817 | |
| 818 int OpenSSLStreamAdapter::ContinueSSL() { | |
| 819 LOG(LS_VERBOSE) << "ContinueSSL"; | |
| 820 RTC_DCHECK(state_ == SSL_CONNECTING); | |
| 821 | |
| 822 // Clear the DTLS timer | |
| 823 Thread::Current()->Clear(this, MSG_TIMEOUT); | |
| 824 | |
| 825 int code = (role_ == SSL_CLIENT) ? SSL_connect(ssl_) : SSL_accept(ssl_); | |
| 826 int ssl_error; | |
| 827 switch (ssl_error = SSL_get_error(ssl_, code)) { | |
| 828 case SSL_ERROR_NONE: | |
| 829 LOG(LS_VERBOSE) << " -- success"; | |
| 830 // By this point, OpenSSL should have given us a certificate, or errored | |
| 831 // out if one was missing. | |
| 832 RTC_DCHECK(peer_certificate_ || !client_auth_enabled()); | |
| 833 | |
| 834 state_ = SSL_CONNECTED; | |
| 835 if (!waiting_to_verify_peer_certificate()) { | |
| 836 // We have everything we need to start the connection, so signal | |
| 837 // SE_OPEN. If we need a client certificate fingerprint and don't have | |
| 838 // it yet, we'll instead signal SE_OPEN in SetPeerCertificateDigest. | |
| 839 // | |
| 840 // TODO(deadbeef): Post this event asynchronously to unwind the stack. | |
| 841 // The caller of ContinueSSL may be the same object listening for these | |
| 842 // events and may not be prepared for reentrancy. | |
| 843 // PostEvent(SE_OPEN | SE_READ | SE_WRITE, 0); | |
| 844 StreamAdapterInterface::OnEvent(stream(), SE_OPEN | SE_READ | SE_WRITE, | |
| 845 0); | |
| 846 } | |
| 847 break; | |
| 848 | |
| 849 case SSL_ERROR_WANT_READ: { | |
| 850 LOG(LS_VERBOSE) << " -- error want read"; | |
| 851 struct timeval timeout; | |
| 852 if (DTLSv1_get_timeout(ssl_, &timeout)) { | |
| 853 int delay = timeout.tv_sec * 1000 + timeout.tv_usec/1000; | |
| 854 | |
| 855 Thread::Current()->PostDelayed(RTC_FROM_HERE, delay, this, | |
| 856 MSG_TIMEOUT, 0); | |
| 857 } | |
| 858 } | |
| 859 break; | |
| 860 | |
| 861 case SSL_ERROR_WANT_WRITE: | |
| 862 LOG(LS_VERBOSE) << " -- error want write"; | |
| 863 break; | |
| 864 | |
| 865 case SSL_ERROR_ZERO_RETURN: | |
| 866 default: | |
| 867 LOG(LS_VERBOSE) << " -- error " << code; | |
| 868 SSLHandshakeError ssl_handshake_err = SSLHandshakeError::UNKNOWN; | |
| 869 int err_code = ERR_peek_last_error(); | |
| 870 if (err_code != 0 && ERR_GET_REASON(err_code) == SSL_R_NO_SHARED_CIPHER) { | |
| 871 ssl_handshake_err = SSLHandshakeError::INCOMPATIBLE_CIPHERSUITE; | |
| 872 } | |
| 873 SignalSSLHandshakeError(ssl_handshake_err); | |
| 874 return (ssl_error != 0) ? ssl_error : -1; | |
| 875 } | |
| 876 | |
| 877 return 0; | |
| 878 } | |
| 879 | |
| 880 void OpenSSLStreamAdapter::Error(const char* context, | |
| 881 int err, | |
| 882 uint8_t alert, | |
| 883 bool signal) { | |
| 884 LOG(LS_WARNING) << "OpenSSLStreamAdapter::Error(" << context << ", " << err | |
| 885 << ", " << static_cast<int>(alert) << ")"; | |
| 886 state_ = SSL_ERROR; | |
| 887 ssl_error_code_ = err; | |
| 888 Cleanup(alert); | |
| 889 if (signal) | |
| 890 StreamAdapterInterface::OnEvent(stream(), SE_CLOSE, err); | |
| 891 } | |
| 892 | |
| 893 void OpenSSLStreamAdapter::Cleanup(uint8_t alert) { | |
| 894 LOG(LS_INFO) << "Cleanup"; | |
| 895 | |
| 896 if (state_ != SSL_ERROR) { | |
| 897 state_ = SSL_CLOSED; | |
| 898 ssl_error_code_ = 0; | |
| 899 } | |
| 900 | |
| 901 if (ssl_) { | |
| 902 int ret; | |
| 903 // SSL_send_fatal_alert is only available in BoringSSL. | |
| 904 #ifdef OPENSSL_IS_BORINGSSL | |
| 905 if (alert) { | |
| 906 ret = SSL_send_fatal_alert(ssl_, alert); | |
| 907 if (ret < 0) { | |
| 908 LOG(LS_WARNING) << "SSL_send_fatal_alert failed, error = " | |
| 909 << SSL_get_error(ssl_, ret); | |
| 910 } | |
| 911 } else { | |
| 912 #endif | |
| 913 ret = SSL_shutdown(ssl_); | |
| 914 if (ret < 0) { | |
| 915 LOG(LS_WARNING) << "SSL_shutdown failed, error = " | |
| 916 << SSL_get_error(ssl_, ret); | |
| 917 } | |
| 918 #ifdef OPENSSL_IS_BORINGSSL | |
| 919 } | |
| 920 #endif | |
| 921 SSL_free(ssl_); | |
| 922 ssl_ = nullptr; | |
| 923 } | |
| 924 if (ssl_ctx_) { | |
| 925 SSL_CTX_free(ssl_ctx_); | |
| 926 ssl_ctx_ = nullptr; | |
| 927 } | |
| 928 identity_.reset(); | |
| 929 peer_certificate_.reset(); | |
| 930 | |
| 931 // Clear the DTLS timer | |
| 932 Thread::Current()->Clear(this, MSG_TIMEOUT); | |
| 933 } | |
| 934 | |
| 935 | |
| 936 void OpenSSLStreamAdapter::OnMessage(Message* msg) { | |
| 937 // Process our own messages and then pass others to the superclass | |
| 938 if (MSG_TIMEOUT == msg->message_id) { | |
| 939 LOG(LS_INFO) << "DTLS timeout expired"; | |
| 940 DTLSv1_handle_timeout(ssl_); | |
| 941 ContinueSSL(); | |
| 942 } else { | |
| 943 StreamInterface::OnMessage(msg); | |
| 944 } | |
| 945 } | |
| 946 | |
| 947 SSL_CTX* OpenSSLStreamAdapter::SetupSSLContext() { | |
| 948 SSL_CTX* ctx = nullptr; | |
| 949 | |
| 950 #ifdef OPENSSL_IS_BORINGSSL | |
| 951 ctx = SSL_CTX_new(ssl_mode_ == SSL_MODE_DTLS ? | |
| 952 DTLS_method() : TLS_method()); | |
| 953 // Version limiting for BoringSSL will be done below. | |
| 954 #else | |
| 955 const SSL_METHOD* method; | |
| 956 switch (ssl_max_version_) { | |
| 957 case SSL_PROTOCOL_TLS_10: | |
| 958 case SSL_PROTOCOL_TLS_11: | |
| 959 // OpenSSL doesn't support setting min/max versions, so we always use | |
| 960 // (D)TLS 1.0 if a max. version below the max. available is requested. | |
| 961 if (ssl_mode_ == SSL_MODE_DTLS) { | |
| 962 if (role_ == SSL_CLIENT) { | |
| 963 method = DTLSv1_client_method(); | |
| 964 } else { | |
| 965 method = DTLSv1_server_method(); | |
| 966 } | |
| 967 } else { | |
| 968 if (role_ == SSL_CLIENT) { | |
| 969 method = TLSv1_client_method(); | |
| 970 } else { | |
| 971 method = TLSv1_server_method(); | |
| 972 } | |
| 973 } | |
| 974 break; | |
| 975 case SSL_PROTOCOL_TLS_12: | |
| 976 default: | |
| 977 if (ssl_mode_ == SSL_MODE_DTLS) { | |
| 978 #if (OPENSSL_VERSION_NUMBER >= 0x10002000L) | |
| 979 // DTLS 1.2 only available starting from OpenSSL 1.0.2 | |
| 980 if (role_ == SSL_CLIENT) { | |
| 981 method = DTLS_client_method(); | |
| 982 } else { | |
| 983 method = DTLS_server_method(); | |
| 984 } | |
| 985 #else | |
| 986 if (role_ == SSL_CLIENT) { | |
| 987 method = DTLSv1_client_method(); | |
| 988 } else { | |
| 989 method = DTLSv1_server_method(); | |
| 990 } | |
| 991 #endif | |
| 992 } else { | |
| 993 #if (OPENSSL_VERSION_NUMBER >= 0x10100000L) | |
| 994 // New API only available starting from OpenSSL 1.1.0 | |
| 995 if (role_ == SSL_CLIENT) { | |
| 996 method = TLS_client_method(); | |
| 997 } else { | |
| 998 method = TLS_server_method(); | |
| 999 } | |
| 1000 #else | |
| 1001 if (role_ == SSL_CLIENT) { | |
| 1002 method = SSLv23_client_method(); | |
| 1003 } else { | |
| 1004 method = SSLv23_server_method(); | |
| 1005 } | |
| 1006 #endif | |
| 1007 } | |
| 1008 break; | |
| 1009 } | |
| 1010 ctx = SSL_CTX_new(method); | |
| 1011 #endif // OPENSSL_IS_BORINGSSL | |
| 1012 | |
| 1013 if (ctx == nullptr) | |
| 1014 return nullptr; | |
| 1015 | |
| 1016 #ifdef OPENSSL_IS_BORINGSSL | |
| 1017 SSL_CTX_set_min_proto_version(ctx, ssl_mode_ == SSL_MODE_DTLS ? | |
| 1018 DTLS1_VERSION : TLS1_VERSION); | |
| 1019 switch (ssl_max_version_) { | |
| 1020 case SSL_PROTOCOL_TLS_10: | |
| 1021 SSL_CTX_set_max_proto_version(ctx, ssl_mode_ == SSL_MODE_DTLS ? | |
| 1022 DTLS1_VERSION : TLS1_VERSION); | |
| 1023 break; | |
| 1024 case SSL_PROTOCOL_TLS_11: | |
| 1025 SSL_CTX_set_max_proto_version(ctx, ssl_mode_ == SSL_MODE_DTLS ? | |
| 1026 DTLS1_VERSION : TLS1_1_VERSION); | |
| 1027 break; | |
| 1028 case SSL_PROTOCOL_TLS_12: | |
| 1029 default: | |
| 1030 SSL_CTX_set_max_proto_version(ctx, ssl_mode_ == SSL_MODE_DTLS ? | |
| 1031 DTLS1_2_VERSION : TLS1_2_VERSION); | |
| 1032 break; | |
| 1033 } | |
| 1034 if (g_use_time_callback_for_testing) { | |
| 1035 SSL_CTX_set_current_time_cb(ctx, &TimeCallbackForTesting); | |
| 1036 } | |
| 1037 #endif | |
| 1038 | |
| 1039 if (identity_ && !identity_->ConfigureIdentity(ctx)) { | |
| 1040 SSL_CTX_free(ctx); | |
| 1041 return nullptr; | |
| 1042 } | |
| 1043 | |
| 1044 #if !defined(NDEBUG) | |
| 1045 SSL_CTX_set_info_callback(ctx, OpenSSLAdapter::SSLInfoCallback); | |
| 1046 #endif | |
| 1047 | |
| 1048 int mode = SSL_VERIFY_PEER; | |
| 1049 if (client_auth_enabled()) { | |
| 1050 // Require a certificate from the client. | |
| 1051 // Note: Normally this is always true in production, but it may be disabled | |
| 1052 // for testing purposes (e.g. SSLAdapter unit tests). | |
| 1053 mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT; | |
| 1054 } | |
| 1055 | |
| 1056 SSL_CTX_set_verify(ctx, mode, SSLVerifyCallback); | |
| 1057 SSL_CTX_set_verify_depth(ctx, 4); | |
| 1058 // Select list of available ciphers. Note that !SHA256 and !SHA384 only | |
| 1059 // remove HMAC-SHA256 and HMAC-SHA384 cipher suites, not GCM cipher suites | |
| 1060 // with SHA256 or SHA384 as the handshake hash. | |
| 1061 // This matches the list of SSLClientSocketOpenSSL in Chromium. | |
| 1062 SSL_CTX_set_cipher_list( | |
| 1063 ctx, "DEFAULT:!NULL:!aNULL:!SHA256:!SHA384:!aECDH:!AESGCM+AES256:!aPSK"); | |
| 1064 | |
| 1065 if (!srtp_ciphers_.empty()) { | |
| 1066 if (SSL_CTX_set_tlsext_use_srtp(ctx, srtp_ciphers_.c_str())) { | |
| 1067 SSL_CTX_free(ctx); | |
| 1068 return nullptr; | |
| 1069 } | |
| 1070 } | |
| 1071 | |
| 1072 return ctx; | |
| 1073 } | |
| 1074 | |
| 1075 bool OpenSSLStreamAdapter::VerifyPeerCertificate() { | |
| 1076 if (!has_peer_certificate_digest() || !peer_certificate_) { | |
| 1077 LOG(LS_WARNING) << "Missing digest or peer certificate."; | |
| 1078 return false; | |
| 1079 } | |
| 1080 | |
| 1081 unsigned char digest[EVP_MAX_MD_SIZE]; | |
| 1082 size_t digest_length; | |
| 1083 if (!OpenSSLCertificate::ComputeDigest( | |
| 1084 peer_certificate_->x509(), peer_certificate_digest_algorithm_, digest, | |
| 1085 sizeof(digest), &digest_length)) { | |
| 1086 LOG(LS_WARNING) << "Failed to compute peer cert digest."; | |
| 1087 return false; | |
| 1088 } | |
| 1089 | |
| 1090 Buffer computed_digest(digest, digest_length); | |
| 1091 if (computed_digest != peer_certificate_digest_value_) { | |
| 1092 LOG(LS_WARNING) << "Rejected peer certificate due to mismatched digest."; | |
| 1093 return false; | |
| 1094 } | |
| 1095 // Ignore any verification error if the digest matches, since there is no | |
| 1096 // value in checking the validity of a self-signed cert issued by untrusted | |
| 1097 // sources. | |
| 1098 LOG(LS_INFO) << "Accepted peer certificate."; | |
| 1099 peer_certificate_verified_ = true; | |
| 1100 return true; | |
| 1101 } | |
| 1102 | |
| 1103 int OpenSSLStreamAdapter::SSLVerifyCallback(int ok, X509_STORE_CTX* store) { | |
| 1104 // Get our SSL structure from the store | |
| 1105 SSL* ssl = reinterpret_cast<SSL*>( | |
| 1106 X509_STORE_CTX_get_ex_data(store, SSL_get_ex_data_X509_STORE_CTX_idx())); | |
| 1107 X509* cert = X509_STORE_CTX_get_current_cert(store); | |
| 1108 int depth = X509_STORE_CTX_get_error_depth(store); | |
| 1109 | |
| 1110 // For now we ignore the parent certificates and verify the leaf against | |
| 1111 // the digest. | |
| 1112 // | |
| 1113 // TODO(jiayl): Verify the chain is a proper chain and report the chain to | |
| 1114 // |stream->peer_certificate_|. | |
| 1115 if (depth > 0) { | |
| 1116 LOG(LS_INFO) << "Ignored chained certificate at depth " << depth; | |
| 1117 return 1; | |
| 1118 } | |
| 1119 | |
| 1120 OpenSSLStreamAdapter* stream = | |
| 1121 reinterpret_cast<OpenSSLStreamAdapter*>(SSL_get_app_data(ssl)); | |
| 1122 | |
| 1123 // Record the peer's certificate. | |
| 1124 stream->peer_certificate_.reset(new OpenSSLCertificate(cert)); | |
| 1125 | |
| 1126 // If the peer certificate digest isn't known yet, we'll wait to verify | |
| 1127 // until it's known, and for now just return a success status. | |
| 1128 if (stream->peer_certificate_digest_algorithm_.empty()) { | |
| 1129 LOG(LS_INFO) << "Waiting to verify certificate until digest is known."; | |
| 1130 return 1; | |
| 1131 } | |
| 1132 | |
| 1133 return stream->VerifyPeerCertificate(); | |
| 1134 } | |
| 1135 | |
| 1136 bool OpenSSLStreamAdapter::IsBoringSsl() { | |
| 1137 #ifdef OPENSSL_IS_BORINGSSL | |
| 1138 return true; | |
| 1139 #else | |
| 1140 return false; | |
| 1141 #endif | |
| 1142 } | |
| 1143 | |
| 1144 #define CDEF(X) \ | |
| 1145 { static_cast<uint16_t>(TLS1_CK_##X & 0xffff), "TLS_" #X } | |
| 1146 | |
| 1147 struct cipher_list { | |
| 1148 uint16_t cipher; | |
| 1149 const char* cipher_str; | |
| 1150 }; | |
| 1151 | |
| 1152 // TODO(torbjorng): Perhaps add more cipher suites to these lists. | |
| 1153 static const cipher_list OK_RSA_ciphers[] = { | |
| 1154 CDEF(ECDHE_RSA_WITH_AES_128_CBC_SHA), | |
| 1155 CDEF(ECDHE_RSA_WITH_AES_256_CBC_SHA), | |
| 1156 CDEF(ECDHE_RSA_WITH_AES_128_GCM_SHA256), | |
| 1157 #ifdef TLS1_CK_ECDHE_RSA_WITH_AES_256_GCM_SHA256 | |
| 1158 CDEF(ECDHE_RSA_WITH_AES_256_GCM_SHA256), | |
| 1159 #endif | |
| 1160 #ifdef TLS1_CK_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 | |
| 1161 CDEF(ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256), | |
| 1162 #endif | |
| 1163 }; | |
| 1164 | |
| 1165 static const cipher_list OK_ECDSA_ciphers[] = { | |
| 1166 CDEF(ECDHE_ECDSA_WITH_AES_128_CBC_SHA), | |
| 1167 CDEF(ECDHE_ECDSA_WITH_AES_256_CBC_SHA), | |
| 1168 CDEF(ECDHE_ECDSA_WITH_AES_128_GCM_SHA256), | |
| 1169 #ifdef TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA256 | |
| 1170 CDEF(ECDHE_ECDSA_WITH_AES_256_GCM_SHA256), | |
| 1171 #endif | |
| 1172 #ifdef TLS1_CK_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 | |
| 1173 CDEF(ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256), | |
| 1174 #endif | |
| 1175 }; | |
| 1176 #undef CDEF | |
| 1177 | |
| 1178 bool OpenSSLStreamAdapter::IsAcceptableCipher(int cipher, KeyType key_type) { | |
| 1179 if (key_type == KT_RSA) { | |
| 1180 for (const cipher_list& c : OK_RSA_ciphers) { | |
| 1181 if (cipher == c.cipher) | |
| 1182 return true; | |
| 1183 } | |
| 1184 } | |
| 1185 | |
| 1186 if (key_type == KT_ECDSA) { | |
| 1187 for (const cipher_list& c : OK_ECDSA_ciphers) { | |
| 1188 if (cipher == c.cipher) | |
| 1189 return true; | |
| 1190 } | |
| 1191 } | |
| 1192 | |
| 1193 return false; | |
| 1194 } | |
| 1195 | |
| 1196 bool OpenSSLStreamAdapter::IsAcceptableCipher(const std::string& cipher, | |
| 1197 KeyType key_type) { | |
| 1198 if (key_type == KT_RSA) { | |
| 1199 for (const cipher_list& c : OK_RSA_ciphers) { | |
| 1200 if (cipher == c.cipher_str) | |
| 1201 return true; | |
| 1202 } | |
| 1203 } | |
| 1204 | |
| 1205 if (key_type == KT_ECDSA) { | |
| 1206 for (const cipher_list& c : OK_ECDSA_ciphers) { | |
| 1207 if (cipher == c.cipher_str) | |
| 1208 return true; | |
| 1209 } | |
| 1210 } | |
| 1211 | |
| 1212 return false; | |
| 1213 } | |
| 1214 | |
| 1215 void OpenSSLStreamAdapter::enable_time_callback_for_testing() { | |
| 1216 g_use_time_callback_for_testing = true; | |
| 1217 } | |
| 1218 | |
| 1219 } // namespace rtc | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2877023002:
Move webrtc/{base => rtc_base} (Closed)
