Adrien Béraud | 612b55b | 2023-05-29 10:42:04 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004-2023 Savoir-faire Linux Inc. |
| 3 | * |
| 4 | * Author: Adrien Béraud <adrien.beraud@savoirfairelinux.com> |
| 5 | * Author: Vsevolod Ivanov <vsevolod.ivanov@savoirfairelinux.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 3 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | */ |
| 21 | |
| 22 | #include "certstore.h" |
| 23 | #include "security_const.h" |
| 24 | |
| 25 | #include "fileutils.h" |
| 26 | |
| 27 | #include <opendht/thread_pool.h> |
| 28 | #include <opendht/logger.h> |
| 29 | |
| 30 | #include <gnutls/ocsp.h> |
| 31 | |
| 32 | #include <thread> |
| 33 | #include <sstream> |
| 34 | #include <fmt/format.h> |
| 35 | |
| 36 | namespace jami { |
| 37 | namespace tls { |
| 38 | |
| 39 | CertificateStore::CertificateStore(const std::string& path, std::shared_ptr<Logger> logger) |
| 40 | : logger_(std::move(logger)) |
| 41 | , certPath_(fmt::format("{}/certificates", path)) |
| 42 | , crlPath_(fmt::format("{}/crls", path)) |
| 43 | , ocspPath_(fmt::format("{}/oscp", path)) |
| 44 | { |
| 45 | fileutils::check_dir(certPath_.c_str()); |
| 46 | fileutils::check_dir(crlPath_.c_str()); |
| 47 | fileutils::check_dir(ocspPath_.c_str()); |
| 48 | loadLocalCertificates(); |
| 49 | } |
| 50 | |
| 51 | unsigned |
| 52 | CertificateStore::loadLocalCertificates() |
| 53 | { |
| 54 | std::lock_guard<std::mutex> l(lock_); |
| 55 | |
| 56 | auto dir_content = fileutils::readDirectory(certPath_); |
| 57 | unsigned n = 0; |
| 58 | for (const auto& f : dir_content) { |
| 59 | try { |
| 60 | auto crt = std::make_shared<crypto::Certificate>( |
| 61 | fileutils::loadFile(certPath_ + DIR_SEPARATOR_CH + f)); |
| 62 | auto id = crt->getId().toString(); |
| 63 | auto longId = crt->getLongId().toString(); |
| 64 | if (id != f && longId != f) |
| 65 | throw std::logic_error("Certificate id mismatch"); |
| 66 | while (crt) { |
| 67 | id = crt->getId().toString(); |
| 68 | longId = crt->getLongId().toString(); |
| 69 | certs_.emplace(std::move(id), crt); |
| 70 | certs_.emplace(std::move(longId), crt); |
| 71 | loadRevocations(*crt); |
| 72 | crt = crt->issuer; |
| 73 | ++n; |
| 74 | } |
| 75 | } catch (const std::exception& e) { |
| 76 | if (logger_) |
| 77 | logger_->warn("Remove cert. {}", e.what()); |
| 78 | remove(fmt::format("{}/{}", certPath_, f).c_str()); |
| 79 | } |
| 80 | } |
| 81 | if (logger_) |
| 82 | logger_->debug("CertificateStore: loaded {} local certificates.", n); |
| 83 | return n; |
| 84 | } |
| 85 | |
| 86 | void |
| 87 | CertificateStore::loadRevocations(crypto::Certificate& crt) const |
| 88 | { |
| 89 | auto dir = fmt::format("{:s}/{:s}", crlPath_, crt.getId().toString()); |
| 90 | for (const auto& crl : fileutils::readDirectory(dir)) { |
| 91 | try { |
| 92 | crt.addRevocationList(std::make_shared<crypto::RevocationList>( |
| 93 | fileutils::loadFile(fmt::format("{}/{}", dir, crl)))); |
| 94 | } catch (const std::exception& e) { |
| 95 | if (logger_) |
| 96 | logger_->warn("Can't load revocation list: %s", e.what()); |
| 97 | } |
| 98 | } |
| 99 | auto ocsp_dir = ocspPath_ + DIR_SEPARATOR_CH + crt.getId().toString(); |
| 100 | for (const auto& ocsp : fileutils::readDirectory(ocsp_dir)) { |
| 101 | try { |
| 102 | auto ocsp_filepath = fmt::format("{}/{}", ocsp_dir, ocsp); |
| 103 | if (logger_) logger_->debug("Found {:s}", ocsp_filepath); |
| 104 | auto serial = crt.getSerialNumber(); |
| 105 | if (dht::toHex(serial.data(), serial.size()) != ocsp) |
| 106 | continue; |
| 107 | // Save the response |
| 108 | auto ocspBlob = fileutils::loadFile(ocsp_filepath); |
| 109 | crt.ocspResponse = std::make_shared<dht::crypto::OcspResponse>(ocspBlob.data(), |
| 110 | ocspBlob.size()); |
| 111 | unsigned int status = crt.ocspResponse->getCertificateStatus(); |
| 112 | if (status == GNUTLS_OCSP_CERT_GOOD) { |
| 113 | if (logger_) logger_->debug("Certificate {:s} has good OCSP status", crt.getId()); |
| 114 | } else if (status == GNUTLS_OCSP_CERT_REVOKED) { |
| 115 | if (logger_) logger_->error("Certificate {:s} has revoked OCSP status", crt.getId()); |
| 116 | } else if (status == GNUTLS_OCSP_CERT_UNKNOWN) { |
| 117 | if (logger_) logger_->error("Certificate {:s} has unknown OCSP status", crt.getId()); |
| 118 | } else { |
| 119 | if (logger_) logger_->error("Certificate {:s} has invalid OCSP status", crt.getId()); |
| 120 | } |
| 121 | } catch (const std::exception& e) { |
| 122 | if (logger_) |
| 123 | logger_->warn("Can't load OCSP revocation status: {:s}", e.what()); |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | std::vector<std::string> |
| 129 | CertificateStore::getPinnedCertificates() const |
| 130 | { |
| 131 | std::lock_guard<std::mutex> l(lock_); |
| 132 | |
| 133 | std::vector<std::string> certIds; |
| 134 | certIds.reserve(certs_.size()); |
| 135 | for (const auto& crt : certs_) |
| 136 | certIds.emplace_back(crt.first); |
| 137 | return certIds; |
| 138 | } |
| 139 | |
| 140 | std::shared_ptr<crypto::Certificate> |
| 141 | CertificateStore::getCertificate(const std::string& k) |
| 142 | { |
| 143 | auto getCertificate_ = [this](const std::string& k) -> std::shared_ptr<crypto::Certificate> { |
| 144 | auto cit = certs_.find(k); |
| 145 | if (cit == certs_.cend()) |
| 146 | return {}; |
| 147 | return cit->second; |
| 148 | }; |
| 149 | std::unique_lock<std::mutex> l(lock_); |
| 150 | auto crt = getCertificate_(k); |
| 151 | // Check if certificate is complete |
| 152 | // If the certificate has been splitted, reconstruct it |
| 153 | auto top_issuer = crt; |
| 154 | while (top_issuer && top_issuer->getUID() != top_issuer->getIssuerUID()) { |
| 155 | if (top_issuer->issuer) { |
| 156 | top_issuer = top_issuer->issuer; |
| 157 | } else if (auto cert = getCertificate_(top_issuer->getIssuerUID())) { |
| 158 | top_issuer->issuer = cert; |
| 159 | top_issuer = cert; |
| 160 | } else { |
| 161 | // In this case, a certificate was not found |
| 162 | if (logger_) |
| 163 | logger_->warn("Incomplete certificate detected {:s}", k); |
| 164 | break; |
| 165 | } |
| 166 | } |
| 167 | return crt; |
| 168 | } |
| 169 | |
| 170 | std::shared_ptr<crypto::Certificate> |
| 171 | CertificateStore::getCertificateLegacy(const std::string& dataDir, const std::string& k) |
| 172 | { |
| 173 | auto oldPath = fmt::format("{}/certificates/{}", dataDir, k); |
| 174 | if (fileutils::isFile(oldPath)) { |
| 175 | auto crt = std::make_shared<crypto::Certificate>(oldPath); |
| 176 | pinCertificate(crt, true); |
| 177 | return crt; |
| 178 | } |
| 179 | return {}; |
| 180 | } |
| 181 | |
| 182 | std::shared_ptr<crypto::Certificate> |
| 183 | CertificateStore::findCertificateByName(const std::string& name, crypto::NameType type) const |
| 184 | { |
| 185 | std::unique_lock<std::mutex> l(lock_); |
| 186 | for (auto& i : certs_) { |
| 187 | if (i.second->getName() == name) |
| 188 | return i.second; |
| 189 | if (type != crypto::NameType::UNKNOWN) { |
| 190 | for (const auto& alt : i.second->getAltNames()) |
| 191 | if (alt.first == type and alt.second == name) |
| 192 | return i.second; |
| 193 | } |
| 194 | } |
| 195 | return {}; |
| 196 | } |
| 197 | |
| 198 | std::shared_ptr<crypto::Certificate> |
| 199 | CertificateStore::findCertificateByUID(const std::string& uid) const |
| 200 | { |
| 201 | std::unique_lock<std::mutex> l(lock_); |
| 202 | for (auto& i : certs_) { |
| 203 | if (i.second->getUID() == uid) |
| 204 | return i.second; |
| 205 | } |
| 206 | return {}; |
| 207 | } |
| 208 | |
| 209 | std::shared_ptr<crypto::Certificate> |
| 210 | CertificateStore::findIssuer(const std::shared_ptr<crypto::Certificate>& crt) const |
| 211 | { |
| 212 | std::shared_ptr<crypto::Certificate> ret {}; |
| 213 | auto n = crt->getIssuerUID(); |
| 214 | if (not n.empty()) { |
| 215 | if (crt->issuer and crt->issuer->getUID() == n) |
| 216 | ret = crt->issuer; |
| 217 | else |
| 218 | ret = findCertificateByUID(n); |
| 219 | } |
| 220 | if (not ret) { |
| 221 | n = crt->getIssuerName(); |
| 222 | if (not n.empty()) |
| 223 | ret = findCertificateByName(n); |
| 224 | } |
| 225 | if (not ret) |
| 226 | return ret; |
| 227 | unsigned verify_out = 0; |
| 228 | int err = gnutls_x509_crt_verify(crt->cert, &ret->cert, 1, 0, &verify_out); |
| 229 | if (err != GNUTLS_E_SUCCESS) { |
| 230 | if (logger_) |
| 231 | logger_->warn("gnutls_x509_crt_verify failed: {:s}", gnutls_strerror(err)); |
| 232 | return {}; |
| 233 | } |
| 234 | if (verify_out & GNUTLS_CERT_INVALID) |
| 235 | return {}; |
| 236 | return ret; |
| 237 | } |
| 238 | |
| 239 | static std::vector<crypto::Certificate> |
| 240 | readCertificates(const std::string& path, const std::string& crl_path) |
| 241 | { |
| 242 | std::vector<crypto::Certificate> ret; |
| 243 | if (fileutils::isDirectory(path)) { |
| 244 | auto files = fileutils::readDirectory(path); |
| 245 | for (const auto& file : files) { |
| 246 | auto certs = readCertificates(fmt::format("{}/{}", path, file), crl_path); |
| 247 | ret.insert(std::end(ret), |
| 248 | std::make_move_iterator(std::begin(certs)), |
| 249 | std::make_move_iterator(std::end(certs))); |
| 250 | } |
| 251 | } else { |
| 252 | try { |
| 253 | auto data = fileutils::loadFile(path); |
| 254 | const gnutls_datum_t dt {data.data(), (unsigned) data.size()}; |
| 255 | gnutls_x509_crt_t* certs {nullptr}; |
| 256 | unsigned cert_num {0}; |
| 257 | gnutls_x509_crt_list_import2(&certs, &cert_num, &dt, GNUTLS_X509_FMT_PEM, 0); |
| 258 | for (unsigned i = 0; i < cert_num; i++) |
| 259 | ret.emplace_back(certs[i]); |
| 260 | gnutls_free(certs); |
| 261 | } catch (const std::exception& e) { |
| 262 | }; |
| 263 | } |
| 264 | return ret; |
| 265 | } |
| 266 | |
| 267 | void |
| 268 | CertificateStore::pinCertificatePath(const std::string& path, |
| 269 | std::function<void(const std::vector<std::string>&)> cb) |
| 270 | { |
| 271 | dht::ThreadPool::computation().run([&, path, cb]() { |
| 272 | auto certs = readCertificates(path, crlPath_); |
| 273 | std::vector<std::string> ids; |
| 274 | std::vector<std::weak_ptr<crypto::Certificate>> scerts; |
| 275 | ids.reserve(certs.size()); |
| 276 | scerts.reserve(certs.size()); |
| 277 | { |
| 278 | std::lock_guard<std::mutex> l(lock_); |
| 279 | |
| 280 | for (auto& cert : certs) { |
| 281 | auto shared = std::make_shared<crypto::Certificate>(std::move(cert)); |
| 282 | scerts.emplace_back(shared); |
| 283 | auto e = certs_.emplace(shared->getId().toString(), shared); |
| 284 | ids.emplace_back(e.first->first); |
| 285 | e = certs_.emplace(shared->getLongId().toString(), shared); |
| 286 | ids.emplace_back(e.first->first); |
| 287 | } |
| 288 | paths_.emplace(path, std::move(scerts)); |
| 289 | } |
| 290 | if (logger_) logger_->d("CertificateStore: loaded %zu certificates from %s.", certs.size(), path.c_str()); |
| 291 | if (cb) |
| 292 | cb(ids); |
| 293 | //emitSignal<libjami::ConfigurationSignal::CertificatePathPinned>(path, ids); |
| 294 | }); |
| 295 | } |
| 296 | |
| 297 | unsigned |
| 298 | CertificateStore::unpinCertificatePath(const std::string& path) |
| 299 | { |
| 300 | std::lock_guard<std::mutex> l(lock_); |
| 301 | |
| 302 | auto certs = paths_.find(path); |
| 303 | if (certs == std::end(paths_)) |
| 304 | return 0; |
| 305 | unsigned n = 0; |
| 306 | for (const auto& wcert : certs->second) { |
| 307 | if (auto cert = wcert.lock()) { |
| 308 | certs_.erase(cert->getId().toString()); |
| 309 | ++n; |
| 310 | } |
| 311 | } |
| 312 | paths_.erase(certs); |
| 313 | return n; |
| 314 | } |
| 315 | |
| 316 | std::vector<std::string> |
| 317 | CertificateStore::pinCertificate(const std::vector<uint8_t>& cert, bool local) noexcept |
| 318 | { |
| 319 | try { |
| 320 | return pinCertificate(crypto::Certificate(cert), local); |
| 321 | } catch (const std::exception& e) { |
| 322 | } |
| 323 | return {}; |
| 324 | } |
| 325 | |
| 326 | std::vector<std::string> |
| 327 | CertificateStore::pinCertificate(crypto::Certificate&& cert, bool local) |
| 328 | { |
| 329 | return pinCertificate(std::make_shared<crypto::Certificate>(std::move(cert)), local); |
| 330 | } |
| 331 | |
| 332 | std::vector<std::string> |
| 333 | CertificateStore::pinCertificate(const std::shared_ptr<crypto::Certificate>& cert, bool local) |
| 334 | { |
| 335 | bool sig {false}; |
| 336 | std::vector<std::string> ids {}; |
| 337 | { |
| 338 | auto c = cert; |
| 339 | std::lock_guard<std::mutex> l(lock_); |
| 340 | while (c) { |
| 341 | bool inserted; |
| 342 | auto id = c->getId().toString(); |
| 343 | auto longId = c->getLongId().toString(); |
| 344 | decltype(certs_)::iterator it; |
| 345 | std::tie(it, inserted) = certs_.emplace(id, c); |
| 346 | if (not inserted) |
| 347 | it->second = c; |
| 348 | std::tie(it, inserted) = certs_.emplace(longId, c); |
| 349 | if (not inserted) |
| 350 | it->second = c; |
| 351 | if (local) { |
| 352 | for (const auto& crl : c->getRevocationLists()) |
| 353 | pinRevocationList(id, *crl); |
| 354 | } |
| 355 | ids.emplace_back(longId); |
| 356 | ids.emplace_back(id); |
| 357 | c = c->issuer; |
| 358 | sig |= inserted; |
| 359 | } |
| 360 | if (local) { |
| 361 | if (sig) |
| 362 | fileutils::saveFile(certPath_ + DIR_SEPARATOR_CH + ids.front(), cert->getPacked()); |
| 363 | } |
| 364 | } |
| 365 | //for (const auto& id : ids) |
| 366 | // emitSignal<libjami::ConfigurationSignal::CertificatePinned>(id); |
| 367 | return ids; |
| 368 | } |
| 369 | |
| 370 | bool |
| 371 | CertificateStore::unpinCertificate(const std::string& id) |
| 372 | { |
| 373 | std::lock_guard<std::mutex> l(lock_); |
| 374 | |
| 375 | certs_.erase(id); |
| 376 | return remove((certPath_ + DIR_SEPARATOR_CH + id).c_str()) == 0; |
| 377 | } |
| 378 | |
| 379 | bool |
| 380 | CertificateStore::setTrustedCertificate(const std::string& id, TrustStatus status) |
| 381 | { |
| 382 | if (status == TrustStatus::TRUSTED) { |
| 383 | if (auto crt = getCertificate(id)) { |
| 384 | trustedCerts_.emplace_back(crt); |
| 385 | return true; |
| 386 | } |
| 387 | } else { |
| 388 | auto tc = std::find_if(trustedCerts_.begin(), |
| 389 | trustedCerts_.end(), |
| 390 | [&](const std::shared_ptr<crypto::Certificate>& crt) { |
| 391 | return crt->getId().toString() == id; |
| 392 | }); |
| 393 | if (tc != trustedCerts_.end()) { |
| 394 | trustedCerts_.erase(tc); |
| 395 | return true; |
| 396 | } |
| 397 | } |
| 398 | return false; |
| 399 | } |
| 400 | |
| 401 | std::vector<gnutls_x509_crt_t> |
| 402 | CertificateStore::getTrustedCertificates() const |
| 403 | { |
| 404 | std::vector<gnutls_x509_crt_t> crts; |
| 405 | crts.reserve(trustedCerts_.size()); |
| 406 | for (auto& crt : trustedCerts_) |
| 407 | crts.emplace_back(crt->getCopy()); |
| 408 | return crts; |
| 409 | } |
| 410 | |
| 411 | void |
| 412 | CertificateStore::pinRevocationList(const std::string& id, |
| 413 | const std::shared_ptr<dht::crypto::RevocationList>& crl) |
| 414 | { |
| 415 | try { |
| 416 | if (auto c = getCertificate(id)) |
| 417 | c->addRevocationList(crl); |
| 418 | pinRevocationList(id, *crl); |
| 419 | } catch (...) { |
| 420 | if (logger_) |
| 421 | logger_->warn("Can't add revocation list"); |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | void |
| 426 | CertificateStore::pinRevocationList(const std::string& id, const dht::crypto::RevocationList& crl) |
| 427 | { |
| 428 | fileutils::check_dir((crlPath_ + DIR_SEPARATOR_CH + id).c_str()); |
| 429 | fileutils::saveFile(crlPath_ + DIR_SEPARATOR_CH + id + DIR_SEPARATOR_CH |
| 430 | + dht::toHex(crl.getNumber()), |
| 431 | crl.getPacked()); |
| 432 | } |
| 433 | |
| 434 | void |
| 435 | CertificateStore::pinOcspResponse(const dht::crypto::Certificate& cert) |
| 436 | { |
| 437 | if (not cert.ocspResponse) |
| 438 | return; |
| 439 | try { |
| 440 | cert.ocspResponse->getCertificateStatus(); |
| 441 | } catch (dht::crypto::CryptoException& e) { |
| 442 | if (logger_) logger_->error("Failed to read certificate status of OCSP response: {:s}", e.what()); |
| 443 | return; |
| 444 | } |
| 445 | auto id = cert.getId().toString(); |
| 446 | auto serial = cert.getSerialNumber(); |
| 447 | auto serialhex = dht::toHex(serial); |
| 448 | auto dir = ocspPath_ + DIR_SEPARATOR_CH + id; |
| 449 | |
| 450 | if (auto localCert = getCertificate(id)) { |
| 451 | // Update certificate in the local store if relevant |
| 452 | if (localCert.get() != &cert && serial == localCert->getSerialNumber()) { |
| 453 | if (logger_) logger_->d("Updating OCSP for certificate %s in the local store", id.c_str()); |
| 454 | localCert->ocspResponse = cert.ocspResponse; |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | dht::ThreadPool::io().run([l=logger_, |
| 459 | path = dir + DIR_SEPARATOR_CH + serialhex, |
| 460 | dir = std::move(dir), |
| 461 | id = std::move(id), |
| 462 | serialhex = std::move(serialhex), |
| 463 | ocspResponse = cert.ocspResponse] { |
| 464 | if (l) l->d("Saving OCSP Response of device %s with serial %s", id.c_str(), serialhex.c_str()); |
| 465 | std::lock_guard<std::mutex> lock(fileutils::getFileLock(path)); |
| 466 | fileutils::check_dir(dir.c_str()); |
| 467 | fileutils::saveFile(path, ocspResponse->pack()); |
| 468 | }); |
| 469 | } |
| 470 | |
| 471 | TrustStore::PermissionStatus |
| 472 | TrustStore::statusFromStr(const char* str) |
| 473 | { |
| 474 | if (!std::strcmp(str, libjami::Certificate::Status::ALLOWED)) |
| 475 | return PermissionStatus::ALLOWED; |
| 476 | if (!std::strcmp(str, libjami::Certificate::Status::BANNED)) |
| 477 | return PermissionStatus::BANNED; |
| 478 | return PermissionStatus::UNDEFINED; |
| 479 | } |
| 480 | |
| 481 | const char* |
| 482 | TrustStore::statusToStr(TrustStore::PermissionStatus s) |
| 483 | { |
| 484 | switch (s) { |
| 485 | case PermissionStatus::ALLOWED: |
| 486 | return libjami::Certificate::Status::ALLOWED; |
| 487 | case PermissionStatus::BANNED: |
| 488 | return libjami::Certificate::Status::BANNED; |
| 489 | case PermissionStatus::UNDEFINED: |
| 490 | default: |
| 491 | return libjami::Certificate::Status::UNDEFINED; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | TrustStatus |
| 496 | trustStatusFromStr(const char* str) |
| 497 | { |
| 498 | if (!std::strcmp(str, libjami::Certificate::TrustStatus::TRUSTED)) |
| 499 | return TrustStatus::TRUSTED; |
| 500 | return TrustStatus::UNTRUSTED; |
| 501 | } |
| 502 | |
| 503 | const char* |
| 504 | statusToStr(TrustStatus s) |
| 505 | { |
| 506 | switch (s) { |
| 507 | case TrustStatus::TRUSTED: |
| 508 | return libjami::Certificate::TrustStatus::TRUSTED; |
| 509 | case TrustStatus::UNTRUSTED: |
| 510 | default: |
| 511 | return libjami::Certificate::TrustStatus::UNTRUSTED; |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | bool |
| 516 | TrustStore::addRevocationList(dht::crypto::RevocationList&& crl) |
| 517 | { |
| 518 | allowed_.add(crl); |
| 519 | return true; |
| 520 | } |
| 521 | |
| 522 | bool |
| 523 | TrustStore::setCertificateStatus(const std::string& cert_id, |
| 524 | const TrustStore::PermissionStatus status) |
| 525 | { |
| 526 | return setCertificateStatus(nullptr, cert_id, status, false); |
| 527 | } |
| 528 | |
| 529 | bool |
| 530 | TrustStore::setCertificateStatus(const std::shared_ptr<crypto::Certificate>& cert, |
| 531 | const TrustStore::PermissionStatus status, |
| 532 | bool local) |
| 533 | { |
| 534 | return setCertificateStatus(cert, cert->getId().toString(), status, local); |
| 535 | } |
| 536 | |
| 537 | bool |
| 538 | TrustStore::setCertificateStatus(std::shared_ptr<crypto::Certificate> cert, |
| 539 | const std::string& cert_id, |
| 540 | const TrustStore::PermissionStatus status, |
| 541 | bool local) |
| 542 | { |
| 543 | if (cert) |
| 544 | certStore_.pinCertificate(cert, local); |
| 545 | std::lock_guard<std::recursive_mutex> lk(mutex_); |
| 546 | updateKnownCerts(); |
| 547 | bool dirty {false}; |
| 548 | if (status == PermissionStatus::UNDEFINED) { |
| 549 | unknownCertStatus_.erase(cert_id); |
| 550 | dirty = certStatus_.erase(cert_id); |
| 551 | } else { |
| 552 | bool allowed = (status == PermissionStatus::ALLOWED); |
| 553 | auto s = certStatus_.find(cert_id); |
| 554 | if (s == std::end(certStatus_)) { |
| 555 | // Certificate state is currently undefined |
| 556 | if (not cert) |
| 557 | cert = certStore_.getCertificate(cert_id); |
| 558 | if (cert) { |
| 559 | unknownCertStatus_.erase(cert_id); |
| 560 | auto& crt_status = certStatus_[cert_id]; |
| 561 | if (not crt_status.first) |
| 562 | crt_status.first = cert; |
| 563 | crt_status.second.allowed = allowed; |
| 564 | setStoreCertStatus(*cert, allowed); |
| 565 | } else { |
| 566 | // Can't find certificate |
| 567 | unknownCertStatus_[cert_id].allowed = allowed; |
| 568 | } |
| 569 | } else { |
| 570 | // Certificate is already allowed or banned |
| 571 | if (s->second.second.allowed != allowed) { |
| 572 | s->second.second.allowed = allowed; |
| 573 | if (allowed) // Certificate is re-added after ban, rebuld needed |
| 574 | dirty = true; |
| 575 | else |
| 576 | allowed_.remove(*s->second.first, false); |
| 577 | } |
| 578 | } |
| 579 | } |
| 580 | if (dirty) |
| 581 | rebuildTrust(); |
| 582 | return true; |
| 583 | } |
| 584 | |
| 585 | TrustStore::PermissionStatus |
| 586 | TrustStore::getCertificateStatus(const std::string& cert_id) const |
| 587 | { |
| 588 | std::lock_guard<std::recursive_mutex> lk(mutex_); |
| 589 | auto s = certStatus_.find(cert_id); |
| 590 | if (s == std::end(certStatus_)) { |
| 591 | auto us = unknownCertStatus_.find(cert_id); |
| 592 | if (us == std::end(unknownCertStatus_)) |
| 593 | return PermissionStatus::UNDEFINED; |
| 594 | return us->second.allowed ? PermissionStatus::ALLOWED : PermissionStatus::BANNED; |
| 595 | } |
| 596 | return s->second.second.allowed ? PermissionStatus::ALLOWED : PermissionStatus::BANNED; |
| 597 | } |
| 598 | |
| 599 | std::vector<std::string> |
| 600 | TrustStore::getCertificatesByStatus(TrustStore::PermissionStatus status) const |
| 601 | { |
| 602 | std::lock_guard<std::recursive_mutex> lk(mutex_); |
| 603 | std::vector<std::string> ret; |
| 604 | for (const auto& i : certStatus_) |
| 605 | if (i.second.second.allowed == (status == TrustStore::PermissionStatus::ALLOWED)) |
| 606 | ret.emplace_back(i.first); |
| 607 | for (const auto& i : unknownCertStatus_) |
| 608 | if (i.second.allowed == (status == TrustStore::PermissionStatus::ALLOWED)) |
| 609 | ret.emplace_back(i.first); |
| 610 | return ret; |
| 611 | } |
| 612 | |
| 613 | bool |
| 614 | TrustStore::isAllowed(const crypto::Certificate& crt, bool allowPublic) |
| 615 | { |
| 616 | // Match by certificate pinning |
| 617 | std::lock_guard<std::recursive_mutex> lk(mutex_); |
| 618 | bool allowed {allowPublic}; |
| 619 | for (auto c = &crt; c; c = c->issuer.get()) { |
| 620 | auto status = getCertificateStatus(c->getId().toString()); // lock mutex_ |
| 621 | if (status == PermissionStatus::ALLOWED) |
| 622 | allowed = true; |
| 623 | else if (status == PermissionStatus::BANNED) |
| 624 | return false; |
| 625 | } |
| 626 | |
| 627 | // Match by certificate chain |
| 628 | updateKnownCerts(); |
| 629 | auto ret = allowed_.verify(crt); |
| 630 | // Unknown issuer (only that) are accepted if allowPublic is true |
| 631 | if (not ret |
| 632 | and !(allowPublic and ret.result == (GNUTLS_CERT_INVALID | GNUTLS_CERT_SIGNER_NOT_FOUND))) { |
| 633 | if (certStore_.logger()) |
| 634 | certStore_.logger()->warn("%s", ret.toString().c_str()); |
| 635 | return false; |
| 636 | } |
| 637 | |
| 638 | return allowed; |
| 639 | } |
| 640 | |
| 641 | void |
| 642 | TrustStore::updateKnownCerts() |
| 643 | { |
| 644 | auto i = std::begin(unknownCertStatus_); |
| 645 | while (i != std::end(unknownCertStatus_)) { |
| 646 | if (auto crt = certStore_.getCertificate(i->first)) { |
| 647 | certStatus_.emplace(i->first, std::make_pair(crt, i->second)); |
| 648 | setStoreCertStatus(*crt, i->second.allowed); |
| 649 | i = unknownCertStatus_.erase(i); |
| 650 | } else |
| 651 | ++i; |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | void |
| 656 | TrustStore::setStoreCertStatus(const crypto::Certificate& crt, bool status) |
| 657 | { |
| 658 | if (status) |
| 659 | allowed_.add(crt); |
| 660 | else |
| 661 | allowed_.remove(crt, false); |
| 662 | } |
| 663 | |
| 664 | void |
| 665 | TrustStore::rebuildTrust() |
| 666 | { |
| 667 | allowed_ = {}; |
| 668 | for (const auto& c : certStatus_) |
| 669 | setStoreCertStatus(*c.second.first, c.second.second.allowed); |
| 670 | } |
| 671 | |
| 672 | } // namespace tls |
| 673 | } // namespace jami |