| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chromeos/network/onc/onc_certificate_importer_impl.h" |
| |
| #include <cert.h> |
| #include <keyhi.h> |
| #include <pk11pub.h> |
| #include <stddef.h> |
| |
| #include "base/base64.h" |
| #include "base/bind.h" |
| #include "base/bind_helpers.h" |
| #include "base/callback.h" |
| #include "base/location.h" |
| #include "base/logging.h" |
| #include "base/sequenced_task_runner.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/threading/thread_task_runner_handle.h" |
| #include "base/values.h" |
| #include "chromeos/network/network_event_log.h" |
| #include "chromeos/network/onc/onc_utils.h" |
| #include "crypto/scoped_nss_types.h" |
| #include "net/base/net_errors.h" |
| #include "net/cert/nss_cert_database.h" |
| #include "net/cert/x509_util_nss.h" |
| |
| namespace chromeos { |
| namespace onc { |
| |
| namespace { |
| |
| void CallBackOnOriginLoop( |
| const scoped_refptr<base::SingleThreadTaskRunner>& origin_loop, |
| const CertificateImporter::DoneCallback& callback, |
| bool success, |
| net::ScopedCERTCertificateList onc_trusted_certificates) { |
| origin_loop->PostTask( |
| FROM_HERE, |
| base::BindOnce(callback, success, std::move(onc_trusted_certificates))); |
| } |
| |
| } // namespace |
| |
| CertificateImporterImpl::CertificateImporterImpl( |
| const scoped_refptr<base::SequencedTaskRunner>& io_task_runner, |
| net::NSSCertDatabase* target_nssdb) |
| : io_task_runner_(io_task_runner), |
| target_nssdb_(target_nssdb), |
| weak_factory_(this) { |
| CHECK(target_nssdb); |
| } |
| |
| CertificateImporterImpl::~CertificateImporterImpl() = default; |
| |
| void CertificateImporterImpl::ImportCertificates( |
| const base::ListValue& certificates, |
| ::onc::ONCSource source, |
| const DoneCallback& done_callback) { |
| VLOG(2) << "ONC file has " << certificates.GetSize() << " certificates"; |
| // |done_callback| must only be called as long as |this| still exists. |
| // Thereforce, call back to |this|. This check of |this| must happen last and |
| // on the origin thread. |
| DoneCallback callback_to_this = |
| base::Bind(&CertificateImporterImpl::RunDoneCallback, |
| weak_factory_.GetWeakPtr(), |
| done_callback); |
| |
| // |done_callback| must be called on the origin thread. |
| DoneCallback callback_on_origin_loop = |
| base::Bind(&CallBackOnOriginLoop, |
| base::ThreadTaskRunnerHandle::Get(), |
| callback_to_this); |
| |
| // This is the actual function that imports the certificates. |
| base::Closure import_certs_callback = |
| base::Bind(&ParseAndStoreCertificates, |
| source, |
| callback_on_origin_loop, |
| base::Owned(certificates.DeepCopy()), |
| target_nssdb_); |
| |
| // The NSSCertDatabase must be accessed on |io_task_runner_| |
| io_task_runner_->PostTask(FROM_HERE, import_certs_callback); |
| } |
| |
| // static |
| void CertificateImporterImpl::ParseAndStoreCertificates( |
| ::onc::ONCSource source, |
| const DoneCallback& done_callback, |
| base::ListValue* certificates, |
| net::NSSCertDatabase* nssdb) { |
| // Web trust is only granted to certificates imported by the user. |
| bool allow_trust_imports = source == ::onc::ONC_SOURCE_USER_IMPORT; |
| net::ScopedCERTCertificateList onc_trusted_certificates; |
| bool success = true; |
| for (size_t i = 0; i < certificates->GetSize(); ++i) { |
| const base::DictionaryValue* certificate = NULL; |
| certificates->GetDictionary(i, &certificate); |
| DCHECK(certificate != NULL); |
| |
| VLOG(2) << "Parsing certificate at index " << i << ": " << *certificate; |
| |
| if (!ParseAndStoreCertificate(source, allow_trust_imports, *certificate, |
| nssdb, &onc_trusted_certificates)) { |
| success = false; |
| LOG(ERROR) << "Cannot parse certificate at index " << i; |
| } else { |
| VLOG(2) << "Successfully imported certificate at index " << i; |
| } |
| } |
| |
| done_callback.Run(success, std::move(onc_trusted_certificates)); |
| } |
| |
| void CertificateImporterImpl::RunDoneCallback( |
| const CertificateImporter::DoneCallback& callback, |
| bool success, |
| net::ScopedCERTCertificateList onc_trusted_certificates) { |
| if (!success) |
| NET_LOG_ERROR("ONC Certificate Import Error", ""); |
| callback.Run(success, std::move(onc_trusted_certificates)); |
| } |
| |
| bool CertificateImporterImpl::ParseAndStoreCertificate( |
| ::onc::ONCSource source, |
| bool allow_trust_imports, |
| const base::DictionaryValue& certificate, |
| net::NSSCertDatabase* nssdb, |
| net::ScopedCERTCertificateList* onc_trusted_certificates) { |
| std::string guid; |
| certificate.GetStringWithoutPathExpansion(::onc::certificate::kGUID, &guid); |
| DCHECK(!guid.empty()); |
| |
| std::string cert_type; |
| certificate.GetStringWithoutPathExpansion(::onc::certificate::kType, |
| &cert_type); |
| if (cert_type == ::onc::certificate::kServer || |
| cert_type == ::onc::certificate::kAuthority) { |
| return ParseServerOrCaCertificate(source, allow_trust_imports, cert_type, |
| guid, certificate, nssdb, |
| onc_trusted_certificates); |
| } else if (cert_type == ::onc::certificate::kClient) { |
| return ParseClientCertificate(guid, certificate, nssdb); |
| } |
| |
| NOTREACHED(); |
| return false; |
| } |
| |
| bool CertificateImporterImpl::ParseServerOrCaCertificate( |
| ::onc::ONCSource source, |
| bool allow_trust_imports, |
| const std::string& cert_type, |
| const std::string& guid, |
| const base::DictionaryValue& certificate, |
| net::NSSCertDatabase* nssdb, |
| net::ScopedCERTCertificateList* onc_trusted_certificates) { |
| // Device policy can't import certificates. |
| if (source == ::onc::ONC_SOURCE_DEVICE_POLICY) { |
| // This isn't a parsing error. |
| LOG(WARNING) << "Refusing to import certificate from device policy:" |
| << guid; |
| return true; |
| } |
| |
| bool web_trust_flag = false; |
| const base::ListValue* trust_list = NULL; |
| if (certificate.GetListWithoutPathExpansion(::onc::certificate::kTrustBits, |
| &trust_list)) { |
| for (base::ListValue::const_iterator it = trust_list->begin(); |
| it != trust_list->end(); ++it) { |
| std::string trust_type; |
| if (!it->GetAsString(&trust_type)) |
| NOTREACHED(); |
| |
| if (trust_type == ::onc::certificate::kWeb) { |
| // "Web" implies that the certificate is to be trusted for SSL |
| // identification. |
| web_trust_flag = true; |
| } else { |
| // Trust bits should only increase trust and never restrict. Thus, |
| // ignoring unknown bits should be safe. |
| LOG(WARNING) << "Certificate contains unknown trust type " |
| << trust_type; |
| } |
| } |
| } |
| |
| bool import_with_ssl_trust = false; |
| if (web_trust_flag) { |
| if (!allow_trust_imports) |
| LOG(WARNING) << "Web trust not granted for certificate: " << guid; |
| else |
| import_with_ssl_trust = true; |
| } |
| |
| std::string x509_data; |
| if (!certificate.GetStringWithoutPathExpansion(::onc::certificate::kX509, |
| &x509_data) || |
| x509_data.empty()) { |
| LOG(ERROR) << "Certificate missing appropriate certificate data for type: " |
| << cert_type; |
| return false; |
| } |
| |
| net::ScopedCERTCertificate x509_cert = DecodePEMCertificate(x509_data); |
| if (!x509_cert.get()) { |
| LOG(ERROR) << "Unable to create certificate from PEM encoding, type: " |
| << cert_type; |
| return false; |
| } |
| |
| net::NSSCertDatabase::TrustBits trust = (import_with_ssl_trust ? |
| net::NSSCertDatabase::TRUSTED_SSL : |
| net::NSSCertDatabase::TRUST_DEFAULT); |
| |
| if (x509_cert.get()->isperm) { |
| net::CertType net_cert_type = |
| cert_type == ::onc::certificate::kServer ? net::SERVER_CERT |
| : net::CA_CERT; |
| VLOG(1) << "Certificate is already installed."; |
| net::NSSCertDatabase::TrustBits missing_trust_bits = |
| trust & ~nssdb->GetCertTrust(x509_cert.get(), net_cert_type); |
| if (missing_trust_bits) { |
| std::string error_reason; |
| bool success = false; |
| if (nssdb->IsReadOnly(x509_cert.get())) { |
| error_reason = " Certificate is stored read-only."; |
| } else { |
| success = nssdb->SetCertTrust(x509_cert.get(), net_cert_type, trust); |
| } |
| if (!success) { |
| LOG(ERROR) << "Certificate of type " << cert_type |
| << " was already present, but trust couldn't be set." |
| << error_reason; |
| } |
| } |
| } else { |
| net::ScopedCERTCertificateList cert_list; |
| cert_list.push_back(net::x509_util::DupCERTCertificate(x509_cert.get())); |
| net::NSSCertDatabase::ImportCertFailureList failures; |
| bool success = false; |
| if (cert_type == ::onc::certificate::kServer) |
| success = nssdb->ImportServerCert(cert_list, trust, &failures); |
| else // Authority cert |
| success = nssdb->ImportCACerts(cert_list, trust, &failures); |
| |
| if (!failures.empty()) { |
| std::string error_string = net::ErrorToString(failures[0].net_error); |
| LOG(ERROR) << "Error ( " << error_string |
| << " ) importing certificate of type " << cert_type; |
| return false; |
| } |
| |
| if (!success) { |
| LOG(ERROR) << "Unknown error importing " << cert_type << " certificate."; |
| return false; |
| } |
| } |
| |
| if (web_trust_flag && onc_trusted_certificates) |
| onc_trusted_certificates->push_back(std::move(x509_cert)); |
| |
| return true; |
| } |
| |
| bool CertificateImporterImpl::ParseClientCertificate( |
| const std::string& guid, |
| const base::DictionaryValue& certificate, |
| net::NSSCertDatabase* nssdb) { |
| std::string pkcs12_data; |
| if (!certificate.GetStringWithoutPathExpansion(::onc::certificate::kPKCS12, |
| &pkcs12_data) || |
| pkcs12_data.empty()) { |
| LOG(ERROR) << "PKCS12 data is missing for client certificate."; |
| return false; |
| } |
| |
| std::string decoded_pkcs12; |
| if (!base::Base64Decode(pkcs12_data, &decoded_pkcs12)) { |
| LOG(ERROR) << "Unable to base64 decode PKCS#12 data: \"" << pkcs12_data |
| << "\"."; |
| return false; |
| } |
| |
| // Since this has a private key, always use the private module. |
| crypto::ScopedPK11Slot private_slot(nssdb->GetPrivateSlot()); |
| if (!private_slot) |
| return false; |
| |
| net::ScopedCERTCertificateList imported_certs; |
| |
| int import_result = |
| nssdb->ImportFromPKCS12(private_slot.get(), decoded_pkcs12, |
| base::string16(), false, &imported_certs); |
| if (import_result != net::OK) { |
| std::string error_string = net::ErrorToString(import_result); |
| LOG(ERROR) << "Unable to import client certificate, error: " |
| << error_string; |
| return false; |
| } |
| |
| if (imported_certs.size() == 0) { |
| LOG(WARNING) << "PKCS12 data contains no importable certificates."; |
| return true; |
| } |
| |
| if (imported_certs.size() != 1) { |
| LOG(WARNING) << "ONC File: PKCS12 data contains more than one certificate. " |
| "Only the first one will be imported."; |
| } |
| |
| CERTCertificate* cert_result = imported_certs[0].get(); |
| |
| // Find the private key associated with this certificate, and set the |
| // nickname on it. |
| SECKEYPrivateKey* private_key = PK11_FindPrivateKeyFromCert( |
| cert_result->slot, cert_result, nullptr /* wincx */); |
| if (private_key) { |
| PK11_SetPrivateKeyNickname(private_key, const_cast<char*>(guid.c_str())); |
| SECKEY_DestroyPrivateKey(private_key); |
| } else { |
| LOG(WARNING) << "Unable to find private key for certificate."; |
| } |
| return true; |
| } |
| |
| } // namespace onc |
| } // namespace chromeos |
