mirror of https://github.com/Icinga/icinga2.git
453 lines
12 KiB
C++
453 lines
12 KiB
C++
/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
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#include "remote/pkiutility.hpp"
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#include "remote/apilistener.hpp"
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#include "base/defer.hpp"
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#include "base/io-engine.hpp"
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#include "base/logger.hpp"
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#include "base/application.hpp"
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#include "base/tcpsocket.hpp"
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#include "base/tlsutility.hpp"
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#include "base/console.hpp"
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#include "base/tlsstream.hpp"
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#include "base/tcpsocket.hpp"
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#include "base/json.hpp"
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#include "base/utility.hpp"
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#include "base/convert.hpp"
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#include "base/exception.hpp"
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#include "remote/jsonrpc.hpp"
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#include <fstream>
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#include <iostream>
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#include <boost/asio/ssl/context.hpp>
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#include <boost/filesystem/path.hpp>
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using namespace icinga;
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int PkiUtility::NewCa()
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{
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String caDir = ApiListener::GetCaDir();
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String caCertFile = caDir + "/ca.crt";
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String caKeyFile = caDir + "/ca.key";
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if (Utility::PathExists(caCertFile) && Utility::PathExists(caKeyFile)) {
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Log(LogWarning, "cli")
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<< "CA files '" << caCertFile << "' and '" << caKeyFile << "' already exist.";
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return 1;
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}
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Utility::MkDirP(caDir, 0700);
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MakeX509CSR("Icinga CA", caKeyFile, String(), caCertFile, true);
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return 0;
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}
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int PkiUtility::NewCert(const String& cn, const String& keyfile, const String& csrfile, const String& certfile)
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{
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try {
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MakeX509CSR(cn, keyfile, csrfile, certfile);
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} catch(std::exception&) {
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return 1;
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}
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return 0;
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}
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int PkiUtility::SignCsr(const String& csrfile, const String& certfile)
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{
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char errbuf[256];
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InitializeOpenSSL();
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BIO *csrbio = BIO_new_file(csrfile.CStr(), "r");
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X509_REQ *req = PEM_read_bio_X509_REQ(csrbio, nullptr, nullptr, nullptr);
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if (!req) {
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ERR_error_string_n(ERR_peek_error(), errbuf, sizeof errbuf);
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Log(LogCritical, "SSL")
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<< "Could not read X509 certificate request from '" << csrfile << "': " << ERR_peek_error() << ", \"" << errbuf << "\"";
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return 1;
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}
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BIO_free(csrbio);
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std::shared_ptr<EVP_PKEY> pubkey = std::shared_ptr<EVP_PKEY>(X509_REQ_get_pubkey(req), EVP_PKEY_free);
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std::shared_ptr<X509> cert = CreateCertIcingaCA(pubkey.get(), X509_REQ_get_subject_name(req));
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X509_REQ_free(req);
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WriteCert(cert, certfile);
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return 0;
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}
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std::shared_ptr<X509> PkiUtility::FetchCert(const String& host, const String& port)
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{
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Shared<boost::asio::ssl::context>::Ptr sslContext;
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try {
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sslContext = MakeAsioSslContext();
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} catch (const std::exception& ex) {
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Log(LogCritical, "pki")
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<< "Cannot make SSL context.";
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Log(LogDebug, "pki")
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<< "Cannot make SSL context:\n" << DiagnosticInformation(ex);
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return std::shared_ptr<X509>();
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}
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auto stream (Shared<AsioTlsStream>::Make(IoEngine::Get().GetIoContext(), *sslContext, host));
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try {
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Connect(stream->lowest_layer(), host, port);
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} catch (const std::exception& ex) {
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Log(LogCritical, "pki")
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<< "Cannot connect to host '" << host << "' on port '" << port << "'";
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Log(LogDebug, "pki")
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<< "Cannot connect to host '" << host << "' on port '" << port << "':\n" << DiagnosticInformation(ex);
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return std::shared_ptr<X509>();
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}
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auto& sslConn (stream->next_layer());
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try {
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sslConn.handshake(sslConn.client);
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} catch (const std::exception& ex) {
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Log(LogCritical, "pki")
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<< "Client TLS handshake failed. (" << ex.what() << ")";
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return std::shared_ptr<X509>();
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}
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Defer shutdown ([&sslConn]() { sslConn.shutdown(); });
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return sslConn.GetPeerCertificate();
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}
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int PkiUtility::WriteCert(const std::shared_ptr<X509>& cert, const String& trustedfile)
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{
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std::ofstream fpcert;
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fpcert.open(trustedfile.CStr());
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fpcert << CertificateToString(cert);
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fpcert.close();
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if (fpcert.fail()) {
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Log(LogCritical, "pki")
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<< "Could not write certificate to file '" << trustedfile << "'.";
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return 1;
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}
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Log(LogInformation, "pki")
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<< "Writing certificate to file '" << trustedfile << "'.";
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return 0;
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}
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int PkiUtility::GenTicket(const String& cn, const String& salt, std::ostream& ticketfp)
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{
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ticketfp << PBKDF2_SHA1(cn, salt, 50000) << "\n";
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return 0;
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}
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int PkiUtility::RequestCertificate(const String& host, const String& port, const String& keyfile,
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const String& certfile, const String& cafile, const std::shared_ptr<X509>& trustedCert, const String& ticket)
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{
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Shared<boost::asio::ssl::context>::Ptr sslContext;
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try {
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sslContext = MakeAsioSslContext(certfile, keyfile);
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} catch (const std::exception& ex) {
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Log(LogCritical, "cli")
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<< "Cannot make SSL context for cert path: '" << certfile << "' key path: '" << keyfile << "' ca path: '" << cafile << "'.";
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Log(LogDebug, "cli")
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<< "Cannot make SSL context for cert path: '" << certfile << "' key path: '" << keyfile << "' ca path: '" << cafile << "':\n" << DiagnosticInformation(ex);
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return 1;
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}
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auto stream (Shared<AsioTlsStream>::Make(IoEngine::Get().GetIoContext(), *sslContext, host));
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try {
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Connect(stream->lowest_layer(), host, port);
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} catch (const std::exception& ex) {
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Log(LogCritical, "cli")
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<< "Cannot connect to host '" << host << "' on port '" << port << "'";
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Log(LogDebug, "cli")
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<< "Cannot connect to host '" << host << "' on port '" << port << "':\n" << DiagnosticInformation(ex);
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return 1;
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}
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auto& sslConn (stream->next_layer());
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try {
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sslConn.handshake(sslConn.client);
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} catch (const std::exception& ex) {
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Log(LogCritical, "cli")
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<< "Client TLS handshake failed: " << DiagnosticInformation(ex, false);
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return 1;
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}
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Defer shutdown ([&sslConn]() { sslConn.shutdown(); });
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auto peerCert (sslConn.GetPeerCertificate());
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if (X509_cmp(peerCert.get(), trustedCert.get())) {
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Log(LogCritical, "cli", "Peer certificate does not match trusted certificate.");
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return 1;
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}
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Dictionary::Ptr params = new Dictionary({
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{ "ticket", String(ticket) }
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});
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String msgid = Utility::NewUniqueID();
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Dictionary::Ptr request = new Dictionary({
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{ "jsonrpc", "2.0" },
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{ "id", msgid },
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{ "method", "pki::RequestCertificate" },
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{ "params", params }
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});
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Dictionary::Ptr response;
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try {
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JsonRpc::SendMessage(stream, request);
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stream->flush();
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for (;;) {
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response = JsonRpc::DecodeMessage(JsonRpc::ReadMessage(stream));
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if (response && response->Contains("error")) {
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Log(LogCritical, "cli", "Could not fetch valid response. Please check the master log (notice or debug).");
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#ifdef I2_DEBUG
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/* we shouldn't expose master errors to the user in production environments */
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Log(LogCritical, "cli", response->Get("error"));
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#endif /* I2_DEBUG */
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return 1;
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}
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if (response && (response->Get("id") != msgid))
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continue;
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break;
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}
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} catch (...) {
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Log(LogCritical, "cli", "Could not fetch valid response. Please check the master log.");
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return 1;
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}
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if (!response) {
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Log(LogCritical, "cli", "Could not fetch valid response. Please check the master log.");
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return 1;
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}
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Dictionary::Ptr result = response->Get("result");
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if (result->Contains("ca")) {
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try {
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StringToCertificate(result->Get("ca"));
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} catch (const std::exception& ex) {
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Log(LogCritical, "cli")
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<< "Could not write CA file: " << DiagnosticInformation(ex, false);
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return 1;
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}
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Log(LogInformation, "cli")
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<< "Writing CA certificate to file '" << cafile << "'.";
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std::ofstream fpca;
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fpca.open(cafile.CStr());
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fpca << result->Get("ca");
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fpca.close();
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if (fpca.fail()) {
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Log(LogCritical, "cli")
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<< "Could not open CA certificate file '" << cafile << "' for writing.";
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return 1;
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}
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}
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if (result->Contains("error")) {
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LogSeverity severity;
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Value vstatus;
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if (!result->Get("status_code", &vstatus))
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vstatus = 1;
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int status = vstatus;
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if (status == 1)
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severity = LogCritical;
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else {
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severity = LogInformation;
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Log(severity, "cli", "!!!!!!");
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}
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Log(severity, "cli")
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<< "!!! " << result->Get("error");
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if (status == 1)
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return 1;
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else {
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Log(severity, "cli", "!!!!!!");
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return 0;
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}
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}
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try {
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StringToCertificate(result->Get("cert"));
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} catch (const std::exception& ex) {
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Log(LogCritical, "cli")
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<< "Could not write certificate file: " << DiagnosticInformation(ex, false);
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return 1;
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}
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Log(LogInformation, "cli")
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<< "Writing signed certificate to file '" << certfile << "'.";
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std::ofstream fpcert;
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fpcert.open(certfile.CStr());
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fpcert << result->Get("cert");
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fpcert.close();
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if (fpcert.fail()) {
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Log(LogCritical, "cli")
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<< "Could not write certificate to file '" << certfile << "'.";
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return 1;
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}
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return 0;
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}
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String PkiUtility::GetCertificateInformation(const std::shared_ptr<X509>& cert) {
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BIO *out = BIO_new(BIO_s_mem());
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String pre;
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pre = "\n Version: " + Convert::ToString(GetCertificateVersion(cert));
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BIO_write(out, pre.CStr(), pre.GetLength());
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pre = "\n Subject: ";
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BIO_write(out, pre.CStr(), pre.GetLength());
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X509_NAME_print_ex(out, X509_get_subject_name(cert.get()), 0, XN_FLAG_ONELINE & ~ASN1_STRFLGS_ESC_MSB);
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pre = "\n Issuer: ";
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BIO_write(out, pre.CStr(), pre.GetLength());
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X509_NAME_print_ex(out, X509_get_issuer_name(cert.get()), 0, XN_FLAG_ONELINE & ~ASN1_STRFLGS_ESC_MSB);
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pre = "\n Valid From: ";
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BIO_write(out, pre.CStr(), pre.GetLength());
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ASN1_TIME_print(out, X509_get_notBefore(cert.get()));
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pre = "\n Valid Until: ";
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BIO_write(out, pre.CStr(), pre.GetLength());
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ASN1_TIME_print(out, X509_get_notAfter(cert.get()));
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pre = "\n Serial: ";
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BIO_write(out, pre.CStr(), pre.GetLength());
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ASN1_INTEGER *asn1_serial = X509_get_serialNumber(cert.get());
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for (int i = 0; i < asn1_serial->length; i++) {
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BIO_printf(out, "%02x%c", asn1_serial->data[i], ((i + 1 == asn1_serial->length) ? '\n' : ':'));
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}
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pre = "\n Signature Algorithm: " + GetSignatureAlgorithm(cert);
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BIO_write(out, pre.CStr(), pre.GetLength());
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pre = "\n Subject Alt Names: " + GetSubjectAltNames(cert)->Join(" ");
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BIO_write(out, pre.CStr(), pre.GetLength());
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pre = "\n Fingerprint: ";
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BIO_write(out, pre.CStr(), pre.GetLength());
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unsigned char md[EVP_MAX_MD_SIZE];
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unsigned int diglen;
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X509_digest(cert.get(), EVP_sha256(), md, &diglen);
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char *data;
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long length = BIO_get_mem_data(out, &data);
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std::stringstream info;
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info << String(data, data + length);
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BIO_free(out);
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for (unsigned int i = 0; i < diglen; i++) {
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info << std::setfill('0') << std::setw(2) << std::uppercase
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<< std::hex << static_cast<int>(md[i]) << ' ';
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}
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info << '\n';
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return info.str();
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}
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static void CollectRequestHandler(const Dictionary::Ptr& requests, const String& requestFile)
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{
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Dictionary::Ptr request = Utility::LoadJsonFile(requestFile);
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if (!request)
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return;
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Dictionary::Ptr result = new Dictionary();
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namespace fs = boost::filesystem;
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fs::path file(requestFile.Begin(), requestFile.End());
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String fingerprint = file.stem().string();
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String certRequestText = request->Get("cert_request");
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result->Set("cert_request", certRequestText);
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Value vcertResponseText;
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if (request->Get("cert_response", &vcertResponseText)) {
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String certResponseText = vcertResponseText;
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result->Set("cert_response", certResponseText);
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}
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std::shared_ptr<X509> certRequest = StringToCertificate(certRequestText);
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/* XXX (requires OpenSSL >= 1.0.0)
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time_t now;
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time(&now);
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ASN1_TIME *tm = ASN1_TIME_adj(nullptr, now, 0, 0);
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int day, sec;
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ASN1_TIME_diff(&day, &sec, tm, X509_get_notBefore(certRequest.get()));
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result->Set("timestamp", static_cast<double>(now) + day * 24 * 60 * 60 + sec); */
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BIO *out = BIO_new(BIO_s_mem());
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ASN1_TIME_print(out, X509_get_notBefore(certRequest.get()));
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char *data;
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long length;
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length = BIO_get_mem_data(out, &data);
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result->Set("timestamp", String(data, data + length));
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BIO_free(out);
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out = BIO_new(BIO_s_mem());
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X509_NAME_print_ex(out, X509_get_subject_name(certRequest.get()), 0, XN_FLAG_ONELINE & ~ASN1_STRFLGS_ESC_MSB);
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length = BIO_get_mem_data(out, &data);
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result->Set("subject", String(data, data + length));
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BIO_free(out);
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requests->Set(fingerprint, result);
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}
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Dictionary::Ptr PkiUtility::GetCertificateRequests(bool removed)
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{
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Dictionary::Ptr requests = new Dictionary();
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String requestDir = ApiListener::GetCertificateRequestsDir();
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String ext = "json";
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if (removed)
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ext = "removed";
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if (Utility::PathExists(requestDir))
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Utility::Glob(requestDir + "/*." + ext, std::bind(&CollectRequestHandler, requests, _1), GlobFile);
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return requests;
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}
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