[Development] Rename CSecurityTLSBase class to CSecurityTLS.
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4110 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/rfb/CSecurityTLS.cxx b/common/rfb/CSecurityTLS.cxx
new file mode 100644
index 0000000..7b2456d
--- /dev/null
+++ b/common/rfb/CSecurityTLS.cxx
@@ -0,0 +1,237 @@
+/*
+ * Copyright (C) 2004 Red Hat Inc.
+ * Copyright (C) 2005 Martin Koegler
+ * Copyright (C) 2010 TigerVNC Team
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifndef HAVE_GNUTLS
+#error "This header should not be compiled without HAVE_GNUTLS defined"
+#endif
+
+#include <rfb/CSecurityTLS.h>
+#include <rfb/SSecurityVeNCrypt.h>
+#include <rfb/CConnection.h>
+#include <rfb/LogWriter.h>
+#include <rfb/Exception.h>
+#include <rdr/TLSInStream.h>
+#include <rdr/TLSOutStream.h>
+
+#include <gnutls/x509.h>
+
+#define TLS_DEBUG
+
+using namespace rfb;
+
+StringParameter CSecurityTLS::x509ca("x509ca", "X509 CA certificate", "", ConfViewer);
+StringParameter CSecurityTLS::x509crl("x509crl", "X509 CRL file", "", ConfViewer);
+
+static LogWriter vlog("TLS");
+
+#ifdef TLS_DEBUG
+static void debug_log(int level, const char* str)
+{
+ vlog.debug(str);
+}
+#endif
+
+void CSecurityTLS::initGlobal()
+{
+ static bool globalInitDone = false;
+
+ if (!globalInitDone) {
+ gnutls_global_init();
+
+#ifdef TLS_DEBUG
+ gnutls_global_set_log_level(10);
+ gnutls_global_set_log_function(debug_log);
+#endif
+
+ globalInitDone = true;
+ }
+}
+
+CSecurityTLS::CSecurityTLS(bool _anon) : session(0), anon_cred(0),
+ anon(_anon), fis(0), fos(0)
+{
+ cafile = x509ca.getData();
+ crlfile = x509crl.getData();
+}
+
+void CSecurityTLS::shutdown()
+{
+ if (session)
+ gnutls_bye(session, GNUTLS_SHUT_RDWR);
+
+ if (anon_cred) {
+ gnutls_anon_free_client_credentials(anon_cred);
+ anon_cred = 0;
+ }
+
+ if (cert_cred) {
+ gnutls_certificate_free_credentials(cert_cred);
+ cert_cred = 0;
+ }
+
+ if (session) {
+ gnutls_deinit(session);
+ session = 0;
+
+ gnutls_global_deinit();
+ }
+}
+
+
+CSecurityTLS::~CSecurityTLS()
+{
+ shutdown();
+
+ if (fis)
+ delete fis;
+ if (fos)
+ delete fos;
+
+ delete[] cafile;
+ delete[] crlfile;
+}
+
+bool CSecurityTLS::processMsg(CConnection* cc)
+{
+ rdr::InStream* is = cc->getInStream();
+ rdr::OutStream* os = cc->getOutStream();
+ client = cc;
+
+ initGlobal();
+
+ if (!session) {
+ if (!is->checkNoWait(1))
+ return false;
+
+ if (is->readU8() == 0)
+ return true;
+
+ gnutls_init(&session, GNUTLS_CLIENT);
+ gnutls_set_default_priority(session);
+
+ setParam();
+
+ gnutls_transport_set_pull_function(session, rdr::gnutls_InStream_pull);
+ gnutls_transport_set_push_function(session, rdr::gnutls_OutStream_push);
+ gnutls_transport_set_ptr2(session,
+ (gnutls_transport_ptr) is,
+ (gnutls_transport_ptr) os);
+ }
+
+ int err;
+ err = gnutls_handshake(session);
+ if (err != GNUTLS_E_SUCCESS && !gnutls_error_is_fatal(err))
+ return false;
+
+ if (err != GNUTLS_E_SUCCESS) {
+ vlog.error("TLS Handshake failed: %s\n", gnutls_strerror (err));
+ shutdown();
+ throw AuthFailureException("TLS Handshake failed");
+ }
+
+ checkSession();
+
+ cc->setStreams(fis = new rdr::TLSInStream(is, session),
+ fos = new rdr::TLSOutStream(os, session));
+
+ return true;
+}
+
+void CSecurityTLS::setParam()
+{
+ static const int kx_anon_priority[] = { GNUTLS_KX_ANON_DH, 0 };
+ static const int kx_priority[] = { GNUTLS_KX_DHE_DSS, GNUTLS_KX_RSA,
+ GNUTLS_KX_DHE_RSA, GNUTLS_KX_SRP, 0 };
+
+ if (anon) {
+ gnutls_kx_set_priority(session, kx_anon_priority);
+ gnutls_anon_allocate_client_credentials(&anon_cred);
+ gnutls_credentials_set(session, GNUTLS_CRD_ANON, anon_cred);
+
+ vlog.debug("Anonymous session has been set");
+ } else {
+ gnutls_kx_set_priority(session, kx_priority);
+ gnutls_certificate_allocate_credentials(&cert_cred);
+
+ if (*cafile && gnutls_certificate_set_x509_trust_file(cert_cred,cafile,GNUTLS_X509_FMT_PEM) < 0)
+ throw AuthFailureException("load of CA cert failed");
+
+ if (*crlfile && gnutls_certificate_set_x509_crl_file(cert_cred,crlfile,GNUTLS_X509_FMT_PEM) < 0)
+ throw AuthFailureException("load of CRL failed");
+
+ gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, cert_cred);
+
+ vlog.debug("X509 session has been set");
+ }
+}
+
+void CSecurityTLS::checkSession()
+{
+ int status;
+ const gnutls_datum *cert_list;
+ unsigned int cert_list_size = 0;
+ unsigned int i;
+
+ if (anon)
+ return;
+
+ if (gnutls_certificate_type_get(session) != GNUTLS_CRT_X509)
+ throw AuthFailureException("unsupported certificate type");
+
+ cert_list = gnutls_certificate_get_peers(session, &cert_list_size);
+ if (!cert_list_size)
+ throw AuthFailureException("unsupported certificate type");
+
+ status = gnutls_certificate_verify_peers(session);
+ if (status == GNUTLS_E_NO_CERTIFICATE_FOUND)
+ throw AuthFailureException("no certificate sent");
+
+ if (status < 0) {
+ vlog.error("X509 verify failed: %s\n", gnutls_strerror (status));
+ throw AuthFailureException("certificate verification failed");
+ }
+
+ if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
+ throw AuthFailureException("certificate issuer unknown");
+
+ if (status & GNUTLS_CERT_INVALID)
+ throw AuthFailureException("certificate not trusted");
+
+ for (i = 0; i < cert_list_size; i++) {
+ gnutls_x509_crt crt;
+ gnutls_x509_crt_init(&crt);
+
+ if (gnutls_x509_crt_import(crt, &cert_list[i],GNUTLS_X509_FMT_DER) < 0)
+ throw AuthFailureException("Decoding of certificate failed");
+
+ if (gnutls_x509_crt_check_hostname(crt, client->getServerName()) == 0) {
+#if 0
+ throw AuthFailureException("Hostname mismatch"); /* Non-fatal for now... */
+#endif
+ }
+ gnutls_x509_crt_deinit(crt);
+ }
+}
+