mirror of https://github.com/Icinga/icinga2.git
295 lines
7.5 KiB
C++
295 lines
7.5 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "base/tlsstream.hpp"
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#include "base/utility.hpp"
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#include "base/exception.hpp"
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#include "base/logger_fwd.hpp"
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#include <boost/bind.hpp>
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#include <iostream>
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using namespace icinga;
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int I2_EXPORT TlsStream::m_SSLIndex;
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bool I2_EXPORT TlsStream::m_SSLIndexInitialized = false;
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/**
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* Constructor for the TlsStream class.
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*
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* @param role The role of the client.
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* @param sslContext The SSL context for the client.
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*/
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TlsStream::TlsStream(const Socket::Ptr& socket, ConnectionRole role, const shared_ptr<SSL_CTX>& sslContext)
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: m_Eof(false), m_Socket(socket), m_Role(role)
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{
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std::ostringstream msgbuf;
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char errbuf[120];
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m_SSL = shared_ptr<SSL>(SSL_new(sslContext.get()), SSL_free);
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if (!m_SSL) {
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msgbuf << "SSL_new() failed with code " << ERR_peek_error() << ", \"" << ERR_error_string(ERR_peek_error(), errbuf) << "\"";
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Log(LogCritical, "TlsStream", msgbuf.str());
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SSL_new")
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<< errinfo_openssl_error(ERR_peek_error()));
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}
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if (!m_SSLIndexInitialized) {
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m_SSLIndex = SSL_get_ex_new_index(0, const_cast<char *>("TlsStream"), NULL, NULL, NULL);
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m_SSLIndexInitialized = true;
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}
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SSL_set_ex_data(m_SSL.get(), m_SSLIndex, this);
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SSL_set_verify(m_SSL.get(), SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, NULL);
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socket->MakeNonBlocking();
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SSL_set_fd(m_SSL.get(), socket->GetFD());
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if (m_Role == RoleServer)
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SSL_set_accept_state(m_SSL.get());
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else
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SSL_set_connect_state(m_SSL.get());
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}
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/**
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* Retrieves the X509 certficate for this client.
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*
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* @returns The X509 certificate.
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*/
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shared_ptr<X509> TlsStream::GetClientCertificate(void) const
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{
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boost::mutex::scoped_lock lock(m_SSLLock);
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return shared_ptr<X509>(SSL_get_certificate(m_SSL.get()), &Utility::NullDeleter);
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}
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/**
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* Retrieves the X509 certficate for the peer.
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*
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* @returns The X509 certificate.
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*/
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shared_ptr<X509> TlsStream::GetPeerCertificate(void) const
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{
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boost::mutex::scoped_lock lock(m_SSLLock);
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return shared_ptr<X509>(SSL_get_peer_certificate(m_SSL.get()), X509_free);
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}
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void TlsStream::Handshake(void)
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{
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std::ostringstream msgbuf;
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char errbuf[120];
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boost::mutex::scoped_lock alock(m_IOActionLock);
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for (;;) {
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int rc, err;
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{
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boost::mutex::scoped_lock lock(m_SSLLock);
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rc = SSL_do_handshake(m_SSL.get());
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if (rc > 0)
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break;
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err = SSL_get_error(m_SSL.get(), rc);
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}
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switch (err) {
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case SSL_ERROR_WANT_READ:
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try {
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m_Socket->Poll(true, false);
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} catch (const std::exception&) {}
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continue;
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case SSL_ERROR_WANT_WRITE:
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try {
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m_Socket->Poll(false, true);
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} catch (const std::exception&) {}
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continue;
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case SSL_ERROR_ZERO_RETURN:
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Close();
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return;
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default:
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msgbuf << "SSL_do_handshake() failed with code " << ERR_peek_error() << ", \"" << ERR_error_string(ERR_peek_error(), errbuf) << "\"";
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Log(LogCritical, "TlsStream", msgbuf.str());
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SSL_do_handshake")
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<< errinfo_openssl_error(ERR_peek_error()));
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}
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}
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}
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/**
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* Processes data for the stream.
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*/
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size_t TlsStream::Read(void *buffer, size_t count)
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{
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size_t left = count;
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std::ostringstream msgbuf;
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char errbuf[120];
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m_Socket->Poll(true, false);
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boost::mutex::scoped_lock alock(m_IOActionLock);
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while (left > 0) {
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int rc, err;
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{
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boost::mutex::scoped_lock lock(m_SSLLock);
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rc = SSL_read(m_SSL.get(), ((char *)buffer) + (count - left), left);
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if (rc <= 0)
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err = SSL_get_error(m_SSL.get(), rc);
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}
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if (rc <= 0) {
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switch (err) {
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case SSL_ERROR_WANT_READ:
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try {
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m_Socket->Poll(true, false);
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} catch (const std::exception&) {}
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continue;
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case SSL_ERROR_WANT_WRITE:
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try {
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m_Socket->Poll(false, true);
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} catch (const std::exception&) {}
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continue;
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case SSL_ERROR_ZERO_RETURN:
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Close();
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return count - left;
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default:
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msgbuf << "SSL_read() failed with code " << ERR_peek_error() << ", \"" << ERR_error_string(ERR_peek_error(), errbuf) << "\"";
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Log(LogCritical, "TlsStream", msgbuf.str());
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SSL_read")
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<< errinfo_openssl_error(ERR_peek_error()));
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}
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}
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left -= rc;
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}
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return count;
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}
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void TlsStream::Write(const void *buffer, size_t count)
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{
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size_t left = count;
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std::ostringstream msgbuf;
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char errbuf[120];
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m_Socket->Poll(false, true);
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boost::mutex::scoped_lock alock(m_IOActionLock);
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while (left > 0) {
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int rc, err;
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{
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boost::mutex::scoped_lock lock(m_SSLLock);
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rc = SSL_write(m_SSL.get(), ((const char *)buffer) + (count - left), left);
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if (rc <= 0)
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err = SSL_get_error(m_SSL.get(), rc);
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}
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if (rc <= 0) {
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switch (err) {
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case SSL_ERROR_WANT_READ:
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try {
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m_Socket->Poll(true, false);
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} catch (const std::exception&) {}
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continue;
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case SSL_ERROR_WANT_WRITE:
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try {
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m_Socket->Poll(false, true);
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} catch (const std::exception&) {}
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continue;
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case SSL_ERROR_ZERO_RETURN:
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Close();
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return;
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default:
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msgbuf << "SSL_write() failed with code " << ERR_peek_error() << ", \"" << ERR_error_string(ERR_peek_error(), errbuf) << "\"";
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Log(LogCritical, "TlsStream", msgbuf.str());
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SSL_write")
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<< errinfo_openssl_error(ERR_peek_error()));
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}
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}
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left -= rc;
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}
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}
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/**
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* Closes the stream.
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*/
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void TlsStream::Close(void)
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{
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boost::mutex::scoped_lock alock(m_IOActionLock);
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m_Eof = true;
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for (int i = 0; i < 5; i++) {
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int rc, err;
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{
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boost::mutex::scoped_lock lock(m_SSLLock);
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rc = SSL_shutdown(m_SSL.get());
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if (rc == 0)
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continue;
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if (rc > 0)
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break;
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err = SSL_get_error(m_SSL.get(), rc);
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}
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switch (err) {
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case SSL_ERROR_WANT_READ:
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try {
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m_Socket->Poll(true, false);
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} catch (const std::exception&) {}
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continue;
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case SSL_ERROR_WANT_WRITE:
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try {
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m_Socket->Poll(false, true);
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} catch (const std::exception&) {}
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continue;
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default:
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goto close_socket;
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}
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}
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close_socket:
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m_Socket->Close();
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}
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bool TlsStream::IsEof(void) const
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{
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return m_Eof;
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}
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