icinga2/lib/base/tlsstream.cpp

223 lines
5.9 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2013 Icinga Development Team (http://www.icinga.org/) *
* *
* This program 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 program 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 program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "base/tlsstream.h"
#include "base/stream_bio.h"
#include "base/objectlock.h"
#include "base/debug.h"
#include "base/utility.h"
#include "base/exception.h"
#include <boost/bind.hpp>
#include <boost/make_shared.hpp>
using namespace icinga;
int I2_EXPORT TlsStream::m_SSLIndex;
bool I2_EXPORT TlsStream::m_SSLIndexInitialized = false;
/**
* Constructor for the TlsStream class.
*
* @param role The role of the client.
* @param sslContext The SSL context for the client.
*/
TlsStream::TlsStream(const Stream::Ptr& innerStream, TlsRole role, shared_ptr<SSL_CTX> sslContext)
: m_SSLContext(sslContext), m_Role(role)
{
m_InnerStream = dynamic_pointer_cast<BufferedStream>(innerStream);
if (!m_InnerStream)
m_InnerStream = boost::make_shared<BufferedStream>(innerStream);
m_InnerStream->MakeNonBlocking();
m_SSL = shared_ptr<SSL>(SSL_new(m_SSLContext.get()), SSL_free);
m_SSLContext.reset();
if (!m_SSL) {
BOOST_THROW_EXCEPTION(openssl_error()
<< boost::errinfo_api_function("SSL_new")
<< errinfo_openssl_error(ERR_get_error()));
}
if (!m_SSLIndexInitialized) {
m_SSLIndex = SSL_get_ex_new_index(0, const_cast<char *>("TlsStream"), NULL, NULL, NULL);
m_SSLIndexInitialized = true;
}
SSL_set_ex_data(m_SSL.get(), m_SSLIndex, this);
SSL_set_verify(m_SSL.get(), SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, NULL);
m_BIO = BIO_new_I2Stream(m_InnerStream);
SSL_set_bio(m_SSL.get(), m_BIO, m_BIO);
if (m_Role == TlsRoleServer)
SSL_set_accept_state(m_SSL.get());
else
SSL_set_connect_state(m_SSL.get());
}
/**
* Retrieves the X509 certficate for this client.
*
* @returns The X509 certificate.
*/
shared_ptr<X509> TlsStream::GetClientCertificate(void) const
{
return shared_ptr<X509>(SSL_get_certificate(m_SSL.get()), &Utility::NullDeleter);
}
/**
* Retrieves the X509 certficate for the peer.
*
* @returns The X509 certificate.
*/
shared_ptr<X509> TlsStream::GetPeerCertificate(void) const
{
return shared_ptr<X509>(SSL_get_peer_certificate(m_SSL.get()), X509_free);
}
void TlsStream::Handshake(void)
{
ASSERT(!OwnsLock());
int rc;
ObjectLock olock(this);
while ((rc = SSL_do_handshake(m_SSL.get())) <= 0) {
switch (SSL_get_error(m_SSL.get(), rc)) {
case SSL_ERROR_WANT_READ:
olock.Unlock();
m_InnerStream->WaitReadable(1);
olock.Lock();
continue;
case SSL_ERROR_WANT_WRITE:
olock.Unlock();
m_InnerStream->WaitWritable(1);
olock.Lock();
continue;
case SSL_ERROR_ZERO_RETURN:
Close();
return;
default:
I2Stream_check_exception(m_BIO);
BOOST_THROW_EXCEPTION(openssl_error()
<< boost::errinfo_api_function("SSL_read")
<< errinfo_openssl_error(ERR_get_error()));
}
}
}
/**
* Processes data for the stream.
*/
size_t TlsStream::Read(void *buffer, size_t count)
{
ASSERT(!OwnsLock());
size_t left = count;
ObjectLock olock(this);
while (left > 0) {
int rc = SSL_read(m_SSL.get(), ((char *)buffer) + (count - left), left);
if (rc <= 0) {
switch (SSL_get_error(m_SSL.get(), rc)) {
case SSL_ERROR_WANT_READ:
olock.Unlock();
m_InnerStream->WaitReadable(1);
olock.Lock();
continue;
case SSL_ERROR_WANT_WRITE:
olock.Unlock();
m_InnerStream->WaitWritable(1);
olock.Lock();
continue;
case SSL_ERROR_ZERO_RETURN:
Close();
return count - left;
default:
I2Stream_check_exception(m_BIO);
BOOST_THROW_EXCEPTION(openssl_error()
<< boost::errinfo_api_function("SSL_read")
<< errinfo_openssl_error(ERR_get_error()));
}
}
left -= rc;
}
return count;
}
void TlsStream::Write(const void *buffer, size_t count)
{
ASSERT(!OwnsLock());
size_t left = count;
ObjectLock olock(this);
while (left > 0) {
int rc = SSL_write(m_SSL.get(), ((const char *)buffer) + (count - left), left);
if (rc <= 0) {
switch (SSL_get_error(m_SSL.get(), rc)) {
case SSL_ERROR_WANT_READ:
olock.Unlock();
m_InnerStream->WaitReadable(1);
olock.Lock();
continue;
case SSL_ERROR_WANT_WRITE:
olock.Unlock();
m_InnerStream->WaitWritable(1);
olock.Lock();
continue;
case SSL_ERROR_ZERO_RETURN:
Close();
return;
default:
I2Stream_check_exception(m_BIO);
BOOST_THROW_EXCEPTION(openssl_error()
<< boost::errinfo_api_function("SSL_write")
<< errinfo_openssl_error(ERR_get_error()));
}
}
left -= rc;
}
}
/**
* Closes the stream.
*/
void TlsStream::Close(void)
{
m_InnerStream->Close();
}
bool TlsStream::IsEof(void) const
{
return m_InnerStream->IsEof();
}