CATLSClientSocket.cpp

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/*
Copyright (c) 2000, The JAP-Team
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

  - Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer.

  - Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation and/or
    other materials provided with the distribution.

  - Neither the name of the University of Technology Dresden, Germany nor the names of its contributors
    may be used to endorse or promote products derived from this software without specific
    prior written permission.


THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
*/
#include "StdAfx.h"
#ifndef ONLY_LOCAL_PROXY
#ifdef PAYMENT
#include "CATLSClientSocket.hpp"
#include "CAUtil.hpp"
#include "CAMsg.hpp"

CATLSClientSocket::CATLSClientSocket()
  {
    m_bConnectedTLS = false;
    m_pCtx = SSL_CTX_new( TLSv1_client_method() );
#ifdef SSL_OP_NO_TICKET
    // disable buggy TLS client extensions, as otherwise we will get no connection to a Java TLS server; the bug is fixes in OpenSSL > 0.9.8g
    SSL_CTX_set_options(m_pCtx, SSL_OP_ALL|SSL_OP_NO_TICKET);
#else
    SSL_CTX_set_options(m_pCtx, SSL_OP_ALL);
#endif
    m_pSSL = NULL;
    m_pRootCert=NULL;
    //m_pSocket=new CASocket();

  }

CATLSClientSocket::~CATLSClientSocket()
  {
    close();
    SSL_CTX_free(m_pCtx);
    //delete m_pSocket;
    //m_pSocket = NULL;
    delete m_pRootCert;
    m_pRootCert = NULL;
  }

SINT32 CATLSClientSocket::close()
  {
    if(m_bConnectedTLS)
      {
        SSL_shutdown(m_pSSL);
        m_bConnectedTLS = false;
      }
    if(m_pSSL!=NULL)
      {
        SSL_free(m_pSSL);
      }
    m_pSSL=NULL;
    return CASocket::close();
  }




SINT32 CATLSClientSocket::setServerCertificate(CACertificate* pCert)
  {
    m_pRootCert=pCert->clone();
    return E_SUCCESS;
  }


SINT32 CATLSClientSocket::doTLSConnect(CASocketAddr &psa)
  {
    SINT32 status;
    #ifdef DEBUG
      CAMsg::printMsg(LOG_DEBUG,"starting tls connect\n");
    #endif
    if(m_bConnectedTLS)
      return E_UNKNOWN;

    m_pSSL=SSL_new(m_pCtx);
    // do the standard part of the ssl handshake
    
    SSL_set_fd( m_pSSL, m_Socket );
    if((status = SSL_connect( m_pSSL )) != 1) 
    {
        int err = SSL_get_error(m_pSSL, status);
        CAMsg::printMsg(LOG_INFO,"CATLSClientSocket::doTLSConnect() failed! Reason: %i\n", err);
      SSL_shutdown(m_pSSL);
      close();
      m_bConnectedTLS = false;
      return E_UNKNOWN;
    }
    #ifdef DEBUG
      CAMsg::printMsg(LOG_DEBUG,"connect passed\n");
    #endif

    // ssl handshake ok, now let's check the server's identity
    // Note: This code was stolen from LinuxJournal
    // issue 89: An Introduction to OpenSSL Programming, Part I of II


    // is the certificate valid?
    SINT32 ret=SSL_get_verify_result( m_pSSL );
    if(ret != X509_V_OK&&ret!=X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT )
      {
        CAMsg::printMsg(LOG_ERR, "SSLClientSocket: the Server certificate is INVALID!! Error: %i\n",ret);
        close();
        m_bConnectedTLS = false;
        return E_UNKNOWN;
      }
    X509* peerCert=SSL_get_peer_certificate(m_pSSL);
    if(peerCert==NULL)
      {
        CAMsg::printMsg(LOG_ERR, "SSLClientSocket: the Server shows no certificate!\n");
        close();
        m_bConnectedTLS = false;
        return E_UNKNOWN;
      }
    ret=1;
    if(m_pRootCert!=NULL)
      {
        EVP_PKEY* pubKey=X509_get_pubkey(m_pRootCert->getX509());
        ret=X509_verify(peerCert,pubKey);
      }
    X509_free(peerCert);
    if(ret!=1)
      {
        CAMsg::printMsg(LOG_ERR, "SSLClientSocket: could not verify server certificate!\n");
        close();
        m_bConnectedTLS = false;
        return E_UNKNOWN;
      }
    m_bConnectedTLS = true;
    return E_SUCCESS;
  }




SINT32 CATLSClientSocket::connect(CASocketAddr & psa, UINT32 msTimeout)
  {
    SINT32 rc;
    // call base class connect function
    if( (rc=CASocket::connect(psa, msTimeout)) != E_SUCCESS)
    {
      CASocket::close();
      return rc;
    }
    // do our own connection initialisation (TLS handshake)
    rc = doTLSConnect(psa);
    return rc;
  }

SINT32 CATLSClientSocket::send(const UINT8* buff,UINT32 len)
{
  if(len==0)
  {
    return E_SUCCESS; //nothing to send
  }
  SINT32 ret=::SSL_write(m_pSSL,(char*)buff,len);
  if(ret<0)
  {
      int err = SSL_get_error(m_pSSL, ret);
    if ( (SSL_ERROR_WANT_READ == err) ||
       (SSL_ERROR_WANT_WRITE == err) )
      {
        return E_AGAIN;
      }

    if( (err == SSL_ERROR_SYSCALL) && (ret == -1) )
    {
      int errnum = errno;
      CAMsg::printMsg(LOG_ERR, "TLS-Socket: send I/O error occured: %s\n", strerror(errnum));
    }
    return SOCKET_ERROR;
  }
  return ret;
}

SINT32 CATLSClientSocket::sendFully(const UINT8* buff, UINT32 len)
  {
    if(len==0)
      return E_SUCCESS; //nothing to send
    SINT32 ret=::SSL_write(m_pSSL,(char*)buff,len);
    if(ret < 0 || ret < len)
      return E_UNKNOWN;
    return E_SUCCESS;
  }


SINT32 CATLSClientSocket::receive(UINT8* buff,UINT32 len)
{
  SINT32 ret=::SSL_read(m_pSSL,(char*)buff,len);
  if(ret<0)
    {
      int err = SSL_get_error(m_pSSL, ret);
    if ( (SSL_ERROR_WANT_READ == err) ||
       (SSL_ERROR_WANT_WRITE == err) )
      {
        return E_AGAIN;
      }

    if( (err == SSL_ERROR_SYSCALL) && (ret == -1) )
    {
      int errnum = errno;
      CAMsg::printMsg(LOG_ERR, "TLS-Socket: receive I/O error occured: %s\n", strerror(errnum));
    }
    return SOCKET_ERROR;
    }
  return ret;
}

#endif
#endif //ONLY_LOCAL_PROXY