/*
  Copyright (c) 2005-2007 by Jakob Schroeter <js@camaya.net>
  This file is part of the gloox library. http://camaya.net/gloox

  This software is distributed under a license. The full license
  agreement can be found in the file LICENSE in this distribution.
  This software may not be copied, modified, sold or distributed
  other than expressed in the named license agreement.

  This software is distributed without any warranty.
*/



#include "tlsgnutlsserveranon.h"

#ifdef HAVE_GNUTLS

#include <errno.h>

namespace gloox
{

  GnuTLSServerAnon::GnuTLSServerAnon( TLSHandler *th )
    : GnuTLSBase( th ), m_dhBits( 1024 )
  {
    init();
  }

  GnuTLSServerAnon::~GnuTLSServerAnon()
  {
    gnutls_anon_free_server_credentials( m_anoncred );
    gnutls_dh_params_deinit( m_dhParams );
  }

  void GnuTLSServerAnon::cleanup()
  {
    GnuTLSBase::cleanup();
    init();
  }

  void GnuTLSServerAnon::init()
  {
    const int protocolPriority[] = { GNUTLS_TLS1, 0 };
    const int kxPriority[]       = { GNUTLS_KX_ANON_DH, 0 };
    const int cipherPriority[]   = { GNUTLS_CIPHER_AES_256_CBC, GNUTLS_CIPHER_AES_128_CBC,
                                     GNUTLS_CIPHER_3DES_CBC, GNUTLS_CIPHER_ARCFOUR, 0 };
    const int compPriority[]     = { GNUTLS_COMP_ZLIB, GNUTLS_COMP_NULL, 0 };
    const int macPriority[]      = { GNUTLS_MAC_SHA, GNUTLS_MAC_MD5, 0 };

    if( gnutls_global_init() != 0 )
      return;

    if( gnutls_anon_allocate_server_credentials( &m_anoncred ) < 0 )
      return;

    generateDH();
    gnutls_anon_set_server_dh_params( m_anoncred, m_dhParams );

    if( gnutls_init( m_session, GNUTLS_SERVER ) != 0 )
      return;

    gnutls_protocol_set_priority( *m_session, protocolPriority );
    gnutls_cipher_set_priority( *m_session, cipherPriority );
    gnutls_compression_set_priority( *m_session, compPriority );
    gnutls_kx_set_priority( *m_session, kxPriority );
    gnutls_mac_set_priority( *m_session, macPriority );
    gnutls_credentials_set( *m_session, GNUTLS_CRD_ANON, m_anoncred );

    gnutls_dh_set_prime_bits( *m_session, m_dhBits );

    gnutls_transport_set_ptr( *m_session, (gnutls_transport_ptr_t)this );
    gnutls_transport_set_push_function( *m_session, pushFunc );
    gnutls_transport_set_pull_function( *m_session, pullFunc );
  }

  void GnuTLSServerAnon::generateDH()
  {
    gnutls_dh_params_init( &m_dhParams );
    gnutls_dh_params_generate2( m_dhParams, m_dhBits );
  }

  void GnuTLSServerAnon::getCertInfo()
  {
    m_certInfo.status = CertOk;

    const char* info;
    info = gnutls_compression_get_name( gnutls_compression_get( *m_session ) );
    if( info )
      m_certInfo.compression = info;

    info = gnutls_mac_get_name( gnutls_mac_get( *m_session ) );
    if( info )
      m_certInfo.mac = info;

    info = gnutls_cipher_get_name( gnutls_cipher_get( *m_session ) );
    if( info )
      m_certInfo.cipher = info;

    info = gnutls_protocol_get_name( gnutls_protocol_get_version( *m_session ) );
    if( info )
      m_certInfo.protocol = info;

    m_valid = true;
  }

}

#endif // HAVE_GNUTLS