/*
 * $Id$
 */

/*
 * Harbour Project source code:
 * OpenSSL API (PEM) - Harbour interface.
 *
 * Copyright 2009 Viktor Szakats (harbour syenar.net)
 * www - http://harbour-project.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, 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 software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries with other
 * files to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

#include "hbapi.h"
#include "hbapierr.h"
#include "hbapiitm.h"
#include "hbvm.h"

#include "hbssl.h"

/* ---------------------------------------------------------------------------- */
/* Callback */

static int hb_ssl_pem_password_cb( char * buf, int size, int rwflag, void * userdata )
{
   int retsize = 0;

   if( size > 0 && userdata && hb_vmRequestReenter() )
   {
      hb_vmPushEvalSym();
      hb_vmPush( ( PHB_ITEM ) userdata );
      hb_vmPushLogical( rwflag );
      hb_vmSend( 1 );

      buf[ 0 ] = '\0';

      retsize = ( int ) hb_parclen( -1 );

      if( retsize > 0 )
      {
         if( retsize > size )
            retsize = size;

         memcpy( buf, hb_parc( -1 ), retsize );
      }

      hb_vmRequestRestore();
   }

   return retsize;
}

HB_FUNC( ERR_LOAD_PEM_STRINGS )
{
   ERR_load_PEM_strings();
}

typedef void * PEM_READ_BIO(  BIO * bp, void ** x, pem_password_cb * cb, void * u );
typedef void * PEM_WRITE_BIO( BIO * bp, void ** x, pem_password_cb * cb, void * u );

static void hb_PEM_read_bio( PEM_READ_BIO * func )
{
   BIO * bio;

   if( HB_ISPOINTER( 1 ) )
      bio = ( BIO * ) hb_parptr( 1 );
   else if( HB_ISCHAR( 1 ) )
      bio = BIO_new_file( hb_parc( 1 ), "r" );
   else if( HB_ISNUM( 1 ) )
      bio = BIO_new_fd( hb_parni( 1 ), BIO_NOCLOSE );
   else
      bio = NULL;

   if( bio )
   {
      PHB_ITEM pPassCallback = hb_param( 2, HB_IT_BLOCK | HB_IT_SYMBOL );

      if( pPassCallback )
      {
         hb_retptr( ( * func )( bio, NULL, hb_ssl_pem_password_cb, pPassCallback ) );
      }
      else
      {
         /* NOTE: Dropping 'const' qualifier. [vszakats] */
         hb_retptr( ( * func )( bio, NULL, NULL, ( void * ) hb_parc( 2 ) ) );
      }

      if( ! HB_ISPOINTER( 1 ) )
         BIO_free( bio );
   }
   else
      hb_errRT_BASE( EG_ARG, 2010, NULL, HB_ERR_FUNCNAME, HB_ERR_ARGS_BASEPARAMS );
}

HB_FUNC( PEM_READ_BIO_PRIVATEKEY    ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_PrivateKey    ); }
HB_FUNC( PEM_READ_BIO_PUBKEY        ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_PUBKEY        ); }
HB_FUNC( PEM_READ_BIO_RSAPRIVATEKEY ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_RSAPrivateKey ); }
HB_FUNC( PEM_READ_BIO_RSAPUBLICKEY  ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_RSAPublicKey  ); }
HB_FUNC( PEM_READ_BIO_RSA_PUBKEY    ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_RSA_PUBKEY    ); }
HB_FUNC( PEM_READ_BIO_DSAPRIVATEKEY ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_DSAPrivateKey ); }
HB_FUNC( PEM_READ_BIO_DSA_PUBKEY    ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_DSA_PUBKEY    ); }
HB_FUNC( PEM_READ_BIO_DSAPARAMS     ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_DSAparams     ); }
HB_FUNC( PEM_READ_BIO_DHPARAMS      ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_DHparams      ); }
HB_FUNC( PEM_READ_BIO_X509          ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_X509          ); }
HB_FUNC( PEM_READ_BIO_X509_AUX      ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_X509_AUX      ); }
HB_FUNC( PEM_READ_BIO_X509_REQ      ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_X509_REQ      ); }
HB_FUNC( PEM_READ_BIO_X509_CRL      ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_X509_CRL      ); }
HB_FUNC( PEM_READ_BIO_PKCS7         ) { hb_PEM_read_bio( ( PEM_READ_BIO * ) PEM_read_bio_PKCS7         ); }

#if 0

int        PEM_write_bio_RSAPrivateKey(      BIO *bp, RSA      *x, const EVP_CIPHER *enc, unsigned char *kstr, int klen, pem_password_cb *cb, void *u);
int        PEM_write_bio_DSAPrivateKey(      BIO *bp, DSA      *x, const EVP_CIPHER *enc, unsigned char *kstr, int klen, pem_password_cb *cb, void *u);
int        PEM_write_bio_PrivateKey(         BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc, unsigned char *kstr, int klen, pem_password_cb *cb, void *u);
int        PEM_write_bio_PKCS8PrivateKey(    BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc, char *kstr         , int klen, pem_password_cb *cb, void *u);
int        PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, EVP_PKEY *x, int nid              , char *kstr         , int klen, pem_password_cb *cb, void *u);
int        PEM_write_bio_PUBKEY(             BIO *bp, EVP_PKEY *x);
int        PEM_write_bio_RSAPublicKey(       BIO *bp, RSA *x);
int        PEM_write_bio_RSA_PUBKEY(         BIO *bp, RSA *x);
int        PEM_write_bio_DSA_PUBKEY(         BIO *bp, DSA *x);
int        PEM_write_bio_DSAparams(          BIO *bp, DSA *x);
int        PEM_write_bio_DHparams(           BIO *bp, DH *x);
int        PEM_write_bio_X509(               BIO *bp, X509 *x);
int        PEM_write_bio_X509_AUX(           BIO *bp, X509 *x);
int        PEM_write_bio_X509_REQ(           BIO *bp, X509_REQ *x);
int        PEM_write_bio_X509_REQ_NEW(       BIO *bp, X509_REQ *x);
int        PEM_write_bio_X509_CRL(           BIO *bp, X509_CRL *x);
int        PEM_write_bio_PKCS7(              BIO *bp, PKCS7 *x);

#endif