/*

*     GPAC - Multimedia Framework C SDK

*

*     Authors: Jean Le Feuvre

*     Copyright (c) Telecom ParisTech 2000-2018

*         All rights reserved

*

*  This file is part of GPAC / crypto lib sub-project

*

*  GPAC is free software; you can redistribute it and/or modify

*  it under the terms of the GNU Lesser General Public License as published by

*  the Free Software Foundation; either version 2, or (at your option)

*  any later version.

*

*  GPAC 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 Lesser General Public License for more details.

*

*  You should have received a copy of the GNU Lesser General Public

*  License along with this library; see the file COPYING.  If not, write to

*  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

*

*/

#include <gpac/internal/crypt_dev.h>

GF_EXPORT

GF_Crypt *gf_crypt_open(GF_CRYPTO_ALGO algorithm, GF_CRYPTO_MODE mode)

{

  GF_Crypt *td;

  GF_Err e;

  GF_SAFEALLOC(td, GF_Crypt);

  if (td == NULL) return NULL;

#ifdef GPAC_HAS_SSL

  e = gf_crypt_open_open_openssl(td, mode);

#else

  e = gf_crypt_open_open_tinyaes(td, mode);

#endif

  if (e != GF_OK) {

    gf_free(td);

    return NULL;

  }

  return td;

}

GF_EXPORT

void gf_crypt_close(GF_Crypt *td)

{

  if (!td) return;

  td->_deinit_crypt(td);

  gf_free(td->context);

  gf_free(td);

}

GF_EXPORT

GF_Err gf_crypt_set_key(GF_Crypt *td, void *key)

{

  td->_set_key(td, key);

  return GF_OK;

}

GF_EXPORT

GF_Err gf_crypt_set_IV(GF_Crypt *td, const void *iv, u32 size)

{

  if (!td) return GF_BAD_PARAM;

  return td->_set_state(td, (void *)iv, size);

}

GF_EXPORT

GF_Err gf_crypt_get_IV(GF_Crypt *td, void *iv, u32 *size)

{

  if (!td) return GF_BAD_PARAM;

  return td->_get_state(td, iv, size);

}

GF_EXPORT

GF_Err gf_crypt_init(GF_Crypt *td, void *key, const void *IV)

{

  GF_Err e;

  e = td->_init_crypt(td, key, IV);

  if (e != GF_OK) gf_crypt_close(td);

  //need for openssl we have 2 passes init

  td->_set_key(td, key);

  return e;

}

GF_EXPORT

GF_Err gf_crypt_encrypt(GF_Crypt *td, void *plaintext, u32 len)

{

  if (!td) return GF_BAD_PARAM;

  return td->_crypt(td, plaintext, len);

}

GF_EXPORT

GF_Err gf_crypt_decrypt(GF_Crypt *td, void *ciphertext, u32 len)

{

  if (!td) return GF_BAD_PARAM;

  if (!len) return GF_OK;

  return td->_decrypt(td, ciphertext, len);

}