Line data    Source code

       1             : /*
       2             : *                       GPAC - Multimedia Framework C SDK
       3             : *
       4             : *                       Authors: Jean Le Feuvre
       5             : *                       Copyright (c) Telecom ParisTech 2000-2018
       6             : *                                       All rights reserved
       7             : *
       8             : *  This file is part of GPAC / crypto lib sub-project
       9             : *
      10             : *  GPAC is free software; you can redistribute it and/or modify
      11             : *  it under the terms of the GNU Lesser General Public License as published by
      12             : *  the Free Software Foundation; either version 2, or (at your option)
      13             : *  any later version.
      14             : *
      15             : *  GPAC is distributed in the hope that it will be useful,
      16             : *  but WITHOUT ANY WARRANTY; without even the implied warranty of
      17             : *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      18             : *  GNU Lesser General Public License for more details.
      19             : *
      20             : *  You should have received a copy of the GNU Lesser General Public
      21             : *  License along with this library; see the file COPYING.  If not, write to
      22             : *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
      23             : *
      24             : */
      25             : 
      26             : #include <gpac/internal/crypt_dev.h>
      27             : 
      28             : GF_EXPORT
      29         521 : GF_Crypt *gf_crypt_open(GF_CRYPTO_ALGO algorithm, GF_CRYPTO_MODE mode)
      30             : {
      31             :         GF_Crypt *td;
      32             :         GF_Err e;
      33             : 
      34         521 :         GF_SAFEALLOC(td, GF_Crypt);
      35         521 :         if (td == NULL) return NULL;
      36             : 
      37             : #ifdef GPAC_HAS_SSL
      38         521 :         e = gf_crypt_open_open_openssl(td, mode);
      39             : #else
      40             :         e = gf_crypt_open_open_tinyaes(td, mode);
      41             : #endif
      42             : 
      43         521 :         if (e != GF_OK) {
      44           0 :                 gf_free(td);
      45           0 :                 return NULL;
      46             :         }
      47             :         return td;
      48             : }
      49             : 
      50             : GF_EXPORT
      51         521 : void gf_crypt_close(GF_Crypt *td)
      52             : {
      53         521 :         if (!td) return;
      54         521 :         td->_deinit_crypt(td);
      55         521 :         gf_free(td->context);
      56         521 :         gf_free(td);
      57             : }
      58             : 
      59             : GF_EXPORT
      60         172 : GF_Err gf_crypt_set_key(GF_Crypt *td, void *key)
      61             : {
      62         172 :         td->_set_key(td, key);
      63         172 :         return GF_OK;
      64             : }
      65             : 
      66             : GF_EXPORT
      67       48314 : GF_Err gf_crypt_set_IV(GF_Crypt *td, const void *iv, u32 size)
      68             : {
      69       48314 :         if (!td) return GF_BAD_PARAM;
      70       48314 :         return td->_set_state(td, (void *)iv, size);
      71             : }
      72             : 
      73       23717 : GF_Err gf_crypt_get_IV(GF_Crypt *td, void *iv, u32 *size)
      74             : {
      75       23717 :         if (!td) return GF_BAD_PARAM;
      76       23717 :         return td->_get_state(td, iv, size);
      77             : }
      78             : 
      79             : 
      80             : GF_EXPORT
      81         682 : GF_Err gf_crypt_init(GF_Crypt *td, void *key, const void *IV)
      82             : {
      83             :         GF_Err e;
      84             : 
      85         682 :         e = td->_init_crypt(td, key, IV);
      86         682 :         if (e != GF_OK) gf_crypt_close(td);
      87             :         //need for openssl we have 2 passes init
      88         682 :         td->_set_key(td, key);
      89         682 :         return e;
      90             : }
      91             : 
      92             : GF_EXPORT
      93       87044 : GF_Err gf_crypt_encrypt(GF_Crypt *td, void *plaintext, u32 len)
      94             : {
      95       87044 :         if (!td) return GF_BAD_PARAM;
      96       87044 :         return td->_crypt(td, plaintext, len);
      97             : }
      98             : 
      99             : GF_EXPORT
     100       75346 : GF_Err gf_crypt_decrypt(GF_Crypt *td, void *ciphertext, u32 len)
     101             : {
     102       75346 :         if (!td) return GF_BAD_PARAM;
     103       75346 :         if (!len) return GF_OK;
     104       69822 :         return td->_decrypt(td, ciphertext, len);
     105             : }