text: /*
      cipher.h -- header file cipher.c
      Copyright (C) 2007-2016 Guus Sliepen <guus@tinc-vpn.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 of the License, 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 program; if not, write to the Free Software Foundation, Inc.,
      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
  
  #ifndef __TINC_CIPHER_H__
  #define __TINC_CIPHER_H__
  
  #define CIPHER_MAX_BLOCK_SIZE 32
  #define CIPHER_MAX_IV_SIZE 16
  #define CIPHER_MAX_KEY_SIZE 32
  
  #ifndef DISABLE_LEGACY
  
  typedef struct cipher cipher_t;
  
  extern cipher_t *cipher_open_by_name(const char *) __attribute__ ((__malloc__));
  extern cipher_t *cipher_open_by_nid(int) __attribute__ ((__malloc__));
  extern void cipher_close(cipher_t *);
  extern size_t cipher_keylength(const cipher_t *);
  extern size_t cipher_blocksize(const cipher_t *);
  extern uint64_t cipher_budget(const cipher_t *);
  extern void cipher_get_key(const cipher_t *, void *);
  extern bool cipher_set_key(cipher_t *, void *, bool) __attribute__ ((__warn_unused_result__));
  extern bool cipher_set_key_from_rsa(cipher_t *, void *, size_t, bool) __attribute__ ((__warn_unused_result__));
  extern bool cipher_encrypt(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen, bool oneshot) __attribute__ ((__warn_unused_result__));
  extern bool cipher_decrypt(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen, bool oneshot) __attribute__ ((__warn_unused_result__));
  extern int cipher_get_nid(const cipher_t *);
  extern bool cipher_active(const cipher_t *);
  
  #endif
  
  #endif
  