release/src/router/nettle/examples/read_rsa_key.c

   1 /* Used by the rsa example programs. */
   2
   3 /* nettle, low-level cryptographics library
   4  *
   5  * Copyright (C) 2002, 2007 Niels Möller
   6  *
   7  * The nettle library is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU Lesser General Public License as published by
   9  * the Free Software Foundation; either version 2.1 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * The nettle library is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with the nettle library; see the file COPYING.LIB.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  20  * MA 02111-1301, USA.
  21  */
  22
  23 #if HAVE_CONFIG_H
  24 # include "config.h"
  25 #endif
  26
  27 #include <stdlib.h>
  28
  29 #include "io.h"
  30 #include "rsa.h"
  31
  32 /* Split out from io.c, since it depends on hogweed. */
  33 int
  34 read_rsa_key(const char *name,
  35              struct rsa_public_key *pub,
  36              struct rsa_private_key *priv)
  37 {
  38   unsigned length;
  39   char *buffer;
  40   int res;
  41
  42   length = read_file(name, 0, &buffer);
  43   if (!length)
  44     return 0;
  45
  46   res = rsa_keypair_from_sexp(pub, priv, 0, length, buffer);
  47   free(buffer);
  48
  49   return res;
  50 }