release/src/router/nettle/dsa2sexp.c

   1 /* dsa2sexp.c
   2  *
   3  */
   4
   5 /* nettle, low-level cryptographics library
   6  *
   7  * Copyright (C) 2002, 2009 Niels Möller, Magnus Holmgren
   8  *
   9  * The nettle library is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or (at your
  12  * option) any later version.
  13  *
  14  * The nettle library is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  16  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  17  * License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with the nettle library; see the file COPYING.LIB.  If not, write to
  21  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  22  * MA 02111-1301, USA.
  23  */
  24
  25 #if HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include "dsa.h"
  30
  31 #include "sexp.h"
  32
  33 int
  34 dsa_keypair_to_sexp(struct nettle_buffer *buffer,
  35                     const char *algorithm_name,
  36                     const struct dsa_public_key *pub,
  37                     const struct dsa_private_key *priv)
  38 {
  39   if (!algorithm_name)
  40     algorithm_name = "dsa";
  41
  42   if (priv)
  43     return sexp_format(buffer,
  44                        "(private-key(%0s(p%b)(q%b)"
  45                        "(g%b)(y%b)(x%b)))",
  46                        algorithm_name, pub->p, pub->q,
  47                        pub->g, pub->y, priv->x);
  48   else
  49     return sexp_format(buffer,
  50                        "(public-key(%0s(p%b)(q%b)"
  51                        "(g%b)(y%b)))",
  52                        algorithm_name, pub->p, pub->q,
  53                        pub->g, pub->y);
  54 }