2 This file is part of GNUnet.
3 (C) 2012 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file util/gnunet-ecc.c
23 * @brief tool to manipulate ECC key files
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
28 #include "gnunet_testing_lib-new.h"
33 * Flag for printing public key.
35 static int print_public_key;
38 * Flag for printing hash of public key.
40 static int print_peer_identity;
43 * Flag for printing short hash of public key.
45 static int print_short_identity;
48 * Use weak random number generator for key generation.
50 static int weak_random;
53 * Option set to create a bunch of keys at once.
55 static unsigned int make_keys;
58 * The private information of an ECC key pair.
59 * NOTE: this must match the definition in crypto_ksk.c and crypto_ecc.c!
61 struct GNUNET_CRYPTO_EccPrivateKey
68 * Create a new private key. Caller must free return value.
70 * @return fresh private key
72 static struct GNUNET_CRYPTO_EccPrivateKey *
75 struct GNUNET_CRYPTO_EccPrivateKey *ret;
77 gcry_sexp_t s_keyparam;
80 gcry_sexp_build (&s_keyparam, NULL,
81 "(genkey(ecc(nbits %d)(ecc-use-e 3:257)))",
83 GNUNET_assert (0 == gcry_pk_genkey (&s_key, s_keyparam));
84 gcry_sexp_release (s_keyparam);
86 GNUNET_assert (0 == gcry_pk_testkey (s_key));
88 ret = GNUNET_malloc (sizeof (struct GNUNET_CRYPTO_EccPrivateKey));
95 * Create a flat file with a large number of key pairs for testing.
98 create_keys (const char *fn)
101 struct GNUNET_CRYPTO_EccPrivateKey *pk;
102 struct GNUNET_CRYPTO_EccPrivateKeyBinaryEncoded *enc;
104 if (NULL == (f = fopen (fn, "w+")))
107 _("Failed to open `%s': %s\n"),
113 _("Generating %u keys, please wait"),
115 while (0 < make_keys--)
119 if (NULL == (pk = ecc_key_create ()))
124 enc = GNUNET_CRYPTO_ecc_encode_key (pk);
125 if (htons (enc->size) != fwrite (enc, 1, htons (enc->size), f))
128 _("\nFailed to write to `%s': %s\n"),
131 GNUNET_CRYPTO_ecc_key_free (pk);
135 GNUNET_CRYPTO_ecc_key_free (pk);
146 * Main function that will be run by the scheduler.
149 * @param args remaining command-line arguments
150 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
151 * @param cfg configuration
154 run (void *cls, char *const *args, const char *cfgfile,
155 const struct GNUNET_CONFIGURATION_Handle *cfg)
157 struct GNUNET_CRYPTO_EccPrivateKey *pk;
158 struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded pub;
159 struct GNUNET_PeerIdentity pid;
163 fprintf (stderr, _("No hostkey file specified on command line\n"));
166 if (0 != weak_random)
167 GNUNET_CRYPTO_random_disable_entropy_gathering ();
170 create_keys (args[0]);
173 pk = GNUNET_CRYPTO_ecc_key_create_from_file (args[0]);
176 if (print_public_key)
180 GNUNET_CRYPTO_ecc_key_get_public (pk, &pub);
181 s = GNUNET_CRYPTO_ecc_public_key_to_string (&pub);
182 fprintf (stdout, "%s\n", s);
185 if (print_peer_identity)
187 struct GNUNET_CRYPTO_HashAsciiEncoded enc;
189 GNUNET_CRYPTO_ecc_key_get_public (pk, &pub);
190 GNUNET_CRYPTO_hash (&pub, sizeof (pub), &pid.hashPubKey);
191 GNUNET_CRYPTO_hash_to_enc (&pid.hashPubKey, &enc);
192 fprintf (stdout, "%s\n", enc.encoding);
194 if (print_short_identity)
196 struct GNUNET_CRYPTO_ShortHashAsciiEncoded enc;
197 struct GNUNET_CRYPTO_ShortHashCode sh;
199 GNUNET_CRYPTO_ecc_key_get_public (pk, &pub);
200 GNUNET_CRYPTO_short_hash (&pub, sizeof (pub), &sh);
201 GNUNET_CRYPTO_short_hash_to_enc (&sh, &enc);
202 fprintf (stdout, "%s\n", enc.short_encoding);
204 GNUNET_CRYPTO_ecc_key_free (pk);
209 * Program to manipulate ECC key files.
211 * @param argc number of arguments from the command line
212 * @param argv command line arguments
213 * @return 0 ok, 1 on error
216 main (int argc, char *const *argv)
218 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
219 { 'g', "generate-keys", "COUNT",
220 gettext_noop ("create COUNT public-private key pairs (for testing)"),
221 1, &GNUNET_GETOPT_set_uint, &make_keys },
222 { 'p', "print-public-key", NULL,
223 gettext_noop ("print the public key in ASCII format"),
224 0, &GNUNET_GETOPT_set_one, &print_public_key },
225 { 'P', "print-peer-identity", NULL,
226 gettext_noop ("print the hash of the public key in ASCII format"),
227 0, &GNUNET_GETOPT_set_one, &print_peer_identity },
228 { 's', "print-short-identity", NULL,
229 gettext_noop ("print the short hash of the public key in ASCII format"),
230 0, &GNUNET_GETOPT_set_one, &print_short_identity },
231 { 'w', "weak-random", NULL,
232 gettext_noop ("use insecure, weak random number generator for key generation (for testing only)"),
233 0, &GNUNET_GETOPT_set_one, &weak_random },
234 GNUNET_GETOPT_OPTION_END
238 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
242 GNUNET_PROGRAM_run (argc, argv, "gnunet-ecc [OPTIONS] keyfile",
243 gettext_noop ("Manipulate GNUnet private ECC key files"),
244 options, &run, NULL)) ? 0 : 1;
245 GNUNET_free ((void*) argv);
249 /* end of gnunet-ecc.c */