2 This file is part of GNUnet.
3 (C) 2012, 2013 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 EDDSA key files
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
28 #include "gnunet_testing_lib.h"
33 * Flag for listing public key.
38 * Flag for listing public key.
40 static int list_keys_count;
43 * Flag for printing public key.
45 static int print_public_key;
48 * Flag for printing the output of random example operations.
50 static int print_examples_flag;
53 * Flag for printing hash of public key.
55 static int print_peer_identity;
58 * Option set to create a bunch of keys at once.
60 static unsigned int make_keys;
64 * Create a flat file with a large number of key pairs for testing.
67 create_keys (const char *fn)
70 struct GNUNET_CRYPTO_EddsaPrivateKey *pk;
72 if (NULL == (f = fopen (fn, "w+")))
75 _("Failed to open `%s': %s\n"),
81 _("Generating %u keys, please wait"),
83 while (0 < make_keys--)
87 if (NULL == (pk = GNUNET_CRYPTO_eddsa_key_create ()))
92 if (GNUNET_TESTING_HOSTKEYFILESIZE !=
94 GNUNET_TESTING_HOSTKEYFILESIZE, f))
97 _("\nFailed to write to `%s': %s\n"),
105 if (UINT_MAX == make_keys)
110 _("\nError, %u keys not generated\n"), make_keys);
116 print_hex (char *msg, void *buf, size_t size)
119 printf ("%s: ", msg);
120 for (i = 0; i < size; i++)
122 printf ("%02hhx", ((char *)buf)[i]);
129 print_examples_ecdh ()
131 struct GNUNET_CRYPTO_EcdhePrivateKey *dh_priv1;
132 struct GNUNET_CRYPTO_EcdhePublicKey *dh_pub1;
133 struct GNUNET_CRYPTO_EcdhePrivateKey *dh_priv2;
134 struct GNUNET_CRYPTO_EcdhePublicKey *dh_pub2;
135 struct GNUNET_HashCode hash;
138 dh_pub1 = GNUNET_new (struct GNUNET_CRYPTO_EcdhePublicKey);
139 dh_priv1 = GNUNET_CRYPTO_ecdhe_key_create ();
140 dh_pub2 = GNUNET_new (struct GNUNET_CRYPTO_EcdhePublicKey);
141 dh_priv2 = GNUNET_CRYPTO_ecdhe_key_create ();
142 GNUNET_CRYPTO_ecdhe_key_get_public (dh_priv1, dh_pub1);
143 GNUNET_CRYPTO_ecdhe_key_get_public (dh_priv2, dh_pub2);
145 GNUNET_assert (NULL != GNUNET_STRINGS_data_to_string (dh_priv1, 32, buf, 128));
146 printf ("ECDHE key 1:\n");
147 printf ("private: %s\n", buf);
148 print_hex ("private(hex)", dh_priv1, sizeof *dh_priv1);
149 GNUNET_assert (NULL != GNUNET_STRINGS_data_to_string (dh_pub1, 32, buf, 128));
150 printf ("public: %s\n", buf);
151 print_hex ("public(hex)", dh_pub1, sizeof *dh_pub1);
153 GNUNET_assert (NULL != GNUNET_STRINGS_data_to_string (dh_priv2, 32, buf, 128));
154 printf ("ECDHE key 2:\n");
155 printf ("private: %s\n", buf);
156 print_hex ("private(hex)", dh_priv2, sizeof *dh_priv2);
157 GNUNET_assert (NULL != GNUNET_STRINGS_data_to_string (dh_pub2, 32, buf, 128));
158 printf ("public: %s\n", buf);
159 print_hex ("public(hex)", dh_pub2, sizeof *dh_pub2);
161 GNUNET_assert (GNUNET_OK == GNUNET_CRYPTO_ecc_ecdh (dh_priv1, dh_pub2, &hash));
162 GNUNET_assert (NULL != GNUNET_STRINGS_data_to_string (&hash, 64, buf, 128));
163 printf ("ECDH shared secret: %s\n", buf);
165 GNUNET_free (dh_priv1);
166 GNUNET_free (dh_priv2);
167 GNUNET_free (dh_pub1);
168 GNUNET_free (dh_pub2);
173 * Print some random example operations to stdout.
178 print_examples_ecdh ();
179 // print_examples_ecdsa ();
180 // print_examples_eddsa ();
185 print_key (const char *filename)
187 struct GNUNET_DISK_FileHandle *fd;
188 struct GNUNET_CRYPTO_EddsaPrivateKey private_key;
189 struct GNUNET_CRYPTO_EddsaPublicKey public_key;
193 unsigned int total_hostkeys;
196 if (GNUNET_YES != GNUNET_DISK_file_test (filename))
199 _("Hostkeys file `%s' not found\n"),
204 /* Check hostkey file size, read entire thing into memory */
205 if (GNUNET_OK != GNUNET_DISK_file_size (filename, &fs, GNUNET_YES, GNUNET_YES))
210 _("Hostkeys file `%s' is empty\n"),
212 return; /* File is empty */
214 if (0 != (fs % GNUNET_TESTING_HOSTKEYFILESIZE))
217 _("Incorrect hostkey file format: %s\n"),
221 fd = GNUNET_DISK_file_open (filename, GNUNET_DISK_OPEN_READ,
222 GNUNET_DISK_PERM_NONE);
225 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", filename);
228 hostkeys_data = GNUNET_malloc (fs);
229 if (fs != GNUNET_DISK_file_read (fd, hostkeys_data, fs))
232 _("Could not read hostkey file: %s\n"),
234 GNUNET_free (hostkeys_data);
235 GNUNET_DISK_file_close (fd);
238 GNUNET_DISK_file_close (fd);
240 if (NULL == hostkeys_data)
242 total_hostkeys = fs / GNUNET_TESTING_HOSTKEYFILESIZE;
243 for (c = 0; (c < total_hostkeys) && (c < list_keys_count); c++)
245 memcpy (&private_key,
246 hostkeys_data + (c * GNUNET_TESTING_HOSTKEYFILESIZE),
247 GNUNET_TESTING_HOSTKEYFILESIZE);
248 GNUNET_CRYPTO_eddsa_key_get_public (&private_key, &public_key);
249 hostkey_str = GNUNET_CRYPTO_eddsa_public_key_to_string (&public_key);
250 if (NULL != hostkey_str)
252 fprintf (stderr, "%4u: %s\n", c, hostkey_str);
253 GNUNET_free (hostkey_str);
256 fprintf (stderr, "%4u: %s\n", c, "invalid");
258 GNUNET_free (hostkeys_data);
263 * Main function that will be run by the scheduler.
266 * @param args remaining command-line arguments
267 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
268 * @param cfg configuration
271 run (void *cls, char *const *args, const char *cfgfile,
272 const struct GNUNET_CONFIGURATION_Handle *cfg)
274 if (print_examples_flag)
283 _("No hostkey file specified on command line\n"));
293 create_keys (args[0]);
296 if (print_public_key)
298 struct GNUNET_CRYPTO_EddsaPrivateKey *pk;
299 struct GNUNET_CRYPTO_EddsaPublicKey pub;
302 pk = GNUNET_CRYPTO_eddsa_key_create_from_file (args[0]);
305 GNUNET_CRYPTO_eddsa_key_get_public (pk, &pub);
306 s = GNUNET_CRYPTO_eddsa_public_key_to_string (&pub);
313 if (print_peer_identity)
316 struct GNUNET_DISK_FileHandle *keyfile;
317 struct GNUNET_CRYPTO_EddsaPrivateKey pk;
318 struct GNUNET_CRYPTO_EddsaPublicKey pub;
320 keyfile = GNUNET_DISK_file_open (args[0], GNUNET_DISK_OPEN_READ,
321 GNUNET_DISK_PERM_NONE);
324 while (sizeof (pk) == GNUNET_DISK_file_read (keyfile, &pk, sizeof (pk)))
326 GNUNET_CRYPTO_eddsa_key_get_public (&pk, &pub);
327 str = GNUNET_CRYPTO_eddsa_public_key_to_string (&pub);
328 FPRINTF (stdout, "%s\n", str);
337 * Program to manipulate ECC key files.
339 * @param argc number of arguments from the command line
340 * @param argv command line arguments
341 * @return 0 ok, 1 on error
344 main (int argc, char *const *argv)
346 list_keys_count = UINT32_MAX;
347 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
348 { 'i', "iterate", "FILE",
349 gettext_noop ("list keys included in a file (for testing)"),
350 0, &GNUNET_GETOPT_set_one, &list_keys },
351 { 'e', "end=", "COUNT",
352 gettext_noop ("number of keys to list included in a file (for testing)"),
353 1, &GNUNET_GETOPT_set_uint, &list_keys_count },
354 { 'g', "generate-keys", "COUNT",
355 gettext_noop ("create COUNT public-private key pairs (for testing)"),
356 1, &GNUNET_GETOPT_set_uint, &make_keys },
357 { 'p', "print-public-key", NULL,
358 gettext_noop ("print the public key in ASCII format"),
359 0, &GNUNET_GETOPT_set_one, &print_public_key },
360 { 'P', "print-peer-identity", NULL,
361 gettext_noop ("print the hash of the public key in ASCII format"),
362 0, &GNUNET_GETOPT_set_one, &print_peer_identity },
363 { 'E', "examples", NULL,
364 gettext_noop ("print examples of ECC operations (used for compatibility testing)"),
365 0, &GNUNET_GETOPT_set_one, &print_examples_flag },
366 GNUNET_GETOPT_OPTION_END
370 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
374 GNUNET_PROGRAM_run (argc, argv, "gnunet-ecc [OPTIONS] keyfile",
375 gettext_noop ("Manipulate GNUnet private ECC key files"),
376 options, &run, NULL)) ? 0 : 1;
377 GNUNET_free ((void*) argv);
381 /* end of gnunet-ecc.c */