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-rsa.c
23 * @brief tool to manipulate RSA key files
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
32 * Flag for printing public key.
34 static int print_public_key;
37 * Flag for printing hash of public key.
39 static int print_peer_identity;
42 * Flag for printing short hash of public key.
44 static int print_short_identity;
47 * Use weak random number generator for key generation.
49 static int weak_random;
53 * The private information of an RSA key pair.
54 * NOTE: this must match the definition in crypto_ksk.c and crypto_rsa.c!
56 struct GNUNET_CRYPTO_RsaPrivateKey
64 * Create a new private key. Caller must free return value.
66 * @return fresh private key
68 struct GNUNET_CRYPTO_RsaPrivateKey *
69 GNUNET_CRYPTO_rsa_key_create ()
71 struct GNUNET_CRYPTO_RsaPrivateKey *ret;
73 gcry_sexp_t s_keyparam;
76 gcry_sexp_build (&s_keyparam, NULL,
77 "(genkey(rsa(nbits %d)(rsa-use-e 3:257)))",
79 GNUNET_assert (0 == gcry_pk_genkey (&s_key, s_keyparam));
80 gcry_sexp_release (s_keyparam);
82 GNUNET_assert (0 == gcry_pk_testkey (s_key));
84 ret = GNUNET_malloc (sizeof (struct GNUNET_CRYPTO_RsaPrivateKey));
92 * Main function that will be run by the scheduler.
95 * @param args remaining command-line arguments
96 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
97 * @param cfg configuration
100 run (void *cls, char *const *args, const char *cfgfile,
101 const struct GNUNET_CONFIGURATION_Handle *cfg)
103 struct GNUNET_CRYPTO_RsaPrivateKey *pk;
104 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pub;
105 struct GNUNET_PeerIdentity pid;
109 fprintf (stderr, _("No hostkey file specified on command line\n"));
112 if (0 != weak_random)
113 GNUNET_CRYPTO_random_disable_entropy_gathering ();
114 pk = GNUNET_CRYPTO_rsa_key_create_from_file (args[0]);
117 if (print_public_key)
121 GNUNET_CRYPTO_rsa_key_get_public (pk, &pub);
122 s = GNUNET_CRYPTO_rsa_public_key_to_string (&pub);
123 fprintf (stdout, "%s\n", s);
126 if (print_peer_identity)
128 struct GNUNET_CRYPTO_HashAsciiEncoded enc;
130 GNUNET_CRYPTO_rsa_key_get_public (pk, &pub);
131 GNUNET_CRYPTO_hash (&pub, sizeof (pub), &pid.hashPubKey);
132 GNUNET_CRYPTO_hash_to_enc (&pid.hashPubKey, &enc);
133 fprintf (stdout, "%s\n", enc.encoding);
135 if (print_short_identity)
137 struct GNUNET_CRYPTO_ShortHashAsciiEncoded enc;
138 struct GNUNET_CRYPTO_ShortHashCode sh;
140 GNUNET_CRYPTO_rsa_key_get_public (pk, &pub);
141 GNUNET_CRYPTO_short_hash (&pub, sizeof (pub), &sh);
142 GNUNET_CRYPTO_short_hash_to_enc (&sh, &enc);
143 fprintf (stdout, "%s\n", enc.short_encoding);
145 GNUNET_CRYPTO_rsa_key_free (pk);
150 * Program to manipulate RSA key files.
152 * @param argc number of arguments from the command line
153 * @param argv command line arguments
154 * @return 0 ok, 1 on error
157 main (int argc, char *const *argv)
159 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
160 { 'p', "print-public-key", NULL,
161 gettext_noop ("print the public key in ASCII format"),
162 0, &GNUNET_GETOPT_set_one, &print_public_key },
163 { 'P', "print-peer-identity", NULL,
164 gettext_noop ("print the hash of the public key in ASCII format"),
165 0, &GNUNET_GETOPT_set_one, &print_peer_identity },
166 { 's', "print-short-identity", NULL,
167 gettext_noop ("print the short hash of the public key in ASCII format"),
168 0, &GNUNET_GETOPT_set_one, &print_short_identity },
169 { 'w', "weak-random", NULL,
170 gettext_noop ("use insecure, weak random number generator for key generation (for testing only)"),
171 0, &GNUNET_GETOPT_set_one, &weak_random },
172 GNUNET_GETOPT_OPTION_END
175 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
179 GNUNET_PROGRAM_run (argc, argv, "gnunet-rsa [OPTIONS] keyfile",
180 gettext_noop ("Manipulate GNUnet private RSA key files"),
181 options, &run, NULL)) ? 0 : 1;
184 /* end of gnunet-rsa.c */