summaryrefslogtreecommitdiff
path: root/src/mint-tools/taler-auditor-sign.c
blob: a2457a2fd4d3420cba59ace36d92057f8616d88e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
/*
  This file is part of TALER
  Copyright (C) 2014, 2015 Christian Grothoff (and other contributing authors)

  TALER is free software; you can redistribute it and/or modify it under the
  terms of the GNU General Public License as published by the Free Software
  Foundation; either version 3, or (at your option) any later version.

  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with
  TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
*/
/**
 * @file taler-auditor-sign.c
 * @brief Tool used by the auditor to sign the mint's master key and the
 *        denomination key(s).
 * @author Christian Grothoff
 */
#include <platform.h>
#include "taler_mintdb_lib.h"


/**
 * Filename of the auditor's private key.
 */
static char *auditor_key_file;

/**
 * Mint's public key (in Crockford base32 encoding).
 */
static char *mint_public_key;

/**
 * File with the Mint's denomination keys to sign, itself
 * signed by the Mint's public key.
 */
static char *mint_request_file;

/**
 * Where should we write the auditor's signature?
 */
static char *output_file;

/**
 * Handle to the auditor's configuration
 */
static struct GNUNET_CONFIGURATION_Handle *kcfg;

/**
 * Master public key of the mint.
 */
static struct TALER_MasterPublicKeyP master_public_key;



/**
 * The main function of the taler-auditor-sign tool.  This tool is used
 * to sign a mint's master and denomination keys, affirming that the
 * auditor is aware of them and will validate the mint's database with
 * respect to these keys.
 *
 * @param argc number of arguments from the command line
 * @param argv command line arguments
 * @return 0 ok, 1 on error
 */
int
main (int argc,
      char *const *argv)
{
  static const struct GNUNET_GETOPT_CommandLineOption options[] = {
    {'a', "auditor-key", "FILE",
     "file containing the private key of the auditor", 1,
     &GNUNET_GETOPT_set_filename, &auditor_key_file},
    TALER_GETOPT_OPTION_HELP ("Private key of the auditor to use for signing"),
    {'m', "mint-key", "KEY",
     "public key of the mint (Crockford base32 encoded)", 1,
     &GNUNET_GETOPT_set_filename, &mint_public_key},
    {'r', "mint-request", "FILE",
     "set of keys the mint requested the auditor to sign", 0,
     &GNUNET_GETOPT_set_string, &mint_request_file},
    {'o', "output", "FILE",
     "where to write our signature", 0,
     &GNUNET_GETOPT_set_string, &output_file},
    GNUNET_GETOPT_OPTION_VERSION (VERSION "-" VCS_VERSION),
    GNUNET_GETOPT_OPTION_END
  };
  struct GNUNET_CRYPTO_EddsaPrivateKey *eddsa_priv;
  struct GNUNET_DISK_FileHandle *fh;
  struct GNUNET_DISK_FileHandle *fout;
  off_t in_size;

  GNUNET_assert (GNUNET_OK ==
                 GNUNET_log_setup ("taler-mint-keyup",
                                   "WARNING",
                                   NULL));
  if (GNUNET_GETOPT_run ("taler-mint-keyup",
                         options,
                         argc, argv) < 0)
    return 1;
  if (NULL == auditor_key_file)
  {
    fprintf (stderr,
             "Auditor key file not given\n");
    return 1;
  }
  eddsa_priv = GNUNET_CRYPTO_eddsa_key_create_from_file (auditor_key_file);
  if (NULL == eddsa_priv)
  {
    fprintf (stderr,
             "Failed to initialize auditor key from file `%s'\n",
             auditor_key_file);
    return 1;
  }
  if (NULL == mint_public_key)
  {
    fprintf (stderr,
             "Mint public key not given\n");
    return 1;
  }
  if (GNUNET_OK !=
      GNUNET_STRINGS_string_to_data (mint_public_key,
                                     strlen (mint_public_key),
                                     &master_public_key,
                                     sizeof (master_public_key)))
  {
    fprintf (stderr,
             "Public key `%s' malformed\n",
             mint_public_key);
    return 1;
  }
  if (NULL == mint_request_file)
  {
    fprintf (stderr,
             "Mint signing request not given\n");
    return 1;
  }
  fh = GNUNET_DISK_file_open (mint_request_file,
                              GNUNET_DISK_OPEN_READ,
                              GNUNET_DISK_PERM_NONE);
  if (NULL == fh)
  {
    fprintf (stderr,
             "Failed to open file `%s': %s\n",
             mint_request_file,
             STRERROR (errno));
    return 1;
  }
  if (GNUNET_OK !=
      GNUNET_DISK_file_handle_size (fh,
                                    &in_size))
  {
    fprintf (stderr,
             "Failed to obtain input file size `%s': %s\n",
             mint_request_file,
             STRERROR (errno));
    GNUNET_DISK_file_close (fh);
    return 1;
  }
  if (NULL == output_file)
  {
    fprintf (stderr,
             "Output file not given\n");
    GNUNET_DISK_file_close (fh);
    return 1;
  }
  fout = GNUNET_DISK_file_open (output_file,
                                GNUNET_DISK_OPEN_READ |
                                GNUNET_DISK_OPEN_TRUNCATE |
                                GNUNET_DISK_OPEN_CREATE,
                                GNUNET_DISK_PERM_USER_READ |
                                GNUNET_DISK_PERM_USER_WRITE |
                                GNUNET_DISK_PERM_GROUP_READ |
                                GNUNET_DISK_PERM_OTHER_READ);
  if (NULL == fout)
  {
    fprintf (stderr,
             "Failed to open file `%s': %s\n",
             output_file,
             STRERROR (errno));
    GNUNET_DISK_file_close (fh);
    return 1;
  }
  /* FIXME: finally do real work... */

  GNUNET_free (eddsa_priv);
  return 0;
}

/* end of taler-auditor-sign.c */