external/bsd/bind/dist/bin/dnssec/dnssec-revoke.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2009  Internet Systems Consortium, Inc. ("ISC")
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  11  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  12  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  13  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  14  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  15  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  16  * PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 /* Id: dnssec-revoke.c,v 1.18 2009/10/27 18:56:48 each Exp */
  20
  21 /*! \file */
  22
  23 #include <config.h>
  24
  25 #include <libgen.h>
  26 #include <stdlib.h>
  27 #include <unistd.h>
  28
  29 #include <isc/buffer.h>
  30 #include <isc/commandline.h>
  31 #include <isc/entropy.h>
  32 #include <isc/file.h>
  33 #include <isc/hash.h>
  34 #include <isc/mem.h>
  35 #include <isc/print.h>
  36 #include <isc/string.h>
  37 #include <isc/util.h>
  38
  39 #include <dns/keyvalues.h>
  40 #include <dns/result.h>
  41
  42 #include <dst/dst.h>
  43
  44 #include "dnssectool.h"
  45
  46 const char *program = "dnssec-revoke";
  47 int verbose;
  48
  49 static isc_mem_t        *mctx = NULL;
  50
  51 ISC_PLATFORM_NORETURN_PRE static void
  52 usage(void) ISC_PLATFORM_NORETURN_POST;
  53
  54 static void
  55 usage(void) {
  56         fprintf(stderr, "Usage:\n");
  57         fprintf(stderr, "    %s [options] keyfile\n\n", program);
  58         fprintf(stderr, "Version: %s\n", VERSION);
  59         fprintf(stderr, "\t-E engine:\n");
  60 #ifdef USE_PKCS11
  61         fprintf(stderr, "\t\tname of an OpenSSL engine to use "
  62                                 "(default is \"pkcs11\")\n");
  63 #else
  64         fprintf(stderr, "\t\tname of an OpenSSL engine to use\n");
  65 #endif
  66         fprintf(stderr, "    -f:           force overwrite\n");
  67         fprintf(stderr, "    -K directory: use directory for key files\n");
  68         fprintf(stderr, "    -h:           help\n");
  69         fprintf(stderr, "    -r:           remove old keyfiles after "
  70                                            "creating revoked version\n");
  71         fprintf(stderr, "    -v level:     set level of verbosity\n");
  72         fprintf(stderr, "Output:\n");
  73         fprintf(stderr, "     K<name>+<alg>+<new id>.key, "
  74                              "K<name>+<alg>+<new id>.private\n");
  75
  76         exit (-1);
  77 }
  78
  79 int
  80 main(int argc, char **argv) {
  81         isc_result_t result;
  82 #ifdef USE_PKCS11
  83         const char *engine = "pkcs11";
  84 #else
  85         const char *engine = NULL;
  86 #endif
  87         char *filename = NULL, *dir = NULL;
  88         char newname[1024], oldname[1024];
  89         char keystr[DST_KEY_FORMATSIZE];
  90         char *endp;
  91         int ch;
  92         isc_entropy_t *ectx = NULL;
  93         dst_key_t *key = NULL;
  94         isc_uint32_t flags;
  95         isc_buffer_t buf;
  96         isc_boolean_t force = ISC_FALSE;
  97         isc_boolean_t remove = ISC_FALSE;
  98
  99         if (argc == 1)
 100                 usage();
 101
 102         result = isc_mem_create(0, 0, &mctx);
 103         if (result != ISC_R_SUCCESS)
 104                 fatal("Out of memory");
 105
 106         dns_result_register();
 107
 108         isc_commandline_errprint = ISC_FALSE;
 109
 110         while ((ch = isc_commandline_parse(argc, argv, "E:fK:rhv:")) != -1) {
 111                 switch (ch) {
 112                     case 'E':
 113                         engine = isc_commandline_argument;
 114                         break;
 115                     case 'f':
 116                         force = ISC_TRUE;
 117                         break;
 118                     case 'K':
 119                         /*
 120                          * We don't have to copy it here, but do it to
 121                          * simplify cleanup later
 122                          */
 123                         dir = isc_mem_strdup(mctx, isc_commandline_argument);
 124                         if (dir == NULL) {
 125                                 fatal("Failed to allocate memory for "
 126                                       "directory");
 127                         }
 128                         break;
 129                     case 'r':
 130                         remove = ISC_TRUE;
 131                         break;
 132                     case 'v':
 133                         verbose = strtol(isc_commandline_argument, &endp, 0);
 134                         if (*endp != '\0')
 135                                 fatal("-v must be followed by a number");
 136                         break;
 137                     case '?':
 138                         if (isc_commandline_option != '?')
 139                                 fprintf(stderr, "%s: invalid argument -%c\n",
 140                                         program, isc_commandline_option);
 141                         /* Falls into */
 142                     case 'h':
 143                         usage();
 144
 145                     default:
 146                         fprintf(stderr, "%s: unhandled option -%c\n",
 147                                 program, isc_commandline_option);
 148                         exit(1);
 149                 }
 150         }
 151
 152         if (argc < isc_commandline_index + 1 ||
 153             argv[isc_commandline_index] == NULL)
 154                 fatal("The key file name was not specified");
 155         if (argc > isc_commandline_index + 1)
 156                 fatal("Extraneous arguments");
 157
 158         if (dir != NULL) {
 159                 filename = argv[isc_commandline_index];
 160         } else {
 161                 result = isc_file_splitpath(mctx, argv[isc_commandline_index],
 162                                             &dir, &filename);
 163                 if (result != ISC_R_SUCCESS)
 164                         fatal("cannot process filename %s: %s",
 165                               argv[isc_commandline_index],
 166                               isc_result_totext(result));
 167         }
 168
 169         if (ectx == NULL)
 170                 setup_entropy(mctx, NULL, &ectx);
 171         result = isc_hash_create(mctx, ectx, DNS_NAME_MAXWIRE);
 172         if (result != ISC_R_SUCCESS)
 173                 fatal("Could not initialize hash");
 174         result = dst_lib_init2(mctx, ectx, engine,
 175                                ISC_ENTROPY_BLOCKING | ISC_ENTROPY_GOODONLY);
 176         if (result != ISC_R_SUCCESS)
 177                 fatal("Could not initialize dst: %s",
 178                       isc_result_totext(result));
 179         isc_entropy_stopcallbacksources(ectx);
 180
 181         result = dst_key_fromnamedfile(filename, dir,
 182                                        DST_TYPE_PUBLIC|DST_TYPE_PRIVATE,
 183                                        mctx, &key);
 184         if (result != ISC_R_SUCCESS)
 185                 fatal("Invalid keyfile name %s: %s",
 186                       filename, isc_result_totext(result));
 187
 188         dst_key_format(key, keystr, sizeof(keystr));
 189
 190         if (verbose > 2)
 191                 fprintf(stderr, "%s: %s\n", program, keystr);
 192
 193         if (force)
 194                 set_keyversion(key);
 195         else
 196                 check_keyversion(key, keystr);
 197
 198
 199         flags = dst_key_flags(key);
 200         if ((flags & DNS_KEYFLAG_REVOKE) == 0) {
 201                 isc_stdtime_t now;
 202
 203                 if ((flags & DNS_KEYFLAG_KSK) == 0)
 204                         fprintf(stderr, "%s: warning: Key is not flagged "
 205                                         "as a KSK. Revoking a ZSK is "
 206                                         "legal, but undefined.\n",
 207                                         program);
 208
 209                 isc_stdtime_get(&now);
 210                 dst_key_settime(key, DST_TIME_REVOKE, now);
 211
 212                 dst_key_setflags(key, flags | DNS_KEYFLAG_REVOKE);
 213
 214                 isc_buffer_init(&buf, newname, sizeof(newname));
 215                 dst_key_buildfilename(key, DST_TYPE_PUBLIC, dir, &buf);
 216
 217                 if (access(newname, F_OK) == 0 && !force) {
 218                         fatal("Key file %s already exists; "
 219                               "use -f to force overwrite", newname);
 220                 }
 221
 222                 result = dst_key_tofile(key, DST_TYPE_PUBLIC|DST_TYPE_PRIVATE,
 223                                         dir);
 224                 if (result != ISC_R_SUCCESS) {
 225                         dst_key_format(key, keystr, sizeof(keystr));
 226                         fatal("Failed to write key %s: %s", keystr,
 227                               isc_result_totext(result));
 228                 }
 229
 230                 printf("%s\n", newname);
 231
 232                 isc_buffer_clear(&buf);
 233                 dst_key_buildfilename(key, DST_TYPE_PRIVATE, dir, &buf);
 234                 printf("%s\n", newname);
 235
 236                 /*
 237                  * Remove old key file, if told to (and if
 238                  * it isn't the same as the new file)
 239                  */
 240                 if (remove && dst_key_alg(key) != DST_ALG_RSAMD5) {
 241                         isc_buffer_init(&buf, oldname, sizeof(oldname));
 242                         dst_key_setflags(key, flags & ~DNS_KEYFLAG_REVOKE);
 243                         dst_key_buildfilename(key, DST_TYPE_PRIVATE, dir, &buf);
 244                         if (strcmp(oldname, newname) == 0)
 245                                 goto cleanup;
 246                         if (access(oldname, F_OK) == 0)
 247                                 unlink(oldname);
 248                         isc_buffer_clear(&buf);
 249                         dst_key_buildfilename(key, DST_TYPE_PUBLIC, dir, &buf);
 250                         if (access(oldname, F_OK) == 0)
 251                                 unlink(oldname);
 252                 }
 253         } else {
 254                 dst_key_format(key, keystr, sizeof(keystr));
 255                 fatal("Key %s is already revoked", keystr);
 256         }
 257
 258 cleanup:
 259         dst_key_free(&key);
 260         dst_lib_destroy();
 261         isc_hash_destroy();
 262         cleanup_entropy(&ectx);
 263         if (verbose > 10)
 264                 isc_mem_stats(mctx, stdout);
 265         isc_mem_free(mctx, dir);
 266         isc_mem_destroy(&mctx);
 267
 268         return (0);
 269 }