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1 /*
2  * Copyright (C) 2013, 2014  Internet Systems Consortium, Inc. ("ISC")
3  *
4  * Permission to use, copy, modify, and/or distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
9  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
10  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
11  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
12  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
13  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
14  * PERFORMANCE OF THIS SOFTWARE.
15  */
16
17 /*! \file */
18
19 #include <config.h>
20
21 #include <stdlib.h>
22
23 #include <isc/buffer.h>
24 #include <isc/commandline.h>
25 #include <isc/entropy.h>
26 #include <isc/hash.h>
27 #include <isc/mem.h>
28 #include <isc/print.h>
29 #include <isc/string.h>
30 #include <isc/util.h>
31
32 #include <dns/callbacks.h>
33 #include <dns/db.h>
34 #include <dns/dbiterator.h>
35 #include <dns/ds.h>
36 #include <dns/fixedname.h>
37 #include <dns/keyvalues.h>
38 #include <dns/log.h>
39 #include <dns/master.h>
40 #include <dns/name.h>
41 #include <dns/rdata.h>
42 #include <dns/rdataclass.h>
43 #include <dns/rdataset.h>
44 #include <dns/rdatasetiter.h>
45 #include <dns/rdatatype.h>
46 #include <dns/result.h>
47
48 #include <dst/dst.h>
49
50 #include "dnssectool.h"
51
52 #ifndef PATH_MAX
53 #define PATH_MAX 1024   /* AIX, WIN32, and others don't define this. */
54 #endif
55
56 const char *program = "dnssec-importkey";
57 int verbose;
58
59 static dns_rdataclass_t rdclass;
60 static dns_fixedname_t  fixed;
61 static dns_name_t       *name = NULL;
62 static isc_mem_t        *mctx = NULL;
63 static isc_boolean_t    setpub = ISC_FALSE, setdel = ISC_FALSE;
64 static isc_boolean_t    setttl = ISC_FALSE;
65 static isc_stdtime_t    pub = 0, del = 0;
66 static dns_ttl_t        ttl = 0;
67
68 static isc_result_t
69 initname(char *setname) {
70         isc_result_t result;
71         isc_buffer_t buf;
72
73         dns_fixedname_init(&fixed);
74         name = dns_fixedname_name(&fixed);
75
76         isc_buffer_init(&buf, setname, strlen(setname));
77         isc_buffer_add(&buf, strlen(setname));
78         result = dns_name_fromtext(name, &buf, dns_rootname, 0, NULL);
79         return (result);
80 }
81
82 static void
83 db_load_from_stream(dns_db_t *db, FILE *fp) {
84         isc_result_t result;
85         dns_rdatacallbacks_t callbacks;
86
87         dns_rdatacallbacks_init(&callbacks);
88         result = dns_db_beginload(db, &callbacks.add, &callbacks.add_private);
89         if (result != ISC_R_SUCCESS)
90                 fatal("dns_db_beginload failed: %s", isc_result_totext(result));
91
92         result = dns_master_loadstream(fp, name, name, rdclass, 0,
93                                        &callbacks, mctx);
94         if (result != ISC_R_SUCCESS)
95                 fatal("can't load from input: %s", isc_result_totext(result));
96
97         result = dns_db_endload(db, &callbacks.add_private);
98         if (result != ISC_R_SUCCESS)
99                 fatal("dns_db_endload failed: %s", isc_result_totext(result));
100 }
101
102 static isc_result_t
103 loadset(const char *filename, dns_rdataset_t *rdataset) {
104         isc_result_t     result;
105         dns_db_t         *db = NULL;
106         dns_dbnode_t     *node = NULL;
107         char setname[DNS_NAME_FORMATSIZE];
108
109         dns_name_format(name, setname, sizeof(setname));
110
111         result = dns_db_create(mctx, "rbt", name, dns_dbtype_zone,
112                                rdclass, 0, NULL, &db);
113         if (result != ISC_R_SUCCESS)
114                 fatal("can't create database");
115
116         if (strcmp(filename, "-") == 0) {
117                 db_load_from_stream(db, stdin);
118                 filename = "input";
119         } else {
120                 result = dns_db_load3(db, filename, dns_masterformat_text,
121                                       DNS_MASTER_NOTTL);
122                 if (result != ISC_R_SUCCESS && result != DNS_R_SEENINCLUDE)
123                         fatal("can't load %s: %s", filename,
124                               isc_result_totext(result));
125         }
126
127         result = dns_db_findnode(db, name, ISC_FALSE, &node);
128         if (result != ISC_R_SUCCESS)
129                 fatal("can't find %s node in %s", setname, filename);
130
131         result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_dnskey,
132                                      0, 0, rdataset, NULL);
133
134         if (result == ISC_R_NOTFOUND)
135                 fatal("no DNSKEY RR for %s in %s", setname, filename);
136         else if (result != ISC_R_SUCCESS)
137                 fatal("dns_db_findrdataset");
138
139         if (node != NULL)
140                 dns_db_detachnode(db, &node);
141         if (db != NULL)
142                 dns_db_detach(&db);
143         return (result);
144 }
145
146 static void
147 loadkey(char *filename, unsigned char *key_buf, unsigned int key_buf_size,
148         dns_rdata_t *rdata)
149 {
150         isc_result_t  result;
151         dst_key_t     *key = NULL;
152         isc_buffer_t  keyb;
153         isc_region_t  r;
154
155         dns_rdata_init(rdata);
156
157         isc_buffer_init(&keyb, key_buf, key_buf_size);
158
159         result = dst_key_fromnamedfile(filename, NULL, DST_TYPE_PUBLIC,
160                                        mctx, &key);
161         if (result != ISC_R_SUCCESS)
162                 fatal("invalid keyfile name %s: %s",
163                       filename, isc_result_totext(result));
164
165         if (verbose > 2) {
166                 char keystr[DST_KEY_FORMATSIZE];
167
168                 dst_key_format(key, keystr, sizeof(keystr));
169                 fprintf(stderr, "%s: %s\n", program, keystr);
170         }
171
172         result = dst_key_todns(key, &keyb);
173         if (result != ISC_R_SUCCESS)
174                 fatal("can't decode key");
175
176         isc_buffer_usedregion(&keyb, &r);
177         dns_rdata_fromregion(rdata, dst_key_class(key),
178                              dns_rdatatype_dnskey, &r);
179
180         rdclass = dst_key_class(key);
181
182         dns_fixedname_init(&fixed);
183         name = dns_fixedname_name(&fixed);
184         result = dns_name_copy(dst_key_name(key), name, NULL);
185         if (result != ISC_R_SUCCESS)
186                 fatal("can't copy name");
187
188         dst_key_free(&key);
189 }
190
191 static void
192 emit(const char *dir, dns_rdata_t *rdata) {
193         isc_result_t result;
194         char keystr[DST_KEY_FORMATSIZE];
195         char pubname[1024];
196         char priname[1024];
197         isc_buffer_t buf;
198         dst_key_t *key = NULL, *tmp = NULL;
199
200         isc_buffer_init(&buf, rdata->data, rdata->length);
201         isc_buffer_add(&buf, rdata->length);
202         result = dst_key_fromdns(name, rdclass, &buf, mctx, &key);
203         if (result != ISC_R_SUCCESS) {
204                 fatal("dst_key_fromdns: %s", isc_result_totext(result));
205         }
206
207         isc_buffer_init(&buf, pubname, sizeof(pubname));
208         result = dst_key_buildfilename(key, DST_TYPE_PUBLIC, dir, &buf);
209         if (result != ISC_R_SUCCESS) {
210                 fatal("Failed to build public key filename: %s",
211                       isc_result_totext(result));
212         }
213         isc_buffer_init(&buf, priname, sizeof(priname));
214         result = dst_key_buildfilename(key, DST_TYPE_PRIVATE, dir, &buf);
215         if (result != ISC_R_SUCCESS) {
216                 fatal("Failed to build private key filename: %s",
217                       isc_result_totext(result));
218         }
219
220         result = dst_key_fromfile(dst_key_name(key), dst_key_id(key),
221                                   dst_key_alg(key),
222                                   DST_TYPE_PUBLIC | DST_TYPE_PRIVATE,
223                                   dir, mctx, &tmp);
224         if (result == ISC_R_SUCCESS) {
225                 if (dst_key_isprivate(tmp) && !dst_key_isexternal(tmp))
226                         fatal("Private key already exists in %s", priname);
227                 dst_key_free(&tmp);
228         }
229
230         dst_key_setexternal(key, ISC_TRUE);
231         if (setpub)
232                 dst_key_settime(key, DST_TIME_PUBLISH, pub);
233         if (setdel)
234                 dst_key_settime(key, DST_TIME_DELETE, del);
235         if (setttl)
236                 dst_key_setttl(key, ttl);
237
238         result = dst_key_tofile(key, DST_TYPE_PUBLIC|DST_TYPE_PRIVATE,
239                                 dir);
240         if (result != ISC_R_SUCCESS) {
241                 dst_key_format(key, keystr, sizeof(keystr));
242                 fatal("Failed to write key %s: %s", keystr,
243                       isc_result_totext(result));
244         }
245         printf("%s\n", pubname);
246
247         isc_buffer_clear(&buf);
248         result = dst_key_buildfilename(key, DST_TYPE_PRIVATE, dir, &buf);
249         if (result != ISC_R_SUCCESS) {
250                 fatal("Failed to build private key filename: %s",
251                       isc_result_totext(result));
252         }
253         printf("%s\n", priname);
254         dst_key_free(&key);
255 }
256
257 ISC_PLATFORM_NORETURN_PRE static void
258 usage(void) ISC_PLATFORM_NORETURN_POST;
259
260 static void
261 usage(void) {
262         fprintf(stderr, "Usage:\n");
263         fprintf(stderr, "    %s options [-K dir] keyfile\n\n", program);
264         fprintf(stderr, "    %s options -f file [keyname]\n\n", program);
265         fprintf(stderr, "Version: %s\n", VERSION);
266         fprintf(stderr, "Options:\n");
267         fprintf(stderr, "    -f file: read key from zone file\n");
268         fprintf(stderr, "    -K <directory>: directory in which to store "
269                                 "the key files\n");
270         fprintf(stderr, "    -L ttl:             set default key TTL\n");
271         fprintf(stderr, "    -v <verbose level>\n");
272         fprintf(stderr, "    -V: print version information\n");
273         fprintf(stderr, "    -h: print usage and exit\n");
274         fprintf(stderr, "Timing options:\n");
275         fprintf(stderr, "    -P date/[+-]offset/none: set/unset key "
276                                                      "publication date\n");
277         fprintf(stderr, "    -D date/[+-]offset/none: set/unset key "
278                                                      "deletion date\n");
279
280         exit (-1);
281 }
282
283 int
284 main(int argc, char **argv) {
285         char            *classname = NULL;
286         char            *filename = NULL, *dir = NULL, *namestr;
287         char            *endp;
288         int             ch;
289         isc_result_t    result;
290         isc_log_t       *log = NULL;
291         isc_entropy_t   *ectx = NULL;
292         dns_rdataset_t  rdataset;
293         dns_rdata_t     rdata;
294         isc_stdtime_t   now;
295
296         dns_rdata_init(&rdata);
297         isc_stdtime_get(&now);
298
299         if (argc == 1)
300                 usage();
301
302         result = isc_mem_create(0, 0, &mctx);
303         if (result != ISC_R_SUCCESS)
304                 fatal("out of memory");
305
306         dns_result_register();
307
308         isc_commandline_errprint = ISC_FALSE;
309
310 #define CMDLINE_FLAGS "D:f:hK:L:P:v:V"
311         while ((ch = isc_commandline_parse(argc, argv, CMDLINE_FLAGS)) != -1) {
312                 switch (ch) {
313                 case 'D':
314                         if (setdel)
315                                 fatal("-D specified more than once");
316
317                         del = strtotime(isc_commandline_argument,
318                                         now, now, &setdel);
319                         break;
320                 case 'K':
321                         dir = isc_commandline_argument;
322                         if (strlen(dir) == 0U)
323                                 fatal("directory must be non-empty string");
324                         break;
325                 case 'L':
326                         ttl = strtottl(isc_commandline_argument);
327                         setttl = ISC_TRUE;
328                         break;
329                 case 'P':
330                         if (setpub)
331                                 fatal("-P specified more than once");
332
333                         pub = strtotime(isc_commandline_argument,
334                                         now, now, &setpub);
335                         break;
336                 case 'f':
337                         filename = isc_commandline_argument;
338                         break;
339                 case 'v':
340                         verbose = strtol(isc_commandline_argument, &endp, 0);
341                         if (*endp != '\0')
342                                 fatal("-v must be followed by a number");
343                         break;
344                 case '?':
345                         if (isc_commandline_option != '?')
346                                 fprintf(stderr, "%s: invalid argument -%c\n",
347                                         program, isc_commandline_option);
348                         /* FALLTHROUGH */
349                 case 'h':
350                         /* Does not return. */
351                         usage();
352
353                 case 'V':
354                         /* Does not return. */
355                         version(program);
356
357                 default:
358                         fprintf(stderr, "%s: unhandled option -%c\n",
359                                 program, isc_commandline_option);
360                         exit(1);
361                 }
362         }
363
364         rdclass = strtoclass(classname);
365
366         if (argc < isc_commandline_index + 1 && filename == NULL)
367                 fatal("the key file name was not specified");
368         if (argc > isc_commandline_index + 1)
369                 fatal("extraneous arguments");
370
371         if (ectx == NULL)
372                 setup_entropy(mctx, NULL, &ectx);
373         result = isc_hash_create(mctx, ectx, DNS_NAME_MAXWIRE);
374         if (result != ISC_R_SUCCESS)
375                 fatal("could not initialize hash");
376         result = dst_lib_init(mctx, ectx,
377                               ISC_ENTROPY_BLOCKING | ISC_ENTROPY_GOODONLY);
378         if (result != ISC_R_SUCCESS)
379                 fatal("could not initialize dst: %s",
380                       isc_result_totext(result));
381         isc_entropy_stopcallbacksources(ectx);
382
383         setup_logging(verbose, mctx, &log);
384
385         dns_rdataset_init(&rdataset);
386
387         if (filename != NULL) {
388                 if (argc < isc_commandline_index + 1) {
389                         /* using filename as zone name */
390                         namestr = filename;
391                 } else
392                         namestr = argv[isc_commandline_index];
393
394                 result = initname(namestr);
395                 if (result != ISC_R_SUCCESS)
396                         fatal("could not initialize name %s", namestr);
397
398                 result = loadset(filename, &rdataset);
399
400                 if (result != ISC_R_SUCCESS)
401                         fatal("could not load DNSKEY set: %s\n",
402                               isc_result_totext(result));
403
404                 for (result = dns_rdataset_first(&rdataset);
405                      result == ISC_R_SUCCESS;
406                      result = dns_rdataset_next(&rdataset)) {
407
408                         dns_rdata_init(&rdata);
409                         dns_rdataset_current(&rdataset, &rdata);
410                         emit(dir, &rdata);
411                 }
412         } else {
413                 unsigned char key_buf[DST_KEY_MAXSIZE];
414
415                 loadkey(argv[isc_commandline_index], key_buf,
416                         DST_KEY_MAXSIZE, &rdata);
417
418                 emit(dir, &rdata);
419         }
420
421         if (dns_rdataset_isassociated(&rdataset))
422                 dns_rdataset_disassociate(&rdataset);
423         cleanup_logging(&log);
424         dst_lib_destroy();
425         isc_hash_destroy();
426         cleanup_entropy(&ectx);
427         dns_name_destroy();
428         if (verbose > 10)
429                 isc_mem_stats(mctx, stdout);
430         isc_mem_destroy(&mctx);
431
432         fflush(stdout);
433         if (ferror(stdout)) {
434                 fprintf(stderr, "write error\n");
435                 return (1);
436         } else
437                 return (0);
438 }