2 * Portions Copyright (C) 2004-2013 Internet Systems Consortium, Inc. ("ISC")
3 * Portions Copyright (C) 1999-2003 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
10 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
11 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE
12 * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
15 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 * Portions Copyright (C) 1995-2000 by Network Associates, Inc.
19 * Permission to use, copy, modify, and/or distribute this software for any
20 * purpose with or without fee is hereby granted, provided that the above
21 * copyright notice and this permission notice appear in all copies.
23 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
24 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
25 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE
26 * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
27 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
28 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
29 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
33 * Principal Author: Brian Wellington
34 * $Id: dst_api.c,v 1.65 2011/10/20 21:20:02 marka Exp $
44 #include <isc/buffer.h>
46 #include <isc/entropy.h>
47 #include <isc/fsaccess.h>
48 #include <isc/hmacsha.h>
52 #include <isc/platform.h>
53 #include <isc/print.h>
54 #include <isc/refcount.h>
55 #include <isc/random.h>
56 #include <isc/string.h>
61 #define DST_KEY_INTERNAL
63 #include <dns/fixedname.h>
64 #include <dns/keyvalues.h>
66 #include <dns/rdata.h>
67 #include <dns/rdataclass.h>
69 #include <dns/types.h>
71 #include <dst/result.h>
73 #include "dst_internal.h"
75 #define DST_AS_STR(t) ((t).value.as_textregion.base)
77 static dst_func_t *dst_t_func[DST_MAX_ALGS];
79 static isc_entropy_t *dst_entropy_pool = NULL;
81 static unsigned int dst_entropy_flags = 0;
82 static isc_boolean_t dst_initialized = ISC_FALSE;
84 void gss_log(int level, const char *fmt, ...) ISC_FORMAT_PRINTF(2, 3);
86 isc_mem_t *dst__memory_pool = NULL;
91 static dst_key_t * get_key_struct(dns_name_t *name,
94 unsigned int protocol,
96 dns_rdataclass_t rdclass,
99 static isc_result_t write_public_key(const dst_key_t *key, int type,
100 const char *directory);
101 static isc_result_t buildfilename(dns_name_t *name,
105 const char *directory,
107 static isc_result_t computeid(dst_key_t *key);
108 static isc_result_t frombuffer(dns_name_t *name,
111 unsigned int protocol,
112 dns_rdataclass_t rdclass,
113 isc_buffer_t *source,
117 static isc_result_t algorithm_status(unsigned int alg);
119 static isc_result_t addsuffix(char *filename, int len,
120 const char *dirname, const char *ofilename,
126 if (result != ISC_R_SUCCESS) \
130 #define CHECKALG(alg) \
133 _r = algorithm_status(alg); \
134 if (_r != ISC_R_SUCCESS) \
138 #if defined(OPENSSL) && defined(BIND9)
140 default_memalloc(void *arg, size_t size) {
144 return (malloc(size));
148 default_memfree(void *arg, void *ptr) {
155 dst_lib_init(isc_mem_t *mctx, isc_entropy_t *ectx, unsigned int eflags) {
156 return (dst_lib_init2(mctx, ectx, NULL, eflags));
160 dst_lib_init2(isc_mem_t *mctx, isc_entropy_t *ectx,
161 const char *engine, unsigned int eflags) {
164 REQUIRE(mctx != NULL);
166 REQUIRE(ectx != NULL);
170 REQUIRE(dst_initialized == ISC_FALSE);
176 dst__memory_pool = NULL;
178 #if defined(OPENSSL) && defined(BIND9)
181 * When using --with-openssl, there seems to be no good way of not
182 * leaking memory due to the openssl error handling mechanism.
183 * Avoid assertions by using a local memory context and not checking
184 * for leaks on exit. Note: as there are leaks we cannot use
185 * ISC_MEMFLAG_INTERNAL as it will free up memory still being used
188 result = isc_mem_createx2(0, 0, default_memalloc, default_memfree,
189 NULL, &dst__memory_pool, 0);
190 if (result != ISC_R_SUCCESS)
192 isc_mem_setname(dst__memory_pool, "dst", NULL);
193 #ifndef OPENSSL_LEAKS
194 isc_mem_setdestroycheck(dst__memory_pool, ISC_FALSE);
197 isc_mem_attach(mctx, &dst__memory_pool);
200 isc_entropy_attach(ectx, &dst_entropy_pool);
202 dst_entropy_flags = eflags;
204 dst_result_register();
206 memset(dst_t_func, 0, sizeof(dst_t_func));
207 RETERR(dst__hmacmd5_init(&dst_t_func[DST_ALG_HMACMD5]));
208 RETERR(dst__hmacsha1_init(&dst_t_func[DST_ALG_HMACSHA1]));
209 RETERR(dst__hmacsha224_init(&dst_t_func[DST_ALG_HMACSHA224]));
210 RETERR(dst__hmacsha256_init(&dst_t_func[DST_ALG_HMACSHA256]));
211 RETERR(dst__hmacsha384_init(&dst_t_func[DST_ALG_HMACSHA384]));
212 RETERR(dst__hmacsha512_init(&dst_t_func[DST_ALG_HMACSHA512]));
214 RETERR(dst__openssl_init(engine));
215 RETERR(dst__opensslrsa_init(&dst_t_func[DST_ALG_RSAMD5],
217 RETERR(dst__opensslrsa_init(&dst_t_func[DST_ALG_RSASHA1],
219 RETERR(dst__opensslrsa_init(&dst_t_func[DST_ALG_NSEC3RSASHA1],
220 DST_ALG_NSEC3RSASHA1));
221 RETERR(dst__opensslrsa_init(&dst_t_func[DST_ALG_RSASHA256],
223 RETERR(dst__opensslrsa_init(&dst_t_func[DST_ALG_RSASHA512],
225 #ifdef HAVE_OPENSSL_DSA
226 RETERR(dst__openssldsa_init(&dst_t_func[DST_ALG_DSA]));
227 RETERR(dst__openssldsa_init(&dst_t_func[DST_ALG_NSEC3DSA]));
229 RETERR(dst__openssldh_init(&dst_t_func[DST_ALG_DH]));
230 #ifdef HAVE_OPENSSL_GOST
231 RETERR(dst__opensslgost_init(&dst_t_func[DST_ALG_ECCGOST]));
233 #ifdef HAVE_OPENSSL_ECDSA
234 RETERR(dst__opensslecdsa_init(&dst_t_func[DST_ALG_ECDSA256]));
235 RETERR(dst__opensslecdsa_init(&dst_t_func[DST_ALG_ECDSA384]));
239 RETERR(dst__gssapi_init(&dst_t_func[DST_ALG_GSSAPI]));
241 dst_initialized = ISC_TRUE;
242 return (ISC_R_SUCCESS);
245 /* avoid immediate crash! */
246 dst_initialized = ISC_TRUE;
252 dst_lib_destroy(void) {
254 RUNTIME_CHECK(dst_initialized == ISC_TRUE);
255 dst_initialized = ISC_FALSE;
257 for (i = 0; i < DST_MAX_ALGS; i++)
258 if (dst_t_func[i] != NULL && dst_t_func[i]->cleanup != NULL)
259 dst_t_func[i]->cleanup();
261 dst__openssl_destroy();
263 if (dst__memory_pool != NULL)
264 isc_mem_detach(&dst__memory_pool);
266 if (dst_entropy_pool != NULL)
267 isc_entropy_detach(&dst_entropy_pool);
272 dst_algorithm_supported(unsigned int alg) {
273 REQUIRE(dst_initialized == ISC_TRUE);
275 if (alg >= DST_MAX_ALGS || dst_t_func[alg] == NULL)
281 dst_context_create(dst_key_t *key, isc_mem_t *mctx, dst_context_t **dctxp) {
282 return (dst_context_create2(key, mctx,
283 DNS_LOGCATEGORY_GENERAL, dctxp));
287 dst_context_create2(dst_key_t *key, isc_mem_t *mctx,
288 isc_logcategory_t *category, dst_context_t **dctxp) {
292 REQUIRE(dst_initialized == ISC_TRUE);
293 REQUIRE(VALID_KEY(key));
294 REQUIRE(mctx != NULL);
295 REQUIRE(dctxp != NULL && *dctxp == NULL);
297 if (key->func->createctx == NULL)
298 return (DST_R_UNSUPPORTEDALG);
299 if (key->keydata.generic == NULL)
300 return (DST_R_NULLKEY);
302 dctx = isc_mem_get(mctx, sizeof(dst_context_t));
304 return (ISC_R_NOMEMORY);
307 dctx->category = category;
308 result = key->func->createctx(key, dctx);
309 if (result != ISC_R_SUCCESS) {
310 isc_mem_put(mctx, dctx, sizeof(dst_context_t));
313 dctx->magic = CTX_MAGIC;
315 return (ISC_R_SUCCESS);
319 dst_context_destroy(dst_context_t **dctxp) {
322 REQUIRE(dctxp != NULL && VALID_CTX(*dctxp));
325 INSIST(dctx->key->func->destroyctx != NULL);
326 dctx->key->func->destroyctx(dctx);
328 isc_mem_put(dctx->mctx, dctx, sizeof(dst_context_t));
333 dst_context_adddata(dst_context_t *dctx, const isc_region_t *data) {
334 REQUIRE(VALID_CTX(dctx));
335 REQUIRE(data != NULL);
336 INSIST(dctx->key->func->adddata != NULL);
338 return (dctx->key->func->adddata(dctx, data));
342 dst_context_sign(dst_context_t *dctx, isc_buffer_t *sig) {
345 REQUIRE(VALID_CTX(dctx));
346 REQUIRE(sig != NULL);
349 CHECKALG(key->key_alg);
350 if (key->keydata.generic == NULL)
351 return (DST_R_NULLKEY);
353 if (key->func->sign == NULL)
354 return (DST_R_NOTPRIVATEKEY);
355 if (key->func->isprivate == NULL ||
356 key->func->isprivate(key) == ISC_FALSE)
357 return (DST_R_NOTPRIVATEKEY);
359 return (key->func->sign(dctx, sig));
363 dst_context_verify(dst_context_t *dctx, isc_region_t *sig) {
364 REQUIRE(VALID_CTX(dctx));
365 REQUIRE(sig != NULL);
367 CHECKALG(dctx->key->key_alg);
368 if (dctx->key->keydata.generic == NULL)
369 return (DST_R_NULLKEY);
370 if (dctx->key->func->verify == NULL)
371 return (DST_R_NOTPUBLICKEY);
373 return (dctx->key->func->verify(dctx, sig));
377 dst_context_verify2(dst_context_t *dctx, unsigned int maxbits,
380 REQUIRE(VALID_CTX(dctx));
381 REQUIRE(sig != NULL);
383 CHECKALG(dctx->key->key_alg);
384 if (dctx->key->keydata.generic == NULL)
385 return (DST_R_NULLKEY);
386 if (dctx->key->func->verify == NULL &&
387 dctx->key->func->verify2 == NULL)
388 return (DST_R_NOTPUBLICKEY);
390 return (dctx->key->func->verify2 != NULL ?
391 dctx->key->func->verify2(dctx, maxbits, sig) :
392 dctx->key->func->verify(dctx, sig));
396 dst_key_computesecret(const dst_key_t *pub, const dst_key_t *priv,
397 isc_buffer_t *secret)
399 REQUIRE(dst_initialized == ISC_TRUE);
400 REQUIRE(VALID_KEY(pub) && VALID_KEY(priv));
401 REQUIRE(secret != NULL);
403 CHECKALG(pub->key_alg);
404 CHECKALG(priv->key_alg);
406 if (pub->keydata.generic == NULL || priv->keydata.generic == NULL)
407 return (DST_R_NULLKEY);
409 if (pub->key_alg != priv->key_alg ||
410 pub->func->computesecret == NULL ||
411 priv->func->computesecret == NULL)
412 return (DST_R_KEYCANNOTCOMPUTESECRET);
414 if (dst_key_isprivate(priv) == ISC_FALSE)
415 return (DST_R_NOTPRIVATEKEY);
417 return (pub->func->computesecret(pub, priv, secret));
421 dst_key_tofile(const dst_key_t *key, int type, const char *directory) {
422 isc_result_t ret = ISC_R_SUCCESS;
424 REQUIRE(dst_initialized == ISC_TRUE);
425 REQUIRE(VALID_KEY(key));
426 REQUIRE((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) != 0);
428 CHECKALG(key->key_alg);
430 if (key->func->tofile == NULL)
431 return (DST_R_UNSUPPORTEDALG);
433 if (type & DST_TYPE_PUBLIC) {
434 ret = write_public_key(key, type, directory);
435 if (ret != ISC_R_SUCCESS)
439 if ((type & DST_TYPE_PRIVATE) &&
440 (key->key_flags & DNS_KEYFLAG_TYPEMASK) != DNS_KEYTYPE_NOKEY)
441 return (key->func->tofile(key, directory));
443 return (ISC_R_SUCCESS);
447 dst_key_fromfile(dns_name_t *name, dns_keytag_t id,
448 unsigned int alg, int type, const char *directory,
449 isc_mem_t *mctx, dst_key_t **keyp)
451 char filename[ISC_DIR_NAMEMAX];
456 REQUIRE(dst_initialized == ISC_TRUE);
457 REQUIRE(dns_name_isabsolute(name));
458 REQUIRE((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) != 0);
459 REQUIRE(mctx != NULL);
460 REQUIRE(keyp != NULL && *keyp == NULL);
464 isc_buffer_init(&b, filename, sizeof(filename));
465 result = buildfilename(name, id, alg, type, directory, &b);
466 if (result != ISC_R_SUCCESS)
470 result = dst_key_fromnamedfile(filename, NULL, type, mctx, &key);
471 if (result != ISC_R_SUCCESS)
474 result = computeid(key);
475 if (result != ISC_R_SUCCESS) {
480 if (!dns_name_equal(name, key->key_name) || id != key->key_id ||
481 alg != key->key_alg) {
483 return (DST_R_INVALIDPRIVATEKEY);
487 return (ISC_R_SUCCESS);
491 dst_key_fromnamedfile(const char *filename, const char *dirname,
492 int type, isc_mem_t *mctx, dst_key_t **keyp)
495 dst_key_t *pubkey = NULL, *key = NULL;
496 char *newfilename = NULL;
497 int newfilenamelen = 0;
498 isc_lex_t *lex = NULL;
500 REQUIRE(dst_initialized == ISC_TRUE);
501 REQUIRE(filename != NULL);
502 REQUIRE((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) != 0);
503 REQUIRE(mctx != NULL);
504 REQUIRE(keyp != NULL && *keyp == NULL);
506 /* If an absolute path is specified, don't use the key directory */
508 if (filename[0] == '/')
511 if (filename[0] == '/' || filename[0] == '\\')
515 newfilenamelen = strlen(filename) + 5;
517 newfilenamelen += strlen(dirname) + 1;
518 newfilename = isc_mem_get(mctx, newfilenamelen);
519 if (newfilename == NULL)
520 return (ISC_R_NOMEMORY);
521 result = addsuffix(newfilename, newfilenamelen,
522 dirname, filename, ".key");
523 INSIST(result == ISC_R_SUCCESS);
525 result = dst_key_read_public(newfilename, type, mctx, &pubkey);
526 isc_mem_put(mctx, newfilename, newfilenamelen);
530 if ((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) == DST_TYPE_PUBLIC ||
531 (pubkey->key_flags & DNS_KEYFLAG_TYPEMASK) == DNS_KEYTYPE_NOKEY) {
532 result = computeid(pubkey);
533 if (result != ISC_R_SUCCESS) {
534 dst_key_free(&pubkey);
539 return (ISC_R_SUCCESS);
542 result = algorithm_status(pubkey->key_alg);
543 if (result != ISC_R_SUCCESS) {
544 dst_key_free(&pubkey);
548 key = get_key_struct(pubkey->key_name, pubkey->key_alg,
549 pubkey->key_flags, pubkey->key_proto, 0,
550 pubkey->key_class, pubkey->key_ttl, mctx);
552 dst_key_free(&pubkey);
553 return (ISC_R_NOMEMORY);
556 if (key->func->parse == NULL)
557 RETERR(DST_R_UNSUPPORTEDALG);
559 newfilenamelen = strlen(filename) + 9;
561 newfilenamelen += strlen(dirname) + 1;
562 newfilename = isc_mem_get(mctx, newfilenamelen);
563 if (newfilename == NULL)
564 RETERR(ISC_R_NOMEMORY);
565 result = addsuffix(newfilename, newfilenamelen,
566 dirname, filename, ".private");
567 INSIST(result == ISC_R_SUCCESS);
569 RETERR(isc_lex_create(mctx, 1500, &lex));
570 RETERR(isc_lex_openfile(lex, newfilename));
571 isc_mem_put(mctx, newfilename, newfilenamelen);
573 RETERR(key->func->parse(key, lex, pubkey));
574 isc_lex_destroy(&lex);
576 RETERR(computeid(key));
578 if (pubkey->key_id != key->key_id)
579 RETERR(DST_R_INVALIDPRIVATEKEY);
580 dst_key_free(&pubkey);
583 return (ISC_R_SUCCESS);
587 dst_key_free(&pubkey);
588 if (newfilename != NULL)
589 isc_mem_put(mctx, newfilename, newfilenamelen);
591 isc_lex_destroy(&lex);
598 dst_key_todns(const dst_key_t *key, isc_buffer_t *target) {
599 REQUIRE(dst_initialized == ISC_TRUE);
600 REQUIRE(VALID_KEY(key));
601 REQUIRE(target != NULL);
603 CHECKALG(key->key_alg);
605 if (key->func->todns == NULL)
606 return (DST_R_UNSUPPORTEDALG);
608 if (isc_buffer_availablelength(target) < 4)
609 return (ISC_R_NOSPACE);
610 isc_buffer_putuint16(target, (isc_uint16_t)(key->key_flags & 0xffff));
611 isc_buffer_putuint8(target, (isc_uint8_t)key->key_proto);
612 isc_buffer_putuint8(target, (isc_uint8_t)key->key_alg);
614 if (key->key_flags & DNS_KEYFLAG_EXTENDED) {
615 if (isc_buffer_availablelength(target) < 2)
616 return (ISC_R_NOSPACE);
617 isc_buffer_putuint16(target,
618 (isc_uint16_t)((key->key_flags >> 16)
622 if (key->keydata.generic == NULL) /*%< NULL KEY */
623 return (ISC_R_SUCCESS);
625 return (key->func->todns(key, target));
629 dst_key_fromdns(dns_name_t *name, dns_rdataclass_t rdclass,
630 isc_buffer_t *source, isc_mem_t *mctx, dst_key_t **keyp)
632 isc_uint8_t alg, proto;
633 isc_uint32_t flags, extflags;
634 dst_key_t *key = NULL;
635 dns_keytag_t id, rid;
639 REQUIRE(dst_initialized);
641 isc_buffer_remainingregion(source, &r);
643 if (isc_buffer_remaininglength(source) < 4)
644 return (DST_R_INVALIDPUBLICKEY);
645 flags = isc_buffer_getuint16(source);
646 proto = isc_buffer_getuint8(source);
647 alg = isc_buffer_getuint8(source);
649 id = dst_region_computeid(&r, alg);
650 rid = dst_region_computerid(&r, alg);
652 if (flags & DNS_KEYFLAG_EXTENDED) {
653 if (isc_buffer_remaininglength(source) < 2)
654 return (DST_R_INVALIDPUBLICKEY);
655 extflags = isc_buffer_getuint16(source);
656 flags |= (extflags << 16);
659 result = frombuffer(name, alg, flags, proto, rdclass, source,
661 if (result != ISC_R_SUCCESS)
667 return (ISC_R_SUCCESS);
671 dst_key_frombuffer(dns_name_t *name, unsigned int alg,
672 unsigned int flags, unsigned int protocol,
673 dns_rdataclass_t rdclass,
674 isc_buffer_t *source, isc_mem_t *mctx, dst_key_t **keyp)
676 dst_key_t *key = NULL;
679 REQUIRE(dst_initialized);
681 result = frombuffer(name, alg, flags, protocol, rdclass, source,
683 if (result != ISC_R_SUCCESS)
686 result = computeid(key);
687 if (result != ISC_R_SUCCESS) {
693 return (ISC_R_SUCCESS);
697 dst_key_tobuffer(const dst_key_t *key, isc_buffer_t *target) {
698 REQUIRE(dst_initialized == ISC_TRUE);
699 REQUIRE(VALID_KEY(key));
700 REQUIRE(target != NULL);
702 CHECKALG(key->key_alg);
704 if (key->func->todns == NULL)
705 return (DST_R_UNSUPPORTEDALG);
707 return (key->func->todns(key, target));
711 dst_key_privatefrombuffer(dst_key_t *key, isc_buffer_t *buffer) {
712 isc_lex_t *lex = NULL;
713 isc_result_t result = ISC_R_SUCCESS;
715 REQUIRE(dst_initialized == ISC_TRUE);
716 REQUIRE(VALID_KEY(key));
717 REQUIRE(!dst_key_isprivate(key));
718 REQUIRE(buffer != NULL);
720 if (key->func->parse == NULL)
721 RETERR(DST_R_UNSUPPORTEDALG);
723 RETERR(isc_lex_create(key->mctx, 1500, &lex));
724 RETERR(isc_lex_openbuffer(lex, buffer));
725 RETERR(key->func->parse(key, lex, NULL));
728 isc_lex_destroy(&lex);
733 dst_key_getgssctx(const dst_key_t *key)
735 REQUIRE(key != NULL);
737 return (key->keydata.gssctx);
741 dst_key_fromgssapi(dns_name_t *name, gss_ctx_id_t gssctx, isc_mem_t *mctx,
742 dst_key_t **keyp, isc_region_t *intoken)
747 REQUIRE(gssctx != NULL);
748 REQUIRE(keyp != NULL && *keyp == NULL);
750 key = get_key_struct(name, DST_ALG_GSSAPI, 0, DNS_KEYPROTO_DNSSEC,
751 0, dns_rdataclass_in, 0, mctx);
753 return (ISC_R_NOMEMORY);
755 if (intoken != NULL) {
757 * Keep the token for use by external ssu rules. They may need
758 * to examine the PAC in the kerberos ticket.
760 RETERR(isc_buffer_allocate(key->mctx, &key->key_tkeytoken,
762 RETERR(isc_buffer_copyregion(key->key_tkeytoken, intoken));
765 key->keydata.gssctx = gssctx;
767 result = ISC_R_SUCCESS;
773 dst_key_buildinternal(dns_name_t *name, unsigned int alg,
774 unsigned int bits, unsigned int flags,
775 unsigned int protocol, dns_rdataclass_t rdclass,
776 void *data, isc_mem_t *mctx, dst_key_t **keyp)
781 REQUIRE(dst_initialized == ISC_TRUE);
782 REQUIRE(dns_name_isabsolute(name));
783 REQUIRE(mctx != NULL);
784 REQUIRE(keyp != NULL && *keyp == NULL);
785 REQUIRE(data != NULL);
789 key = get_key_struct(name, alg, flags, protocol, bits, rdclass,
792 return (ISC_R_NOMEMORY);
794 key->keydata.generic = data;
796 result = computeid(key);
797 if (result != ISC_R_SUCCESS) {
803 return (ISC_R_SUCCESS);
807 dst_key_fromlabel(dns_name_t *name, int alg, unsigned int flags,
808 unsigned int protocol, dns_rdataclass_t rdclass,
809 const char *engine, const char *label, const char *pin,
810 isc_mem_t *mctx, dst_key_t **keyp)
815 REQUIRE(dst_initialized == ISC_TRUE);
816 REQUIRE(dns_name_isabsolute(name));
817 REQUIRE(mctx != NULL);
818 REQUIRE(keyp != NULL && *keyp == NULL);
819 REQUIRE(label != NULL);
823 key = get_key_struct(name, alg, flags, protocol, 0, rdclass, 0, mctx);
825 return (ISC_R_NOMEMORY);
827 if (key->func->fromlabel == NULL) {
829 return (DST_R_UNSUPPORTEDALG);
832 result = key->func->fromlabel(key, engine, label, pin);
833 if (result != ISC_R_SUCCESS) {
838 result = computeid(key);
839 if (result != ISC_R_SUCCESS) {
845 return (ISC_R_SUCCESS);
849 dst_key_generate(dns_name_t *name, unsigned int alg,
850 unsigned int bits, unsigned int param,
851 unsigned int flags, unsigned int protocol,
852 dns_rdataclass_t rdclass,
853 isc_mem_t *mctx, dst_key_t **keyp)
855 return (dst_key_generate2(name, alg, bits, param, flags, protocol,
856 rdclass, mctx, keyp, NULL));
860 dst_key_generate2(dns_name_t *name, unsigned int alg,
861 unsigned int bits, unsigned int param,
862 unsigned int flags, unsigned int protocol,
863 dns_rdataclass_t rdclass,
864 isc_mem_t *mctx, dst_key_t **keyp,
865 void (*callback)(int))
870 REQUIRE(dst_initialized == ISC_TRUE);
871 REQUIRE(dns_name_isabsolute(name));
872 REQUIRE(mctx != NULL);
873 REQUIRE(keyp != NULL && *keyp == NULL);
877 key = get_key_struct(name, alg, flags, protocol, bits,
880 return (ISC_R_NOMEMORY);
882 if (bits == 0) { /*%< NULL KEY */
883 key->key_flags |= DNS_KEYTYPE_NOKEY;
885 return (ISC_R_SUCCESS);
888 if (key->func->generate == NULL) {
890 return (DST_R_UNSUPPORTEDALG);
893 ret = key->func->generate(key, param, callback);
894 if (ret != ISC_R_SUCCESS) {
899 ret = computeid(key);
900 if (ret != ISC_R_SUCCESS) {
906 return (ISC_R_SUCCESS);
910 dst_key_getnum(const dst_key_t *key, int type, isc_uint32_t *valuep)
912 REQUIRE(VALID_KEY(key));
913 REQUIRE(valuep != NULL);
914 REQUIRE(type <= DST_MAX_NUMERIC);
915 if (!key->numset[type])
916 return (ISC_R_NOTFOUND);
917 *valuep = key->nums[type];
918 return (ISC_R_SUCCESS);
922 dst_key_setnum(dst_key_t *key, int type, isc_uint32_t value)
924 REQUIRE(VALID_KEY(key));
925 REQUIRE(type <= DST_MAX_NUMERIC);
926 key->nums[type] = value;
927 key->numset[type] = ISC_TRUE;
931 dst_key_unsetnum(dst_key_t *key, int type)
933 REQUIRE(VALID_KEY(key));
934 REQUIRE(type <= DST_MAX_NUMERIC);
935 key->numset[type] = ISC_FALSE;
939 dst_key_gettime(const dst_key_t *key, int type, isc_stdtime_t *timep) {
940 REQUIRE(VALID_KEY(key));
941 REQUIRE(timep != NULL);
942 REQUIRE(type <= DST_MAX_TIMES);
943 if (!key->timeset[type])
944 return (ISC_R_NOTFOUND);
945 *timep = key->times[type];
946 return (ISC_R_SUCCESS);
950 dst_key_settime(dst_key_t *key, int type, isc_stdtime_t when) {
951 REQUIRE(VALID_KEY(key));
952 REQUIRE(type <= DST_MAX_TIMES);
953 key->times[type] = when;
954 key->timeset[type] = ISC_TRUE;
958 dst_key_unsettime(dst_key_t *key, int type) {
959 REQUIRE(VALID_KEY(key));
960 REQUIRE(type <= DST_MAX_TIMES);
961 key->timeset[type] = ISC_FALSE;
965 dst_key_getprivateformat(const dst_key_t *key, int *majorp, int *minorp) {
966 REQUIRE(VALID_KEY(key));
967 REQUIRE(majorp != NULL);
968 REQUIRE(minorp != NULL);
969 *majorp = key->fmt_major;
970 *minorp = key->fmt_minor;
971 return (ISC_R_SUCCESS);
975 dst_key_setprivateformat(dst_key_t *key, int major, int minor) {
976 REQUIRE(VALID_KEY(key));
977 key->fmt_major = major;
978 key->fmt_minor = minor;
982 comparekeys(const dst_key_t *key1, const dst_key_t *key2,
983 isc_boolean_t match_revoked_key,
984 isc_boolean_t (*compare)(const dst_key_t *key1,
985 const dst_key_t *key2))
987 REQUIRE(dst_initialized == ISC_TRUE);
988 REQUIRE(VALID_KEY(key1));
989 REQUIRE(VALID_KEY(key2));
994 if (key1 == NULL || key2 == NULL)
997 if (key1->key_alg != key2->key_alg)
1000 if (key1->key_id != key2->key_id) {
1001 if (!match_revoked_key)
1003 if (key1->key_alg == DST_ALG_RSAMD5)
1005 if ((key1->key_flags & DNS_KEYFLAG_REVOKE) ==
1006 (key2->key_flags & DNS_KEYFLAG_REVOKE))
1008 if (key1->key_id != key2->key_rid &&
1009 key1->key_rid != key2->key_id)
1013 if (compare != NULL)
1014 return (compare(key1, key2));
1021 * Compares only the public portion of two keys, by converting them
1022 * both to wire format and comparing the results.
1024 static isc_boolean_t
1025 pub_compare(const dst_key_t *key1, const dst_key_t *key2) {
1026 isc_result_t result;
1027 unsigned char buf1[DST_KEY_MAXSIZE], buf2[DST_KEY_MAXSIZE];
1028 isc_buffer_t b1, b2;
1029 isc_region_t r1, r2;
1031 isc_buffer_init(&b1, buf1, sizeof(buf1));
1032 result = dst_key_todns(key1, &b1);
1033 if (result != ISC_R_SUCCESS)
1035 /* Zero out flags. */
1036 buf1[0] = buf1[1] = 0;
1037 if ((key1->key_flags & DNS_KEYFLAG_EXTENDED) != 0)
1038 isc_buffer_subtract(&b1, 2);
1040 isc_buffer_init(&b2, buf2, sizeof(buf2));
1041 result = dst_key_todns(key2, &b2);
1042 if (result != ISC_R_SUCCESS)
1044 /* Zero out flags. */
1045 buf2[0] = buf2[1] = 0;
1046 if ((key2->key_flags & DNS_KEYFLAG_EXTENDED) != 0)
1047 isc_buffer_subtract(&b2, 2);
1049 isc_buffer_usedregion(&b1, &r1);
1050 /* Remove extended flags. */
1051 if ((key1->key_flags & DNS_KEYFLAG_EXTENDED) != 0) {
1052 memmove(&buf1[4], &buf1[6], r1.length - 6);
1056 isc_buffer_usedregion(&b2, &r2);
1057 /* Remove extended flags. */
1058 if ((key2->key_flags & DNS_KEYFLAG_EXTENDED) != 0) {
1059 memmove(&buf2[4], &buf2[6], r2.length - 6);
1062 return (ISC_TF(isc_region_compare(&r1, &r2) == 0));
1066 dst_key_compare(const dst_key_t *key1, const dst_key_t *key2) {
1067 return (comparekeys(key1, key2, ISC_FALSE, key1->func->compare));
1071 dst_key_pubcompare(const dst_key_t *key1, const dst_key_t *key2,
1072 isc_boolean_t match_revoked_key)
1074 return (comparekeys(key1, key2, match_revoked_key, pub_compare));
1079 dst_key_paramcompare(const dst_key_t *key1, const dst_key_t *key2) {
1080 REQUIRE(dst_initialized == ISC_TRUE);
1081 REQUIRE(VALID_KEY(key1));
1082 REQUIRE(VALID_KEY(key2));
1086 if (key1 == NULL || key2 == NULL)
1088 if (key1->key_alg == key2->key_alg &&
1089 key1->func->paramcompare != NULL &&
1090 key1->func->paramcompare(key1, key2) == ISC_TRUE)
1097 dst_key_attach(dst_key_t *source, dst_key_t **target) {
1099 REQUIRE(dst_initialized == ISC_TRUE);
1100 REQUIRE(target != NULL && *target == NULL);
1101 REQUIRE(VALID_KEY(source));
1103 isc_refcount_increment(&source->refs, NULL);
1108 dst_key_free(dst_key_t **keyp) {
1113 REQUIRE(dst_initialized == ISC_TRUE);
1114 REQUIRE(keyp != NULL && VALID_KEY(*keyp));
1119 isc_refcount_decrement(&key->refs, &refs);
1123 isc_refcount_destroy(&key->refs);
1124 if (key->keydata.generic != NULL) {
1125 INSIST(key->func->destroy != NULL);
1126 key->func->destroy(key);
1128 if (key->engine != NULL)
1129 isc_mem_free(mctx, key->engine);
1130 if (key->label != NULL)
1131 isc_mem_free(mctx, key->label);
1132 dns_name_free(key->key_name, mctx);
1133 isc_mem_put(mctx, key->key_name, sizeof(dns_name_t));
1134 if (key->key_tkeytoken) {
1135 isc_buffer_free(&key->key_tkeytoken);
1137 memset(key, 0, sizeof(dst_key_t));
1138 isc_mem_putanddetach(&mctx, key, sizeof(dst_key_t));
1143 dst_key_isprivate(const dst_key_t *key) {
1144 REQUIRE(VALID_KEY(key));
1145 INSIST(key->func->isprivate != NULL);
1146 return (key->func->isprivate(key));
1150 dst_key_buildfilename(const dst_key_t *key, int type,
1151 const char *directory, isc_buffer_t *out) {
1153 REQUIRE(VALID_KEY(key));
1154 REQUIRE(type == DST_TYPE_PRIVATE || type == DST_TYPE_PUBLIC ||
1157 return (buildfilename(key->key_name, key->key_id, key->key_alg,
1158 type, directory, out));
1162 dst_key_sigsize(const dst_key_t *key, unsigned int *n) {
1163 REQUIRE(dst_initialized == ISC_TRUE);
1164 REQUIRE(VALID_KEY(key));
1167 /* XXXVIX this switch statement is too sparse to gen a jump table. */
1168 switch (key->key_alg) {
1169 case DST_ALG_RSAMD5:
1170 case DST_ALG_RSASHA1:
1171 case DST_ALG_NSEC3RSASHA1:
1172 case DST_ALG_RSASHA256:
1173 case DST_ALG_RSASHA512:
1174 *n = (key->key_size + 7) / 8;
1177 case DST_ALG_NSEC3DSA:
1178 *n = DNS_SIG_DSASIGSIZE;
1180 case DST_ALG_ECCGOST:
1181 *n = DNS_SIG_GOSTSIGSIZE;
1183 case DST_ALG_ECDSA256:
1184 *n = DNS_SIG_ECDSA256SIZE;
1186 case DST_ALG_ECDSA384:
1187 *n = DNS_SIG_ECDSA384SIZE;
1189 case DST_ALG_HMACMD5:
1192 case DST_ALG_HMACSHA1:
1193 *n = ISC_SHA1_DIGESTLENGTH;
1195 case DST_ALG_HMACSHA224:
1196 *n = ISC_SHA224_DIGESTLENGTH;
1198 case DST_ALG_HMACSHA256:
1199 *n = ISC_SHA256_DIGESTLENGTH;
1201 case DST_ALG_HMACSHA384:
1202 *n = ISC_SHA384_DIGESTLENGTH;
1204 case DST_ALG_HMACSHA512:
1205 *n = ISC_SHA512_DIGESTLENGTH;
1207 case DST_ALG_GSSAPI:
1208 *n = 128; /*%< XXX */
1212 return (DST_R_UNSUPPORTEDALG);
1214 return (ISC_R_SUCCESS);
1218 dst_key_secretsize(const dst_key_t *key, unsigned int *n) {
1219 REQUIRE(dst_initialized == ISC_TRUE);
1220 REQUIRE(VALID_KEY(key));
1223 if (key->key_alg == DST_ALG_DH)
1224 *n = (key->key_size + 7) / 8;
1226 return (DST_R_UNSUPPORTEDALG);
1227 return (ISC_R_SUCCESS);
1231 * Set the flags on a key, then recompute the key ID
1234 dst_key_setflags(dst_key_t *key, isc_uint32_t flags) {
1235 REQUIRE(VALID_KEY(key));
1236 key->key_flags = flags;
1237 return (computeid(key));
1241 dst_key_format(const dst_key_t *key, char *cp, unsigned int size) {
1242 char namestr[DNS_NAME_FORMATSIZE];
1243 char algstr[DNS_NAME_FORMATSIZE];
1245 dns_name_format(dst_key_name(key), namestr, sizeof(namestr));
1246 dns_secalg_format((dns_secalg_t) dst_key_alg(key), algstr,
1248 snprintf(cp, size, "%s/%s/%d", namestr, algstr, dst_key_id(key));
1252 dst_key_dump(dst_key_t *key, isc_mem_t *mctx, char **buffer, int *length) {
1254 REQUIRE(buffer != NULL && *buffer == NULL);
1255 REQUIRE(length != NULL && *length == 0);
1256 REQUIRE(VALID_KEY(key));
1258 if (key->func->dump == NULL)
1259 return (ISC_R_NOTIMPLEMENTED);
1260 return (key->func->dump(key, mctx, buffer, length));
1264 dst_key_restore(dns_name_t *name, unsigned int alg, unsigned int flags,
1265 unsigned int protocol, dns_rdataclass_t rdclass,
1266 isc_mem_t *mctx, const char *keystr, dst_key_t **keyp)
1268 isc_result_t result;
1271 REQUIRE(dst_initialized == ISC_TRUE);
1272 REQUIRE(keyp != NULL && *keyp == NULL);
1274 if (alg >= DST_MAX_ALGS || dst_t_func[alg] == NULL)
1275 return (DST_R_UNSUPPORTEDALG);
1277 if (dst_t_func[alg]->restore == NULL)
1278 return (ISC_R_NOTIMPLEMENTED);
1280 key = get_key_struct(name, alg, flags, protocol, 0, rdclass, 0, mctx);
1282 return (ISC_R_NOMEMORY);
1284 result = (dst_t_func[alg]->restore)(key, keystr);
1285 if (result == ISC_R_SUCCESS)
1298 * Allocates a key structure and fills in some of the fields.
1301 get_key_struct(dns_name_t *name, unsigned int alg,
1302 unsigned int flags, unsigned int protocol,
1303 unsigned int bits, dns_rdataclass_t rdclass,
1304 dns_ttl_t ttl, isc_mem_t *mctx)
1307 isc_result_t result;
1310 key = (dst_key_t *) isc_mem_get(mctx, sizeof(dst_key_t));
1314 memset(key, 0, sizeof(dst_key_t));
1316 key->key_name = isc_mem_get(mctx, sizeof(dns_name_t));
1317 if (key->key_name == NULL) {
1318 isc_mem_put(mctx, key, sizeof(dst_key_t));
1322 dns_name_init(key->key_name, NULL);
1323 result = dns_name_dup(name, mctx, key->key_name);
1324 if (result != ISC_R_SUCCESS) {
1325 isc_mem_put(mctx, key->key_name, sizeof(dns_name_t));
1326 isc_mem_put(mctx, key, sizeof(dst_key_t));
1330 result = isc_refcount_init(&key->refs, 1);
1331 if (result != ISC_R_SUCCESS) {
1332 dns_name_free(key->key_name, mctx);
1333 isc_mem_put(mctx, key->key_name, sizeof(dns_name_t));
1334 isc_mem_put(mctx, key, sizeof(dst_key_t));
1337 isc_mem_attach(mctx, &key->mctx);
1339 key->key_flags = flags;
1340 key->key_proto = protocol;
1341 key->keydata.generic = NULL;
1342 key->key_size = bits;
1343 key->key_class = rdclass;
1345 key->func = dst_t_func[alg];
1348 for (i = 0; i < (DST_MAX_TIMES + 1); i++) {
1350 key->timeset[i] = ISC_FALSE;
1352 key->magic = KEY_MAGIC;
1357 * Reads a public key from disk
1360 dst_key_read_public(const char *filename, int type,
1361 isc_mem_t *mctx, dst_key_t **keyp)
1363 u_char rdatabuf[DST_KEY_MAXSIZE];
1365 dns_fixedname_t name;
1366 isc_lex_t *lex = NULL;
1369 dns_rdata_t rdata = DNS_RDATA_INIT;
1370 unsigned int opt = ISC_LEXOPT_DNSMULTILINE;
1371 dns_rdataclass_t rdclass = dns_rdataclass_in;
1372 isc_lexspecials_t specials;
1373 isc_uint32_t ttl = 0;
1374 isc_result_t result;
1375 dns_rdatatype_t keytype;
1378 * Open the file and read its formatted contents
1380 * domain.name [ttl] [class] [KEY|DNSKEY] <flags> <protocol> <algorithm> <key>
1383 /* 1500 should be large enough for any key */
1384 ret = isc_lex_create(mctx, 1500, &lex);
1385 if (ret != ISC_R_SUCCESS)
1388 memset(specials, 0, sizeof(specials));
1392 isc_lex_setspecials(lex, specials);
1393 isc_lex_setcomments(lex, ISC_LEXCOMMENT_DNSMASTERFILE);
1395 ret = isc_lex_openfile(lex, filename);
1396 if (ret != ISC_R_SUCCESS)
1399 #define NEXTTOKEN(lex, opt, token) { \
1400 ret = isc_lex_gettoken(lex, opt, token); \
1401 if (ret != ISC_R_SUCCESS) \
1405 #define BADTOKEN() { \
1406 ret = ISC_R_UNEXPECTEDTOKEN; \
1410 /* Read the domain name */
1411 NEXTTOKEN(lex, opt, &token);
1412 if (token.type != isc_tokentype_string)
1416 * We don't support "@" in .key files.
1418 if (!strcmp(DST_AS_STR(token), "@"))
1421 dns_fixedname_init(&name);
1422 isc_buffer_init(&b, DST_AS_STR(token), strlen(DST_AS_STR(token)));
1423 isc_buffer_add(&b, strlen(DST_AS_STR(token)));
1424 ret = dns_name_fromtext(dns_fixedname_name(&name), &b, dns_rootname,
1426 if (ret != ISC_R_SUCCESS)
1429 /* Read the next word: either TTL, class, or 'KEY' */
1430 NEXTTOKEN(lex, opt, &token);
1432 if (token.type != isc_tokentype_string)
1435 /* If it's a TTL, read the next one */
1436 result = dns_ttl_fromtext(&token.value.as_textregion, &ttl);
1437 if (result == ISC_R_SUCCESS)
1438 NEXTTOKEN(lex, opt, &token);
1440 if (token.type != isc_tokentype_string)
1443 ret = dns_rdataclass_fromtext(&rdclass, &token.value.as_textregion);
1444 if (ret == ISC_R_SUCCESS)
1445 NEXTTOKEN(lex, opt, &token);
1447 if (token.type != isc_tokentype_string)
1450 if (strcasecmp(DST_AS_STR(token), "DNSKEY") == 0)
1451 keytype = dns_rdatatype_dnskey;
1452 else if (strcasecmp(DST_AS_STR(token), "KEY") == 0)
1453 keytype = dns_rdatatype_key; /*%< SIG(0), TKEY */
1457 if (((type & DST_TYPE_KEY) != 0 && keytype != dns_rdatatype_key) ||
1458 ((type & DST_TYPE_KEY) == 0 && keytype != dns_rdatatype_dnskey)) {
1459 ret = DST_R_BADKEYTYPE;
1463 isc_buffer_init(&b, rdatabuf, sizeof(rdatabuf));
1464 ret = dns_rdata_fromtext(&rdata, rdclass, keytype, lex, NULL,
1465 ISC_FALSE, mctx, &b, NULL);
1466 if (ret != ISC_R_SUCCESS)
1469 ret = dst_key_fromdns(dns_fixedname_name(&name), rdclass, &b, mctx,
1471 if (ret != ISC_R_SUCCESS)
1474 dst_key_setttl(*keyp, ttl);
1478 isc_lex_destroy(&lex);
1482 static isc_boolean_t
1483 issymmetric(const dst_key_t *key) {
1484 REQUIRE(dst_initialized == ISC_TRUE);
1485 REQUIRE(VALID_KEY(key));
1487 /* XXXVIX this switch statement is too sparse to gen a jump table. */
1488 switch (key->key_alg) {
1489 case DST_ALG_RSAMD5:
1490 case DST_ALG_RSASHA1:
1491 case DST_ALG_NSEC3RSASHA1:
1492 case DST_ALG_RSASHA256:
1493 case DST_ALG_RSASHA512:
1495 case DST_ALG_NSEC3DSA:
1497 case DST_ALG_ECCGOST:
1498 case DST_ALG_ECDSA256:
1499 case DST_ALG_ECDSA384:
1501 case DST_ALG_HMACMD5:
1502 case DST_ALG_GSSAPI:
1510 * Write key timing metadata to a file pointer, preceded by 'tag'
1513 printtime(const dst_key_t *key, int type, const char *tag, FILE *stream) {
1514 isc_result_t result;
1515 #ifdef ISC_PLATFORM_USETHREADS
1516 char output[26]; /* Minimum buffer as per ctime_r() specification. */
1522 char utc[sizeof("YYYYMMDDHHSSMM")];
1526 result = dst_key_gettime(key, type, &when);
1527 if (result == ISC_R_NOTFOUND)
1530 /* time_t and isc_stdtime_t might be different sizes */
1532 #ifdef ISC_PLATFORM_USETHREADS
1534 if (ctime_s(output, sizeof(output), &t) != 0)
1537 if (ctime_r(&t, output) == NULL)
1544 isc_buffer_init(&b, utc, sizeof(utc));
1545 result = dns_time32_totext(when, &b);
1546 if (result != ISC_R_SUCCESS)
1549 isc_buffer_usedregion(&b, &r);
1550 fprintf(stream, "%s: %.*s (%.*s)\n", tag, (int)r.length, r.base,
1551 (int)strlen(output) - 1, output);
1555 fprintf(stream, "%s: (set, unable to display)\n", tag);
1559 * Writes a public key to disk in DNS format.
1562 write_public_key(const dst_key_t *key, int type, const char *directory) {
1564 isc_buffer_t keyb, textb, fileb, classb;
1566 char filename[ISC_DIR_NAMEMAX];
1567 unsigned char key_array[DST_KEY_MAXSIZE];
1568 char text_array[DST_KEY_MAXTEXTSIZE];
1569 char class_array[10];
1571 dns_rdata_t rdata = DNS_RDATA_INIT;
1572 isc_fsaccess_t access;
1574 REQUIRE(VALID_KEY(key));
1576 isc_buffer_init(&keyb, key_array, sizeof(key_array));
1577 isc_buffer_init(&textb, text_array, sizeof(text_array));
1578 isc_buffer_init(&classb, class_array, sizeof(class_array));
1580 ret = dst_key_todns(key, &keyb);
1581 if (ret != ISC_R_SUCCESS)
1584 isc_buffer_usedregion(&keyb, &r);
1585 dns_rdata_fromregion(&rdata, key->key_class, dns_rdatatype_dnskey, &r);
1587 ret = dns_rdata_totext(&rdata, (dns_name_t *) NULL, &textb);
1588 if (ret != ISC_R_SUCCESS)
1589 return (DST_R_INVALIDPUBLICKEY);
1591 ret = dns_rdataclass_totext(key->key_class, &classb);
1592 if (ret != ISC_R_SUCCESS)
1593 return (DST_R_INVALIDPUBLICKEY);
1596 * Make the filename.
1598 isc_buffer_init(&fileb, filename, sizeof(filename));
1599 ret = dst_key_buildfilename(key, DST_TYPE_PUBLIC, directory, &fileb);
1600 if (ret != ISC_R_SUCCESS)
1604 * Create public key file.
1606 if ((fp = fopen(filename, "w")) == NULL)
1607 return (DST_R_WRITEERROR);
1609 if (issymmetric(key)) {
1611 isc_fsaccess_add(ISC_FSACCESS_OWNER,
1612 ISC_FSACCESS_READ | ISC_FSACCESS_WRITE,
1614 (void)isc_fsaccess_set(filename, access);
1617 /* Write key information in comments */
1618 if ((type & DST_TYPE_KEY) == 0) {
1619 fprintf(fp, "; This is a %s%s-signing key, keyid %d, for ",
1620 (key->key_flags & DNS_KEYFLAG_REVOKE) != 0 ?
1623 (key->key_flags & DNS_KEYFLAG_KSK) != 0 ?
1627 ret = dns_name_print(key->key_name, fp);
1628 if (ret != ISC_R_SUCCESS) {
1634 printtime(key, DST_TIME_CREATED, "; Created", fp);
1635 printtime(key, DST_TIME_PUBLISH, "; Publish", fp);
1636 printtime(key, DST_TIME_ACTIVATE, "; Activate", fp);
1637 printtime(key, DST_TIME_REVOKE, "; Revoke", fp);
1638 printtime(key, DST_TIME_INACTIVE, "; Inactive", fp);
1639 printtime(key, DST_TIME_DELETE, "; Delete", fp);
1642 /* Now print the actual key */
1643 ret = dns_name_print(key->key_name, fp);
1646 if (key->key_ttl != 0)
1647 fprintf(fp, "%d ", key->key_ttl);
1649 isc_buffer_usedregion(&classb, &r);
1650 if ((unsigned) fwrite(r.base, 1, r.length, fp) != r.length)
1651 ret = DST_R_WRITEERROR;
1653 if ((type & DST_TYPE_KEY) != 0)
1654 fprintf(fp, " KEY ");
1656 fprintf(fp, " DNSKEY ");
1658 isc_buffer_usedregion(&textb, &r);
1659 if ((unsigned) fwrite(r.base, 1, r.length, fp) != r.length)
1660 ret = DST_R_WRITEERROR;
1665 ret = DST_R_WRITEERROR;
1672 buildfilename(dns_name_t *name, dns_keytag_t id,
1673 unsigned int alg, unsigned int type,
1674 const char *directory, isc_buffer_t *out)
1676 const char *suffix = "";
1678 isc_result_t result;
1680 REQUIRE(out != NULL);
1681 if ((type & DST_TYPE_PRIVATE) != 0)
1682 suffix = ".private";
1683 else if (type == DST_TYPE_PUBLIC)
1685 if (directory != NULL) {
1686 if (isc_buffer_availablelength(out) < strlen(directory))
1687 return (ISC_R_NOSPACE);
1688 isc_buffer_putstr(out, directory);
1689 if (strlen(directory) > 0U &&
1690 directory[strlen(directory) - 1] != '/')
1691 isc_buffer_putstr(out, "/");
1693 if (isc_buffer_availablelength(out) < 1)
1694 return (ISC_R_NOSPACE);
1695 isc_buffer_putstr(out, "K");
1696 result = dns_name_tofilenametext(name, ISC_FALSE, out);
1697 if (result != ISC_R_SUCCESS)
1699 len = 1 + 3 + 1 + 5 + strlen(suffix) + 1;
1700 if (isc_buffer_availablelength(out) < len)
1701 return (ISC_R_NOSPACE);
1702 sprintf((char *) isc_buffer_used(out), "+%03d+%05d%s", alg, id,
1704 isc_buffer_add(out, len);
1706 return (ISC_R_SUCCESS);
1710 computeid(dst_key_t *key) {
1711 isc_buffer_t dnsbuf;
1712 unsigned char dns_array[DST_KEY_MAXSIZE];
1716 isc_buffer_init(&dnsbuf, dns_array, sizeof(dns_array));
1717 ret = dst_key_todns(key, &dnsbuf);
1718 if (ret != ISC_R_SUCCESS)
1721 isc_buffer_usedregion(&dnsbuf, &r);
1722 key->key_id = dst_region_computeid(&r, key->key_alg);
1723 key->key_rid = dst_region_computerid(&r, key->key_alg);
1724 return (ISC_R_SUCCESS);
1728 frombuffer(dns_name_t *name, unsigned int alg, unsigned int flags,
1729 unsigned int protocol, dns_rdataclass_t rdclass,
1730 isc_buffer_t *source, isc_mem_t *mctx, dst_key_t **keyp)
1735 REQUIRE(dns_name_isabsolute(name));
1736 REQUIRE(source != NULL);
1737 REQUIRE(mctx != NULL);
1738 REQUIRE(keyp != NULL && *keyp == NULL);
1740 key = get_key_struct(name, alg, flags, protocol, 0, rdclass, 0, mctx);
1742 return (ISC_R_NOMEMORY);
1744 if (isc_buffer_remaininglength(source) > 0) {
1745 ret = algorithm_status(alg);
1746 if (ret != ISC_R_SUCCESS) {
1750 if (key->func->fromdns == NULL) {
1752 return (DST_R_UNSUPPORTEDALG);
1755 ret = key->func->fromdns(key, source);
1756 if (ret != ISC_R_SUCCESS) {
1763 return (ISC_R_SUCCESS);
1767 algorithm_status(unsigned int alg) {
1768 REQUIRE(dst_initialized == ISC_TRUE);
1770 if (dst_algorithm_supported(alg))
1771 return (ISC_R_SUCCESS);
1773 if (alg == DST_ALG_RSAMD5 || alg == DST_ALG_RSASHA1 ||
1774 alg == DST_ALG_DSA || alg == DST_ALG_DH ||
1775 alg == DST_ALG_HMACMD5 || alg == DST_ALG_NSEC3DSA ||
1776 alg == DST_ALG_NSEC3RSASHA1 ||
1777 alg == DST_ALG_RSASHA256 || alg == DST_ALG_RSASHA512 ||
1778 alg == DST_ALG_ECCGOST ||
1779 alg == DST_ALG_ECDSA256 || alg == DST_ALG_ECDSA384)
1780 return (DST_R_NOCRYPTO);
1782 return (DST_R_UNSUPPORTEDALG);
1786 addsuffix(char *filename, int len, const char *odirname,
1787 const char *ofilename, const char *suffix)
1789 int olen = strlen(ofilename);
1792 if (olen > 1 && ofilename[olen - 1] == '.')
1794 else if (olen > 8 && strcmp(ofilename + olen - 8, ".private") == 0)
1796 else if (olen > 4 && strcmp(ofilename + olen - 4, ".key") == 0)
1799 if (odirname == NULL)
1800 n = snprintf(filename, len, "%.*s%s", olen, ofilename, suffix);
1802 n = snprintf(filename, len, "%s/%.*s%s",
1803 odirname, olen, ofilename, suffix);
1805 return (ISC_R_FAILURE);
1807 return (ISC_R_NOSPACE);
1808 return (ISC_R_SUCCESS);
1812 dst__entropy_getdata(void *buf, unsigned int len, isc_boolean_t pseudo) {
1814 unsigned int flags = dst_entropy_flags;
1817 return (ISC_R_SUCCESS);
1819 flags &= ~ISC_ENTROPY_GOODONLY;
1821 flags |= ISC_ENTROPY_BLOCKING;
1822 return (isc_entropy_getdata(dst_entropy_pool, buf, len, NULL, flags));
1828 return (ISC_R_NOTIMPLEMENTED);
1833 dst__entropy_status(void) {
1836 unsigned int flags = dst_entropy_flags;
1838 unsigned char buf[32];
1839 static isc_boolean_t first = ISC_TRUE;
1842 /* Someone believes RAND_status() initializes the PRNG */
1843 flags &= ~ISC_ENTROPY_GOODONLY;
1844 ret = isc_entropy_getdata(dst_entropy_pool, buf,
1845 sizeof(buf), NULL, flags);
1846 INSIST(ret == ISC_R_SUCCESS);
1847 isc_entropy_putdata(dst_entropy_pool, buf,
1848 sizeof(buf), 2 * sizeof(buf));
1852 return (isc_entropy_status(dst_entropy_pool));
1859 dst_key_tkeytoken(const dst_key_t *key) {
1860 REQUIRE(VALID_KEY(key));
1861 return (key->key_tkeytoken);