2 * Portions Copyright (C) 2004-2009, 2011-2013 Internet Systems Consortium, Inc. ("ISC")
3 * Portions Copyright (C) 1999-2002 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: openssldh_link.c,v 1.20 2011/01/11 23:47:13 tbox Exp $
44 #include <isc/string.h>
47 #include <dst/result.h>
49 #include "dst_internal.h"
50 #include "dst_openssl.h"
51 #include "dst_parse.h"
53 #define PRIME768 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088" \
54 "A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25" \
55 "F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF"
57 #define PRIME1024 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" \
58 "8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF2" \
59 "5F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406" \
60 "B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF"
62 #define PRIME1536 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" \
63 "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" \
64 "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" \
65 "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" \
66 "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D" \
67 "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F" \
68 "83655D23DCA3AD961C62F356208552BB9ED529077096966D" \
69 "670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF"
72 static isc_result_t openssldh_todns(const dst_key_t *key, isc_buffer_t *data);
74 static BIGNUM bn2, bn768, bn1024, bn1536;
77 openssldh_computesecret(const dst_key_t *pub, const dst_key_t *priv,
85 REQUIRE(pub->keydata.dh != NULL);
86 REQUIRE(priv->keydata.dh != NULL);
88 dhpub = pub->keydata.dh;
89 dhpriv = priv->keydata.dh;
91 len = DH_size(dhpriv);
92 isc_buffer_availableregion(secret, &r);
94 return (ISC_R_NOSPACE);
95 ret = DH_compute_key(r.base, dhpub->pub_key, dhpriv);
97 return (dst__openssl_toresult2("DH_compute_key",
98 DST_R_COMPUTESECRETFAILURE));
99 isc_buffer_add(secret, len);
100 return (ISC_R_SUCCESS);
104 openssldh_compare(const dst_key_t *key1, const dst_key_t *key2) {
108 dh1 = key1->keydata.dh;
109 dh2 = key2->keydata.dh;
111 if (dh1 == NULL && dh2 == NULL)
113 else if (dh1 == NULL || dh2 == NULL)
116 status = BN_cmp(dh1->p, dh2->p) ||
117 BN_cmp(dh1->g, dh2->g) ||
118 BN_cmp(dh1->pub_key, dh2->pub_key);
123 if (dh1->priv_key != NULL || dh2->priv_key != NULL) {
124 if (dh1->priv_key == NULL || dh2->priv_key == NULL)
126 if (BN_cmp(dh1->priv_key, dh2->priv_key) != 0)
133 openssldh_paramcompare(const dst_key_t *key1, const dst_key_t *key2) {
137 dh1 = key1->keydata.dh;
138 dh2 = key2->keydata.dh;
140 if (dh1 == NULL && dh2 == NULL)
142 else if (dh1 == NULL || dh2 == NULL)
145 status = BN_cmp(dh1->p, dh2->p) ||
146 BN_cmp(dh1->g, dh2->g);
153 #if OPENSSL_VERSION_NUMBER > 0x00908000L
155 progress_cb(int p, int n, BN_GENCB *cb)
172 openssldh_generate(dst_key_t *key, int generator, void (*callback)(int)) {
174 #if OPENSSL_VERSION_NUMBER > 0x00908000L
185 if (generator == 0) {
186 if (key->key_size == 768 ||
187 key->key_size == 1024 ||
188 key->key_size == 1536)
192 return (dst__openssl_toresult(ISC_R_NOMEMORY));
193 if (key->key_size == 768)
195 else if (key->key_size == 1024)
204 if (generator != 0) {
205 #if OPENSSL_VERSION_NUMBER > 0x00908000L
208 return (dst__openssl_toresult(ISC_R_NOMEMORY));
210 if (callback == NULL) {
211 BN_GENCB_set_old(&cb, NULL, NULL);
214 BN_GENCB_set(&cb, &progress_cb, u.dptr);
217 if (!DH_generate_parameters_ex(dh, key->key_size, generator,
220 return (dst__openssl_toresult2(
221 "DH_generate_parameters_ex",
222 DST_R_OPENSSLFAILURE));
225 dh = DH_generate_parameters(key->key_size, generator,
231 return (dst__openssl_toresult2("DH_generate_parameters",
232 DST_R_OPENSSLFAILURE));
234 if (DH_generate_key(dh) == 0) {
236 return (dst__openssl_toresult2("DH_generate_key",
237 DST_R_OPENSSLFAILURE));
239 dh->flags &= ~DH_FLAG_CACHE_MONT_P;
241 key->keydata.dh = dh;
243 return (ISC_R_SUCCESS);
247 openssldh_isprivate(const dst_key_t *key) {
248 DH *dh = key->keydata.dh;
249 return (ISC_TF(dh != NULL && dh->priv_key != NULL));
253 openssldh_destroy(dst_key_t *key) {
254 DH *dh = key->keydata.dh;
259 if (dh->p == &bn768 || dh->p == &bn1024 || dh->p == &bn1536)
264 key->keydata.dh = NULL;
268 uint16_toregion(isc_uint16_t val, isc_region_t *region) {
269 *region->base = (val & 0xff00) >> 8;
270 isc_region_consume(region, 1);
271 *region->base = (val & 0x00ff);
272 isc_region_consume(region, 1);
276 uint16_fromregion(isc_region_t *region) {
278 unsigned char *cp = region->base;
280 val = ((unsigned int)(cp[0])) << 8;
281 val |= ((unsigned int)(cp[1]));
283 isc_region_consume(region, 2);
289 openssldh_todns(const dst_key_t *key, isc_buffer_t *data) {
292 isc_uint16_t dnslen, plen, glen, publen;
294 REQUIRE(key->keydata.dh != NULL);
296 dh = key->keydata.dh;
298 isc_buffer_availableregion(data, &r);
301 (dh->p == &bn768 || dh->p == &bn1024 || dh->p == &bn1536)) {
306 plen = BN_num_bytes(dh->p);
307 glen = BN_num_bytes(dh->g);
309 publen = BN_num_bytes(dh->pub_key);
310 dnslen = plen + glen + publen + 6;
311 if (r.length < (unsigned int) dnslen)
312 return (ISC_R_NOSPACE);
314 uint16_toregion(plen, &r);
318 else if (dh->p == &bn1024)
324 BN_bn2bin(dh->p, r.base);
325 isc_region_consume(&r, plen);
327 uint16_toregion(glen, &r);
329 BN_bn2bin(dh->g, r.base);
330 isc_region_consume(&r, glen);
332 uint16_toregion(publen, &r);
333 BN_bn2bin(dh->pub_key, r.base);
334 isc_region_consume(&r, publen);
336 isc_buffer_add(data, dnslen);
338 return (ISC_R_SUCCESS);
342 openssldh_fromdns(dst_key_t *key, isc_buffer_t *data) {
345 isc_uint16_t plen, glen, publen;
348 isc_buffer_remainingregion(data, &r);
350 return (ISC_R_SUCCESS);
354 return (dst__openssl_toresult(ISC_R_NOMEMORY));
355 dh->flags &= ~DH_FLAG_CACHE_MONT_P;
358 * Read the prime length. 1 & 2 are table entries, > 16 means a
359 * prime follows, otherwise an error.
363 return (DST_R_INVALIDPUBLICKEY);
365 plen = uint16_fromregion(&r);
366 if (plen < 16 && plen != 1 && plen != 2) {
368 return (DST_R_INVALIDPUBLICKEY);
370 if (r.length < plen) {
372 return (DST_R_INVALIDPUBLICKEY);
374 if (plen == 1 || plen == 2) {
377 isc_region_consume(&r, 1);
379 special = uint16_fromregion(&r);
393 return (DST_R_INVALIDPUBLICKEY);
396 dh->p = BN_bin2bn(r.base, plen, NULL);
397 isc_region_consume(&r, plen);
401 * Read the generator length. This should be 0 if the prime was
402 * special, but it might not be. If it's 0 and the prime is not
403 * special, we have a problem.
407 return (DST_R_INVALIDPUBLICKEY);
409 glen = uint16_fromregion(&r);
410 if (r.length < glen) {
412 return (DST_R_INVALIDPUBLICKEY);
418 dh->g = BN_bin2bn(r.base, glen, NULL);
419 if (BN_cmp(dh->g, &bn2) == 0) {
425 return (DST_R_INVALIDPUBLICKEY);
431 return (DST_R_INVALIDPUBLICKEY);
433 dh->g = BN_bin2bn(r.base, glen, NULL);
435 isc_region_consume(&r, glen);
439 return (DST_R_INVALIDPUBLICKEY);
441 publen = uint16_fromregion(&r);
442 if (r.length < publen) {
444 return (DST_R_INVALIDPUBLICKEY);
446 dh->pub_key = BN_bin2bn(r.base, publen, NULL);
447 isc_region_consume(&r, publen);
449 key->key_size = BN_num_bits(dh->p);
451 isc_buffer_forward(data, plen + glen + publen + 6);
453 key->keydata.dh = dh;
455 return (ISC_R_SUCCESS);
459 openssldh_tofile(const dst_key_t *key, const char *directory) {
463 unsigned char *bufs[4];
466 if (key->keydata.dh == NULL)
467 return (DST_R_NULLKEY);
469 dh = key->keydata.dh;
471 memset(bufs, 0, sizeof(bufs));
472 for (i = 0; i < 4; i++) {
473 bufs[i] = isc_mem_get(key->mctx, BN_num_bytes(dh->p));
474 if (bufs[i] == NULL) {
475 result = ISC_R_NOMEMORY;
482 priv.elements[i].tag = TAG_DH_PRIME;
483 priv.elements[i].length = BN_num_bytes(dh->p);
484 BN_bn2bin(dh->p, bufs[i]);
485 priv.elements[i].data = bufs[i];
488 priv.elements[i].tag = TAG_DH_GENERATOR;
489 priv.elements[i].length = BN_num_bytes(dh->g);
490 BN_bn2bin(dh->g, bufs[i]);
491 priv.elements[i].data = bufs[i];
494 priv.elements[i].tag = TAG_DH_PRIVATE;
495 priv.elements[i].length = BN_num_bytes(dh->priv_key);
496 BN_bn2bin(dh->priv_key, bufs[i]);
497 priv.elements[i].data = bufs[i];
500 priv.elements[i].tag = TAG_DH_PUBLIC;
501 priv.elements[i].length = BN_num_bytes(dh->pub_key);
502 BN_bn2bin(dh->pub_key, bufs[i]);
503 priv.elements[i].data = bufs[i];
507 result = dst__privstruct_writefile(key, &priv, directory);
509 for (i = 0; i < 4; i++) {
512 isc_mem_put(key->mctx, bufs[i], BN_num_bytes(dh->p));
518 openssldh_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
524 #define DST_RET(a) {ret = a; goto err;}
529 /* read private key file */
530 ret = dst__privstruct_parse(key, DST_ALG_DH, lexer, mctx, &priv);
531 if (ret != ISC_R_SUCCESS)
536 DST_RET(ISC_R_NOMEMORY);
537 dh->flags &= ~DH_FLAG_CACHE_MONT_P;
538 key->keydata.dh = dh;
540 for (i = 0; i < priv.nelements; i++) {
542 bn = BN_bin2bn(priv.elements[i].data,
543 priv.elements[i].length, NULL);
545 DST_RET(ISC_R_NOMEMORY);
547 switch (priv.elements[i].tag) {
551 case TAG_DH_GENERATOR:
562 dst__privstruct_free(&priv, mctx);
564 key->key_size = BN_num_bits(dh->p);
566 if ((key->key_size == 768 ||
567 key->key_size == 1024 ||
568 key->key_size == 1536) &&
569 BN_cmp(dh->g, &bn2) == 0)
571 if (key->key_size == 768 && BN_cmp(dh->p, &bn768) == 0) {
576 } else if (key->key_size == 1024 &&
577 BN_cmp(dh->p, &bn1024) == 0) {
582 } else if (key->key_size == 1536 &&
583 BN_cmp(dh->p, &bn1536) == 0) {
591 return (ISC_R_SUCCESS);
594 openssldh_destroy(key);
595 dst__privstruct_free(&priv, mctx);
596 memset(&priv, 0, sizeof(priv));
601 BN_fromhex(BIGNUM *b, const char *str) {
602 static const char hexdigits[] = "0123456789abcdef";
603 unsigned char data[512];
607 RUNTIME_CHECK(strlen(str) < 1024U && strlen(str) % 2 == 0U);
608 for (i = 0; i < strlen(str); i += 2) {
610 unsigned int high, low;
612 s = strchr(hexdigits, tolower((unsigned char)str[i]));
613 RUNTIME_CHECK(s != NULL);
614 high = (unsigned int)(s - hexdigits);
616 s = strchr(hexdigits, tolower((unsigned char)str[i + 1]));
617 RUNTIME_CHECK(s != NULL);
618 low = (unsigned int)(s - hexdigits);
620 data[i/2] = (unsigned char)((high << 4) + low);
622 out = BN_bin2bn(data, strlen(str)/2, b);
623 RUNTIME_CHECK(out != NULL);
627 openssldh_cleanup(void) {
634 static dst_func_t openssldh_functions = {
635 NULL, /*%< createctx */
636 NULL, /*%< destroyctx */
637 NULL, /*%< adddata */
638 NULL, /*%< openssldh_sign */
639 NULL, /*%< openssldh_verify */
640 NULL, /*%< openssldh_verify2 */
641 openssldh_computesecret,
643 openssldh_paramcompare,
652 NULL, /*%< fromlabel */
654 NULL, /*%< restore */
658 dst__openssldh_init(dst_func_t **funcp) {
659 REQUIRE(funcp != NULL);
660 if (*funcp == NULL) {
665 BN_set_word(&bn2, 2);
666 BN_fromhex(&bn768, PRIME768);
667 BN_fromhex(&bn1024, PRIME1024);
668 BN_fromhex(&bn1536, PRIME1536);
669 *funcp = &openssldh_functions;
671 return (ISC_R_SUCCESS);
676 #include <isc/util.h>
678 EMPTY_TRANSLATION_UNIT