2 * Copyright (C) 2004-2009, 2011 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000-2003 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 DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
19 * Principal Author: Brian Wellington
20 * $Id: opensslrsa_link.c,v 1.39.10.2 2011-03-11 02:57:35 marka Exp $
26 #if !defined(HAVE_EVP_SHA256) || !defined(HAVE_EVP_SHA512)
34 #include <isc/entropy.h>
39 #include <isc/string.h>
42 #include <dst/result.h>
44 #include "dst_internal.h"
45 #include "dst_openssl.h"
46 #include "dst_parse.h"
48 #include <openssl/err.h>
49 #include <openssl/objects.h>
50 #include <openssl/rsa.h>
51 #if OPENSSL_VERSION_NUMBER > 0x00908000L
52 #include <openssl/bn.h>
55 #include <openssl/engine.h>
59 * We don't use configure for windows so enforce the OpenSSL version
60 * here. Unlike with configure we don't support overriding this test.
63 #if !((OPENSSL_VERSION_NUMBER >= 0x009070cfL && \
64 OPENSSL_VERSION_NUMBER < 0x00908000L) || \
65 OPENSSL_VERSION_NUMBER >= 0x0090804fL)
66 #error Please upgrade OpenSSL to 0.9.8d/0.9.7l or greater.
72 * XXXMPA Temporarily disable RSA_BLINDING as it requires
73 * good quality random data that cannot currently be guaranteed.
74 * XXXMPA Find which versions of openssl use pseudo random data
75 * and set RSA_FLAG_BLINDING for those.
79 #if OPENSSL_VERSION_NUMBER < 0x0090601fL
80 #define SET_FLAGS(rsa) \
82 (rsa)->flags &= ~(RSA_FLAG_CACHE_PUBLIC | RSA_FLAG_CACHE_PRIVATE); \
83 (rsa)->flags |= RSA_FLAG_BLINDING; \
86 #define SET_FLAGS(rsa) \
88 (rsa)->flags |= RSA_FLAG_BLINDING; \
93 #if OPENSSL_VERSION_NUMBER < 0x0090601fL
94 #define SET_FLAGS(rsa) \
96 (rsa)->flags &= ~(RSA_FLAG_CACHE_PUBLIC | RSA_FLAG_CACHE_PRIVATE); \
97 (rsa)->flags &= ~RSA_FLAG_BLINDING; \
99 #elif defined(RSA_FLAG_NO_BLINDING)
100 #define SET_FLAGS(rsa) \
102 (rsa)->flags &= ~RSA_FLAG_BLINDING; \
103 (rsa)->flags |= RSA_FLAG_NO_BLINDING; \
106 #define SET_FLAGS(rsa) \
108 (rsa)->flags &= ~RSA_FLAG_BLINDING; \
112 #define DST_RET(a) {ret = a; goto err;}
114 static isc_result_t opensslrsa_todns(const dst_key_t *key, isc_buffer_t *data);
117 opensslrsa_createctx(dst_key_t *key, dst_context_t *dctx) {
119 EVP_MD_CTX *evp_md_ctx;
120 const EVP_MD *type = NULL;
124 REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
125 dctx->key->key_alg == DST_ALG_RSASHA1 ||
126 dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
127 dctx->key->key_alg == DST_ALG_RSASHA256 ||
128 dctx->key->key_alg == DST_ALG_RSASHA512);
131 evp_md_ctx = EVP_MD_CTX_create();
132 if (evp_md_ctx == NULL)
133 return (ISC_R_NOMEMORY);
135 switch (dctx->key->key_alg) {
137 type = EVP_md5(); /* MD5 + RSA */
139 case DST_ALG_RSASHA1:
140 case DST_ALG_NSEC3RSASHA1:
141 type = EVP_sha1(); /* SHA1 + RSA */
143 #ifdef HAVE_EVP_SHA256
144 case DST_ALG_RSASHA256:
145 type = EVP_sha256(); /* SHA256 + RSA */
148 #ifdef HAVE_EVP_SHA512
149 case DST_ALG_RSASHA512:
157 if (!EVP_DigestInit_ex(evp_md_ctx, type, NULL)) {
158 EVP_MD_CTX_destroy(evp_md_ctx);
159 return (ISC_R_FAILURE);
161 dctx->ctxdata.evp_md_ctx = evp_md_ctx;
163 switch (dctx->key->key_alg) {
168 md5ctx = isc_mem_get(dctx->mctx, sizeof(isc_md5_t));
170 return (ISC_R_NOMEMORY);
171 isc_md5_init(md5ctx);
172 dctx->ctxdata.md5ctx = md5ctx;
175 case DST_ALG_RSASHA1:
176 case DST_ALG_NSEC3RSASHA1:
180 sha1ctx = isc_mem_get(dctx->mctx, sizeof(isc_sha1_t));
182 return (ISC_R_NOMEMORY);
183 isc_sha1_init(sha1ctx);
184 dctx->ctxdata.sha1ctx = sha1ctx;
187 case DST_ALG_RSASHA256:
189 isc_sha256_t *sha256ctx;
191 sha256ctx = isc_mem_get(dctx->mctx,
192 sizeof(isc_sha256_t));
193 if (sha256ctx == NULL)
194 return (ISC_R_NOMEMORY);
195 isc_sha256_init(sha256ctx);
196 dctx->ctxdata.sha256ctx = sha256ctx;
199 case DST_ALG_RSASHA512:
201 isc_sha512_t *sha512ctx;
203 sha512ctx = isc_mem_get(dctx->mctx,
204 sizeof(isc_sha512_t));
205 if (sha512ctx == NULL)
206 return (ISC_R_NOMEMORY);
207 isc_sha512_init(sha512ctx);
208 dctx->ctxdata.sha512ctx = sha512ctx;
216 return (ISC_R_SUCCESS);
220 opensslrsa_destroyctx(dst_context_t *dctx) {
222 EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
225 REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
226 dctx->key->key_alg == DST_ALG_RSASHA1 ||
227 dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
228 dctx->key->key_alg == DST_ALG_RSASHA256 ||
229 dctx->key->key_alg == DST_ALG_RSASHA512);
232 if (evp_md_ctx != NULL) {
233 EVP_MD_CTX_destroy(evp_md_ctx);
234 dctx->ctxdata.evp_md_ctx = NULL;
237 switch (dctx->key->key_alg) {
240 isc_md5_t *md5ctx = dctx->ctxdata.md5ctx;
242 if (md5ctx != NULL) {
243 isc_md5_invalidate(md5ctx);
244 isc_mem_put(dctx->mctx, md5ctx,
246 dctx->ctxdata.md5ctx = NULL;
250 case DST_ALG_RSASHA1:
251 case DST_ALG_NSEC3RSASHA1:
253 isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
255 if (sha1ctx != NULL) {
256 isc_sha1_invalidate(sha1ctx);
257 isc_mem_put(dctx->mctx, sha1ctx,
259 dctx->ctxdata.sha1ctx = NULL;
263 case DST_ALG_RSASHA256:
265 isc_sha256_t *sha256ctx = dctx->ctxdata.sha256ctx;
267 if (sha256ctx != NULL) {
268 isc_sha256_invalidate(sha256ctx);
269 isc_mem_put(dctx->mctx, sha256ctx,
270 sizeof(isc_sha256_t));
271 dctx->ctxdata.sha256ctx = NULL;
275 case DST_ALG_RSASHA512:
277 isc_sha512_t *sha512ctx = dctx->ctxdata.sha512ctx;
279 if (sha512ctx != NULL) {
280 isc_sha512_invalidate(sha512ctx);
281 isc_mem_put(dctx->mctx, sha512ctx,
282 sizeof(isc_sha512_t));
283 dctx->ctxdata.sha512ctx = NULL;
294 opensslrsa_adddata(dst_context_t *dctx, const isc_region_t *data) {
296 EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
299 REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
300 dctx->key->key_alg == DST_ALG_RSASHA1 ||
301 dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
302 dctx->key->key_alg == DST_ALG_RSASHA256 ||
303 dctx->key->key_alg == DST_ALG_RSASHA512);
306 if (!EVP_DigestUpdate(evp_md_ctx, data->base, data->length)) {
307 return (ISC_R_FAILURE);
310 switch (dctx->key->key_alg) {
313 isc_md5_t *md5ctx = dctx->ctxdata.md5ctx;
315 isc_md5_update(md5ctx, data->base, data->length);
318 case DST_ALG_RSASHA1:
319 case DST_ALG_NSEC3RSASHA1:
321 isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
323 isc_sha1_update(sha1ctx, data->base, data->length);
326 case DST_ALG_RSASHA256:
328 isc_sha256_t *sha256ctx = dctx->ctxdata.sha256ctx;
330 isc_sha256_update(sha256ctx, data->base, data->length);
333 case DST_ALG_RSASHA512:
335 isc_sha512_t *sha512ctx = dctx->ctxdata.sha512ctx;
337 isc_sha512_update(sha512ctx, data->base, data->length);
344 return (ISC_R_SUCCESS);
347 #if ! USE_EVP && OPENSSL_VERSION_NUMBER < 0x00908000L
349 * Digest prefixes from RFC 5702.
351 static unsigned char sha256_prefix[] =
352 { 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48,
353 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20};
354 static unsigned char sha512_prefix[] =
355 { 0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48,
356 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40};
357 #define PREFIXLEN sizeof(sha512_prefix)
363 opensslrsa_sign(dst_context_t *dctx, isc_buffer_t *sig) {
364 dst_key_t *key = dctx->key;
366 unsigned int siglen = 0;
368 EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
369 EVP_PKEY *pkey = key->keydata.pkey;
371 RSA *rsa = key->keydata.rsa;
372 /* note: ISC_SHA512_DIGESTLENGTH >= ISC_*_DIGESTLENGTH */
373 unsigned char digest[PREFIXLEN + ISC_SHA512_DIGESTLENGTH];
376 unsigned int digestlen = 0;
381 #if OPENSSL_VERSION_NUMBER < 0x00908000L
382 unsigned int prefixlen = 0;
383 const unsigned char *prefix = NULL;
387 REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
388 dctx->key->key_alg == DST_ALG_RSASHA1 ||
389 dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
390 dctx->key->key_alg == DST_ALG_RSASHA256 ||
391 dctx->key->key_alg == DST_ALG_RSASHA512);
393 isc_buffer_availableregion(sig, &r);
396 if (r.length < (unsigned int) EVP_PKEY_size(pkey))
397 return (ISC_R_NOSPACE);
399 if (!EVP_SignFinal(evp_md_ctx, r.base, &siglen, pkey)) {
400 return (ISC_R_FAILURE);
403 if (r.length < (unsigned int) RSA_size(rsa))
404 return (ISC_R_NOSPACE);
406 switch (dctx->key->key_alg) {
409 isc_md5_t *md5ctx = dctx->ctxdata.md5ctx;
411 isc_md5_final(md5ctx, digest);
413 digestlen = ISC_MD5_DIGESTLENGTH;
416 case DST_ALG_RSASHA1:
417 case DST_ALG_NSEC3RSASHA1:
419 isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
421 isc_sha1_final(sha1ctx, digest);
423 digestlen = ISC_SHA1_DIGESTLENGTH;
426 case DST_ALG_RSASHA256:
428 isc_sha256_t *sha256ctx = dctx->ctxdata.sha256ctx;
430 isc_sha256_final(digest, sha256ctx);
431 digestlen = ISC_SHA256_DIGESTLENGTH;
432 #if OPENSSL_VERSION_NUMBER < 0x00908000L
433 prefix = sha256_prefix;
434 prefixlen = sizeof(sha256_prefix);
440 case DST_ALG_RSASHA512:
442 isc_sha512_t *sha512ctx = dctx->ctxdata.sha512ctx;
444 isc_sha512_final(digest, sha512ctx);
445 digestlen = ISC_SHA512_DIGESTLENGTH;
446 #if OPENSSL_VERSION_NUMBER < 0x00908000L
447 prefix = sha512_prefix;
448 prefixlen = sizeof(sha512_prefix);
458 #if OPENSSL_VERSION_NUMBER < 0x00908000L
459 switch (dctx->key->key_alg) {
461 case DST_ALG_RSASHA1:
462 case DST_ALG_NSEC3RSASHA1:
464 status = RSA_sign(type, digest, digestlen, r.base,
468 case DST_ALG_RSASHA256:
469 case DST_ALG_RSASHA512:
470 INSIST(prefix != NULL);
471 INSIST(prefixlen != 0);
472 INSIST(prefixlen + digestlen <= sizeof(digest));
474 memmove(digest + prefixlen, digest, digestlen);
475 memcpy(digest, prefix, prefixlen);
476 status = RSA_private_encrypt(digestlen + prefixlen,
490 status = RSA_sign(type, digest, digestlen, r.base, &siglen, rsa);
493 err = ERR_peek_error_line(&file, &line);
495 message = ERR_error_string(err, NULL);
497 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
501 isc_buffer_add(sig, siglen);
503 return (ISC_R_SUCCESS);
507 opensslrsa_verify(dst_context_t *dctx, const isc_region_t *sig) {
508 dst_key_t *key = dctx->key;
511 EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
512 EVP_PKEY *pkey = key->keydata.pkey;
514 /* note: ISC_SHA512_DIGESTLENGTH >= ISC_*_DIGESTLENGTH */
515 unsigned char digest[ISC_SHA512_DIGESTLENGTH];
517 unsigned int digestlen = 0;
518 RSA *rsa = key->keydata.rsa;
519 #if OPENSSL_VERSION_NUMBER < 0x00908000L
520 unsigned int prefixlen = 0;
521 const unsigned char *prefix = NULL;
525 REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
526 dctx->key->key_alg == DST_ALG_RSASHA1 ||
527 dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
528 dctx->key->key_alg == DST_ALG_RSASHA256 ||
529 dctx->key->key_alg == DST_ALG_RSASHA512);
532 status = EVP_VerifyFinal(evp_md_ctx, sig->base, sig->length, pkey);
534 switch (dctx->key->key_alg) {
537 isc_md5_t *md5ctx = dctx->ctxdata.md5ctx;
539 isc_md5_final(md5ctx, digest);
541 digestlen = ISC_MD5_DIGESTLENGTH;
544 case DST_ALG_RSASHA1:
545 case DST_ALG_NSEC3RSASHA1:
547 isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
549 isc_sha1_final(sha1ctx, digest);
551 digestlen = ISC_SHA1_DIGESTLENGTH;
554 case DST_ALG_RSASHA256:
556 isc_sha256_t *sha256ctx = dctx->ctxdata.sha256ctx;
558 isc_sha256_final(digest, sha256ctx);
559 digestlen = ISC_SHA256_DIGESTLENGTH;
560 #if OPENSSL_VERSION_NUMBER < 0x00908000L
561 prefix = sha256_prefix;
562 prefixlen = sizeof(sha256_prefix);
568 case DST_ALG_RSASHA512:
570 isc_sha512_t *sha512ctx = dctx->ctxdata.sha512ctx;
572 isc_sha512_final(digest, sha512ctx);
573 digestlen = ISC_SHA512_DIGESTLENGTH;
574 #if OPENSSL_VERSION_NUMBER < 0x00908000L
575 prefix = sha512_prefix;
576 prefixlen = sizeof(sha512_prefix);
586 if (sig->length != (unsigned int) RSA_size(rsa))
587 return (DST_R_VERIFYFAILURE);
589 #if OPENSSL_VERSION_NUMBER < 0x00908000L
590 switch (dctx->key->key_alg) {
592 case DST_ALG_RSASHA1:
593 case DST_ALG_NSEC3RSASHA1:
595 status = RSA_verify(type, digest, digestlen, sig->base,
599 case DST_ALG_RSASHA256:
600 case DST_ALG_RSASHA512:
603 * 1024 is big enough for all valid RSA bit sizes
604 * for use with DNSSEC.
606 unsigned char original[PREFIXLEN + 1024];
608 INSIST(prefix != NULL);
609 INSIST(prefixlen != 0U);
611 if (RSA_size(rsa) > (int)sizeof(original))
612 return (DST_R_VERIFYFAILURE);
614 status = RSA_public_decrypt(sig->length, sig->base,
618 return (DST_R_VERIFYFAILURE);
619 if (status != (int)(prefixlen + digestlen))
620 return (DST_R_VERIFYFAILURE);
621 if (memcmp(original, prefix, prefixlen))
622 return (DST_R_VERIFYFAILURE);
623 if (memcmp(original + prefixlen, digest, digestlen))
624 return (DST_R_VERIFYFAILURE);
634 status = RSA_verify(type, digest, digestlen, sig->base,
639 return (dst__openssl_toresult(DST_R_VERIFYFAILURE));
641 return (ISC_R_SUCCESS);
645 opensslrsa_compare(const dst_key_t *key1, const dst_key_t *key2) {
647 RSA *rsa1 = NULL, *rsa2 = NULL;
649 EVP_PKEY *pkey1, *pkey2;
653 pkey1 = key1->keydata.pkey;
654 pkey2 = key2->keydata.pkey;
656 * The pkey reference will keep these around after
657 * the RSA_free() call.
660 rsa1 = EVP_PKEY_get1_RSA(pkey1);
664 rsa2 = EVP_PKEY_get1_RSA(pkey2);
668 rsa1 = key1->keydata.rsa;
669 rsa2 = key2->keydata.rsa;
672 if (rsa1 == NULL && rsa2 == NULL)
674 else if (rsa1 == NULL || rsa2 == NULL)
677 status = BN_cmp(rsa1->n, rsa2->n) ||
678 BN_cmp(rsa1->e, rsa2->e);
684 if ((rsa1->flags & RSA_FLAG_EXT_PKEY) != 0 ||
685 (rsa2->flags & RSA_FLAG_EXT_PKEY) != 0) {
686 if ((rsa1->flags & RSA_FLAG_EXT_PKEY) == 0 ||
687 (rsa2->flags & RSA_FLAG_EXT_PKEY) == 0)
690 * Can't compare private parameters, BTW does it make sense?
696 if (rsa1->d != NULL || rsa2->d != NULL) {
697 if (rsa1->d == NULL || rsa2->d == NULL)
699 status = BN_cmp(rsa1->d, rsa2->d) ||
700 BN_cmp(rsa1->p, rsa2->p) ||
701 BN_cmp(rsa1->q, rsa2->q);
709 #if OPENSSL_VERSION_NUMBER > 0x00908000L
711 progress_cb(int p, int n, BN_GENCB *cb)
728 opensslrsa_generate(dst_key_t *key, int exp, void (*callback)(int)) {
729 #if OPENSSL_VERSION_NUMBER > 0x00908000L
735 RSA *rsa = RSA_new();
736 BIGNUM *e = BN_new();
738 EVP_PKEY *pkey = EVP_PKEY_new();
741 if (rsa == NULL || e == NULL)
746 if (!EVP_PKEY_set1_RSA(pkey, rsa))
760 if (callback == NULL) {
761 BN_GENCB_set_old(&cb, NULL, NULL);
764 BN_GENCB_set(&cb, &progress_cb, u.dptr);
767 if (RSA_generate_key_ex(rsa, key->key_size, e, &cb)) {
771 key->keydata.pkey = pkey;
775 key->keydata.rsa = rsa;
777 return (ISC_R_SUCCESS);
789 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
794 EVP_PKEY *pkey = EVP_PKEY_new();
799 return (ISC_R_NOMEMORY);
808 rsa = RSA_generate_key(key->key_size, e, NULL, NULL);
813 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
817 if (!EVP_PKEY_set1_RSA(pkey, rsa)) {
820 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
822 key->keydata.pkey = pkey;
825 key->keydata.rsa = rsa;
828 return (ISC_R_SUCCESS);
833 opensslrsa_isprivate(const dst_key_t *key) {
835 RSA *rsa = EVP_PKEY_get1_RSA(key->keydata.pkey);
838 /* key->keydata.pkey still has a reference so rsa is still valid. */
840 RSA *rsa = key->keydata.rsa;
842 if (rsa != NULL && (rsa->flags & RSA_FLAG_EXT_PKEY) != 0)
844 return (ISC_TF(rsa != NULL && rsa->d != NULL));
848 opensslrsa_destroy(dst_key_t *key) {
850 EVP_PKEY *pkey = key->keydata.pkey;
852 key->keydata.pkey = NULL;
854 RSA *rsa = key->keydata.rsa;
856 key->keydata.rsa = NULL;
862 opensslrsa_todns(const dst_key_t *key, isc_buffer_t *data) {
864 unsigned int e_bytes;
865 unsigned int mod_bytes;
873 REQUIRE(key->keydata.pkey != NULL);
875 REQUIRE(key->keydata.rsa != NULL);
879 pkey = key->keydata.pkey;
880 rsa = EVP_PKEY_get1_RSA(pkey);
882 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
884 rsa = key->keydata.rsa;
887 isc_buffer_availableregion(data, &r);
889 e_bytes = BN_num_bytes(rsa->e);
890 mod_bytes = BN_num_bytes(rsa->n);
892 if (e_bytes < 256) { /*%< key exponent is <= 2040 bits */
894 DST_RET(ISC_R_NOSPACE);
895 isc_buffer_putuint8(data, (isc_uint8_t) e_bytes);
896 isc_region_consume(&r, 1);
899 DST_RET(ISC_R_NOSPACE);
900 isc_buffer_putuint8(data, 0);
901 isc_buffer_putuint16(data, (isc_uint16_t) e_bytes);
902 isc_region_consume(&r, 3);
905 if (r.length < e_bytes + mod_bytes)
906 DST_RET(ISC_R_NOSPACE);
908 BN_bn2bin(rsa->e, r.base);
909 isc_region_consume(&r, e_bytes);
910 BN_bn2bin(rsa->n, r.base);
912 isc_buffer_add(data, e_bytes + mod_bytes);
924 opensslrsa_fromdns(dst_key_t *key, isc_buffer_t *data) {
927 unsigned int e_bytes;
932 isc_buffer_remainingregion(data, &r);
934 return (ISC_R_SUCCESS);
938 return (dst__openssl_toresult(ISC_R_NOMEMORY));
943 return (DST_R_INVALIDPUBLICKEY);
951 return (DST_R_INVALIDPUBLICKEY);
953 e_bytes = ((*r.base++) << 8);
954 e_bytes += *r.base++;
958 if (r.length < e_bytes) {
960 return (DST_R_INVALIDPUBLICKEY);
962 rsa->e = BN_bin2bn(r.base, e_bytes, NULL);
966 rsa->n = BN_bin2bn(r.base, r.length, NULL);
968 key->key_size = BN_num_bits(rsa->n);
970 isc_buffer_forward(data, r.length);
973 pkey = EVP_PKEY_new();
976 return (ISC_R_NOMEMORY);
978 if (!EVP_PKEY_set1_RSA(pkey, rsa)) {
981 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
983 key->keydata.pkey = pkey;
986 key->keydata.rsa = rsa;
989 return (ISC_R_SUCCESS);
993 opensslrsa_tofile(const dst_key_t *key, const char *directory) {
997 unsigned char *bufs[8];
1001 if (key->keydata.pkey == NULL)
1002 return (DST_R_NULLKEY);
1003 rsa = EVP_PKEY_get1_RSA(key->keydata.pkey);
1005 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
1007 if (key->keydata.rsa == NULL)
1008 return (DST_R_NULLKEY);
1009 rsa = key->keydata.rsa;
1012 for (i = 0; i < 8; i++) {
1013 bufs[i] = isc_mem_get(key->mctx, BN_num_bytes(rsa->n));
1014 if (bufs[i] == NULL) {
1015 result = ISC_R_NOMEMORY;
1022 priv.elements[i].tag = TAG_RSA_MODULUS;
1023 priv.elements[i].length = BN_num_bytes(rsa->n);
1024 BN_bn2bin(rsa->n, bufs[i]);
1025 priv.elements[i].data = bufs[i];
1028 priv.elements[i].tag = TAG_RSA_PUBLICEXPONENT;
1029 priv.elements[i].length = BN_num_bytes(rsa->e);
1030 BN_bn2bin(rsa->e, bufs[i]);
1031 priv.elements[i].data = bufs[i];
1034 if (rsa->d != NULL) {
1035 priv.elements[i].tag = TAG_RSA_PRIVATEEXPONENT;
1036 priv.elements[i].length = BN_num_bytes(rsa->d);
1037 BN_bn2bin(rsa->d, bufs[i]);
1038 priv.elements[i].data = bufs[i];
1042 if (rsa->p != NULL) {
1043 priv.elements[i].tag = TAG_RSA_PRIME1;
1044 priv.elements[i].length = BN_num_bytes(rsa->p);
1045 BN_bn2bin(rsa->p, bufs[i]);
1046 priv.elements[i].data = bufs[i];
1050 if (rsa->q != NULL) {
1051 priv.elements[i].tag = TAG_RSA_PRIME2;
1052 priv.elements[i].length = BN_num_bytes(rsa->q);
1053 BN_bn2bin(rsa->q, bufs[i]);
1054 priv.elements[i].data = bufs[i];
1058 if (rsa->dmp1 != NULL) {
1059 priv.elements[i].tag = TAG_RSA_EXPONENT1;
1060 priv.elements[i].length = BN_num_bytes(rsa->dmp1);
1061 BN_bn2bin(rsa->dmp1, bufs[i]);
1062 priv.elements[i].data = bufs[i];
1066 if (rsa->dmq1 != NULL) {
1067 priv.elements[i].tag = TAG_RSA_EXPONENT2;
1068 priv.elements[i].length = BN_num_bytes(rsa->dmq1);
1069 BN_bn2bin(rsa->dmq1, bufs[i]);
1070 priv.elements[i].data = bufs[i];
1074 if (rsa->iqmp != NULL) {
1075 priv.elements[i].tag = TAG_RSA_COEFFICIENT;
1076 priv.elements[i].length = BN_num_bytes(rsa->iqmp);
1077 BN_bn2bin(rsa->iqmp, bufs[i]);
1078 priv.elements[i].data = bufs[i];
1082 if (key->engine != NULL) {
1083 priv.elements[i].tag = TAG_RSA_ENGINE;
1084 priv.elements[i].length = strlen(key->engine) + 1;
1085 priv.elements[i].data = (unsigned char *)key->engine;
1089 if (key->label != NULL) {
1090 priv.elements[i].tag = TAG_RSA_LABEL;
1091 priv.elements[i].length = strlen(key->label) + 1;
1092 priv.elements[i].data = (unsigned char *)key->label;
1098 result = dst__privstruct_writefile(key, &priv, directory);
1103 for (i = 0; i < 8; i++) {
1104 if (bufs[i] == NULL)
1106 isc_mem_put(key->mctx, bufs[i], BN_num_bytes(rsa->n));
1112 rsa_check(RSA *rsa, RSA *pub)
1114 /* Public parameters should be the same but if they are not set
1115 * copy them from the public key. */
1117 if (rsa->n != NULL) {
1118 if (BN_cmp(rsa->n, pub->n) != 0)
1119 return (DST_R_INVALIDPRIVATEKEY);
1124 if (rsa->e != NULL) {
1125 if (BN_cmp(rsa->e, pub->e) != 0)
1126 return (DST_R_INVALIDPRIVATEKEY);
1132 if (rsa->n == NULL || rsa->e == NULL)
1133 return (DST_R_INVALIDPRIVATEKEY);
1134 return (ISC_R_SUCCESS);
1138 opensslrsa_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
1142 RSA *rsa = NULL, *pubrsa = NULL;
1146 isc_mem_t *mctx = key->mctx;
1147 const char *engine = NULL, *label = NULL;
1148 #if defined(USE_ENGINE) || USE_EVP
1149 EVP_PKEY *pkey = NULL;
1153 if (pub != NULL && pub->keydata.pkey != NULL)
1154 pubrsa = EVP_PKEY_get1_RSA(pub->keydata.pkey);
1156 if (pub != NULL && pub->keydata.rsa != NULL) {
1157 pubrsa = pub->keydata.rsa;
1158 pub->keydata.rsa = NULL;
1162 /* read private key file */
1163 ret = dst__privstruct_parse(key, DST_ALG_RSA, lexer, mctx, &priv);
1164 if (ret != ISC_R_SUCCESS)
1167 for (i = 0; i < priv.nelements; i++) {
1168 switch (priv.elements[i].tag) {
1169 case TAG_RSA_ENGINE:
1170 engine = (char *)priv.elements[i].data;
1173 label = (char *)priv.elements[i].data;
1180 * Is this key is stored in a HSM?
1181 * See if we can fetch it.
1183 if (label != NULL) {
1186 DST_RET(DST_R_NOENGINE);
1187 e = dst__openssl_getengine(engine);
1189 DST_RET(DST_R_NOENGINE);
1190 pkey = ENGINE_load_private_key(e, label, NULL, NULL);
1192 /* ERR_print_errors_fp(stderr); */
1193 DST_RET(ISC_R_NOTFOUND);
1195 key->engine = isc_mem_strdup(key->mctx, engine);
1196 if (key->engine == NULL)
1197 DST_RET(ISC_R_NOMEMORY);
1198 key->label = isc_mem_strdup(key->mctx, label);
1199 if (key->label == NULL)
1200 DST_RET(ISC_R_NOMEMORY);
1201 rsa = EVP_PKEY_get1_RSA(pkey);
1203 DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE));
1204 if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS)
1205 DST_RET(DST_R_INVALIDPRIVATEKEY);
1208 key->key_size = EVP_PKEY_bits(pkey);
1210 key->keydata.pkey = pkey;
1213 key->keydata.rsa = rsa;
1214 EVP_PKEY_free(pkey);
1216 dst__privstruct_free(&priv, mctx);
1217 memset(&priv, 0, sizeof(priv));
1218 return (ISC_R_SUCCESS);
1220 DST_RET(DST_R_NOENGINE);
1226 DST_RET(ISC_R_NOMEMORY);
1230 pkey = EVP_PKEY_new();
1232 DST_RET(ISC_R_NOMEMORY);
1233 if (!EVP_PKEY_set1_RSA(pkey, rsa))
1234 DST_RET(ISC_R_FAILURE);
1235 key->keydata.pkey = pkey;
1237 key->keydata.rsa = rsa;
1240 for (i = 0; i < priv.nelements; i++) {
1242 switch (priv.elements[i].tag) {
1243 case TAG_RSA_ENGINE:
1250 bn = BN_bin2bn(priv.elements[i].data,
1251 priv.elements[i].length, NULL);
1253 DST_RET(ISC_R_NOMEMORY);
1256 switch (priv.elements[i].tag) {
1257 case TAG_RSA_MODULUS:
1260 case TAG_RSA_PUBLICEXPONENT:
1263 case TAG_RSA_PRIVATEEXPONENT:
1266 case TAG_RSA_PRIME1:
1269 case TAG_RSA_PRIME2:
1272 case TAG_RSA_EXPONENT1:
1275 case TAG_RSA_EXPONENT2:
1278 case TAG_RSA_COEFFICIENT:
1283 dst__privstruct_free(&priv, mctx);
1284 memset(&priv, 0, sizeof(priv));
1286 if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS)
1287 DST_RET(DST_R_INVALIDPRIVATEKEY);
1288 key->key_size = BN_num_bits(rsa->n);
1295 return (ISC_R_SUCCESS);
1300 EVP_PKEY_free(pkey);
1306 opensslrsa_destroy(key);
1307 dst__privstruct_free(&priv, mctx);
1308 memset(&priv, 0, sizeof(priv));
1313 opensslrsa_fromlabel(dst_key_t *key, const char *engine, const char *label,
1319 EVP_PKEY *pkey = NULL;
1320 RSA *rsa = NULL, *pubrsa = NULL;
1326 DST_RET(DST_R_NOENGINE);
1327 e = dst__openssl_getengine(engine);
1329 DST_RET(DST_R_NOENGINE);
1330 pkey = ENGINE_load_public_key(e, label, NULL, NULL);
1332 pubrsa = EVP_PKEY_get1_RSA(pkey);
1333 EVP_PKEY_free(pkey);
1335 DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE));
1337 pkey = ENGINE_load_private_key(e, label, NULL, NULL);
1339 DST_RET(ISC_R_NOTFOUND);
1340 if (engine != NULL) {
1341 key->engine = isc_mem_strdup(key->mctx, engine);
1342 if (key->engine == NULL)
1343 DST_RET(ISC_R_NOMEMORY);
1345 key->engine = isc_mem_strdup(key->mctx, label);
1346 if (key->engine == NULL)
1347 DST_RET(ISC_R_NOMEMORY);
1348 colon = strchr(key->engine, ':');
1352 key->label = isc_mem_strdup(key->mctx, label);
1353 if (key->label == NULL)
1354 DST_RET(ISC_R_NOMEMORY);
1355 rsa = EVP_PKEY_get1_RSA(pkey);
1357 DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE));
1358 if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS)
1359 DST_RET(DST_R_INVALIDPRIVATEKEY);
1362 key->key_size = EVP_PKEY_bits(pkey);
1364 key->keydata.pkey = pkey;
1367 key->keydata.rsa = rsa;
1368 EVP_PKEY_free(pkey);
1370 return (ISC_R_SUCCESS);
1378 EVP_PKEY_free(pkey);
1385 return(DST_R_NOENGINE);
1389 static dst_func_t opensslrsa_functions = {
1390 opensslrsa_createctx,
1391 opensslrsa_destroyctx,
1395 NULL, /*%< computesecret */
1397 NULL, /*%< paramcompare */
1398 opensslrsa_generate,
1399 opensslrsa_isprivate,
1405 NULL, /*%< cleanup */
1406 opensslrsa_fromlabel,
1408 NULL, /*%< restore */
1412 dst__opensslrsa_init(dst_func_t **funcp, unsigned char algorithm) {
1413 REQUIRE(funcp != NULL);
1415 if (*funcp == NULL) {
1416 switch (algorithm) {
1417 case DST_ALG_RSASHA256:
1418 #if defined(HAVE_EVP_SHA256) || !USE_EVP
1419 *funcp = &opensslrsa_functions;
1422 case DST_ALG_RSASHA512:
1423 #if defined(HAVE_EVP_SHA512) || !USE_EVP
1424 *funcp = &opensslrsa_functions;
1428 *funcp = &opensslrsa_functions;
1432 return (ISC_R_SUCCESS);
1437 #include <isc/util.h>
1439 EMPTY_TRANSLATION_UNIT
1441 #endif /* OPENSSL */