contrib/bind/lib/dns/opensslrsa_link.c

   1 /*
   2  * Copyright (C) 2004-2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2000-2003  Internet Software Consortium.
   4  *
   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.
   8  *
   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.
  16  */
  17
  18 /*
  19  * Principal Author: Brian Wellington
  20  * $Id: opensslrsa_link.c,v 1.16.128.3 2009/01/19 00:01:10 marka Exp $
  21  */
  22 #ifdef OPENSSL
  23
  24 #include <config.h>
  25
  26 #include <isc/entropy.h>
  27 #include <isc/md5.h>
  28 #include <isc/sha1.h>
  29 #include <isc/mem.h>
  30 #include <isc/string.h>
  31 #include <isc/util.h>
  32
  33 #include <dst/result.h>
  34
  35 #include "dst_internal.h"
  36 #include "dst_openssl.h"
  37 #include "dst_parse.h"
  38
  39 #include <openssl/err.h>
  40 #include <openssl/objects.h>
  41 #include <openssl/rsa.h>
  42 #if OPENSSL_VERSION_NUMBER > 0x00908000L
  43 #include <openssl/bn.h>
  44 #endif
  45
  46 /*
  47  * We don't use configure for windows so enforce the OpenSSL version
  48  * here.  Unlike with configure we don't support overriding this test.
  49  */
  50 #ifdef WIN32
  51 #if !((OPENSSL_VERSION_NUMBER >= 0x009070cfL && \
  52        OPENSSL_VERSION_NUMBER < 0x00908000L) || \
  53       OPENSSL_VERSION_NUMBER >= 0x0090804fL)
  54 #error Please upgrade OpenSSL to 0.9.8d/0.9.7l or greater.
  55 #endif
  56 #endif
  57
  58
  59         /*
  60          * XXXMPA  Temporarily disable RSA_BLINDING as it requires
  61          * good quality random data that cannot currently be guaranteed.
  62          * XXXMPA  Find which versions of openssl use pseudo random data
  63          * and set RSA_FLAG_BLINDING for those.
  64          */
  65
  66 #if 0
  67 #if OPENSSL_VERSION_NUMBER < 0x0090601fL
  68 #define SET_FLAGS(rsa) \
  69         do { \
  70         (rsa)->flags &= ~(RSA_FLAG_CACHE_PUBLIC | RSA_FLAG_CACHE_PRIVATE); \
  71         (rsa)->flags |= RSA_FLAG_BLINDING; \
  72         } while (0)
  73 #else
  74 #define SET_FLAGS(rsa) \
  75         do { \
  76                 (rsa)->flags |= RSA_FLAG_BLINDING; \
  77         } while (0)
  78 #endif
  79 #endif
  80
  81 #if OPENSSL_VERSION_NUMBER < 0x0090601fL
  82 #define SET_FLAGS(rsa) \
  83         do { \
  84         (rsa)->flags &= ~(RSA_FLAG_CACHE_PUBLIC | RSA_FLAG_CACHE_PRIVATE); \
  85         (rsa)->flags &= ~RSA_FLAG_BLINDING; \
  86         } while (0)
  87 #elif defined(RSA_FLAG_NO_BLINDING)
  88 #define SET_FLAGS(rsa) \
  89         do { \
  90                 (rsa)->flags &= ~RSA_FLAG_BLINDING; \
  91                 (rsa)->flags |= RSA_FLAG_NO_BLINDING; \
  92         } while (0)
  93 #else
  94 #define SET_FLAGS(rsa) \
  95         do { \
  96                 (rsa)->flags &= ~RSA_FLAG_BLINDING; \
  97         } while (0)
  98 #endif
  99
 100 static isc_result_t opensslrsa_todns(const dst_key_t *key, isc_buffer_t *data);
 101
 102 static isc_result_t
 103 opensslrsa_createctx(dst_key_t *key, dst_context_t *dctx) {
 104         UNUSED(key);
 105         REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
 106                 dctx->key->key_alg == DST_ALG_RSASHA1);
 107
 108         if (dctx->key->key_alg == DST_ALG_RSAMD5) {
 109                 isc_md5_t *md5ctx;
 110
 111                 md5ctx = isc_mem_get(dctx->mctx, sizeof(isc_md5_t));
 112                 if (md5ctx == NULL)
 113                         return (ISC_R_NOMEMORY);
 114                 isc_md5_init(md5ctx);
 115                 dctx->ctxdata.md5ctx = md5ctx;
 116         } else {
 117                 isc_sha1_t *sha1ctx;
 118
 119                 sha1ctx = isc_mem_get(dctx->mctx, sizeof(isc_sha1_t));
 120                 if (sha1ctx == NULL)
 121                         return (ISC_R_NOMEMORY);
 122                 isc_sha1_init(sha1ctx);
 123                 dctx->ctxdata.sha1ctx = sha1ctx;
 124         }
 125
 126         return (ISC_R_SUCCESS);
 127 }
 128
 129 static void
 130 opensslrsa_destroyctx(dst_context_t *dctx) {
 131         REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
 132                 dctx->key->key_alg == DST_ALG_RSASHA1);
 133
 134         if (dctx->key->key_alg == DST_ALG_RSAMD5) {
 135                 isc_md5_t *md5ctx = dctx->ctxdata.md5ctx;
 136
 137                 if (md5ctx != NULL) {
 138                         isc_md5_invalidate(md5ctx);
 139                         isc_mem_put(dctx->mctx, md5ctx, sizeof(isc_md5_t));
 140                         dctx->ctxdata.md5ctx = NULL;
 141                 }
 142         } else {
 143                 isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
 144
 145                 if (sha1ctx != NULL) {
 146                         isc_sha1_invalidate(sha1ctx);
 147                         isc_mem_put(dctx->mctx, sha1ctx, sizeof(isc_sha1_t));
 148                         dctx->ctxdata.sha1ctx = NULL;
 149                 }
 150         }
 151 }
 152
 153 static isc_result_t
 154 opensslrsa_adddata(dst_context_t *dctx, const isc_region_t *data) {
 155         REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
 156                 dctx->key->key_alg == DST_ALG_RSASHA1);
 157
 158         if (dctx->key->key_alg == DST_ALG_RSAMD5) {
 159                 isc_md5_t *md5ctx = dctx->ctxdata.md5ctx;
 160                 isc_md5_update(md5ctx, data->base, data->length);
 161         } else {
 162                 isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
 163                 isc_sha1_update(sha1ctx, data->base, data->length);
 164         }
 165         return (ISC_R_SUCCESS);
 166 }
 167
 168 static isc_result_t
 169 opensslrsa_sign(dst_context_t *dctx, isc_buffer_t *sig) {
 170         dst_key_t *key = dctx->key;
 171         RSA *rsa = key->keydata.rsa;
 172         isc_region_t r;
 173         /* note: ISC_SHA1_DIGESTLENGTH > ISC_MD5_DIGESTLENGTH */
 174         unsigned char digest[ISC_SHA1_DIGESTLENGTH];
 175         unsigned int siglen = 0;
 176         int status;
 177         int type;
 178         unsigned int digestlen;
 179         char *message;
 180         unsigned long err;
 181         const char* file;
 182         int line;
 183
 184         REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
 185                 dctx->key->key_alg == DST_ALG_RSASHA1);
 186
 187         isc_buffer_availableregion(sig, &r);
 188
 189         if (r.length < (unsigned int) RSA_size(rsa))
 190                 return (ISC_R_NOSPACE);
 191
 192         if (dctx->key->key_alg == DST_ALG_RSAMD5) {
 193                 isc_md5_t *md5ctx = dctx->ctxdata.md5ctx;
 194                 isc_md5_final(md5ctx, digest);
 195                 type = NID_md5;
 196                 digestlen = ISC_MD5_DIGESTLENGTH;
 197         } else {
 198                 isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
 199                 isc_sha1_final(sha1ctx, digest);
 200                 type = NID_sha1;
 201                 digestlen = ISC_SHA1_DIGESTLENGTH;
 202         }
 203
 204         status = RSA_sign(type, digest, digestlen, r.base, &siglen, rsa);
 205         if (status == 0) {
 206                 err = ERR_peek_error_line(&file, &line);
 207                 if (err != 0U) {
 208                         message = ERR_error_string(err, NULL);
 209                         fprintf(stderr, "%s:%s:%d\n", message,
 210                                 file ? file : "", line);
 211                 }
 212                 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
 213         }
 214
 215         isc_buffer_add(sig, siglen);
 216
 217         return (ISC_R_SUCCESS);
 218 }
 219
 220 static isc_result_t
 221 opensslrsa_verify(dst_context_t *dctx, const isc_region_t *sig) {
 222         dst_key_t *key = dctx->key;
 223         RSA *rsa = key->keydata.rsa;
 224         /* note: ISC_SHA1_DIGESTLENGTH > ISC_MD5_DIGESTLENGTH */
 225         unsigned char digest[ISC_SHA1_DIGESTLENGTH];
 226         int status = 0;
 227         int type;
 228         unsigned int digestlen;
 229
 230         REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
 231                 dctx->key->key_alg == DST_ALG_RSASHA1);
 232
 233         if (dctx->key->key_alg == DST_ALG_RSAMD5) {
 234                 isc_md5_t *md5ctx = dctx->ctxdata.md5ctx;
 235                 isc_md5_final(md5ctx, digest);
 236                 type = NID_md5;
 237                 digestlen = ISC_MD5_DIGESTLENGTH;
 238         } else {
 239                 isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
 240                 isc_sha1_final(sha1ctx, digest);
 241                 type = NID_sha1;
 242                 digestlen = ISC_SHA1_DIGESTLENGTH;
 243         }
 244
 245         if (sig->length < (unsigned int) RSA_size(rsa))
 246                 return (DST_R_VERIFYFAILURE);
 247
 248         status = RSA_verify(type, digest, digestlen, sig->base,
 249                             RSA_size(rsa), rsa);
 250         if (status != 1)
 251                 return (dst__openssl_toresult(DST_R_VERIFYFAILURE));
 252
 253         return (ISC_R_SUCCESS);
 254 }
 255
 256 static isc_boolean_t
 257 opensslrsa_compare(const dst_key_t *key1, const dst_key_t *key2) {
 258         int status;
 259         RSA *rsa1, *rsa2;
 260
 261         rsa1 = key1->keydata.rsa;
 262         rsa2 = key2->keydata.rsa;
 263
 264         if (rsa1 == NULL && rsa2 == NULL)
 265                 return (ISC_TRUE);
 266         else if (rsa1 == NULL || rsa2 == NULL)
 267                 return (ISC_FALSE);
 268
 269         status = BN_cmp(rsa1->n, rsa2->n) ||
 270                  BN_cmp(rsa1->e, rsa2->e);
 271
 272         if (status != 0)
 273                 return (ISC_FALSE);
 274
 275         if (rsa1->d != NULL || rsa2->d != NULL) {
 276                 if (rsa1->d == NULL || rsa2->d == NULL)
 277                         return (ISC_FALSE);
 278                 status = BN_cmp(rsa1->d, rsa2->d) ||
 279                          BN_cmp(rsa1->p, rsa2->p) ||
 280                          BN_cmp(rsa1->q, rsa2->q);
 281
 282                 if (status != 0)
 283                         return (ISC_FALSE);
 284         }
 285         return (ISC_TRUE);
 286 }
 287
 288 static isc_result_t
 289 opensslrsa_generate(dst_key_t *key, int exp) {
 290 #if OPENSSL_VERSION_NUMBER > 0x00908000L
 291         BN_GENCB cb;
 292         RSA *rsa = RSA_new();
 293         BIGNUM *e = BN_new();
 294
 295         if (rsa == NULL || e == NULL)
 296                 goto err;
 297
 298         if (exp == 0) {
 299                 /* RSA_F4 0x10001 */
 300                 BN_set_bit(e, 0);
 301                 BN_set_bit(e, 16);
 302         } else {
 303                 /* F5 0x100000001 */
 304                 BN_set_bit(e, 0);
 305                 BN_set_bit(e, 32);
 306         }
 307
 308         BN_GENCB_set_old(&cb, NULL, NULL);
 309
 310         if (RSA_generate_key_ex(rsa, key->key_size, e, &cb)) {
 311                 BN_free(e);
 312                 SET_FLAGS(rsa);
 313                 key->keydata.rsa = rsa;
 314                 return (ISC_R_SUCCESS);
 315         }
 316
 317 err:
 318         if (e != NULL)
 319                 BN_free(e);
 320         if (rsa != NULL)
 321                 RSA_free(rsa);
 322         return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
 323 #else
 324         RSA *rsa;
 325         unsigned long e;
 326
 327         if (exp == 0)
 328                e = RSA_F4;
 329         else
 330                e = 0x40000003;
 331         rsa = RSA_generate_key(key->key_size, e, NULL, NULL);
 332         if (rsa == NULL)
 333                return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
 334         SET_FLAGS(rsa);
 335         key->keydata.rsa = rsa;
 336
 337         return (ISC_R_SUCCESS);
 338 #endif
 339 }
 340
 341 static isc_boolean_t
 342 opensslrsa_isprivate(const dst_key_t *key) {
 343         RSA *rsa = (RSA *) key->keydata.rsa;
 344         return (ISC_TF(rsa != NULL && rsa->d != NULL));
 345 }
 346
 347 static void
 348 opensslrsa_destroy(dst_key_t *key) {
 349         RSA *rsa = key->keydata.rsa;
 350         RSA_free(rsa);
 351         key->keydata.rsa = NULL;
 352 }
 353
 354
 355 static isc_result_t
 356 opensslrsa_todns(const dst_key_t *key, isc_buffer_t *data) {
 357         RSA *rsa;
 358         isc_region_t r;
 359         unsigned int e_bytes;
 360         unsigned int mod_bytes;
 361
 362         REQUIRE(key->keydata.rsa != NULL);
 363
 364         rsa = key->keydata.rsa;
 365
 366         isc_buffer_availableregion(data, &r);
 367
 368         e_bytes = BN_num_bytes(rsa->e);
 369         mod_bytes = BN_num_bytes(rsa->n);
 370
 371         if (e_bytes < 256) {    /*%< key exponent is <= 2040 bits */
 372                 if (r.length < 1)
 373                         return (ISC_R_NOSPACE);
 374                 isc_buffer_putuint8(data, (isc_uint8_t) e_bytes);
 375         } else {
 376                 if (r.length < 3)
 377                         return (ISC_R_NOSPACE);
 378                 isc_buffer_putuint8(data, 0);
 379                 isc_buffer_putuint16(data, (isc_uint16_t) e_bytes);
 380         }
 381
 382         if (r.length < e_bytes + mod_bytes)
 383                 return (ISC_R_NOSPACE);
 384         isc_buffer_availableregion(data, &r);
 385
 386         BN_bn2bin(rsa->e, r.base);
 387         r.base += e_bytes;
 388         BN_bn2bin(rsa->n, r.base);
 389
 390         isc_buffer_add(data, e_bytes + mod_bytes);
 391
 392         return (ISC_R_SUCCESS);
 393 }
 394
 395 static isc_result_t
 396 opensslrsa_fromdns(dst_key_t *key, isc_buffer_t *data) {
 397         RSA *rsa;
 398         isc_region_t r;
 399         unsigned int e_bytes;
 400
 401         isc_buffer_remainingregion(data, &r);
 402         if (r.length == 0)
 403                 return (ISC_R_SUCCESS);
 404
 405         rsa = RSA_new();
 406         if (rsa == NULL)
 407                 return (dst__openssl_toresult(ISC_R_NOMEMORY));
 408         SET_FLAGS(rsa);
 409
 410         if (r.length < 1) {
 411                 RSA_free(rsa);
 412                 return (DST_R_INVALIDPUBLICKEY);
 413         }
 414         e_bytes = *r.base++;
 415         r.length--;
 416
 417         if (e_bytes == 0) {
 418                 if (r.length < 2) {
 419                         RSA_free(rsa);
 420                         return (DST_R_INVALIDPUBLICKEY);
 421                 }
 422                 e_bytes = ((*r.base++) << 8);
 423                 e_bytes += *r.base++;
 424                 r.length -= 2;
 425         }
 426
 427         if (r.length < e_bytes) {
 428                 RSA_free(rsa);
 429                 return (DST_R_INVALIDPUBLICKEY);
 430         }
 431         rsa->e = BN_bin2bn(r.base, e_bytes, NULL);
 432         r.base += e_bytes;
 433         r.length -= e_bytes;
 434
 435         rsa->n = BN_bin2bn(r.base, r.length, NULL);
 436
 437         key->key_size = BN_num_bits(rsa->n);
 438
 439         isc_buffer_forward(data, r.length);
 440
 441         key->keydata.rsa = rsa;
 442
 443         return (ISC_R_SUCCESS);
 444 }
 445
 446
 447 static isc_result_t
 448 opensslrsa_tofile(const dst_key_t *key, const char *directory) {
 449         int i;
 450         RSA *rsa;
 451         dst_private_t priv;
 452         unsigned char *bufs[8];
 453         isc_result_t result;
 454
 455         if (key->keydata.rsa == NULL)
 456                 return (DST_R_NULLKEY);
 457
 458         rsa = key->keydata.rsa;
 459
 460         for (i = 0; i < 8; i++) {
 461                 bufs[i] = isc_mem_get(key->mctx, BN_num_bytes(rsa->n));
 462                 if (bufs[i] == NULL) {
 463                         result = ISC_R_NOMEMORY;
 464                         goto fail;
 465                 }
 466         }
 467
 468         i = 0;
 469
 470         priv.elements[i].tag = TAG_RSA_MODULUS;
 471         priv.elements[i].length = BN_num_bytes(rsa->n);
 472         BN_bn2bin(rsa->n, bufs[i]);
 473         priv.elements[i].data = bufs[i];
 474         i++;
 475
 476         priv.elements[i].tag = TAG_RSA_PUBLICEXPONENT;
 477         priv.elements[i].length = BN_num_bytes(rsa->e);
 478         BN_bn2bin(rsa->e, bufs[i]);
 479         priv.elements[i].data = bufs[i];
 480         i++;
 481
 482         priv.elements[i].tag = TAG_RSA_PRIVATEEXPONENT;
 483         priv.elements[i].length = BN_num_bytes(rsa->d);
 484         BN_bn2bin(rsa->d, bufs[i]);
 485         priv.elements[i].data = bufs[i];
 486         i++;
 487
 488         priv.elements[i].tag = TAG_RSA_PRIME1;
 489         priv.elements[i].length = BN_num_bytes(rsa->p);
 490         BN_bn2bin(rsa->p, bufs[i]);
 491         priv.elements[i].data = bufs[i];
 492         i++;
 493
 494         priv.elements[i].tag = TAG_RSA_PRIME2;
 495         priv.elements[i].length = BN_num_bytes(rsa->q);
 496         BN_bn2bin(rsa->q, bufs[i]);
 497         priv.elements[i].data = bufs[i];
 498         i++;
 499
 500         priv.elements[i].tag = TAG_RSA_EXPONENT1;
 501         priv.elements[i].length = BN_num_bytes(rsa->dmp1);
 502         BN_bn2bin(rsa->dmp1, bufs[i]);
 503         priv.elements[i].data = bufs[i];
 504         i++;
 505
 506         priv.elements[i].tag = TAG_RSA_EXPONENT2;
 507         priv.elements[i].length = BN_num_bytes(rsa->dmq1);
 508         BN_bn2bin(rsa->dmq1, bufs[i]);
 509         priv.elements[i].data = bufs[i];
 510         i++;
 511
 512         priv.elements[i].tag = TAG_RSA_COEFFICIENT;
 513         priv.elements[i].length = BN_num_bytes(rsa->iqmp);
 514         BN_bn2bin(rsa->iqmp, bufs[i]);
 515         priv.elements[i].data = bufs[i];
 516         i++;
 517
 518         priv.nelements = i;
 519         result =  dst__privstruct_writefile(key, &priv, directory);
 520  fail:
 521         for (i = 0; i < 8; i++) {
 522                 if (bufs[i] == NULL)
 523                         break;
 524                 isc_mem_put(key->mctx, bufs[i], BN_num_bytes(rsa->n));
 525         }
 526         return (result);
 527 }
 528
 529 static isc_result_t
 530 opensslrsa_parse(dst_key_t *key, isc_lex_t *lexer) {
 531         dst_private_t priv;
 532         isc_result_t ret;
 533         int i;
 534         RSA *rsa = NULL;
 535         isc_mem_t *mctx = key->mctx;
 536 #define DST_RET(a) {ret = a; goto err;}
 537
 538         /* read private key file */
 539         ret = dst__privstruct_parse(key, DST_ALG_RSA, lexer, mctx, &priv);
 540         if (ret != ISC_R_SUCCESS)
 541                 return (ret);
 542
 543         rsa = RSA_new();
 544         if (rsa == NULL)
 545                 DST_RET(ISC_R_NOMEMORY);
 546         SET_FLAGS(rsa);
 547         key->keydata.rsa = rsa;
 548
 549         for (i = 0; i < priv.nelements; i++) {
 550                 BIGNUM *bn;
 551                 bn = BN_bin2bn(priv.elements[i].data,
 552                                priv.elements[i].length, NULL);
 553                 if (bn == NULL)
 554                         DST_RET(ISC_R_NOMEMORY);
 555
 556                 switch (priv.elements[i].tag) {
 557                         case TAG_RSA_MODULUS:
 558                                 rsa->n = bn;
 559                                 break;
 560                         case TAG_RSA_PUBLICEXPONENT:
 561                                 rsa->e = bn;
 562                                 break;
 563                         case TAG_RSA_PRIVATEEXPONENT:
 564                                 rsa->d = bn;
 565                                 break;
 566                         case TAG_RSA_PRIME1:
 567                                 rsa->p = bn;
 568                                 break;
 569                         case TAG_RSA_PRIME2:
 570                                 rsa->q = bn;
 571                                 break;
 572                         case TAG_RSA_EXPONENT1:
 573                                 rsa->dmp1 = bn;
 574                                 break;
 575                         case TAG_RSA_EXPONENT2:
 576                                 rsa->dmq1 = bn;
 577                                 break;
 578                         case TAG_RSA_COEFFICIENT:
 579                                 rsa->iqmp = bn;
 580                                 break;
 581                 }
 582         }
 583         dst__privstruct_free(&priv, mctx);
 584
 585         key->key_size = BN_num_bits(rsa->n);
 586
 587         return (ISC_R_SUCCESS);
 588
 589  err:
 590         opensslrsa_destroy(key);
 591         dst__privstruct_free(&priv, mctx);
 592         memset(&priv, 0, sizeof(priv));
 593         return (ret);
 594 }
 595
 596 static dst_func_t opensslrsa_functions = {
 597         opensslrsa_createctx,
 598         opensslrsa_destroyctx,
 599         opensslrsa_adddata,
 600         opensslrsa_sign,
 601         opensslrsa_verify,
 602         NULL, /*%< computesecret */
 603         opensslrsa_compare,
 604         NULL, /*%< paramcompare */
 605         opensslrsa_generate,
 606         opensslrsa_isprivate,
 607         opensslrsa_destroy,
 608         opensslrsa_todns,
 609         opensslrsa_fromdns,
 610         opensslrsa_tofile,
 611         opensslrsa_parse,
 612         NULL, /*%< cleanup */
 613 };
 614
 615 isc_result_t
 616 dst__opensslrsa_init(dst_func_t **funcp) {
 617         REQUIRE(funcp != NULL);
 618         if (*funcp == NULL)
 619                 *funcp = &opensslrsa_functions;
 620         return (ISC_R_SUCCESS);
 621 }
 622
 623 #else /* OPENSSL */
 624
 625 #include <isc/util.h>
 626
 627 EMPTY_TRANSLATION_UNIT
 628
 629 #endif /* OPENSSL */
 630 /*! \file */