contrib/bind9/lib/dns/openssldsa_link.c

   1 /*
   2  * Portions Copyright (C) 2004-2009, 2011  Internet Systems Consortium, Inc. ("ISC")
   3  * Portions Copyright (C) 1999-2002  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 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.
  16  *
  17  * Portions Copyright (C) 1995-2000 by Network Associates, Inc.
  18  *
  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.
  22  *
  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.
  30  */
  31
  32 /* $Id: openssldsa_link.c,v 1.13.120.4 2011-03-12 04:57:27 tbox Exp $ */
  33
  34 #ifdef OPENSSL
  35 #ifndef USE_EVP
  36 #define USE_EVP 1
  37 #endif
  38
  39 #include <config.h>
  40
  41 #include <string.h>
  42
  43 #include <isc/entropy.h>
  44 #include <isc/mem.h>
  45 #include <isc/sha1.h>
  46 #include <isc/util.h>
  47
  48 #include <dst/result.h>
  49
  50 #include "dst_internal.h"
  51 #include "dst_openssl.h"
  52 #include "dst_parse.h"
  53
  54 #include <openssl/dsa.h>
  55
  56 static isc_result_t openssldsa_todns(const dst_key_t *key, isc_buffer_t *data);
  57
  58 static isc_result_t
  59 openssldsa_createctx(dst_key_t *key, dst_context_t *dctx) {
  60 #if USE_EVP
  61         EVP_MD_CTX *evp_md_ctx;
  62
  63         UNUSED(key);
  64
  65         evp_md_ctx = EVP_MD_CTX_create();
  66         if (evp_md_ctx == NULL)
  67                 return (ISC_R_NOMEMORY);
  68
  69         if (!EVP_DigestInit_ex(evp_md_ctx, EVP_dss1(), NULL)) {
  70                 EVP_MD_CTX_destroy(evp_md_ctx);
  71                         return (ISC_R_FAILURE);
  72         }
  73
  74         dctx->ctxdata.evp_md_ctx = evp_md_ctx;
  75
  76         return (ISC_R_SUCCESS);
  77 #else
  78         isc_sha1_t *sha1ctx;
  79
  80         UNUSED(key);
  81
  82         sha1ctx = isc_mem_get(dctx->mctx, sizeof(isc_sha1_t));
  83         isc_sha1_init(sha1ctx);
  84         dctx->ctxdata.sha1ctx = sha1ctx;
  85         return (ISC_R_SUCCESS);
  86 #endif
  87 }
  88
  89 static void
  90 openssldsa_destroyctx(dst_context_t *dctx) {
  91 #if USE_EVP
  92         EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
  93
  94         if (evp_md_ctx != NULL) {
  95                 EVP_MD_CTX_destroy(evp_md_ctx);
  96                 dctx->ctxdata.evp_md_ctx = NULL;
  97         }
  98 #else
  99         isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
 100
 101         if (sha1ctx != NULL) {
 102                 isc_sha1_invalidate(sha1ctx);
 103                 isc_mem_put(dctx->mctx, sha1ctx, sizeof(isc_sha1_t));
 104                 dctx->ctxdata.sha1ctx = NULL;
 105         }
 106 #endif
 107 }
 108
 109 static isc_result_t
 110 openssldsa_adddata(dst_context_t *dctx, const isc_region_t *data) {
 111 #if USE_EVP
 112         EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
 113
 114         if (!EVP_DigestUpdate(evp_md_ctx, data->base, data->length)) {
 115                 return (ISC_R_FAILURE);
 116         }
 117 #else
 118         isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
 119
 120         isc_sha1_update(sha1ctx, data->base, data->length);
 121 #endif
 122         return (ISC_R_SUCCESS);
 123 }
 124
 125 static int
 126 BN_bn2bin_fixed(BIGNUM *bn, unsigned char *buf, int size) {
 127         int bytes = size - BN_num_bytes(bn);
 128         while (bytes-- > 0)
 129                 *buf++ = 0;
 130         BN_bn2bin(bn, buf);
 131         return (size);
 132 }
 133
 134 static isc_result_t
 135 openssldsa_sign(dst_context_t *dctx, isc_buffer_t *sig) {
 136         dst_key_t *key = dctx->key;
 137         DSA *dsa = key->keydata.dsa;
 138         isc_region_t r;
 139         DSA_SIG *dsasig;
 140 #if USE_EVP
 141         EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
 142         EVP_PKEY *pkey;
 143         unsigned char *sigbuf;
 144         const unsigned char *sb;
 145         unsigned int siglen;
 146 #else
 147         isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
 148         unsigned char digest[ISC_SHA1_DIGESTLENGTH];
 149 #endif
 150
 151         isc_buffer_availableregion(sig, &r);
 152         if (r.length < ISC_SHA1_DIGESTLENGTH * 2 + 1)
 153                 return (ISC_R_NOSPACE);
 154
 155 #if USE_EVP
 156         pkey = EVP_PKEY_new();
 157         if (pkey == NULL)
 158                 return (ISC_R_NOMEMORY);
 159         if (!EVP_PKEY_set1_DSA(pkey, dsa)) {
 160                 EVP_PKEY_free(pkey);
 161                 return (ISC_R_FAILURE);
 162         }
 163         sigbuf = malloc(EVP_PKEY_size(pkey));
 164         if (sigbuf == NULL) {
 165                 EVP_PKEY_free(pkey);
 166                 return (ISC_R_NOMEMORY);
 167         }
 168         if (!EVP_SignFinal(evp_md_ctx, sigbuf, &siglen, pkey)) {
 169                 EVP_PKEY_free(pkey);
 170                 free(sigbuf);
 171                 return (ISC_R_FAILURE);
 172         }
 173         INSIST(EVP_PKEY_size(pkey) >= (int) siglen);
 174         EVP_PKEY_free(pkey);
 175         /* Convert from Dss-Sig-Value (RFC2459). */
 176         dsasig = DSA_SIG_new();
 177         if (dsasig == NULL) {
 178                 free(sigbuf);
 179                 return (ISC_R_NOMEMORY);
 180         }
 181         sb = sigbuf;
 182         if (d2i_DSA_SIG(&dsasig, &sb, (long) siglen) == NULL) {
 183                 free(sigbuf);
 184                 return (ISC_R_FAILURE);
 185         }
 186         free(sigbuf);
 187 #elif 0
 188         /* Only use EVP for the Digest */
 189         if (!EVP_DigestFinal_ex(evp_md_ctx, digest, &siglen)) {
 190                 return (ISC_R_FAILURE);
 191         }
 192         dsasig = DSA_do_sign(digest, ISC_SHA1_DIGESTLENGTH, dsa);
 193         if (dsasig == NULL)
 194                 return (dst__openssl_toresult(DST_R_SIGNFAILURE));
 195 #else
 196         isc_sha1_final(sha1ctx, digest);
 197
 198         dsasig = DSA_do_sign(digest, ISC_SHA1_DIGESTLENGTH, dsa);
 199         if (dsasig == NULL)
 200                 return (dst__openssl_toresult(DST_R_SIGNFAILURE));
 201 #endif
 202         *r.base++ = (key->key_size - 512)/64;
 203         BN_bn2bin_fixed(dsasig->r, r.base, ISC_SHA1_DIGESTLENGTH);
 204         r.base += ISC_SHA1_DIGESTLENGTH;
 205         BN_bn2bin_fixed(dsasig->s, r.base, ISC_SHA1_DIGESTLENGTH);
 206         r.base += ISC_SHA1_DIGESTLENGTH;
 207         DSA_SIG_free(dsasig);
 208         isc_buffer_add(sig, ISC_SHA1_DIGESTLENGTH * 2 + 1);
 209
 210         return (ISC_R_SUCCESS);
 211 }
 212
 213 static isc_result_t
 214 openssldsa_verify(dst_context_t *dctx, const isc_region_t *sig) {
 215         dst_key_t *key = dctx->key;
 216         DSA *dsa = key->keydata.dsa;
 217         int status = 0;
 218         unsigned char *cp = sig->base;
 219         DSA_SIG *dsasig;
 220 #if USE_EVP
 221         EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
 222 #if 0
 223         EVP_PKEY *pkey;
 224         unsigned char *sigbuf;
 225 #endif
 226         unsigned int siglen;
 227 #else
 228         isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
 229 #endif
 230         unsigned char digest[ISC_SHA1_DIGESTLENGTH];
 231
 232
 233 #if USE_EVP
 234 #if 1
 235         /* Only use EVP for the digest */
 236         if (!EVP_DigestFinal_ex(evp_md_ctx, digest, &siglen)) {
 237                 return (ISC_R_FAILURE);
 238         }
 239 #endif
 240 #else
 241         isc_sha1_final(sha1ctx, digest);
 242 #endif
 243
 244         if (sig->length != 2 * ISC_SHA1_DIGESTLENGTH + 1) {
 245                 return (DST_R_VERIFYFAILURE);
 246         }
 247
 248         cp++;   /*%< Skip T */
 249         dsasig = DSA_SIG_new();
 250         if (dsasig == NULL)
 251                 return (ISC_R_NOMEMORY);
 252         dsasig->r = BN_bin2bn(cp, ISC_SHA1_DIGESTLENGTH, NULL);
 253         cp += ISC_SHA1_DIGESTLENGTH;
 254         dsasig->s = BN_bin2bn(cp, ISC_SHA1_DIGESTLENGTH, NULL);
 255
 256 #if 0
 257         pkey = EVP_PKEY_new();
 258         if (pkey == NULL)
 259                 return (ISC_R_NOMEMORY);
 260         if (!EVP_PKEY_set1_DSA(pkey, dsa)) {
 261                 EVP_PKEY_free(pkey);
 262                 return (ISC_R_FAILURE);
 263         }
 264         /* Convert to Dss-Sig-Value (RFC2459). */
 265         sigbuf = malloc(EVP_PKEY_size(pkey) + 50);
 266         if (sigbuf == NULL) {
 267                 EVP_PKEY_free(pkey);
 268                 return (ISC_R_NOMEMORY);
 269         }
 270         siglen = (unsigned) i2d_DSA_SIG(dsasig, &sigbuf);
 271         INSIST(EVP_PKEY_size(pkey) >= (int) siglen);
 272         status = EVP_VerifyFinal(evp_md_ctx, sigbuf, siglen, pkey);
 273         EVP_PKEY_free(pkey);
 274         free(sigbuf);
 275 #else
 276         status = DSA_do_verify(digest, ISC_SHA1_DIGESTLENGTH, dsasig, dsa);
 277 #endif
 278         DSA_SIG_free(dsasig);
 279         if (status != 1)
 280                 return (dst__openssl_toresult(DST_R_VERIFYFAILURE));
 281
 282         return (ISC_R_SUCCESS);
 283 }
 284
 285 static isc_boolean_t
 286 openssldsa_compare(const dst_key_t *key1, const dst_key_t *key2) {
 287         int status;
 288         DSA *dsa1, *dsa2;
 289
 290         dsa1 = key1->keydata.dsa;
 291         dsa2 = key2->keydata.dsa;
 292
 293         if (dsa1 == NULL && dsa2 == NULL)
 294                 return (ISC_TRUE);
 295         else if (dsa1 == NULL || dsa2 == NULL)
 296                 return (ISC_FALSE);
 297
 298         status = BN_cmp(dsa1->p, dsa2->p) ||
 299                  BN_cmp(dsa1->q, dsa2->q) ||
 300                  BN_cmp(dsa1->g, dsa2->g) ||
 301                  BN_cmp(dsa1->pub_key, dsa2->pub_key);
 302
 303         if (status != 0)
 304                 return (ISC_FALSE);
 305
 306         if (dsa1->priv_key != NULL || dsa2->priv_key != NULL) {
 307                 if (dsa1->priv_key == NULL || dsa2->priv_key == NULL)
 308                         return (ISC_FALSE);
 309                 if (BN_cmp(dsa1->priv_key, dsa2->priv_key))
 310                         return (ISC_FALSE);
 311         }
 312         return (ISC_TRUE);
 313 }
 314
 315 static isc_result_t
 316 openssldsa_generate(dst_key_t *key, int unused) {
 317 #if OPENSSL_VERSION_NUMBER > 0x00908000L
 318         BN_GENCB cb;
 319 #endif
 320         DSA *dsa;
 321         unsigned char rand_array[ISC_SHA1_DIGESTLENGTH];
 322         isc_result_t result;
 323
 324         UNUSED(unused);
 325
 326         result = dst__entropy_getdata(rand_array, sizeof(rand_array),
 327                                       ISC_FALSE);
 328         if (result != ISC_R_SUCCESS)
 329                 return (result);
 330
 331 #if OPENSSL_VERSION_NUMBER > 0x00908000L
 332         dsa = DSA_new();
 333         if (dsa == NULL)
 334                 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
 335
 336         BN_GENCB_set_old(&cb, NULL, NULL);
 337
 338         if (!DSA_generate_parameters_ex(dsa, key->key_size, rand_array,
 339                                         ISC_SHA1_DIGESTLENGTH,  NULL, NULL,
 340                                         &cb))
 341         {
 342                 DSA_free(dsa);
 343                 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
 344         }
 345 #else
 346         dsa = DSA_generate_parameters(key->key_size, rand_array,
 347                                       ISC_SHA1_DIGESTLENGTH, NULL, NULL,
 348                                       NULL, NULL);
 349         if (dsa == NULL)
 350                 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
 351 #endif
 352
 353         if (DSA_generate_key(dsa) == 0) {
 354                 DSA_free(dsa);
 355                 return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
 356         }
 357         dsa->flags &= ~DSA_FLAG_CACHE_MONT_P;
 358
 359         key->keydata.dsa = dsa;
 360
 361         return (ISC_R_SUCCESS);
 362 }
 363
 364 static isc_boolean_t
 365 openssldsa_isprivate(const dst_key_t *key) {
 366         DSA *dsa = key->keydata.dsa;
 367         return (ISC_TF(dsa != NULL && dsa->priv_key != NULL));
 368 }
 369
 370 static void
 371 openssldsa_destroy(dst_key_t *key) {
 372         DSA *dsa = key->keydata.dsa;
 373         DSA_free(dsa);
 374         key->keydata.dsa = NULL;
 375 }
 376
 377
 378 static isc_result_t
 379 openssldsa_todns(const dst_key_t *key, isc_buffer_t *data) {
 380         DSA *dsa;
 381         isc_region_t r;
 382         int dnslen;
 383         unsigned int t, p_bytes;
 384
 385         REQUIRE(key->keydata.dsa != NULL);
 386
 387         dsa = key->keydata.dsa;
 388
 389         isc_buffer_availableregion(data, &r);
 390
 391         t = (BN_num_bytes(dsa->p) - 64) / 8;
 392         if (t > 8)
 393                 return (DST_R_INVALIDPUBLICKEY);
 394         p_bytes = 64 + 8 * t;
 395
 396         dnslen = 1 + (key->key_size * 3)/8 + ISC_SHA1_DIGESTLENGTH;
 397         if (r.length < (unsigned int) dnslen)
 398                 return (ISC_R_NOSPACE);
 399
 400         *r.base++ = t;
 401         BN_bn2bin_fixed(dsa->q, r.base, ISC_SHA1_DIGESTLENGTH);
 402         r.base += ISC_SHA1_DIGESTLENGTH;
 403         BN_bn2bin_fixed(dsa->p, r.base, key->key_size/8);
 404         r.base += p_bytes;
 405         BN_bn2bin_fixed(dsa->g, r.base, key->key_size/8);
 406         r.base += p_bytes;
 407         BN_bn2bin_fixed(dsa->pub_key, r.base, key->key_size/8);
 408         r.base += p_bytes;
 409
 410         isc_buffer_add(data, dnslen);
 411
 412         return (ISC_R_SUCCESS);
 413 }
 414
 415 static isc_result_t
 416 openssldsa_fromdns(dst_key_t *key, isc_buffer_t *data) {
 417         DSA *dsa;
 418         isc_region_t r;
 419         unsigned int t, p_bytes;
 420         isc_mem_t *mctx = key->mctx;
 421
 422         UNUSED(mctx);
 423
 424         isc_buffer_remainingregion(data, &r);
 425         if (r.length == 0)
 426                 return (ISC_R_SUCCESS);
 427
 428         dsa = DSA_new();
 429         if (dsa == NULL)
 430                 return (ISC_R_NOMEMORY);
 431         dsa->flags &= ~DSA_FLAG_CACHE_MONT_P;
 432
 433         t = (unsigned int) *r.base++;
 434         if (t > 8) {
 435                 DSA_free(dsa);
 436                 return (DST_R_INVALIDPUBLICKEY);
 437         }
 438         p_bytes = 64 + 8 * t;
 439
 440         if (r.length < 1 + ISC_SHA1_DIGESTLENGTH + 3 * p_bytes) {
 441                 DSA_free(dsa);
 442                 return (DST_R_INVALIDPUBLICKEY);
 443         }
 444
 445         dsa->q = BN_bin2bn(r.base, ISC_SHA1_DIGESTLENGTH, NULL);
 446         r.base += ISC_SHA1_DIGESTLENGTH;
 447
 448         dsa->p = BN_bin2bn(r.base, p_bytes, NULL);
 449         r.base += p_bytes;
 450
 451         dsa->g = BN_bin2bn(r.base, p_bytes, NULL);
 452         r.base += p_bytes;
 453
 454         dsa->pub_key = BN_bin2bn(r.base, p_bytes, NULL);
 455         r.base += p_bytes;
 456
 457         key->key_size = p_bytes * 8;
 458
 459         isc_buffer_forward(data, 1 + ISC_SHA1_DIGESTLENGTH + 3 * p_bytes);
 460
 461         key->keydata.dsa = dsa;
 462
 463         return (ISC_R_SUCCESS);
 464 }
 465
 466
 467 static isc_result_t
 468 openssldsa_tofile(const dst_key_t *key, const char *directory) {
 469         int cnt = 0;
 470         DSA *dsa;
 471         dst_private_t priv;
 472         unsigned char bufs[5][128];
 473
 474         if (key->keydata.dsa == NULL)
 475                 return (DST_R_NULLKEY);
 476
 477         dsa = key->keydata.dsa;
 478
 479         priv.elements[cnt].tag = TAG_DSA_PRIME;
 480         priv.elements[cnt].length = BN_num_bytes(dsa->p);
 481         BN_bn2bin(dsa->p, bufs[cnt]);
 482         priv.elements[cnt].data = bufs[cnt];
 483         cnt++;
 484
 485         priv.elements[cnt].tag = TAG_DSA_SUBPRIME;
 486         priv.elements[cnt].length = BN_num_bytes(dsa->q);
 487         BN_bn2bin(dsa->q, bufs[cnt]);
 488         priv.elements[cnt].data = bufs[cnt];
 489         cnt++;
 490
 491         priv.elements[cnt].tag = TAG_DSA_BASE;
 492         priv.elements[cnt].length = BN_num_bytes(dsa->g);
 493         BN_bn2bin(dsa->g, bufs[cnt]);
 494         priv.elements[cnt].data = bufs[cnt];
 495         cnt++;
 496
 497         priv.elements[cnt].tag = TAG_DSA_PRIVATE;
 498         priv.elements[cnt].length = BN_num_bytes(dsa->priv_key);
 499         BN_bn2bin(dsa->priv_key, bufs[cnt]);
 500         priv.elements[cnt].data = bufs[cnt];
 501         cnt++;
 502
 503         priv.elements[cnt].tag = TAG_DSA_PUBLIC;
 504         priv.elements[cnt].length = BN_num_bytes(dsa->pub_key);
 505         BN_bn2bin(dsa->pub_key, bufs[cnt]);
 506         priv.elements[cnt].data = bufs[cnt];
 507         cnt++;
 508
 509         priv.nelements = cnt;
 510         return (dst__privstruct_writefile(key, &priv, directory));
 511 }
 512
 513 static isc_result_t
 514 openssldsa_parse(dst_key_t *key, isc_lex_t *lexer) {
 515         dst_private_t priv;
 516         isc_result_t ret;
 517         int i;
 518         DSA *dsa = NULL;
 519         isc_mem_t *mctx = key->mctx;
 520 #define DST_RET(a) {ret = a; goto err;}
 521
 522         /* read private key file */
 523         ret = dst__privstruct_parse(key, DST_ALG_DSA, lexer, mctx, &priv);
 524         if (ret != ISC_R_SUCCESS)
 525                 return (ret);
 526
 527         dsa = DSA_new();
 528         if (dsa == NULL)
 529                 DST_RET(ISC_R_NOMEMORY);
 530         dsa->flags &= ~DSA_FLAG_CACHE_MONT_P;
 531         key->keydata.dsa = dsa;
 532
 533         for (i=0; i < priv.nelements; i++) {
 534                 BIGNUM *bn;
 535                 bn = BN_bin2bn(priv.elements[i].data,
 536                                priv.elements[i].length, NULL);
 537                 if (bn == NULL)
 538                         DST_RET(ISC_R_NOMEMORY);
 539
 540                 switch (priv.elements[i].tag) {
 541                         case TAG_DSA_PRIME:
 542                                 dsa->p = bn;
 543                                 break;
 544                         case TAG_DSA_SUBPRIME:
 545                                 dsa->q = bn;
 546                                 break;
 547                         case TAG_DSA_BASE:
 548                                 dsa->g = bn;
 549                                 break;
 550                         case TAG_DSA_PRIVATE:
 551                                 dsa->priv_key = bn;
 552                                 break;
 553                         case TAG_DSA_PUBLIC:
 554                                 dsa->pub_key = bn;
 555                                 break;
 556                 }
 557         }
 558         dst__privstruct_free(&priv, mctx);
 559
 560         key->key_size = BN_num_bits(dsa->p);
 561
 562         return (ISC_R_SUCCESS);
 563
 564  err:
 565         openssldsa_destroy(key);
 566         dst__privstruct_free(&priv, mctx);
 567         memset(&priv, 0, sizeof(priv));
 568         return (ret);
 569 }
 570
 571 static dst_func_t openssldsa_functions = {
 572         openssldsa_createctx,
 573         openssldsa_destroyctx,
 574         openssldsa_adddata,
 575         openssldsa_sign,
 576         openssldsa_verify,
 577         NULL, /*%< computesecret */
 578         openssldsa_compare,
 579         NULL, /*%< paramcompare */
 580         openssldsa_generate,
 581         openssldsa_isprivate,
 582         openssldsa_destroy,
 583         openssldsa_todns,
 584         openssldsa_fromdns,
 585         openssldsa_tofile,
 586         openssldsa_parse,
 587         NULL, /*%< cleanup */
 588         NULL, /*%< fromlabel */
 589 };
 590
 591 isc_result_t
 592 dst__openssldsa_init(dst_func_t **funcp) {
 593         REQUIRE(funcp != NULL);
 594         if (*funcp == NULL)
 595                 *funcp = &openssldsa_functions;
 596         return (ISC_R_SUCCESS);
 597 }
 598
 599 #else /* OPENSSL */
 600
 601 #include <isc/util.h>
 602
 603 EMPTY_TRANSLATION_UNIT
 604
 605 #endif /* OPENSSL */
 606 /*! \file */