lib/libcrypto/dsa/dsa_ameth.c

   1 /* $OpenBSD: dsa_ameth.c,v 1.26 2018/08/24 20:22:15 tb Exp $ */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 2006.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60
  61 #include <openssl/opensslconf.h>
  62
  63 #include <openssl/asn1.h>
  64 #include <openssl/bn.h>
  65 #include <openssl/dsa.h>
  66 #include <openssl/err.h>
  67 #include <openssl/x509.h>
  68
  69 #include "asn1_locl.h"
  70 #include "bn_lcl.h"
  71
  72 static int
  73 dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
  74 {
  75         const unsigned char *p, *pm;
  76         int pklen, pmlen;
  77         int ptype;
  78         const void *pval;
  79         const ASN1_STRING *pstr;
  80         X509_ALGOR *palg;
  81         ASN1_INTEGER *public_key = NULL;
  82
  83         DSA *dsa = NULL;
  84
  85         if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
  86                 return 0;
  87         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
  88
  89         if (ptype == V_ASN1_SEQUENCE) {
  90                 pstr = pval;
  91                 pm = pstr->data;
  92                 pmlen = pstr->length;
  93
  94                 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen))) {
  95                         DSAerror(DSA_R_DECODE_ERROR);
  96                         goto err;
  97                 }
  98         } else if (ptype == V_ASN1_NULL || ptype == V_ASN1_UNDEF) {
  99                 if (!(dsa = DSA_new())) {
 100                         DSAerror(ERR_R_MALLOC_FAILURE);
 101                         goto err;
 102                         }
 103         } else {
 104                 DSAerror(DSA_R_PARAMETER_ENCODING_ERROR);
 105                 goto err;
 106         }
 107
 108         if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen))) {
 109                 DSAerror(DSA_R_DECODE_ERROR);
 110                 goto err;
 111         }
 112
 113         if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) {
 114                 DSAerror(DSA_R_BN_DECODE_ERROR);
 115                 goto err;
 116         }
 117
 118         ASN1_INTEGER_free(public_key);
 119         EVP_PKEY_assign_DSA(pkey, dsa);
 120         return 1;
 121
 122 err:
 123         if (public_key)
 124                 ASN1_INTEGER_free(public_key);
 125         DSA_free(dsa);
 126         return 0;
 127 }
 128
 129 static int
 130 dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
 131 {
 132         DSA *dsa;
 133         void *pval = NULL;
 134         int ptype;
 135         unsigned char *penc = NULL;
 136         int penclen;
 137
 138         dsa = pkey->pkey.dsa;
 139         if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
 140                 ASN1_STRING *str;
 141
 142                 str = ASN1_STRING_new();
 143                 if (str == NULL) {
 144                         DSAerror(ERR_R_MALLOC_FAILURE);
 145                         goto err;
 146                 }
 147                 str->length = i2d_DSAparams(dsa, &str->data);
 148                 if (str->length <= 0) {
 149                         DSAerror(ERR_R_MALLOC_FAILURE);
 150                         ASN1_STRING_free(str);
 151                         goto err;
 152                 }
 153                 pval = str;
 154                 ptype = V_ASN1_SEQUENCE;
 155         } else
 156                 ptype = V_ASN1_UNDEF;
 157
 158         dsa->write_params = 0;
 159
 160         penclen = i2d_DSAPublicKey(dsa, &penc);
 161
 162         if (penclen <= 0) {
 163                 DSAerror(ERR_R_MALLOC_FAILURE);
 164                 goto err;
 165         }
 166
 167         if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA), ptype, pval,
 168             penc, penclen))
 169                 return 1;
 170
 171 err:
 172         free(penc);
 173         ASN1_STRING_free(pval);
 174
 175         return 0;
 176 }
 177
 178 /* In PKCS#8 DSA: you just get a private key integer and parameters in the
 179  * AlgorithmIdentifier the pubkey must be recalculated.
 180  */
 181 static int
 182 dsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
 183 {
 184         const unsigned char *p, *pm;
 185         int pklen, pmlen;
 186         int ptype;
 187         const void *pval;
 188         const ASN1_STRING *pstr;
 189         const X509_ALGOR *palg;
 190         ASN1_INTEGER *privkey = NULL;
 191         BN_CTX *ctx = NULL;
 192         DSA *dsa = NULL;
 193
 194         int ret = 0;
 195
 196         if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
 197                 return 0;
 198         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 199         if (ptype != V_ASN1_SEQUENCE)
 200                 goto decerr;
 201
 202         if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
 203                 goto decerr;
 204         if (privkey->type == V_ASN1_NEG_INTEGER)
 205                 goto decerr;
 206
 207         pstr = pval;
 208         pm = pstr->data;
 209         pmlen = pstr->length;
 210         if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
 211                 goto decerr;
 212         /* We have parameters now set private key */
 213         if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) {
 214                 DSAerror(DSA_R_BN_ERROR);
 215                 goto dsaerr;
 216         }
 217         /* Calculate public key */
 218         if (!(dsa->pub_key = BN_new())) {
 219                 DSAerror(ERR_R_MALLOC_FAILURE);
 220                 goto dsaerr;
 221         }
 222         if (!(ctx = BN_CTX_new())) {
 223                 DSAerror(ERR_R_MALLOC_FAILURE);
 224                 goto dsaerr;
 225         }
 226
 227         if (!BN_mod_exp_ct(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
 228                 DSAerror(DSA_R_BN_ERROR);
 229                 goto dsaerr;
 230         }
 231
 232         if (!EVP_PKEY_assign_DSA(pkey, dsa))
 233                 goto decerr;
 234
 235         ret = 1;
 236         goto done;
 237
 238 decerr:
 239         DSAerror(DSA_R_DECODE_ERROR);
 240 dsaerr:
 241         DSA_free(dsa);
 242 done:
 243         BN_CTX_free(ctx);
 244         ASN1_INTEGER_free(privkey);
 245         return ret;
 246 }
 247
 248 static int
 249 dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 250 {
 251         ASN1_STRING *params = NULL;
 252         ASN1_INTEGER *prkey = NULL;
 253         unsigned char *dp = NULL;
 254         int dplen;
 255
 256         params = ASN1_STRING_new();
 257         if (!params) {
 258                 DSAerror(ERR_R_MALLOC_FAILURE);
 259                 goto err;
 260         }
 261
 262         params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
 263         if (params->length <= 0) {
 264                 DSAerror(ERR_R_MALLOC_FAILURE);
 265                 goto err;
 266         }
 267         params->type = V_ASN1_SEQUENCE;
 268
 269         /* Get private key into integer */
 270         prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
 271         if (!prkey) {
 272                 DSAerror(DSA_R_BN_ERROR);
 273                 goto err;
 274         }
 275
 276         dplen = i2d_ASN1_INTEGER(prkey, &dp);
 277
 278         ASN1_INTEGER_free(prkey);
 279         prkey = NULL;
 280
 281         if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0, V_ASN1_SEQUENCE,
 282             params, dp, dplen))
 283                 goto err;
 284
 285         return 1;
 286
 287 err:
 288         free(dp);
 289         ASN1_STRING_free(params);
 290         ASN1_INTEGER_free(prkey);
 291         return 0;
 292 }
 293
 294 static int
 295 int_dsa_size(const EVP_PKEY *pkey)
 296 {
 297         return DSA_size(pkey->pkey.dsa);
 298 }
 299
 300 static int
 301 dsa_bits(const EVP_PKEY *pkey)
 302 {
 303         return BN_num_bits(pkey->pkey.dsa->p);
 304 }
 305
 306 static int
 307 dsa_missing_parameters(const EVP_PKEY *pkey)
 308 {
 309         DSA *dsa;
 310
 311         dsa = pkey->pkey.dsa;
 312         if (dsa->p == NULL || dsa->q == NULL || dsa->g == NULL)
 313                 return 1;
 314         return 0;
 315 }
 316
 317 static int
 318 dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 319 {
 320         BIGNUM *a;
 321
 322         if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
 323                 return 0;
 324         BN_free(to->pkey.dsa->p);
 325         to->pkey.dsa->p = a;
 326
 327         if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
 328                 return 0;
 329         BN_free(to->pkey.dsa->q);
 330         to->pkey.dsa->q = a;
 331
 332         if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
 333                 return 0;
 334         BN_free(to->pkey.dsa->g);
 335         to->pkey.dsa->g = a;
 336         return 1;
 337 }
 338
 339 static int
 340 dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 341 {
 342         if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
 343             BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
 344             BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
 345                 return 0;
 346         else
 347                 return 1;
 348 }
 349
 350 static int
 351 dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 352 {
 353         if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
 354                 return 0;
 355         else
 356                 return 1;
 357 }
 358
 359 static void
 360 int_dsa_free(EVP_PKEY *pkey)
 361 {
 362         DSA_free(pkey->pkey.dsa);
 363 }
 364
 365 static void
 366 update_buflen(const BIGNUM *b, size_t *pbuflen)
 367 {
 368         size_t i;
 369
 370         if (!b)
 371                 return;
 372         if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
 373                 *pbuflen = i;
 374 }
 375
 376 static int
 377 do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
 378 {
 379         unsigned char *m = NULL;
 380         int ret = 0;
 381         size_t buf_len = 0;
 382         const char *ktype = NULL;
 383         const BIGNUM *priv_key, *pub_key;
 384
 385         if (ptype == 2)
 386                 priv_key = x->priv_key;
 387         else
 388                 priv_key = NULL;
 389
 390         if (ptype > 0)
 391                 pub_key = x->pub_key;
 392         else
 393                 pub_key = NULL;
 394
 395         if (ptype == 2)
 396                 ktype = "Private-Key";
 397         else if (ptype == 1)
 398                 ktype = "Public-Key";
 399         else
 400                 ktype = "DSA-Parameters";
 401
 402         update_buflen(x->p, &buf_len);
 403         update_buflen(x->q, &buf_len);
 404         update_buflen(x->g, &buf_len);
 405         update_buflen(priv_key, &buf_len);
 406         update_buflen(pub_key, &buf_len);
 407
 408         m = malloc(buf_len + 10);
 409         if (m == NULL) {
 410                 DSAerror(ERR_R_MALLOC_FAILURE);
 411                 goto err;
 412         }
 413
 414         if (priv_key) {
 415                 if (!BIO_indent(bp, off, 128))
 416                         goto err;
 417                 if (BIO_printf(bp, "%s: (%d bit)\n", ktype,
 418                     BN_num_bits(x->p)) <= 0)
 419                         goto err;
 420         }
 421
 422         if (!ASN1_bn_print(bp, "priv:", priv_key, m, off))
 423                 goto err;
 424         if (!ASN1_bn_print(bp, "pub: ", pub_key, m, off))
 425                 goto err;
 426         if (!ASN1_bn_print(bp, "P:   ", x->p, m, off))
 427                 goto err;
 428         if (!ASN1_bn_print(bp, "Q:   ", x->q, m, off))
 429                 goto err;
 430         if (!ASN1_bn_print(bp, "G:   ", x->g, m, off))
 431                 goto err;
 432         ret = 1;
 433 err:
 434         free(m);
 435         return(ret);
 436 }
 437
 438 static int
 439 dsa_param_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen)
 440 {
 441         DSA *dsa;
 442
 443         if (!(dsa = d2i_DSAparams(NULL, pder, derlen))) {
 444                 DSAerror(ERR_R_DSA_LIB);
 445                 return 0;
 446         }
 447         EVP_PKEY_assign_DSA(pkey, dsa);
 448         return 1;
 449 }
 450
 451 static int
 452 dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 453 {
 454         return i2d_DSAparams(pkey->pkey.dsa, pder);
 455 }
 456
 457 static int
 458 dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx)
 459 {
 460         return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
 461 }
 462
 463 static int
 464 dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx)
 465 {
 466         return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
 467 }
 468
 469 static int
 470 dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx)
 471 {
 472         return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
 473 }
 474
 475 static int
 476 old_dsa_priv_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen)
 477 {
 478         DSA *dsa;
 479         BN_CTX *ctx = NULL;
 480         BIGNUM *j, *p1, *newp1;
 481
 482         if (!(dsa = d2i_DSAPrivateKey(NULL, pder, derlen))) {
 483                 DSAerror(ERR_R_DSA_LIB);
 484                 return 0;
 485         }
 486
 487         ctx = BN_CTX_new();
 488         if (ctx == NULL)
 489                 goto err;
 490
 491         /*
 492          * Check that p and q are consistent with each other.
 493          */
 494
 495         j = BN_CTX_get(ctx);
 496         p1 = BN_CTX_get(ctx);
 497         newp1 = BN_CTX_get(ctx);
 498         if (j == NULL || p1 == NULL || newp1 == NULL)
 499                 goto err;
 500         /* p1 = p - 1 */
 501         if (BN_sub(p1, dsa->p, BN_value_one()) == 0)
 502                 goto err;
 503         /* j = (p - 1) / q */
 504         if (BN_div_ct(j, NULL, p1, dsa->q, ctx) == 0)
 505                 goto err;
 506         /* q * j should == p - 1 */
 507         if (BN_mul(newp1, dsa->q, j, ctx) == 0)
 508                 goto err;
 509         if (BN_cmp(newp1, p1) != 0) {
 510                 DSAerror(DSA_R_BAD_Q_VALUE);
 511                 goto err;
 512         }
 513
 514         /*
 515          * Check that q is not a composite number.
 516          */
 517
 518         if (BN_is_prime_ex(dsa->q, BN_prime_checks, ctx, NULL) == 0) {
 519                 DSAerror(DSA_R_BAD_Q_VALUE);
 520                 goto err;
 521         }
 522
 523         BN_CTX_free(ctx);
 524
 525         EVP_PKEY_assign_DSA(pkey, dsa);
 526         return 1;
 527
 528 err:
 529         BN_CTX_free(ctx);
 530         DSA_free(dsa);
 531         return 0;
 532 }
 533
 534 static int
 535 old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 536 {
 537         return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
 538 }
 539
 540 static int
 541 dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, const ASN1_STRING *sig,
 542     int indent, ASN1_PCTX *pctx)
 543 {
 544         DSA_SIG *dsa_sig;
 545         const unsigned char *p;
 546
 547         if (!sig) {
 548                 if (BIO_puts(bp, "\n") <= 0)
 549                         return 0;
 550                 else
 551                         return 1;
 552         }
 553         p = sig->data;
 554         dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
 555         if (dsa_sig) {
 556                 int rv = 0;
 557                 size_t buf_len = 0;
 558                 unsigned char *m = NULL;
 559
 560                 update_buflen(dsa_sig->r, &buf_len);
 561                 update_buflen(dsa_sig->s, &buf_len);
 562                 m = malloc(buf_len + 10);
 563                 if (m == NULL) {
 564                         DSAerror(ERR_R_MALLOC_FAILURE);
 565                         goto err;
 566                 }
 567
 568                 if (BIO_write(bp, "\n", 1) != 1)
 569                         goto err;
 570
 571                 if (!ASN1_bn_print(bp, "r:   ", dsa_sig->r, m, indent))
 572                         goto err;
 573                 if (!ASN1_bn_print(bp, "s:   ", dsa_sig->s, m, indent))
 574                         goto err;
 575                 rv = 1;
 576 err:
 577                 free(m);
 578                 DSA_SIG_free(dsa_sig);
 579                 return rv;
 580         }
 581         return X509_signature_dump(bp, sig, indent);
 582 }
 583
 584 static int
 585 dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 586 {
 587         switch (op) {
 588         case ASN1_PKEY_CTRL_PKCS7_SIGN:
 589                 if (arg1 == 0) {
 590                         int snid, hnid;
 591                         X509_ALGOR *alg1, *alg2;
 592
 593                         PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
 594                         if (alg1 == NULL || alg1->algorithm == NULL)
 595                                 return -1;
 596                         hnid = OBJ_obj2nid(alg1->algorithm);
 597                         if (hnid == NID_undef)
 598                                 return -1;
 599                         if (!OBJ_find_sigid_by_algs(&snid, hnid,
 600                             EVP_PKEY_id(pkey)))
 601                                 return -1;
 602                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF,
 603                             0);
 604                 }
 605                 return 1;
 606
 607         case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 608                 *(int *)arg2 = NID_sha1;
 609                 return 2;
 610
 611         default:
 612                 return -2;
 613         }
 614 }
 615
 616 /* NB these are sorted in pkey_id order, lowest first */
 617
 618 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = {
 619         {
 620                 .pkey_id = EVP_PKEY_DSA2,
 621                 .pkey_base_id = EVP_PKEY_DSA,
 622                 .pkey_flags = ASN1_PKEY_ALIAS
 623         },
 624
 625         {
 626                 .pkey_id = EVP_PKEY_DSA1,
 627                 .pkey_base_id = EVP_PKEY_DSA,
 628                 .pkey_flags = ASN1_PKEY_ALIAS
 629         },
 630
 631         {
 632                 .pkey_id = EVP_PKEY_DSA4,
 633                 .pkey_base_id = EVP_PKEY_DSA,
 634                 .pkey_flags = ASN1_PKEY_ALIAS
 635         },
 636
 637         {
 638                 .pkey_id = EVP_PKEY_DSA3,
 639                 .pkey_base_id = EVP_PKEY_DSA,
 640                 .pkey_flags = ASN1_PKEY_ALIAS
 641         },
 642
 643         {
 644                 .pkey_id = EVP_PKEY_DSA,
 645                 .pkey_base_id = EVP_PKEY_DSA,
 646
 647                 .pem_str = "DSA",
 648                 .info = "OpenSSL DSA method",
 649
 650                 .pub_decode = dsa_pub_decode,
 651                 .pub_encode = dsa_pub_encode,
 652                 .pub_cmp = dsa_pub_cmp,
 653                 .pub_print = dsa_pub_print,
 654
 655                 .priv_decode = dsa_priv_decode,
 656                 .priv_encode = dsa_priv_encode,
 657                 .priv_print = dsa_priv_print,
 658
 659                 .pkey_size = int_dsa_size,
 660                 .pkey_bits = dsa_bits,
 661
 662                 .param_decode = dsa_param_decode,
 663                 .param_encode = dsa_param_encode,
 664                 .param_missing = dsa_missing_parameters,
 665                 .param_copy = dsa_copy_parameters,
 666                 .param_cmp = dsa_cmp_parameters,
 667                 .param_print = dsa_param_print,
 668                 .sig_print = dsa_sig_print,
 669
 670                 .pkey_free = int_dsa_free,
 671                 .pkey_ctrl = dsa_pkey_ctrl,
 672                 .old_priv_decode = old_dsa_priv_decode,
 673                 .old_priv_encode = old_dsa_priv_encode
 674         }
 675 };