crypto/dsa/dsa_ameth.c

   1 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   2  * project 2006.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    licensing@OpenSSL.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  *
  52  * This product includes cryptographic software written by Eric Young
  53  * (eay@cryptsoft.com).  This product includes software written by Tim
  54  * Hudson (tjh@cryptsoft.com).
  55  *
  56  */
  57
  58 #include <stdio.h>
  59 #include "cryptlib.h"
  60 #include <openssl/x509.h>
  61 #include <openssl/asn1.h>
  62 #include <openssl/dsa.h>
  63 #include <openssl/bn.h>
  64 #ifndef OPENSSL_NO_CMS
  65 #include <openssl/cms.h>
  66 #endif
  67 #include "asn1_locl.h"
  68
  69 static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
  70         {
  71         const unsigned char *p, *pm;
  72         int pklen, pmlen;
  73         int ptype;
  74         void *pval;
  75         ASN1_STRING *pstr;
  76         X509_ALGOR *palg;
  77         ASN1_INTEGER *public_key = NULL;
  78
  79         DSA *dsa = NULL;
  80
  81         if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
  82                 return 0;
  83         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
  84
  85
  86         if (ptype == V_ASN1_SEQUENCE)
  87                 {
  88                 pstr = pval;
  89                 pm = pstr->data;
  90                 pmlen = pstr->length;
  91
  92                 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
  93                         {
  94                         DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
  95                         goto err;
  96                         }
  97
  98                 }
  99         else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF))
 100                 {
 101                 if (!(dsa = DSA_new()))
 102                         {
 103                         DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
 104                         goto err;
 105                         }
 106                 }
 107         else
 108                 {
 109                 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
 110                 goto err;
 111                 }
 112
 113         if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
 114                 {
 115                 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
 116                 goto err;
 117                 }
 118
 119         if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
 120                 {
 121                 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
 122                 goto err;
 123                 }
 124
 125         ASN1_INTEGER_free(public_key);
 126         EVP_PKEY_assign_DSA(pkey, dsa);
 127         return 1;
 128
 129         err:
 130         if (public_key)
 131                 ASN1_INTEGER_free(public_key);
 132         if (dsa)
 133                 DSA_free(dsa);
 134         return 0;
 135
 136         }
 137
 138 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
 139         {
 140         DSA *dsa;
 141         void *pval = NULL;
 142         int ptype;
 143         unsigned char *penc = NULL;
 144         int penclen;
 145
 146         dsa=pkey->pkey.dsa;
 147         if (pkey->save_parameters && dsa->p && dsa->q && dsa->g)
 148                 {
 149                 ASN1_STRING *str;
 150                 str = ASN1_STRING_new();
 151                 str->length = i2d_DSAparams(dsa, &str->data);
 152                 if (str->length <= 0)
 153                         {
 154                         DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 155                         goto err;
 156                         }
 157                 pval = str;
 158                 ptype = V_ASN1_SEQUENCE;
 159                 }
 160         else
 161                 ptype = V_ASN1_UNDEF;
 162
 163         dsa->write_params=0;
 164
 165         penclen = i2d_DSAPublicKey(dsa, &penc);
 166
 167         if (penclen <= 0)
 168                 {
 169                 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 170                 goto err;
 171                 }
 172
 173         if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
 174                                 ptype, pval, penc, penclen))
 175                 return 1;
 176
 177         err:
 178         if (penc)
 179                 OPENSSL_free(penc);
 180         if (pval)
 181                 ASN1_STRING_free(pval);
 182
 183         return 0;
 184         }
 185
 186 /* In PKCS#8 DSA: you just get a private key integer and parameters in the
 187  * AlgorithmIdentifier the pubkey must be recalculated.
 188  */
 189
 190 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
 191         {
 192         const unsigned char *p, *pm;
 193         int pklen, pmlen;
 194         int ptype;
 195         void *pval;
 196         ASN1_STRING *pstr;
 197         X509_ALGOR *palg;
 198         ASN1_INTEGER *privkey = NULL;
 199         BN_CTX *ctx = NULL;
 200
 201         STACK_OF(ASN1_TYPE) *ndsa = NULL;
 202         DSA *dsa = NULL;
 203
 204         if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
 205                 return 0;
 206         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 207
 208         /* Check for broken DSA PKCS#8, UGH! */
 209         if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
 210                 {
 211                 ASN1_TYPE *t1, *t2;
 212                 if(!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)));
 213                         goto decerr;
 214                 if (sk_ASN1_TYPE_num(ndsa) != 2)
 215                         goto decerr;
 216                 /* Handle Two broken types:
 217                  * SEQUENCE {parameters, priv_key}
 218                  * SEQUENCE {pub_key, priv_key}
 219                  */
 220
 221                 t1 = sk_ASN1_TYPE_value(ndsa, 0);
 222                 t2 = sk_ASN1_TYPE_value(ndsa, 1);
 223                 if (t1->type == V_ASN1_SEQUENCE)
 224                         {
 225                         p8->broken = PKCS8_EMBEDDED_PARAM;
 226                         pval = t1->value.ptr;
 227                         }
 228                 else if (ptype == V_ASN1_SEQUENCE)
 229                         p8->broken = PKCS8_NS_DB;
 230                 else
 231                         goto decerr;
 232
 233                 if (t2->type != V_ASN1_INTEGER)
 234                         goto decerr;
 235
 236                 privkey = t2->value.integer;
 237                 }
 238         else
 239                 {
 240                 if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
 241                         goto decerr;
 242                 if (ptype != V_ASN1_SEQUENCE)
 243                         goto decerr;
 244                 }
 245
 246         pstr = pval;
 247         pm = pstr->data;
 248         pmlen = pstr->length;
 249         if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
 250                 goto decerr;
 251         /* We have parameters now set private key */
 252         if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
 253                 {
 254                 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
 255                 goto dsaerr;
 256                 }
 257         /* Calculate public key */
 258         if (!(dsa->pub_key = BN_new()))
 259                 {
 260                 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 261                 goto dsaerr;
 262                 }
 263         if (!(ctx = BN_CTX_new()))
 264                 {
 265                 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 266                 goto dsaerr;
 267                 }
 268
 269         if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
 270                 {
 271                 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
 272                 goto dsaerr;
 273                 }
 274
 275         EVP_PKEY_assign_DSA(pkey, dsa);
 276         BN_CTX_free (ctx);
 277         if(ndsa)
 278                 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 279         else
 280                 ASN1_INTEGER_free(privkey);
 281
 282         return 1;
 283
 284         decerr:
 285         DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
 286         dsaerr:
 287         BN_CTX_free (ctx);
 288         if (privkey)
 289                 ASN1_INTEGER_free(privkey);
 290         sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 291         DSA_free(dsa);
 292         return 0;
 293         }
 294
 295 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 296 {
 297         ASN1_STRING *params = NULL;
 298         ASN1_INTEGER *prkey = NULL;
 299         unsigned char *dp = NULL;
 300         int dplen;
 301
 302         params = ASN1_STRING_new();
 303
 304         if (!params)
 305                 {
 306                 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
 307                 goto err;
 308                 }
 309
 310         params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
 311         if (params->length <= 0)
 312                 {
 313                 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
 314                 goto err;
 315                 }
 316         params->type = V_ASN1_SEQUENCE;
 317
 318         /* Get private key into integer */
 319         prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
 320
 321         if (!prkey)
 322                 {
 323                 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
 324                 goto err;
 325                 }
 326
 327         dplen = i2d_ASN1_INTEGER(prkey, &dp);
 328
 329         ASN1_INTEGER_free(prkey);
 330
 331         if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
 332                                 V_ASN1_SEQUENCE, params, dp, dplen))
 333                 goto err;
 334
 335         return 1;
 336
 337 err:
 338         if (dp != NULL)
 339                 OPENSSL_free(dp);
 340         if (params != NULL)
 341                 ASN1_STRING_free(params);
 342         if (prkey != NULL)
 343                 ASN1_INTEGER_free(prkey);
 344         return 0;
 345 }
 346
 347 static int int_dsa_size(const EVP_PKEY *pkey)
 348         {
 349         return(DSA_size(pkey->pkey.dsa));
 350         }
 351
 352 static int dsa_bits(const EVP_PKEY *pkey)
 353         {
 354         return BN_num_bits(pkey->pkey.dsa->p);
 355         }
 356
 357 static int dsa_missing_parameters(const EVP_PKEY *pkey)
 358         {
 359         DSA *dsa;
 360         dsa=pkey->pkey.dsa;
 361         if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
 362                         return 1;
 363         return 0;
 364         }
 365
 366 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 367         {
 368         BIGNUM *a;
 369
 370         if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
 371                 return 0;
 372         if (to->pkey.dsa->p != NULL)
 373                 BN_free(to->pkey.dsa->p);
 374         to->pkey.dsa->p=a;
 375
 376         if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
 377                 return 0;
 378         if (to->pkey.dsa->q != NULL)
 379                 BN_free(to->pkey.dsa->q);
 380         to->pkey.dsa->q=a;
 381
 382         if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
 383                 return 0;
 384         if (to->pkey.dsa->g != NULL)
 385                 BN_free(to->pkey.dsa->g);
 386         to->pkey.dsa->g=a;
 387         return 1;
 388         }
 389
 390 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 391         {
 392         if (    BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
 393                 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
 394                 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
 395                 return 0;
 396         else
 397                 return 1;
 398         }
 399
 400 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 401         {
 402         if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
 403                 return 0;
 404         else
 405                 return 1;
 406         }
 407
 408 static void int_dsa_free(EVP_PKEY *pkey)
 409         {
 410         DSA_free(pkey->pkey.dsa);
 411         }
 412
 413 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
 414         {
 415         size_t i;
 416         if (!b)
 417                 return;
 418         if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
 419                         *pbuflen = i;
 420         }
 421
 422 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
 423         {
 424         unsigned char *m=NULL;
 425         int ret=0;
 426         size_t buf_len=0;
 427         const char *ktype = NULL;
 428
 429         const BIGNUM *priv_key, *pub_key;
 430
 431         if (ptype == 2)
 432                 priv_key = x->priv_key;
 433         else
 434                 priv_key = NULL;
 435
 436         if (ptype > 0)
 437                 pub_key = x->pub_key;
 438         else
 439                 pub_key = NULL;
 440
 441         if (ptype == 2)
 442                 ktype = "Private-Key";
 443         else if (ptype == 1)
 444                 ktype = "Public-Key";
 445         else
 446                 ktype = "DSA-Parameters";
 447
 448         update_buflen(x->p, &buf_len);
 449         update_buflen(x->q, &buf_len);
 450         update_buflen(x->g, &buf_len);
 451         update_buflen(priv_key, &buf_len);
 452         update_buflen(pub_key, &buf_len);
 453
 454         m=(unsigned char *)OPENSSL_malloc(buf_len+10);
 455         if (m == NULL)
 456                 {
 457                 DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
 458                 goto err;
 459                 }
 460
 461         if (priv_key)
 462                 {
 463                 if(!BIO_indent(bp,off,128))
 464                    goto err;
 465                 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
 466                         <= 0) goto err;
 467                 }
 468
 469         if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
 470                 goto err;
 471         if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
 472                 goto err;
 473         if (!ASN1_bn_print(bp,"P:   ",x->p,m,off)) goto err;
 474         if (!ASN1_bn_print(bp,"Q:   ",x->q,m,off)) goto err;
 475         if (!ASN1_bn_print(bp,"G:   ",x->g,m,off)) goto err;
 476         ret=1;
 477 err:
 478         if (m != NULL) OPENSSL_free(m);
 479         return(ret);
 480         }
 481
 482 static int dsa_param_decode(EVP_PKEY *pkey,
 483                             const unsigned char **pder, size_t derlen)
 484         {
 485         DSA *dsa;
 486         if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
 487                 {
 488                 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
 489                 return 0;
 490                 }
 491         EVP_PKEY_assign_DSA(pkey, dsa);
 492         return 1;
 493         }
 494
 495 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 496         {
 497         return i2d_DSAparams(pkey->pkey.dsa, pder);
 498         }
 499
 500 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 501                                                         ASN1_PCTX *ctx)
 502         {
 503         return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
 504         }
 505
 506 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 507                                                         ASN1_PCTX *ctx)
 508         {
 509         return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
 510         }
 511
 512
 513 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 514                                                         ASN1_PCTX *ctx)
 515         {
 516         return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
 517         }
 518
 519 static int old_dsa_priv_decode(EVP_PKEY *pkey,
 520                                const unsigned char **pder, size_t derlen)
 521         {
 522         DSA *dsa;
 523         if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
 524                 {
 525                 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
 526                 return 0;
 527                 }
 528         EVP_PKEY_assign_DSA(pkey, dsa);
 529         return 1;
 530         }
 531
 532 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 533         {
 534         return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
 535         }
 536
 537 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 538         {
 539         switch (op)
 540                 {
 541                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 542                 if (arg1 == 0)
 543                         {
 544                         int snid, hnid;
 545                         X509_ALGOR *alg1, *alg2;
 546                         PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
 547                         if (alg1 == NULL || alg1->algorithm == NULL)
 548                                 return -1;
 549                         hnid = OBJ_obj2nid(alg1->algorithm);
 550                         if (hnid == NID_undef)
 551                                 return -1;
 552                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 553                                 return -1;
 554                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 555                         }
 556                 return 1;
 557 #ifndef OPENSSL_NO_CMS
 558                 case ASN1_PKEY_CTRL_CMS_SIGN:
 559                 if (arg1 == 0)
 560                         {
 561                         int snid, hnid;
 562                         X509_ALGOR *alg1, *alg2;
 563                         CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
 564                         if (alg1 == NULL || alg1->algorithm == NULL)
 565                                 return -1;
 566                         hnid = OBJ_obj2nid(alg1->algorithm);
 567                         if (hnid == NID_undef)
 568                                 return -1;
 569                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 570                                 return -1;
 571                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 572                         }
 573                 return 1;
 574 #endif
 575
 576                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 577                 *(int *)arg2 = NID_sha1;
 578                 return 2;
 579
 580                 default:
 581                 return -2;
 582
 583                 }
 584
 585         }
 586
 587 /* NB these are sorted in pkey_id order, lowest first */
 588
 589 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
 590         {
 591
 592                 {
 593                 EVP_PKEY_DSA2,
 594                 EVP_PKEY_DSA,
 595                 ASN1_PKEY_ALIAS
 596                 },
 597
 598                 {
 599                 EVP_PKEY_DSA1,
 600                 EVP_PKEY_DSA,
 601                 ASN1_PKEY_ALIAS
 602                 },
 603
 604                 {
 605                 EVP_PKEY_DSA4,
 606                 EVP_PKEY_DSA,
 607                 ASN1_PKEY_ALIAS
 608                 },
 609
 610                 {
 611                 EVP_PKEY_DSA3,
 612                 EVP_PKEY_DSA,
 613                 ASN1_PKEY_ALIAS
 614                 },
 615
 616                 {
 617                 EVP_PKEY_DSA,
 618                 EVP_PKEY_DSA,
 619                 0,
 620
 621                 "DSA",
 622                 "OpenSSL DSA method",
 623
 624                 dsa_pub_decode,
 625                 dsa_pub_encode,
 626                 dsa_pub_cmp,
 627                 dsa_pub_print,
 628
 629                 dsa_priv_decode,
 630                 dsa_priv_encode,
 631                 dsa_priv_print,
 632
 633                 int_dsa_size,
 634                 dsa_bits,
 635
 636                 dsa_param_decode,
 637                 dsa_param_encode,
 638                 dsa_missing_parameters,
 639                 dsa_copy_parameters,
 640                 dsa_cmp_parameters,
 641                 dsa_param_print,
 642
 643                 int_dsa_free,
 644                 dsa_pkey_ctrl,
 645                 old_dsa_priv_decode,
 646                 old_dsa_priv_encode
 647                 }
 648         };
 649