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 #ifndef OPENSSL_NO_CMS
  64 #include <openssl/cms.h>
  65 #endif
  66 #include "asn1_locl.h"
  67
  68 static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
  69         {
  70         const unsigned char *p, *pm;
  71         int pklen, pmlen;
  72         int ptype;
  73         void *pval;
  74         ASN1_STRING *pstr;
  75         X509_ALGOR *palg;
  76         ASN1_INTEGER *public_key = NULL;
  77
  78         DSA *dsa = NULL;
  79
  80         if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
  81                 return 0;
  82         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
  83
  84
  85         if (ptype == V_ASN1_SEQUENCE)
  86                 {
  87                 pstr = pval;
  88                 pm = pstr->data;
  89                 pmlen = pstr->length;
  90
  91                 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
  92                         {
  93                         DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
  94                         goto err;
  95                         }
  96
  97                 }
  98         else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF))
  99                 {
 100                 if (!(dsa = DSA_new()))
 101                         {
 102                         DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
 103                         goto err;
 104                         }
 105                 }
 106         else
 107                 {
 108                 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
 109                 goto err;
 110                 }
 111
 112         if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
 113                 {
 114                 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
 115                 goto err;
 116                 }
 117
 118         if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
 119                 {
 120                 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
 121                 goto err;
 122                 }
 123
 124         ASN1_INTEGER_free(public_key);
 125         EVP_PKEY_assign_DSA(pkey, dsa);
 126         return 1;
 127
 128         err:
 129         if (public_key)
 130                 ASN1_INTEGER_free(public_key);
 131         if (dsa)
 132                 DSA_free(dsa);
 133         return 0;
 134
 135         }
 136
 137 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
 138         {
 139         DSA *dsa;
 140         void *pval = NULL;
 141         int ptype;
 142         unsigned char *penc = NULL;
 143         int penclen;
 144
 145         dsa=pkey->pkey.dsa;
 146         if (pkey->save_parameters && dsa->p && dsa->q && dsa->g)
 147                 {
 148                 ASN1_STRING *str;
 149                 str = ASN1_STRING_new();
 150                 str->length = i2d_DSAparams(dsa, &str->data);
 151                 if (str->length <= 0)
 152                         {
 153                         DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 154                         goto err;
 155                         }
 156                 pval = str;
 157                 ptype = V_ASN1_SEQUENCE;
 158                 }
 159         else
 160                 ptype = V_ASN1_UNDEF;
 161
 162         dsa->write_params=0;
 163
 164         penclen = i2d_DSAPublicKey(dsa, &penc);
 165
 166         if (penclen <= 0)
 167                 {
 168                 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 169                 goto err;
 170                 }
 171
 172         if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
 173                                 ptype, pval, penc, penclen))
 174                 return 1;
 175
 176         err:
 177         if (penc)
 178                 OPENSSL_free(penc);
 179         if (pval)
 180                 ASN1_STRING_free(pval);
 181
 182         return 0;
 183         }
 184
 185 /* In PKCS#8 DSA: you just get a private key integer and parameters in the
 186  * AlgorithmIdentifier the pubkey must be recalculated.
 187  */
 188
 189 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
 190         {
 191         const unsigned char *p, *pm;
 192         int pklen, pmlen;
 193         int ptype;
 194         void *pval;
 195         ASN1_STRING *pstr;
 196         X509_ALGOR *palg;
 197         ASN1_INTEGER *privkey = NULL;
 198         BN_CTX *ctx = NULL;
 199
 200         STACK_OF(ASN1_TYPE) *ndsa = NULL;
 201         DSA *dsa = NULL;
 202
 203         if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
 204                 return 0;
 205         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 206
 207         /* Check for broken DSA PKCS#8, UGH! */
 208         if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
 209                 {
 210                 ASN1_TYPE *t1, *t2;
 211                 if(!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)));
 212                         goto decerr;
 213                 if (sk_ASN1_TYPE_num(ndsa) != 2)
 214                         goto decerr;
 215                 /* Handle Two broken types:
 216                  * SEQUENCE {parameters, priv_key}
 217                  * SEQUENCE {pub_key, priv_key}
 218                  */
 219
 220                 t1 = sk_ASN1_TYPE_value(ndsa, 0);
 221                 t2 = sk_ASN1_TYPE_value(ndsa, 1);
 222                 if (t1->type == V_ASN1_SEQUENCE)
 223                         {
 224                         p8->broken = PKCS8_EMBEDDED_PARAM;
 225                         pval = t1->value.ptr;
 226                         }
 227                 else if (ptype == V_ASN1_SEQUENCE)
 228                         p8->broken = PKCS8_NS_DB;
 229                 else
 230                         goto decerr;
 231
 232                 if (t2->type != V_ASN1_INTEGER)
 233                         goto decerr;
 234
 235                 privkey = t2->value.integer;
 236                 }
 237         else
 238                 {
 239                 if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
 240                         goto decerr;
 241                 if (ptype != V_ASN1_SEQUENCE)
 242                         goto decerr;
 243                 }
 244
 245         pstr = pval;
 246         pm = pstr->data;
 247         pmlen = pstr->length;
 248         if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
 249                 goto decerr;
 250         /* We have parameters now set private key */
 251         if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
 252                 {
 253                 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
 254                 goto dsaerr;
 255                 }
 256         /* Calculate public key */
 257         if (!(dsa->pub_key = BN_new()))
 258                 {
 259                 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 260                 goto dsaerr;
 261                 }
 262         if (!(ctx = BN_CTX_new()))
 263                 {
 264                 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 265                 goto dsaerr;
 266                 }
 267
 268         if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
 269                 {
 270                 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
 271                 goto dsaerr;
 272                 }
 273
 274         EVP_PKEY_assign_DSA(pkey, dsa);
 275         BN_CTX_free (ctx);
 276         if(ndsa)
 277                 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 278         else
 279                 ASN1_INTEGER_free(privkey);
 280
 281         return 1;
 282
 283         decerr:
 284         DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
 285         dsaerr:
 286         BN_CTX_free (ctx);
 287         if (privkey)
 288                 ASN1_INTEGER_free(privkey);
 289         sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 290         DSA_free(dsa);
 291         return 0;
 292         }
 293
 294 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 295 {
 296         ASN1_STRING *params = NULL;
 297         ASN1_INTEGER *prkey = NULL;
 298         unsigned char *dp = NULL;
 299         int dplen;
 300
 301         params = ASN1_STRING_new();
 302
 303         if (!params)
 304                 {
 305                 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
 306                 goto err;
 307                 }
 308
 309         params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
 310         if (params->length <= 0)
 311                 {
 312                 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
 313                 goto err;
 314                 }
 315         params->type = V_ASN1_SEQUENCE;
 316
 317         /* Get private key into integer */
 318         prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
 319
 320         if (!prkey)
 321                 {
 322                 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
 323                 goto err;
 324                 }
 325
 326         dplen = i2d_ASN1_INTEGER(prkey, &dp);
 327
 328         ASN1_INTEGER_free(prkey);
 329
 330         if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
 331                                 V_ASN1_SEQUENCE, params, dp, dplen))
 332                 goto err;
 333
 334         return 1;
 335
 336 err:
 337         if (dp != NULL)
 338                 OPENSSL_free(dp);
 339         if (params != NULL)
 340                 ASN1_STRING_free(params);
 341         if (prkey != NULL)
 342                 ASN1_INTEGER_free(prkey);
 343         return 0;
 344 }
 345
 346 static int int_dsa_size(const EVP_PKEY *pkey)
 347         {
 348         return(DSA_size(pkey->pkey.dsa));
 349         }
 350
 351 static int dsa_bits(const EVP_PKEY *pkey)
 352         {
 353         return BN_num_bits(pkey->pkey.dsa->p);
 354         }
 355
 356 static int dsa_missing_parameters(const EVP_PKEY *pkey)
 357         {
 358         DSA *dsa;
 359         dsa=pkey->pkey.dsa;
 360         if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
 361                         return 1;
 362         return 0;
 363         }
 364
 365 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 366         {
 367         BIGNUM *a;
 368
 369         if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
 370                 return 0;
 371         if (to->pkey.dsa->p != NULL)
 372                 BN_free(to->pkey.dsa->p);
 373         to->pkey.dsa->p=a;
 374
 375         if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
 376                 return 0;
 377         if (to->pkey.dsa->q != NULL)
 378                 BN_free(to->pkey.dsa->q);
 379         to->pkey.dsa->q=a;
 380
 381         if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
 382                 return 0;
 383         if (to->pkey.dsa->g != NULL)
 384                 BN_free(to->pkey.dsa->g);
 385         to->pkey.dsa->g=a;
 386         return 1;
 387         }
 388
 389 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 390         {
 391         if (    BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
 392                 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
 393                 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
 394                 return 0;
 395         else
 396                 return 1;
 397         }
 398
 399 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 400         {
 401         if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
 402                 return 0;
 403         else
 404                 return 1;
 405         }
 406
 407 static void int_dsa_free(EVP_PKEY *pkey)
 408         {
 409         DSA_free(pkey->pkey.dsa);
 410         }
 411
 412 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
 413         {
 414         size_t i;
 415         if (!b)
 416                 return;
 417         if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
 418                         *pbuflen = i;
 419         }
 420
 421 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
 422         {
 423         unsigned char *m=NULL;
 424         int ret=0;
 425         size_t buf_len=0;
 426         const char *ktype = NULL;
 427
 428         const BIGNUM *priv_key, *pub_key;
 429
 430         if (ptype == 2)
 431                 priv_key = x->priv_key;
 432         else
 433                 priv_key = NULL;
 434
 435         if (ptype > 0)
 436                 pub_key = x->pub_key;
 437         else
 438                 pub_key = NULL;
 439
 440         if (ptype == 2)
 441                 ktype = "Private-Key";
 442         else if (ptype == 1)
 443                 ktype = "Public-Key";
 444         else
 445                 ktype = "DSA-Parameters";
 446
 447         update_buflen(x->p, &buf_len);
 448         update_buflen(x->q, &buf_len);
 449         update_buflen(x->g, &buf_len);
 450         update_buflen(priv_key, &buf_len);
 451         update_buflen(pub_key, &buf_len);
 452
 453         m=(unsigned char *)OPENSSL_malloc(buf_len+10);
 454         if (m == NULL)
 455                 {
 456                 DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
 457                 goto err;
 458                 }
 459
 460         if (priv_key)
 461                 {
 462                 if(!BIO_indent(bp,off,128))
 463                    goto err;
 464                 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
 465                         <= 0) goto err;
 466                 }
 467
 468         if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
 469                 goto err;
 470         if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
 471                 goto err;
 472         if (!ASN1_bn_print(bp,"P:   ",x->p,m,off)) goto err;
 473         if (!ASN1_bn_print(bp,"Q:   ",x->q,m,off)) goto err;
 474         if (!ASN1_bn_print(bp,"G:   ",x->g,m,off)) goto err;
 475         ret=1;
 476 err:
 477         if (m != NULL) OPENSSL_free(m);
 478         return(ret);
 479         }
 480
 481 static int dsa_param_decode(EVP_PKEY *pkey,
 482                                         const unsigned char **pder, int derlen)
 483         {
 484         DSA *dsa;
 485         if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
 486                 {
 487                 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
 488                 return 0;
 489                 }
 490         EVP_PKEY_assign_DSA(pkey, dsa);
 491         return 1;
 492         }
 493
 494 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 495         {
 496         return i2d_DSAparams(pkey->pkey.dsa, pder);
 497         }
 498
 499 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 500                                                         ASN1_PCTX *ctx)
 501         {
 502         return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
 503         }
 504
 505 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 506                                                         ASN1_PCTX *ctx)
 507         {
 508         return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
 509         }
 510
 511
 512 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 513                                                         ASN1_PCTX *ctx)
 514         {
 515         return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
 516         }
 517
 518 static int old_dsa_priv_decode(EVP_PKEY *pkey,
 519                                         const unsigned char **pder, int derlen)
 520         {
 521         DSA *dsa;
 522         if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
 523                 {
 524                 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
 525                 return 0;
 526                 }
 527         EVP_PKEY_assign_DSA(pkey, dsa);
 528         return 1;
 529         }
 530
 531 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 532         {
 533         return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
 534         }
 535
 536 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 537         {
 538         switch (op)
 539                 {
 540                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 541                 if (arg1 == 0)
 542                         {
 543                         int snid, hnid;
 544                         X509_ALGOR *alg1, *alg2;
 545                         PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
 546                         if (alg1 == NULL || alg1->algorithm == NULL)
 547                                 return -1;
 548                         hnid = OBJ_obj2nid(alg1->algorithm);
 549                         if (hnid == NID_undef)
 550                                 return -1;
 551                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 552                                 return -1;
 553                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 554                         }
 555                 return 1;
 556 #ifndef OPENSSL_NO_CMS
 557                 case ASN1_PKEY_CTRL_CMS_SIGN:
 558                 if (arg1 == 0)
 559                         {
 560                         int snid, hnid;
 561                         X509_ALGOR *alg1, *alg2;
 562                         CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
 563                         if (alg1 == NULL || alg1->algorithm == NULL)
 564                                 return -1;
 565                         hnid = OBJ_obj2nid(alg1->algorithm);
 566                         if (hnid == NID_undef)
 567                                 return -1;
 568                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 569                                 return -1;
 570                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 571                         }
 572                 return 1;
 573 #endif
 574
 575                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 576                 *(int *)arg2 = NID_sha1;
 577                 return 2;
 578
 579                 default:
 580                 return -2;
 581
 582                 }
 583
 584         }
 585
 586 /* NB these are sorted in pkey_id order, lowest first */
 587
 588 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
 589         {
 590
 591                 {
 592                 EVP_PKEY_DSA2,
 593                 EVP_PKEY_DSA,
 594                 ASN1_PKEY_ALIAS
 595                 },
 596
 597                 {
 598                 EVP_PKEY_DSA1,
 599                 EVP_PKEY_DSA,
 600                 ASN1_PKEY_ALIAS
 601                 },
 602
 603                 {
 604                 EVP_PKEY_DSA4,
 605                 EVP_PKEY_DSA,
 606                 ASN1_PKEY_ALIAS
 607                 },
 608
 609                 {
 610                 EVP_PKEY_DSA3,
 611                 EVP_PKEY_DSA,
 612                 ASN1_PKEY_ALIAS
 613                 },
 614
 615                 {
 616                 EVP_PKEY_DSA,
 617                 EVP_PKEY_DSA,
 618                 0,
 619
 620                 "DSA",
 621                 "OpenSSL DSA method",
 622
 623                 dsa_pub_decode,
 624                 dsa_pub_encode,
 625                 dsa_pub_cmp,
 626                 dsa_pub_print,
 627
 628                 dsa_priv_decode,
 629                 dsa_priv_encode,
 630                 dsa_priv_print,
 631
 632                 int_dsa_size,
 633                 dsa_bits,
 634
 635                 dsa_param_decode,
 636                 dsa_param_encode,
 637                 dsa_missing_parameters,
 638                 dsa_copy_parameters,
 639                 dsa_cmp_parameters,
 640                 dsa_param_print,
 641
 642                 int_dsa_free,
 643                 dsa_pkey_ctrl,
 644                 old_dsa_priv_decode,
 645                 old_dsa_priv_encode
 646                 }
 647         };
 648