crypto/dsa/dsa_ameth.c

   1 /* Written by Dr Stephen N Henson (steve@openssl.org) 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                 /*-
 217                  * Handle Two broken types:
 218                  * SEQUENCE {parameters, priv_key}
 219                  * SEQUENCE {pub_key, priv_key}
 220                  */
 221
 222                 t1 = sk_ASN1_TYPE_value(ndsa, 0);
 223                 t2 = sk_ASN1_TYPE_value(ndsa, 1);
 224                 if (t1->type == V_ASN1_SEQUENCE)
 225                         {
 226                         p8->broken = PKCS8_EMBEDDED_PARAM;
 227                         pval = t1->value.ptr;
 228                         }
 229                 else if (ptype == V_ASN1_SEQUENCE)
 230                         p8->broken = PKCS8_NS_DB;
 231                 else
 232                         goto decerr;
 233
 234                 if (t2->type != V_ASN1_INTEGER)
 235                         goto decerr;
 236
 237                 privkey = t2->value.integer;
 238                 }
 239         else
 240                 {
 241                 const unsigned char *q = p;
 242                 if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
 243                         goto decerr;
 244                 if (privkey->type == V_ASN1_NEG_INTEGER)
 245                         {
 246                         p8->broken = PKCS8_NEG_PRIVKEY;
 247                         ASN1_INTEGER_free(privkey);
 248                         if (!(privkey=d2i_ASN1_UINTEGER(NULL, &q, pklen)))
 249                                 goto decerr;
 250                         }
 251                 if (ptype != V_ASN1_SEQUENCE)
 252                         goto decerr;
 253                 }
 254
 255         pstr = pval;
 256         pm = pstr->data;
 257         pmlen = pstr->length;
 258         if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
 259                 goto decerr;
 260         /* We have parameters now set private key */
 261         if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
 262                 {
 263                 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
 264                 goto dsaerr;
 265                 }
 266         /* Calculate public key */
 267         if (!(dsa->pub_key = BN_new()))
 268                 {
 269                 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 270                 goto dsaerr;
 271                 }
 272         if (!(ctx = BN_CTX_new()))
 273                 {
 274                 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 275                 goto dsaerr;
 276                 }
 277
 278         if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
 279                 {
 280                 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
 281                 goto dsaerr;
 282                 }
 283
 284         EVP_PKEY_assign_DSA(pkey, dsa);
 285         BN_CTX_free (ctx);
 286         if(ndsa)
 287                 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 288         else
 289                 ASN1_INTEGER_free(privkey);
 290
 291         return 1;
 292
 293         decerr:
 294         DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
 295         dsaerr:
 296         BN_CTX_free (ctx);
 297         if (privkey)
 298                 ASN1_INTEGER_free(privkey);
 299         sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 300         DSA_free(dsa);
 301         return 0;
 302         }
 303
 304 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 305 {
 306         ASN1_STRING *params = NULL;
 307         ASN1_INTEGER *prkey = NULL;
 308         unsigned char *dp = NULL;
 309         int dplen;
 310
 311         if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key)
 312                 {
 313                 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_MISSING_PARAMETERS);
 314                 goto err;
 315                 }
 316
 317         params = ASN1_STRING_new();
 318
 319         if (!params)
 320                 {
 321                 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
 322                 goto err;
 323                 }
 324
 325         params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
 326         if (params->length <= 0)
 327                 {
 328                 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
 329                 goto err;
 330                 }
 331         params->type = V_ASN1_SEQUENCE;
 332
 333         /* Get private key into integer */
 334         prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
 335
 336         if (!prkey)
 337                 {
 338                 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
 339                 goto err;
 340                 }
 341
 342         dplen = i2d_ASN1_INTEGER(prkey, &dp);
 343
 344         ASN1_INTEGER_free(prkey);
 345
 346         if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
 347                                 V_ASN1_SEQUENCE, params, dp, dplen))
 348                 goto err;
 349
 350         return 1;
 351
 352 err:
 353         if (dp != NULL)
 354                 OPENSSL_free(dp);
 355         if (params != NULL)
 356                 ASN1_STRING_free(params);
 357         if (prkey != NULL)
 358                 ASN1_INTEGER_free(prkey);
 359         return 0;
 360 }
 361
 362 static int int_dsa_size(const EVP_PKEY *pkey)
 363         {
 364         return(DSA_size(pkey->pkey.dsa));
 365         }
 366
 367 static int dsa_bits(const EVP_PKEY *pkey)
 368         {
 369         return BN_num_bits(pkey->pkey.dsa->p);
 370         }
 371
 372 static int dsa_security_bits(const EVP_PKEY *pkey)
 373         {
 374         return DSA_security_bits(pkey->pkey.dsa);
 375         }
 376
 377 static int dsa_missing_parameters(const EVP_PKEY *pkey)
 378         {
 379         DSA *dsa;
 380         dsa=pkey->pkey.dsa;
 381         if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
 382                         return 1;
 383         return 0;
 384         }
 385
 386 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 387         {
 388         BIGNUM *a;
 389
 390         if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
 391                 return 0;
 392         if (to->pkey.dsa->p != NULL)
 393                 BN_free(to->pkey.dsa->p);
 394         to->pkey.dsa->p=a;
 395
 396         if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
 397                 return 0;
 398         if (to->pkey.dsa->q != NULL)
 399                 BN_free(to->pkey.dsa->q);
 400         to->pkey.dsa->q=a;
 401
 402         if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
 403                 return 0;
 404         if (to->pkey.dsa->g != NULL)
 405                 BN_free(to->pkey.dsa->g);
 406         to->pkey.dsa->g=a;
 407         return 1;
 408         }
 409
 410 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 411         {
 412         if (    BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
 413                 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
 414                 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
 415                 return 0;
 416         else
 417                 return 1;
 418         }
 419
 420 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 421         {
 422         if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
 423                 return 0;
 424         else
 425                 return 1;
 426         }
 427
 428 static void int_dsa_free(EVP_PKEY *pkey)
 429         {
 430         DSA_free(pkey->pkey.dsa);
 431         }
 432
 433 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
 434         {
 435         size_t i;
 436         if (!b)
 437                 return;
 438         if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
 439                         *pbuflen = i;
 440         }
 441
 442 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
 443         {
 444         unsigned char *m=NULL;
 445         int ret=0;
 446         size_t buf_len=0;
 447         const char *ktype = NULL;
 448
 449         const BIGNUM *priv_key, *pub_key;
 450
 451         if (ptype == 2)
 452                 priv_key = x->priv_key;
 453         else
 454                 priv_key = NULL;
 455
 456         if (ptype > 0)
 457                 pub_key = x->pub_key;
 458         else
 459                 pub_key = NULL;
 460
 461         if (ptype == 2)
 462                 ktype = "Private-Key";
 463         else if (ptype == 1)
 464                 ktype = "Public-Key";
 465         else
 466                 ktype = "DSA-Parameters";
 467
 468         update_buflen(x->p, &buf_len);
 469         update_buflen(x->q, &buf_len);
 470         update_buflen(x->g, &buf_len);
 471         update_buflen(priv_key, &buf_len);
 472         update_buflen(pub_key, &buf_len);
 473
 474         m=(unsigned char *)OPENSSL_malloc(buf_len+10);
 475         if (m == NULL)
 476                 {
 477                 DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
 478                 goto err;
 479                 }
 480
 481         if (priv_key)
 482                 {
 483                 if(!BIO_indent(bp,off,128))
 484                    goto err;
 485                 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
 486                         <= 0) goto err;
 487                 }
 488
 489         if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
 490                 goto err;
 491         if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
 492                 goto err;
 493         if (!ASN1_bn_print(bp,"P:   ",x->p,m,off)) goto err;
 494         if (!ASN1_bn_print(bp,"Q:   ",x->q,m,off)) goto err;
 495         if (!ASN1_bn_print(bp,"G:   ",x->g,m,off)) goto err;
 496         ret=1;
 497 err:
 498         if (m != NULL) OPENSSL_free(m);
 499         return(ret);
 500         }
 501
 502 static int dsa_param_decode(EVP_PKEY *pkey,
 503                                         const unsigned char **pder, int derlen)
 504         {
 505         DSA *dsa;
 506         if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
 507                 {
 508                 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
 509                 return 0;
 510                 }
 511         EVP_PKEY_assign_DSA(pkey, dsa);
 512         return 1;
 513         }
 514
 515 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 516         {
 517         return i2d_DSAparams(pkey->pkey.dsa, pder);
 518         }
 519
 520 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 521                                                         ASN1_PCTX *ctx)
 522         {
 523         return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
 524         }
 525
 526 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 527                                                         ASN1_PCTX *ctx)
 528         {
 529         return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
 530         }
 531
 532
 533 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 534                                                         ASN1_PCTX *ctx)
 535         {
 536         return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
 537         }
 538
 539 static int old_dsa_priv_decode(EVP_PKEY *pkey,
 540                                         const unsigned char **pder, int derlen)
 541         {
 542         DSA *dsa;
 543         if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
 544                 {
 545                 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
 546                 return 0;
 547                 }
 548         EVP_PKEY_assign_DSA(pkey, dsa);
 549         return 1;
 550         }
 551
 552 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 553         {
 554         return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
 555         }
 556
 557 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
 558                                         const ASN1_STRING *sig,
 559                                         int indent, ASN1_PCTX *pctx)
 560         {
 561         DSA_SIG *dsa_sig;
 562         const unsigned char *p;
 563         if (!sig)
 564                 {
 565                 if (BIO_puts(bp, "\n") <= 0)
 566                         return 0;
 567                 else
 568                         return 1;
 569                 }
 570         p = sig->data;
 571         dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
 572         if (dsa_sig)
 573                 {
 574                 int rv = 0;
 575                 size_t buf_len = 0;
 576                 unsigned char *m=NULL;
 577                 update_buflen(dsa_sig->r, &buf_len);
 578                 update_buflen(dsa_sig->s, &buf_len);
 579                 m = OPENSSL_malloc(buf_len+10);
 580                 if (m == NULL)
 581                         {
 582                         DSAerr(DSA_F_DSA_SIG_PRINT,ERR_R_MALLOC_FAILURE);
 583                         goto err;
 584                         }
 585
 586                 if (BIO_write(bp, "\n", 1) != 1)
 587                         goto err;
 588
 589                 if (!ASN1_bn_print(bp,"r:   ",dsa_sig->r,m,indent))
 590                         goto err;
 591                 if (!ASN1_bn_print(bp,"s:   ",dsa_sig->s,m,indent))
 592                         goto err;
 593                 rv = 1;
 594                 err:
 595                 if (m)
 596                         OPENSSL_free(m);
 597                 DSA_SIG_free(dsa_sig);
 598                 return rv;
 599                 }
 600         return X509_signature_dump(bp, sig, indent);
 601         }
 602
 603 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 604         {
 605         switch (op)
 606                 {
 607                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 608                 if (arg1 == 0)
 609                         {
 610                         int snid, hnid;
 611                         X509_ALGOR *alg1, *alg2;
 612                         PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
 613                         if (alg1 == NULL || alg1->algorithm == NULL)
 614                                 return -1;
 615                         hnid = OBJ_obj2nid(alg1->algorithm);
 616                         if (hnid == NID_undef)
 617                                 return -1;
 618                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 619                                 return -1;
 620                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 621                         }
 622                 return 1;
 623 #ifndef OPENSSL_NO_CMS
 624                 case ASN1_PKEY_CTRL_CMS_SIGN:
 625                 if (arg1 == 0)
 626                         {
 627                         int snid, hnid;
 628                         X509_ALGOR *alg1, *alg2;
 629                         CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
 630                         if (alg1 == NULL || alg1->algorithm == NULL)
 631                                 return -1;
 632                         hnid = OBJ_obj2nid(alg1->algorithm);
 633                         if (hnid == NID_undef)
 634                                 return -1;
 635                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 636                                 return -1;
 637                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 638                         }
 639                 return 1;
 640
 641                 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
 642                 *(int *)arg2 = CMS_RECIPINFO_NONE;
 643                 return 1;
 644 #endif
 645
 646                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 647                 *(int *)arg2 = NID_sha256;
 648                 return 2;
 649
 650                 default:
 651                 return -2;
 652
 653                 }
 654
 655         }
 656
 657 /* NB these are sorted in pkey_id order, lowest first */
 658
 659 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
 660         {
 661
 662                 {
 663                 EVP_PKEY_DSA2,
 664                 EVP_PKEY_DSA,
 665                 ASN1_PKEY_ALIAS
 666                 },
 667
 668                 {
 669                 EVP_PKEY_DSA1,
 670                 EVP_PKEY_DSA,
 671                 ASN1_PKEY_ALIAS
 672                 },
 673
 674                 {
 675                 EVP_PKEY_DSA4,
 676                 EVP_PKEY_DSA,
 677                 ASN1_PKEY_ALIAS
 678                 },
 679
 680                 {
 681                 EVP_PKEY_DSA3,
 682                 EVP_PKEY_DSA,
 683                 ASN1_PKEY_ALIAS
 684                 },
 685
 686                 {
 687                 EVP_PKEY_DSA,
 688                 EVP_PKEY_DSA,
 689                 0,
 690
 691                 "DSA",
 692                 "OpenSSL DSA method",
 693
 694                 dsa_pub_decode,
 695                 dsa_pub_encode,
 696                 dsa_pub_cmp,
 697                 dsa_pub_print,
 698
 699                 dsa_priv_decode,
 700                 dsa_priv_encode,
 701                 dsa_priv_print,
 702
 703                 int_dsa_size,
 704                 dsa_bits,
 705                 dsa_security_bits,
 706
 707                 dsa_param_decode,
 708                 dsa_param_encode,
 709                 dsa_missing_parameters,
 710                 dsa_copy_parameters,
 711                 dsa_cmp_parameters,
 712                 dsa_param_print,
 713                 dsa_sig_print,
 714
 715                 int_dsa_free,
 716                 dsa_pkey_ctrl,
 717                 old_dsa_priv_decode,
 718                 old_dsa_priv_encode
 719                 }
 720         };