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_missing_parameters(const EVP_PKEY *pkey)
 373         {
 374         DSA *dsa;
 375         dsa=pkey->pkey.dsa;
 376         if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
 377                         return 1;
 378         return 0;
 379         }
 380
 381 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 382         {
 383         BIGNUM *a;
 384
 385         if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
 386                 return 0;
 387         if (to->pkey.dsa->p != NULL)
 388                 BN_free(to->pkey.dsa->p);
 389         to->pkey.dsa->p=a;
 390
 391         if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
 392                 return 0;
 393         if (to->pkey.dsa->q != NULL)
 394                 BN_free(to->pkey.dsa->q);
 395         to->pkey.dsa->q=a;
 396
 397         if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
 398                 return 0;
 399         if (to->pkey.dsa->g != NULL)
 400                 BN_free(to->pkey.dsa->g);
 401         to->pkey.dsa->g=a;
 402         return 1;
 403         }
 404
 405 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 406         {
 407         if (    BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
 408                 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
 409                 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
 410                 return 0;
 411         else
 412                 return 1;
 413         }
 414
 415 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 416         {
 417         if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
 418                 return 0;
 419         else
 420                 return 1;
 421         }
 422
 423 static void int_dsa_free(EVP_PKEY *pkey)
 424         {
 425         DSA_free(pkey->pkey.dsa);
 426         }
 427
 428 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
 429         {
 430         size_t i;
 431         if (!b)
 432                 return;
 433         if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
 434                         *pbuflen = i;
 435         }
 436
 437 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
 438         {
 439         unsigned char *m=NULL;
 440         int ret=0;
 441         size_t buf_len=0;
 442         const char *ktype = NULL;
 443
 444         const BIGNUM *priv_key, *pub_key;
 445
 446         if (ptype == 2)
 447                 priv_key = x->priv_key;
 448         else
 449                 priv_key = NULL;
 450
 451         if (ptype > 0)
 452                 pub_key = x->pub_key;
 453         else
 454                 pub_key = NULL;
 455
 456         if (ptype == 2)
 457                 ktype = "Private-Key";
 458         else if (ptype == 1)
 459                 ktype = "Public-Key";
 460         else
 461                 ktype = "DSA-Parameters";
 462
 463         update_buflen(x->p, &buf_len);
 464         update_buflen(x->q, &buf_len);
 465         update_buflen(x->g, &buf_len);
 466         update_buflen(priv_key, &buf_len);
 467         update_buflen(pub_key, &buf_len);
 468
 469         m=(unsigned char *)OPENSSL_malloc(buf_len+10);
 470         if (m == NULL)
 471                 {
 472                 DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
 473                 goto err;
 474                 }
 475
 476         if (priv_key)
 477                 {
 478                 if(!BIO_indent(bp,off,128))
 479                    goto err;
 480                 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
 481                         <= 0) goto err;
 482                 }
 483
 484         if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
 485                 goto err;
 486         if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
 487                 goto err;
 488         if (!ASN1_bn_print(bp,"P:   ",x->p,m,off)) goto err;
 489         if (!ASN1_bn_print(bp,"Q:   ",x->q,m,off)) goto err;
 490         if (!ASN1_bn_print(bp,"G:   ",x->g,m,off)) goto err;
 491         ret=1;
 492 err:
 493         if (m != NULL) OPENSSL_free(m);
 494         return(ret);
 495         }
 496
 497 static int dsa_param_decode(EVP_PKEY *pkey,
 498                                         const unsigned char **pder, int derlen)
 499         {
 500         DSA *dsa;
 501         if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
 502                 {
 503                 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
 504                 return 0;
 505                 }
 506         EVP_PKEY_assign_DSA(pkey, dsa);
 507         return 1;
 508         }
 509
 510 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 511         {
 512         return i2d_DSAparams(pkey->pkey.dsa, pder);
 513         }
 514
 515 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 516                                                         ASN1_PCTX *ctx)
 517         {
 518         return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
 519         }
 520
 521 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 522                                                         ASN1_PCTX *ctx)
 523         {
 524         return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
 525         }
 526
 527
 528 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 529                                                         ASN1_PCTX *ctx)
 530         {
 531         return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
 532         }
 533
 534 static int old_dsa_priv_decode(EVP_PKEY *pkey,
 535                                         const unsigned char **pder, int derlen)
 536         {
 537         DSA *dsa;
 538         if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
 539                 {
 540                 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
 541                 return 0;
 542                 }
 543         EVP_PKEY_assign_DSA(pkey, dsa);
 544         return 1;
 545         }
 546
 547 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 548         {
 549         return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
 550         }
 551
 552 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
 553                                         const ASN1_STRING *sig,
 554                                         int indent, ASN1_PCTX *pctx)
 555         {
 556         DSA_SIG *dsa_sig;
 557         const unsigned char *p;
 558         if (!sig)
 559                 {
 560                 if (BIO_puts(bp, "\n") <= 0)
 561                         return 0;
 562                 else
 563                         return 1;
 564                 }
 565         p = sig->data;
 566         dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
 567         if (dsa_sig)
 568                 {
 569                 int rv = 0;
 570                 size_t buf_len = 0;
 571                 unsigned char *m=NULL;
 572                 update_buflen(dsa_sig->r, &buf_len);
 573                 update_buflen(dsa_sig->s, &buf_len);
 574                 m = OPENSSL_malloc(buf_len+10);
 575                 if (m == NULL)
 576                         {
 577                         DSAerr(DSA_F_DSA_SIG_PRINT,ERR_R_MALLOC_FAILURE);
 578                         goto err;
 579                         }
 580
 581                 if (BIO_write(bp, "\n", 1) != 1)
 582                         goto err;
 583
 584                 if (!ASN1_bn_print(bp,"r:   ",dsa_sig->r,m,indent))
 585                         goto err;
 586                 if (!ASN1_bn_print(bp,"s:   ",dsa_sig->s,m,indent))
 587                         goto err;
 588                 rv = 1;
 589                 err:
 590                 if (m)
 591                         OPENSSL_free(m);
 592                 DSA_SIG_free(dsa_sig);
 593                 return rv;
 594                 }
 595         return X509_signature_dump(bp, sig, indent);
 596         }
 597
 598 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 599         {
 600         switch (op)
 601                 {
 602                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 603                 if (arg1 == 0)
 604                         {
 605                         int snid, hnid;
 606                         X509_ALGOR *alg1, *alg2;
 607                         PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
 608                         if (alg1 == NULL || alg1->algorithm == NULL)
 609                                 return -1;
 610                         hnid = OBJ_obj2nid(alg1->algorithm);
 611                         if (hnid == NID_undef)
 612                                 return -1;
 613                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 614                                 return -1;
 615                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 616                         }
 617                 return 1;
 618 #ifndef OPENSSL_NO_CMS
 619                 case ASN1_PKEY_CTRL_CMS_SIGN:
 620                 if (arg1 == 0)
 621                         {
 622                         int snid, hnid;
 623                         X509_ALGOR *alg1, *alg2;
 624                         CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
 625                         if (alg1 == NULL || alg1->algorithm == NULL)
 626                                 return -1;
 627                         hnid = OBJ_obj2nid(alg1->algorithm);
 628                         if (hnid == NID_undef)
 629                                 return -1;
 630                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 631                                 return -1;
 632                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 633                         }
 634                 return 1;
 635
 636                 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
 637                 *(int *)arg2 = CMS_RECIPINFO_NONE;
 638                 return 1;
 639 #endif
 640
 641                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 642                 *(int *)arg2 = NID_sha256;
 643                 return 2;
 644
 645                 default:
 646                 return -2;
 647
 648                 }
 649
 650         }
 651
 652 /* NB these are sorted in pkey_id order, lowest first */
 653
 654 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
 655         {
 656
 657                 {
 658                 EVP_PKEY_DSA2,
 659                 EVP_PKEY_DSA,
 660                 ASN1_PKEY_ALIAS
 661                 },
 662
 663                 {
 664                 EVP_PKEY_DSA1,
 665                 EVP_PKEY_DSA,
 666                 ASN1_PKEY_ALIAS
 667                 },
 668
 669                 {
 670                 EVP_PKEY_DSA4,
 671                 EVP_PKEY_DSA,
 672                 ASN1_PKEY_ALIAS
 673                 },
 674
 675                 {
 676                 EVP_PKEY_DSA3,
 677                 EVP_PKEY_DSA,
 678                 ASN1_PKEY_ALIAS
 679                 },
 680
 681                 {
 682                 EVP_PKEY_DSA,
 683                 EVP_PKEY_DSA,
 684                 0,
 685
 686                 "DSA",
 687                 "OpenSSL DSA method",
 688
 689                 dsa_pub_decode,
 690                 dsa_pub_encode,
 691                 dsa_pub_cmp,
 692                 dsa_pub_print,
 693
 694                 dsa_priv_decode,
 695                 dsa_priv_encode,
 696                 dsa_priv_print,
 697
 698                 int_dsa_size,
 699                 dsa_bits,
 700
 701                 dsa_param_decode,
 702                 dsa_param_encode,
 703                 dsa_missing_parameters,
 704                 dsa_copy_parameters,
 705                 dsa_cmp_parameters,
 706                 dsa_param_print,
 707                 dsa_sig_print,
 708
 709                 int_dsa_free,
 710                 dsa_pkey_ctrl,
 711                 old_dsa_priv_decode,
 712                 old_dsa_priv_encode
 713                 }
 714         };