release/src/router/openssl/crypto/dsa/dsa_ameth.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 2006.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/x509.h>
  62 #include <openssl/asn1.h>
  63 #include <openssl/dsa.h>
  64 #include <openssl/bn.h>
  65 #ifndef OPENSSL_NO_CMS
  66 # include <openssl/cms.h>
  67 #endif
  68 #include "asn1_locl.h"
  69
  70 static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
  71 {
  72     const unsigned char *p, *pm;
  73     int pklen, pmlen;
  74     int ptype;
  75     void *pval;
  76     ASN1_STRING *pstr;
  77     X509_ALGOR *palg;
  78     ASN1_INTEGER *public_key = NULL;
  79
  80     DSA *dsa = NULL;
  81
  82     if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
  83         return 0;
  84     X509_ALGOR_get0(NULL, &ptype, &pval, palg);
  85
  86     if (ptype == V_ASN1_SEQUENCE) {
  87         pstr = pval;
  88         pm = pstr->data;
  89         pmlen = pstr->length;
  90
  91         if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen))) {
  92             DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
  93             goto err;
  94         }
  95
  96     } else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF)) {
  97         if (!(dsa = DSA_new())) {
  98             DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
  99             goto err;
 100         }
 101     } else {
 102         DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
 103         goto err;
 104     }
 105
 106     if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, pklen))) {
 107         DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
 108         goto err;
 109     }
 110
 111     if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) {
 112         DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
 113         goto err;
 114     }
 115
 116     ASN1_INTEGER_free(public_key);
 117     EVP_PKEY_assign_DSA(pkey, dsa);
 118     return 1;
 119
 120  err:
 121     if (public_key)
 122         ASN1_INTEGER_free(public_key);
 123     if (dsa)
 124         DSA_free(dsa);
 125     return 0;
 126
 127 }
 128
 129 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
 130 {
 131     DSA *dsa;
 132     int ptype;
 133     unsigned char *penc = NULL;
 134     int penclen;
 135     ASN1_STRING *str = NULL;
 136
 137     dsa = pkey->pkey.dsa;
 138     if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
 139         str = ASN1_STRING_new();
 140         if (!str) {
 141             DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 142             goto err;
 143         }
 144         str->length = i2d_DSAparams(dsa, &str->data);
 145         if (str->length <= 0) {
 146             DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 147             goto err;
 148         }
 149         ptype = V_ASN1_SEQUENCE;
 150     } else
 151         ptype = V_ASN1_UNDEF;
 152
 153     dsa->write_params = 0;
 154
 155     penclen = i2d_DSAPublicKey(dsa, &penc);
 156
 157     if (penclen <= 0) {
 158         DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 159         goto err;
 160     }
 161
 162     if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
 163                                ptype, str, penc, penclen))
 164         return 1;
 165
 166  err:
 167     if (penc)
 168         OPENSSL_free(penc);
 169     if (str)
 170         ASN1_STRING_free(str);
 171
 172     return 0;
 173 }
 174
 175 /*
 176  * In PKCS#8 DSA: you just get a private key integer and parameters in the
 177  * AlgorithmIdentifier the pubkey must be recalculated.
 178  */
 179
 180 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
 181 {
 182     const unsigned char *p, *pm;
 183     int pklen, pmlen;
 184     int ptype;
 185     void *pval;
 186     ASN1_STRING *pstr;
 187     X509_ALGOR *palg;
 188     ASN1_INTEGER *privkey = NULL;
 189     BN_CTX *ctx = NULL;
 190
 191     STACK_OF(ASN1_TYPE) *ndsa = NULL;
 192     DSA *dsa = NULL;
 193
 194     if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
 195         return 0;
 196     X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 197
 198     /* Check for broken DSA PKCS#8, UGH! */
 199     if (*p == (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) {
 200         ASN1_TYPE *t1, *t2;
 201         if (!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)))
 202             goto decerr;
 203         if (sk_ASN1_TYPE_num(ndsa) != 2)
 204             goto decerr;
 205         /*-
 206          * Handle Two broken types:
 207          * SEQUENCE {parameters, priv_key}
 208          * SEQUENCE {pub_key, priv_key}
 209          */
 210
 211         t1 = sk_ASN1_TYPE_value(ndsa, 0);
 212         t2 = sk_ASN1_TYPE_value(ndsa, 1);
 213         if (t1->type == V_ASN1_SEQUENCE) {
 214             p8->broken = PKCS8_EMBEDDED_PARAM;
 215             pval = t1->value.ptr;
 216         } else if (ptype == V_ASN1_SEQUENCE)
 217             p8->broken = PKCS8_NS_DB;
 218         else
 219             goto decerr;
 220
 221         if (t2->type != V_ASN1_INTEGER)
 222             goto decerr;
 223
 224         privkey = t2->value.integer;
 225     } else {
 226         const unsigned char *q = p;
 227         if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)))
 228             goto decerr;
 229         if (privkey->type == V_ASN1_NEG_INTEGER) {
 230             p8->broken = PKCS8_NEG_PRIVKEY;
 231             ASN1_STRING_clear_free(privkey);
 232             if (!(privkey = d2i_ASN1_UINTEGER(NULL, &q, pklen)))
 233                 goto decerr;
 234         }
 235         if (ptype != V_ASN1_SEQUENCE)
 236             goto decerr;
 237     }
 238
 239     pstr = pval;
 240     pm = pstr->data;
 241     pmlen = pstr->length;
 242     if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
 243         goto decerr;
 244     /* We have parameters now set private key */
 245     if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) {
 246         DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
 247         goto dsaerr;
 248     }
 249     /* Calculate public key */
 250     if (!(dsa->pub_key = BN_new())) {
 251         DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 252         goto dsaerr;
 253     }
 254     if (!(ctx = BN_CTX_new())) {
 255         DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 256         goto dsaerr;
 257     }
 258
 259     if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
 260         DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
 261         goto dsaerr;
 262     }
 263
 264     EVP_PKEY_assign_DSA(pkey, dsa);
 265     BN_CTX_free(ctx);
 266     if (ndsa)
 267         sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 268     else
 269         ASN1_STRING_clear_free(privkey);
 270
 271     return 1;
 272
 273  decerr:
 274     DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
 275  dsaerr:
 276     BN_CTX_free(ctx);
 277     if (privkey)
 278         ASN1_STRING_clear_free(privkey);
 279     sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 280     DSA_free(dsa);
 281     return 0;
 282 }
 283
 284 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 285 {
 286     ASN1_STRING *params = NULL;
 287     ASN1_INTEGER *prkey = NULL;
 288     unsigned char *dp = NULL;
 289     int dplen;
 290
 291     if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key) {
 292         DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
 293         goto err;
 294     }
 295
 296     params = ASN1_STRING_new();
 297
 298     if (!params) {
 299         DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 300         goto err;
 301     }
 302
 303     params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
 304     if (params->length <= 0) {
 305         DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 306         goto err;
 307     }
 308     params->type = V_ASN1_SEQUENCE;
 309
 310     /* Get private key into integer */
 311     prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
 312
 313     if (!prkey) {
 314         DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
 315         goto err;
 316     }
 317
 318     dplen = i2d_ASN1_INTEGER(prkey, &dp);
 319
 320     ASN1_STRING_clear_free(prkey);
 321     prkey = NULL;
 322
 323     if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
 324                          V_ASN1_SEQUENCE, params, dp, dplen))
 325         goto err;
 326
 327     return 1;
 328
 329  err:
 330     if (dp != NULL)
 331         OPENSSL_free(dp);
 332     if (params != NULL)
 333         ASN1_STRING_free(params);
 334     if (prkey != NULL)
 335         ASN1_STRING_clear_free(prkey);
 336     return 0;
 337 }
 338
 339 static int int_dsa_size(const EVP_PKEY *pkey)
 340 {
 341     return (DSA_size(pkey->pkey.dsa));
 342 }
 343
 344 static int dsa_bits(const EVP_PKEY *pkey)
 345 {
 346     return BN_num_bits(pkey->pkey.dsa->p);
 347 }
 348
 349 static int dsa_missing_parameters(const EVP_PKEY *pkey)
 350 {
 351     DSA *dsa;
 352     dsa = pkey->pkey.dsa;
 353     if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
 354         return 1;
 355     return 0;
 356 }
 357
 358 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 359 {
 360     BIGNUM *a;
 361
 362     if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
 363         return 0;
 364     if (to->pkey.dsa->p != NULL)
 365         BN_free(to->pkey.dsa->p);
 366     to->pkey.dsa->p = a;
 367
 368     if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
 369         return 0;
 370     if (to->pkey.dsa->q != NULL)
 371         BN_free(to->pkey.dsa->q);
 372     to->pkey.dsa->q = a;
 373
 374     if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
 375         return 0;
 376     if (to->pkey.dsa->g != NULL)
 377         BN_free(to->pkey.dsa->g);
 378     to->pkey.dsa->g = a;
 379     return 1;
 380 }
 381
 382 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 383 {
 384     if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
 385         BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
 386         BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
 387         return 0;
 388     else
 389         return 1;
 390 }
 391
 392 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 393 {
 394     if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
 395         return 0;
 396     else
 397         return 1;
 398 }
 399
 400 static void int_dsa_free(EVP_PKEY *pkey)
 401 {
 402     DSA_free(pkey->pkey.dsa);
 403 }
 404
 405 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
 406 {
 407     size_t i;
 408     if (!b)
 409         return;
 410     if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
 411         *pbuflen = i;
 412 }
 413
 414 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
 415 {
 416     unsigned char *m = NULL;
 417     int ret = 0;
 418     size_t buf_len = 0;
 419     const char *ktype = NULL;
 420
 421     const BIGNUM *priv_key, *pub_key;
 422
 423     if (ptype == 2)
 424         priv_key = x->priv_key;
 425     else
 426         priv_key = NULL;
 427
 428     if (ptype > 0)
 429         pub_key = x->pub_key;
 430     else
 431         pub_key = NULL;
 432
 433     if (ptype == 2)
 434         ktype = "Private-Key";
 435     else if (ptype == 1)
 436         ktype = "Public-Key";
 437     else
 438         ktype = "DSA-Parameters";
 439
 440     update_buflen(x->p, &buf_len);
 441     update_buflen(x->q, &buf_len);
 442     update_buflen(x->g, &buf_len);
 443     update_buflen(priv_key, &buf_len);
 444     update_buflen(pub_key, &buf_len);
 445
 446     m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
 447     if (m == NULL) {
 448         DSAerr(DSA_F_DO_DSA_PRINT, ERR_R_MALLOC_FAILURE);
 449         goto err;
 450     }
 451
 452     if (priv_key) {
 453         if (!BIO_indent(bp, off, 128))
 454             goto err;
 455         if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
 456             <= 0)
 457             goto err;
 458     }
 459
 460     if (!ASN1_bn_print(bp, "priv:", priv_key, m, off))
 461         goto err;
 462     if (!ASN1_bn_print(bp, "pub: ", pub_key, m, off))
 463         goto err;
 464     if (!ASN1_bn_print(bp, "P:   ", x->p, m, off))
 465         goto err;
 466     if (!ASN1_bn_print(bp, "Q:   ", x->q, m, off))
 467         goto err;
 468     if (!ASN1_bn_print(bp, "G:   ", x->g, m, off))
 469         goto err;
 470     ret = 1;
 471  err:
 472     if (m != NULL)
 473         OPENSSL_free(m);
 474     return (ret);
 475 }
 476
 477 static int dsa_param_decode(EVP_PKEY *pkey,
 478                             const unsigned char **pder, int derlen)
 479 {
 480     DSA *dsa;
 481     if (!(dsa = d2i_DSAparams(NULL, pder, derlen))) {
 482         DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
 483         return 0;
 484     }
 485     EVP_PKEY_assign_DSA(pkey, dsa);
 486     return 1;
 487 }
 488
 489 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 490 {
 491     return i2d_DSAparams(pkey->pkey.dsa, pder);
 492 }
 493
 494 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 495                            ASN1_PCTX *ctx)
 496 {
 497     return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
 498 }
 499
 500 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 501                          ASN1_PCTX *ctx)
 502 {
 503     return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
 504 }
 505
 506 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 507                           ASN1_PCTX *ctx)
 508 {
 509     return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
 510 }
 511
 512 static int old_dsa_priv_decode(EVP_PKEY *pkey,
 513                                const unsigned char **pder, int derlen)
 514 {
 515     DSA *dsa;
 516     if (!(dsa = d2i_DSAPrivateKey(NULL, pder, derlen))) {
 517         DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
 518         return 0;
 519     }
 520     EVP_PKEY_assign_DSA(pkey, dsa);
 521     return 1;
 522 }
 523
 524 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 525 {
 526     return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
 527 }
 528
 529 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
 530                          const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
 531 {
 532     DSA_SIG *dsa_sig;
 533     const unsigned char *p;
 534     if (!sig) {
 535         if (BIO_puts(bp, "\n") <= 0)
 536             return 0;
 537         else
 538             return 1;
 539     }
 540     p = sig->data;
 541     dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
 542     if (dsa_sig) {
 543         int rv = 0;
 544         size_t buf_len = 0;
 545         unsigned char *m = NULL;
 546         update_buflen(dsa_sig->r, &buf_len);
 547         update_buflen(dsa_sig->s, &buf_len);
 548         m = OPENSSL_malloc(buf_len + 10);
 549         if (m == NULL) {
 550             DSAerr(DSA_F_DSA_SIG_PRINT, ERR_R_MALLOC_FAILURE);
 551             goto err;
 552         }
 553
 554         if (BIO_write(bp, "\n", 1) != 1)
 555             goto err;
 556
 557         if (!ASN1_bn_print(bp, "r:   ", dsa_sig->r, m, indent))
 558             goto err;
 559         if (!ASN1_bn_print(bp, "s:   ", dsa_sig->s, m, indent))
 560             goto err;
 561         rv = 1;
 562  err:
 563         if (m)
 564             OPENSSL_free(m);
 565         DSA_SIG_free(dsa_sig);
 566         return rv;
 567     }
 568     return X509_signature_dump(bp, sig, indent);
 569 }
 570
 571 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 572 {
 573     switch (op) {
 574     case ASN1_PKEY_CTRL_PKCS7_SIGN:
 575         if (arg1 == 0) {
 576             int snid, hnid;
 577             X509_ALGOR *alg1, *alg2;
 578             PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
 579             if (alg1 == NULL || alg1->algorithm == NULL)
 580                 return -1;
 581             hnid = OBJ_obj2nid(alg1->algorithm);
 582             if (hnid == NID_undef)
 583                 return -1;
 584             if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 585                 return -1;
 586             X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 587         }
 588         return 1;
 589 #ifndef OPENSSL_NO_CMS
 590     case ASN1_PKEY_CTRL_CMS_SIGN:
 591         if (arg1 == 0) {
 592             int snid, hnid;
 593             X509_ALGOR *alg1, *alg2;
 594             CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
 595             if (alg1 == NULL || alg1->algorithm == NULL)
 596                 return -1;
 597             hnid = OBJ_obj2nid(alg1->algorithm);
 598             if (hnid == NID_undef)
 599                 return -1;
 600             if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 601                 return -1;
 602             X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 603         }
 604         return 1;
 605
 606     case ASN1_PKEY_CTRL_CMS_RI_TYPE:
 607         *(int *)arg2 = CMS_RECIPINFO_NONE;
 608         return 1;
 609 #endif
 610
 611     case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 612         *(int *)arg2 = NID_sha256;
 613         return 2;
 614
 615     default:
 616         return -2;
 617
 618     }
 619
 620 }
 621
 622 /* NB these are sorted in pkey_id order, lowest first */
 623
 624 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = {
 625
 626     {
 627      EVP_PKEY_DSA2,
 628      EVP_PKEY_DSA,
 629      ASN1_PKEY_ALIAS},
 630
 631     {
 632      EVP_PKEY_DSA1,
 633      EVP_PKEY_DSA,
 634      ASN1_PKEY_ALIAS},
 635
 636     {
 637      EVP_PKEY_DSA4,
 638      EVP_PKEY_DSA,
 639      ASN1_PKEY_ALIAS},
 640
 641     {
 642      EVP_PKEY_DSA3,
 643      EVP_PKEY_DSA,
 644      ASN1_PKEY_ALIAS},
 645
 646     {
 647      EVP_PKEY_DSA,
 648      EVP_PKEY_DSA,
 649      0,
 650
 651      "DSA",
 652      "OpenSSL DSA method",
 653
 654      dsa_pub_decode,
 655      dsa_pub_encode,
 656      dsa_pub_cmp,
 657      dsa_pub_print,
 658
 659      dsa_priv_decode,
 660      dsa_priv_encode,
 661      dsa_priv_print,
 662
 663      int_dsa_size,
 664      dsa_bits,
 665
 666      dsa_param_decode,
 667      dsa_param_encode,
 668      dsa_missing_parameters,
 669      dsa_copy_parameters,
 670      dsa_cmp_parameters,
 671      dsa_param_print,
 672      dsa_sig_print,
 673
 674      int_dsa_free,
 675      dsa_pkey_ctrl,
 676      old_dsa_priv_decode,
 677      old_dsa_priv_encode}
 678 };