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 "internal/asn1_int.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     ASN1_INTEGER_free(public_key);
 122     DSA_free(dsa);
 123     return 0;
 124
 125 }
 126
 127 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
 128 {
 129     DSA *dsa;
 130     int ptype;
 131     unsigned char *penc = NULL;
 132     int penclen;
 133     ASN1_STRING *str = NULL;
 134     ASN1_INTEGER *pubint = NULL;
 135
 136     dsa = pkey->pkey.dsa;
 137     if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
 138         str = ASN1_STRING_new();
 139         if (!str) {
 140             DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 141             goto err;
 142         }
 143         str->length = i2d_DSAparams(dsa, &str->data);
 144         if (str->length <= 0) {
 145             DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 146             goto err;
 147         }
 148         ptype = V_ASN1_SEQUENCE;
 149     } else
 150         ptype = V_ASN1_UNDEF;
 151
 152     pubint = BN_to_ASN1_INTEGER(dsa->pub_key, NULL);
 153
 154     if (pubint == NULL) {
 155         DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 156         goto err;
 157     }
 158
 159     penclen = i2d_ASN1_INTEGER(pubint, &penc);
 160     ASN1_INTEGER_free(pubint);
 161
 162     if (penclen <= 0) {
 163         DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 164         goto err;
 165     }
 166
 167     if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
 168                                ptype, str, penc, penclen))
 169         return 1;
 170
 171  err:
 172     if (penc)
 173         OPENSSL_free(penc);
 174     ASN1_STRING_free(str);
 175
 176     return 0;
 177 }
 178
 179 /*
 180  * In PKCS#8 DSA: you just get a private key integer and parameters in the
 181  * AlgorithmIdentifier the pubkey must be recalculated.
 182  */
 183
 184 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
 185 {
 186     const unsigned char *p, *pm;
 187     int pklen, pmlen;
 188     int ptype;
 189     void *pval;
 190     ASN1_STRING *pstr;
 191     X509_ALGOR *palg;
 192     ASN1_INTEGER *privkey = NULL;
 193     BN_CTX *ctx = NULL;
 194
 195     STACK_OF(ASN1_TYPE) *ndsa = NULL;
 196     DSA *dsa = NULL;
 197
 198     if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
 199         return 0;
 200     X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 201
 202     /* Check for broken DSA PKCS#8, UGH! */
 203     if (*p == (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) {
 204         ASN1_TYPE *t1, *t2;
 205         if (!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)))
 206             goto decerr;
 207         if (sk_ASN1_TYPE_num(ndsa) != 2)
 208             goto decerr;
 209         /*-
 210          * Handle Two broken types:
 211          * SEQUENCE {parameters, priv_key}
 212          * SEQUENCE {pub_key, priv_key}
 213          */
 214
 215         t1 = sk_ASN1_TYPE_value(ndsa, 0);
 216         t2 = sk_ASN1_TYPE_value(ndsa, 1);
 217         if (t1->type == V_ASN1_SEQUENCE) {
 218             p8->broken = PKCS8_EMBEDDED_PARAM;
 219             pval = t1->value.ptr;
 220         } else if (ptype == V_ASN1_SEQUENCE)
 221             p8->broken = PKCS8_NS_DB;
 222         else
 223             goto decerr;
 224
 225         if (t2->type != V_ASN1_INTEGER)
 226             goto decerr;
 227
 228         privkey = t2->value.integer;
 229     } else {
 230         const unsigned char *q = p;
 231         if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)))
 232             goto decerr;
 233         if (privkey->type == V_ASN1_NEG_INTEGER) {
 234             p8->broken = PKCS8_NEG_PRIVKEY;
 235             ASN1_STRING_clear_free(privkey);
 236             if (!(privkey = d2i_ASN1_UINTEGER(NULL, &q, pklen)))
 237                 goto decerr;
 238         }
 239         if (ptype != V_ASN1_SEQUENCE)
 240             goto decerr;
 241     }
 242
 243     pstr = pval;
 244     pm = pstr->data;
 245     pmlen = pstr->length;
 246     if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
 247         goto decerr;
 248     /* We have parameters now set private key */
 249     if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) {
 250         DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
 251         goto dsaerr;
 252     }
 253     /* Calculate public key */
 254     if (!(dsa->pub_key = BN_new())) {
 255         DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 256         goto dsaerr;
 257     }
 258     if (!(ctx = BN_CTX_new())) {
 259         DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 260         goto dsaerr;
 261     }
 262
 263     if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
 264         DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
 265         goto dsaerr;
 266     }
 267
 268     EVP_PKEY_assign_DSA(pkey, dsa);
 269     BN_CTX_free(ctx);
 270     if (ndsa)
 271         sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 272     else
 273         ASN1_STRING_clear_free(privkey);
 274
 275     return 1;
 276
 277  decerr:
 278     DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
 279  dsaerr:
 280     BN_CTX_free(ctx);
 281     ASN1_STRING_clear_free(privkey);
 282     sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 283     DSA_free(dsa);
 284     return 0;
 285 }
 286
 287 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 288 {
 289     ASN1_STRING *params = NULL;
 290     ASN1_INTEGER *prkey = NULL;
 291     unsigned char *dp = NULL;
 292     int dplen;
 293
 294     if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key) {
 295         DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
 296         goto err;
 297     }
 298
 299     params = ASN1_STRING_new();
 300
 301     if (!params) {
 302         DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 303         goto err;
 304     }
 305
 306     params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
 307     if (params->length <= 0) {
 308         DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 309         goto err;
 310     }
 311     params->type = V_ASN1_SEQUENCE;
 312
 313     /* Get private key into integer */
 314     prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
 315
 316     if (!prkey) {
 317         DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
 318         goto err;
 319     }
 320
 321     dplen = i2d_ASN1_INTEGER(prkey, &dp);
 322
 323     ASN1_STRING_clear_free(prkey);
 324
 325     if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
 326                          V_ASN1_SEQUENCE, params, dp, dplen))
 327         goto err;
 328
 329     return 1;
 330
 331  err:
 332     if (dp != NULL)
 333         OPENSSL_free(dp);
 334     ASN1_STRING_free(params);
 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_security_bits(const EVP_PKEY *pkey)
 350 {
 351     return DSA_security_bits(pkey->pkey.dsa);
 352 }
 353
 354 static int dsa_missing_parameters(const EVP_PKEY *pkey)
 355 {
 356     DSA *dsa;
 357     dsa = pkey->pkey.dsa;
 358     if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
 359         return 1;
 360     return 0;
 361 }
 362
 363 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 364 {
 365     BIGNUM *a;
 366
 367     if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
 368         return 0;
 369     if (to->pkey.dsa->p != NULL)
 370         BN_free(to->pkey.dsa->p);
 371     to->pkey.dsa->p = a;
 372
 373     if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
 374         return 0;
 375     if (to->pkey.dsa->q != NULL)
 376         BN_free(to->pkey.dsa->q);
 377     to->pkey.dsa->q = a;
 378
 379     if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
 380         return 0;
 381     if (to->pkey.dsa->g != NULL)
 382         BN_free(to->pkey.dsa->g);
 383     to->pkey.dsa->g = a;
 384     return 1;
 385 }
 386
 387 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 388 {
 389     if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
 390         BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
 391         BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
 392         return 0;
 393     else
 394         return 1;
 395 }
 396
 397 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 398 {
 399     if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
 400         return 0;
 401     else
 402         return 1;
 403 }
 404
 405 static void int_dsa_free(EVP_PKEY *pkey)
 406 {
 407     DSA_free(pkey->pkey.dsa);
 408 }
 409
 410 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
 411 {
 412     size_t i;
 413     if (!b)
 414         return;
 415     if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
 416         *pbuflen = i;
 417 }
 418
 419 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
 420 {
 421     unsigned char *m = NULL;
 422     int ret = 0;
 423     size_t buf_len = 0;
 424     const char *ktype = NULL;
 425
 426     const BIGNUM *priv_key, *pub_key;
 427
 428     if (ptype == 2)
 429         priv_key = x->priv_key;
 430     else
 431         priv_key = NULL;
 432
 433     if (ptype > 0)
 434         pub_key = x->pub_key;
 435     else
 436         pub_key = NULL;
 437
 438     if (ptype == 2)
 439         ktype = "Private-Key";
 440     else if (ptype == 1)
 441         ktype = "Public-Key";
 442     else
 443         ktype = "DSA-Parameters";
 444
 445     update_buflen(x->p, &buf_len);
 446     update_buflen(x->q, &buf_len);
 447     update_buflen(x->g, &buf_len);
 448     update_buflen(priv_key, &buf_len);
 449     update_buflen(pub_key, &buf_len);
 450
 451     m = OPENSSL_malloc(buf_len + 10);
 452     if (m == NULL) {
 453         DSAerr(DSA_F_DO_DSA_PRINT, ERR_R_MALLOC_FAILURE);
 454         goto err;
 455     }
 456
 457     if (priv_key) {
 458         if (!BIO_indent(bp, off, 128))
 459             goto err;
 460         if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
 461             <= 0)
 462             goto err;
 463     }
 464
 465     if (!ASN1_bn_print(bp, "priv:", priv_key, m, off))
 466         goto err;
 467     if (!ASN1_bn_print(bp, "pub: ", pub_key, m, off))
 468         goto err;
 469     if (!ASN1_bn_print(bp, "P:   ", x->p, m, off))
 470         goto err;
 471     if (!ASN1_bn_print(bp, "Q:   ", x->q, m, off))
 472         goto err;
 473     if (!ASN1_bn_print(bp, "G:   ", x->g, m, off))
 474         goto err;
 475     ret = 1;
 476  err:
 477     if (m != NULL)
 478         OPENSSL_free(m);
 479     return (ret);
 480 }
 481
 482 static int dsa_param_decode(EVP_PKEY *pkey,
 483                             const unsigned char **pder, int derlen)
 484 {
 485     DSA *dsa;
 486     if (!(dsa = d2i_DSAparams(NULL, pder, derlen))) {
 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 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 512                           ASN1_PCTX *ctx)
 513 {
 514     return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
 515 }
 516
 517 static int old_dsa_priv_decode(EVP_PKEY *pkey,
 518                                const unsigned char **pder, int derlen)
 519 {
 520     DSA *dsa;
 521     if (!(dsa = d2i_DSAPrivateKey(NULL, pder, derlen))) {
 522         DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
 523         return 0;
 524     }
 525     EVP_PKEY_assign_DSA(pkey, dsa);
 526     return 1;
 527 }
 528
 529 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 530 {
 531     return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
 532 }
 533
 534 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
 535                          const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
 536 {
 537     DSA_SIG *dsa_sig;
 538     const unsigned char *p;
 539     if (!sig) {
 540         if (BIO_puts(bp, "\n") <= 0)
 541             return 0;
 542         else
 543             return 1;
 544     }
 545     p = sig->data;
 546     dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
 547     if (dsa_sig) {
 548         int rv = 0;
 549         size_t buf_len = 0;
 550         unsigned char *m = NULL;
 551         update_buflen(dsa_sig->r, &buf_len);
 552         update_buflen(dsa_sig->s, &buf_len);
 553         m = OPENSSL_malloc(buf_len + 10);
 554         if (m == NULL) {
 555             DSAerr(DSA_F_DSA_SIG_PRINT, ERR_R_MALLOC_FAILURE);
 556             goto err;
 557         }
 558
 559         if (BIO_write(bp, "\n", 1) != 1)
 560             goto err;
 561
 562         if (!ASN1_bn_print(bp, "r:   ", dsa_sig->r, m, indent))
 563             goto err;
 564         if (!ASN1_bn_print(bp, "s:   ", dsa_sig->s, m, indent))
 565             goto err;
 566         rv = 1;
 567  err:
 568         if (m)
 569             OPENSSL_free(m);
 570         DSA_SIG_free(dsa_sig);
 571         return rv;
 572     }
 573     return X509_signature_dump(bp, sig, indent);
 574 }
 575
 576 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 577 {
 578     switch (op) {
 579     case ASN1_PKEY_CTRL_PKCS7_SIGN:
 580         if (arg1 == 0) {
 581             int snid, hnid;
 582             X509_ALGOR *alg1, *alg2;
 583             PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
 584             if (alg1 == NULL || alg1->algorithm == NULL)
 585                 return -1;
 586             hnid = OBJ_obj2nid(alg1->algorithm);
 587             if (hnid == NID_undef)
 588                 return -1;
 589             if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 590                 return -1;
 591             X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 592         }
 593         return 1;
 594 #ifndef OPENSSL_NO_CMS
 595     case ASN1_PKEY_CTRL_CMS_SIGN:
 596         if (arg1 == 0) {
 597             int snid, hnid;
 598             X509_ALGOR *alg1, *alg2;
 599             CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
 600             if (alg1 == NULL || alg1->algorithm == NULL)
 601                 return -1;
 602             hnid = OBJ_obj2nid(alg1->algorithm);
 603             if (hnid == NID_undef)
 604                 return -1;
 605             if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 606                 return -1;
 607             X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 608         }
 609         return 1;
 610
 611     case ASN1_PKEY_CTRL_CMS_RI_TYPE:
 612         *(int *)arg2 = CMS_RECIPINFO_NONE;
 613         return 1;
 614 #endif
 615
 616     case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 617         *(int *)arg2 = NID_sha256;
 618         return 2;
 619
 620     default:
 621         return -2;
 622
 623     }
 624
 625 }
 626
 627 /* NB these are sorted in pkey_id order, lowest first */
 628
 629 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = {
 630
 631     {
 632      EVP_PKEY_DSA2,
 633      EVP_PKEY_DSA,
 634      ASN1_PKEY_ALIAS},
 635
 636     {
 637      EVP_PKEY_DSA1,
 638      EVP_PKEY_DSA,
 639      ASN1_PKEY_ALIAS},
 640
 641     {
 642      EVP_PKEY_DSA4,
 643      EVP_PKEY_DSA,
 644      ASN1_PKEY_ALIAS},
 645
 646     {
 647      EVP_PKEY_DSA3,
 648      EVP_PKEY_DSA,
 649      ASN1_PKEY_ALIAS},
 650
 651     {
 652      EVP_PKEY_DSA,
 653      EVP_PKEY_DSA,
 654      0,
 655
 656      "DSA",
 657      "OpenSSL DSA method",
 658
 659      dsa_pub_decode,
 660      dsa_pub_encode,
 661      dsa_pub_cmp,
 662      dsa_pub_print,
 663
 664      dsa_priv_decode,
 665      dsa_priv_encode,
 666      dsa_priv_print,
 667
 668      int_dsa_size,
 669      dsa_bits,
 670      dsa_security_bits,
 671
 672      dsa_param_decode,
 673      dsa_param_encode,
 674      dsa_missing_parameters,
 675      dsa_copy_parameters,
 676      dsa_cmp_parameters,
 677      dsa_param_print,
 678      dsa_sig_print,
 679
 680      int_dsa_free,
 681      dsa_pkey_ctrl,
 682      old_dsa_priv_decode,
 683      old_dsa_priv_encode}
 684 };