crypto/dsa/dsa_ameth.c

   1 /*
   2  * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <openssl/x509.h>
  12 #include <openssl/asn1.h>
  13 #include <openssl/bn.h>
  14 #include <openssl/cms.h>
  15 #include <openssl/core_names.h>
  16 #include "internal/cryptlib.h"
  17 #include "crypto/asn1.h"
  18 #include "crypto/evp.h"
  19 #include "internal/param_build.h"
  20 #include "dsa_local.h"
  21
  22 static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
  23 {
  24     const unsigned char *p, *pm;
  25     int pklen, pmlen;
  26     int ptype;
  27     const void *pval;
  28     const ASN1_STRING *pstr;
  29     X509_ALGOR *palg;
  30     ASN1_INTEGER *public_key = NULL;
  31
  32     DSA *dsa = NULL;
  33
  34     if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
  35         return 0;
  36     X509_ALGOR_get0(NULL, &ptype, &pval, palg);
  37
  38     if (ptype == V_ASN1_SEQUENCE) {
  39         pstr = pval;
  40         pm = pstr->data;
  41         pmlen = pstr->length;
  42
  43         if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL) {
  44             DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
  45             goto err;
  46         }
  47
  48     } else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF)) {
  49         if ((dsa = DSA_new()) == NULL) {
  50             DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
  51             goto err;
  52         }
  53     } else {
  54         DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
  55         goto err;
  56     }
  57
  58     if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
  59         DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
  60         goto err;
  61     }
  62
  63     if ((dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
  64         DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
  65         goto err;
  66     }
  67
  68     dsa->dirty_cnt++;
  69     ASN1_INTEGER_free(public_key);
  70     EVP_PKEY_assign_DSA(pkey, dsa);
  71     return 1;
  72
  73  err:
  74     ASN1_INTEGER_free(public_key);
  75     DSA_free(dsa);
  76     return 0;
  77
  78 }
  79
  80 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
  81 {
  82     DSA *dsa;
  83     int ptype;
  84     unsigned char *penc = NULL;
  85     int penclen;
  86     ASN1_STRING *str = NULL;
  87     ASN1_INTEGER *pubint = NULL;
  88     ASN1_OBJECT *aobj;
  89
  90     dsa = pkey->pkey.dsa;
  91     if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
  92         str = ASN1_STRING_new();
  93         if (str == NULL) {
  94             DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
  95             goto err;
  96         }
  97         str->length = i2d_DSAparams(dsa, &str->data);
  98         if (str->length <= 0) {
  99             DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 100             goto err;
 101         }
 102         ptype = V_ASN1_SEQUENCE;
 103     } else
 104         ptype = V_ASN1_UNDEF;
 105
 106     pubint = BN_to_ASN1_INTEGER(dsa->pub_key, NULL);
 107
 108     if (pubint == NULL) {
 109         DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 110         goto err;
 111     }
 112
 113     penclen = i2d_ASN1_INTEGER(pubint, &penc);
 114     ASN1_INTEGER_free(pubint);
 115
 116     if (penclen <= 0) {
 117         DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
 118         goto err;
 119     }
 120
 121     aobj = OBJ_nid2obj(EVP_PKEY_DSA);
 122     if (aobj == NULL)
 123         goto err;
 124
 125     if (X509_PUBKEY_set0_param(pk, aobj, ptype, str, penc, penclen))
 126         return 1;
 127
 128  err:
 129     OPENSSL_free(penc);
 130     ASN1_STRING_free(str);
 131
 132     return 0;
 133 }
 134
 135 /*
 136  * In PKCS#8 DSA: you just get a private key integer and parameters in the
 137  * AlgorithmIdentifier the pubkey must be recalculated.
 138  */
 139
 140 static int dsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
 141 {
 142     const unsigned char *p, *pm;
 143     int pklen, pmlen;
 144     int ptype;
 145     const void *pval;
 146     const ASN1_STRING *pstr;
 147     const X509_ALGOR *palg;
 148     ASN1_INTEGER *privkey = NULL;
 149     BN_CTX *ctx = NULL;
 150
 151     DSA *dsa = NULL;
 152
 153     int ret = 0;
 154
 155     if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
 156         return 0;
 157     X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 158
 159     if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
 160         goto decerr;
 161     if (privkey->type == V_ASN1_NEG_INTEGER || ptype != V_ASN1_SEQUENCE)
 162         goto decerr;
 163
 164     pstr = pval;
 165     pm = pstr->data;
 166     pmlen = pstr->length;
 167     if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL)
 168         goto decerr;
 169     /* We have parameters now set private key */
 170     if ((dsa->priv_key = BN_secure_new()) == NULL
 171         || !ASN1_INTEGER_to_BN(privkey, dsa->priv_key)) {
 172         DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
 173         goto dsaerr;
 174     }
 175     /* Calculate public key */
 176     if ((dsa->pub_key = BN_new()) == NULL) {
 177         DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 178         goto dsaerr;
 179     }
 180     if ((ctx = BN_CTX_new()) == NULL) {
 181         DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
 182         goto dsaerr;
 183     }
 184
 185     BN_set_flags(dsa->priv_key, BN_FLG_CONSTTIME);
 186     if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
 187         DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
 188         goto dsaerr;
 189     }
 190
 191     dsa->dirty_cnt++;
 192     EVP_PKEY_assign_DSA(pkey, dsa);
 193
 194     ret = 1;
 195     goto done;
 196
 197  decerr:
 198     DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_DECODE_ERROR);
 199  dsaerr:
 200     DSA_free(dsa);
 201  done:
 202     BN_CTX_free(ctx);
 203     ASN1_STRING_clear_free(privkey);
 204     return ret;
 205 }
 206
 207 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 208 {
 209     ASN1_STRING *params = NULL;
 210     ASN1_INTEGER *prkey = NULL;
 211     unsigned char *dp = NULL;
 212     int dplen;
 213
 214     if (pkey->pkey.dsa  == NULL|| pkey->pkey.dsa->priv_key == NULL) {
 215         DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
 216         goto err;
 217     }
 218
 219     params = ASN1_STRING_new();
 220
 221     if (params == NULL) {
 222         DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 223         goto err;
 224     }
 225
 226     params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
 227     if (params->length <= 0) {
 228         DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 229         goto err;
 230     }
 231     params->type = V_ASN1_SEQUENCE;
 232
 233     /* Get private key into integer */
 234     prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
 235
 236     if (prkey == NULL) {
 237         DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
 238         goto err;
 239     }
 240
 241     dplen = i2d_ASN1_INTEGER(prkey, &dp);
 242
 243     ASN1_STRING_clear_free(prkey);
 244     prkey = NULL;
 245
 246     if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
 247                          V_ASN1_SEQUENCE, params, dp, dplen))
 248         goto err;
 249
 250     return 1;
 251
 252  err:
 253     OPENSSL_free(dp);
 254     ASN1_STRING_free(params);
 255     ASN1_STRING_clear_free(prkey);
 256     return 0;
 257 }
 258
 259 static int int_dsa_size(const EVP_PKEY *pkey)
 260 {
 261     return DSA_size(pkey->pkey.dsa);
 262 }
 263
 264 static int dsa_bits(const EVP_PKEY *pkey)
 265 {
 266     return DSA_bits(pkey->pkey.dsa);
 267 }
 268
 269 static int dsa_security_bits(const EVP_PKEY *pkey)
 270 {
 271     return DSA_security_bits(pkey->pkey.dsa);
 272 }
 273
 274 static int dsa_missing_parameters(const EVP_PKEY *pkey)
 275 {
 276     DSA *dsa;
 277     dsa = pkey->pkey.dsa;
 278     if (dsa == NULL || dsa->p == NULL || dsa->q == NULL || dsa->g == NULL)
 279         return 1;
 280     return 0;
 281 }
 282
 283 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 284 {
 285     BIGNUM *a;
 286
 287     if (to->pkey.dsa == NULL) {
 288         to->pkey.dsa = DSA_new();
 289         if (to->pkey.dsa == NULL)
 290             return 0;
 291     }
 292
 293     if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
 294         return 0;
 295     BN_free(to->pkey.dsa->p);
 296     to->pkey.dsa->p = a;
 297
 298     if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
 299         return 0;
 300     BN_free(to->pkey.dsa->q);
 301     to->pkey.dsa->q = a;
 302
 303     if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
 304         return 0;
 305     BN_free(to->pkey.dsa->g);
 306     to->pkey.dsa->g = a;
 307     to->pkey.dsa->dirty_cnt++;
 308     return 1;
 309 }
 310
 311 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 312 {
 313     if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
 314         BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
 315         BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
 316         return 0;
 317     else
 318         return 1;
 319 }
 320
 321 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 322 {
 323     if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
 324         return 0;
 325     else
 326         return 1;
 327 }
 328
 329 static void int_dsa_free(EVP_PKEY *pkey)
 330 {
 331     DSA_free(pkey->pkey.dsa);
 332 }
 333
 334 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
 335 {
 336     int ret = 0;
 337     const char *ktype = NULL;
 338     const BIGNUM *priv_key, *pub_key;
 339     int mod_len = 0;
 340
 341     if (x->p != NULL)
 342         mod_len = BN_num_bits(x->p);
 343
 344     if (ptype == 2)
 345         priv_key = x->priv_key;
 346     else
 347         priv_key = NULL;
 348
 349     if (ptype > 0)
 350         pub_key = x->pub_key;
 351     else
 352         pub_key = NULL;
 353
 354     if (ptype == 2)
 355         ktype = "Private-Key";
 356     else if (ptype == 1)
 357         ktype = "Public-Key";
 358     else
 359         ktype = "DSA-Parameters";
 360
 361     if (priv_key) {
 362         if (!BIO_indent(bp, off, 128))
 363             goto err;
 364         if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
 365             <= 0)
 366             goto err;
 367     } else {
 368         if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
 369             goto err;
 370     }
 371
 372     if (!ASN1_bn_print(bp, "priv:", priv_key, NULL, off))
 373         goto err;
 374     if (!ASN1_bn_print(bp, "pub: ", pub_key, NULL, off))
 375         goto err;
 376     if (!ASN1_bn_print(bp, "P:   ", x->p, NULL, off))
 377         goto err;
 378     if (!ASN1_bn_print(bp, "Q:   ", x->q, NULL, off))
 379         goto err;
 380     if (!ASN1_bn_print(bp, "G:   ", x->g, NULL, off))
 381         goto err;
 382     ret = 1;
 383  err:
 384     return ret;
 385 }
 386
 387 static int dsa_param_decode(EVP_PKEY *pkey,
 388                             const unsigned char **pder, int derlen)
 389 {
 390     DSA *dsa;
 391
 392     if ((dsa = d2i_DSAparams(NULL, pder, derlen)) == NULL) {
 393         DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
 394         return 0;
 395     }
 396     dsa->dirty_cnt++;
 397     EVP_PKEY_assign_DSA(pkey, dsa);
 398     return 1;
 399 }
 400
 401 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 402 {
 403     return i2d_DSAparams(pkey->pkey.dsa, pder);
 404 }
 405
 406 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 407                            ASN1_PCTX *ctx)
 408 {
 409     return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
 410 }
 411
 412 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 413                          ASN1_PCTX *ctx)
 414 {
 415     return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
 416 }
 417
 418 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 419                           ASN1_PCTX *ctx)
 420 {
 421     return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
 422 }
 423
 424 static int old_dsa_priv_decode(EVP_PKEY *pkey,
 425                                const unsigned char **pder, int derlen)
 426 {
 427     DSA *dsa;
 428
 429     if ((dsa = d2i_DSAPrivateKey(NULL, pder, derlen)) == NULL) {
 430         DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
 431         return 0;
 432     }
 433     dsa->dirty_cnt++;
 434     EVP_PKEY_assign_DSA(pkey, dsa);
 435     return 1;
 436 }
 437
 438 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 439 {
 440     return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
 441 }
 442
 443 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
 444                          const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
 445 {
 446     DSA_SIG *dsa_sig;
 447     const unsigned char *p;
 448
 449     if (!sig) {
 450         if (BIO_puts(bp, "\n") <= 0)
 451             return 0;
 452         else
 453             return 1;
 454     }
 455     p = sig->data;
 456     dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
 457     if (dsa_sig) {
 458         int rv = 0;
 459         const BIGNUM *r, *s;
 460
 461         DSA_SIG_get0(dsa_sig, &r, &s);
 462
 463         if (BIO_write(bp, "\n", 1) != 1)
 464             goto err;
 465
 466         if (!ASN1_bn_print(bp, "r:   ", r, NULL, indent))
 467             goto err;
 468         if (!ASN1_bn_print(bp, "s:   ", s, NULL, indent))
 469             goto err;
 470         rv = 1;
 471  err:
 472         DSA_SIG_free(dsa_sig);
 473         return rv;
 474     }
 475     if (BIO_puts(bp, "\n") <= 0)
 476         return 0;
 477     return X509_signature_dump(bp, sig, indent);
 478 }
 479
 480 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 481 {
 482     switch (op) {
 483     case ASN1_PKEY_CTRL_PKCS7_SIGN:
 484         if (arg1 == 0) {
 485             int snid, hnid;
 486             X509_ALGOR *alg1, *alg2;
 487             PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
 488             if (alg1 == NULL || alg1->algorithm == NULL)
 489                 return -1;
 490             hnid = OBJ_obj2nid(alg1->algorithm);
 491             if (hnid == NID_undef)
 492                 return -1;
 493             if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 494                 return -1;
 495             X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 496         }
 497         return 1;
 498 #ifndef OPENSSL_NO_CMS
 499     case ASN1_PKEY_CTRL_CMS_SIGN:
 500         if (arg1 == 0) {
 501             int snid, hnid;
 502             X509_ALGOR *alg1, *alg2;
 503             CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
 504             if (alg1 == NULL || alg1->algorithm == NULL)
 505                 return -1;
 506             hnid = OBJ_obj2nid(alg1->algorithm);
 507             if (hnid == NID_undef)
 508                 return -1;
 509             if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 510                 return -1;
 511             X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 512         }
 513         return 1;
 514
 515     case ASN1_PKEY_CTRL_CMS_RI_TYPE:
 516         *(int *)arg2 = CMS_RECIPINFO_NONE;
 517         return 1;
 518 #endif
 519
 520     case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 521         *(int *)arg2 = NID_sha256;
 522         return 1;
 523
 524     default:
 525         return -2;
 526
 527     }
 528
 529 }
 530
 531 static size_t dsa_pkey_dirty_cnt(const EVP_PKEY *pkey)
 532 {
 533     return pkey->pkey.dsa->dirty_cnt;
 534 }
 535
 536 static void *dsa_pkey_export_to(const EVP_PKEY *pk, EVP_KEYMGMT *keymgmt)
 537 {
 538     DSA *dsa = pk->pkey.dsa;
 539     OSSL_PARAM_BLD tmpl;
 540     const BIGNUM *p = DSA_get0_p(dsa), *g = DSA_get0_g(dsa);
 541     const BIGNUM *q = DSA_get0_q(dsa), *pub_key = DSA_get0_pub_key(dsa);
 542     const BIGNUM *priv_key = DSA_get0_priv_key(dsa);
 543     OSSL_PARAM *params;
 544     void *provkey = NULL;
 545
 546     if (p == NULL || q == NULL || g == NULL)
 547         return NULL;
 548
 549     ossl_param_bld_init(&tmpl);
 550     if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_P, p)
 551         || !ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_Q, q)
 552         || !ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_G, g))
 553         return NULL;
 554
 555     /*
 556      * This may be used to pass domain parameters only without any key data -
 557      * so "pub_key" is optional. We can never have a "priv_key" without a
 558      * corresponding "pub_key" though.
 559      */
 560     if (pub_key != NULL) {
 561         if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_DSA_PUB_KEY,
 562                                     pub_key))
 563             return NULL;
 564
 565         if (priv_key != NULL) {
 566             if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_DSA_PRIV_KEY,
 567                                         priv_key))
 568                 return NULL;
 569         }
 570     }
 571
 572     params = ossl_param_bld_to_param(&tmpl);
 573
 574     /* We export, the provider imports */
 575     provkey = evp_keymgmt_importkey(keymgmt, params);
 576
 577     ossl_param_bld_free(params);
 578     return provkey;
 579 }
 580
 581 /* NB these are sorted in pkey_id order, lowest first */
 582
 583 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[5] = {
 584
 585     {
 586      EVP_PKEY_DSA2,
 587      EVP_PKEY_DSA,
 588      ASN1_PKEY_ALIAS},
 589
 590     {
 591      EVP_PKEY_DSA1,
 592      EVP_PKEY_DSA,
 593      ASN1_PKEY_ALIAS},
 594
 595     {
 596      EVP_PKEY_DSA4,
 597      EVP_PKEY_DSA,
 598      ASN1_PKEY_ALIAS},
 599
 600     {
 601      EVP_PKEY_DSA3,
 602      EVP_PKEY_DSA,
 603      ASN1_PKEY_ALIAS},
 604
 605     {
 606      EVP_PKEY_DSA,
 607      EVP_PKEY_DSA,
 608      0,
 609
 610      "DSA",
 611      "OpenSSL DSA method",
 612
 613      dsa_pub_decode,
 614      dsa_pub_encode,
 615      dsa_pub_cmp,
 616      dsa_pub_print,
 617
 618      dsa_priv_decode,
 619      dsa_priv_encode,
 620      dsa_priv_print,
 621
 622      int_dsa_size,
 623      dsa_bits,
 624      dsa_security_bits,
 625
 626      dsa_param_decode,
 627      dsa_param_encode,
 628      dsa_missing_parameters,
 629      dsa_copy_parameters,
 630      dsa_cmp_parameters,
 631      dsa_param_print,
 632      dsa_sig_print,
 633
 634      int_dsa_free,
 635      dsa_pkey_ctrl,
 636      old_dsa_priv_decode,
 637      old_dsa_priv_encode,
 638
 639      NULL, NULL, NULL,
 640      NULL, NULL, NULL,
 641      NULL, NULL, NULL, NULL,
 642
 643      dsa_pkey_dirty_cnt,
 644      dsa_pkey_export_to
 645     }
 646 };