providers/implementations/keymgmt/dsa_kmgmt.c

   1 /*
   2  * Copyright 2019-2022 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 /*
  11  * DSA low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <openssl/core_dispatch.h>
  17 #include <openssl/core_names.h>
  18 #include <openssl/bn.h>
  19 #include <openssl/err.h>
  20 #include "prov/providercommon.h"
  21 #include "prov/implementations.h"
  22 #include "prov/provider_ctx.h"
  23 #include "crypto/dsa.h"
  24 #include "internal/sizes.h"
  25 #include "internal/nelem.h"
  26 #include "internal/param_build_set.h"
  27
  28 static OSSL_FUNC_keymgmt_new_fn dsa_newdata;
  29 static OSSL_FUNC_keymgmt_free_fn dsa_freedata;
  30 static OSSL_FUNC_keymgmt_gen_init_fn dsa_gen_init;
  31 static OSSL_FUNC_keymgmt_gen_set_template_fn dsa_gen_set_template;
  32 static OSSL_FUNC_keymgmt_gen_set_params_fn dsa_gen_set_params;
  33 static OSSL_FUNC_keymgmt_gen_settable_params_fn dsa_gen_settable_params;
  34 static OSSL_FUNC_keymgmt_gen_fn dsa_gen;
  35 static OSSL_FUNC_keymgmt_gen_cleanup_fn dsa_gen_cleanup;
  36 static OSSL_FUNC_keymgmt_load_fn dsa_load;
  37 static OSSL_FUNC_keymgmt_get_params_fn dsa_get_params;
  38 static OSSL_FUNC_keymgmt_gettable_params_fn dsa_gettable_params;
  39 static OSSL_FUNC_keymgmt_has_fn dsa_has;
  40 static OSSL_FUNC_keymgmt_match_fn dsa_match;
  41 static OSSL_FUNC_keymgmt_validate_fn dsa_validate;
  42 static OSSL_FUNC_keymgmt_import_fn dsa_import;
  43 static OSSL_FUNC_keymgmt_import_types_fn dsa_import_types;
  44 static OSSL_FUNC_keymgmt_export_fn dsa_export;
  45 static OSSL_FUNC_keymgmt_export_types_fn dsa_export_types;
  46 static OSSL_FUNC_keymgmt_dup_fn dsa_dup;
  47
  48 #define DSA_DEFAULT_MD "SHA256"
  49 #define DSA_POSSIBLE_SELECTIONS                                                \
  50     (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)
  51
  52 struct dsa_gen_ctx {
  53     OSSL_LIB_CTX *libctx;
  54
  55     FFC_PARAMS *ffc_params;
  56     int selection;
  57     /* All these parameters are used for parameter generation only */
  58     size_t pbits;
  59     size_t qbits;
  60     unsigned char *seed; /* optional FIPS186-4 param for testing */
  61     size_t seedlen;
  62     int gindex; /* optional  FIPS186-4 generator index (ignored if -1) */
  63     int gen_type; /* DSA_PARAMGEN_TYPE_FIPS_186_2 or DSA_PARAMGEN_TYPE_FIPS_186_4 */
  64     int pcounter;
  65     int hindex;
  66     char *mdname;
  67     char *mdprops;
  68     OSSL_CALLBACK *cb;
  69     void *cbarg;
  70 };
  71 typedef struct dh_name2id_st{
  72     const char *name;
  73     int id;
  74 } DSA_GENTYPE_NAME2ID;
  75
  76 static const DSA_GENTYPE_NAME2ID dsatype2id[]=
  77 {
  78 #ifdef FIPS_MODULE
  79     { "default", DSA_PARAMGEN_TYPE_FIPS_186_4 },
  80 #else
  81     { "default", DSA_PARAMGEN_TYPE_FIPS_DEFAULT },
  82 #endif
  83     { "fips186_4", DSA_PARAMGEN_TYPE_FIPS_186_4 },
  84     { "fips186_2", DSA_PARAMGEN_TYPE_FIPS_186_2 },
  85 };
  86
  87 static int dsa_gen_type_name2id(const char *name)
  88 {
  89     size_t i;
  90
  91     for (i = 0; i < OSSL_NELEM(dsatype2id); ++i) {
  92         if (OPENSSL_strcasecmp(dsatype2id[i].name, name) == 0)
  93             return dsatype2id[i].id;
  94     }
  95     return -1;
  96 }
  97
  98 static int dsa_key_todata(DSA *dsa, OSSL_PARAM_BLD *bld, OSSL_PARAM params[],
  99                           int include_private)
 100 {
 101     const BIGNUM *priv = NULL, *pub = NULL;
 102
 103     if (dsa == NULL)
 104         return 0;
 105
 106     DSA_get0_key(dsa, &pub, &priv);
 107     if (include_private
 108         && priv != NULL
 109         && !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_PRIV_KEY, priv))
 110         return 0;
 111     if (pub != NULL
 112         && !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_PUB_KEY, pub))
 113         return 0;
 114
 115     return 1;
 116 }
 117
 118 static void *dsa_newdata(void *provctx)
 119 {
 120     if (!ossl_prov_is_running())
 121         return NULL;
 122     return ossl_dsa_new(PROV_LIBCTX_OF(provctx));
 123 }
 124
 125 static void dsa_freedata(void *keydata)
 126 {
 127     DSA_free(keydata);
 128 }
 129
 130 static int dsa_has(const void *keydata, int selection)
 131 {
 132     const DSA *dsa = keydata;
 133     int ok = 1;
 134
 135     if (!ossl_prov_is_running() || dsa == NULL)
 136         return 0;
 137     if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
 138         return 1; /* the selection is not missing */
 139
 140     if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
 141         ok = ok && (DSA_get0_pub_key(dsa) != NULL);
 142     if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 143         ok = ok && (DSA_get0_priv_key(dsa) != NULL);
 144     if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
 145         ok = ok && (DSA_get0_p(dsa) != NULL && DSA_get0_g(dsa) != NULL);
 146     return ok;
 147 }
 148
 149 static int dsa_match(const void *keydata1, const void *keydata2, int selection)
 150 {
 151     const DSA *dsa1 = keydata1;
 152     const DSA *dsa2 = keydata2;
 153     int ok = 1;
 154
 155     if (!ossl_prov_is_running())
 156         return 0;
 157
 158     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
 159         int key_checked = 0;
 160
 161         if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
 162             const BIGNUM *pa = DSA_get0_pub_key(dsa1);
 163             const BIGNUM *pb = DSA_get0_pub_key(dsa2);
 164
 165             if (pa != NULL && pb != NULL) {
 166                 ok = ok && BN_cmp(pa, pb) == 0;
 167                 key_checked = 1;
 168             }
 169         }
 170         if (!key_checked
 171             && (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
 172             const BIGNUM *pa = DSA_get0_priv_key(dsa1);
 173             const BIGNUM *pb = DSA_get0_priv_key(dsa2);
 174
 175             if (pa != NULL && pb != NULL) {
 176                 ok = ok && BN_cmp(pa, pb) == 0;
 177                 key_checked = 1;
 178             }
 179         }
 180         ok = ok && key_checked;
 181     }
 182     if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
 183         FFC_PARAMS *dsaparams1 = ossl_dsa_get0_params((DSA *)dsa1);
 184         FFC_PARAMS *dsaparams2 = ossl_dsa_get0_params((DSA *)dsa2);
 185
 186         ok = ok && ossl_ffc_params_cmp(dsaparams1, dsaparams2, 1);
 187     }
 188     return ok;
 189 }
 190
 191 static int dsa_import(void *keydata, int selection, const OSSL_PARAM params[])
 192 {
 193     DSA *dsa = keydata;
 194     int ok = 1;
 195
 196     if (!ossl_prov_is_running() || dsa == NULL)
 197         return 0;
 198
 199     if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
 200         return 0;
 201
 202     if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
 203         ok = ok && ossl_dsa_ffc_params_fromdata(dsa, params);
 204     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
 205         int include_private =
 206             selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
 207
 208         ok = ok && ossl_dsa_key_fromdata(dsa, params, include_private);
 209     }
 210
 211     return ok;
 212 }
 213
 214 static int dsa_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
 215                       void *cbarg)
 216 {
 217     DSA *dsa = keydata;
 218     OSSL_PARAM_BLD *tmpl;
 219     OSSL_PARAM *params = NULL;
 220     int ok = 1;
 221
 222     if (!ossl_prov_is_running() || dsa == NULL)
 223         return 0;
 224
 225     tmpl = OSSL_PARAM_BLD_new();
 226     if (tmpl == NULL)
 227         return 0;
 228
 229     if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
 230         ok = ok && ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), tmpl, NULL);
 231     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
 232         int include_private =
 233             selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
 234
 235         ok = ok && dsa_key_todata(dsa, tmpl, NULL, include_private);
 236     }
 237
 238     if (!ok
 239         || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL)
 240         goto err;
 241
 242     ok = param_cb(params, cbarg);
 243     OSSL_PARAM_free(params);
 244 err:
 245     OSSL_PARAM_BLD_free(tmpl);
 246     return ok;
 247 }
 248
 249 /* IMEXPORT = IMPORT + EXPORT */
 250
 251 # define DSA_IMEXPORTABLE_PARAMETERS                                           \
 252     OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0),                             \
 253     OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_Q, NULL, 0),                             \
 254     OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0),                             \
 255     OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_COFACTOR, NULL, 0),                      \
 256     OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL),                          \
 257     OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL),                        \
 258     OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL),                               \
 259     OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0)
 260 # define DSA_IMEXPORTABLE_PUBLIC_KEY                    \
 261     OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
 262 # define DSA_IMEXPORTABLE_PRIVATE_KEY                   \
 263     OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
 264 static const OSSL_PARAM dsa_all_types[] = {
 265     DSA_IMEXPORTABLE_PARAMETERS,
 266     DSA_IMEXPORTABLE_PUBLIC_KEY,
 267     DSA_IMEXPORTABLE_PRIVATE_KEY,
 268     OSSL_PARAM_END
 269 };
 270 static const OSSL_PARAM dsa_parameter_types[] = {
 271     DSA_IMEXPORTABLE_PARAMETERS,
 272     OSSL_PARAM_END
 273 };
 274 static const OSSL_PARAM dsa_key_types[] = {
 275     DSA_IMEXPORTABLE_PUBLIC_KEY,
 276     DSA_IMEXPORTABLE_PRIVATE_KEY,
 277     OSSL_PARAM_END
 278 };
 279 static const OSSL_PARAM *dsa_types[] = {
 280     NULL,                        /* Index 0 = none of them */
 281     dsa_parameter_types,          /* Index 1 = parameter types */
 282     dsa_key_types,                /* Index 2 = key types */
 283     dsa_all_types                 /* Index 3 = 1 + 2 */
 284 };
 285
 286 static const OSSL_PARAM *dsa_imexport_types(int selection)
 287 {
 288     int type_select = 0;
 289
 290     if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
 291         type_select += 1;
 292     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
 293         type_select += 2;
 294     return dsa_types[type_select];
 295 }
 296
 297 static const OSSL_PARAM *dsa_import_types(int selection)
 298 {
 299     return dsa_imexport_types(selection);
 300 }
 301
 302 static const OSSL_PARAM *dsa_export_types(int selection)
 303 {
 304     return dsa_imexport_types(selection);
 305 }
 306
 307 static ossl_inline int dsa_get_params(void *key, OSSL_PARAM params[])
 308 {
 309     DSA *dsa = key;
 310     OSSL_PARAM *p;
 311
 312     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
 313         && !OSSL_PARAM_set_int(p, DSA_bits(dsa)))
 314         return 0;
 315     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
 316         && !OSSL_PARAM_set_int(p, DSA_security_bits(dsa)))
 317         return 0;
 318     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
 319         && !OSSL_PARAM_set_int(p, DSA_size(dsa)))
 320         return 0;
 321     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
 322         && !OSSL_PARAM_set_utf8_string(p, DSA_DEFAULT_MD))
 323         return 0;
 324     return ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), NULL, params)
 325            && dsa_key_todata(dsa, NULL, params, 1);
 326 }
 327
 328 static const OSSL_PARAM dsa_params[] = {
 329     OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
 330     OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
 331     OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
 332     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
 333     DSA_IMEXPORTABLE_PARAMETERS,
 334     DSA_IMEXPORTABLE_PUBLIC_KEY,
 335     DSA_IMEXPORTABLE_PRIVATE_KEY,
 336     OSSL_PARAM_END
 337 };
 338
 339 static const OSSL_PARAM *dsa_gettable_params(void *provctx)
 340 {
 341     return dsa_params;
 342 }
 343
 344 static int dsa_validate_domparams(const DSA *dsa, int checktype)
 345 {
 346     int status = 0;
 347
 348     return ossl_dsa_check_params(dsa, checktype, &status);
 349 }
 350
 351 static int dsa_validate_public(const DSA *dsa)
 352 {
 353     int status = 0;
 354     const BIGNUM *pub_key = NULL;
 355
 356     DSA_get0_key(dsa, &pub_key, NULL);
 357     if (pub_key == NULL)
 358         return 0;
 359     return ossl_dsa_check_pub_key(dsa, pub_key, &status);
 360 }
 361
 362 static int dsa_validate_private(const DSA *dsa)
 363 {
 364     int status = 0;
 365     const BIGNUM *priv_key = NULL;
 366
 367     DSA_get0_key(dsa, NULL, &priv_key);
 368     if (priv_key == NULL)
 369         return 0;
 370     return ossl_dsa_check_priv_key(dsa, priv_key, &status);
 371 }
 372
 373 static int dsa_validate(const void *keydata, int selection, int checktype)
 374 {
 375     const DSA *dsa = keydata;
 376     int ok = 1;
 377
 378     if (!ossl_prov_is_running())
 379         return 0;
 380
 381     if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
 382         return 1; /* nothing to validate */
 383
 384     if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
 385         ok = ok && dsa_validate_domparams(dsa, checktype);
 386
 387     if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
 388         ok = ok && dsa_validate_public(dsa);
 389
 390     if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 391         ok = ok && dsa_validate_private(dsa);
 392
 393     /* If the whole key is selected, we do a pairwise validation */
 394     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
 395         == OSSL_KEYMGMT_SELECT_KEYPAIR)
 396         ok = ok && ossl_dsa_check_pairwise(dsa);
 397     return ok;
 398 }
 399
 400 static void *dsa_gen_init(void *provctx, int selection,
 401                           const OSSL_PARAM params[])
 402 {
 403     OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
 404     struct dsa_gen_ctx *gctx = NULL;
 405
 406     if (!ossl_prov_is_running() || (selection & DSA_POSSIBLE_SELECTIONS) == 0)
 407         return NULL;
 408
 409     if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
 410         gctx->selection = selection;
 411         gctx->libctx = libctx;
 412         gctx->pbits = 2048;
 413         gctx->qbits = 224;
 414 #ifdef FIPS_MODULE
 415         gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_186_4;
 416 #else
 417         gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_DEFAULT;
 418 #endif
 419         gctx->gindex = -1;
 420         gctx->pcounter = -1;
 421         gctx->hindex = 0;
 422     }
 423     if (!dsa_gen_set_params(gctx, params)) {
 424         OPENSSL_free(gctx);
 425         gctx = NULL;
 426     }
 427     return gctx;
 428 }
 429
 430 static int dsa_gen_set_template(void *genctx, void *templ)
 431 {
 432     struct dsa_gen_ctx *gctx = genctx;
 433     DSA *dsa = templ;
 434
 435     if (!ossl_prov_is_running() || gctx == NULL || dsa == NULL)
 436         return 0;
 437     gctx->ffc_params = ossl_dsa_get0_params(dsa);
 438     return 1;
 439 }
 440
 441 static int dsa_set_gen_seed(struct dsa_gen_ctx *gctx, unsigned char *seed,
 442                             size_t seedlen)
 443 {
 444     OPENSSL_clear_free(gctx->seed, gctx->seedlen);
 445     gctx->seed = NULL;
 446     gctx->seedlen = 0;
 447     if (seed != NULL && seedlen > 0) {
 448         gctx->seed = OPENSSL_memdup(seed, seedlen);
 449         if (gctx->seed == NULL)
 450             return 0;
 451         gctx->seedlen = seedlen;
 452     }
 453     return 1;
 454 }
 455
 456 static int dsa_gen_set_params(void *genctx, const OSSL_PARAM params[])
 457 {
 458     struct dsa_gen_ctx *gctx = genctx;
 459     const OSSL_PARAM *p;
 460
 461     if (gctx == NULL)
 462         return 0;
 463     if (params == NULL)
 464         return 1;
 465
 466
 467     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_TYPE);
 468     if (p != NULL) {
 469         if (p->data_type != OSSL_PARAM_UTF8_STRING
 470             || ((gctx->gen_type = dsa_gen_type_name2id(p->data)) == -1)) {
 471             ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
 472             return 0;
 473         }
 474     }
 475     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX);
 476     if (p != NULL
 477         && !OSSL_PARAM_get_int(p, &gctx->gindex))
 478         return 0;
 479     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER);
 480     if (p != NULL
 481         && !OSSL_PARAM_get_int(p, &gctx->pcounter))
 482         return 0;
 483     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H);
 484     if (p != NULL
 485         && !OSSL_PARAM_get_int(p, &gctx->hindex))
 486         return 0;
 487     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED);
 488     if (p != NULL
 489         && (p->data_type != OSSL_PARAM_OCTET_STRING
 490             || !dsa_set_gen_seed(gctx, p->data, p->data_size)))
 491             return 0;
 492     if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PBITS)) != NULL
 493         && !OSSL_PARAM_get_size_t(p, &gctx->pbits))
 494         return 0;
 495     if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS)) != NULL
 496         && !OSSL_PARAM_get_size_t(p, &gctx->qbits))
 497         return 0;
 498     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST);
 499     if (p != NULL) {
 500         if (p->data_type != OSSL_PARAM_UTF8_STRING)
 501             return 0;
 502         OPENSSL_free(gctx->mdname);
 503         gctx->mdname = OPENSSL_strdup(p->data);
 504         if (gctx->mdname == NULL)
 505             return 0;
 506     }
 507     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS);
 508     if (p != NULL) {
 509         if (p->data_type != OSSL_PARAM_UTF8_STRING)
 510             return 0;
 511         OPENSSL_free(gctx->mdprops);
 512         gctx->mdprops = OPENSSL_strdup(p->data);
 513         if (gctx->mdprops == NULL)
 514             return 0;
 515     }
 516     return 1;
 517 }
 518
 519 static const OSSL_PARAM *dsa_gen_settable_params(ossl_unused void *genctx,
 520                                                  ossl_unused void *provctx)
 521 {
 522     static OSSL_PARAM settable[] = {
 523         OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0),
 524         OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL),
 525         OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_QBITS, NULL),
 526         OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST, NULL, 0),
 527         OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS, NULL, 0),
 528         OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL),
 529         OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0),
 530         OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL),
 531         OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL),
 532         OSSL_PARAM_END
 533     };
 534     return settable;
 535 }
 536
 537 static int dsa_gencb(int p, int n, BN_GENCB *cb)
 538 {
 539     struct dsa_gen_ctx *gctx = BN_GENCB_get_arg(cb);
 540     OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
 541
 542     params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
 543     params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
 544
 545     return gctx->cb(params, gctx->cbarg);
 546 }
 547
 548 static void *dsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
 549 {
 550     struct dsa_gen_ctx *gctx = genctx;
 551     DSA *dsa = NULL;
 552     BN_GENCB *gencb = NULL;
 553     int ret = 0;
 554     FFC_PARAMS *ffc;
 555
 556     if (!ossl_prov_is_running() || gctx == NULL)
 557         return NULL;
 558     dsa = ossl_dsa_new(gctx->libctx);
 559     if (dsa == NULL)
 560         return NULL;
 561
 562     if (gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_DEFAULT)
 563         gctx->gen_type = (gctx->pbits >= 2048 ? DSA_PARAMGEN_TYPE_FIPS_186_4 :
 564                                                 DSA_PARAMGEN_TYPE_FIPS_186_2);
 565
 566     gctx->cb = osslcb;
 567     gctx->cbarg = cbarg;
 568     gencb = BN_GENCB_new();
 569     if (gencb != NULL)
 570         BN_GENCB_set(gencb, dsa_gencb, genctx);
 571
 572     ffc = ossl_dsa_get0_params(dsa);
 573     /* Copy the template value if one was passed */
 574     if (gctx->ffc_params != NULL
 575         && !ossl_ffc_params_copy(ffc, gctx->ffc_params))
 576         goto end;
 577
 578     if (gctx->seed != NULL
 579         && !ossl_ffc_params_set_seed(ffc, gctx->seed, gctx->seedlen))
 580         goto end;
 581     if (gctx->gindex != -1) {
 582         ossl_ffc_params_set_gindex(ffc, gctx->gindex);
 583         if (gctx->pcounter != -1)
 584             ossl_ffc_params_set_pcounter(ffc, gctx->pcounter);
 585     } else if (gctx->hindex != 0) {
 586         ossl_ffc_params_set_h(ffc, gctx->hindex);
 587     }
 588     if (gctx->mdname != NULL) {
 589         if (!ossl_ffc_set_digest(ffc, gctx->mdname, gctx->mdprops))
 590             goto end;
 591     }
 592     if ((gctx->selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
 593
 594          if (ossl_dsa_generate_ffc_parameters(dsa, gctx->gen_type,
 595                                               gctx->pbits, gctx->qbits,
 596                                               gencb) <= 0)
 597              goto end;
 598     }
 599     ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY,
 600                                  gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_186_2);
 601     if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
 602         if (ffc->p == NULL
 603             || ffc->q == NULL
 604             || ffc->g == NULL)
 605             goto end;
 606         if (DSA_generate_key(dsa) <= 0)
 607             goto end;
 608     }
 609     ret = 1;
 610 end:
 611     if (ret <= 0) {
 612         DSA_free(dsa);
 613         dsa = NULL;
 614     }
 615     BN_GENCB_free(gencb);
 616     return dsa;
 617 }
 618
 619 static void dsa_gen_cleanup(void *genctx)
 620 {
 621     struct dsa_gen_ctx *gctx = genctx;
 622
 623     if (gctx == NULL)
 624         return;
 625
 626     OPENSSL_free(gctx->mdname);
 627     OPENSSL_free(gctx->mdprops);
 628     OPENSSL_clear_free(gctx->seed, gctx->seedlen);
 629     OPENSSL_free(gctx);
 630 }
 631
 632 static void *dsa_load(const void *reference, size_t reference_sz)
 633 {
 634     DSA *dsa = NULL;
 635
 636     if (ossl_prov_is_running() && reference_sz == sizeof(dsa)) {
 637         /* The contents of the reference is the address to our object */
 638         dsa = *(DSA **)reference;
 639         /* We grabbed, so we detach it */
 640         *(DSA **)reference = NULL;
 641         return dsa;
 642     }
 643     return NULL;
 644 }
 645
 646 static void *dsa_dup(const void *keydata_from, int selection)
 647 {
 648     if (ossl_prov_is_running())
 649         return ossl_dsa_dup(keydata_from, selection);
 650     return NULL;
 651 }
 652
 653 const OSSL_DISPATCH ossl_dsa_keymgmt_functions[] = {
 654     { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dsa_newdata },
 655     { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dsa_gen_init },
 656     { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dsa_gen_set_template },
 657     { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dsa_gen_set_params },
 658     { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
 659       (void (*)(void))dsa_gen_settable_params },
 660     { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dsa_gen },
 661     { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dsa_gen_cleanup },
 662     { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dsa_load },
 663     { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dsa_freedata },
 664     { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dsa_get_params },
 665     { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dsa_gettable_params },
 666     { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dsa_has },
 667     { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dsa_match },
 668     { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dsa_validate },
 669     { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dsa_import },
 670     { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dsa_import_types },
 671     { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dsa_export },
 672     { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dsa_export_types },
 673     { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dsa_dup },
 674     { 0, NULL }
 675 };