1 /* 2 * Copyright 2019-2023 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 /* a key without parameters is meaningless */ 203 ok = ok && ossl_dsa_ffc_params_fromdata(dsa, params); 204 205 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { 206 int include_private = 207 selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0; 208 209 ok = ok && ossl_dsa_key_fromdata(dsa, params, include_private); 210 } 211 212 return ok; 213 } 214 215 static int dsa_export(void *keydata, int selection, OSSL_CALLBACK *param_cb, 216 void *cbarg) 217 { 218 DSA *dsa = keydata; 219 OSSL_PARAM_BLD *tmpl; 220 OSSL_PARAM *params = NULL; 221 int ok = 1; 222 223 if (!ossl_prov_is_running() || dsa == NULL) 224 return 0; 225 226 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0) 227 return 0; 228 229 tmpl = OSSL_PARAM_BLD_new(); 230 if (tmpl == NULL) 231 return 0; 232 233 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0) 234 ok = ok && ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), tmpl, NULL); 235 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { 236 int include_private = 237 selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0; 238 239 ok = ok && dsa_key_todata(dsa, tmpl, NULL, include_private); 240 } 241 242 if (!ok || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) { 243 ok = 0; 244 goto err; 245 } 246 247 ok = param_cb(params, cbarg); 248 OSSL_PARAM_free(params); 249 err: 250 OSSL_PARAM_BLD_free(tmpl); 251 return ok; 252 } 253 254 /* IMEXPORT = IMPORT + EXPORT */ 255 256 # define DSA_IMEXPORTABLE_PARAMETERS \ 257 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0), \ 258 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_Q, NULL, 0), \ 259 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0), \ 260 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_COFACTOR, NULL, 0), \ 261 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL), \ 262 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL), \ 263 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL), \ 264 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0) 265 # define DSA_IMEXPORTABLE_PUBLIC_KEY \ 266 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0) 267 # define DSA_IMEXPORTABLE_PRIVATE_KEY \ 268 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0) 269 static const OSSL_PARAM dsa_all_types[] = { 270 DSA_IMEXPORTABLE_PARAMETERS, 271 DSA_IMEXPORTABLE_PUBLIC_KEY, 272 DSA_IMEXPORTABLE_PRIVATE_KEY, 273 OSSL_PARAM_END 274 }; 275 static const OSSL_PARAM dsa_parameter_types[] = { 276 DSA_IMEXPORTABLE_PARAMETERS, 277 OSSL_PARAM_END 278 }; 279 static const OSSL_PARAM dsa_key_types[] = { 280 DSA_IMEXPORTABLE_PUBLIC_KEY, 281 DSA_IMEXPORTABLE_PRIVATE_KEY, 282 OSSL_PARAM_END 283 }; 284 static const OSSL_PARAM *dsa_types[] = { 285 NULL, /* Index 0 = none of them */ 286 dsa_parameter_types, /* Index 1 = parameter types */ 287 dsa_key_types, /* Index 2 = key types */ 288 dsa_all_types /* Index 3 = 1 + 2 */ 289 }; 290 291 static const OSSL_PARAM *dsa_imexport_types(int selection) 292 { 293 int type_select = 0; 294 295 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0) 296 type_select += 1; 297 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) 298 type_select += 2; 299 return dsa_types[type_select]; 300 } 301 302 static const OSSL_PARAM *dsa_import_types(int selection) 303 { 304 return dsa_imexport_types(selection); 305 } 306 307 static const OSSL_PARAM *dsa_export_types(int selection) 308 { 309 return dsa_imexport_types(selection); 310 } 311 312 static ossl_inline int dsa_get_params(void *key, OSSL_PARAM params[]) 313 { 314 DSA *dsa = key; 315 OSSL_PARAM *p; 316 317 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL 318 && !OSSL_PARAM_set_int(p, DSA_bits(dsa))) 319 return 0; 320 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL 321 && !OSSL_PARAM_set_int(p, DSA_security_bits(dsa))) 322 return 0; 323 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL 324 && !OSSL_PARAM_set_int(p, DSA_size(dsa))) 325 return 0; 326 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL 327 && !OSSL_PARAM_set_utf8_string(p, DSA_DEFAULT_MD)) 328 return 0; 329 return ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), NULL, params) 330 && dsa_key_todata(dsa, NULL, params, 1); 331 } 332 333 static const OSSL_PARAM dsa_params[] = { 334 OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL), 335 OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL), 336 OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL), 337 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0), 338 DSA_IMEXPORTABLE_PARAMETERS, 339 DSA_IMEXPORTABLE_PUBLIC_KEY, 340 DSA_IMEXPORTABLE_PRIVATE_KEY, 341 OSSL_PARAM_END 342 }; 343 344 static const OSSL_PARAM *dsa_gettable_params(void *provctx) 345 { 346 return dsa_params; 347 } 348 349 static int dsa_validate_domparams(const DSA *dsa, int checktype) 350 { 351 int status = 0; 352 353 return ossl_dsa_check_params(dsa, checktype, &status); 354 } 355 356 static int dsa_validate_public(const DSA *dsa) 357 { 358 int status = 0; 359 const BIGNUM *pub_key = NULL; 360 361 DSA_get0_key(dsa, &pub_key, NULL); 362 if (pub_key == NULL) 363 return 0; 364 return ossl_dsa_check_pub_key(dsa, pub_key, &status); 365 } 366 367 static int dsa_validate_private(const DSA *dsa) 368 { 369 int status = 0; 370 const BIGNUM *priv_key = NULL; 371 372 DSA_get0_key(dsa, NULL, &priv_key); 373 if (priv_key == NULL) 374 return 0; 375 return ossl_dsa_check_priv_key(dsa, priv_key, &status); 376 } 377 378 static int dsa_validate(const void *keydata, int selection, int checktype) 379 { 380 const DSA *dsa = keydata; 381 int ok = 1; 382 383 if (!ossl_prov_is_running()) 384 return 0; 385 386 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0) 387 return 1; /* nothing to validate */ 388 389 if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) 390 ok = ok && dsa_validate_domparams(dsa, checktype); 391 392 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) 393 ok = ok && dsa_validate_public(dsa); 394 395 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) 396 ok = ok && dsa_validate_private(dsa); 397 398 /* If the whole key is selected, we do a pairwise validation */ 399 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) 400 == OSSL_KEYMGMT_SELECT_KEYPAIR) 401 ok = ok && ossl_dsa_check_pairwise(dsa); 402 return ok; 403 } 404 405 static void *dsa_gen_init(void *provctx, int selection, 406 const OSSL_PARAM params[]) 407 { 408 OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx); 409 struct dsa_gen_ctx *gctx = NULL; 410 411 if (!ossl_prov_is_running() || (selection & DSA_POSSIBLE_SELECTIONS) == 0) 412 return NULL; 413 414 if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) { 415 gctx->selection = selection; 416 gctx->libctx = libctx; 417 gctx->pbits = 2048; 418 gctx->qbits = 224; 419 #ifdef FIPS_MODULE 420 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_186_4; 421 #else 422 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_DEFAULT; 423 #endif 424 gctx->gindex = -1; 425 gctx->pcounter = -1; 426 gctx->hindex = 0; 427 } 428 if (!dsa_gen_set_params(gctx, params)) { 429 OPENSSL_free(gctx); 430 gctx = NULL; 431 } 432 return gctx; 433 } 434 435 static int dsa_gen_set_template(void *genctx, void *templ) 436 { 437 struct dsa_gen_ctx *gctx = genctx; 438 DSA *dsa = templ; 439 440 if (!ossl_prov_is_running() || gctx == NULL || dsa == NULL) 441 return 0; 442 gctx->ffc_params = ossl_dsa_get0_params(dsa); 443 return 1; 444 } 445 446 static int dsa_set_gen_seed(struct dsa_gen_ctx *gctx, unsigned char *seed, 447 size_t seedlen) 448 { 449 OPENSSL_clear_free(gctx->seed, gctx->seedlen); 450 gctx->seed = NULL; 451 gctx->seedlen = 0; 452 if (seed != NULL && seedlen > 0) { 453 gctx->seed = OPENSSL_memdup(seed, seedlen); 454 if (gctx->seed == NULL) 455 return 0; 456 gctx->seedlen = seedlen; 457 } 458 return 1; 459 } 460 461 static int dsa_gen_set_params(void *genctx, const OSSL_PARAM params[]) 462 { 463 struct dsa_gen_ctx *gctx = genctx; 464 const OSSL_PARAM *p; 465 466 if (gctx == NULL) 467 return 0; 468 if (params == NULL) 469 return 1; 470 471 472 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_TYPE); 473 if (p != NULL) { 474 if (p->data_type != OSSL_PARAM_UTF8_STRING 475 || ((gctx->gen_type = dsa_gen_type_name2id(p->data)) == -1)) { 476 ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT); 477 return 0; 478 } 479 } 480 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX); 481 if (p != NULL 482 && !OSSL_PARAM_get_int(p, &gctx->gindex)) 483 return 0; 484 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER); 485 if (p != NULL 486 && !OSSL_PARAM_get_int(p, &gctx->pcounter)) 487 return 0; 488 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H); 489 if (p != NULL 490 && !OSSL_PARAM_get_int(p, &gctx->hindex)) 491 return 0; 492 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED); 493 if (p != NULL 494 && (p->data_type != OSSL_PARAM_OCTET_STRING 495 || !dsa_set_gen_seed(gctx, p->data, p->data_size))) 496 return 0; 497 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PBITS)) != NULL 498 && !OSSL_PARAM_get_size_t(p, &gctx->pbits)) 499 return 0; 500 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS)) != NULL 501 && !OSSL_PARAM_get_size_t(p, &gctx->qbits)) 502 return 0; 503 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST); 504 if (p != NULL) { 505 if (p->data_type != OSSL_PARAM_UTF8_STRING) 506 return 0; 507 OPENSSL_free(gctx->mdname); 508 gctx->mdname = OPENSSL_strdup(p->data); 509 if (gctx->mdname == NULL) 510 return 0; 511 } 512 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS); 513 if (p != NULL) { 514 if (p->data_type != OSSL_PARAM_UTF8_STRING) 515 return 0; 516 OPENSSL_free(gctx->mdprops); 517 gctx->mdprops = OPENSSL_strdup(p->data); 518 if (gctx->mdprops == NULL) 519 return 0; 520 } 521 return 1; 522 } 523 524 static const OSSL_PARAM *dsa_gen_settable_params(ossl_unused void *genctx, 525 ossl_unused void *provctx) 526 { 527 static OSSL_PARAM settable[] = { 528 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0), 529 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL), 530 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_QBITS, NULL), 531 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST, NULL, 0), 532 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS, NULL, 0), 533 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL), 534 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0), 535 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL), 536 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL), 537 OSSL_PARAM_END 538 }; 539 return settable; 540 } 541 542 static int dsa_gencb(int p, int n, BN_GENCB *cb) 543 { 544 struct dsa_gen_ctx *gctx = BN_GENCB_get_arg(cb); 545 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END }; 546 547 params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p); 548 params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n); 549 550 return gctx->cb(params, gctx->cbarg); 551 } 552 553 static void *dsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg) 554 { 555 struct dsa_gen_ctx *gctx = genctx; 556 DSA *dsa = NULL; 557 BN_GENCB *gencb = NULL; 558 int ret = 0; 559 FFC_PARAMS *ffc; 560 561 if (!ossl_prov_is_running() || gctx == NULL) 562 return NULL; 563 dsa = ossl_dsa_new(gctx->libctx); 564 if (dsa == NULL) 565 return NULL; 566 567 if (gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_DEFAULT) 568 gctx->gen_type = (gctx->pbits >= 2048 ? DSA_PARAMGEN_TYPE_FIPS_186_4 : 569 DSA_PARAMGEN_TYPE_FIPS_186_2); 570 571 gctx->cb = osslcb; 572 gctx->cbarg = cbarg; 573 gencb = BN_GENCB_new(); 574 if (gencb != NULL) 575 BN_GENCB_set(gencb, dsa_gencb, genctx); 576 577 ffc = ossl_dsa_get0_params(dsa); 578 /* Copy the template value if one was passed */ 579 if (gctx->ffc_params != NULL 580 && !ossl_ffc_params_copy(ffc, gctx->ffc_params)) 581 goto end; 582 583 if (gctx->seed != NULL 584 && !ossl_ffc_params_set_seed(ffc, gctx->seed, gctx->seedlen)) 585 goto end; 586 if (gctx->gindex != -1) { 587 ossl_ffc_params_set_gindex(ffc, gctx->gindex); 588 if (gctx->pcounter != -1) 589 ossl_ffc_params_set_pcounter(ffc, gctx->pcounter); 590 } else if (gctx->hindex != 0) { 591 ossl_ffc_params_set_h(ffc, gctx->hindex); 592 } 593 if (gctx->mdname != NULL) { 594 if (!ossl_ffc_set_digest(ffc, gctx->mdname, gctx->mdprops)) 595 goto end; 596 } 597 if ((gctx->selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) { 598 599 if (ossl_dsa_generate_ffc_parameters(dsa, gctx->gen_type, 600 gctx->pbits, gctx->qbits, 601 gencb) <= 0) 602 goto end; 603 } 604 ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY, 605 gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_186_2); 606 if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { 607 if (ffc->p == NULL 608 || ffc->q == NULL 609 || ffc->g == NULL) 610 goto end; 611 if (DSA_generate_key(dsa) <= 0) 612 goto end; 613 } 614 ret = 1; 615 end: 616 if (ret <= 0) { 617 DSA_free(dsa); 618 dsa = NULL; 619 } 620 BN_GENCB_free(gencb); 621 return dsa; 622 } 623 624 static void dsa_gen_cleanup(void *genctx) 625 { 626 struct dsa_gen_ctx *gctx = genctx; 627 628 if (gctx == NULL) 629 return; 630 631 OPENSSL_free(gctx->mdname); 632 OPENSSL_free(gctx->mdprops); 633 OPENSSL_clear_free(gctx->seed, gctx->seedlen); 634 OPENSSL_free(gctx); 635 } 636 637 static void *dsa_load(const void *reference, size_t reference_sz) 638 { 639 DSA *dsa = NULL; 640 641 if (ossl_prov_is_running() && reference_sz == sizeof(dsa)) { 642 /* The contents of the reference is the address to our object */ 643 dsa = *(DSA **)reference; 644 /* We grabbed, so we detach it */ 645 *(DSA **)reference = NULL; 646 return dsa; 647 } 648 return NULL; 649 } 650 651 static void *dsa_dup(const void *keydata_from, int selection) 652 { 653 if (ossl_prov_is_running()) 654 return ossl_dsa_dup(keydata_from, selection); 655 return NULL; 656 } 657 658 const OSSL_DISPATCH ossl_dsa_keymgmt_functions[] = { 659 { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dsa_newdata }, 660 { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dsa_gen_init }, 661 { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dsa_gen_set_template }, 662 { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dsa_gen_set_params }, 663 { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS, 664 (void (*)(void))dsa_gen_settable_params }, 665 { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dsa_gen }, 666 { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dsa_gen_cleanup }, 667 { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dsa_load }, 668 { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dsa_freedata }, 669 { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dsa_get_params }, 670 { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dsa_gettable_params }, 671 { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dsa_has }, 672 { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dsa_match }, 673 { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dsa_validate }, 674 { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dsa_import }, 675 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dsa_import_types }, 676 { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dsa_export }, 677 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dsa_export_types }, 678 { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dsa_dup }, 679 { 0, NULL } 680 }; 681