crypto/evp/pmeth_lib.c

   1 /*
   2  * Copyright 2006-2020 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  * Low level key APIs (DH etc) are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18 #include <openssl/engine.h>
  19 #include <openssl/evp.h>
  20 #include <openssl/x509v3.h>
  21 #include <openssl/core_names.h>
  22 #include <openssl/dh.h>
  23 #include <openssl/rsa.h>
  24 #include "internal/cryptlib.h"
  25 #include "crypto/asn1.h"
  26 #include "crypto/evp.h"
  27 #include "crypto/dh.h"
  28 #include "internal/ffc.h"
  29 #include "internal/numbers.h"
  30 #include "internal/provider.h"
  31 #include "evp_local.h"
  32
  33 #ifndef FIPS_MODE
  34
  35 typedef const EVP_PKEY_METHOD *(*pmeth_fn)(void);
  36 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  37
  38 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  39
  40 /* This array needs to be in order of NIDs */
  41 static pmeth_fn standard_methods[] = {
  42 # ifndef OPENSSL_NO_RSA
  43     rsa_pkey_method,
  44 # endif
  45 # ifndef OPENSSL_NO_DH
  46     dh_pkey_method,
  47 # endif
  48 # ifndef OPENSSL_NO_DSA
  49     dsa_pkey_method,
  50 # endif
  51 # ifndef OPENSSL_NO_EC
  52     ec_pkey_method,
  53 # endif
  54     hmac_pkey_method,
  55 # ifndef OPENSSL_NO_CMAC
  56     cmac_pkey_method,
  57 # endif
  58 # ifndef OPENSSL_NO_RSA
  59     rsa_pss_pkey_method,
  60 # endif
  61 # ifndef OPENSSL_NO_DH
  62     dhx_pkey_method,
  63 # endif
  64 # ifndef OPENSSL_NO_SCRYPT
  65     scrypt_pkey_method,
  66 # endif
  67     tls1_prf_pkey_method,
  68 # ifndef OPENSSL_NO_EC
  69     ecx25519_pkey_method,
  70     ecx448_pkey_method,
  71 # endif
  72     hkdf_pkey_method,
  73 # ifndef OPENSSL_NO_POLY1305
  74     poly1305_pkey_method,
  75 # endif
  76 # ifndef OPENSSL_NO_SIPHASH
  77     siphash_pkey_method,
  78 # endif
  79 # ifndef OPENSSL_NO_EC
  80     ed25519_pkey_method,
  81     ed448_pkey_method,
  82 # endif
  83 # ifndef OPENSSL_NO_SM2
  84     sm2_pkey_method,
  85 # endif
  86 };
  87
  88 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, pmeth_fn, pmeth_func);
  89
  90 static int pmeth_func_cmp(const EVP_PKEY_METHOD *const *a, pmeth_fn const *b)
  91 {
  92     return ((*a)->pkey_id - ((**b)())->pkey_id);
  93 }
  94
  95 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, pmeth_fn, pmeth_func);
  96
  97 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
  98                      const EVP_PKEY_METHOD *const *b)
  99 {
 100     return ((*a)->pkey_id - (*b)->pkey_id);
 101 }
 102
 103 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
 104 {
 105     pmeth_fn *ret;
 106     EVP_PKEY_METHOD tmp;
 107     const EVP_PKEY_METHOD *t = &tmp;
 108
 109     tmp.pkey_id = type;
 110     if (app_pkey_methods) {
 111         int idx;
 112         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
 113         if (idx >= 0)
 114             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 115     }
 116     ret = OBJ_bsearch_pmeth_func(&t, standard_methods,
 117                                  sizeof(standard_methods) /
 118                                  sizeof(pmeth_fn));
 119     if (ret == NULL || *ret == NULL)
 120         return NULL;
 121     return (**ret)();
 122 }
 123
 124 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 125 {
 126     EVP_PKEY_METHOD *pmeth;
 127
 128     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 129     if (pmeth == NULL) {
 130         EVPerr(EVP_F_EVP_PKEY_METH_NEW, ERR_R_MALLOC_FAILURE);
 131         return NULL;
 132     }
 133
 134     pmeth->pkey_id = id;
 135     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 136     return pmeth;
 137 }
 138 #endif /* FIPS_MODE */
 139
 140 static EVP_PKEY_CTX *int_ctx_new(OPENSSL_CTX *libctx,
 141                                  EVP_PKEY *pkey, ENGINE *e,
 142                                  const char *keytype, const char *propquery,
 143                                  int id)
 144
 145 {
 146     EVP_PKEY_CTX *ret;
 147     const EVP_PKEY_METHOD *pmeth = NULL;
 148     EVP_KEYMGMT *keymgmt = NULL;
 149
 150     /*
 151      * When using providers, the context is bound to the algo implementation
 152      * later.
 153      */
 154     if (pkey == NULL && e == NULL && id == -1)
 155         goto common;
 156
 157     /*
 158      * If the key doesn't contain anything legacy, then it must be provided,
 159      * so we extract the necessary information and use that.
 160      */
 161     if (pkey != NULL && pkey->type == EVP_PKEY_NONE) {
 162         /* If we have an engine, something went wrong somewhere... */
 163         if (!ossl_assert(e == NULL))
 164             return NULL;
 165         keytype = evp_first_name(pkey->keymgmt->prov, pkey->keymgmt->name_id);
 166         goto common;
 167     }
 168 #ifndef FIPS_MODE
 169     /* TODO(3.0) Legacy code should be removed when all is provider based */
 170     /* BEGIN legacy */
 171     if (id == -1) {
 172         if (pkey == NULL)
 173             return NULL;
 174         id = pkey->type;
 175     }
 176
 177     /*
 178      * Here, we extract what information we can for the purpose of
 179      * supporting usage with implementations from providers, to make
 180      * for a smooth transition from legacy stuff to provider based stuff.
 181      *
 182      * If an engine is given, this is entirely legacy, and we should not
 183      * pretend anything else, so we only set the name when no engine is
 184      * given.  If both are already given, someone made a mistake, and
 185      * since that can only happen internally, it's safe to make an
 186      * assertion.
 187      */
 188     if (!ossl_assert(e == NULL || keytype == NULL))
 189         return NULL;
 190     if (e == NULL)
 191         keytype = OBJ_nid2sn(id);
 192
 193 # ifndef OPENSSL_NO_ENGINE
 194     if (e == NULL && pkey != NULL)
 195         e = pkey->pmeth_engine != NULL ? pkey->pmeth_engine : pkey->engine;
 196     /* Try to find an ENGINE which implements this method */
 197     if (e) {
 198         if (!ENGINE_init(e)) {
 199             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 200             return NULL;
 201         }
 202     } else {
 203         e = ENGINE_get_pkey_meth_engine(id);
 204     }
 205
 206     /*
 207      * If an ENGINE handled this method look it up. Otherwise use internal
 208      * tables.
 209      */
 210     if (e)
 211         pmeth = ENGINE_get_pkey_meth(e, id);
 212     else
 213 # endif
 214         pmeth = EVP_PKEY_meth_find(id);
 215
 216     if (pmeth == NULL) {
 217 # ifndef OPENSSL_NO_ENGINE
 218         ENGINE_finish(e);
 219 # endif
 220         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 221         return NULL;
 222     }
 223     /* END legacy */
 224 #endif /* FIPS_MODE */
 225  common:
 226     /*
 227      * If there's no engine and there's a name, we try fetching a provider
 228      * implementation.
 229      */
 230     if (e == NULL && keytype != NULL) {
 231         /* This could fail so ignore errors */
 232         ERR_set_mark();
 233         keymgmt = EVP_KEYMGMT_fetch(libctx, keytype, propquery);
 234         ERR_pop_to_mark();
 235     }
 236
 237     ret = OPENSSL_zalloc(sizeof(*ret));
 238     if (ret == NULL) {
 239         EVP_KEYMGMT_free(keymgmt);
 240 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
 241         ENGINE_finish(e);
 242 #endif
 243         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 244         return NULL;
 245     }
 246     ret->libctx = libctx;
 247     ret->propquery = propquery;
 248     ret->keytype = keytype;
 249     ret->keymgmt = keymgmt;
 250     ret->engine = e;
 251     ret->pmeth = pmeth;
 252     ret->operation = EVP_PKEY_OP_UNDEFINED;
 253     ret->pkey = pkey;
 254     if (pkey != NULL)
 255         EVP_PKEY_up_ref(pkey);
 256
 257     if (pmeth != NULL && pmeth->init != NULL) {
 258         if (pmeth->init(ret) <= 0) {
 259             ret->pmeth = NULL;
 260             EVP_PKEY_CTX_free(ret);
 261             return NULL;
 262         }
 263     }
 264
 265     return ret;
 266 }
 267
 268 /*- All methods below can also be used in FIPS_MODE */
 269
 270 EVP_PKEY_CTX *EVP_PKEY_CTX_new_from_name(OPENSSL_CTX *libctx,
 271                                          const char *name,
 272                                          const char *propquery)
 273 {
 274     return int_ctx_new(libctx, NULL, NULL, name, propquery, -1);
 275 }
 276
 277 EVP_PKEY_CTX *EVP_PKEY_CTX_new_from_pkey(OPENSSL_CTX *libctx, EVP_PKEY *pkey,
 278                                          const char *propquery)
 279 {
 280     return int_ctx_new(libctx, pkey, NULL, NULL, propquery, -1);
 281 }
 282
 283 void evp_pkey_ctx_free_old_ops(EVP_PKEY_CTX *ctx)
 284 {
 285     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 286         if (ctx->op.sig.sigprovctx != NULL && ctx->op.sig.signature != NULL)
 287             ctx->op.sig.signature->freectx(ctx->op.sig.sigprovctx);
 288         EVP_SIGNATURE_free(ctx->op.sig.signature);
 289         ctx->op.sig.sigprovctx = NULL;
 290         ctx->op.sig.signature = NULL;
 291     } else if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 292         if (ctx->op.kex.exchprovctx != NULL && ctx->op.kex.exchange != NULL)
 293             ctx->op.kex.exchange->freectx(ctx->op.kex.exchprovctx);
 294         EVP_KEYEXCH_free(ctx->op.kex.exchange);
 295         ctx->op.kex.exchprovctx = NULL;
 296         ctx->op.kex.exchange = NULL;
 297     }
 298 /* TODO(3.0): add dependancies and uncomment this when available for fips mode */
 299 #ifndef FIPS_MODE
 300     else if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) {
 301         if (ctx->op.ciph.ciphprovctx != NULL && ctx->op.ciph.cipher != NULL)
 302             ctx->op.ciph.cipher->freectx(ctx->op.ciph.ciphprovctx);
 303         EVP_ASYM_CIPHER_free(ctx->op.ciph.cipher);
 304         ctx->op.ciph.ciphprovctx = NULL;
 305         ctx->op.ciph.cipher = NULL;
 306     } else if (EVP_PKEY_CTX_IS_GEN_OP(ctx)) {
 307         if (ctx->op.keymgmt.genctx != NULL && ctx->keymgmt != NULL)
 308             evp_keymgmt_gen_cleanup(ctx->keymgmt, ctx->op.keymgmt.genctx);
 309     }
 310 #endif
 311 }
 312
 313 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 314 {
 315     if (ctx == NULL)
 316         return;
 317     if (ctx->pmeth && ctx->pmeth->cleanup)
 318         ctx->pmeth->cleanup(ctx);
 319
 320     evp_pkey_ctx_free_old_ops(ctx);
 321     EVP_KEYMGMT_free(ctx->keymgmt);
 322
 323     EVP_PKEY_free(ctx->pkey);
 324     EVP_PKEY_free(ctx->peerkey);
 325 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
 326     ENGINE_finish(ctx->engine);
 327 #endif
 328     OPENSSL_free(ctx);
 329 }
 330
 331 #ifndef FIPS_MODE
 332
 333 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 334                              const EVP_PKEY_METHOD *meth)
 335 {
 336     if (ppkey_id)
 337         *ppkey_id = meth->pkey_id;
 338     if (pflags)
 339         *pflags = meth->flags;
 340 }
 341
 342 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 343 {
 344
 345     dst->init = src->init;
 346     dst->copy = src->copy;
 347     dst->cleanup = src->cleanup;
 348
 349     dst->paramgen_init = src->paramgen_init;
 350     dst->paramgen = src->paramgen;
 351
 352     dst->keygen_init = src->keygen_init;
 353     dst->keygen = src->keygen;
 354
 355     dst->sign_init = src->sign_init;
 356     dst->sign = src->sign;
 357
 358     dst->verify_init = src->verify_init;
 359     dst->verify = src->verify;
 360
 361     dst->verify_recover_init = src->verify_recover_init;
 362     dst->verify_recover = src->verify_recover;
 363
 364     dst->signctx_init = src->signctx_init;
 365     dst->signctx = src->signctx;
 366
 367     dst->verifyctx_init = src->verifyctx_init;
 368     dst->verifyctx = src->verifyctx;
 369
 370     dst->encrypt_init = src->encrypt_init;
 371     dst->encrypt = src->encrypt;
 372
 373     dst->decrypt_init = src->decrypt_init;
 374     dst->decrypt = src->decrypt;
 375
 376     dst->derive_init = src->derive_init;
 377     dst->derive = src->derive;
 378
 379     dst->ctrl = src->ctrl;
 380     dst->ctrl_str = src->ctrl_str;
 381
 382     dst->check = src->check;
 383 }
 384
 385 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 386 {
 387     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 388         OPENSSL_free(pmeth);
 389 }
 390
 391 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 392 {
 393     return int_ctx_new(NULL, pkey, e, NULL, NULL, -1);
 394 }
 395
 396 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 397 {
 398     return int_ctx_new(NULL, NULL, e, NULL, NULL, id);
 399 }
 400
 401 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(const EVP_PKEY_CTX *pctx)
 402 {
 403     EVP_PKEY_CTX *rctx;
 404
 405     if (((pctx->pmeth == NULL) || (pctx->pmeth->copy == NULL))
 406             && ((EVP_PKEY_CTX_IS_DERIVE_OP(pctx)
 407                  && pctx->op.kex.exchprovctx == NULL)
 408                 || (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)
 409                     && pctx->op.sig.sigprovctx == NULL)))
 410         return NULL;
 411 # ifndef OPENSSL_NO_ENGINE
 412     /* Make sure it's safe to copy a pkey context using an ENGINE */
 413     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 414         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 415         return 0;
 416     }
 417 # endif
 418     rctx = OPENSSL_zalloc(sizeof(*rctx));
 419     if (rctx == NULL) {
 420         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_MALLOC_FAILURE);
 421         return NULL;
 422     }
 423
 424     if (pctx->pkey != NULL)
 425         EVP_PKEY_up_ref(pctx->pkey);
 426     rctx->pkey = pctx->pkey;
 427     rctx->operation = pctx->operation;
 428     rctx->libctx = pctx->libctx;
 429     rctx->keytype = pctx->keytype;
 430     rctx->propquery = pctx->propquery;
 431
 432     if (EVP_PKEY_CTX_IS_DERIVE_OP(pctx)) {
 433         if (pctx->op.kex.exchange != NULL) {
 434             rctx->op.kex.exchange = pctx->op.kex.exchange;
 435             if (!EVP_KEYEXCH_up_ref(rctx->op.kex.exchange)) {
 436                 OPENSSL_free(rctx);
 437                 return NULL;
 438             }
 439         }
 440         if (pctx->op.kex.exchprovctx != NULL) {
 441             if (!ossl_assert(pctx->op.kex.exchange != NULL))
 442                 return NULL;
 443             rctx->op.kex.exchprovctx
 444                 = pctx->op.kex.exchange->dupctx(pctx->op.kex.exchprovctx);
 445             if (rctx->op.kex.exchprovctx == NULL) {
 446                 EVP_KEYEXCH_free(rctx->op.kex.exchange);
 447                 OPENSSL_free(rctx);
 448                 return NULL;
 449             }
 450             return rctx;
 451         }
 452     } else if (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)) {
 453         if (pctx->op.sig.signature != NULL) {
 454             rctx->op.sig.signature = pctx->op.sig.signature;
 455             if (!EVP_SIGNATURE_up_ref(rctx->op.sig.signature)) {
 456                 OPENSSL_free(rctx);
 457                 return NULL;
 458             }
 459         }
 460         if (pctx->op.sig.sigprovctx != NULL) {
 461             if (!ossl_assert(pctx->op.sig.signature != NULL))
 462                 return NULL;
 463             rctx->op.sig.sigprovctx
 464                 = pctx->op.sig.signature->dupctx(pctx->op.sig.sigprovctx);
 465             if (rctx->op.sig.sigprovctx == NULL) {
 466                 EVP_SIGNATURE_free(rctx->op.sig.signature);
 467                 OPENSSL_free(rctx);
 468                 return NULL;
 469             }
 470             return rctx;
 471         }
 472     } else if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(pctx)) {
 473         if (pctx->op.ciph.cipher != NULL) {
 474             rctx->op.ciph.cipher = pctx->op.ciph.cipher;
 475             if (!EVP_ASYM_CIPHER_up_ref(rctx->op.ciph.cipher)) {
 476                 OPENSSL_free(rctx);
 477                 return NULL;
 478             }
 479         }
 480         if (pctx->op.ciph.ciphprovctx != NULL) {
 481             if (!ossl_assert(pctx->op.ciph.cipher != NULL))
 482                 return NULL;
 483             rctx->op.ciph.ciphprovctx
 484                 = pctx->op.ciph.cipher->dupctx(pctx->op.ciph.ciphprovctx);
 485             if (rctx->op.ciph.ciphprovctx == NULL) {
 486                 EVP_ASYM_CIPHER_free(rctx->op.ciph.cipher);
 487                 OPENSSL_free(rctx);
 488                 return NULL;
 489             }
 490             return rctx;
 491         }
 492     }
 493
 494     rctx->pmeth = pctx->pmeth;
 495 # ifndef OPENSSL_NO_ENGINE
 496     rctx->engine = pctx->engine;
 497 # endif
 498
 499     if (pctx->peerkey)
 500         EVP_PKEY_up_ref(pctx->peerkey);
 501     rctx->peerkey = pctx->peerkey;
 502
 503     if (pctx->pmeth->copy(rctx, pctx) > 0)
 504         return rctx;
 505
 506     rctx->pmeth = NULL;
 507     EVP_PKEY_CTX_free(rctx);
 508     return NULL;
 509
 510 }
 511
 512 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 513 {
 514     if (app_pkey_methods == NULL) {
 515         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 516         if (app_pkey_methods == NULL){
 517             EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 518             return 0;
 519         }
 520     }
 521     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth)) {
 522         EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 523         return 0;
 524     }
 525     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 526     return 1;
 527 }
 528
 529 void evp_app_cleanup_int(void)
 530 {
 531     if (app_pkey_methods != NULL)
 532         sk_EVP_PKEY_METHOD_pop_free(app_pkey_methods, EVP_PKEY_meth_free);
 533 }
 534
 535 int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth)
 536 {
 537     const EVP_PKEY_METHOD *ret;
 538
 539     ret = sk_EVP_PKEY_METHOD_delete_ptr(app_pkey_methods, pmeth);
 540
 541     return ret == NULL ? 0 : 1;
 542 }
 543
 544 size_t EVP_PKEY_meth_get_count(void)
 545 {
 546     size_t rv = OSSL_NELEM(standard_methods);
 547
 548     if (app_pkey_methods)
 549         rv += sk_EVP_PKEY_METHOD_num(app_pkey_methods);
 550     return rv;
 551 }
 552
 553 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx)
 554 {
 555     if (idx < OSSL_NELEM(standard_methods))
 556         return (standard_methods[idx])();
 557     if (app_pkey_methods == NULL)
 558         return NULL;
 559     idx -= OSSL_NELEM(standard_methods);
 560     if (idx >= (size_t)sk_EVP_PKEY_METHOD_num(app_pkey_methods))
 561         return NULL;
 562     return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 563 }
 564 #endif
 565
 566 int EVP_PKEY_CTX_set_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 567 {
 568     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 569             && ctx->op.kex.exchprovctx != NULL
 570             && ctx->op.kex.exchange != NULL
 571             && ctx->op.kex.exchange->set_ctx_params != NULL)
 572         return ctx->op.kex.exchange->set_ctx_params(ctx->op.kex.exchprovctx,
 573                                                     params);
 574     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 575             && ctx->op.sig.sigprovctx != NULL
 576             && ctx->op.sig.signature != NULL
 577             && ctx->op.sig.signature->set_ctx_params != NULL)
 578         return ctx->op.sig.signature->set_ctx_params(ctx->op.sig.sigprovctx,
 579                                                      params);
 580     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 581             && ctx->op.ciph.ciphprovctx != NULL
 582             && ctx->op.ciph.cipher != NULL
 583             && ctx->op.ciph.cipher->set_ctx_params != NULL)
 584         return ctx->op.ciph.cipher->set_ctx_params(ctx->op.ciph.ciphprovctx,
 585                                                      params);
 586     if (EVP_PKEY_CTX_IS_GEN_OP(ctx)
 587         && ctx->op.keymgmt.genctx != NULL
 588         && ctx->keymgmt != NULL
 589         && ctx->keymgmt->gen_set_params != NULL)
 590         return evp_keymgmt_gen_set_params(ctx->keymgmt, ctx->op.keymgmt.genctx,
 591                                           params);
 592     return 0;
 593 }
 594
 595 #ifndef FIPS_MODE
 596 int EVP_PKEY_CTX_get_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 597 {
 598     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 599             && ctx->op.kex.exchprovctx != NULL
 600             && ctx->op.kex.exchange != NULL
 601             && ctx->op.kex.exchange->get_ctx_params != NULL)
 602         return ctx->op.kex.exchange->get_ctx_params(ctx->op.kex.exchprovctx,
 603                                                     params);
 604     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 605             && ctx->op.sig.sigprovctx != NULL
 606             && ctx->op.sig.signature != NULL
 607             && ctx->op.sig.signature->get_ctx_params != NULL)
 608         return ctx->op.sig.signature->get_ctx_params(ctx->op.sig.sigprovctx,
 609                                                      params);
 610     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 611             && ctx->op.ciph.ciphprovctx != NULL
 612             && ctx->op.ciph.cipher != NULL
 613             && ctx->op.ciph.cipher->get_ctx_params != NULL)
 614         return ctx->op.ciph.cipher->get_ctx_params(ctx->op.ciph.ciphprovctx,
 615                                                    params);
 616     if (EVP_PKEY_CTX_IS_GEN_OP(ctx)
 617         && ctx->op.keymgmt.genctx != NULL
 618         && ctx->keymgmt != NULL
 619         && ctx->keymgmt->gen_get_params != NULL)
 620         return evp_keymgmt_gen_get_params(ctx->keymgmt, ctx->op.keymgmt.genctx,
 621                                           params);
 622     return 0;
 623 }
 624
 625 const OSSL_PARAM *EVP_PKEY_CTX_gettable_params(EVP_PKEY_CTX *ctx)
 626 {
 627     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 628             && ctx->op.kex.exchange != NULL
 629             && ctx->op.kex.exchange->gettable_ctx_params != NULL)
 630         return ctx->op.kex.exchange->gettable_ctx_params();
 631     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 632             && ctx->op.sig.signature != NULL
 633             && ctx->op.sig.signature->gettable_ctx_params != NULL)
 634         return ctx->op.sig.signature->gettable_ctx_params();
 635
 636     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 637             && ctx->op.ciph.cipher != NULL
 638             && ctx->op.ciph.cipher->gettable_ctx_params != NULL)
 639         return ctx->op.ciph.cipher->gettable_ctx_params();
 640
 641     return NULL;
 642 }
 643
 644 const OSSL_PARAM *EVP_PKEY_CTX_settable_params(EVP_PKEY_CTX *ctx)
 645 {
 646     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 647             && ctx->op.kex.exchange != NULL
 648             && ctx->op.kex.exchange->settable_ctx_params != NULL)
 649         return ctx->op.kex.exchange->settable_ctx_params();
 650     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 651             && ctx->op.sig.signature != NULL
 652             && ctx->op.sig.signature->settable_ctx_params != NULL)
 653         return ctx->op.sig.signature->settable_ctx_params();
 654     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 655             && ctx->op.ciph.cipher != NULL
 656             && ctx->op.ciph.cipher->settable_ctx_params != NULL)
 657         return ctx->op.ciph.cipher->settable_ctx_params();
 658     if (EVP_PKEY_CTX_IS_GEN_OP(ctx)
 659             && ctx->keymgmt != NULL
 660             && ctx->keymgmt->gen_settable_params != NULL)
 661         return evp_keymgmt_gen_settable_params(ctx->keymgmt);
 662
 663     return NULL;
 664 }
 665
 666 /*
 667  * Internal helpers for stricter EVP_PKEY_CTX_{set,get}_params().
 668  *
 669  * Return 1 on success, 0 or negative for errors.
 670  *
 671  * In particular they return -2 if any of the params is not supported.
 672  *
 673  * They are not available in FIPS_MODE as they depend on
 674  *      - EVP_PKEY_CTX_{get,set}_params()
 675  *      - EVP_PKEY_CTX_{gettable,settable}_params()
 676  *
 677  */
 678 int evp_pkey_ctx_set_params_strict(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 679 {
 680     const OSSL_PARAM *p;
 681
 682     if (ctx == NULL || params == NULL)
 683         return 0;
 684
 685     for (p = params; p->key != NULL; p++) {
 686         /* Check the ctx actually understands this parameter */
 687         if (OSSL_PARAM_locate_const(EVP_PKEY_CTX_settable_params(ctx),
 688                                     p->key) == NULL )
 689             return -2;
 690     }
 691
 692     return EVP_PKEY_CTX_set_params(ctx, params);
 693 }
 694
 695 int evp_pkey_ctx_get_params_strict(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 696 {
 697     const OSSL_PARAM *p;
 698
 699     if (ctx == NULL || params == NULL)
 700         return 0;
 701
 702     for (p = params; p->key != NULL; p++ ) {
 703         /* Check the ctx actually understands this parameter */
 704         if (OSSL_PARAM_locate_const(EVP_PKEY_CTX_gettable_params(ctx),
 705                                     p->key) == NULL )
 706             return -2;
 707     }
 708
 709     return EVP_PKEY_CTX_get_params(ctx, params);
 710 }
 711
 712 # ifndef OPENSSL_NO_DH
 713 int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad)
 714 {
 715     OSSL_PARAM dh_pad_params[2];
 716     unsigned int upad = pad;
 717
 718     /* We use EVP_PKEY_CTX_ctrl return values */
 719     if (ctx == NULL || !EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 720         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 721         return -2;
 722     }
 723
 724     /* TODO(3.0): Remove this eventually when no more legacy */
 725     if (ctx->op.kex.exchprovctx == NULL)
 726         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_DERIVE,
 727                                  EVP_PKEY_CTRL_DH_PAD, pad, NULL);
 728
 729     dh_pad_params[0] = OSSL_PARAM_construct_uint(OSSL_EXCHANGE_PARAM_PAD, &upad);
 730     dh_pad_params[1] = OSSL_PARAM_construct_end();
 731
 732     return EVP_PKEY_CTX_set_params(ctx, dh_pad_params);
 733 }
 734 # endif
 735
 736 int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **md)
 737 {
 738     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 739     /* 80 should be big enough */
 740     char name[80] = "";
 741     const EVP_MD *tmp;
 742
 743     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 744         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 745         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 746         return -2;
 747     }
 748
 749     /* TODO(3.0): Remove this eventually when no more legacy */
 750     if (ctx->op.sig.sigprovctx == NULL)
 751         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 752                                  EVP_PKEY_CTRL_GET_MD, 0, (void *)(md));
 753
 754     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 755                                             name,
 756                                             sizeof(name));
 757     *p++ = OSSL_PARAM_construct_end();
 758
 759     if (!EVP_PKEY_CTX_get_params(ctx, sig_md_params))
 760         return 0;
 761
 762     tmp = evp_get_digestbyname_ex(ctx->libctx, name);
 763     if (tmp == NULL)
 764         return 0;
 765
 766     *md = tmp;
 767
 768     return 1;
 769 }
 770
 771 int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
 772 {
 773     OSSL_PARAM sig_md_params[2], *p = sig_md_params;
 774     const char *name;
 775
 776     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 777         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 778         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 779         return -2;
 780     }
 781
 782     /* TODO(3.0): Remove this eventually when no more legacy */
 783     if (ctx->op.sig.sigprovctx == NULL)
 784         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 785                                  EVP_PKEY_CTRL_MD, 0, (void *)(md));
 786
 787     if (md == NULL) {
 788         name = "";
 789     } else {
 790         name = EVP_MD_name(md);
 791     }
 792
 793     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 794                                             /*
 795                                              * Cast away the const. This is read
 796                                              * only so should be safe
 797                                              */
 798                                             (char *)name, 0);
 799     *p++ = OSSL_PARAM_construct_end();
 800
 801     return EVP_PKEY_CTX_set_params(ctx, sig_md_params);
 802 }
 803
 804 static int legacy_ctrl_to_param(EVP_PKEY_CTX *ctx, int keytype, int optype,
 805                                 int cmd, int p1, void *p2)
 806 {
 807     /*
 808      * GOST CMS format is different for different cipher algorithms.
 809      * Most of other algorithms don't have such a difference
 810      * so this ctrl is just ignored.
 811      */
 812     if (cmd == EVP_PKEY_CTRL_CIPHER)
 813         return -2;
 814
 815 # ifndef OPENSSL_NO_DH
 816     if (keytype == EVP_PKEY_DH) {
 817         switch (cmd) {
 818             case EVP_PKEY_CTRL_DH_PAD:
 819                 return EVP_PKEY_CTX_set_dh_pad(ctx, p1);
 820             case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN:
 821                 return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, p1);
 822             case EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN:
 823                 return EVP_PKEY_CTX_set_dh_paramgen_subprime_len(ctx, p1);
 824             case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
 825                 return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, p1);
 826             case EVP_PKEY_CTRL_DH_PARAMGEN_TYPE:
 827                 return EVP_PKEY_CTX_set_dh_paramgen_type(ctx, p1);
 828             case EVP_PKEY_CTRL_DH_RFC5114:
 829                 return EVP_PKEY_CTX_set_dh_rfc5114(ctx, p1);
 830         }
 831     }
 832 # endif
 833 # ifndef OPENSSL_NO_DSA
 834     if (keytype == EVP_PKEY_DSA) {
 835         switch (cmd) {
 836         case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS:
 837             return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, p1);
 838         case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS:
 839             return EVP_PKEY_CTX_set_dsa_paramgen_q_bits(ctx, p1);
 840         case EVP_PKEY_CTRL_DSA_PARAMGEN_MD:
 841             return EVP_PKEY_CTX_set_dsa_paramgen_md(ctx, p2);
 842         }
 843     }
 844 # endif
 845 # ifndef OPENSSL_NO_EC
 846     if (keytype == EVP_PKEY_EC) {
 847         switch (cmd) {
 848         case EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID:
 849             return EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, p1);
 850         case EVP_PKEY_CTRL_EC_ECDH_COFACTOR:
 851             if (p1 == -2) {
 852                 return EVP_PKEY_CTX_get_ecdh_cofactor_mode(ctx);
 853             } else if (p1 < -1 || p1 > 1) {
 854                 /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 855                 return -2;
 856             } else {
 857                 return EVP_PKEY_CTX_set_ecdh_cofactor_mode(ctx, p1);
 858             }
 859         case EVP_PKEY_CTRL_EC_KDF_TYPE:
 860             if (p1 == -2) {
 861                 return EVP_PKEY_CTX_get_ecdh_kdf_type(ctx);
 862             } else {
 863                 return EVP_PKEY_CTX_set_ecdh_kdf_type(ctx, p1);
 864             }
 865         case EVP_PKEY_CTRL_GET_EC_KDF_MD:
 866             return EVP_PKEY_CTX_get_ecdh_kdf_md(ctx, p2);
 867         case EVP_PKEY_CTRL_EC_KDF_MD:
 868             return EVP_PKEY_CTX_set_ecdh_kdf_md(ctx, p2);
 869         case EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN:
 870             return EVP_PKEY_CTX_get_ecdh_kdf_outlen(ctx, p2);
 871         case EVP_PKEY_CTRL_EC_KDF_OUTLEN:
 872             return EVP_PKEY_CTX_set_ecdh_kdf_outlen(ctx, p1);
 873         case EVP_PKEY_CTRL_GET_EC_KDF_UKM:
 874             return EVP_PKEY_CTX_get0_ecdh_kdf_ukm(ctx, p2);
 875         case EVP_PKEY_CTRL_EC_KDF_UKM:
 876             return EVP_PKEY_CTX_set0_ecdh_kdf_ukm(ctx, p2, p1);
 877         }
 878     }
 879 # endif
 880     if (keytype == EVP_PKEY_RSA) {
 881         switch (cmd) {
 882         case EVP_PKEY_CTRL_RSA_OAEP_MD:
 883             return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, p2);
 884         case EVP_PKEY_CTRL_GET_RSA_OAEP_MD:
 885             return EVP_PKEY_CTX_get_rsa_oaep_md(ctx, p2);
 886         case EVP_PKEY_CTRL_RSA_MGF1_MD:
 887             return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, p2);
 888         case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
 889             return EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, p2, p1);
 890         case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL:
 891             return EVP_PKEY_CTX_get0_rsa_oaep_label(ctx, (unsigned char **)p2);
 892         case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
 893             return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, p1);
 894         case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
 895             return EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, p2);
 896         case EVP_PKEY_CTRL_RSA_KEYGEN_PRIMES:
 897             return EVP_PKEY_CTX_set_rsa_keygen_primes(ctx, p1);
 898         }
 899     }
 900     /*
 901      * keytype == -1 is used when several key types share the same structure,
 902      * or for generic controls that are the same across multiple key types.
 903      */
 904     if (keytype == -1) {
 905         switch (cmd) {
 906         case EVP_PKEY_CTRL_MD:
 907             return EVP_PKEY_CTX_set_signature_md(ctx, p2);
 908         case EVP_PKEY_CTRL_GET_MD:
 909             return EVP_PKEY_CTX_get_signature_md(ctx, p2);
 910         case EVP_PKEY_CTRL_RSA_PADDING:
 911             return EVP_PKEY_CTX_set_rsa_padding(ctx, p1);
 912         case EVP_PKEY_CTRL_GET_RSA_PADDING:
 913             return EVP_PKEY_CTX_get_rsa_padding(ctx, p2);
 914         case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
 915             return EVP_PKEY_CTX_get_rsa_oaep_md(ctx, p2);
 916         case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
 917             return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, p1);
 918         case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
 919             return EVP_PKEY_CTX_get_rsa_pss_saltlen(ctx, p2);
 920         case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
 921         case EVP_PKEY_CTRL_PKCS7_DECRYPT:
 922 # ifndef OPENSSL_NO_CMS
 923         case EVP_PKEY_CTRL_CMS_DECRYPT:
 924         case EVP_PKEY_CTRL_CMS_ENCRYPT:
 925 # endif
 926             /* TODO (3.0) Temporary hack, this should probe */
 927             if (!EVP_PKEY_is_a(EVP_PKEY_CTX_get0_pkey(ctx), "RSASSA-PSS"))
 928                 return 1;
 929             ERR_raise(ERR_LIB_EVP,
 930                       EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 931             return -2;
 932         }
 933     }
 934     return 0;
 935 }
 936
 937 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 938                       int cmd, int p1, void *p2)
 939 {
 940     int ret;
 941
 942     if (ctx == NULL) {
 943         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 944         return -2;
 945     }
 946
 947     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 948             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 949                 && ctx->op.sig.sigprovctx != NULL)
 950             || (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 951                 && ctx->op.ciph.ciphprovctx != NULL)
 952             || (EVP_PKEY_CTX_IS_GEN_OP(ctx)
 953                 && ctx->op.keymgmt.genctx != NULL))
 954         return legacy_ctrl_to_param(ctx, keytype, optype, cmd, p1, p2);
 955
 956     if (ctx->pmeth == NULL || ctx->pmeth->ctrl == NULL) {
 957         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 958         return -2;
 959     }
 960     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 961         return -1;
 962
 963     /* Skip the operation checks since this is called in a very early stage */
 964     if (ctx->pmeth->digest_custom != NULL)
 965         goto doit;
 966
 967     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 968         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 969         return -1;
 970     }
 971
 972     if ((optype != -1) && !(ctx->operation & optype)) {
 973         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 974         return -1;
 975     }
 976
 977  doit:
 978     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 979
 980     if (ret == -2)
 981         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 982
 983     return ret;
 984 }
 985
 986 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 987                              int cmd, uint64_t value)
 988 {
 989     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 990 }
 991
 992 static int legacy_ctrl_str_to_param(EVP_PKEY_CTX *ctx, const char *name,
 993                                     const char *value)
 994 {
 995
 996     /* Special cases that we intercept */
 997 # ifndef OPENSSL_NO_EC
 998     /*
 999      * We don't support encoding settings for providers, i.e. the only
1000      * possible encoding is "named_curve", so we simply fail when something
1001      * else is given, and otherwise just pretend all is fine.
1002      */
1003     if (strcmp(name, "ec_param_enc") == 0) {
1004         if (strcmp(value, "named_curve") == 0) {
1005             return 1;
1006         } else {
1007             ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1008             return -2;
1009         }
1010     }
1011 # endif
1012
1013     if (strcmp(name, "rsa_padding_mode") == 0)
1014         name = OSSL_ASYM_CIPHER_PARAM_PAD_MODE;
1015     else if (strcmp(name, "rsa_mgf1_md") == 0)
1016         name = OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST;
1017     else if (strcmp(name, "rsa_oaep_md") == 0)
1018         name = OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST;
1019     else if (strcmp(name, "rsa_oaep_label") == 0)
1020         name = OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL;
1021     else if (strcmp(name, "rsa_pss_saltlen") == 0)
1022         name = OSSL_SIGNATURE_PARAM_PSS_SALTLEN;
1023     else if (strcmp(name, "rsa_keygen_bits") == 0)
1024         name = OSSL_PKEY_PARAM_RSA_BITS;
1025     else if (strcmp(name, "rsa_keygen_pubexp") == 0)
1026         name = OSSL_PKEY_PARAM_RSA_E;
1027     else if (strcmp(name, "rsa_keygen_primes") == 0)
1028         name = OSSL_PKEY_PARAM_RSA_PRIMES;
1029 # ifndef OPENSSL_NO_DSA
1030     else if (strcmp(name, "dsa_paramgen_bits") == 0)
1031         name = OSSL_PKEY_PARAM_FFC_PBITS;
1032     else if (strcmp(name, "dsa_paramgen_q_bits") == 0)
1033         name = OSSL_PKEY_PARAM_FFC_QBITS;
1034     else if (strcmp(name, "dsa_paramgen_md") == 0)
1035         name = OSSL_PKEY_PARAM_FFC_DIGEST;
1036 # endif
1037 # ifndef OPENSSL_NO_DH
1038     else if (strcmp(name, "dh_paramgen_generator") == 0)
1039         name = OSSL_PKEY_PARAM_FFC_GENERATOR;
1040     else if (strcmp(name, "dh_paramgen_prime_len") == 0)
1041         name = OSSL_PKEY_PARAM_FFC_PBITS;
1042     else if (strcmp(name, "dh_paramgen_subprime_len") == 0)
1043         name = OSSL_PKEY_PARAM_FFC_QBITS;
1044     else if (strcmp(name, "dh_paramgen_type") == 0) {
1045         name = OSSL_PKEY_PARAM_FFC_TYPE;
1046         value = dh_gen_type_id2name(atoi(value));
1047     } else if (strcmp(name, "dh_param") == 0)
1048         name = OSSL_PKEY_PARAM_FFC_GROUP;
1049     else if (strcmp(name, "dh_rfc5114") == 0) {
1050         name = OSSL_PKEY_PARAM_FFC_GROUP;
1051         value = ffc_named_group_from_uid(atoi(value));
1052     } else if (strcmp(name, "dh_pad") == 0)
1053         name = OSSL_EXCHANGE_PARAM_PAD;
1054 # endif
1055 # ifndef OPENSSL_NO_EC
1056     else if (strcmp(name, "ec_paramgen_curve") == 0)
1057         name = OSSL_PKEY_PARAM_EC_NAME;
1058     else if (strcmp(name, "ecdh_cofactor_mode") == 0)
1059         name = OSSL_EXCHANGE_PARAM_EC_ECDH_COFACTOR_MODE;
1060     else if (strcmp(name, "ecdh_kdf_md") == 0)
1061         name = OSSL_EXCHANGE_PARAM_KDF_DIGEST;
1062 # endif
1063
1064     {
1065         /*
1066          * TODO(3.0) reduce the code above to only translate known legacy
1067          * string to the corresponding core name (see core_names.h), but
1068          * otherwise leave it to this code block to do the actual work.
1069          */
1070         const OSSL_PARAM *settable = EVP_PKEY_CTX_settable_params(ctx);
1071         OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1072         int rv = 0;
1073         int exists = 0;
1074
1075         if (!OSSL_PARAM_allocate_from_text(&params[0], settable, name, value,
1076                                            strlen(value), &exists)) {
1077             if (!exists) {
1078                 ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1079                 return -2;
1080             }
1081             return 0;
1082         }
1083         if (EVP_PKEY_CTX_set_params(ctx, params))
1084             rv = 1;
1085         OPENSSL_free(params[0].data);
1086         return rv;
1087     }
1088 }
1089
1090 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
1091                           const char *name, const char *value)
1092 {
1093     if (ctx == NULL) {
1094         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
1095         return -2;
1096     }
1097
1098     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
1099             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
1100                 && ctx->op.sig.sigprovctx != NULL)
1101             || (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
1102                 && ctx->op.ciph.ciphprovctx != NULL)
1103             || (EVP_PKEY_CTX_IS_GEN_OP(ctx)
1104                 && ctx->op.keymgmt.genctx != NULL))
1105         return legacy_ctrl_str_to_param(ctx, name, value);
1106
1107     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
1108         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
1109         return -2;
1110     }
1111     if (strcmp(name, "digest") == 0)
1112         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
1113                                value);
1114     return ctx->pmeth->ctrl_str(ctx, name, value);
1115 }
1116
1117 /* Utility functions to send a string of hex string to a ctrl */
1118
1119 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
1120 {
1121     size_t len;
1122
1123     len = strlen(str);
1124     if (len > INT_MAX)
1125         return -1;
1126     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
1127 }
1128
1129 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
1130 {
1131     unsigned char *bin;
1132     long binlen;
1133     int rv = -1;
1134
1135     bin = OPENSSL_hexstr2buf(hex, &binlen);
1136     if (bin == NULL)
1137         return 0;
1138     if (binlen <= INT_MAX)
1139         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
1140     OPENSSL_free(bin);
1141     return rv;
1142 }
1143
1144 /* Pass a message digest to a ctrl */
1145 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
1146 {
1147     const EVP_MD *m;
1148
1149     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
1150         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
1151         return 0;
1152     }
1153     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
1154 }
1155
1156 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
1157 {
1158     return ctx->operation;
1159 }
1160
1161 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
1162 {
1163     ctx->keygen_info = dat;
1164     ctx->keygen_info_count = datlen;
1165 }
1166
1167 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
1168 {
1169     ctx->data = data;
1170 }
1171
1172 void *EVP_PKEY_CTX_get_data(const EVP_PKEY_CTX *ctx)
1173 {
1174     return ctx->data;
1175 }
1176
1177 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
1178 {
1179     return ctx->pkey;
1180 }
1181
1182 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
1183 {
1184     return ctx->peerkey;
1185 }
1186
1187 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
1188 {
1189     ctx->app_data = data;
1190 }
1191
1192 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
1193 {
1194     return ctx->app_data;
1195 }
1196
1197 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
1198                             int (*init) (EVP_PKEY_CTX *ctx))
1199 {
1200     pmeth->init = init;
1201 }
1202
1203 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
1204                             int (*copy) (EVP_PKEY_CTX *dst,
1205                                          const EVP_PKEY_CTX *src))
1206 {
1207     pmeth->copy = copy;
1208 }
1209
1210 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
1211                                void (*cleanup) (EVP_PKEY_CTX *ctx))
1212 {
1213     pmeth->cleanup = cleanup;
1214 }
1215
1216 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
1217                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
1218                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
1219                                                  EVP_PKEY *pkey))
1220 {
1221     pmeth->paramgen_init = paramgen_init;
1222     pmeth->paramgen = paramgen;
1223 }
1224
1225 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
1226                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
1227                               int (*keygen) (EVP_PKEY_CTX *ctx,
1228                                              EVP_PKEY *pkey))
1229 {
1230     pmeth->keygen_init = keygen_init;
1231     pmeth->keygen = keygen;
1232 }
1233
1234 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
1235                             int (*sign_init) (EVP_PKEY_CTX *ctx),
1236                             int (*sign) (EVP_PKEY_CTX *ctx,
1237                                          unsigned char *sig, size_t *siglen,
1238                                          const unsigned char *tbs,
1239                                          size_t tbslen))
1240 {
1241     pmeth->sign_init = sign_init;
1242     pmeth->sign = sign;
1243 }
1244
1245 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
1246                               int (*verify_init) (EVP_PKEY_CTX *ctx),
1247                               int (*verify) (EVP_PKEY_CTX *ctx,
1248                                              const unsigned char *sig,
1249                                              size_t siglen,
1250                                              const unsigned char *tbs,
1251                                              size_t tbslen))
1252 {
1253     pmeth->verify_init = verify_init;
1254     pmeth->verify = verify;
1255 }
1256
1257 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
1258                                       int (*verify_recover_init) (EVP_PKEY_CTX
1259                                                                   *ctx),
1260                                       int (*verify_recover) (EVP_PKEY_CTX
1261                                                              *ctx,
1262                                                              unsigned char
1263                                                              *sig,
1264                                                              size_t *siglen,
1265                                                              const unsigned
1266                                                              char *tbs,
1267                                                              size_t tbslen))
1268 {
1269     pmeth->verify_recover_init = verify_recover_init;
1270     pmeth->verify_recover = verify_recover;
1271 }
1272
1273 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
1274                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
1275                                                     EVP_MD_CTX *mctx),
1276                                int (*signctx) (EVP_PKEY_CTX *ctx,
1277                                                unsigned char *sig,
1278                                                size_t *siglen,
1279                                                EVP_MD_CTX *mctx))
1280 {
1281     pmeth->signctx_init = signctx_init;
1282     pmeth->signctx = signctx;
1283 }
1284
1285 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
1286                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
1287                                                         EVP_MD_CTX *mctx),
1288                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
1289                                                    const unsigned char *sig,
1290                                                    int siglen,
1291                                                    EVP_MD_CTX *mctx))
1292 {
1293     pmeth->verifyctx_init = verifyctx_init;
1294     pmeth->verifyctx = verifyctx;
1295 }
1296
1297 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
1298                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
1299                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
1300                                                  unsigned char *out,
1301                                                  size_t *outlen,
1302                                                  const unsigned char *in,
1303                                                  size_t inlen))
1304 {
1305     pmeth->encrypt_init = encrypt_init;
1306     pmeth->encrypt = encryptfn;
1307 }
1308
1309 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
1310                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
1311                                int (*decrypt) (EVP_PKEY_CTX *ctx,
1312                                                unsigned char *out,
1313                                                size_t *outlen,
1314                                                const unsigned char *in,
1315                                                size_t inlen))
1316 {
1317     pmeth->decrypt_init = decrypt_init;
1318     pmeth->decrypt = decrypt;
1319 }
1320
1321 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
1322                               int (*derive_init) (EVP_PKEY_CTX *ctx),
1323                               int (*derive) (EVP_PKEY_CTX *ctx,
1324                                              unsigned char *key,
1325                                              size_t *keylen))
1326 {
1327     pmeth->derive_init = derive_init;
1328     pmeth->derive = derive;
1329 }
1330
1331 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
1332                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1333                                          void *p2),
1334                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
1335                                              const char *type,
1336                                              const char *value))
1337 {
1338     pmeth->ctrl = ctrl;
1339     pmeth->ctrl_str = ctrl_str;
1340 }
1341
1342 void EVP_PKEY_meth_set_digestsign(EVP_PKEY_METHOD *pmeth,
1343     int (*digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
1344                        const unsigned char *tbs, size_t tbslen))
1345 {
1346     pmeth->digestsign = digestsign;
1347 }
1348
1349 void EVP_PKEY_meth_set_digestverify(EVP_PKEY_METHOD *pmeth,
1350     int (*digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
1351                          size_t siglen, const unsigned char *tbs,
1352                          size_t tbslen))
1353 {
1354     pmeth->digestverify = digestverify;
1355 }
1356
1357 void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
1358                              int (*check) (EVP_PKEY *pkey))
1359 {
1360     pmeth->check = check;
1361 }
1362
1363 void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
1364                                     int (*check) (EVP_PKEY *pkey))
1365 {
1366     pmeth->public_check = check;
1367 }
1368
1369 void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
1370                                    int (*check) (EVP_PKEY *pkey))
1371 {
1372     pmeth->param_check = check;
1373 }
1374
1375 void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
1376                                      int (*digest_custom) (EVP_PKEY_CTX *ctx,
1377                                                            EVP_MD_CTX *mctx))
1378 {
1379     pmeth->digest_custom = digest_custom;
1380 }
1381
1382 void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
1383                             int (**pinit) (EVP_PKEY_CTX *ctx))
1384 {
1385     *pinit = pmeth->init;
1386 }
1387
1388 void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
1389                             int (**pcopy) (EVP_PKEY_CTX *dst,
1390                                            const EVP_PKEY_CTX *src))
1391 {
1392     *pcopy = pmeth->copy;
1393 }
1394
1395 void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
1396                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
1397 {
1398     *pcleanup = pmeth->cleanup;
1399 }
1400
1401 void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
1402                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
1403                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
1404                                                    EVP_PKEY *pkey))
1405 {
1406     if (pparamgen_init)
1407         *pparamgen_init = pmeth->paramgen_init;
1408     if (pparamgen)
1409         *pparamgen = pmeth->paramgen;
1410 }
1411
1412 void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
1413                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
1414                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
1415                                                EVP_PKEY *pkey))
1416 {
1417     if (pkeygen_init)
1418         *pkeygen_init = pmeth->keygen_init;
1419     if (pkeygen)
1420         *pkeygen = pmeth->keygen;
1421 }
1422
1423 void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
1424                             int (**psign_init) (EVP_PKEY_CTX *ctx),
1425                             int (**psign) (EVP_PKEY_CTX *ctx,
1426                                            unsigned char *sig, size_t *siglen,
1427                                            const unsigned char *tbs,
1428                                            size_t tbslen))
1429 {
1430     if (psign_init)
1431         *psign_init = pmeth->sign_init;
1432     if (psign)
1433         *psign = pmeth->sign;
1434 }
1435
1436 void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
1437                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
1438                               int (**pverify) (EVP_PKEY_CTX *ctx,
1439                                                const unsigned char *sig,
1440                                                size_t siglen,
1441                                                const unsigned char *tbs,
1442                                                size_t tbslen))
1443 {
1444     if (pverify_init)
1445         *pverify_init = pmeth->verify_init;
1446     if (pverify)
1447         *pverify = pmeth->verify;
1448 }
1449
1450 void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
1451                                       int (**pverify_recover_init) (EVP_PKEY_CTX
1452                                                                     *ctx),
1453                                       int (**pverify_recover) (EVP_PKEY_CTX
1454                                                                *ctx,
1455                                                                unsigned char
1456                                                                *sig,
1457                                                                size_t *siglen,
1458                                                                const unsigned
1459                                                                char *tbs,
1460                                                                size_t tbslen))
1461 {
1462     if (pverify_recover_init)
1463         *pverify_recover_init = pmeth->verify_recover_init;
1464     if (pverify_recover)
1465         *pverify_recover = pmeth->verify_recover;
1466 }
1467
1468 void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
1469                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
1470                                                       EVP_MD_CTX *mctx),
1471                                int (**psignctx) (EVP_PKEY_CTX *ctx,
1472                                                  unsigned char *sig,
1473                                                  size_t *siglen,
1474                                                  EVP_MD_CTX *mctx))
1475 {
1476     if (psignctx_init)
1477         *psignctx_init = pmeth->signctx_init;
1478     if (psignctx)
1479         *psignctx = pmeth->signctx;
1480 }
1481
1482 void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
1483                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
1484                                                           EVP_MD_CTX *mctx),
1485                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
1486                                                      const unsigned char *sig,
1487                                                      int siglen,
1488                                                      EVP_MD_CTX *mctx))
1489 {
1490     if (pverifyctx_init)
1491         *pverifyctx_init = pmeth->verifyctx_init;
1492     if (pverifyctx)
1493         *pverifyctx = pmeth->verifyctx;
1494 }
1495
1496 void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
1497                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
1498                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
1499                                                    unsigned char *out,
1500                                                    size_t *outlen,
1501                                                    const unsigned char *in,
1502                                                    size_t inlen))
1503 {
1504     if (pencrypt_init)
1505         *pencrypt_init = pmeth->encrypt_init;
1506     if (pencryptfn)
1507         *pencryptfn = pmeth->encrypt;
1508 }
1509
1510 void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
1511                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
1512                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
1513                                                  unsigned char *out,
1514                                                  size_t *outlen,
1515                                                  const unsigned char *in,
1516                                                  size_t inlen))
1517 {
1518     if (pdecrypt_init)
1519         *pdecrypt_init = pmeth->decrypt_init;
1520     if (pdecrypt)
1521         *pdecrypt = pmeth->decrypt;
1522 }
1523
1524 void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
1525                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
1526                               int (**pderive) (EVP_PKEY_CTX *ctx,
1527                                                unsigned char *key,
1528                                                size_t *keylen))
1529 {
1530     if (pderive_init)
1531         *pderive_init = pmeth->derive_init;
1532     if (pderive)
1533         *pderive = pmeth->derive;
1534 }
1535
1536 void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
1537                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1538                                            void *p2),
1539                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
1540                                                const char *type,
1541                                                const char *value))
1542 {
1543     if (pctrl)
1544         *pctrl = pmeth->ctrl;
1545     if (pctrl_str)
1546         *pctrl_str = pmeth->ctrl_str;
1547 }
1548
1549 void EVP_PKEY_meth_get_digestsign(EVP_PKEY_METHOD *pmeth,
1550     int (**digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
1551                         const unsigned char *tbs, size_t tbslen))
1552 {
1553     if (digestsign)
1554         *digestsign = pmeth->digestsign;
1555 }
1556
1557 void EVP_PKEY_meth_get_digestverify(EVP_PKEY_METHOD *pmeth,
1558     int (**digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
1559                           size_t siglen, const unsigned char *tbs,
1560                           size_t tbslen))
1561 {
1562     if (digestverify)
1563         *digestverify = pmeth->digestverify;
1564 }
1565
1566 void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
1567                              int (**pcheck) (EVP_PKEY *pkey))
1568 {
1569     if (pcheck != NULL)
1570         *pcheck = pmeth->check;
1571 }
1572
1573 void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
1574                                     int (**pcheck) (EVP_PKEY *pkey))
1575 {
1576     if (pcheck != NULL)
1577         *pcheck = pmeth->public_check;
1578 }
1579
1580 void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
1581                                    int (**pcheck) (EVP_PKEY *pkey))
1582 {
1583     if (pcheck != NULL)
1584         *pcheck = pmeth->param_check;
1585 }
1586
1587 void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
1588                                      int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
1589                                                              EVP_MD_CTX *mctx))
1590 {
1591     if (pdigest_custom != NULL)
1592         *pdigest_custom = pmeth->digest_custom;
1593 }
1594
1595 #endif /* FIPS_MODE */