crypto/evp/pmeth_lib.c

   1 /*
   2  * Copyright 2006-2018 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 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
 240         ENGINE_finish(e);
 241 #endif
 242         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 243         return NULL;
 244     }
 245     ret->libctx = libctx;
 246     ret->propquery = propquery;
 247     ret->keytype = keytype;
 248     ret->keymgmt = keymgmt;
 249     ret->engine = e;
 250     ret->pmeth = pmeth;
 251     ret->operation = EVP_PKEY_OP_UNDEFINED;
 252     ret->pkey = pkey;
 253     if (pkey != NULL)
 254         EVP_PKEY_up_ref(pkey);
 255
 256     if (pmeth != NULL && pmeth->init != NULL) {
 257         if (pmeth->init(ret) <= 0) {
 258             ret->pmeth = NULL;
 259             EVP_PKEY_CTX_free(ret);
 260             return NULL;
 261         }
 262     }
 263
 264     return ret;
 265 }
 266
 267 /*- All methods below can also be used in FIPS_MODE */
 268
 269 EVP_PKEY_CTX *EVP_PKEY_CTX_new_from_name(OPENSSL_CTX *libctx,
 270                                          const char *name,
 271                                          const char *propquery)
 272 {
 273     return int_ctx_new(libctx, NULL, NULL, name, propquery, -1);
 274 }
 275
 276 EVP_PKEY_CTX *EVP_PKEY_CTX_new_from_pkey(OPENSSL_CTX *libctx, EVP_PKEY *pkey,
 277                                          const char *propquery)
 278 {
 279     return int_ctx_new(libctx, pkey, NULL, NULL, propquery, -1);
 280 }
 281
 282 void evp_pkey_ctx_free_old_ops(EVP_PKEY_CTX *ctx)
 283 {
 284     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 285         if (ctx->op.sig.sigprovctx != NULL && ctx->op.sig.signature != NULL)
 286             ctx->op.sig.signature->freectx(ctx->op.sig.sigprovctx);
 287         EVP_SIGNATURE_free(ctx->op.sig.signature);
 288         ctx->op.sig.sigprovctx = NULL;
 289         ctx->op.sig.signature = NULL;
 290     } else if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 291         if (ctx->op.kex.exchprovctx != NULL && ctx->op.kex.exchange != NULL)
 292             ctx->op.kex.exchange->freectx(ctx->op.kex.exchprovctx);
 293         EVP_KEYEXCH_free(ctx->op.kex.exchange);
 294         ctx->op.kex.exchprovctx = NULL;
 295         ctx->op.kex.exchange = NULL;
 296     }
 297 /* TODO(3.0): add dependancies and uncomment this when available for fips mode */
 298 #ifndef FIPS_MODE
 299     else if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) {
 300         if (ctx->op.ciph.ciphprovctx != NULL && ctx->op.ciph.cipher != NULL)
 301             ctx->op.ciph.cipher->freectx(ctx->op.ciph.ciphprovctx);
 302         EVP_ASYM_CIPHER_free(ctx->op.ciph.cipher);
 303         ctx->op.ciph.ciphprovctx = NULL;
 304         ctx->op.ciph.cipher = NULL;
 305     } else if (EVP_PKEY_CTX_IS_GEN_OP(ctx)) {
 306         if (ctx->op.keymgmt.genctx != NULL && ctx->keymgmt != NULL)
 307             evp_keymgmt_gen_cleanup(ctx->keymgmt, ctx->op.keymgmt.genctx);
 308     }
 309 #endif
 310 }
 311
 312 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 313 {
 314     if (ctx == NULL)
 315         return;
 316     if (ctx->pmeth && ctx->pmeth->cleanup)
 317         ctx->pmeth->cleanup(ctx);
 318
 319     evp_pkey_ctx_free_old_ops(ctx);
 320     EVP_KEYMGMT_free(ctx->keymgmt);
 321
 322     EVP_PKEY_free(ctx->pkey);
 323     EVP_PKEY_free(ctx->peerkey);
 324 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
 325     ENGINE_finish(ctx->engine);
 326 #endif
 327     OPENSSL_free(ctx);
 328 }
 329
 330 #ifndef FIPS_MODE
 331
 332 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 333                              const EVP_PKEY_METHOD *meth)
 334 {
 335     if (ppkey_id)
 336         *ppkey_id = meth->pkey_id;
 337     if (pflags)
 338         *pflags = meth->flags;
 339 }
 340
 341 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 342 {
 343
 344     dst->init = src->init;
 345     dst->copy = src->copy;
 346     dst->cleanup = src->cleanup;
 347
 348     dst->paramgen_init = src->paramgen_init;
 349     dst->paramgen = src->paramgen;
 350
 351     dst->keygen_init = src->keygen_init;
 352     dst->keygen = src->keygen;
 353
 354     dst->sign_init = src->sign_init;
 355     dst->sign = src->sign;
 356
 357     dst->verify_init = src->verify_init;
 358     dst->verify = src->verify;
 359
 360     dst->verify_recover_init = src->verify_recover_init;
 361     dst->verify_recover = src->verify_recover;
 362
 363     dst->signctx_init = src->signctx_init;
 364     dst->signctx = src->signctx;
 365
 366     dst->verifyctx_init = src->verifyctx_init;
 367     dst->verifyctx = src->verifyctx;
 368
 369     dst->encrypt_init = src->encrypt_init;
 370     dst->encrypt = src->encrypt;
 371
 372     dst->decrypt_init = src->decrypt_init;
 373     dst->decrypt = src->decrypt;
 374
 375     dst->derive_init = src->derive_init;
 376     dst->derive = src->derive;
 377
 378     dst->ctrl = src->ctrl;
 379     dst->ctrl_str = src->ctrl_str;
 380
 381     dst->check = src->check;
 382 }
 383
 384 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 385 {
 386     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 387         OPENSSL_free(pmeth);
 388 }
 389
 390 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 391 {
 392     return int_ctx_new(NULL, pkey, e, NULL, NULL, -1);
 393 }
 394
 395 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 396 {
 397     return int_ctx_new(NULL, NULL, e, NULL, NULL, id);
 398 }
 399
 400 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(const EVP_PKEY_CTX *pctx)
 401 {
 402     EVP_PKEY_CTX *rctx;
 403
 404     if (((pctx->pmeth == NULL) || (pctx->pmeth->copy == NULL))
 405             && ((EVP_PKEY_CTX_IS_DERIVE_OP(pctx)
 406                  && pctx->op.kex.exchprovctx == NULL)
 407                 || (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)
 408                     && pctx->op.sig.sigprovctx == NULL)))
 409         return NULL;
 410 # ifndef OPENSSL_NO_ENGINE
 411     /* Make sure it's safe to copy a pkey context using an ENGINE */
 412     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 413         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 414         return 0;
 415     }
 416 # endif
 417     rctx = OPENSSL_zalloc(sizeof(*rctx));
 418     if (rctx == NULL) {
 419         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_MALLOC_FAILURE);
 420         return NULL;
 421     }
 422
 423     if (pctx->pkey != NULL)
 424         EVP_PKEY_up_ref(pctx->pkey);
 425     rctx->pkey = pctx->pkey;
 426     rctx->operation = pctx->operation;
 427     rctx->libctx = pctx->libctx;
 428     rctx->keytype = pctx->keytype;
 429     rctx->propquery = pctx->propquery;
 430
 431     if (EVP_PKEY_CTX_IS_DERIVE_OP(pctx)) {
 432         if (pctx->op.kex.exchange != NULL) {
 433             rctx->op.kex.exchange = pctx->op.kex.exchange;
 434             if (!EVP_KEYEXCH_up_ref(rctx->op.kex.exchange)) {
 435                 OPENSSL_free(rctx);
 436                 return NULL;
 437             }
 438         }
 439         if (pctx->op.kex.exchprovctx != NULL) {
 440             if (!ossl_assert(pctx->op.kex.exchange != NULL))
 441                 return NULL;
 442             rctx->op.kex.exchprovctx
 443                 = pctx->op.kex.exchange->dupctx(pctx->op.kex.exchprovctx);
 444             if (rctx->op.kex.exchprovctx == NULL) {
 445                 EVP_KEYEXCH_free(rctx->op.kex.exchange);
 446                 OPENSSL_free(rctx);
 447                 return NULL;
 448             }
 449             return rctx;
 450         }
 451     } else if (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)) {
 452         if (pctx->op.sig.signature != NULL) {
 453             rctx->op.sig.signature = pctx->op.sig.signature;
 454             if (!EVP_SIGNATURE_up_ref(rctx->op.sig.signature)) {
 455                 OPENSSL_free(rctx);
 456                 return NULL;
 457             }
 458         }
 459         if (pctx->op.sig.sigprovctx != NULL) {
 460             if (!ossl_assert(pctx->op.sig.signature != NULL))
 461                 return NULL;
 462             rctx->op.sig.sigprovctx
 463                 = pctx->op.sig.signature->dupctx(pctx->op.sig.sigprovctx);
 464             if (rctx->op.sig.sigprovctx == NULL) {
 465                 EVP_SIGNATURE_free(rctx->op.sig.signature);
 466                 OPENSSL_free(rctx);
 467                 return NULL;
 468             }
 469             return rctx;
 470         }
 471     } else if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(pctx)) {
 472         if (pctx->op.ciph.cipher != NULL) {
 473             rctx->op.ciph.cipher = pctx->op.ciph.cipher;
 474             if (!EVP_ASYM_CIPHER_up_ref(rctx->op.ciph.cipher)) {
 475                 OPENSSL_free(rctx);
 476                 return NULL;
 477             }
 478         }
 479         if (pctx->op.ciph.ciphprovctx != NULL) {
 480             if (!ossl_assert(pctx->op.ciph.cipher != NULL))
 481                 return NULL;
 482             rctx->op.ciph.ciphprovctx
 483                 = pctx->op.ciph.cipher->dupctx(pctx->op.ciph.ciphprovctx);
 484             if (rctx->op.ciph.ciphprovctx == NULL) {
 485                 EVP_ASYM_CIPHER_free(rctx->op.ciph.cipher);
 486                 OPENSSL_free(rctx);
 487                 return NULL;
 488             }
 489             return rctx;
 490         }
 491     }
 492
 493     rctx->pmeth = pctx->pmeth;
 494 # ifndef OPENSSL_NO_ENGINE
 495     rctx->engine = pctx->engine;
 496 # endif
 497
 498     if (pctx->peerkey)
 499         EVP_PKEY_up_ref(pctx->peerkey);
 500     rctx->peerkey = pctx->peerkey;
 501
 502     if (pctx->pmeth->copy(rctx, pctx) > 0)
 503         return rctx;
 504
 505     rctx->pmeth = NULL;
 506     EVP_PKEY_CTX_free(rctx);
 507     return NULL;
 508
 509 }
 510
 511 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 512 {
 513     if (app_pkey_methods == NULL) {
 514         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 515         if (app_pkey_methods == NULL){
 516             EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 517             return 0;
 518         }
 519     }
 520     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth)) {
 521         EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 522         return 0;
 523     }
 524     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 525     return 1;
 526 }
 527
 528 void evp_app_cleanup_int(void)
 529 {
 530     if (app_pkey_methods != NULL)
 531         sk_EVP_PKEY_METHOD_pop_free(app_pkey_methods, EVP_PKEY_meth_free);
 532 }
 533
 534 int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth)
 535 {
 536     const EVP_PKEY_METHOD *ret;
 537
 538     ret = sk_EVP_PKEY_METHOD_delete_ptr(app_pkey_methods, pmeth);
 539
 540     return ret == NULL ? 0 : 1;
 541 }
 542
 543 size_t EVP_PKEY_meth_get_count(void)
 544 {
 545     size_t rv = OSSL_NELEM(standard_methods);
 546
 547     if (app_pkey_methods)
 548         rv += sk_EVP_PKEY_METHOD_num(app_pkey_methods);
 549     return rv;
 550 }
 551
 552 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx)
 553 {
 554     if (idx < OSSL_NELEM(standard_methods))
 555         return (standard_methods[idx])();
 556     if (app_pkey_methods == NULL)
 557         return NULL;
 558     idx -= OSSL_NELEM(standard_methods);
 559     if (idx >= (size_t)sk_EVP_PKEY_METHOD_num(app_pkey_methods))
 560         return NULL;
 561     return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 562 }
 563 #endif
 564
 565 int EVP_PKEY_CTX_set_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 566 {
 567     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 568             && ctx->op.kex.exchprovctx != NULL
 569             && ctx->op.kex.exchange != NULL
 570             && ctx->op.kex.exchange->set_ctx_params != NULL)
 571         return ctx->op.kex.exchange->set_ctx_params(ctx->op.kex.exchprovctx,
 572                                                     params);
 573     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 574             && ctx->op.sig.sigprovctx != NULL
 575             && ctx->op.sig.signature != NULL
 576             && ctx->op.sig.signature->set_ctx_params != NULL)
 577         return ctx->op.sig.signature->set_ctx_params(ctx->op.sig.sigprovctx,
 578                                                      params);
 579     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 580             && ctx->op.ciph.ciphprovctx != NULL
 581             && ctx->op.ciph.cipher != NULL
 582             && ctx->op.ciph.cipher->set_ctx_params != NULL)
 583         return ctx->op.ciph.cipher->set_ctx_params(ctx->op.ciph.ciphprovctx,
 584                                                      params);
 585     if (EVP_PKEY_CTX_IS_GEN_OP(ctx)
 586         && ctx->op.keymgmt.genctx != NULL
 587         && ctx->keymgmt != NULL
 588         && ctx->keymgmt->gen_set_params != NULL)
 589         return evp_keymgmt_gen_set_params(ctx->keymgmt, ctx->op.keymgmt.genctx,
 590                                           params);
 591     return 0;
 592 }
 593
 594 #ifndef FIPS_MODE
 595 int EVP_PKEY_CTX_get_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 596 {
 597     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 598             && ctx->op.kex.exchprovctx != NULL
 599             && ctx->op.kex.exchange != NULL
 600             && ctx->op.kex.exchange->get_ctx_params != NULL)
 601         return ctx->op.kex.exchange->get_ctx_params(ctx->op.kex.exchprovctx,
 602                                                     params);
 603     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 604             && ctx->op.sig.sigprovctx != NULL
 605             && ctx->op.sig.signature != NULL
 606             && ctx->op.sig.signature->get_ctx_params != NULL)
 607         return ctx->op.sig.signature->get_ctx_params(ctx->op.sig.sigprovctx,
 608                                                      params);
 609     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 610             && ctx->op.ciph.ciphprovctx != NULL
 611             && ctx->op.ciph.cipher != NULL
 612             && ctx->op.ciph.cipher->get_ctx_params != NULL)
 613         return ctx->op.ciph.cipher->get_ctx_params(ctx->op.ciph.ciphprovctx,
 614                                                    params);
 615     if (EVP_PKEY_CTX_IS_GEN_OP(ctx)
 616         && ctx->op.keymgmt.genctx != NULL
 617         && ctx->keymgmt != NULL
 618         && ctx->keymgmt->gen_get_params != NULL)
 619         return evp_keymgmt_gen_get_params(ctx->keymgmt, ctx->op.keymgmt.genctx,
 620                                           params);
 621     return 0;
 622 }
 623
 624 const OSSL_PARAM *EVP_PKEY_CTX_gettable_params(EVP_PKEY_CTX *ctx)
 625 {
 626     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 627             && ctx->op.kex.exchange != NULL
 628             && ctx->op.kex.exchange->gettable_ctx_params != NULL)
 629         return ctx->op.kex.exchange->gettable_ctx_params();
 630     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 631             && ctx->op.sig.signature != NULL
 632             && ctx->op.sig.signature->gettable_ctx_params != NULL)
 633         return ctx->op.sig.signature->gettable_ctx_params();
 634
 635     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 636             && ctx->op.ciph.cipher != NULL
 637             && ctx->op.ciph.cipher->gettable_ctx_params != NULL)
 638         return ctx->op.ciph.cipher->gettable_ctx_params();
 639
 640     return NULL;
 641 }
 642
 643 const OSSL_PARAM *EVP_PKEY_CTX_settable_params(EVP_PKEY_CTX *ctx)
 644 {
 645     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 646             && ctx->op.kex.exchange != NULL
 647             && ctx->op.kex.exchange->settable_ctx_params != NULL)
 648         return ctx->op.kex.exchange->settable_ctx_params();
 649     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 650             && ctx->op.sig.signature != NULL
 651             && ctx->op.sig.signature->settable_ctx_params != NULL)
 652         return ctx->op.sig.signature->settable_ctx_params();
 653     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 654             && ctx->op.ciph.cipher != NULL
 655             && ctx->op.ciph.cipher->settable_ctx_params != NULL)
 656         return ctx->op.ciph.cipher->settable_ctx_params();
 657     if (EVP_PKEY_CTX_IS_GEN_OP(ctx)
 658             && ctx->keymgmt != NULL
 659             && ctx->keymgmt->gen_settable_params != NULL)
 660         return evp_keymgmt_gen_settable_params(ctx->keymgmt);
 661
 662     return NULL;
 663 }
 664
 665 /*
 666  * Internal helpers for stricter EVP_PKEY_CTX_{set,get}_params().
 667  *
 668  * Return 1 on success, 0 or negative for errors.
 669  *
 670  * In particular they return -2 if any of the params is not supported.
 671  *
 672  * They are not available in FIPS_MODE as they depend on
 673  *      - EVP_PKEY_CTX_{get,set}_params()
 674  *      - EVP_PKEY_CTX_{gettable,settable}_params()
 675  *
 676  */
 677 int evp_pkey_ctx_set_params_strict(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 678 {
 679     const OSSL_PARAM *p;
 680
 681     if (ctx == NULL || params == NULL)
 682         return 0;
 683
 684     for (p = params; p->key != NULL; p++) {
 685         /* Check the ctx actually understands this parameter */
 686         if (OSSL_PARAM_locate_const(EVP_PKEY_CTX_settable_params(ctx),
 687                                     p->key) == NULL )
 688             return -2;
 689     }
 690
 691     return EVP_PKEY_CTX_set_params(ctx, params);
 692 }
 693
 694 int evp_pkey_ctx_get_params_strict(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 695 {
 696     const OSSL_PARAM *p;
 697
 698     if (ctx == NULL || params == NULL)
 699         return 0;
 700
 701     for (p = params; p->key != NULL; p++ ) {
 702         /* Check the ctx actually understands this parameter */
 703         if (OSSL_PARAM_locate_const(EVP_PKEY_CTX_gettable_params(ctx),
 704                                     p->key) == NULL )
 705             return -2;
 706     }
 707
 708     return EVP_PKEY_CTX_get_params(ctx, params);
 709 }
 710
 711 # ifndef OPENSSL_NO_DH
 712 int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad)
 713 {
 714     OSSL_PARAM dh_pad_params[2];
 715     unsigned int upad = pad;
 716
 717     /* We use EVP_PKEY_CTX_ctrl return values */
 718     if (ctx == NULL || !EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 719         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 720         return -2;
 721     }
 722
 723     /* TODO(3.0): Remove this eventually when no more legacy */
 724     if (ctx->op.kex.exchprovctx == NULL)
 725         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_DERIVE,
 726                                  EVP_PKEY_CTRL_DH_PAD, pad, NULL);
 727
 728     dh_pad_params[0] = OSSL_PARAM_construct_uint(OSSL_EXCHANGE_PARAM_PAD, &upad);
 729     dh_pad_params[1] = OSSL_PARAM_construct_end();
 730
 731     return EVP_PKEY_CTX_set_params(ctx, dh_pad_params);
 732 }
 733 # endif
 734
 735 int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **md)
 736 {
 737     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 738     /* 80 should be big enough */
 739     char name[80] = "";
 740     const EVP_MD *tmp;
 741
 742     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 743         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 744         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 745         return -2;
 746     }
 747
 748     /* TODO(3.0): Remove this eventually when no more legacy */
 749     if (ctx->op.sig.sigprovctx == NULL)
 750         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 751                                  EVP_PKEY_CTRL_GET_MD, 0, (void *)(md));
 752
 753     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 754                                             name,
 755                                             sizeof(name));
 756     *p++ = OSSL_PARAM_construct_end();
 757
 758     if (!EVP_PKEY_CTX_get_params(ctx, sig_md_params))
 759         return 0;
 760
 761     tmp = evp_get_digestbyname_ex(ctx->libctx, name);
 762     if (tmp == NULL)
 763         return 0;
 764
 765     *md = tmp;
 766
 767     return 1;
 768 }
 769
 770 int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
 771 {
 772     OSSL_PARAM sig_md_params[2], *p = sig_md_params;
 773     const char *name;
 774
 775     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 776         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 777         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 778         return -2;
 779     }
 780
 781     /* TODO(3.0): Remove this eventually when no more legacy */
 782     if (ctx->op.sig.sigprovctx == NULL)
 783         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 784                                  EVP_PKEY_CTRL_MD, 0, (void *)(md));
 785
 786     if (md == NULL) {
 787         name = "";
 788     } else {
 789         name = EVP_MD_name(md);
 790     }
 791
 792     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 793                                             /*
 794                                              * Cast away the const. This is read
 795                                              * only so should be safe
 796                                              */
 797                                             (char *)name, 0);
 798     *p++ = OSSL_PARAM_construct_end();
 799
 800     return EVP_PKEY_CTX_set_params(ctx, sig_md_params);
 801 }
 802
 803 static int legacy_ctrl_to_param(EVP_PKEY_CTX *ctx, int keytype, int optype,
 804                                 int cmd, int p1, void *p2)
 805 {
 806     /*
 807      * GOST CMS format is different for different cipher algorithms.
 808      * Most of other algorithms don't have such a difference
 809      * so this ctrl is just ignored.
 810      */
 811     if (cmd == EVP_PKEY_CTRL_CIPHER)
 812         return -2;
 813
 814 # ifndef OPENSSL_NO_DH
 815     if (keytype == EVP_PKEY_DH) {
 816         switch (cmd) {
 817             case EVP_PKEY_CTRL_DH_PAD:
 818                 return EVP_PKEY_CTX_set_dh_pad(ctx, p1);
 819             case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN:
 820                 return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, p1);
 821             case EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN:
 822                 return EVP_PKEY_CTX_set_dh_paramgen_subprime_len(ctx, p1);
 823             case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
 824                 return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, p1);
 825             case EVP_PKEY_CTRL_DH_PARAMGEN_TYPE:
 826                 return EVP_PKEY_CTX_set_dh_paramgen_type(ctx, p1);
 827             case EVP_PKEY_CTRL_DH_RFC5114:
 828                 return EVP_PKEY_CTX_set_dh_rfc5114(ctx, p1);
 829         }
 830     }
 831 # endif
 832 # ifndef OPENSSL_NO_DSA
 833     if (keytype == EVP_PKEY_DSA) {
 834         switch (cmd) {
 835         case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS:
 836             return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, p1);
 837         case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS:
 838             return EVP_PKEY_CTX_set_dsa_paramgen_q_bits(ctx, p1);
 839         case EVP_PKEY_CTRL_DSA_PARAMGEN_MD:
 840             return EVP_PKEY_CTX_set_dsa_paramgen_md(ctx, p2);
 841         }
 842     }
 843 # endif
 844 # ifndef OPENSSL_NO_EC
 845     if (keytype == EVP_PKEY_EC) {
 846         switch (cmd) {
 847         case EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID:
 848             return EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, p1);
 849         case EVP_PKEY_CTRL_EC_ECDH_COFACTOR:
 850             if (p1 == -2) {
 851                 return EVP_PKEY_CTX_get_ecdh_cofactor_mode(ctx);
 852             } else if (p1 < -1 || p1 > 1) {
 853                 /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 854                 return -2;
 855             } else {
 856                 return EVP_PKEY_CTX_set_ecdh_cofactor_mode(ctx, p1);
 857             }
 858         case EVP_PKEY_CTRL_EC_KDF_TYPE:
 859             if (p1 == -2) {
 860                 return EVP_PKEY_CTX_get_ecdh_kdf_type(ctx);
 861             } else {
 862                 return EVP_PKEY_CTX_set_ecdh_kdf_type(ctx, p1);
 863             }
 864         case EVP_PKEY_CTRL_GET_EC_KDF_MD:
 865             return EVP_PKEY_CTX_get_ecdh_kdf_md(ctx, p2);
 866         case EVP_PKEY_CTRL_EC_KDF_MD:
 867             return EVP_PKEY_CTX_set_ecdh_kdf_md(ctx, p2);
 868         case EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN:
 869             return EVP_PKEY_CTX_get_ecdh_kdf_outlen(ctx, p2);
 870         case EVP_PKEY_CTRL_EC_KDF_OUTLEN:
 871             return EVP_PKEY_CTX_set_ecdh_kdf_outlen(ctx, p1);
 872         case EVP_PKEY_CTRL_GET_EC_KDF_UKM:
 873             return EVP_PKEY_CTX_get0_ecdh_kdf_ukm(ctx, p2);
 874         case EVP_PKEY_CTRL_EC_KDF_UKM:
 875             return EVP_PKEY_CTX_set0_ecdh_kdf_ukm(ctx, p2, p1);
 876         }
 877     }
 878 # endif
 879     if (keytype == EVP_PKEY_RSA) {
 880         switch (cmd) {
 881         case EVP_PKEY_CTRL_RSA_OAEP_MD:
 882             return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, p2);
 883         case EVP_PKEY_CTRL_GET_RSA_OAEP_MD:
 884             return EVP_PKEY_CTX_get_rsa_oaep_md(ctx, p2);
 885         case EVP_PKEY_CTRL_RSA_MGF1_MD:
 886             return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, p2);
 887         case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
 888             return EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, p2, p1);
 889         case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL:
 890             return EVP_PKEY_CTX_get0_rsa_oaep_label(ctx, (unsigned char **)p2);
 891         case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
 892             return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, p1);
 893         case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
 894             return EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, p2);
 895         case EVP_PKEY_CTRL_RSA_KEYGEN_PRIMES:
 896             return EVP_PKEY_CTX_set_rsa_keygen_primes(ctx, p1);
 897         }
 898     }
 899     /*
 900      * keytype == -1 is used when several key types share the same structure,
 901      * or for generic controls that are the same across multiple key types.
 902      */
 903     if (keytype == -1) {
 904         switch (cmd) {
 905         case EVP_PKEY_CTRL_MD:
 906             return EVP_PKEY_CTX_set_signature_md(ctx, p2);
 907         case EVP_PKEY_CTRL_GET_MD:
 908             return EVP_PKEY_CTX_get_signature_md(ctx, p2);
 909         case EVP_PKEY_CTRL_RSA_PADDING:
 910             return EVP_PKEY_CTX_set_rsa_padding(ctx, p1);
 911         case EVP_PKEY_CTRL_GET_RSA_PADDING:
 912             return EVP_PKEY_CTX_get_rsa_padding(ctx, p2);
 913         case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
 914             return EVP_PKEY_CTX_get_rsa_oaep_md(ctx, p2);
 915         case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
 916             return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, p1);
 917         case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
 918             return EVP_PKEY_CTX_get_rsa_pss_saltlen(ctx, p2);
 919         case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
 920         case EVP_PKEY_CTRL_PKCS7_DECRYPT:
 921 # ifndef OPENSSL_NO_CMS
 922         case EVP_PKEY_CTRL_CMS_DECRYPT:
 923         case EVP_PKEY_CTRL_CMS_ENCRYPT:
 924 # endif
 925             /* TODO (3.0) Temporary hack, this should probe */
 926             if (!EVP_PKEY_is_a(EVP_PKEY_CTX_get0_pkey(ctx), "RSASSA-PSS"))
 927                 return 1;
 928             ERR_raise(ERR_LIB_EVP,
 929                       EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 930             return -2;
 931         }
 932     }
 933     return 0;
 934 }
 935
 936 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 937                       int cmd, int p1, void *p2)
 938 {
 939     int ret;
 940
 941     if (ctx == NULL) {
 942         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 943         return -2;
 944     }
 945
 946     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 947             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 948                 && ctx->op.sig.sigprovctx != NULL)
 949             || (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 950                 && ctx->op.ciph.ciphprovctx != NULL)
 951             || (EVP_PKEY_CTX_IS_GEN_OP(ctx)
 952                 && ctx->op.keymgmt.genctx != NULL))
 953         return legacy_ctrl_to_param(ctx, keytype, optype, cmd, p1, p2);
 954
 955     if (ctx->pmeth == NULL || ctx->pmeth->ctrl == NULL) {
 956         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 957         return -2;
 958     }
 959     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 960         return -1;
 961
 962     /* Skip the operation checks since this is called in a very early stage */
 963     if (ctx->pmeth->digest_custom != NULL)
 964         goto doit;
 965
 966     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 967         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 968         return -1;
 969     }
 970
 971     if ((optype != -1) && !(ctx->operation & optype)) {
 972         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 973         return -1;
 974     }
 975
 976  doit:
 977     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 978
 979     if (ret == -2)
 980         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 981
 982     return ret;
 983 }
 984
 985 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 986                              int cmd, uint64_t value)
 987 {
 988     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 989 }
 990
 991 static int legacy_ctrl_str_to_param(EVP_PKEY_CTX *ctx, const char *name,
 992                                     const char *value)
 993 {
 994
 995     /* Special cases that we intercept */
 996 # ifndef OPENSSL_NO_EC
 997     /*
 998      * We don't support encoding settings for providers, i.e. the only
 999      * possible encoding is "named_curve", so we simply fail when something
1000      * else is given, and otherwise just pretend all is fine.
1001      */
1002     if (strcmp(name, "ec_param_enc") == 0) {
1003         if (strcmp(value, "named_curve") == 0) {
1004             return 1;
1005         } else {
1006             ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1007             return -2;
1008         }
1009     }
1010 # endif
1011
1012     if (strcmp(name, "rsa_padding_mode") == 0)
1013         name = OSSL_ASYM_CIPHER_PARAM_PAD_MODE;
1014     else if (strcmp(name, "rsa_mgf1_md") == 0)
1015         name = OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST;
1016     else if (strcmp(name, "rsa_oaep_md") == 0)
1017         name = OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST;
1018     else if (strcmp(name, "rsa_oaep_label") == 0)
1019         name = OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL;
1020     else if (strcmp(name, "rsa_pss_saltlen") == 0)
1021         name = OSSL_SIGNATURE_PARAM_PSS_SALTLEN;
1022     else if (strcmp(name, "rsa_keygen_bits") == 0)
1023         name = OSSL_PKEY_PARAM_RSA_BITS;
1024     else if (strcmp(name, "rsa_keygen_pubexp") == 0)
1025         name = OSSL_PKEY_PARAM_RSA_E;
1026     else if (strcmp(name, "rsa_keygen_primes") == 0)
1027         name = OSSL_PKEY_PARAM_RSA_PRIMES;
1028 # ifndef OPENSSL_NO_DSA
1029     else if (strcmp(name, "dsa_paramgen_bits") == 0)
1030         name = OSSL_PKEY_PARAM_FFC_PBITS;
1031     else if (strcmp(name, "dsa_paramgen_q_bits") == 0)
1032         name = OSSL_PKEY_PARAM_FFC_QBITS;
1033     else if (strcmp(name, "dsa_paramgen_md") == 0)
1034         name = OSSL_PKEY_PARAM_FFC_DIGEST;
1035 # endif
1036 # ifndef OPENSSL_NO_DH
1037     else if (strcmp(name, "dh_paramgen_generator") == 0)
1038         name = OSSL_PKEY_PARAM_FFC_GENERATOR;
1039     else if (strcmp(name, "dh_paramgen_prime_len") == 0)
1040         name = OSSL_PKEY_PARAM_FFC_PBITS;
1041     else if (strcmp(name, "dh_paramgen_subprime_len") == 0)
1042         name = OSSL_PKEY_PARAM_FFC_QBITS;
1043     else if (strcmp(name, "dh_paramgen_type") == 0) {
1044         name = OSSL_PKEY_PARAM_FFC_TYPE;
1045         value = dh_gen_type_id2name(atoi(value));
1046     } else if (strcmp(name, "dh_param") == 0)
1047         name = OSSL_PKEY_PARAM_FFC_GROUP;
1048     else if (strcmp(name, "dh_rfc5114") == 0) {
1049         name = OSSL_PKEY_PARAM_FFC_GROUP;
1050         value = ffc_named_group_from_uid(atoi(value));
1051     } else if (strcmp(name, "dh_pad") == 0)
1052         name = OSSL_EXCHANGE_PARAM_PAD;
1053 # endif
1054 # ifndef OPENSSL_NO_EC
1055     else if (strcmp(name, "ec_paramgen_curve") == 0)
1056         name = OSSL_PKEY_PARAM_EC_NAME;
1057     else if (strcmp(name, "ecdh_cofactor_mode") == 0)
1058         name = OSSL_EXCHANGE_PARAM_EC_ECDH_COFACTOR_MODE;
1059     else if (strcmp(name, "ecdh_kdf_md") == 0)
1060         name = OSSL_EXCHANGE_PARAM_KDF_DIGEST;
1061 # endif
1062
1063     {
1064         /*
1065          * TODO(3.0) reduce the code above to only translate known legacy
1066          * string to the corresponding core name (see core_names.h), but
1067          * otherwise leave it to this code block to do the actual work.
1068          */
1069         const OSSL_PARAM *settable = EVP_PKEY_CTX_settable_params(ctx);
1070         OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1071         int rv = 0;
1072         int exists = 0;
1073
1074         if (!OSSL_PARAM_allocate_from_text(&params[0], settable, name, value,
1075                                            strlen(value), &exists)) {
1076             if (!exists) {
1077                 ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1078                 return -2;
1079             }
1080             return 0;
1081         }
1082         if (EVP_PKEY_CTX_set_params(ctx, params))
1083             rv = 1;
1084         OPENSSL_free(params[0].data);
1085         return rv;
1086     }
1087 }
1088
1089 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
1090                           const char *name, const char *value)
1091 {
1092     if (ctx == NULL) {
1093         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
1094         return -2;
1095     }
1096
1097     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
1098             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
1099                 && ctx->op.sig.sigprovctx != NULL)
1100             || (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
1101                 && ctx->op.ciph.ciphprovctx != NULL)
1102             || (EVP_PKEY_CTX_IS_GEN_OP(ctx)
1103                 && ctx->op.keymgmt.genctx != NULL))
1104         return legacy_ctrl_str_to_param(ctx, name, value);
1105
1106     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
1107         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
1108         return -2;
1109     }
1110     if (strcmp(name, "digest") == 0)
1111         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
1112                                value);
1113     return ctx->pmeth->ctrl_str(ctx, name, value);
1114 }
1115
1116 /* Utility functions to send a string of hex string to a ctrl */
1117
1118 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
1119 {
1120     size_t len;
1121
1122     len = strlen(str);
1123     if (len > INT_MAX)
1124         return -1;
1125     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
1126 }
1127
1128 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
1129 {
1130     unsigned char *bin;
1131     long binlen;
1132     int rv = -1;
1133
1134     bin = OPENSSL_hexstr2buf(hex, &binlen);
1135     if (bin == NULL)
1136         return 0;
1137     if (binlen <= INT_MAX)
1138         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
1139     OPENSSL_free(bin);
1140     return rv;
1141 }
1142
1143 /* Pass a message digest to a ctrl */
1144 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
1145 {
1146     const EVP_MD *m;
1147
1148     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
1149         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
1150         return 0;
1151     }
1152     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
1153 }
1154
1155 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
1156 {
1157     return ctx->operation;
1158 }
1159
1160 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
1161 {
1162     ctx->keygen_info = dat;
1163     ctx->keygen_info_count = datlen;
1164 }
1165
1166 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
1167 {
1168     ctx->data = data;
1169 }
1170
1171 void *EVP_PKEY_CTX_get_data(const EVP_PKEY_CTX *ctx)
1172 {
1173     return ctx->data;
1174 }
1175
1176 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
1177 {
1178     return ctx->pkey;
1179 }
1180
1181 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
1182 {
1183     return ctx->peerkey;
1184 }
1185
1186 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
1187 {
1188     ctx->app_data = data;
1189 }
1190
1191 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
1192 {
1193     return ctx->app_data;
1194 }
1195
1196 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
1197                             int (*init) (EVP_PKEY_CTX *ctx))
1198 {
1199     pmeth->init = init;
1200 }
1201
1202 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
1203                             int (*copy) (EVP_PKEY_CTX *dst,
1204                                          const EVP_PKEY_CTX *src))
1205 {
1206     pmeth->copy = copy;
1207 }
1208
1209 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
1210                                void (*cleanup) (EVP_PKEY_CTX *ctx))
1211 {
1212     pmeth->cleanup = cleanup;
1213 }
1214
1215 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
1216                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
1217                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
1218                                                  EVP_PKEY *pkey))
1219 {
1220     pmeth->paramgen_init = paramgen_init;
1221     pmeth->paramgen = paramgen;
1222 }
1223
1224 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
1225                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
1226                               int (*keygen) (EVP_PKEY_CTX *ctx,
1227                                              EVP_PKEY *pkey))
1228 {
1229     pmeth->keygen_init = keygen_init;
1230     pmeth->keygen = keygen;
1231 }
1232
1233 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
1234                             int (*sign_init) (EVP_PKEY_CTX *ctx),
1235                             int (*sign) (EVP_PKEY_CTX *ctx,
1236                                          unsigned char *sig, size_t *siglen,
1237                                          const unsigned char *tbs,
1238                                          size_t tbslen))
1239 {
1240     pmeth->sign_init = sign_init;
1241     pmeth->sign = sign;
1242 }
1243
1244 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
1245                               int (*verify_init) (EVP_PKEY_CTX *ctx),
1246                               int (*verify) (EVP_PKEY_CTX *ctx,
1247                                              const unsigned char *sig,
1248                                              size_t siglen,
1249                                              const unsigned char *tbs,
1250                                              size_t tbslen))
1251 {
1252     pmeth->verify_init = verify_init;
1253     pmeth->verify = verify;
1254 }
1255
1256 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
1257                                       int (*verify_recover_init) (EVP_PKEY_CTX
1258                                                                   *ctx),
1259                                       int (*verify_recover) (EVP_PKEY_CTX
1260                                                              *ctx,
1261                                                              unsigned char
1262                                                              *sig,
1263                                                              size_t *siglen,
1264                                                              const unsigned
1265                                                              char *tbs,
1266                                                              size_t tbslen))
1267 {
1268     pmeth->verify_recover_init = verify_recover_init;
1269     pmeth->verify_recover = verify_recover;
1270 }
1271
1272 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
1273                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
1274                                                     EVP_MD_CTX *mctx),
1275                                int (*signctx) (EVP_PKEY_CTX *ctx,
1276                                                unsigned char *sig,
1277                                                size_t *siglen,
1278                                                EVP_MD_CTX *mctx))
1279 {
1280     pmeth->signctx_init = signctx_init;
1281     pmeth->signctx = signctx;
1282 }
1283
1284 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
1285                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
1286                                                         EVP_MD_CTX *mctx),
1287                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
1288                                                    const unsigned char *sig,
1289                                                    int siglen,
1290                                                    EVP_MD_CTX *mctx))
1291 {
1292     pmeth->verifyctx_init = verifyctx_init;
1293     pmeth->verifyctx = verifyctx;
1294 }
1295
1296 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
1297                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
1298                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
1299                                                  unsigned char *out,
1300                                                  size_t *outlen,
1301                                                  const unsigned char *in,
1302                                                  size_t inlen))
1303 {
1304     pmeth->encrypt_init = encrypt_init;
1305     pmeth->encrypt = encryptfn;
1306 }
1307
1308 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
1309                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
1310                                int (*decrypt) (EVP_PKEY_CTX *ctx,
1311                                                unsigned char *out,
1312                                                size_t *outlen,
1313                                                const unsigned char *in,
1314                                                size_t inlen))
1315 {
1316     pmeth->decrypt_init = decrypt_init;
1317     pmeth->decrypt = decrypt;
1318 }
1319
1320 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
1321                               int (*derive_init) (EVP_PKEY_CTX *ctx),
1322                               int (*derive) (EVP_PKEY_CTX *ctx,
1323                                              unsigned char *key,
1324                                              size_t *keylen))
1325 {
1326     pmeth->derive_init = derive_init;
1327     pmeth->derive = derive;
1328 }
1329
1330 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
1331                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1332                                          void *p2),
1333                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
1334                                              const char *type,
1335                                              const char *value))
1336 {
1337     pmeth->ctrl = ctrl;
1338     pmeth->ctrl_str = ctrl_str;
1339 }
1340
1341 void EVP_PKEY_meth_set_digestsign(EVP_PKEY_METHOD *pmeth,
1342     int (*digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
1343                        const unsigned char *tbs, size_t tbslen))
1344 {
1345     pmeth->digestsign = digestsign;
1346 }
1347
1348 void EVP_PKEY_meth_set_digestverify(EVP_PKEY_METHOD *pmeth,
1349     int (*digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
1350                          size_t siglen, const unsigned char *tbs,
1351                          size_t tbslen))
1352 {
1353     pmeth->digestverify = digestverify;
1354 }
1355
1356 void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
1357                              int (*check) (EVP_PKEY *pkey))
1358 {
1359     pmeth->check = check;
1360 }
1361
1362 void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
1363                                     int (*check) (EVP_PKEY *pkey))
1364 {
1365     pmeth->public_check = check;
1366 }
1367
1368 void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
1369                                    int (*check) (EVP_PKEY *pkey))
1370 {
1371     pmeth->param_check = check;
1372 }
1373
1374 void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
1375                                      int (*digest_custom) (EVP_PKEY_CTX *ctx,
1376                                                            EVP_MD_CTX *mctx))
1377 {
1378     pmeth->digest_custom = digest_custom;
1379 }
1380
1381 void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
1382                             int (**pinit) (EVP_PKEY_CTX *ctx))
1383 {
1384     *pinit = pmeth->init;
1385 }
1386
1387 void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
1388                             int (**pcopy) (EVP_PKEY_CTX *dst,
1389                                            const EVP_PKEY_CTX *src))
1390 {
1391     *pcopy = pmeth->copy;
1392 }
1393
1394 void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
1395                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
1396 {
1397     *pcleanup = pmeth->cleanup;
1398 }
1399
1400 void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
1401                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
1402                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
1403                                                    EVP_PKEY *pkey))
1404 {
1405     if (pparamgen_init)
1406         *pparamgen_init = pmeth->paramgen_init;
1407     if (pparamgen)
1408         *pparamgen = pmeth->paramgen;
1409 }
1410
1411 void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
1412                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
1413                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
1414                                                EVP_PKEY *pkey))
1415 {
1416     if (pkeygen_init)
1417         *pkeygen_init = pmeth->keygen_init;
1418     if (pkeygen)
1419         *pkeygen = pmeth->keygen;
1420 }
1421
1422 void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
1423                             int (**psign_init) (EVP_PKEY_CTX *ctx),
1424                             int (**psign) (EVP_PKEY_CTX *ctx,
1425                                            unsigned char *sig, size_t *siglen,
1426                                            const unsigned char *tbs,
1427                                            size_t tbslen))
1428 {
1429     if (psign_init)
1430         *psign_init = pmeth->sign_init;
1431     if (psign)
1432         *psign = pmeth->sign;
1433 }
1434
1435 void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
1436                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
1437                               int (**pverify) (EVP_PKEY_CTX *ctx,
1438                                                const unsigned char *sig,
1439                                                size_t siglen,
1440                                                const unsigned char *tbs,
1441                                                size_t tbslen))
1442 {
1443     if (pverify_init)
1444         *pverify_init = pmeth->verify_init;
1445     if (pverify)
1446         *pverify = pmeth->verify;
1447 }
1448
1449 void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
1450                                       int (**pverify_recover_init) (EVP_PKEY_CTX
1451                                                                     *ctx),
1452                                       int (**pverify_recover) (EVP_PKEY_CTX
1453                                                                *ctx,
1454                                                                unsigned char
1455                                                                *sig,
1456                                                                size_t *siglen,
1457                                                                const unsigned
1458                                                                char *tbs,
1459                                                                size_t tbslen))
1460 {
1461     if (pverify_recover_init)
1462         *pverify_recover_init = pmeth->verify_recover_init;
1463     if (pverify_recover)
1464         *pverify_recover = pmeth->verify_recover;
1465 }
1466
1467 void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
1468                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
1469                                                       EVP_MD_CTX *mctx),
1470                                int (**psignctx) (EVP_PKEY_CTX *ctx,
1471                                                  unsigned char *sig,
1472                                                  size_t *siglen,
1473                                                  EVP_MD_CTX *mctx))
1474 {
1475     if (psignctx_init)
1476         *psignctx_init = pmeth->signctx_init;
1477     if (psignctx)
1478         *psignctx = pmeth->signctx;
1479 }
1480
1481 void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
1482                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
1483                                                           EVP_MD_CTX *mctx),
1484                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
1485                                                      const unsigned char *sig,
1486                                                      int siglen,
1487                                                      EVP_MD_CTX *mctx))
1488 {
1489     if (pverifyctx_init)
1490         *pverifyctx_init = pmeth->verifyctx_init;
1491     if (pverifyctx)
1492         *pverifyctx = pmeth->verifyctx;
1493 }
1494
1495 void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
1496                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
1497                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
1498                                                    unsigned char *out,
1499                                                    size_t *outlen,
1500                                                    const unsigned char *in,
1501                                                    size_t inlen))
1502 {
1503     if (pencrypt_init)
1504         *pencrypt_init = pmeth->encrypt_init;
1505     if (pencryptfn)
1506         *pencryptfn = pmeth->encrypt;
1507 }
1508
1509 void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
1510                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
1511                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
1512                                                  unsigned char *out,
1513                                                  size_t *outlen,
1514                                                  const unsigned char *in,
1515                                                  size_t inlen))
1516 {
1517     if (pdecrypt_init)
1518         *pdecrypt_init = pmeth->decrypt_init;
1519     if (pdecrypt)
1520         *pdecrypt = pmeth->decrypt;
1521 }
1522
1523 void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
1524                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
1525                               int (**pderive) (EVP_PKEY_CTX *ctx,
1526                                                unsigned char *key,
1527                                                size_t *keylen))
1528 {
1529     if (pderive_init)
1530         *pderive_init = pmeth->derive_init;
1531     if (pderive)
1532         *pderive = pmeth->derive;
1533 }
1534
1535 void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
1536                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1537                                            void *p2),
1538                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
1539                                                const char *type,
1540                                                const char *value))
1541 {
1542     if (pctrl)
1543         *pctrl = pmeth->ctrl;
1544     if (pctrl_str)
1545         *pctrl_str = pmeth->ctrl_str;
1546 }
1547
1548 void EVP_PKEY_meth_get_digestsign(EVP_PKEY_METHOD *pmeth,
1549     int (**digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
1550                         const unsigned char *tbs, size_t tbslen))
1551 {
1552     if (digestsign)
1553         *digestsign = pmeth->digestsign;
1554 }
1555
1556 void EVP_PKEY_meth_get_digestverify(EVP_PKEY_METHOD *pmeth,
1557     int (**digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
1558                           size_t siglen, const unsigned char *tbs,
1559                           size_t tbslen))
1560 {
1561     if (digestverify)
1562         *digestverify = pmeth->digestverify;
1563 }
1564
1565 void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
1566                              int (**pcheck) (EVP_PKEY *pkey))
1567 {
1568     if (pcheck != NULL)
1569         *pcheck = pmeth->check;
1570 }
1571
1572 void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
1573                                     int (**pcheck) (EVP_PKEY *pkey))
1574 {
1575     if (pcheck != NULL)
1576         *pcheck = pmeth->public_check;
1577 }
1578
1579 void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
1580                                    int (**pcheck) (EVP_PKEY *pkey))
1581 {
1582     if (pcheck != NULL)
1583         *pcheck = pmeth->param_check;
1584 }
1585
1586 void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
1587                                      int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
1588                                                              EVP_MD_CTX *mctx))
1589 {
1590     if (pdigest_custom != NULL)
1591         *pdigest_custom = pmeth->digest_custom;
1592 }
1593
1594 #endif /* FIPS_MODE */