crypto/evp/pmeth_lib.c

   1
   2 /*
   3  * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
   4  *
   5  * Licensed under the Apache License 2.0 (the "License").  You may not use
   6  * this file except in compliance with the License.  You can obtain a copy
   7  * in the file LICENSE in the source distribution or at
   8  * https://www.openssl.org/source/license.html
   9  */
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <openssl/engine.h>
  14 #include <openssl/evp.h>
  15 #include <openssl/x509v3.h>
  16 #include <openssl/core_names.h>
  17 #include <openssl/dh.h>
  18 #include "internal/cryptlib.h"
  19 #include "crypto/asn1.h"
  20 #include "crypto/evp.h"
  21 #include "internal/numbers.h"
  22 #include "internal/provider.h"
  23 #include "evp_local.h"
  24
  25 typedef const EVP_PKEY_METHOD *(*pmeth_fn)(void);
  26 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  27
  28 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  29
  30 /* This array needs to be in order of NIDs */
  31 static pmeth_fn standard_methods[] = {
  32 #ifndef OPENSSL_NO_RSA
  33     rsa_pkey_method,
  34 #endif
  35 #ifndef OPENSSL_NO_DH
  36     dh_pkey_method,
  37 #endif
  38 #ifndef OPENSSL_NO_DSA
  39     dsa_pkey_method,
  40 #endif
  41 #ifndef OPENSSL_NO_EC
  42     ec_pkey_method,
  43 #endif
  44     hmac_pkey_method,
  45 #ifndef OPENSSL_NO_CMAC
  46     cmac_pkey_method,
  47 #endif
  48 #ifndef OPENSSL_NO_RSA
  49     rsa_pss_pkey_method,
  50 #endif
  51 #ifndef OPENSSL_NO_DH
  52     dhx_pkey_method,
  53 #endif
  54 #ifndef OPENSSL_NO_SCRYPT
  55     scrypt_pkey_method,
  56 #endif
  57     tls1_prf_pkey_method,
  58 #ifndef OPENSSL_NO_EC
  59     ecx25519_pkey_method,
  60     ecx448_pkey_method,
  61 #endif
  62     hkdf_pkey_method,
  63 #ifndef OPENSSL_NO_POLY1305
  64     poly1305_pkey_method,
  65 #endif
  66 #ifndef OPENSSL_NO_SIPHASH
  67     siphash_pkey_method,
  68 #endif
  69 #ifndef OPENSSL_NO_EC
  70     ed25519_pkey_method,
  71     ed448_pkey_method,
  72 #endif
  73 #ifndef OPENSSL_NO_SM2
  74     sm2_pkey_method,
  75 #endif
  76 };
  77
  78 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, pmeth_fn, pmeth_func);
  79
  80 static int pmeth_func_cmp(const EVP_PKEY_METHOD *const *a, pmeth_fn const *b)
  81 {
  82     return ((*a)->pkey_id - ((**b)())->pkey_id);
  83 }
  84
  85 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, pmeth_fn, pmeth_func);
  86
  87 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
  88                      const EVP_PKEY_METHOD *const *b)
  89 {
  90     return ((*a)->pkey_id - (*b)->pkey_id);
  91 }
  92
  93 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
  94 {
  95     pmeth_fn *ret;
  96     EVP_PKEY_METHOD tmp;
  97     const EVP_PKEY_METHOD *t = &tmp;
  98
  99     tmp.pkey_id = type;
 100     if (app_pkey_methods) {
 101         int idx;
 102         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
 103         if (idx >= 0)
 104             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 105     }
 106     ret = OBJ_bsearch_pmeth_func(&t, standard_methods,
 107                                  sizeof(standard_methods) /
 108                                  sizeof(pmeth_fn));
 109     if (ret == NULL || *ret == NULL)
 110         return NULL;
 111     return (**ret)();
 112 }
 113
 114 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e,
 115                                  const char *name, const char *propquery,
 116                                  int id)
 117 {
 118     EVP_PKEY_CTX *ret;
 119     const EVP_PKEY_METHOD *pmeth = NULL;
 120
 121     /*
 122      * When using providers, the context is bound to the algo implementation
 123      * later.
 124      */
 125     if (pkey == NULL && e == NULL && id == -1)
 126         goto common;
 127
 128     /* TODO(3.0) Legacy code should be removed when all is provider based */
 129     /* BEGIN legacy */
 130     if (id == -1) {
 131         if (pkey == NULL)
 132             return 0;
 133         id = pkey->type;
 134     }
 135     name = OBJ_nid2sn(id);
 136     propquery = NULL;
 137 #ifndef OPENSSL_NO_ENGINE
 138     if (e == NULL && pkey != NULL)
 139         e = pkey->pmeth_engine != NULL ? pkey->pmeth_engine : pkey->engine;
 140     /* Try to find an ENGINE which implements this method */
 141     if (e) {
 142         if (!ENGINE_init(e)) {
 143             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 144             return NULL;
 145         }
 146     } else {
 147         e = ENGINE_get_pkey_meth_engine(id);
 148     }
 149
 150     /*
 151      * If an ENGINE handled this method look it up. Otherwise use internal
 152      * tables.
 153      */
 154     if (e)
 155         pmeth = ENGINE_get_pkey_meth(e, id);
 156     else
 157 #endif
 158         pmeth = EVP_PKEY_meth_find(id);
 159
 160     if (pmeth == NULL) {
 161 #ifndef OPENSSL_NO_ENGINE
 162         ENGINE_finish(e);
 163 #endif
 164         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 165         return NULL;
 166     }
 167     /* END legacy */
 168
 169  common:
 170     ret = OPENSSL_zalloc(sizeof(*ret));
 171     if (ret == NULL) {
 172 #ifndef OPENSSL_NO_ENGINE
 173         ENGINE_finish(e);
 174 #endif
 175         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 176         return NULL;
 177     }
 178     ret->algorithm = name;
 179     ret->propquery = propquery;
 180     ret->engine = e;
 181     ret->pmeth = pmeth;
 182     ret->operation = EVP_PKEY_OP_UNDEFINED;
 183     ret->pkey = pkey;
 184     if (pkey != NULL)
 185         EVP_PKEY_up_ref(pkey);
 186
 187     if (pmeth != NULL && pmeth->init != NULL) {
 188         if (pmeth->init(ret) <= 0) {
 189             ret->pmeth = NULL;
 190             EVP_PKEY_CTX_free(ret);
 191             return NULL;
 192         }
 193     }
 194
 195     return ret;
 196 }
 197
 198 void evp_pkey_ctx_free_old_ops(EVP_PKEY_CTX *ctx)
 199 {
 200     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 201         if (ctx->op.kex.exchprovctx != NULL && ctx->op.kex.exchange != NULL)
 202             ctx->op.kex.exchange->freectx(ctx->op.kex.exchprovctx);
 203         EVP_KEYEXCH_free(ctx->op.kex.exchange);
 204         ctx->op.kex.exchprovctx = NULL;
 205         ctx->op.kex.exchange = NULL;
 206     } else if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 207         if (ctx->op.sig.sigprovctx != NULL && ctx->op.sig.signature != NULL)
 208             ctx->op.sig.signature->freectx(ctx->op.sig.sigprovctx);
 209         EVP_SIGNATURE_free(ctx->op.sig.signature);
 210         ctx->op.sig.sigprovctx = NULL;
 211         ctx->op.sig.signature = NULL;
 212     }
 213 }
 214
 215 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 216 {
 217     EVP_PKEY_METHOD *pmeth;
 218
 219     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 220     if (pmeth == NULL) {
 221         EVPerr(EVP_F_EVP_PKEY_METH_NEW, ERR_R_MALLOC_FAILURE);
 222         return NULL;
 223     }
 224
 225     pmeth->pkey_id = id;
 226     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 227     return pmeth;
 228 }
 229
 230 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 231                              const EVP_PKEY_METHOD *meth)
 232 {
 233     if (ppkey_id)
 234         *ppkey_id = meth->pkey_id;
 235     if (pflags)
 236         *pflags = meth->flags;
 237 }
 238
 239 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 240 {
 241
 242     dst->init = src->init;
 243     dst->copy = src->copy;
 244     dst->cleanup = src->cleanup;
 245
 246     dst->paramgen_init = src->paramgen_init;
 247     dst->paramgen = src->paramgen;
 248
 249     dst->keygen_init = src->keygen_init;
 250     dst->keygen = src->keygen;
 251
 252     dst->sign_init = src->sign_init;
 253     dst->sign = src->sign;
 254
 255     dst->verify_init = src->verify_init;
 256     dst->verify = src->verify;
 257
 258     dst->verify_recover_init = src->verify_recover_init;
 259     dst->verify_recover = src->verify_recover;
 260
 261     dst->signctx_init = src->signctx_init;
 262     dst->signctx = src->signctx;
 263
 264     dst->verifyctx_init = src->verifyctx_init;
 265     dst->verifyctx = src->verifyctx;
 266
 267     dst->encrypt_init = src->encrypt_init;
 268     dst->encrypt = src->encrypt;
 269
 270     dst->decrypt_init = src->decrypt_init;
 271     dst->decrypt = src->decrypt;
 272
 273     dst->derive_init = src->derive_init;
 274     dst->derive = src->derive;
 275
 276     dst->ctrl = src->ctrl;
 277     dst->ctrl_str = src->ctrl_str;
 278
 279     dst->check = src->check;
 280 }
 281
 282 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 283 {
 284     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 285         OPENSSL_free(pmeth);
 286 }
 287
 288 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 289 {
 290     return int_ctx_new(pkey, e, NULL, NULL, -1);
 291 }
 292
 293 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 294 {
 295     return int_ctx_new(NULL, e, NULL, NULL, id);
 296 }
 297
 298 EVP_PKEY_CTX *EVP_PKEY_CTX_new_provided(const char *name,
 299                                         const char *propquery)
 300 {
 301     return int_ctx_new(NULL, NULL, name, propquery, -1);
 302 }
 303
 304 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(const EVP_PKEY_CTX *pctx)
 305 {
 306     EVP_PKEY_CTX *rctx;
 307
 308     if (((pctx->pmeth == NULL) || (pctx->pmeth->copy == NULL))
 309             && ((EVP_PKEY_CTX_IS_DERIVE_OP(pctx)
 310                  && pctx->op.kex.exchprovctx == NULL)
 311                 || (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)
 312                     && pctx->op.sig.sigprovctx == NULL)))
 313         return NULL;
 314 #ifndef OPENSSL_NO_ENGINE
 315     /* Make sure it's safe to copy a pkey context using an ENGINE */
 316     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 317         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 318         return 0;
 319     }
 320 #endif
 321     rctx = OPENSSL_zalloc(sizeof(*rctx));
 322     if (rctx == NULL) {
 323         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_MALLOC_FAILURE);
 324         return NULL;
 325     }
 326
 327     if (pctx->pkey != NULL)
 328         EVP_PKEY_up_ref(pctx->pkey);
 329     rctx->pkey = pctx->pkey;
 330     rctx->operation = pctx->operation;
 331     rctx->algorithm = pctx->algorithm;
 332     rctx->propquery = pctx->propquery;
 333
 334     if (EVP_PKEY_CTX_IS_DERIVE_OP(pctx)) {
 335         if (pctx->op.kex.exchange != NULL) {
 336             rctx->op.kex.exchange = pctx->op.kex.exchange;
 337             if (!EVP_KEYEXCH_up_ref(rctx->op.kex.exchange)) {
 338                 OPENSSL_free(rctx);
 339                 return NULL;
 340             }
 341         }
 342         if (pctx->op.kex.exchprovctx != NULL) {
 343             if (!ossl_assert(pctx->op.kex.exchange != NULL))
 344                 return NULL;
 345             rctx->op.kex.exchprovctx
 346                 = pctx->op.kex.exchange->dupctx(pctx->op.kex.exchprovctx);
 347             if (rctx->op.kex.exchprovctx == NULL) {
 348                 EVP_KEYEXCH_free(rctx->op.kex.exchange);
 349                 OPENSSL_free(rctx);
 350                 return NULL;
 351             }
 352             return rctx;
 353         }
 354     } else if (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)) {
 355         if (pctx->op.sig.signature != NULL) {
 356             rctx->op.sig.signature = pctx->op.sig.signature;
 357             if (!EVP_SIGNATURE_up_ref(rctx->op.sig.signature)) {
 358                 OPENSSL_free(rctx);
 359                 return NULL;
 360             }
 361         }
 362         if (pctx->op.sig.sigprovctx != NULL) {
 363             if (!ossl_assert(pctx->op.sig.signature != NULL))
 364                 return NULL;
 365             rctx->op.sig.sigprovctx
 366                 = pctx->op.sig.signature->dupctx(pctx->op.sig.sigprovctx);
 367             if (rctx->op.sig.sigprovctx == NULL) {
 368                 EVP_SIGNATURE_free(rctx->op.sig.signature);
 369                 OPENSSL_free(rctx);
 370                 return NULL;
 371             }
 372             return rctx;
 373         }
 374     }
 375
 376     rctx->pmeth = pctx->pmeth;
 377 #ifndef OPENSSL_NO_ENGINE
 378     rctx->engine = pctx->engine;
 379 #endif
 380
 381     if (pctx->peerkey)
 382         EVP_PKEY_up_ref(pctx->peerkey);
 383     rctx->peerkey = pctx->peerkey;
 384
 385     if (pctx->pmeth->copy(rctx, pctx) > 0)
 386         return rctx;
 387
 388     rctx->pmeth = NULL;
 389     EVP_PKEY_CTX_free(rctx);
 390     return NULL;
 391
 392 }
 393
 394 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 395 {
 396     if (app_pkey_methods == NULL) {
 397         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 398         if (app_pkey_methods == NULL){
 399             EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 400             return 0;
 401         }
 402     }
 403     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth)) {
 404         EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 405         return 0;
 406     }
 407     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 408     return 1;
 409 }
 410
 411 void evp_app_cleanup_int(void)
 412 {
 413     if (app_pkey_methods != NULL)
 414         sk_EVP_PKEY_METHOD_pop_free(app_pkey_methods, EVP_PKEY_meth_free);
 415 }
 416
 417 int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth)
 418 {
 419     const EVP_PKEY_METHOD *ret;
 420
 421     ret = sk_EVP_PKEY_METHOD_delete_ptr(app_pkey_methods, pmeth);
 422
 423     return ret == NULL ? 0 : 1;
 424 }
 425
 426 size_t EVP_PKEY_meth_get_count(void)
 427 {
 428     size_t rv = OSSL_NELEM(standard_methods);
 429
 430     if (app_pkey_methods)
 431         rv += sk_EVP_PKEY_METHOD_num(app_pkey_methods);
 432     return rv;
 433 }
 434
 435 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx)
 436 {
 437     if (idx < OSSL_NELEM(standard_methods))
 438         return (standard_methods[idx])();
 439     if (app_pkey_methods == NULL)
 440         return NULL;
 441     idx -= OSSL_NELEM(standard_methods);
 442     if (idx >= (size_t)sk_EVP_PKEY_METHOD_num(app_pkey_methods))
 443         return NULL;
 444     return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 445 }
 446
 447 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 448 {
 449     if (ctx == NULL)
 450         return;
 451     if (ctx->pmeth && ctx->pmeth->cleanup)
 452         ctx->pmeth->cleanup(ctx);
 453
 454     evp_pkey_ctx_free_old_ops(ctx);
 455
 456     EVP_PKEY_free(ctx->pkey);
 457     EVP_PKEY_free(ctx->peerkey);
 458 #ifndef OPENSSL_NO_ENGINE
 459     ENGINE_finish(ctx->engine);
 460 #endif
 461     OPENSSL_free(ctx);
 462 }
 463
 464 int EVP_PKEY_CTX_get_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 465 {
 466     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 467             && ctx->op.sig.sigprovctx != NULL
 468             && ctx->op.sig.signature != NULL
 469             && ctx->op.sig.signature->get_ctx_params != NULL)
 470         return ctx->op.sig.signature->get_ctx_params(ctx->op.sig.sigprovctx,
 471                                                      params);
 472     return 0;
 473 }
 474
 475 const OSSL_PARAM *EVP_PKEY_CTX_gettable_params(EVP_PKEY_CTX *ctx)
 476 {
 477     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 478             && ctx->op.sig.signature != NULL
 479             && ctx->op.sig.signature->gettable_ctx_params != NULL)
 480         return ctx->op.sig.signature->gettable_ctx_params();
 481
 482     return NULL;
 483 }
 484
 485 int EVP_PKEY_CTX_set_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 486 {
 487     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 488             && ctx->op.kex.exchprovctx != NULL
 489             && ctx->op.kex.exchange != NULL
 490             && ctx->op.kex.exchange->set_ctx_params != NULL)
 491         return ctx->op.kex.exchange->set_ctx_params(ctx->op.kex.exchprovctx,
 492                                                     params);
 493     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 494             && ctx->op.sig.sigprovctx != NULL
 495             && ctx->op.sig.signature != NULL
 496             && ctx->op.sig.signature->set_ctx_params != NULL)
 497         return ctx->op.sig.signature->set_ctx_params(ctx->op.sig.sigprovctx,
 498                                                      params);
 499     return 0;
 500 }
 501
 502 const OSSL_PARAM *EVP_PKEY_CTX_settable_params(EVP_PKEY_CTX *ctx)
 503 {
 504     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 505             && ctx->op.kex.exchange != NULL
 506             && ctx->op.kex.exchange->settable_ctx_params != NULL)
 507         return ctx->op.kex.exchange->settable_ctx_params();
 508     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 509             && ctx->op.sig.signature != NULL
 510             && ctx->op.sig.signature->settable_ctx_params != NULL)
 511         return ctx->op.sig.signature->settable_ctx_params();
 512
 513     return NULL;
 514 }
 515
 516 #ifndef OPENSSL_NO_DH
 517 int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad)
 518 {
 519     OSSL_PARAM dh_pad_params[2];
 520     unsigned int upad = pad;
 521
 522     /* We use EVP_PKEY_CTX_ctrl return values */
 523     if (ctx == NULL || !EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 524         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 525         return -2;
 526     }
 527
 528     /* TODO(3.0): Remove this eventually when no more legacy */
 529     if (ctx->op.kex.exchprovctx == NULL)
 530         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_DERIVE,
 531                                  EVP_PKEY_CTRL_DH_PAD, pad, NULL);
 532
 533     dh_pad_params[0] = OSSL_PARAM_construct_uint(OSSL_EXCHANGE_PARAM_PAD, &upad);
 534     dh_pad_params[1] = OSSL_PARAM_construct_end();
 535
 536     return EVP_PKEY_CTX_set_params(ctx, dh_pad_params);
 537 }
 538 #endif
 539
 540 int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **md)
 541 {
 542     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 543     /* 80 should be big enough */
 544     char name[80] = "";
 545     const EVP_MD *tmp;
 546
 547     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 548         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 549         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 550         return -2;
 551     }
 552
 553     /* TODO(3.0): Remove this eventually when no more legacy */
 554     if (ctx->op.sig.sigprovctx == NULL)
 555         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 556                                  EVP_PKEY_CTRL_GET_MD, 0, (void *)(md));
 557
 558     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 559                                             name,
 560                                             sizeof(name));
 561     *p++ = OSSL_PARAM_construct_end();
 562
 563     if (!EVP_PKEY_CTX_get_params(ctx, sig_md_params))
 564         return 0;
 565
 566     tmp = EVP_get_digestbyname(name);
 567     if (tmp == NULL)
 568         return 0;
 569
 570     *md = tmp;
 571
 572     return 1;
 573 }
 574
 575 int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
 576 {
 577     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 578     size_t mdsize;
 579     const char *name;
 580
 581     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 582         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 583         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 584         return -2;
 585     }
 586
 587     /* TODO(3.0): Remove this eventually when no more legacy */
 588     if (ctx->op.sig.sigprovctx == NULL)
 589         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 590                                  EVP_PKEY_CTRL_MD, 0, (void *)(md));
 591
 592     if (md == NULL) {
 593         name = "";
 594         mdsize = 0;
 595     } else {
 596         mdsize = EVP_MD_size(md);
 597         name = EVP_MD_name(md);
 598     }
 599
 600     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 601                                             /*
 602                                              * Cast away the const. This is read
 603                                              * only so should be safe
 604                                              */
 605                                             (char *)name,
 606                                             strlen(name) + 1);
 607     *p++ = OSSL_PARAM_construct_size_t(OSSL_SIGNATURE_PARAM_DIGEST_SIZE,
 608                                        &mdsize);
 609     *p++ = OSSL_PARAM_construct_end();
 610
 611     return EVP_PKEY_CTX_set_params(ctx, sig_md_params);
 612 }
 613
 614 static int legacy_ctrl_to_param(EVP_PKEY_CTX *ctx, int keytype, int optype,
 615                                 int cmd, int p1, void *p2)
 616 {
 617     switch (cmd) {
 618 #ifndef OPENSSL_NO_DH
 619     case EVP_PKEY_CTRL_DH_PAD:
 620         return EVP_PKEY_CTX_set_dh_pad(ctx, p1);
 621 #endif
 622     case EVP_PKEY_CTRL_MD:
 623         return EVP_PKEY_CTX_set_signature_md(ctx, p2);
 624     case EVP_PKEY_CTRL_GET_MD:
 625         return EVP_PKEY_CTX_get_signature_md(ctx, p2);
 626     }
 627     return 0;
 628 }
 629
 630 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 631                       int cmd, int p1, void *p2)
 632 {
 633     int ret;
 634
 635     if (ctx == NULL) {
 636         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 637         return -2;
 638     }
 639
 640     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 641             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 642                 && ctx->op.sig.sigprovctx != NULL))
 643         return legacy_ctrl_to_param(ctx, keytype, optype, cmd, p1, p2);
 644
 645     if (ctx->pmeth == NULL || ctx->pmeth->ctrl == NULL) {
 646         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 647         return -2;
 648     }
 649     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 650         return -1;
 651
 652     /* Skip the operation checks since this is called in a very early stage */
 653     if (ctx->pmeth->digest_custom != NULL)
 654         goto doit;
 655
 656     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 657         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 658         return -1;
 659     }
 660
 661     if ((optype != -1) && !(ctx->operation & optype)) {
 662         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 663         return -1;
 664     }
 665
 666  doit:
 667     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 668
 669     if (ret == -2)
 670         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 671
 672     return ret;
 673 }
 674
 675 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 676                              int cmd, uint64_t value)
 677 {
 678     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 679 }
 680
 681 static int legacy_ctrl_str_to_param(EVP_PKEY_CTX *ctx, const char *name,
 682                                     const char *value)
 683 {
 684 #ifndef OPENSSL_NO_DH
 685     if (strcmp(name, "dh_pad") == 0) {
 686         int pad;
 687
 688         pad = atoi(value);
 689         return EVP_PKEY_CTX_set_dh_pad(ctx, pad);
 690     }
 691 #endif
 692     if (strcmp(name, "digest") == 0) {
 693         int ret;
 694         EVP_MD *md;
 695
 696         if (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) || ctx->op.sig.signature == NULL)
 697             return 0;
 698         md = EVP_MD_fetch(ossl_provider_library_context(ctx->op.sig.signature->prov),
 699                           value, NULL);
 700         if (md == NULL)
 701             return 0;
 702         ret = EVP_PKEY_CTX_set_signature_md(ctx, md);
 703         EVP_MD_meth_free(md);
 704         return ret;
 705     }
 706
 707     return 0;
 708 }
 709
 710 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 711                           const char *name, const char *value)
 712 {
 713     if (ctx == NULL) {
 714         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 715         return -2;
 716     }
 717
 718     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 719             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 720                 && ctx->op.sig.sigprovctx != NULL))
 721         return legacy_ctrl_str_to_param(ctx, name, value);
 722
 723     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 724         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 725         return -2;
 726     }
 727     if (strcmp(name, "digest") == 0)
 728         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
 729                                value);
 730     return ctx->pmeth->ctrl_str(ctx, name, value);
 731 }
 732
 733 /* Utility functions to send a string of hex string to a ctrl */
 734
 735 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 736 {
 737     size_t len;
 738
 739     len = strlen(str);
 740     if (len > INT_MAX)
 741         return -1;
 742     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 743 }
 744
 745 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 746 {
 747     unsigned char *bin;
 748     long binlen;
 749     int rv = -1;
 750
 751     bin = OPENSSL_hexstr2buf(hex, &binlen);
 752     if (bin == NULL)
 753         return 0;
 754     if (binlen <= INT_MAX)
 755         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 756     OPENSSL_free(bin);
 757     return rv;
 758 }
 759
 760 /* Pass a message digest to a ctrl */
 761 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
 762 {
 763     const EVP_MD *m;
 764
 765     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
 766         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
 767         return 0;
 768     }
 769     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
 770 }
 771
 772 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 773 {
 774     return ctx->operation;
 775 }
 776
 777 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 778 {
 779     ctx->keygen_info = dat;
 780     ctx->keygen_info_count = datlen;
 781 }
 782
 783 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 784 {
 785     ctx->data = data;
 786 }
 787
 788 void *EVP_PKEY_CTX_get_data(const EVP_PKEY_CTX *ctx)
 789 {
 790     return ctx->data;
 791 }
 792
 793 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 794 {
 795     return ctx->pkey;
 796 }
 797
 798 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 799 {
 800     return ctx->peerkey;
 801 }
 802
 803 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 804 {
 805     ctx->app_data = data;
 806 }
 807
 808 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 809 {
 810     return ctx->app_data;
 811 }
 812
 813 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 814                             int (*init) (EVP_PKEY_CTX *ctx))
 815 {
 816     pmeth->init = init;
 817 }
 818
 819 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 820                             int (*copy) (EVP_PKEY_CTX *dst,
 821                                          const EVP_PKEY_CTX *src))
 822 {
 823     pmeth->copy = copy;
 824 }
 825
 826 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 827                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 828 {
 829     pmeth->cleanup = cleanup;
 830 }
 831
 832 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 833                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 834                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 835                                                  EVP_PKEY *pkey))
 836 {
 837     pmeth->paramgen_init = paramgen_init;
 838     pmeth->paramgen = paramgen;
 839 }
 840
 841 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 842                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 843                               int (*keygen) (EVP_PKEY_CTX *ctx,
 844                                              EVP_PKEY *pkey))
 845 {
 846     pmeth->keygen_init = keygen_init;
 847     pmeth->keygen = keygen;
 848 }
 849
 850 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 851                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 852                             int (*sign) (EVP_PKEY_CTX *ctx,
 853                                          unsigned char *sig, size_t *siglen,
 854                                          const unsigned char *tbs,
 855                                          size_t tbslen))
 856 {
 857     pmeth->sign_init = sign_init;
 858     pmeth->sign = sign;
 859 }
 860
 861 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 862                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 863                               int (*verify) (EVP_PKEY_CTX *ctx,
 864                                              const unsigned char *sig,
 865                                              size_t siglen,
 866                                              const unsigned char *tbs,
 867                                              size_t tbslen))
 868 {
 869     pmeth->verify_init = verify_init;
 870     pmeth->verify = verify;
 871 }
 872
 873 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 874                                       int (*verify_recover_init) (EVP_PKEY_CTX
 875                                                                   *ctx),
 876                                       int (*verify_recover) (EVP_PKEY_CTX
 877                                                              *ctx,
 878                                                              unsigned char
 879                                                              *sig,
 880                                                              size_t *siglen,
 881                                                              const unsigned
 882                                                              char *tbs,
 883                                                              size_t tbslen))
 884 {
 885     pmeth->verify_recover_init = verify_recover_init;
 886     pmeth->verify_recover = verify_recover;
 887 }
 888
 889 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 890                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 891                                                     EVP_MD_CTX *mctx),
 892                                int (*signctx) (EVP_PKEY_CTX *ctx,
 893                                                unsigned char *sig,
 894                                                size_t *siglen,
 895                                                EVP_MD_CTX *mctx))
 896 {
 897     pmeth->signctx_init = signctx_init;
 898     pmeth->signctx = signctx;
 899 }
 900
 901 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 902                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 903                                                         EVP_MD_CTX *mctx),
 904                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 905                                                    const unsigned char *sig,
 906                                                    int siglen,
 907                                                    EVP_MD_CTX *mctx))
 908 {
 909     pmeth->verifyctx_init = verifyctx_init;
 910     pmeth->verifyctx = verifyctx;
 911 }
 912
 913 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 914                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 915                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 916                                                  unsigned char *out,
 917                                                  size_t *outlen,
 918                                                  const unsigned char *in,
 919                                                  size_t inlen))
 920 {
 921     pmeth->encrypt_init = encrypt_init;
 922     pmeth->encrypt = encryptfn;
 923 }
 924
 925 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 926                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 927                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 928                                                unsigned char *out,
 929                                                size_t *outlen,
 930                                                const unsigned char *in,
 931                                                size_t inlen))
 932 {
 933     pmeth->decrypt_init = decrypt_init;
 934     pmeth->decrypt = decrypt;
 935 }
 936
 937 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 938                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 939                               int (*derive) (EVP_PKEY_CTX *ctx,
 940                                              unsigned char *key,
 941                                              size_t *keylen))
 942 {
 943     pmeth->derive_init = derive_init;
 944     pmeth->derive = derive;
 945 }
 946
 947 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 948                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 949                                          void *p2),
 950                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 951                                              const char *type,
 952                                              const char *value))
 953 {
 954     pmeth->ctrl = ctrl;
 955     pmeth->ctrl_str = ctrl_str;
 956 }
 957
 958 void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
 959                              int (*check) (EVP_PKEY *pkey))
 960 {
 961     pmeth->check = check;
 962 }
 963
 964 void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
 965                                     int (*check) (EVP_PKEY *pkey))
 966 {
 967     pmeth->public_check = check;
 968 }
 969
 970 void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
 971                                    int (*check) (EVP_PKEY *pkey))
 972 {
 973     pmeth->param_check = check;
 974 }
 975
 976 void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
 977                                      int (*digest_custom) (EVP_PKEY_CTX *ctx,
 978                                                            EVP_MD_CTX *mctx))
 979 {
 980     pmeth->digest_custom = digest_custom;
 981 }
 982
 983 void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
 984                             int (**pinit) (EVP_PKEY_CTX *ctx))
 985 {
 986     *pinit = pmeth->init;
 987 }
 988
 989 void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
 990                             int (**pcopy) (EVP_PKEY_CTX *dst,
 991                                            const EVP_PKEY_CTX *src))
 992 {
 993     *pcopy = pmeth->copy;
 994 }
 995
 996 void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
 997                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 998 {
 999     *pcleanup = pmeth->cleanup;
1000 }
1001
1002 void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
1003                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
1004                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
1005                                                    EVP_PKEY *pkey))
1006 {
1007     if (pparamgen_init)
1008         *pparamgen_init = pmeth->paramgen_init;
1009     if (pparamgen)
1010         *pparamgen = pmeth->paramgen;
1011 }
1012
1013 void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
1014                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
1015                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
1016                                                EVP_PKEY *pkey))
1017 {
1018     if (pkeygen_init)
1019         *pkeygen_init = pmeth->keygen_init;
1020     if (pkeygen)
1021         *pkeygen = pmeth->keygen;
1022 }
1023
1024 void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
1025                             int (**psign_init) (EVP_PKEY_CTX *ctx),
1026                             int (**psign) (EVP_PKEY_CTX *ctx,
1027                                            unsigned char *sig, size_t *siglen,
1028                                            const unsigned char *tbs,
1029                                            size_t tbslen))
1030 {
1031     if (psign_init)
1032         *psign_init = pmeth->sign_init;
1033     if (psign)
1034         *psign = pmeth->sign;
1035 }
1036
1037 void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
1038                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
1039                               int (**pverify) (EVP_PKEY_CTX *ctx,
1040                                                const unsigned char *sig,
1041                                                size_t siglen,
1042                                                const unsigned char *tbs,
1043                                                size_t tbslen))
1044 {
1045     if (pverify_init)
1046         *pverify_init = pmeth->verify_init;
1047     if (pverify)
1048         *pverify = pmeth->verify;
1049 }
1050
1051 void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
1052                                       int (**pverify_recover_init) (EVP_PKEY_CTX
1053                                                                     *ctx),
1054                                       int (**pverify_recover) (EVP_PKEY_CTX
1055                                                                *ctx,
1056                                                                unsigned char
1057                                                                *sig,
1058                                                                size_t *siglen,
1059                                                                const unsigned
1060                                                                char *tbs,
1061                                                                size_t tbslen))
1062 {
1063     if (pverify_recover_init)
1064         *pverify_recover_init = pmeth->verify_recover_init;
1065     if (pverify_recover)
1066         *pverify_recover = pmeth->verify_recover;
1067 }
1068
1069 void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
1070                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
1071                                                       EVP_MD_CTX *mctx),
1072                                int (**psignctx) (EVP_PKEY_CTX *ctx,
1073                                                  unsigned char *sig,
1074                                                  size_t *siglen,
1075                                                  EVP_MD_CTX *mctx))
1076 {
1077     if (psignctx_init)
1078         *psignctx_init = pmeth->signctx_init;
1079     if (psignctx)
1080         *psignctx = pmeth->signctx;
1081 }
1082
1083 void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
1084                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
1085                                                           EVP_MD_CTX *mctx),
1086                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
1087                                                      const unsigned char *sig,
1088                                                      int siglen,
1089                                                      EVP_MD_CTX *mctx))
1090 {
1091     if (pverifyctx_init)
1092         *pverifyctx_init = pmeth->verifyctx_init;
1093     if (pverifyctx)
1094         *pverifyctx = pmeth->verifyctx;
1095 }
1096
1097 void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
1098                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
1099                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
1100                                                    unsigned char *out,
1101                                                    size_t *outlen,
1102                                                    const unsigned char *in,
1103                                                    size_t inlen))
1104 {
1105     if (pencrypt_init)
1106         *pencrypt_init = pmeth->encrypt_init;
1107     if (pencryptfn)
1108         *pencryptfn = pmeth->encrypt;
1109 }
1110
1111 void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
1112                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
1113                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
1114                                                  unsigned char *out,
1115                                                  size_t *outlen,
1116                                                  const unsigned char *in,
1117                                                  size_t inlen))
1118 {
1119     if (pdecrypt_init)
1120         *pdecrypt_init = pmeth->decrypt_init;
1121     if (pdecrypt)
1122         *pdecrypt = pmeth->decrypt;
1123 }
1124
1125 void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
1126                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
1127                               int (**pderive) (EVP_PKEY_CTX *ctx,
1128                                                unsigned char *key,
1129                                                size_t *keylen))
1130 {
1131     if (pderive_init)
1132         *pderive_init = pmeth->derive_init;
1133     if (pderive)
1134         *pderive = pmeth->derive;
1135 }
1136
1137 void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
1138                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1139                                            void *p2),
1140                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
1141                                                const char *type,
1142                                                const char *value))
1143 {
1144     if (pctrl)
1145         *pctrl = pmeth->ctrl;
1146     if (pctrl_str)
1147         *pctrl_str = pmeth->ctrl_str;
1148 }
1149
1150 void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
1151                              int (**pcheck) (EVP_PKEY *pkey))
1152 {
1153     if (pcheck != NULL)
1154         *pcheck = pmeth->check;
1155 }
1156
1157 void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
1158                                     int (**pcheck) (EVP_PKEY *pkey))
1159 {
1160     if (pcheck != NULL)
1161         *pcheck = pmeth->public_check;
1162 }
1163
1164 void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
1165                                    int (**pcheck) (EVP_PKEY *pkey))
1166 {
1167     if (pcheck != NULL)
1168         *pcheck = pmeth->param_check;
1169 }
1170
1171 void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
1172                                      int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
1173                                                              EVP_MD_CTX *mctx))
1174 {
1175     if (pdigest_custom != NULL)
1176         *pdigest_custom = pmeth->digest_custom;
1177 }