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(OPENSSL_CTX *libctx,
 115                                  EVP_PKEY *pkey, ENGINE *e,
 116                                  const char *name, const char *propquery,
 117                                  int id)
 118 {
 119     EVP_PKEY_CTX *ret;
 120     const EVP_PKEY_METHOD *pmeth = NULL;
 121
 122     /*
 123      * When using providers, the context is bound to the algo implementation
 124      * later.
 125      */
 126     if (pkey == NULL && e == NULL && id == -1)
 127         goto common;
 128
 129     /* TODO(3.0) Legacy code should be removed when all is provider based */
 130     /* BEGIN legacy */
 131     if (id == -1) {
 132         if (pkey == NULL)
 133             return 0;
 134         id = pkey->type;
 135     }
 136
 137     /*
 138      * Here, we extract what information we can for the purpose of
 139      * supporting usage with implementations from providers, to make
 140      * for a smooth transition from legacy stuff to provider based stuff.
 141      *
 142      * If an engine is given, this is entirely legacy, and we should not
 143      * pretend anything else, so we only set the name when no engine is
 144      * given.  If both are already given, someone made a mistake, and
 145      * since that can only happen internally, it's safe to make an
 146      * assertion.
 147      */
 148     if (!ossl_assert(e == NULL || name == NULL))
 149         return NULL;
 150     if (e == NULL)
 151         name = OBJ_nid2sn(id);
 152     propquery = NULL;
 153     /*
 154      * We were called using legacy data, or an EVP_PKEY, but an EVP_PKEY
 155      * isn't tied to a specific library context, so we fall back to the
 156      * default library context.
 157      * TODO(v3.0): an EVP_PKEY that doesn't originate from a leagacy key
 158      * structure only has the pkeys[] cache, where the first element is
 159      * considered the "origin".  Investigate if that could be a suitable
 160      * way to find a library context.
 161      */
 162     libctx = NULL;
 163
 164 #ifndef OPENSSL_NO_ENGINE
 165     if (e == NULL && pkey != NULL)
 166         e = pkey->pmeth_engine != NULL ? pkey->pmeth_engine : pkey->engine;
 167     /* Try to find an ENGINE which implements this method */
 168     if (e) {
 169         if (!ENGINE_init(e)) {
 170             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 171             return NULL;
 172         }
 173     } else {
 174         e = ENGINE_get_pkey_meth_engine(id);
 175     }
 176
 177     /*
 178      * If an ENGINE handled this method look it up. Otherwise use internal
 179      * tables.
 180      */
 181     if (e)
 182         pmeth = ENGINE_get_pkey_meth(e, id);
 183     else
 184 #endif
 185         pmeth = EVP_PKEY_meth_find(id);
 186
 187     if (pmeth == NULL) {
 188 #ifndef OPENSSL_NO_ENGINE
 189         ENGINE_finish(e);
 190 #endif
 191         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 192         return NULL;
 193     }
 194     /* END legacy */
 195
 196  common:
 197     ret = OPENSSL_zalloc(sizeof(*ret));
 198     if (ret == NULL) {
 199 #ifndef OPENSSL_NO_ENGINE
 200         ENGINE_finish(e);
 201 #endif
 202         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 203         return NULL;
 204     }
 205     ret->libctx = libctx;
 206     ret->algorithm = name;
 207     ret->propquery = propquery;
 208     ret->engine = e;
 209     ret->pmeth = pmeth;
 210     ret->operation = EVP_PKEY_OP_UNDEFINED;
 211     ret->pkey = pkey;
 212     if (pkey != NULL)
 213         EVP_PKEY_up_ref(pkey);
 214
 215     if (pmeth != NULL && pmeth->init != NULL) {
 216         if (pmeth->init(ret) <= 0) {
 217             ret->pmeth = NULL;
 218             EVP_PKEY_CTX_free(ret);
 219             return NULL;
 220         }
 221     }
 222
 223     return ret;
 224 }
 225
 226 void evp_pkey_ctx_free_old_ops(EVP_PKEY_CTX *ctx)
 227 {
 228     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 229         if (ctx->op.kex.exchprovctx != NULL && ctx->op.kex.exchange != NULL)
 230             ctx->op.kex.exchange->freectx(ctx->op.kex.exchprovctx);
 231         EVP_KEYEXCH_free(ctx->op.kex.exchange);
 232         ctx->op.kex.exchprovctx = NULL;
 233         ctx->op.kex.exchange = NULL;
 234     } else if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 235         if (ctx->op.sig.sigprovctx != NULL && ctx->op.sig.signature != NULL)
 236             ctx->op.sig.signature->freectx(ctx->op.sig.sigprovctx);
 237         EVP_SIGNATURE_free(ctx->op.sig.signature);
 238         ctx->op.sig.sigprovctx = NULL;
 239         ctx->op.sig.signature = NULL;
 240     }
 241 }
 242
 243 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 244 {
 245     EVP_PKEY_METHOD *pmeth;
 246
 247     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 248     if (pmeth == NULL) {
 249         EVPerr(EVP_F_EVP_PKEY_METH_NEW, ERR_R_MALLOC_FAILURE);
 250         return NULL;
 251     }
 252
 253     pmeth->pkey_id = id;
 254     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 255     return pmeth;
 256 }
 257
 258 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 259                              const EVP_PKEY_METHOD *meth)
 260 {
 261     if (ppkey_id)
 262         *ppkey_id = meth->pkey_id;
 263     if (pflags)
 264         *pflags = meth->flags;
 265 }
 266
 267 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 268 {
 269
 270     dst->init = src->init;
 271     dst->copy = src->copy;
 272     dst->cleanup = src->cleanup;
 273
 274     dst->paramgen_init = src->paramgen_init;
 275     dst->paramgen = src->paramgen;
 276
 277     dst->keygen_init = src->keygen_init;
 278     dst->keygen = src->keygen;
 279
 280     dst->sign_init = src->sign_init;
 281     dst->sign = src->sign;
 282
 283     dst->verify_init = src->verify_init;
 284     dst->verify = src->verify;
 285
 286     dst->verify_recover_init = src->verify_recover_init;
 287     dst->verify_recover = src->verify_recover;
 288
 289     dst->signctx_init = src->signctx_init;
 290     dst->signctx = src->signctx;
 291
 292     dst->verifyctx_init = src->verifyctx_init;
 293     dst->verifyctx = src->verifyctx;
 294
 295     dst->encrypt_init = src->encrypt_init;
 296     dst->encrypt = src->encrypt;
 297
 298     dst->decrypt_init = src->decrypt_init;
 299     dst->decrypt = src->decrypt;
 300
 301     dst->derive_init = src->derive_init;
 302     dst->derive = src->derive;
 303
 304     dst->ctrl = src->ctrl;
 305     dst->ctrl_str = src->ctrl_str;
 306
 307     dst->check = src->check;
 308 }
 309
 310 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 311 {
 312     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 313         OPENSSL_free(pmeth);
 314 }
 315
 316 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 317 {
 318     return int_ctx_new(NULL, pkey, e, NULL, NULL, -1);
 319 }
 320
 321 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 322 {
 323     return int_ctx_new(NULL, NULL, e, NULL, NULL, id);
 324 }
 325
 326 EVP_PKEY_CTX *EVP_PKEY_CTX_new_provided(OPENSSL_CTX *libctx,
 327                                         const char *name,
 328                                         const char *propquery)
 329 {
 330     return int_ctx_new(libctx, NULL, NULL, name, propquery, -1);
 331 }
 332
 333 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(const EVP_PKEY_CTX *pctx)
 334 {
 335     EVP_PKEY_CTX *rctx;
 336
 337     if (((pctx->pmeth == NULL) || (pctx->pmeth->copy == NULL))
 338             && ((EVP_PKEY_CTX_IS_DERIVE_OP(pctx)
 339                  && pctx->op.kex.exchprovctx == NULL)
 340                 || (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)
 341                     && pctx->op.sig.sigprovctx == NULL)))
 342         return NULL;
 343 #ifndef OPENSSL_NO_ENGINE
 344     /* Make sure it's safe to copy a pkey context using an ENGINE */
 345     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 346         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 347         return 0;
 348     }
 349 #endif
 350     rctx = OPENSSL_zalloc(sizeof(*rctx));
 351     if (rctx == NULL) {
 352         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_MALLOC_FAILURE);
 353         return NULL;
 354     }
 355
 356     if (pctx->pkey != NULL)
 357         EVP_PKEY_up_ref(pctx->pkey);
 358     rctx->pkey = pctx->pkey;
 359     rctx->operation = pctx->operation;
 360     rctx->libctx = pctx->libctx;
 361     rctx->algorithm = pctx->algorithm;
 362     rctx->propquery = pctx->propquery;
 363
 364     if (EVP_PKEY_CTX_IS_DERIVE_OP(pctx)) {
 365         if (pctx->op.kex.exchange != NULL) {
 366             rctx->op.kex.exchange = pctx->op.kex.exchange;
 367             if (!EVP_KEYEXCH_up_ref(rctx->op.kex.exchange)) {
 368                 OPENSSL_free(rctx);
 369                 return NULL;
 370             }
 371         }
 372         if (pctx->op.kex.exchprovctx != NULL) {
 373             if (!ossl_assert(pctx->op.kex.exchange != NULL))
 374                 return NULL;
 375             rctx->op.kex.exchprovctx
 376                 = pctx->op.kex.exchange->dupctx(pctx->op.kex.exchprovctx);
 377             if (rctx->op.kex.exchprovctx == NULL) {
 378                 EVP_KEYEXCH_free(rctx->op.kex.exchange);
 379                 OPENSSL_free(rctx);
 380                 return NULL;
 381             }
 382             return rctx;
 383         }
 384     } else if (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)) {
 385         if (pctx->op.sig.signature != NULL) {
 386             rctx->op.sig.signature = pctx->op.sig.signature;
 387             if (!EVP_SIGNATURE_up_ref(rctx->op.sig.signature)) {
 388                 OPENSSL_free(rctx);
 389                 return NULL;
 390             }
 391         }
 392         if (pctx->op.sig.sigprovctx != NULL) {
 393             if (!ossl_assert(pctx->op.sig.signature != NULL))
 394                 return NULL;
 395             rctx->op.sig.sigprovctx
 396                 = pctx->op.sig.signature->dupctx(pctx->op.sig.sigprovctx);
 397             if (rctx->op.sig.sigprovctx == NULL) {
 398                 EVP_SIGNATURE_free(rctx->op.sig.signature);
 399                 OPENSSL_free(rctx);
 400                 return NULL;
 401             }
 402             return rctx;
 403         }
 404     }
 405
 406     rctx->pmeth = pctx->pmeth;
 407 #ifndef OPENSSL_NO_ENGINE
 408     rctx->engine = pctx->engine;
 409 #endif
 410
 411     if (pctx->peerkey)
 412         EVP_PKEY_up_ref(pctx->peerkey);
 413     rctx->peerkey = pctx->peerkey;
 414
 415     if (pctx->pmeth->copy(rctx, pctx) > 0)
 416         return rctx;
 417
 418     rctx->pmeth = NULL;
 419     EVP_PKEY_CTX_free(rctx);
 420     return NULL;
 421
 422 }
 423
 424 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 425 {
 426     if (app_pkey_methods == NULL) {
 427         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 428         if (app_pkey_methods == NULL){
 429             EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 430             return 0;
 431         }
 432     }
 433     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth)) {
 434         EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 435         return 0;
 436     }
 437     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 438     return 1;
 439 }
 440
 441 void evp_app_cleanup_int(void)
 442 {
 443     if (app_pkey_methods != NULL)
 444         sk_EVP_PKEY_METHOD_pop_free(app_pkey_methods, EVP_PKEY_meth_free);
 445 }
 446
 447 int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth)
 448 {
 449     const EVP_PKEY_METHOD *ret;
 450
 451     ret = sk_EVP_PKEY_METHOD_delete_ptr(app_pkey_methods, pmeth);
 452
 453     return ret == NULL ? 0 : 1;
 454 }
 455
 456 size_t EVP_PKEY_meth_get_count(void)
 457 {
 458     size_t rv = OSSL_NELEM(standard_methods);
 459
 460     if (app_pkey_methods)
 461         rv += sk_EVP_PKEY_METHOD_num(app_pkey_methods);
 462     return rv;
 463 }
 464
 465 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx)
 466 {
 467     if (idx < OSSL_NELEM(standard_methods))
 468         return (standard_methods[idx])();
 469     if (app_pkey_methods == NULL)
 470         return NULL;
 471     idx -= OSSL_NELEM(standard_methods);
 472     if (idx >= (size_t)sk_EVP_PKEY_METHOD_num(app_pkey_methods))
 473         return NULL;
 474     return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 475 }
 476
 477 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 478 {
 479     if (ctx == NULL)
 480         return;
 481     if (ctx->pmeth && ctx->pmeth->cleanup)
 482         ctx->pmeth->cleanup(ctx);
 483
 484     evp_pkey_ctx_free_old_ops(ctx);
 485     EVP_KEYMGMT_free(ctx->keymgmt);
 486
 487     EVP_PKEY_free(ctx->pkey);
 488     EVP_PKEY_free(ctx->peerkey);
 489 #ifndef OPENSSL_NO_ENGINE
 490     ENGINE_finish(ctx->engine);
 491 #endif
 492     OPENSSL_free(ctx);
 493 }
 494
 495 int EVP_PKEY_CTX_get_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 496 {
 497     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 498             && ctx->op.sig.sigprovctx != NULL
 499             && ctx->op.sig.signature != NULL
 500             && ctx->op.sig.signature->get_ctx_params != NULL)
 501         return ctx->op.sig.signature->get_ctx_params(ctx->op.sig.sigprovctx,
 502                                                      params);
 503     return 0;
 504 }
 505
 506 const OSSL_PARAM *EVP_PKEY_CTX_gettable_params(EVP_PKEY_CTX *ctx)
 507 {
 508     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 509             && ctx->op.sig.signature != NULL
 510             && ctx->op.sig.signature->gettable_ctx_params != NULL)
 511         return ctx->op.sig.signature->gettable_ctx_params();
 512
 513     return NULL;
 514 }
 515
 516 int EVP_PKEY_CTX_set_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 517 {
 518     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 519             && ctx->op.kex.exchprovctx != NULL
 520             && ctx->op.kex.exchange != NULL
 521             && ctx->op.kex.exchange->set_ctx_params != NULL)
 522         return ctx->op.kex.exchange->set_ctx_params(ctx->op.kex.exchprovctx,
 523                                                     params);
 524     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 525             && ctx->op.sig.sigprovctx != NULL
 526             && ctx->op.sig.signature != NULL
 527             && ctx->op.sig.signature->set_ctx_params != NULL)
 528         return ctx->op.sig.signature->set_ctx_params(ctx->op.sig.sigprovctx,
 529                                                      params);
 530     return 0;
 531 }
 532
 533 const OSSL_PARAM *EVP_PKEY_CTX_settable_params(EVP_PKEY_CTX *ctx)
 534 {
 535     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 536             && ctx->op.kex.exchange != NULL
 537             && ctx->op.kex.exchange->settable_ctx_params != NULL)
 538         return ctx->op.kex.exchange->settable_ctx_params();
 539     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 540             && ctx->op.sig.signature != NULL
 541             && ctx->op.sig.signature->settable_ctx_params != NULL)
 542         return ctx->op.sig.signature->settable_ctx_params();
 543
 544     return NULL;
 545 }
 546
 547 #ifndef OPENSSL_NO_DH
 548 int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad)
 549 {
 550     OSSL_PARAM dh_pad_params[2];
 551     unsigned int upad = pad;
 552
 553     /* We use EVP_PKEY_CTX_ctrl return values */
 554     if (ctx == NULL || !EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 555         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 556         return -2;
 557     }
 558
 559     /* TODO(3.0): Remove this eventually when no more legacy */
 560     if (ctx->op.kex.exchprovctx == NULL)
 561         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_DERIVE,
 562                                  EVP_PKEY_CTRL_DH_PAD, pad, NULL);
 563
 564     dh_pad_params[0] = OSSL_PARAM_construct_uint(OSSL_EXCHANGE_PARAM_PAD, &upad);
 565     dh_pad_params[1] = OSSL_PARAM_construct_end();
 566
 567     return EVP_PKEY_CTX_set_params(ctx, dh_pad_params);
 568 }
 569 #endif
 570
 571 int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **md)
 572 {
 573     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 574     /* 80 should be big enough */
 575     char name[80] = "";
 576     const EVP_MD *tmp;
 577
 578     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 579         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 580         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 581         return -2;
 582     }
 583
 584     /* TODO(3.0): Remove this eventually when no more legacy */
 585     if (ctx->op.sig.sigprovctx == NULL)
 586         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 587                                  EVP_PKEY_CTRL_GET_MD, 0, (void *)(md));
 588
 589     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 590                                             name,
 591                                             sizeof(name));
 592     *p++ = OSSL_PARAM_construct_end();
 593
 594     if (!EVP_PKEY_CTX_get_params(ctx, sig_md_params))
 595         return 0;
 596
 597     tmp = evp_get_digestbyname_ex(ctx->libctx, name);
 598     if (tmp == NULL)
 599         return 0;
 600
 601     *md = tmp;
 602
 603     return 1;
 604 }
 605
 606 int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
 607 {
 608     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 609     size_t mdsize;
 610     const char *name;
 611
 612     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 613         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 614         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 615         return -2;
 616     }
 617
 618     /* TODO(3.0): Remove this eventually when no more legacy */
 619     if (ctx->op.sig.sigprovctx == NULL)
 620         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 621                                  EVP_PKEY_CTRL_MD, 0, (void *)(md));
 622
 623     if (md == NULL) {
 624         name = "";
 625         mdsize = 0;
 626     } else {
 627         mdsize = EVP_MD_size(md);
 628         name = EVP_MD_name(md);
 629     }
 630
 631     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 632                                             /*
 633                                              * Cast away the const. This is read
 634                                              * only so should be safe
 635                                              */
 636                                             (char *)name,
 637                                             strlen(name) + 1);
 638     *p++ = OSSL_PARAM_construct_size_t(OSSL_SIGNATURE_PARAM_DIGEST_SIZE,
 639                                        &mdsize);
 640     *p++ = OSSL_PARAM_construct_end();
 641
 642     return EVP_PKEY_CTX_set_params(ctx, sig_md_params);
 643 }
 644
 645 static int legacy_ctrl_to_param(EVP_PKEY_CTX *ctx, int keytype, int optype,
 646                                 int cmd, int p1, void *p2)
 647 {
 648     switch (cmd) {
 649 #ifndef OPENSSL_NO_DH
 650     case EVP_PKEY_CTRL_DH_PAD:
 651         return EVP_PKEY_CTX_set_dh_pad(ctx, p1);
 652 #endif
 653     case EVP_PKEY_CTRL_MD:
 654         return EVP_PKEY_CTX_set_signature_md(ctx, p2);
 655     case EVP_PKEY_CTRL_GET_MD:
 656         return EVP_PKEY_CTX_get_signature_md(ctx, p2);
 657     }
 658     return 0;
 659 }
 660
 661 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 662                       int cmd, int p1, void *p2)
 663 {
 664     int ret;
 665
 666     if (ctx == NULL) {
 667         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 668         return -2;
 669     }
 670
 671     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 672             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 673                 && ctx->op.sig.sigprovctx != NULL))
 674         return legacy_ctrl_to_param(ctx, keytype, optype, cmd, p1, p2);
 675
 676     if (ctx->pmeth == NULL || ctx->pmeth->ctrl == NULL) {
 677         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 678         return -2;
 679     }
 680     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 681         return -1;
 682
 683     /* Skip the operation checks since this is called in a very early stage */
 684     if (ctx->pmeth->digest_custom != NULL)
 685         goto doit;
 686
 687     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 688         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 689         return -1;
 690     }
 691
 692     if ((optype != -1) && !(ctx->operation & optype)) {
 693         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 694         return -1;
 695     }
 696
 697  doit:
 698     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 699
 700     if (ret == -2)
 701         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 702
 703     return ret;
 704 }
 705
 706 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 707                              int cmd, uint64_t value)
 708 {
 709     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 710 }
 711
 712 static int legacy_ctrl_str_to_param(EVP_PKEY_CTX *ctx, const char *name,
 713                                     const char *value)
 714 {
 715 #ifndef OPENSSL_NO_DH
 716     if (strcmp(name, "dh_pad") == 0) {
 717         int pad;
 718
 719         pad = atoi(value);
 720         return EVP_PKEY_CTX_set_dh_pad(ctx, pad);
 721     }
 722 #endif
 723     if (strcmp(name, "digest") == 0) {
 724         int ret;
 725         EVP_MD *md;
 726
 727         if (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) || ctx->op.sig.signature == NULL)
 728             return 0;
 729         md = EVP_MD_fetch(ossl_provider_library_context(ctx->op.sig.signature->prov),
 730                           value, NULL);
 731         if (md == NULL)
 732             return 0;
 733         ret = EVP_PKEY_CTX_set_signature_md(ctx, md);
 734         EVP_MD_meth_free(md);
 735         return ret;
 736     }
 737
 738     return 0;
 739 }
 740
 741 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 742                           const char *name, const char *value)
 743 {
 744     if (ctx == NULL) {
 745         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 746         return -2;
 747     }
 748
 749     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 750             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 751                 && ctx->op.sig.sigprovctx != NULL))
 752         return legacy_ctrl_str_to_param(ctx, name, value);
 753
 754     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 755         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 756         return -2;
 757     }
 758     if (strcmp(name, "digest") == 0)
 759         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
 760                                value);
 761     return ctx->pmeth->ctrl_str(ctx, name, value);
 762 }
 763
 764 /* Utility functions to send a string of hex string to a ctrl */
 765
 766 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 767 {
 768     size_t len;
 769
 770     len = strlen(str);
 771     if (len > INT_MAX)
 772         return -1;
 773     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 774 }
 775
 776 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 777 {
 778     unsigned char *bin;
 779     long binlen;
 780     int rv = -1;
 781
 782     bin = OPENSSL_hexstr2buf(hex, &binlen);
 783     if (bin == NULL)
 784         return 0;
 785     if (binlen <= INT_MAX)
 786         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 787     OPENSSL_free(bin);
 788     return rv;
 789 }
 790
 791 /* Pass a message digest to a ctrl */
 792 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
 793 {
 794     const EVP_MD *m;
 795
 796     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
 797         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
 798         return 0;
 799     }
 800     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
 801 }
 802
 803 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 804 {
 805     return ctx->operation;
 806 }
 807
 808 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 809 {
 810     ctx->keygen_info = dat;
 811     ctx->keygen_info_count = datlen;
 812 }
 813
 814 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 815 {
 816     ctx->data = data;
 817 }
 818
 819 void *EVP_PKEY_CTX_get_data(const EVP_PKEY_CTX *ctx)
 820 {
 821     return ctx->data;
 822 }
 823
 824 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 825 {
 826     return ctx->pkey;
 827 }
 828
 829 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 830 {
 831     return ctx->peerkey;
 832 }
 833
 834 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 835 {
 836     ctx->app_data = data;
 837 }
 838
 839 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 840 {
 841     return ctx->app_data;
 842 }
 843
 844 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 845                             int (*init) (EVP_PKEY_CTX *ctx))
 846 {
 847     pmeth->init = init;
 848 }
 849
 850 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 851                             int (*copy) (EVP_PKEY_CTX *dst,
 852                                          const EVP_PKEY_CTX *src))
 853 {
 854     pmeth->copy = copy;
 855 }
 856
 857 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 858                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 859 {
 860     pmeth->cleanup = cleanup;
 861 }
 862
 863 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 864                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 865                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 866                                                  EVP_PKEY *pkey))
 867 {
 868     pmeth->paramgen_init = paramgen_init;
 869     pmeth->paramgen = paramgen;
 870 }
 871
 872 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 873                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 874                               int (*keygen) (EVP_PKEY_CTX *ctx,
 875                                              EVP_PKEY *pkey))
 876 {
 877     pmeth->keygen_init = keygen_init;
 878     pmeth->keygen = keygen;
 879 }
 880
 881 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 882                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 883                             int (*sign) (EVP_PKEY_CTX *ctx,
 884                                          unsigned char *sig, size_t *siglen,
 885                                          const unsigned char *tbs,
 886                                          size_t tbslen))
 887 {
 888     pmeth->sign_init = sign_init;
 889     pmeth->sign = sign;
 890 }
 891
 892 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 893                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 894                               int (*verify) (EVP_PKEY_CTX *ctx,
 895                                              const unsigned char *sig,
 896                                              size_t siglen,
 897                                              const unsigned char *tbs,
 898                                              size_t tbslen))
 899 {
 900     pmeth->verify_init = verify_init;
 901     pmeth->verify = verify;
 902 }
 903
 904 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 905                                       int (*verify_recover_init) (EVP_PKEY_CTX
 906                                                                   *ctx),
 907                                       int (*verify_recover) (EVP_PKEY_CTX
 908                                                              *ctx,
 909                                                              unsigned char
 910                                                              *sig,
 911                                                              size_t *siglen,
 912                                                              const unsigned
 913                                                              char *tbs,
 914                                                              size_t tbslen))
 915 {
 916     pmeth->verify_recover_init = verify_recover_init;
 917     pmeth->verify_recover = verify_recover;
 918 }
 919
 920 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 921                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 922                                                     EVP_MD_CTX *mctx),
 923                                int (*signctx) (EVP_PKEY_CTX *ctx,
 924                                                unsigned char *sig,
 925                                                size_t *siglen,
 926                                                EVP_MD_CTX *mctx))
 927 {
 928     pmeth->signctx_init = signctx_init;
 929     pmeth->signctx = signctx;
 930 }
 931
 932 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 933                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 934                                                         EVP_MD_CTX *mctx),
 935                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 936                                                    const unsigned char *sig,
 937                                                    int siglen,
 938                                                    EVP_MD_CTX *mctx))
 939 {
 940     pmeth->verifyctx_init = verifyctx_init;
 941     pmeth->verifyctx = verifyctx;
 942 }
 943
 944 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 945                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 946                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 947                                                  unsigned char *out,
 948                                                  size_t *outlen,
 949                                                  const unsigned char *in,
 950                                                  size_t inlen))
 951 {
 952     pmeth->encrypt_init = encrypt_init;
 953     pmeth->encrypt = encryptfn;
 954 }
 955
 956 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 957                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 958                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 959                                                unsigned char *out,
 960                                                size_t *outlen,
 961                                                const unsigned char *in,
 962                                                size_t inlen))
 963 {
 964     pmeth->decrypt_init = decrypt_init;
 965     pmeth->decrypt = decrypt;
 966 }
 967
 968 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 969                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 970                               int (*derive) (EVP_PKEY_CTX *ctx,
 971                                              unsigned char *key,
 972                                              size_t *keylen))
 973 {
 974     pmeth->derive_init = derive_init;
 975     pmeth->derive = derive;
 976 }
 977
 978 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 979                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 980                                          void *p2),
 981                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 982                                              const char *type,
 983                                              const char *value))
 984 {
 985     pmeth->ctrl = ctrl;
 986     pmeth->ctrl_str = ctrl_str;
 987 }
 988
 989 void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
 990                              int (*check) (EVP_PKEY *pkey))
 991 {
 992     pmeth->check = check;
 993 }
 994
 995 void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
 996                                     int (*check) (EVP_PKEY *pkey))
 997 {
 998     pmeth->public_check = check;
 999 }
1000
1001 void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
1002                                    int (*check) (EVP_PKEY *pkey))
1003 {
1004     pmeth->param_check = check;
1005 }
1006
1007 void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
1008                                      int (*digest_custom) (EVP_PKEY_CTX *ctx,
1009                                                            EVP_MD_CTX *mctx))
1010 {
1011     pmeth->digest_custom = digest_custom;
1012 }
1013
1014 void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
1015                             int (**pinit) (EVP_PKEY_CTX *ctx))
1016 {
1017     *pinit = pmeth->init;
1018 }
1019
1020 void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
1021                             int (**pcopy) (EVP_PKEY_CTX *dst,
1022                                            const EVP_PKEY_CTX *src))
1023 {
1024     *pcopy = pmeth->copy;
1025 }
1026
1027 void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
1028                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
1029 {
1030     *pcleanup = pmeth->cleanup;
1031 }
1032
1033 void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
1034                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
1035                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
1036                                                    EVP_PKEY *pkey))
1037 {
1038     if (pparamgen_init)
1039         *pparamgen_init = pmeth->paramgen_init;
1040     if (pparamgen)
1041         *pparamgen = pmeth->paramgen;
1042 }
1043
1044 void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
1045                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
1046                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
1047                                                EVP_PKEY *pkey))
1048 {
1049     if (pkeygen_init)
1050         *pkeygen_init = pmeth->keygen_init;
1051     if (pkeygen)
1052         *pkeygen = pmeth->keygen;
1053 }
1054
1055 void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
1056                             int (**psign_init) (EVP_PKEY_CTX *ctx),
1057                             int (**psign) (EVP_PKEY_CTX *ctx,
1058                                            unsigned char *sig, size_t *siglen,
1059                                            const unsigned char *tbs,
1060                                            size_t tbslen))
1061 {
1062     if (psign_init)
1063         *psign_init = pmeth->sign_init;
1064     if (psign)
1065         *psign = pmeth->sign;
1066 }
1067
1068 void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
1069                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
1070                               int (**pverify) (EVP_PKEY_CTX *ctx,
1071                                                const unsigned char *sig,
1072                                                size_t siglen,
1073                                                const unsigned char *tbs,
1074                                                size_t tbslen))
1075 {
1076     if (pverify_init)
1077         *pverify_init = pmeth->verify_init;
1078     if (pverify)
1079         *pverify = pmeth->verify;
1080 }
1081
1082 void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
1083                                       int (**pverify_recover_init) (EVP_PKEY_CTX
1084                                                                     *ctx),
1085                                       int (**pverify_recover) (EVP_PKEY_CTX
1086                                                                *ctx,
1087                                                                unsigned char
1088                                                                *sig,
1089                                                                size_t *siglen,
1090                                                                const unsigned
1091                                                                char *tbs,
1092                                                                size_t tbslen))
1093 {
1094     if (pverify_recover_init)
1095         *pverify_recover_init = pmeth->verify_recover_init;
1096     if (pverify_recover)
1097         *pverify_recover = pmeth->verify_recover;
1098 }
1099
1100 void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
1101                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
1102                                                       EVP_MD_CTX *mctx),
1103                                int (**psignctx) (EVP_PKEY_CTX *ctx,
1104                                                  unsigned char *sig,
1105                                                  size_t *siglen,
1106                                                  EVP_MD_CTX *mctx))
1107 {
1108     if (psignctx_init)
1109         *psignctx_init = pmeth->signctx_init;
1110     if (psignctx)
1111         *psignctx = pmeth->signctx;
1112 }
1113
1114 void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
1115                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
1116                                                           EVP_MD_CTX *mctx),
1117                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
1118                                                      const unsigned char *sig,
1119                                                      int siglen,
1120                                                      EVP_MD_CTX *mctx))
1121 {
1122     if (pverifyctx_init)
1123         *pverifyctx_init = pmeth->verifyctx_init;
1124     if (pverifyctx)
1125         *pverifyctx = pmeth->verifyctx;
1126 }
1127
1128 void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
1129                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
1130                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
1131                                                    unsigned char *out,
1132                                                    size_t *outlen,
1133                                                    const unsigned char *in,
1134                                                    size_t inlen))
1135 {
1136     if (pencrypt_init)
1137         *pencrypt_init = pmeth->encrypt_init;
1138     if (pencryptfn)
1139         *pencryptfn = pmeth->encrypt;
1140 }
1141
1142 void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
1143                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
1144                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
1145                                                  unsigned char *out,
1146                                                  size_t *outlen,
1147                                                  const unsigned char *in,
1148                                                  size_t inlen))
1149 {
1150     if (pdecrypt_init)
1151         *pdecrypt_init = pmeth->decrypt_init;
1152     if (pdecrypt)
1153         *pdecrypt = pmeth->decrypt;
1154 }
1155
1156 void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
1157                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
1158                               int (**pderive) (EVP_PKEY_CTX *ctx,
1159                                                unsigned char *key,
1160                                                size_t *keylen))
1161 {
1162     if (pderive_init)
1163         *pderive_init = pmeth->derive_init;
1164     if (pderive)
1165         *pderive = pmeth->derive;
1166 }
1167
1168 void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
1169                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1170                                            void *p2),
1171                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
1172                                                const char *type,
1173                                                const char *value))
1174 {
1175     if (pctrl)
1176         *pctrl = pmeth->ctrl;
1177     if (pctrl_str)
1178         *pctrl_str = pmeth->ctrl_str;
1179 }
1180
1181 void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
1182                              int (**pcheck) (EVP_PKEY *pkey))
1183 {
1184     if (pcheck != NULL)
1185         *pcheck = pmeth->check;
1186 }
1187
1188 void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
1189                                     int (**pcheck) (EVP_PKEY *pkey))
1190 {
1191     if (pcheck != NULL)
1192         *pcheck = pmeth->public_check;
1193 }
1194
1195 void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
1196                                    int (**pcheck) (EVP_PKEY *pkey))
1197 {
1198     if (pcheck != NULL)
1199         *pcheck = pmeth->param_check;
1200 }
1201
1202 void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
1203                                      int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
1204                                                              EVP_MD_CTX *mctx))
1205 {
1206     if (pdigest_custom != NULL)
1207         *pdigest_custom = pmeth->digest_custom;
1208 }