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