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
 486     EVP_PKEY_free(ctx->pkey);
 487     EVP_PKEY_free(ctx->peerkey);
 488 #ifndef OPENSSL_NO_ENGINE
 489     ENGINE_finish(ctx->engine);
 490 #endif
 491     OPENSSL_free(ctx);
 492 }
 493
 494 int EVP_PKEY_CTX_get_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 495 {
 496     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 497             && ctx->op.sig.sigprovctx != NULL
 498             && ctx->op.sig.signature != NULL
 499             && ctx->op.sig.signature->get_ctx_params != NULL)
 500         return ctx->op.sig.signature->get_ctx_params(ctx->op.sig.sigprovctx,
 501                                                      params);
 502     return 0;
 503 }
 504
 505 const OSSL_PARAM *EVP_PKEY_CTX_gettable_params(EVP_PKEY_CTX *ctx)
 506 {
 507     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 508             && ctx->op.sig.signature != NULL
 509             && ctx->op.sig.signature->gettable_ctx_params != NULL)
 510         return ctx->op.sig.signature->gettable_ctx_params();
 511
 512     return NULL;
 513 }
 514
 515 int EVP_PKEY_CTX_set_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 516 {
 517     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 518             && ctx->op.kex.exchprovctx != NULL
 519             && ctx->op.kex.exchange != NULL
 520             && ctx->op.kex.exchange->set_ctx_params != NULL)
 521         return ctx->op.kex.exchange->set_ctx_params(ctx->op.kex.exchprovctx,
 522                                                     params);
 523     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 524             && ctx->op.sig.sigprovctx != NULL
 525             && ctx->op.sig.signature != NULL
 526             && ctx->op.sig.signature->set_ctx_params != NULL)
 527         return ctx->op.sig.signature->set_ctx_params(ctx->op.sig.sigprovctx,
 528                                                      params);
 529     return 0;
 530 }
 531
 532 const OSSL_PARAM *EVP_PKEY_CTX_settable_params(EVP_PKEY_CTX *ctx)
 533 {
 534     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 535             && ctx->op.kex.exchange != NULL
 536             && ctx->op.kex.exchange->settable_ctx_params != NULL)
 537         return ctx->op.kex.exchange->settable_ctx_params();
 538     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 539             && ctx->op.sig.signature != NULL
 540             && ctx->op.sig.signature->settable_ctx_params != NULL)
 541         return ctx->op.sig.signature->settable_ctx_params();
 542
 543     return NULL;
 544 }
 545
 546 #ifndef OPENSSL_NO_DH
 547 int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad)
 548 {
 549     OSSL_PARAM dh_pad_params[2];
 550     unsigned int upad = pad;
 551
 552     /* We use EVP_PKEY_CTX_ctrl return values */
 553     if (ctx == NULL || !EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 554         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 555         return -2;
 556     }
 557
 558     /* TODO(3.0): Remove this eventually when no more legacy */
 559     if (ctx->op.kex.exchprovctx == NULL)
 560         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_DERIVE,
 561                                  EVP_PKEY_CTRL_DH_PAD, pad, NULL);
 562
 563     dh_pad_params[0] = OSSL_PARAM_construct_uint(OSSL_EXCHANGE_PARAM_PAD, &upad);
 564     dh_pad_params[1] = OSSL_PARAM_construct_end();
 565
 566     return EVP_PKEY_CTX_set_params(ctx, dh_pad_params);
 567 }
 568 #endif
 569
 570 int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **md)
 571 {
 572     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 573     /* 80 should be big enough */
 574     char name[80] = "";
 575     const EVP_MD *tmp;
 576
 577     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 578         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 579         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 580         return -2;
 581     }
 582
 583     /* TODO(3.0): Remove this eventually when no more legacy */
 584     if (ctx->op.sig.sigprovctx == NULL)
 585         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 586                                  EVP_PKEY_CTRL_GET_MD, 0, (void *)(md));
 587
 588     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 589                                             name,
 590                                             sizeof(name));
 591     *p++ = OSSL_PARAM_construct_end();
 592
 593     if (!EVP_PKEY_CTX_get_params(ctx, sig_md_params))
 594         return 0;
 595
 596     tmp = EVP_get_digestbyname(name);
 597     if (tmp == NULL)
 598         return 0;
 599
 600     *md = tmp;
 601
 602     return 1;
 603 }
 604
 605 int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
 606 {
 607     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 608     size_t mdsize;
 609     const char *name;
 610
 611     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 612         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 613         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 614         return -2;
 615     }
 616
 617     /* TODO(3.0): Remove this eventually when no more legacy */
 618     if (ctx->op.sig.sigprovctx == NULL)
 619         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 620                                  EVP_PKEY_CTRL_MD, 0, (void *)(md));
 621
 622     if (md == NULL) {
 623         name = "";
 624         mdsize = 0;
 625     } else {
 626         mdsize = EVP_MD_size(md);
 627         name = EVP_MD_name(md);
 628     }
 629
 630     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 631                                             /*
 632                                              * Cast away the const. This is read
 633                                              * only so should be safe
 634                                              */
 635                                             (char *)name,
 636                                             strlen(name) + 1);
 637     *p++ = OSSL_PARAM_construct_size_t(OSSL_SIGNATURE_PARAM_DIGEST_SIZE,
 638                                        &mdsize);
 639     *p++ = OSSL_PARAM_construct_end();
 640
 641     return EVP_PKEY_CTX_set_params(ctx, sig_md_params);
 642 }
 643
 644 static int legacy_ctrl_to_param(EVP_PKEY_CTX *ctx, int keytype, int optype,
 645                                 int cmd, int p1, void *p2)
 646 {
 647     switch (cmd) {
 648 #ifndef OPENSSL_NO_DH
 649     case EVP_PKEY_CTRL_DH_PAD:
 650         return EVP_PKEY_CTX_set_dh_pad(ctx, p1);
 651 #endif
 652     case EVP_PKEY_CTRL_MD:
 653         return EVP_PKEY_CTX_set_signature_md(ctx, p2);
 654     case EVP_PKEY_CTRL_GET_MD:
 655         return EVP_PKEY_CTX_get_signature_md(ctx, p2);
 656     }
 657     return 0;
 658 }
 659
 660 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 661                       int cmd, int p1, void *p2)
 662 {
 663     int ret;
 664
 665     if (ctx == NULL) {
 666         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 667         return -2;
 668     }
 669
 670     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 671             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 672                 && ctx->op.sig.sigprovctx != NULL))
 673         return legacy_ctrl_to_param(ctx, keytype, optype, cmd, p1, p2);
 674
 675     if (ctx->pmeth == NULL || ctx->pmeth->ctrl == NULL) {
 676         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 677         return -2;
 678     }
 679     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 680         return -1;
 681
 682     /* Skip the operation checks since this is called in a very early stage */
 683     if (ctx->pmeth->digest_custom != NULL)
 684         goto doit;
 685
 686     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 687         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 688         return -1;
 689     }
 690
 691     if ((optype != -1) && !(ctx->operation & optype)) {
 692         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 693         return -1;
 694     }
 695
 696  doit:
 697     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 698
 699     if (ret == -2)
 700         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 701
 702     return ret;
 703 }
 704
 705 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 706                              int cmd, uint64_t value)
 707 {
 708     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 709 }
 710
 711 static int legacy_ctrl_str_to_param(EVP_PKEY_CTX *ctx, const char *name,
 712                                     const char *value)
 713 {
 714 #ifndef OPENSSL_NO_DH
 715     if (strcmp(name, "dh_pad") == 0) {
 716         int pad;
 717
 718         pad = atoi(value);
 719         return EVP_PKEY_CTX_set_dh_pad(ctx, pad);
 720     }
 721 #endif
 722     if (strcmp(name, "digest") == 0) {
 723         int ret;
 724         EVP_MD *md;
 725
 726         if (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) || ctx->op.sig.signature == NULL)
 727             return 0;
 728         md = EVP_MD_fetch(ossl_provider_library_context(ctx->op.sig.signature->prov),
 729                           value, NULL);
 730         if (md == NULL)
 731             return 0;
 732         ret = EVP_PKEY_CTX_set_signature_md(ctx, md);
 733         EVP_MD_meth_free(md);
 734         return ret;
 735     }
 736
 737     return 0;
 738 }
 739
 740 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 741                           const char *name, const char *value)
 742 {
 743     if (ctx == NULL) {
 744         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 745         return -2;
 746     }
 747
 748     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 749             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 750                 && ctx->op.sig.sigprovctx != NULL))
 751         return legacy_ctrl_str_to_param(ctx, name, value);
 752
 753     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 754         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 755         return -2;
 756     }
 757     if (strcmp(name, "digest") == 0)
 758         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
 759                                value);
 760     return ctx->pmeth->ctrl_str(ctx, name, value);
 761 }
 762
 763 /* Utility functions to send a string of hex string to a ctrl */
 764
 765 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 766 {
 767     size_t len;
 768
 769     len = strlen(str);
 770     if (len > INT_MAX)
 771         return -1;
 772     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 773 }
 774
 775 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 776 {
 777     unsigned char *bin;
 778     long binlen;
 779     int rv = -1;
 780
 781     bin = OPENSSL_hexstr2buf(hex, &binlen);
 782     if (bin == NULL)
 783         return 0;
 784     if (binlen <= INT_MAX)
 785         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 786     OPENSSL_free(bin);
 787     return rv;
 788 }
 789
 790 /* Pass a message digest to a ctrl */
 791 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
 792 {
 793     const EVP_MD *m;
 794
 795     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
 796         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
 797         return 0;
 798     }
 799     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
 800 }
 801
 802 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 803 {
 804     return ctx->operation;
 805 }
 806
 807 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 808 {
 809     ctx->keygen_info = dat;
 810     ctx->keygen_info_count = datlen;
 811 }
 812
 813 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 814 {
 815     ctx->data = data;
 816 }
 817
 818 void *EVP_PKEY_CTX_get_data(const EVP_PKEY_CTX *ctx)
 819 {
 820     return ctx->data;
 821 }
 822
 823 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 824 {
 825     return ctx->pkey;
 826 }
 827
 828 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 829 {
 830     return ctx->peerkey;
 831 }
 832
 833 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 834 {
 835     ctx->app_data = data;
 836 }
 837
 838 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 839 {
 840     return ctx->app_data;
 841 }
 842
 843 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 844                             int (*init) (EVP_PKEY_CTX *ctx))
 845 {
 846     pmeth->init = init;
 847 }
 848
 849 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 850                             int (*copy) (EVP_PKEY_CTX *dst,
 851                                          const EVP_PKEY_CTX *src))
 852 {
 853     pmeth->copy = copy;
 854 }
 855
 856 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 857                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 858 {
 859     pmeth->cleanup = cleanup;
 860 }
 861
 862 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 863                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 864                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 865                                                  EVP_PKEY *pkey))
 866 {
 867     pmeth->paramgen_init = paramgen_init;
 868     pmeth->paramgen = paramgen;
 869 }
 870
 871 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 872                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 873                               int (*keygen) (EVP_PKEY_CTX *ctx,
 874                                              EVP_PKEY *pkey))
 875 {
 876     pmeth->keygen_init = keygen_init;
 877     pmeth->keygen = keygen;
 878 }
 879
 880 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 881                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 882                             int (*sign) (EVP_PKEY_CTX *ctx,
 883                                          unsigned char *sig, size_t *siglen,
 884                                          const unsigned char *tbs,
 885                                          size_t tbslen))
 886 {
 887     pmeth->sign_init = sign_init;
 888     pmeth->sign = sign;
 889 }
 890
 891 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 892                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 893                               int (*verify) (EVP_PKEY_CTX *ctx,
 894                                              const unsigned char *sig,
 895                                              size_t siglen,
 896                                              const unsigned char *tbs,
 897                                              size_t tbslen))
 898 {
 899     pmeth->verify_init = verify_init;
 900     pmeth->verify = verify;
 901 }
 902
 903 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 904                                       int (*verify_recover_init) (EVP_PKEY_CTX
 905                                                                   *ctx),
 906                                       int (*verify_recover) (EVP_PKEY_CTX
 907                                                              *ctx,
 908                                                              unsigned char
 909                                                              *sig,
 910                                                              size_t *siglen,
 911                                                              const unsigned
 912                                                              char *tbs,
 913                                                              size_t tbslen))
 914 {
 915     pmeth->verify_recover_init = verify_recover_init;
 916     pmeth->verify_recover = verify_recover;
 917 }
 918
 919 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 920                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 921                                                     EVP_MD_CTX *mctx),
 922                                int (*signctx) (EVP_PKEY_CTX *ctx,
 923                                                unsigned char *sig,
 924                                                size_t *siglen,
 925                                                EVP_MD_CTX *mctx))
 926 {
 927     pmeth->signctx_init = signctx_init;
 928     pmeth->signctx = signctx;
 929 }
 930
 931 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 932                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 933                                                         EVP_MD_CTX *mctx),
 934                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 935                                                    const unsigned char *sig,
 936                                                    int siglen,
 937                                                    EVP_MD_CTX *mctx))
 938 {
 939     pmeth->verifyctx_init = verifyctx_init;
 940     pmeth->verifyctx = verifyctx;
 941 }
 942
 943 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 944                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 945                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 946                                                  unsigned char *out,
 947                                                  size_t *outlen,
 948                                                  const unsigned char *in,
 949                                                  size_t inlen))
 950 {
 951     pmeth->encrypt_init = encrypt_init;
 952     pmeth->encrypt = encryptfn;
 953 }
 954
 955 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 956                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 957                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 958                                                unsigned char *out,
 959                                                size_t *outlen,
 960                                                const unsigned char *in,
 961                                                size_t inlen))
 962 {
 963     pmeth->decrypt_init = decrypt_init;
 964     pmeth->decrypt = decrypt;
 965 }
 966
 967 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 968                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 969                               int (*derive) (EVP_PKEY_CTX *ctx,
 970                                              unsigned char *key,
 971                                              size_t *keylen))
 972 {
 973     pmeth->derive_init = derive_init;
 974     pmeth->derive = derive;
 975 }
 976
 977 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 978                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 979                                          void *p2),
 980                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 981                                              const char *type,
 982                                              const char *value))
 983 {
 984     pmeth->ctrl = ctrl;
 985     pmeth->ctrl_str = ctrl_str;
 986 }
 987
 988 void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
 989                              int (*check) (EVP_PKEY *pkey))
 990 {
 991     pmeth->check = check;
 992 }
 993
 994 void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
 995                                     int (*check) (EVP_PKEY *pkey))
 996 {
 997     pmeth->public_check = check;
 998 }
 999
1000 void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
1001                                    int (*check) (EVP_PKEY *pkey))
1002 {
1003     pmeth->param_check = check;
1004 }
1005
1006 void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
1007                                      int (*digest_custom) (EVP_PKEY_CTX *ctx,
1008                                                            EVP_MD_CTX *mctx))
1009 {
1010     pmeth->digest_custom = digest_custom;
1011 }
1012
1013 void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
1014                             int (**pinit) (EVP_PKEY_CTX *ctx))
1015 {
1016     *pinit = pmeth->init;
1017 }
1018
1019 void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
1020                             int (**pcopy) (EVP_PKEY_CTX *dst,
1021                                            const EVP_PKEY_CTX *src))
1022 {
1023     *pcopy = pmeth->copy;
1024 }
1025
1026 void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
1027                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
1028 {
1029     *pcleanup = pmeth->cleanup;
1030 }
1031
1032 void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
1033                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
1034                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
1035                                                    EVP_PKEY *pkey))
1036 {
1037     if (pparamgen_init)
1038         *pparamgen_init = pmeth->paramgen_init;
1039     if (pparamgen)
1040         *pparamgen = pmeth->paramgen;
1041 }
1042
1043 void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
1044                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
1045                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
1046                                                EVP_PKEY *pkey))
1047 {
1048     if (pkeygen_init)
1049         *pkeygen_init = pmeth->keygen_init;
1050     if (pkeygen)
1051         *pkeygen = pmeth->keygen;
1052 }
1053
1054 void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
1055                             int (**psign_init) (EVP_PKEY_CTX *ctx),
1056                             int (**psign) (EVP_PKEY_CTX *ctx,
1057                                            unsigned char *sig, size_t *siglen,
1058                                            const unsigned char *tbs,
1059                                            size_t tbslen))
1060 {
1061     if (psign_init)
1062         *psign_init = pmeth->sign_init;
1063     if (psign)
1064         *psign = pmeth->sign;
1065 }
1066
1067 void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
1068                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
1069                               int (**pverify) (EVP_PKEY_CTX *ctx,
1070                                                const unsigned char *sig,
1071                                                size_t siglen,
1072                                                const unsigned char *tbs,
1073                                                size_t tbslen))
1074 {
1075     if (pverify_init)
1076         *pverify_init = pmeth->verify_init;
1077     if (pverify)
1078         *pverify = pmeth->verify;
1079 }
1080
1081 void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
1082                                       int (**pverify_recover_init) (EVP_PKEY_CTX
1083                                                                     *ctx),
1084                                       int (**pverify_recover) (EVP_PKEY_CTX
1085                                                                *ctx,
1086                                                                unsigned char
1087                                                                *sig,
1088                                                                size_t *siglen,
1089                                                                const unsigned
1090                                                                char *tbs,
1091                                                                size_t tbslen))
1092 {
1093     if (pverify_recover_init)
1094         *pverify_recover_init = pmeth->verify_recover_init;
1095     if (pverify_recover)
1096         *pverify_recover = pmeth->verify_recover;
1097 }
1098
1099 void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
1100                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
1101                                                       EVP_MD_CTX *mctx),
1102                                int (**psignctx) (EVP_PKEY_CTX *ctx,
1103                                                  unsigned char *sig,
1104                                                  size_t *siglen,
1105                                                  EVP_MD_CTX *mctx))
1106 {
1107     if (psignctx_init)
1108         *psignctx_init = pmeth->signctx_init;
1109     if (psignctx)
1110         *psignctx = pmeth->signctx;
1111 }
1112
1113 void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
1114                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
1115                                                           EVP_MD_CTX *mctx),
1116                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
1117                                                      const unsigned char *sig,
1118                                                      int siglen,
1119                                                      EVP_MD_CTX *mctx))
1120 {
1121     if (pverifyctx_init)
1122         *pverifyctx_init = pmeth->verifyctx_init;
1123     if (pverifyctx)
1124         *pverifyctx = pmeth->verifyctx;
1125 }
1126
1127 void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
1128                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
1129                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
1130                                                    unsigned char *out,
1131                                                    size_t *outlen,
1132                                                    const unsigned char *in,
1133                                                    size_t inlen))
1134 {
1135     if (pencrypt_init)
1136         *pencrypt_init = pmeth->encrypt_init;
1137     if (pencryptfn)
1138         *pencryptfn = pmeth->encrypt;
1139 }
1140
1141 void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
1142                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
1143                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
1144                                                  unsigned char *out,
1145                                                  size_t *outlen,
1146                                                  const unsigned char *in,
1147                                                  size_t inlen))
1148 {
1149     if (pdecrypt_init)
1150         *pdecrypt_init = pmeth->decrypt_init;
1151     if (pdecrypt)
1152         *pdecrypt = pmeth->decrypt;
1153 }
1154
1155 void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
1156                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
1157                               int (**pderive) (EVP_PKEY_CTX *ctx,
1158                                                unsigned char *key,
1159                                                size_t *keylen))
1160 {
1161     if (pderive_init)
1162         *pderive_init = pmeth->derive_init;
1163     if (pderive)
1164         *pderive = pmeth->derive;
1165 }
1166
1167 void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
1168                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1169                                            void *p2),
1170                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
1171                                                const char *type,
1172                                                const char *value))
1173 {
1174     if (pctrl)
1175         *pctrl = pmeth->ctrl;
1176     if (pctrl_str)
1177         *pctrl_str = pmeth->ctrl_str;
1178 }
1179
1180 void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
1181                              int (**pcheck) (EVP_PKEY *pkey))
1182 {
1183     if (pcheck != NULL)
1184         *pcheck = pmeth->check;
1185 }
1186
1187 void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
1188                                     int (**pcheck) (EVP_PKEY *pkey))
1189 {
1190     if (pcheck != NULL)
1191         *pcheck = pmeth->public_check;
1192 }
1193
1194 void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
1195                                    int (**pcheck) (EVP_PKEY *pkey))
1196 {
1197     if (pcheck != NULL)
1198         *pcheck = pmeth->param_check;
1199 }
1200
1201 void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
1202                                      int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
1203                                                              EVP_MD_CTX *mctx))
1204 {
1205     if (pdigest_custom != NULL)
1206         *pdigest_custom = pmeth->digest_custom;
1207 }