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     } else if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) {
 241         if (ctx->op.ciph.ciphprovctx != NULL && ctx->op.ciph.cipher != NULL)
 242             ctx->op.ciph.cipher->freectx(ctx->op.ciph.ciphprovctx);
 243         EVP_ASYM_CIPHER_free(ctx->op.ciph.cipher);
 244         ctx->op.ciph.ciphprovctx = NULL;
 245         ctx->op.ciph.cipher = NULL;
 246     }
 247 }
 248
 249 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 250 {
 251     EVP_PKEY_METHOD *pmeth;
 252
 253     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 254     if (pmeth == NULL) {
 255         EVPerr(EVP_F_EVP_PKEY_METH_NEW, ERR_R_MALLOC_FAILURE);
 256         return NULL;
 257     }
 258
 259     pmeth->pkey_id = id;
 260     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 261     return pmeth;
 262 }
 263
 264 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 265                              const EVP_PKEY_METHOD *meth)
 266 {
 267     if (ppkey_id)
 268         *ppkey_id = meth->pkey_id;
 269     if (pflags)
 270         *pflags = meth->flags;
 271 }
 272
 273 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 274 {
 275
 276     dst->init = src->init;
 277     dst->copy = src->copy;
 278     dst->cleanup = src->cleanup;
 279
 280     dst->paramgen_init = src->paramgen_init;
 281     dst->paramgen = src->paramgen;
 282
 283     dst->keygen_init = src->keygen_init;
 284     dst->keygen = src->keygen;
 285
 286     dst->sign_init = src->sign_init;
 287     dst->sign = src->sign;
 288
 289     dst->verify_init = src->verify_init;
 290     dst->verify = src->verify;
 291
 292     dst->verify_recover_init = src->verify_recover_init;
 293     dst->verify_recover = src->verify_recover;
 294
 295     dst->signctx_init = src->signctx_init;
 296     dst->signctx = src->signctx;
 297
 298     dst->verifyctx_init = src->verifyctx_init;
 299     dst->verifyctx = src->verifyctx;
 300
 301     dst->encrypt_init = src->encrypt_init;
 302     dst->encrypt = src->encrypt;
 303
 304     dst->decrypt_init = src->decrypt_init;
 305     dst->decrypt = src->decrypt;
 306
 307     dst->derive_init = src->derive_init;
 308     dst->derive = src->derive;
 309
 310     dst->ctrl = src->ctrl;
 311     dst->ctrl_str = src->ctrl_str;
 312
 313     dst->check = src->check;
 314 }
 315
 316 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 317 {
 318     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 319         OPENSSL_free(pmeth);
 320 }
 321
 322 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 323 {
 324     return int_ctx_new(NULL, pkey, e, NULL, NULL, -1);
 325 }
 326
 327 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 328 {
 329     return int_ctx_new(NULL, NULL, e, NULL, NULL, id);
 330 }
 331
 332 EVP_PKEY_CTX *EVP_PKEY_CTX_new_provided(OPENSSL_CTX *libctx,
 333                                         const char *name,
 334                                         const char *propquery)
 335 {
 336     return int_ctx_new(libctx, NULL, NULL, name, propquery, -1);
 337 }
 338
 339 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(const EVP_PKEY_CTX *pctx)
 340 {
 341     EVP_PKEY_CTX *rctx;
 342
 343     if (((pctx->pmeth == NULL) || (pctx->pmeth->copy == NULL))
 344             && ((EVP_PKEY_CTX_IS_DERIVE_OP(pctx)
 345                  && pctx->op.kex.exchprovctx == NULL)
 346                 || (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)
 347                     && pctx->op.sig.sigprovctx == NULL)))
 348         return NULL;
 349 #ifndef OPENSSL_NO_ENGINE
 350     /* Make sure it's safe to copy a pkey context using an ENGINE */
 351     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 352         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 353         return 0;
 354     }
 355 #endif
 356     rctx = OPENSSL_zalloc(sizeof(*rctx));
 357     if (rctx == NULL) {
 358         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_MALLOC_FAILURE);
 359         return NULL;
 360     }
 361
 362     if (pctx->pkey != NULL)
 363         EVP_PKEY_up_ref(pctx->pkey);
 364     rctx->pkey = pctx->pkey;
 365     rctx->operation = pctx->operation;
 366     rctx->libctx = pctx->libctx;
 367     rctx->algorithm = pctx->algorithm;
 368     rctx->propquery = pctx->propquery;
 369
 370     if (EVP_PKEY_CTX_IS_DERIVE_OP(pctx)) {
 371         if (pctx->op.kex.exchange != NULL) {
 372             rctx->op.kex.exchange = pctx->op.kex.exchange;
 373             if (!EVP_KEYEXCH_up_ref(rctx->op.kex.exchange)) {
 374                 OPENSSL_free(rctx);
 375                 return NULL;
 376             }
 377         }
 378         if (pctx->op.kex.exchprovctx != NULL) {
 379             if (!ossl_assert(pctx->op.kex.exchange != NULL))
 380                 return NULL;
 381             rctx->op.kex.exchprovctx
 382                 = pctx->op.kex.exchange->dupctx(pctx->op.kex.exchprovctx);
 383             if (rctx->op.kex.exchprovctx == NULL) {
 384                 EVP_KEYEXCH_free(rctx->op.kex.exchange);
 385                 OPENSSL_free(rctx);
 386                 return NULL;
 387             }
 388             return rctx;
 389         }
 390     } else if (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)) {
 391         if (pctx->op.sig.signature != NULL) {
 392             rctx->op.sig.signature = pctx->op.sig.signature;
 393             if (!EVP_SIGNATURE_up_ref(rctx->op.sig.signature)) {
 394                 OPENSSL_free(rctx);
 395                 return NULL;
 396             }
 397         }
 398         if (pctx->op.sig.sigprovctx != NULL) {
 399             if (!ossl_assert(pctx->op.sig.signature != NULL))
 400                 return NULL;
 401             rctx->op.sig.sigprovctx
 402                 = pctx->op.sig.signature->dupctx(pctx->op.sig.sigprovctx);
 403             if (rctx->op.sig.sigprovctx == NULL) {
 404                 EVP_SIGNATURE_free(rctx->op.sig.signature);
 405                 OPENSSL_free(rctx);
 406                 return NULL;
 407             }
 408             return rctx;
 409         }
 410     } else if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(pctx)) {
 411         if (pctx->op.ciph.cipher != NULL) {
 412             rctx->op.ciph.cipher = pctx->op.ciph.cipher;
 413             if (!EVP_ASYM_CIPHER_up_ref(rctx->op.ciph.cipher)) {
 414                 OPENSSL_free(rctx);
 415                 return NULL;
 416             }
 417         }
 418         if (pctx->op.ciph.ciphprovctx != NULL) {
 419             if (!ossl_assert(pctx->op.ciph.cipher != NULL))
 420                 return NULL;
 421             rctx->op.ciph.ciphprovctx
 422                 = pctx->op.ciph.cipher->dupctx(pctx->op.ciph.ciphprovctx);
 423             if (rctx->op.ciph.ciphprovctx == NULL) {
 424                 EVP_ASYM_CIPHER_free(rctx->op.ciph.cipher);
 425                 OPENSSL_free(rctx);
 426                 return NULL;
 427             }
 428             return rctx;
 429         }
 430     }
 431
 432     rctx->pmeth = pctx->pmeth;
 433 #ifndef OPENSSL_NO_ENGINE
 434     rctx->engine = pctx->engine;
 435 #endif
 436
 437     if (pctx->peerkey)
 438         EVP_PKEY_up_ref(pctx->peerkey);
 439     rctx->peerkey = pctx->peerkey;
 440
 441     if (pctx->pmeth->copy(rctx, pctx) > 0)
 442         return rctx;
 443
 444     rctx->pmeth = NULL;
 445     EVP_PKEY_CTX_free(rctx);
 446     return NULL;
 447
 448 }
 449
 450 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 451 {
 452     if (app_pkey_methods == NULL) {
 453         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 454         if (app_pkey_methods == NULL){
 455             EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 456             return 0;
 457         }
 458     }
 459     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth)) {
 460         EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 461         return 0;
 462     }
 463     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 464     return 1;
 465 }
 466
 467 void evp_app_cleanup_int(void)
 468 {
 469     if (app_pkey_methods != NULL)
 470         sk_EVP_PKEY_METHOD_pop_free(app_pkey_methods, EVP_PKEY_meth_free);
 471 }
 472
 473 int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth)
 474 {
 475     const EVP_PKEY_METHOD *ret;
 476
 477     ret = sk_EVP_PKEY_METHOD_delete_ptr(app_pkey_methods, pmeth);
 478
 479     return ret == NULL ? 0 : 1;
 480 }
 481
 482 size_t EVP_PKEY_meth_get_count(void)
 483 {
 484     size_t rv = OSSL_NELEM(standard_methods);
 485
 486     if (app_pkey_methods)
 487         rv += sk_EVP_PKEY_METHOD_num(app_pkey_methods);
 488     return rv;
 489 }
 490
 491 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx)
 492 {
 493     if (idx < OSSL_NELEM(standard_methods))
 494         return (standard_methods[idx])();
 495     if (app_pkey_methods == NULL)
 496         return NULL;
 497     idx -= OSSL_NELEM(standard_methods);
 498     if (idx >= (size_t)sk_EVP_PKEY_METHOD_num(app_pkey_methods))
 499         return NULL;
 500     return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 501 }
 502
 503 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 504 {
 505     if (ctx == NULL)
 506         return;
 507     if (ctx->pmeth && ctx->pmeth->cleanup)
 508         ctx->pmeth->cleanup(ctx);
 509
 510     evp_pkey_ctx_free_old_ops(ctx);
 511     EVP_KEYMGMT_free(ctx->keymgmt);
 512
 513     EVP_PKEY_free(ctx->pkey);
 514     EVP_PKEY_free(ctx->peerkey);
 515 #ifndef OPENSSL_NO_ENGINE
 516     ENGINE_finish(ctx->engine);
 517 #endif
 518     OPENSSL_free(ctx);
 519 }
 520
 521 int EVP_PKEY_CTX_get_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 522 {
 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->get_ctx_params != NULL)
 527         return ctx->op.sig.signature->get_ctx_params(ctx->op.sig.sigprovctx,
 528                                                      params);
 529     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 530             && ctx->op.ciph.ciphprovctx != NULL
 531             && ctx->op.ciph.cipher != NULL
 532             && ctx->op.ciph.cipher->get_ctx_params != NULL)
 533         return ctx->op.ciph.cipher->get_ctx_params(ctx->op.ciph.ciphprovctx,
 534                                                    params);
 535     return 0;
 536 }
 537
 538 const OSSL_PARAM *EVP_PKEY_CTX_gettable_params(EVP_PKEY_CTX *ctx)
 539 {
 540     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 541             && ctx->op.sig.signature != NULL
 542             && ctx->op.sig.signature->gettable_ctx_params != NULL)
 543         return ctx->op.sig.signature->gettable_ctx_params();
 544
 545     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 546             && ctx->op.ciph.cipher != NULL
 547             && ctx->op.ciph.cipher->gettable_ctx_params != NULL)
 548         return ctx->op.ciph.cipher->gettable_ctx_params();
 549
 550     return NULL;
 551 }
 552
 553 int EVP_PKEY_CTX_set_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 554 {
 555     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 556             && ctx->op.kex.exchprovctx != NULL
 557             && ctx->op.kex.exchange != NULL
 558             && ctx->op.kex.exchange->set_ctx_params != NULL)
 559         return ctx->op.kex.exchange->set_ctx_params(ctx->op.kex.exchprovctx,
 560                                                     params);
 561     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 562             && ctx->op.sig.sigprovctx != NULL
 563             && ctx->op.sig.signature != NULL
 564             && ctx->op.sig.signature->set_ctx_params != NULL)
 565         return ctx->op.sig.signature->set_ctx_params(ctx->op.sig.sigprovctx,
 566                                                      params);
 567     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 568             && ctx->op.ciph.ciphprovctx != NULL
 569             && ctx->op.ciph.cipher != NULL
 570             && ctx->op.ciph.cipher->set_ctx_params != NULL)
 571         return ctx->op.ciph.cipher->set_ctx_params(ctx->op.ciph.ciphprovctx,
 572                                                      params);
 573     return 0;
 574 }
 575
 576 const OSSL_PARAM *EVP_PKEY_CTX_settable_params(EVP_PKEY_CTX *ctx)
 577 {
 578     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 579             && ctx->op.kex.exchange != NULL
 580             && ctx->op.kex.exchange->settable_ctx_params != NULL)
 581         return ctx->op.kex.exchange->settable_ctx_params();
 582     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 583             && ctx->op.sig.signature != NULL
 584             && ctx->op.sig.signature->settable_ctx_params != NULL)
 585         return ctx->op.sig.signature->settable_ctx_params();
 586     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 587             && ctx->op.ciph.cipher != NULL
 588             && ctx->op.ciph.cipher->settable_ctx_params != NULL)
 589         return ctx->op.ciph.cipher->settable_ctx_params();
 590
 591     return NULL;
 592 }
 593
 594 #ifndef OPENSSL_NO_DH
 595 int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad)
 596 {
 597     OSSL_PARAM dh_pad_params[2];
 598     unsigned int upad = pad;
 599
 600     /* We use EVP_PKEY_CTX_ctrl return values */
 601     if (ctx == NULL || !EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 602         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 603         return -2;
 604     }
 605
 606     /* TODO(3.0): Remove this eventually when no more legacy */
 607     if (ctx->op.kex.exchprovctx == NULL)
 608         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_DERIVE,
 609                                  EVP_PKEY_CTRL_DH_PAD, pad, NULL);
 610
 611     dh_pad_params[0] = OSSL_PARAM_construct_uint(OSSL_EXCHANGE_PARAM_PAD, &upad);
 612     dh_pad_params[1] = OSSL_PARAM_construct_end();
 613
 614     return EVP_PKEY_CTX_set_params(ctx, dh_pad_params);
 615 }
 616 #endif
 617
 618 int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **md)
 619 {
 620     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 621     /* 80 should be big enough */
 622     char name[80] = "";
 623     const EVP_MD *tmp;
 624
 625     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 626         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 627         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 628         return -2;
 629     }
 630
 631     /* TODO(3.0): Remove this eventually when no more legacy */
 632     if (ctx->op.sig.sigprovctx == NULL)
 633         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 634                                  EVP_PKEY_CTRL_GET_MD, 0, (void *)(md));
 635
 636     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 637                                             name,
 638                                             sizeof(name));
 639     *p++ = OSSL_PARAM_construct_end();
 640
 641     if (!EVP_PKEY_CTX_get_params(ctx, sig_md_params))
 642         return 0;
 643
 644     tmp = evp_get_digestbyname_ex(ctx->libctx, name);
 645     if (tmp == NULL)
 646         return 0;
 647
 648     *md = tmp;
 649
 650     return 1;
 651 }
 652
 653 int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
 654 {
 655     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 656     size_t mdsize;
 657     const char *name;
 658
 659     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 660         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 661         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 662         return -2;
 663     }
 664
 665     /* TODO(3.0): Remove this eventually when no more legacy */
 666     if (ctx->op.sig.sigprovctx == NULL)
 667         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 668                                  EVP_PKEY_CTRL_MD, 0, (void *)(md));
 669
 670     if (md == NULL) {
 671         name = "";
 672         mdsize = 0;
 673     } else {
 674         mdsize = EVP_MD_size(md);
 675         name = EVP_MD_name(md);
 676     }
 677
 678     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 679                                             /*
 680                                              * Cast away the const. This is read
 681                                              * only so should be safe
 682                                              */
 683                                             (char *)name,
 684                                             strlen(name) + 1);
 685     *p++ = OSSL_PARAM_construct_size_t(OSSL_SIGNATURE_PARAM_DIGEST_SIZE,
 686                                        &mdsize);
 687     *p++ = OSSL_PARAM_construct_end();
 688
 689     return EVP_PKEY_CTX_set_params(ctx, sig_md_params);
 690 }
 691
 692 static int legacy_ctrl_to_param(EVP_PKEY_CTX *ctx, int keytype, int optype,
 693                                 int cmd, int p1, void *p2)
 694 {
 695     switch (cmd) {
 696 #ifndef OPENSSL_NO_DH
 697     case EVP_PKEY_CTRL_DH_PAD:
 698         return EVP_PKEY_CTX_set_dh_pad(ctx, p1);
 699 #endif
 700     case EVP_PKEY_CTRL_MD:
 701         return EVP_PKEY_CTX_set_signature_md(ctx, p2);
 702     case EVP_PKEY_CTRL_GET_MD:
 703         return EVP_PKEY_CTX_get_signature_md(ctx, p2);
 704     }
 705     return 0;
 706 }
 707
 708 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 709                       int cmd, int p1, void *p2)
 710 {
 711     int ret;
 712
 713     if (ctx == NULL) {
 714         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 715         return -2;
 716     }
 717
 718     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 719             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 720                 && ctx->op.sig.sigprovctx != NULL)
 721             || (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 722                 && ctx->op.ciph.ciphprovctx != NULL))
 723         return legacy_ctrl_to_param(ctx, keytype, optype, cmd, p1, p2);
 724
 725     if (ctx->pmeth == NULL || ctx->pmeth->ctrl == NULL) {
 726         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 727         return -2;
 728     }
 729     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 730         return -1;
 731
 732     /* Skip the operation checks since this is called in a very early stage */
 733     if (ctx->pmeth->digest_custom != NULL)
 734         goto doit;
 735
 736     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 737         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 738         return -1;
 739     }
 740
 741     if ((optype != -1) && !(ctx->operation & optype)) {
 742         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 743         return -1;
 744     }
 745
 746  doit:
 747     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 748
 749     if (ret == -2)
 750         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 751
 752     return ret;
 753 }
 754
 755 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 756                              int cmd, uint64_t value)
 757 {
 758     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 759 }
 760
 761 static int legacy_ctrl_str_to_param(EVP_PKEY_CTX *ctx, const char *name,
 762                                     const char *value)
 763 {
 764 #ifndef OPENSSL_NO_DH
 765     if (strcmp(name, "dh_pad") == 0) {
 766         int pad;
 767
 768         pad = atoi(value);
 769         return EVP_PKEY_CTX_set_dh_pad(ctx, pad);
 770     }
 771 #endif
 772     if (strcmp(name, "digest") == 0) {
 773         int ret;
 774         EVP_MD *md;
 775
 776         if (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) || ctx->op.sig.signature == NULL)
 777             return 0;
 778         md = EVP_MD_fetch(ossl_provider_library_context(ctx->op.sig.signature->prov),
 779                           value, NULL);
 780         if (md == NULL)
 781             return 0;
 782         ret = EVP_PKEY_CTX_set_signature_md(ctx, md);
 783         EVP_MD_meth_free(md);
 784         return ret;
 785     }
 786
 787     return 0;
 788 }
 789
 790 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 791                           const char *name, const char *value)
 792 {
 793     if (ctx == NULL) {
 794         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 795         return -2;
 796     }
 797
 798     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 799             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 800                 && ctx->op.sig.sigprovctx != NULL)
 801             || (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 802                 && ctx->op.ciph.ciphprovctx != NULL))
 803         return legacy_ctrl_str_to_param(ctx, name, value);
 804
 805     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 806         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 807         return -2;
 808     }
 809     if (strcmp(name, "digest") == 0)
 810         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
 811                                value);
 812     return ctx->pmeth->ctrl_str(ctx, name, value);
 813 }
 814
 815 /* Utility functions to send a string of hex string to a ctrl */
 816
 817 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 818 {
 819     size_t len;
 820
 821     len = strlen(str);
 822     if (len > INT_MAX)
 823         return -1;
 824     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 825 }
 826
 827 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 828 {
 829     unsigned char *bin;
 830     long binlen;
 831     int rv = -1;
 832
 833     bin = OPENSSL_hexstr2buf(hex, &binlen);
 834     if (bin == NULL)
 835         return 0;
 836     if (binlen <= INT_MAX)
 837         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 838     OPENSSL_free(bin);
 839     return rv;
 840 }
 841
 842 /* Pass a message digest to a ctrl */
 843 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
 844 {
 845     const EVP_MD *m;
 846
 847     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
 848         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
 849         return 0;
 850     }
 851     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
 852 }
 853
 854 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 855 {
 856     return ctx->operation;
 857 }
 858
 859 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 860 {
 861     ctx->keygen_info = dat;
 862     ctx->keygen_info_count = datlen;
 863 }
 864
 865 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 866 {
 867     ctx->data = data;
 868 }
 869
 870 void *EVP_PKEY_CTX_get_data(const EVP_PKEY_CTX *ctx)
 871 {
 872     return ctx->data;
 873 }
 874
 875 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 876 {
 877     return ctx->pkey;
 878 }
 879
 880 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 881 {
 882     return ctx->peerkey;
 883 }
 884
 885 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 886 {
 887     ctx->app_data = data;
 888 }
 889
 890 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 891 {
 892     return ctx->app_data;
 893 }
 894
 895 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 896                             int (*init) (EVP_PKEY_CTX *ctx))
 897 {
 898     pmeth->init = init;
 899 }
 900
 901 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 902                             int (*copy) (EVP_PKEY_CTX *dst,
 903                                          const EVP_PKEY_CTX *src))
 904 {
 905     pmeth->copy = copy;
 906 }
 907
 908 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 909                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 910 {
 911     pmeth->cleanup = cleanup;
 912 }
 913
 914 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 915                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 916                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 917                                                  EVP_PKEY *pkey))
 918 {
 919     pmeth->paramgen_init = paramgen_init;
 920     pmeth->paramgen = paramgen;
 921 }
 922
 923 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 924                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 925                               int (*keygen) (EVP_PKEY_CTX *ctx,
 926                                              EVP_PKEY *pkey))
 927 {
 928     pmeth->keygen_init = keygen_init;
 929     pmeth->keygen = keygen;
 930 }
 931
 932 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 933                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 934                             int (*sign) (EVP_PKEY_CTX *ctx,
 935                                          unsigned char *sig, size_t *siglen,
 936                                          const unsigned char *tbs,
 937                                          size_t tbslen))
 938 {
 939     pmeth->sign_init = sign_init;
 940     pmeth->sign = sign;
 941 }
 942
 943 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 944                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 945                               int (*verify) (EVP_PKEY_CTX *ctx,
 946                                              const unsigned char *sig,
 947                                              size_t siglen,
 948                                              const unsigned char *tbs,
 949                                              size_t tbslen))
 950 {
 951     pmeth->verify_init = verify_init;
 952     pmeth->verify = verify;
 953 }
 954
 955 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 956                                       int (*verify_recover_init) (EVP_PKEY_CTX
 957                                                                   *ctx),
 958                                       int (*verify_recover) (EVP_PKEY_CTX
 959                                                              *ctx,
 960                                                              unsigned char
 961                                                              *sig,
 962                                                              size_t *siglen,
 963                                                              const unsigned
 964                                                              char *tbs,
 965                                                              size_t tbslen))
 966 {
 967     pmeth->verify_recover_init = verify_recover_init;
 968     pmeth->verify_recover = verify_recover;
 969 }
 970
 971 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 972                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 973                                                     EVP_MD_CTX *mctx),
 974                                int (*signctx) (EVP_PKEY_CTX *ctx,
 975                                                unsigned char *sig,
 976                                                size_t *siglen,
 977                                                EVP_MD_CTX *mctx))
 978 {
 979     pmeth->signctx_init = signctx_init;
 980     pmeth->signctx = signctx;
 981 }
 982
 983 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 984                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 985                                                         EVP_MD_CTX *mctx),
 986                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 987                                                    const unsigned char *sig,
 988                                                    int siglen,
 989                                                    EVP_MD_CTX *mctx))
 990 {
 991     pmeth->verifyctx_init = verifyctx_init;
 992     pmeth->verifyctx = verifyctx;
 993 }
 994
 995 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 996                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 997                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 998                                                  unsigned char *out,
 999                                                  size_t *outlen,
1000                                                  const unsigned char *in,
1001                                                  size_t inlen))
1002 {
1003     pmeth->encrypt_init = encrypt_init;
1004     pmeth->encrypt = encryptfn;
1005 }
1006
1007 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
1008                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
1009                                int (*decrypt) (EVP_PKEY_CTX *ctx,
1010                                                unsigned char *out,
1011                                                size_t *outlen,
1012                                                const unsigned char *in,
1013                                                size_t inlen))
1014 {
1015     pmeth->decrypt_init = decrypt_init;
1016     pmeth->decrypt = decrypt;
1017 }
1018
1019 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
1020                               int (*derive_init) (EVP_PKEY_CTX *ctx),
1021                               int (*derive) (EVP_PKEY_CTX *ctx,
1022                                              unsigned char *key,
1023                                              size_t *keylen))
1024 {
1025     pmeth->derive_init = derive_init;
1026     pmeth->derive = derive;
1027 }
1028
1029 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
1030                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1031                                          void *p2),
1032                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
1033                                              const char *type,
1034                                              const char *value))
1035 {
1036     pmeth->ctrl = ctrl;
1037     pmeth->ctrl_str = ctrl_str;
1038 }
1039
1040 void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
1041                              int (*check) (EVP_PKEY *pkey))
1042 {
1043     pmeth->check = check;
1044 }
1045
1046 void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
1047                                     int (*check) (EVP_PKEY *pkey))
1048 {
1049     pmeth->public_check = check;
1050 }
1051
1052 void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
1053                                    int (*check) (EVP_PKEY *pkey))
1054 {
1055     pmeth->param_check = check;
1056 }
1057
1058 void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
1059                                      int (*digest_custom) (EVP_PKEY_CTX *ctx,
1060                                                            EVP_MD_CTX *mctx))
1061 {
1062     pmeth->digest_custom = digest_custom;
1063 }
1064
1065 void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
1066                             int (**pinit) (EVP_PKEY_CTX *ctx))
1067 {
1068     *pinit = pmeth->init;
1069 }
1070
1071 void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
1072                             int (**pcopy) (EVP_PKEY_CTX *dst,
1073                                            const EVP_PKEY_CTX *src))
1074 {
1075     *pcopy = pmeth->copy;
1076 }
1077
1078 void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
1079                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
1080 {
1081     *pcleanup = pmeth->cleanup;
1082 }
1083
1084 void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
1085                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
1086                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
1087                                                    EVP_PKEY *pkey))
1088 {
1089     if (pparamgen_init)
1090         *pparamgen_init = pmeth->paramgen_init;
1091     if (pparamgen)
1092         *pparamgen = pmeth->paramgen;
1093 }
1094
1095 void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
1096                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
1097                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
1098                                                EVP_PKEY *pkey))
1099 {
1100     if (pkeygen_init)
1101         *pkeygen_init = pmeth->keygen_init;
1102     if (pkeygen)
1103         *pkeygen = pmeth->keygen;
1104 }
1105
1106 void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
1107                             int (**psign_init) (EVP_PKEY_CTX *ctx),
1108                             int (**psign) (EVP_PKEY_CTX *ctx,
1109                                            unsigned char *sig, size_t *siglen,
1110                                            const unsigned char *tbs,
1111                                            size_t tbslen))
1112 {
1113     if (psign_init)
1114         *psign_init = pmeth->sign_init;
1115     if (psign)
1116         *psign = pmeth->sign;
1117 }
1118
1119 void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
1120                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
1121                               int (**pverify) (EVP_PKEY_CTX *ctx,
1122                                                const unsigned char *sig,
1123                                                size_t siglen,
1124                                                const unsigned char *tbs,
1125                                                size_t tbslen))
1126 {
1127     if (pverify_init)
1128         *pverify_init = pmeth->verify_init;
1129     if (pverify)
1130         *pverify = pmeth->verify;
1131 }
1132
1133 void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
1134                                       int (**pverify_recover_init) (EVP_PKEY_CTX
1135                                                                     *ctx),
1136                                       int (**pverify_recover) (EVP_PKEY_CTX
1137                                                                *ctx,
1138                                                                unsigned char
1139                                                                *sig,
1140                                                                size_t *siglen,
1141                                                                const unsigned
1142                                                                char *tbs,
1143                                                                size_t tbslen))
1144 {
1145     if (pverify_recover_init)
1146         *pverify_recover_init = pmeth->verify_recover_init;
1147     if (pverify_recover)
1148         *pverify_recover = pmeth->verify_recover;
1149 }
1150
1151 void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
1152                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
1153                                                       EVP_MD_CTX *mctx),
1154                                int (**psignctx) (EVP_PKEY_CTX *ctx,
1155                                                  unsigned char *sig,
1156                                                  size_t *siglen,
1157                                                  EVP_MD_CTX *mctx))
1158 {
1159     if (psignctx_init)
1160         *psignctx_init = pmeth->signctx_init;
1161     if (psignctx)
1162         *psignctx = pmeth->signctx;
1163 }
1164
1165 void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
1166                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
1167                                                           EVP_MD_CTX *mctx),
1168                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
1169                                                      const unsigned char *sig,
1170                                                      int siglen,
1171                                                      EVP_MD_CTX *mctx))
1172 {
1173     if (pverifyctx_init)
1174         *pverifyctx_init = pmeth->verifyctx_init;
1175     if (pverifyctx)
1176         *pverifyctx = pmeth->verifyctx;
1177 }
1178
1179 void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
1180                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
1181                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
1182                                                    unsigned char *out,
1183                                                    size_t *outlen,
1184                                                    const unsigned char *in,
1185                                                    size_t inlen))
1186 {
1187     if (pencrypt_init)
1188         *pencrypt_init = pmeth->encrypt_init;
1189     if (pencryptfn)
1190         *pencryptfn = pmeth->encrypt;
1191 }
1192
1193 void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
1194                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
1195                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
1196                                                  unsigned char *out,
1197                                                  size_t *outlen,
1198                                                  const unsigned char *in,
1199                                                  size_t inlen))
1200 {
1201     if (pdecrypt_init)
1202         *pdecrypt_init = pmeth->decrypt_init;
1203     if (pdecrypt)
1204         *pdecrypt = pmeth->decrypt;
1205 }
1206
1207 void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
1208                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
1209                               int (**pderive) (EVP_PKEY_CTX *ctx,
1210                                                unsigned char *key,
1211                                                size_t *keylen))
1212 {
1213     if (pderive_init)
1214         *pderive_init = pmeth->derive_init;
1215     if (pderive)
1216         *pderive = pmeth->derive;
1217 }
1218
1219 void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
1220                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1221                                            void *p2),
1222                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
1223                                                const char *type,
1224                                                const char *value))
1225 {
1226     if (pctrl)
1227         *pctrl = pmeth->ctrl;
1228     if (pctrl_str)
1229         *pctrl_str = pmeth->ctrl_str;
1230 }
1231
1232 void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
1233                              int (**pcheck) (EVP_PKEY *pkey))
1234 {
1235     if (pcheck != NULL)
1236         *pcheck = pmeth->check;
1237 }
1238
1239 void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
1240                                     int (**pcheck) (EVP_PKEY *pkey))
1241 {
1242     if (pcheck != NULL)
1243         *pcheck = pmeth->public_check;
1244 }
1245
1246 void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
1247                                    int (**pcheck) (EVP_PKEY *pkey))
1248 {
1249     if (pcheck != NULL)
1250         *pcheck = pmeth->param_check;
1251 }
1252
1253 void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
1254                                      int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
1255                                                              EVP_MD_CTX *mctx))
1256 {
1257     if (pdigest_custom != NULL)
1258         *pdigest_custom = pmeth->digest_custom;
1259 }