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 <openssl/rsa.h>
  19 #include "internal/cryptlib.h"
  20 #include "crypto/asn1.h"
  21 #include "crypto/evp.h"
  22 #include "internal/numbers.h"
  23 #include "internal/provider.h"
  24 #include "evp_local.h"
  25
  26 typedef const EVP_PKEY_METHOD *(*pmeth_fn)(void);
  27 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  28
  29 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  30
  31 /* This array needs to be in order of NIDs */
  32 static pmeth_fn standard_methods[] = {
  33 #ifndef OPENSSL_NO_RSA
  34     rsa_pkey_method,
  35 #endif
  36 #ifndef OPENSSL_NO_DH
  37     dh_pkey_method,
  38 #endif
  39 #ifndef OPENSSL_NO_DSA
  40     dsa_pkey_method,
  41 #endif
  42 #ifndef OPENSSL_NO_EC
  43     ec_pkey_method,
  44 #endif
  45     hmac_pkey_method,
  46 #ifndef OPENSSL_NO_CMAC
  47     cmac_pkey_method,
  48 #endif
  49 #ifndef OPENSSL_NO_RSA
  50     rsa_pss_pkey_method,
  51 #endif
  52 #ifndef OPENSSL_NO_DH
  53     dhx_pkey_method,
  54 #endif
  55 #ifndef OPENSSL_NO_SCRYPT
  56     scrypt_pkey_method,
  57 #endif
  58     tls1_prf_pkey_method,
  59 #ifndef OPENSSL_NO_EC
  60     ecx25519_pkey_method,
  61     ecx448_pkey_method,
  62 #endif
  63     hkdf_pkey_method,
  64 #ifndef OPENSSL_NO_POLY1305
  65     poly1305_pkey_method,
  66 #endif
  67 #ifndef OPENSSL_NO_SIPHASH
  68     siphash_pkey_method,
  69 #endif
  70 #ifndef OPENSSL_NO_EC
  71     ed25519_pkey_method,
  72     ed448_pkey_method,
  73 #endif
  74 #ifndef OPENSSL_NO_SM2
  75     sm2_pkey_method,
  76 #endif
  77 };
  78
  79 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, pmeth_fn, pmeth_func);
  80
  81 static int pmeth_func_cmp(const EVP_PKEY_METHOD *const *a, pmeth_fn const *b)
  82 {
  83     return ((*a)->pkey_id - ((**b)())->pkey_id);
  84 }
  85
  86 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, pmeth_fn, pmeth_func);
  87
  88 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
  89                      const EVP_PKEY_METHOD *const *b)
  90 {
  91     return ((*a)->pkey_id - (*b)->pkey_id);
  92 }
  93
  94 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
  95 {
  96     pmeth_fn *ret;
  97     EVP_PKEY_METHOD tmp;
  98     const EVP_PKEY_METHOD *t = &tmp;
  99
 100     tmp.pkey_id = type;
 101     if (app_pkey_methods) {
 102         int idx;
 103         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
 104         if (idx >= 0)
 105             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 106     }
 107     ret = OBJ_bsearch_pmeth_func(&t, standard_methods,
 108                                  sizeof(standard_methods) /
 109                                  sizeof(pmeth_fn));
 110     if (ret == NULL || *ret == NULL)
 111         return NULL;
 112     return (**ret)();
 113 }
 114
 115 static EVP_PKEY_CTX *int_ctx_new(OPENSSL_CTX *libctx,
 116                                  EVP_PKEY *pkey, ENGINE *e,
 117                                  const char *name, const char *propquery,
 118                                  int id)
 119 {
 120     EVP_PKEY_CTX *ret;
 121     const EVP_PKEY_METHOD *pmeth = NULL;
 122
 123     /*
 124      * When using providers, the context is bound to the algo implementation
 125      * later.
 126      */
 127     if (pkey == NULL && e == NULL && id == -1)
 128         goto common;
 129
 130     /*
 131      * If the key doesn't contain anything legacy, then it must be provided,
 132      * so we extract the necessary information and use that.
 133      */
 134     if (pkey != NULL && pkey->pkey.ptr == NULL) {
 135         /* If we have an engine, something went wrong somewhere... */
 136         if (!ossl_assert(e == NULL))
 137             return NULL;
 138         name = evp_first_name(pkey->pkeys[0].keymgmt->prov,
 139                               pkey->pkeys[0].keymgmt->name_id);
 140         /*
 141          * TODO: I wonder if the EVP_PKEY should have the name and propquery
 142          * that were used when building it....  /RL
 143          */
 144         goto common;
 145     }
 146
 147     /* TODO(3.0) Legacy code should be removed when all is provider based */
 148     /* BEGIN legacy */
 149     if (id == -1) {
 150         if (pkey == NULL)
 151             return NULL;
 152         id = pkey->type;
 153     }
 154
 155     /*
 156      * Here, we extract what information we can for the purpose of
 157      * supporting usage with implementations from providers, to make
 158      * for a smooth transition from legacy stuff to provider based stuff.
 159      *
 160      * If an engine is given, this is entirely legacy, and we should not
 161      * pretend anything else, so we only set the name when no engine is
 162      * given.  If both are already given, someone made a mistake, and
 163      * since that can only happen internally, it's safe to make an
 164      * assertion.
 165      */
 166     if (!ossl_assert(e == NULL || name == NULL))
 167         return NULL;
 168     if (e == NULL)
 169         name = OBJ_nid2sn(id);
 170     propquery = NULL;
 171     /*
 172      * We were called using legacy data, or an EVP_PKEY, but an EVP_PKEY
 173      * isn't tied to a specific library context, so we fall back to the
 174      * default library context.
 175      * TODO(v3.0): an EVP_PKEY that doesn't originate from a leagacy key
 176      * structure only has the pkeys[] cache, where the first element is
 177      * considered the "origin".  Investigate if that could be a suitable
 178      * way to find a library context.
 179      */
 180     libctx = NULL;
 181
 182 #ifndef OPENSSL_NO_ENGINE
 183     if (e == NULL && pkey != NULL)
 184         e = pkey->pmeth_engine != NULL ? pkey->pmeth_engine : pkey->engine;
 185     /* Try to find an ENGINE which implements this method */
 186     if (e) {
 187         if (!ENGINE_init(e)) {
 188             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 189             return NULL;
 190         }
 191     } else {
 192         e = ENGINE_get_pkey_meth_engine(id);
 193     }
 194
 195     /*
 196      * If an ENGINE handled this method look it up. Otherwise use internal
 197      * tables.
 198      */
 199     if (e)
 200         pmeth = ENGINE_get_pkey_meth(e, id);
 201     else
 202 #endif
 203         pmeth = EVP_PKEY_meth_find(id);
 204
 205     if (pmeth == NULL) {
 206 #ifndef OPENSSL_NO_ENGINE
 207         ENGINE_finish(e);
 208 #endif
 209         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 210         return NULL;
 211     }
 212     /* END legacy */
 213
 214  common:
 215     ret = OPENSSL_zalloc(sizeof(*ret));
 216     if (ret == NULL) {
 217 #ifndef OPENSSL_NO_ENGINE
 218         ENGINE_finish(e);
 219 #endif
 220         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 221         return NULL;
 222     }
 223     ret->libctx = libctx;
 224     ret->algorithm = name;
 225     ret->propquery = propquery;
 226     ret->engine = e;
 227     ret->pmeth = pmeth;
 228     ret->operation = EVP_PKEY_OP_UNDEFINED;
 229     ret->pkey = pkey;
 230     if (pkey != NULL)
 231         EVP_PKEY_up_ref(pkey);
 232
 233     if (pmeth != NULL && pmeth->init != NULL) {
 234         if (pmeth->init(ret) <= 0) {
 235             ret->pmeth = NULL;
 236             EVP_PKEY_CTX_free(ret);
 237             return NULL;
 238         }
 239     }
 240
 241     return ret;
 242 }
 243
 244 void evp_pkey_ctx_free_old_ops(EVP_PKEY_CTX *ctx)
 245 {
 246     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 247         if (ctx->op.kex.exchprovctx != NULL && ctx->op.kex.exchange != NULL)
 248             ctx->op.kex.exchange->freectx(ctx->op.kex.exchprovctx);
 249         EVP_KEYEXCH_free(ctx->op.kex.exchange);
 250         ctx->op.kex.exchprovctx = NULL;
 251         ctx->op.kex.exchange = NULL;
 252     } else if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 253         if (ctx->op.sig.sigprovctx != NULL && ctx->op.sig.signature != NULL)
 254             ctx->op.sig.signature->freectx(ctx->op.sig.sigprovctx);
 255         EVP_SIGNATURE_free(ctx->op.sig.signature);
 256         ctx->op.sig.sigprovctx = NULL;
 257         ctx->op.sig.signature = NULL;
 258     } else if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) {
 259         if (ctx->op.ciph.ciphprovctx != NULL && ctx->op.ciph.cipher != NULL)
 260             ctx->op.ciph.cipher->freectx(ctx->op.ciph.ciphprovctx);
 261         EVP_ASYM_CIPHER_free(ctx->op.ciph.cipher);
 262         ctx->op.ciph.ciphprovctx = NULL;
 263         ctx->op.ciph.cipher = NULL;
 264     }
 265 }
 266
 267 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 268 {
 269     EVP_PKEY_METHOD *pmeth;
 270
 271     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 272     if (pmeth == NULL) {
 273         EVPerr(EVP_F_EVP_PKEY_METH_NEW, ERR_R_MALLOC_FAILURE);
 274         return NULL;
 275     }
 276
 277     pmeth->pkey_id = id;
 278     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 279     return pmeth;
 280 }
 281
 282 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 283                              const EVP_PKEY_METHOD *meth)
 284 {
 285     if (ppkey_id)
 286         *ppkey_id = meth->pkey_id;
 287     if (pflags)
 288         *pflags = meth->flags;
 289 }
 290
 291 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 292 {
 293
 294     dst->init = src->init;
 295     dst->copy = src->copy;
 296     dst->cleanup = src->cleanup;
 297
 298     dst->paramgen_init = src->paramgen_init;
 299     dst->paramgen = src->paramgen;
 300
 301     dst->keygen_init = src->keygen_init;
 302     dst->keygen = src->keygen;
 303
 304     dst->sign_init = src->sign_init;
 305     dst->sign = src->sign;
 306
 307     dst->verify_init = src->verify_init;
 308     dst->verify = src->verify;
 309
 310     dst->verify_recover_init = src->verify_recover_init;
 311     dst->verify_recover = src->verify_recover;
 312
 313     dst->signctx_init = src->signctx_init;
 314     dst->signctx = src->signctx;
 315
 316     dst->verifyctx_init = src->verifyctx_init;
 317     dst->verifyctx = src->verifyctx;
 318
 319     dst->encrypt_init = src->encrypt_init;
 320     dst->encrypt = src->encrypt;
 321
 322     dst->decrypt_init = src->decrypt_init;
 323     dst->decrypt = src->decrypt;
 324
 325     dst->derive_init = src->derive_init;
 326     dst->derive = src->derive;
 327
 328     dst->ctrl = src->ctrl;
 329     dst->ctrl_str = src->ctrl_str;
 330
 331     dst->check = src->check;
 332 }
 333
 334 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 335 {
 336     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 337         OPENSSL_free(pmeth);
 338 }
 339
 340 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 341 {
 342     return int_ctx_new(NULL, pkey, e, NULL, NULL, -1);
 343 }
 344
 345 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 346 {
 347     return int_ctx_new(NULL, NULL, e, NULL, NULL, id);
 348 }
 349
 350 EVP_PKEY_CTX *EVP_PKEY_CTX_new_provided(OPENSSL_CTX *libctx,
 351                                         const char *name,
 352                                         const char *propquery)
 353 {
 354     return int_ctx_new(libctx, NULL, NULL, name, propquery, -1);
 355 }
 356
 357 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(const EVP_PKEY_CTX *pctx)
 358 {
 359     EVP_PKEY_CTX *rctx;
 360
 361     if (((pctx->pmeth == NULL) || (pctx->pmeth->copy == NULL))
 362             && ((EVP_PKEY_CTX_IS_DERIVE_OP(pctx)
 363                  && pctx->op.kex.exchprovctx == NULL)
 364                 || (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)
 365                     && pctx->op.sig.sigprovctx == NULL)))
 366         return NULL;
 367 #ifndef OPENSSL_NO_ENGINE
 368     /* Make sure it's safe to copy a pkey context using an ENGINE */
 369     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 370         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 371         return 0;
 372     }
 373 #endif
 374     rctx = OPENSSL_zalloc(sizeof(*rctx));
 375     if (rctx == NULL) {
 376         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_MALLOC_FAILURE);
 377         return NULL;
 378     }
 379
 380     if (pctx->pkey != NULL)
 381         EVP_PKEY_up_ref(pctx->pkey);
 382     rctx->pkey = pctx->pkey;
 383     rctx->operation = pctx->operation;
 384     rctx->libctx = pctx->libctx;
 385     rctx->algorithm = pctx->algorithm;
 386     rctx->propquery = pctx->propquery;
 387
 388     if (EVP_PKEY_CTX_IS_DERIVE_OP(pctx)) {
 389         if (pctx->op.kex.exchange != NULL) {
 390             rctx->op.kex.exchange = pctx->op.kex.exchange;
 391             if (!EVP_KEYEXCH_up_ref(rctx->op.kex.exchange)) {
 392                 OPENSSL_free(rctx);
 393                 return NULL;
 394             }
 395         }
 396         if (pctx->op.kex.exchprovctx != NULL) {
 397             if (!ossl_assert(pctx->op.kex.exchange != NULL))
 398                 return NULL;
 399             rctx->op.kex.exchprovctx
 400                 = pctx->op.kex.exchange->dupctx(pctx->op.kex.exchprovctx);
 401             if (rctx->op.kex.exchprovctx == NULL) {
 402                 EVP_KEYEXCH_free(rctx->op.kex.exchange);
 403                 OPENSSL_free(rctx);
 404                 return NULL;
 405             }
 406             return rctx;
 407         }
 408     } else if (EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)) {
 409         if (pctx->op.sig.signature != NULL) {
 410             rctx->op.sig.signature = pctx->op.sig.signature;
 411             if (!EVP_SIGNATURE_up_ref(rctx->op.sig.signature)) {
 412                 OPENSSL_free(rctx);
 413                 return NULL;
 414             }
 415         }
 416         if (pctx->op.sig.sigprovctx != NULL) {
 417             if (!ossl_assert(pctx->op.sig.signature != NULL))
 418                 return NULL;
 419             rctx->op.sig.sigprovctx
 420                 = pctx->op.sig.signature->dupctx(pctx->op.sig.sigprovctx);
 421             if (rctx->op.sig.sigprovctx == NULL) {
 422                 EVP_SIGNATURE_free(rctx->op.sig.signature);
 423                 OPENSSL_free(rctx);
 424                 return NULL;
 425             }
 426             return rctx;
 427         }
 428     } else if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(pctx)) {
 429         if (pctx->op.ciph.cipher != NULL) {
 430             rctx->op.ciph.cipher = pctx->op.ciph.cipher;
 431             if (!EVP_ASYM_CIPHER_up_ref(rctx->op.ciph.cipher)) {
 432                 OPENSSL_free(rctx);
 433                 return NULL;
 434             }
 435         }
 436         if (pctx->op.ciph.ciphprovctx != NULL) {
 437             if (!ossl_assert(pctx->op.ciph.cipher != NULL))
 438                 return NULL;
 439             rctx->op.ciph.ciphprovctx
 440                 = pctx->op.ciph.cipher->dupctx(pctx->op.ciph.ciphprovctx);
 441             if (rctx->op.ciph.ciphprovctx == NULL) {
 442                 EVP_ASYM_CIPHER_free(rctx->op.ciph.cipher);
 443                 OPENSSL_free(rctx);
 444                 return NULL;
 445             }
 446             return rctx;
 447         }
 448     }
 449
 450     rctx->pmeth = pctx->pmeth;
 451 #ifndef OPENSSL_NO_ENGINE
 452     rctx->engine = pctx->engine;
 453 #endif
 454
 455     if (pctx->peerkey)
 456         EVP_PKEY_up_ref(pctx->peerkey);
 457     rctx->peerkey = pctx->peerkey;
 458
 459     if (pctx->pmeth->copy(rctx, pctx) > 0)
 460         return rctx;
 461
 462     rctx->pmeth = NULL;
 463     EVP_PKEY_CTX_free(rctx);
 464     return NULL;
 465
 466 }
 467
 468 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 469 {
 470     if (app_pkey_methods == NULL) {
 471         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 472         if (app_pkey_methods == NULL){
 473             EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 474             return 0;
 475         }
 476     }
 477     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth)) {
 478         EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 479         return 0;
 480     }
 481     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 482     return 1;
 483 }
 484
 485 void evp_app_cleanup_int(void)
 486 {
 487     if (app_pkey_methods != NULL)
 488         sk_EVP_PKEY_METHOD_pop_free(app_pkey_methods, EVP_PKEY_meth_free);
 489 }
 490
 491 int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth)
 492 {
 493     const EVP_PKEY_METHOD *ret;
 494
 495     ret = sk_EVP_PKEY_METHOD_delete_ptr(app_pkey_methods, pmeth);
 496
 497     return ret == NULL ? 0 : 1;
 498 }
 499
 500 size_t EVP_PKEY_meth_get_count(void)
 501 {
 502     size_t rv = OSSL_NELEM(standard_methods);
 503
 504     if (app_pkey_methods)
 505         rv += sk_EVP_PKEY_METHOD_num(app_pkey_methods);
 506     return rv;
 507 }
 508
 509 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx)
 510 {
 511     if (idx < OSSL_NELEM(standard_methods))
 512         return (standard_methods[idx])();
 513     if (app_pkey_methods == NULL)
 514         return NULL;
 515     idx -= OSSL_NELEM(standard_methods);
 516     if (idx >= (size_t)sk_EVP_PKEY_METHOD_num(app_pkey_methods))
 517         return NULL;
 518     return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 519 }
 520
 521 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 522 {
 523     if (ctx == NULL)
 524         return;
 525     if (ctx->pmeth && ctx->pmeth->cleanup)
 526         ctx->pmeth->cleanup(ctx);
 527
 528     evp_pkey_ctx_free_old_ops(ctx);
 529     EVP_KEYMGMT_free(ctx->keymgmt);
 530
 531     EVP_PKEY_free(ctx->pkey);
 532     EVP_PKEY_free(ctx->peerkey);
 533 #ifndef OPENSSL_NO_ENGINE
 534     ENGINE_finish(ctx->engine);
 535 #endif
 536     OPENSSL_free(ctx);
 537 }
 538
 539 int EVP_PKEY_CTX_get_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 540 {
 541     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 542             && ctx->op.sig.sigprovctx != NULL
 543             && ctx->op.sig.signature != NULL
 544             && ctx->op.sig.signature->get_ctx_params != NULL)
 545         return ctx->op.sig.signature->get_ctx_params(ctx->op.sig.sigprovctx,
 546                                                      params);
 547     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 548             && ctx->op.ciph.ciphprovctx != NULL
 549             && ctx->op.ciph.cipher != NULL
 550             && ctx->op.ciph.cipher->get_ctx_params != NULL)
 551         return ctx->op.ciph.cipher->get_ctx_params(ctx->op.ciph.ciphprovctx,
 552                                                    params);
 553     return 0;
 554 }
 555
 556 const OSSL_PARAM *EVP_PKEY_CTX_gettable_params(EVP_PKEY_CTX *ctx)
 557 {
 558     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 559             && ctx->op.sig.signature != NULL
 560             && ctx->op.sig.signature->gettable_ctx_params != NULL)
 561         return ctx->op.sig.signature->gettable_ctx_params();
 562
 563     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 564             && ctx->op.ciph.cipher != NULL
 565             && ctx->op.ciph.cipher->gettable_ctx_params != NULL)
 566         return ctx->op.ciph.cipher->gettable_ctx_params();
 567
 568     return NULL;
 569 }
 570
 571 int EVP_PKEY_CTX_set_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 572 {
 573     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 574             && ctx->op.kex.exchprovctx != NULL
 575             && ctx->op.kex.exchange != NULL
 576             && ctx->op.kex.exchange->set_ctx_params != NULL)
 577         return ctx->op.kex.exchange->set_ctx_params(ctx->op.kex.exchprovctx,
 578                                                     params);
 579     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 580             && ctx->op.sig.sigprovctx != NULL
 581             && ctx->op.sig.signature != NULL
 582             && ctx->op.sig.signature->set_ctx_params != NULL)
 583         return ctx->op.sig.signature->set_ctx_params(ctx->op.sig.sigprovctx,
 584                                                      params);
 585     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 586             && ctx->op.ciph.ciphprovctx != NULL
 587             && ctx->op.ciph.cipher != NULL
 588             && ctx->op.ciph.cipher->set_ctx_params != NULL)
 589         return ctx->op.ciph.cipher->set_ctx_params(ctx->op.ciph.ciphprovctx,
 590                                                      params);
 591     return 0;
 592 }
 593
 594 const OSSL_PARAM *EVP_PKEY_CTX_settable_params(EVP_PKEY_CTX *ctx)
 595 {
 596     if (EVP_PKEY_CTX_IS_DERIVE_OP(ctx)
 597             && ctx->op.kex.exchange != NULL
 598             && ctx->op.kex.exchange->settable_ctx_params != NULL)
 599         return ctx->op.kex.exchange->settable_ctx_params();
 600     if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 601             && ctx->op.sig.signature != NULL
 602             && ctx->op.sig.signature->settable_ctx_params != NULL)
 603         return ctx->op.sig.signature->settable_ctx_params();
 604     if (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 605             && ctx->op.ciph.cipher != NULL
 606             && ctx->op.ciph.cipher->settable_ctx_params != NULL)
 607         return ctx->op.ciph.cipher->settable_ctx_params();
 608
 609     return NULL;
 610 }
 611
 612 #ifndef OPENSSL_NO_DH
 613 int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad)
 614 {
 615     OSSL_PARAM dh_pad_params[2];
 616     unsigned int upad = pad;
 617
 618     /* We use EVP_PKEY_CTX_ctrl return values */
 619     if (ctx == NULL || !EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
 620         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 621         return -2;
 622     }
 623
 624     /* TODO(3.0): Remove this eventually when no more legacy */
 625     if (ctx->op.kex.exchprovctx == NULL)
 626         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_DERIVE,
 627                                  EVP_PKEY_CTRL_DH_PAD, pad, NULL);
 628
 629     dh_pad_params[0] = OSSL_PARAM_construct_uint(OSSL_EXCHANGE_PARAM_PAD, &upad);
 630     dh_pad_params[1] = OSSL_PARAM_construct_end();
 631
 632     return EVP_PKEY_CTX_set_params(ctx, dh_pad_params);
 633 }
 634 #endif
 635
 636 int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **md)
 637 {
 638     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 639     /* 80 should be big enough */
 640     char name[80] = "";
 641     const EVP_MD *tmp;
 642
 643     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 644         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 645         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 646         return -2;
 647     }
 648
 649     /* TODO(3.0): Remove this eventually when no more legacy */
 650     if (ctx->op.sig.sigprovctx == NULL)
 651         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 652                                  EVP_PKEY_CTRL_GET_MD, 0, (void *)(md));
 653
 654     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 655                                             name,
 656                                             sizeof(name));
 657     *p++ = OSSL_PARAM_construct_end();
 658
 659     if (!EVP_PKEY_CTX_get_params(ctx, sig_md_params))
 660         return 0;
 661
 662     tmp = evp_get_digestbyname_ex(ctx->libctx, name);
 663     if (tmp == NULL)
 664         return 0;
 665
 666     *md = tmp;
 667
 668     return 1;
 669 }
 670
 671 int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
 672 {
 673     OSSL_PARAM sig_md_params[3], *p = sig_md_params;
 674     size_t mdsize;
 675     const char *name;
 676
 677     if (ctx == NULL || !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)) {
 678         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 679         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 680         return -2;
 681     }
 682
 683     /* TODO(3.0): Remove this eventually when no more legacy */
 684     if (ctx->op.sig.sigprovctx == NULL)
 685         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 686                                  EVP_PKEY_CTRL_MD, 0, (void *)(md));
 687
 688     if (md == NULL) {
 689         name = "";
 690         mdsize = 0;
 691     } else {
 692         mdsize = EVP_MD_size(md);
 693         name = EVP_MD_name(md);
 694     }
 695
 696     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST,
 697                                             /*
 698                                              * Cast away the const. This is read
 699                                              * only so should be safe
 700                                              */
 701                                             (char *)name,
 702                                             strlen(name) + 1);
 703     *p++ = OSSL_PARAM_construct_size_t(OSSL_SIGNATURE_PARAM_DIGEST_SIZE,
 704                                        &mdsize);
 705     *p++ = OSSL_PARAM_construct_end();
 706
 707     return EVP_PKEY_CTX_set_params(ctx, sig_md_params);
 708 }
 709
 710 static int legacy_ctrl_to_param(EVP_PKEY_CTX *ctx, int keytype, int optype,
 711                                 int cmd, int p1, void *p2)
 712 {
 713     switch (cmd) {
 714 #ifndef OPENSSL_NO_DH
 715     case EVP_PKEY_CTRL_DH_PAD:
 716         return EVP_PKEY_CTX_set_dh_pad(ctx, p1);
 717 #endif
 718     case EVP_PKEY_CTRL_MD:
 719         return EVP_PKEY_CTX_set_signature_md(ctx, p2);
 720     case EVP_PKEY_CTRL_GET_MD:
 721         return EVP_PKEY_CTX_get_signature_md(ctx, p2);
 722     case EVP_PKEY_CTRL_RSA_PADDING:
 723         return EVP_PKEY_CTX_set_rsa_padding(ctx, p1);
 724     case EVP_PKEY_CTRL_GET_RSA_PADDING:
 725         return EVP_PKEY_CTX_get_rsa_padding(ctx, p2);
 726     case EVP_PKEY_CTRL_RSA_OAEP_MD:
 727         return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, p2);
 728     case EVP_PKEY_CTRL_GET_RSA_OAEP_MD:
 729         return EVP_PKEY_CTX_get_rsa_oaep_md(ctx, p2);
 730     case EVP_PKEY_CTRL_RSA_MGF1_MD:
 731         return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, p2);
 732     case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
 733         return EVP_PKEY_CTX_get_rsa_oaep_md(ctx, p2);
 734     case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
 735         return EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, p2, p1);
 736     case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL:
 737         return EVP_PKEY_CTX_get0_rsa_oaep_label(ctx, (unsigned char **)p2);
 738     case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
 739     case EVP_PKEY_CTRL_PKCS7_DECRYPT:
 740 #ifndef OPENSSL_NO_CMS
 741     case EVP_PKEY_CTRL_CMS_DECRYPT:
 742     case EVP_PKEY_CTRL_CMS_ENCRYPT:
 743 #endif
 744         if (ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
 745             return 1;
 746         ERR_raise(ERR_LIB_EVP,
 747                   EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 748         return -2;
 749     }
 750     return 0;
 751 }
 752
 753 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 754                       int cmd, int p1, void *p2)
 755 {
 756     int ret;
 757
 758     if (ctx == NULL) {
 759         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 760         return -2;
 761     }
 762
 763     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 764             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 765                 && ctx->op.sig.sigprovctx != NULL)
 766             || (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 767                 && ctx->op.ciph.ciphprovctx != NULL))
 768         return legacy_ctrl_to_param(ctx, keytype, optype, cmd, p1, p2);
 769
 770     if (ctx->pmeth == NULL || ctx->pmeth->ctrl == NULL) {
 771         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 772         return -2;
 773     }
 774     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 775         return -1;
 776
 777     /* Skip the operation checks since this is called in a very early stage */
 778     if (ctx->pmeth->digest_custom != NULL)
 779         goto doit;
 780
 781     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 782         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 783         return -1;
 784     }
 785
 786     if ((optype != -1) && !(ctx->operation & optype)) {
 787         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 788         return -1;
 789     }
 790
 791  doit:
 792     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 793
 794     if (ret == -2)
 795         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 796
 797     return ret;
 798 }
 799
 800 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 801                              int cmd, uint64_t value)
 802 {
 803     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 804 }
 805
 806 static int legacy_ctrl_str_to_param(EVP_PKEY_CTX *ctx, const char *name,
 807                                     const char *value)
 808 {
 809 #ifndef OPENSSL_NO_DH
 810     if (strcmp(name, "dh_pad") == 0) {
 811         int pad;
 812
 813         pad = atoi(value);
 814         return EVP_PKEY_CTX_set_dh_pad(ctx, pad);
 815     }
 816 #endif
 817     if (strcmp(name, "digest") == 0) {
 818         int ret;
 819         EVP_MD *md;
 820
 821         if (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) || ctx->op.sig.signature == NULL)
 822             return 0;
 823         md = EVP_MD_fetch(ossl_provider_library_context(ctx->op.sig.signature->prov),
 824                           value, NULL);
 825         if (md == NULL)
 826             return 0;
 827         ret = EVP_PKEY_CTX_set_signature_md(ctx, md);
 828         EVP_MD_meth_free(md);
 829         return ret;
 830     }
 831
 832     if (strcmp(name, "rsa_padding_mode") == 0) {
 833         int pm;
 834
 835         if (strcmp(value, "pkcs1") == 0) {
 836             pm = RSA_PKCS1_PADDING;
 837         } else if (strcmp(value, "sslv23") == 0) {
 838             pm = RSA_SSLV23_PADDING;
 839         } else if (strcmp(value, "none") == 0) {
 840             pm = RSA_NO_PADDING;
 841         } else if (strcmp(value, "oeap") == 0) {
 842             pm = RSA_PKCS1_OAEP_PADDING;
 843         } else if (strcmp(value, "oaep") == 0) {
 844             pm = RSA_PKCS1_OAEP_PADDING;
 845         } else if (strcmp(value, "x931") == 0) {
 846             pm = RSA_X931_PADDING;
 847         } else if (strcmp(value, "pss") == 0) {
 848             pm = RSA_PKCS1_PSS_PADDING;
 849         } else {
 850             ERR_raise(ERR_LIB_RSA, RSA_R_UNKNOWN_PADDING_TYPE);
 851             return -2;
 852         }
 853         return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
 854     }
 855
 856     if (strcmp(name, "rsa_mgf1_md") == 0)
 857         return EVP_PKEY_CTX_set_rsa_mgf1_md_name(ctx, value, NULL);
 858
 859     if (strcmp(name, "rsa_oaep_md") == 0)
 860         return EVP_PKEY_CTX_set_rsa_oaep_md_name(ctx, value, NULL);
 861
 862     if (strcmp(name, "rsa_oaep_label") == 0) {
 863         unsigned char *lab;
 864         long lablen;
 865         int ret;
 866
 867         lab = OPENSSL_hexstr2buf(value, &lablen);
 868         if (lab == NULL)
 869             return 0;
 870         ret = EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, lab, lablen);
 871         if (ret <= 0)
 872             OPENSSL_free(lab);
 873         return ret;
 874     }
 875
 876
 877
 878     return 0;
 879 }
 880
 881 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 882                           const char *name, const char *value)
 883 {
 884     if (ctx == NULL) {
 885         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 886         return -2;
 887     }
 888
 889     if ((EVP_PKEY_CTX_IS_DERIVE_OP(ctx) && ctx->op.kex.exchprovctx != NULL)
 890             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 891                 && ctx->op.sig.sigprovctx != NULL)
 892             || (EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 893                 && ctx->op.ciph.ciphprovctx != NULL))
 894         return legacy_ctrl_str_to_param(ctx, name, value);
 895
 896     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 897         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 898         return -2;
 899     }
 900     if (strcmp(name, "digest") == 0)
 901         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
 902                                value);
 903     return ctx->pmeth->ctrl_str(ctx, name, value);
 904 }
 905
 906 /* Utility functions to send a string of hex string to a ctrl */
 907
 908 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 909 {
 910     size_t len;
 911
 912     len = strlen(str);
 913     if (len > INT_MAX)
 914         return -1;
 915     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 916 }
 917
 918 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 919 {
 920     unsigned char *bin;
 921     long binlen;
 922     int rv = -1;
 923
 924     bin = OPENSSL_hexstr2buf(hex, &binlen);
 925     if (bin == NULL)
 926         return 0;
 927     if (binlen <= INT_MAX)
 928         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 929     OPENSSL_free(bin);
 930     return rv;
 931 }
 932
 933 /* Pass a message digest to a ctrl */
 934 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
 935 {
 936     const EVP_MD *m;
 937
 938     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
 939         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
 940         return 0;
 941     }
 942     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
 943 }
 944
 945 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 946 {
 947     return ctx->operation;
 948 }
 949
 950 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 951 {
 952     ctx->keygen_info = dat;
 953     ctx->keygen_info_count = datlen;
 954 }
 955
 956 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 957 {
 958     ctx->data = data;
 959 }
 960
 961 void *EVP_PKEY_CTX_get_data(const EVP_PKEY_CTX *ctx)
 962 {
 963     return ctx->data;
 964 }
 965
 966 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 967 {
 968     return ctx->pkey;
 969 }
 970
 971 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 972 {
 973     return ctx->peerkey;
 974 }
 975
 976 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 977 {
 978     ctx->app_data = data;
 979 }
 980
 981 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 982 {
 983     return ctx->app_data;
 984 }
 985
 986 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 987                             int (*init) (EVP_PKEY_CTX *ctx))
 988 {
 989     pmeth->init = init;
 990 }
 991
 992 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 993                             int (*copy) (EVP_PKEY_CTX *dst,
 994                                          const EVP_PKEY_CTX *src))
 995 {
 996     pmeth->copy = copy;
 997 }
 998
 999 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
1000                                void (*cleanup) (EVP_PKEY_CTX *ctx))
1001 {
1002     pmeth->cleanup = cleanup;
1003 }
1004
1005 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
1006                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
1007                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
1008                                                  EVP_PKEY *pkey))
1009 {
1010     pmeth->paramgen_init = paramgen_init;
1011     pmeth->paramgen = paramgen;
1012 }
1013
1014 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
1015                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
1016                               int (*keygen) (EVP_PKEY_CTX *ctx,
1017                                              EVP_PKEY *pkey))
1018 {
1019     pmeth->keygen_init = keygen_init;
1020     pmeth->keygen = keygen;
1021 }
1022
1023 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
1024                             int (*sign_init) (EVP_PKEY_CTX *ctx),
1025                             int (*sign) (EVP_PKEY_CTX *ctx,
1026                                          unsigned char *sig, size_t *siglen,
1027                                          const unsigned char *tbs,
1028                                          size_t tbslen))
1029 {
1030     pmeth->sign_init = sign_init;
1031     pmeth->sign = sign;
1032 }
1033
1034 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
1035                               int (*verify_init) (EVP_PKEY_CTX *ctx),
1036                               int (*verify) (EVP_PKEY_CTX *ctx,
1037                                              const unsigned char *sig,
1038                                              size_t siglen,
1039                                              const unsigned char *tbs,
1040                                              size_t tbslen))
1041 {
1042     pmeth->verify_init = verify_init;
1043     pmeth->verify = verify;
1044 }
1045
1046 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
1047                                       int (*verify_recover_init) (EVP_PKEY_CTX
1048                                                                   *ctx),
1049                                       int (*verify_recover) (EVP_PKEY_CTX
1050                                                              *ctx,
1051                                                              unsigned char
1052                                                              *sig,
1053                                                              size_t *siglen,
1054                                                              const unsigned
1055                                                              char *tbs,
1056                                                              size_t tbslen))
1057 {
1058     pmeth->verify_recover_init = verify_recover_init;
1059     pmeth->verify_recover = verify_recover;
1060 }
1061
1062 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
1063                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
1064                                                     EVP_MD_CTX *mctx),
1065                                int (*signctx) (EVP_PKEY_CTX *ctx,
1066                                                unsigned char *sig,
1067                                                size_t *siglen,
1068                                                EVP_MD_CTX *mctx))
1069 {
1070     pmeth->signctx_init = signctx_init;
1071     pmeth->signctx = signctx;
1072 }
1073
1074 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
1075                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
1076                                                         EVP_MD_CTX *mctx),
1077                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
1078                                                    const unsigned char *sig,
1079                                                    int siglen,
1080                                                    EVP_MD_CTX *mctx))
1081 {
1082     pmeth->verifyctx_init = verifyctx_init;
1083     pmeth->verifyctx = verifyctx;
1084 }
1085
1086 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
1087                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
1088                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
1089                                                  unsigned char *out,
1090                                                  size_t *outlen,
1091                                                  const unsigned char *in,
1092                                                  size_t inlen))
1093 {
1094     pmeth->encrypt_init = encrypt_init;
1095     pmeth->encrypt = encryptfn;
1096 }
1097
1098 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
1099                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
1100                                int (*decrypt) (EVP_PKEY_CTX *ctx,
1101                                                unsigned char *out,
1102                                                size_t *outlen,
1103                                                const unsigned char *in,
1104                                                size_t inlen))
1105 {
1106     pmeth->decrypt_init = decrypt_init;
1107     pmeth->decrypt = decrypt;
1108 }
1109
1110 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
1111                               int (*derive_init) (EVP_PKEY_CTX *ctx),
1112                               int (*derive) (EVP_PKEY_CTX *ctx,
1113                                              unsigned char *key,
1114                                              size_t *keylen))
1115 {
1116     pmeth->derive_init = derive_init;
1117     pmeth->derive = derive;
1118 }
1119
1120 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
1121                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1122                                          void *p2),
1123                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
1124                                              const char *type,
1125                                              const char *value))
1126 {
1127     pmeth->ctrl = ctrl;
1128     pmeth->ctrl_str = ctrl_str;
1129 }
1130
1131 void EVP_PKEY_meth_set_digestsign(EVP_PKEY_METHOD *pmeth,
1132     int (*digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
1133                        const unsigned char *tbs, size_t tbslen))
1134 {
1135     pmeth->digestsign = digestsign;
1136 }
1137
1138 void EVP_PKEY_meth_set_digestverify(EVP_PKEY_METHOD *pmeth,
1139     int (*digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
1140                          size_t siglen, const unsigned char *tbs,
1141                          size_t tbslen))
1142 {
1143     pmeth->digestverify = digestverify;
1144 }
1145
1146 void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
1147                              int (*check) (EVP_PKEY *pkey))
1148 {
1149     pmeth->check = check;
1150 }
1151
1152 void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
1153                                     int (*check) (EVP_PKEY *pkey))
1154 {
1155     pmeth->public_check = check;
1156 }
1157
1158 void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
1159                                    int (*check) (EVP_PKEY *pkey))
1160 {
1161     pmeth->param_check = check;
1162 }
1163
1164 void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
1165                                      int (*digest_custom) (EVP_PKEY_CTX *ctx,
1166                                                            EVP_MD_CTX *mctx))
1167 {
1168     pmeth->digest_custom = digest_custom;
1169 }
1170
1171 void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
1172                             int (**pinit) (EVP_PKEY_CTX *ctx))
1173 {
1174     *pinit = pmeth->init;
1175 }
1176
1177 void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
1178                             int (**pcopy) (EVP_PKEY_CTX *dst,
1179                                            const EVP_PKEY_CTX *src))
1180 {
1181     *pcopy = pmeth->copy;
1182 }
1183
1184 void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
1185                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
1186 {
1187     *pcleanup = pmeth->cleanup;
1188 }
1189
1190 void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
1191                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
1192                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
1193                                                    EVP_PKEY *pkey))
1194 {
1195     if (pparamgen_init)
1196         *pparamgen_init = pmeth->paramgen_init;
1197     if (pparamgen)
1198         *pparamgen = pmeth->paramgen;
1199 }
1200
1201 void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
1202                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
1203                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
1204                                                EVP_PKEY *pkey))
1205 {
1206     if (pkeygen_init)
1207         *pkeygen_init = pmeth->keygen_init;
1208     if (pkeygen)
1209         *pkeygen = pmeth->keygen;
1210 }
1211
1212 void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
1213                             int (**psign_init) (EVP_PKEY_CTX *ctx),
1214                             int (**psign) (EVP_PKEY_CTX *ctx,
1215                                            unsigned char *sig, size_t *siglen,
1216                                            const unsigned char *tbs,
1217                                            size_t tbslen))
1218 {
1219     if (psign_init)
1220         *psign_init = pmeth->sign_init;
1221     if (psign)
1222         *psign = pmeth->sign;
1223 }
1224
1225 void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
1226                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
1227                               int (**pverify) (EVP_PKEY_CTX *ctx,
1228                                                const unsigned char *sig,
1229                                                size_t siglen,
1230                                                const unsigned char *tbs,
1231                                                size_t tbslen))
1232 {
1233     if (pverify_init)
1234         *pverify_init = pmeth->verify_init;
1235     if (pverify)
1236         *pverify = pmeth->verify;
1237 }
1238
1239 void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
1240                                       int (**pverify_recover_init) (EVP_PKEY_CTX
1241                                                                     *ctx),
1242                                       int (**pverify_recover) (EVP_PKEY_CTX
1243                                                                *ctx,
1244                                                                unsigned char
1245                                                                *sig,
1246                                                                size_t *siglen,
1247                                                                const unsigned
1248                                                                char *tbs,
1249                                                                size_t tbslen))
1250 {
1251     if (pverify_recover_init)
1252         *pverify_recover_init = pmeth->verify_recover_init;
1253     if (pverify_recover)
1254         *pverify_recover = pmeth->verify_recover;
1255 }
1256
1257 void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
1258                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
1259                                                       EVP_MD_CTX *mctx),
1260                                int (**psignctx) (EVP_PKEY_CTX *ctx,
1261                                                  unsigned char *sig,
1262                                                  size_t *siglen,
1263                                                  EVP_MD_CTX *mctx))
1264 {
1265     if (psignctx_init)
1266         *psignctx_init = pmeth->signctx_init;
1267     if (psignctx)
1268         *psignctx = pmeth->signctx;
1269 }
1270
1271 void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
1272                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
1273                                                           EVP_MD_CTX *mctx),
1274                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
1275                                                      const unsigned char *sig,
1276                                                      int siglen,
1277                                                      EVP_MD_CTX *mctx))
1278 {
1279     if (pverifyctx_init)
1280         *pverifyctx_init = pmeth->verifyctx_init;
1281     if (pverifyctx)
1282         *pverifyctx = pmeth->verifyctx;
1283 }
1284
1285 void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
1286                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
1287                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
1288                                                    unsigned char *out,
1289                                                    size_t *outlen,
1290                                                    const unsigned char *in,
1291                                                    size_t inlen))
1292 {
1293     if (pencrypt_init)
1294         *pencrypt_init = pmeth->encrypt_init;
1295     if (pencryptfn)
1296         *pencryptfn = pmeth->encrypt;
1297 }
1298
1299 void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
1300                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
1301                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
1302                                                  unsigned char *out,
1303                                                  size_t *outlen,
1304                                                  const unsigned char *in,
1305                                                  size_t inlen))
1306 {
1307     if (pdecrypt_init)
1308         *pdecrypt_init = pmeth->decrypt_init;
1309     if (pdecrypt)
1310         *pdecrypt = pmeth->decrypt;
1311 }
1312
1313 void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
1314                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
1315                               int (**pderive) (EVP_PKEY_CTX *ctx,
1316                                                unsigned char *key,
1317                                                size_t *keylen))
1318 {
1319     if (pderive_init)
1320         *pderive_init = pmeth->derive_init;
1321     if (pderive)
1322         *pderive = pmeth->derive;
1323 }
1324
1325 void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
1326                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
1327                                            void *p2),
1328                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
1329                                                const char *type,
1330                                                const char *value))
1331 {
1332     if (pctrl)
1333         *pctrl = pmeth->ctrl;
1334     if (pctrl_str)
1335         *pctrl_str = pmeth->ctrl_str;
1336 }
1337
1338 void EVP_PKEY_meth_get_digestsign(EVP_PKEY_METHOD *pmeth,
1339     int (**digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
1340                         const unsigned char *tbs, size_t tbslen))
1341 {
1342     if (digestsign)
1343         *digestsign = pmeth->digestsign;
1344 }
1345
1346 void EVP_PKEY_meth_get_digestverify(EVP_PKEY_METHOD *pmeth,
1347     int (**digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
1348                           size_t siglen, const unsigned char *tbs,
1349                           size_t tbslen))
1350 {
1351     if (digestverify)
1352         *digestverify = pmeth->digestverify;
1353 }
1354
1355 void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
1356                              int (**pcheck) (EVP_PKEY *pkey))
1357 {
1358     if (pcheck != NULL)
1359         *pcheck = pmeth->check;
1360 }
1361
1362 void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
1363                                     int (**pcheck) (EVP_PKEY *pkey))
1364 {
1365     if (pcheck != NULL)
1366         *pcheck = pmeth->public_check;
1367 }
1368
1369 void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
1370                                    int (**pcheck) (EVP_PKEY *pkey))
1371 {
1372     if (pcheck != NULL)
1373         *pcheck = pmeth->param_check;
1374 }
1375
1376 void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
1377                                      int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
1378                                                              EVP_MD_CTX *mctx))
1379 {
1380     if (pdigest_custom != NULL)
1381         *pdigest_custom = pmeth->digest_custom;
1382 }