crypto/evp/pmeth_lib.c

   1 /* pmeth_lib.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 2006.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include <stdio.h>
  61 #include <stdlib.h>
  62 #include "internal/cryptlib.h"
  63 #ifndef OPENSSL_NO_ENGINE
  64 # include <openssl/engine.h>
  65 #endif
  66 #include "internal/asn1_int.h"
  67 #include "internal/evp_int.h"
  68
  69 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  70
  71 DECLARE_STACK_OF(EVP_PKEY_METHOD)
  72 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  73
  74 static const EVP_PKEY_METHOD *standard_methods[] = {
  75 #ifndef OPENSSL_NO_RSA
  76     &rsa_pkey_meth,
  77 #endif
  78 #ifndef OPENSSL_NO_DH
  79     &dh_pkey_meth,
  80 #endif
  81 #ifndef OPENSSL_NO_DSA
  82     &dsa_pkey_meth,
  83 #endif
  84 #ifndef OPENSSL_NO_EC
  85     &ec_pkey_meth,
  86 #endif
  87     &hmac_pkey_meth,
  88     &cmac_pkey_meth,
  89 #ifndef OPENSSL_NO_DH
  90     &dhx_pkey_meth
  91 #endif
  92 };
  93
  94 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  95                            pmeth);
  96
  97 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
  98                      const EVP_PKEY_METHOD *const *b)
  99 {
 100     return ((*a)->pkey_id - (*b)->pkey_id);
 101 }
 102
 103 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
 104                              pmeth);
 105
 106 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
 107 {
 108     EVP_PKEY_METHOD tmp;
 109     const EVP_PKEY_METHOD *t = &tmp, **ret;
 110     tmp.pkey_id = type;
 111     if (app_pkey_methods) {
 112         int idx;
 113         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
 114         if (idx >= 0)
 115             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 116     }
 117     ret = OBJ_bsearch_pmeth(&t, standard_methods,
 118                             sizeof(standard_methods) /
 119                             sizeof(EVP_PKEY_METHOD *));
 120     if (!ret || !*ret)
 121         return NULL;
 122     return *ret;
 123 }
 124
 125 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
 126 {
 127     EVP_PKEY_CTX *ret;
 128     const EVP_PKEY_METHOD *pmeth;
 129     if (id == -1) {
 130         if (!pkey || !pkey->ameth)
 131             return NULL;
 132         id = pkey->ameth->pkey_id;
 133     }
 134 #ifndef OPENSSL_NO_ENGINE
 135     if (pkey && pkey->engine)
 136         e = pkey->engine;
 137     /* Try to find an ENGINE which implements this method */
 138     if (e) {
 139         if (!ENGINE_init(e)) {
 140             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 141             return NULL;
 142         }
 143     } else
 144         e = ENGINE_get_pkey_meth_engine(id);
 145
 146     /*
 147      * If an ENGINE handled this method look it up. Othewise use internal
 148      * tables.
 149      */
 150
 151     if (e)
 152         pmeth = ENGINE_get_pkey_meth(e, id);
 153     else
 154 #endif
 155         pmeth = EVP_PKEY_meth_find(id);
 156
 157     if (pmeth == NULL) {
 158         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 159         return NULL;
 160     }
 161
 162     ret = OPENSSL_zalloc(sizeof(*ret));
 163     if (!ret) {
 164 #ifndef OPENSSL_NO_ENGINE
 165         if (e)
 166             ENGINE_finish(e);
 167 #endif
 168         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 169         return NULL;
 170     }
 171     ret->engine = e;
 172     ret->pmeth = pmeth;
 173     ret->operation = EVP_PKEY_OP_UNDEFINED;
 174     ret->pkey = pkey;
 175     if (pkey)
 176         CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 177
 178     if (pmeth->init) {
 179         if (pmeth->init(ret) <= 0) {
 180             EVP_PKEY_CTX_free(ret);
 181             return NULL;
 182         }
 183     }
 184
 185     return ret;
 186 }
 187
 188 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 189 {
 190     EVP_PKEY_METHOD *pmeth;
 191
 192     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 193     if (!pmeth)
 194         return NULL;
 195
 196     pmeth->pkey_id = id;
 197     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 198     return pmeth;
 199 }
 200
 201 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 202                              const EVP_PKEY_METHOD *meth)
 203 {
 204     if (ppkey_id)
 205         *ppkey_id = meth->pkey_id;
 206     if (pflags)
 207         *pflags = meth->flags;
 208 }
 209
 210 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 211 {
 212
 213     dst->init = src->init;
 214     dst->copy = src->copy;
 215     dst->cleanup = src->cleanup;
 216
 217     dst->paramgen_init = src->paramgen_init;
 218     dst->paramgen = src->paramgen;
 219
 220     dst->keygen_init = src->keygen_init;
 221     dst->keygen = src->keygen;
 222
 223     dst->sign_init = src->sign_init;
 224     dst->sign = src->sign;
 225
 226     dst->verify_init = src->verify_init;
 227     dst->verify = src->verify;
 228
 229     dst->verify_recover_init = src->verify_recover_init;
 230     dst->verify_recover = src->verify_recover;
 231
 232     dst->signctx_init = src->signctx_init;
 233     dst->signctx = src->signctx;
 234
 235     dst->verifyctx_init = src->verifyctx_init;
 236     dst->verifyctx = src->verifyctx;
 237
 238     dst->encrypt_init = src->encrypt_init;
 239     dst->encrypt = src->encrypt;
 240
 241     dst->decrypt_init = src->decrypt_init;
 242     dst->decrypt = src->decrypt;
 243
 244     dst->derive_init = src->derive_init;
 245     dst->derive = src->derive;
 246
 247     dst->ctrl = src->ctrl;
 248     dst->ctrl_str = src->ctrl_str;
 249 }
 250
 251 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 252 {
 253     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 254         OPENSSL_free(pmeth);
 255 }
 256
 257 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 258 {
 259     return int_ctx_new(pkey, e, -1);
 260 }
 261
 262 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 263 {
 264     return int_ctx_new(NULL, e, id);
 265 }
 266
 267 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 268 {
 269     EVP_PKEY_CTX *rctx;
 270     if (!pctx->pmeth || !pctx->pmeth->copy)
 271         return NULL;
 272 #ifndef OPENSSL_NO_ENGINE
 273     /* Make sure it's safe to copy a pkey context using an ENGINE */
 274     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 275         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 276         return 0;
 277     }
 278 #endif
 279     rctx = OPENSSL_malloc(sizeof(*rctx));
 280     if (!rctx)
 281         return NULL;
 282
 283     rctx->pmeth = pctx->pmeth;
 284 #ifndef OPENSSL_NO_ENGINE
 285     rctx->engine = pctx->engine;
 286 #endif
 287
 288     if (pctx->pkey)
 289         CRYPTO_add(&pctx->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 290
 291     rctx->pkey = pctx->pkey;
 292
 293     if (pctx->peerkey)
 294         CRYPTO_add(&pctx->peerkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 295
 296     rctx->peerkey = pctx->peerkey;
 297
 298     rctx->data = NULL;
 299     rctx->app_data = NULL;
 300     rctx->operation = pctx->operation;
 301
 302     if (pctx->pmeth->copy(rctx, pctx) > 0)
 303         return rctx;
 304
 305     EVP_PKEY_CTX_free(rctx);
 306     return NULL;
 307
 308 }
 309
 310 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 311 {
 312     if (app_pkey_methods == NULL) {
 313         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 314         if (!app_pkey_methods)
 315             return 0;
 316     }
 317     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
 318         return 0;
 319     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 320     return 1;
 321 }
 322
 323 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 324 {
 325     if (ctx == NULL)
 326         return;
 327     if (ctx->pmeth && ctx->pmeth->cleanup)
 328         ctx->pmeth->cleanup(ctx);
 329     EVP_PKEY_free(ctx->pkey);
 330     EVP_PKEY_free(ctx->peerkey);
 331 #ifndef OPENSSL_NO_ENGINE
 332     if (ctx->engine)
 333         /*
 334          * The EVP_PKEY_CTX we used belongs to an ENGINE, release the
 335          * functional reference we held for this reason.
 336          */
 337         ENGINE_finish(ctx->engine);
 338 #endif
 339     OPENSSL_free(ctx);
 340 }
 341
 342 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 343                       int cmd, int p1, void *p2)
 344 {
 345     int ret;
 346     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 347         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 348         return -2;
 349     }
 350     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 351         return -1;
 352
 353     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 354         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 355         return -1;
 356     }
 357
 358     if ((optype != -1) && !(ctx->operation & optype)) {
 359         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 360         return -1;
 361     }
 362
 363     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 364
 365     if (ret == -2)
 366         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 367
 368     return ret;
 369
 370 }
 371
 372 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 373                           const char *name, const char *value)
 374 {
 375     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 376         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 377         return -2;
 378     }
 379     if (strcmp(name, "digest") == 0) {
 380         const EVP_MD *md;
 381         if (value == NULL || (md = EVP_get_digestbyname(value)) == NULL) {
 382             EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
 383             return 0;
 384         }
 385         return EVP_PKEY_CTX_set_signature_md(ctx, md);
 386     }
 387     return ctx->pmeth->ctrl_str(ctx, name, value);
 388 }
 389
 390 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 391 {
 392     return ctx->operation;
 393 }
 394
 395 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 396 {
 397     ctx->keygen_info = dat;
 398     ctx->keygen_info_count = datlen;
 399 }
 400
 401 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 402 {
 403     ctx->data = data;
 404 }
 405
 406 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 407 {
 408     return ctx->data;
 409 }
 410
 411 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 412 {
 413     return ctx->pkey;
 414 }
 415
 416 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 417 {
 418     return ctx->peerkey;
 419 }
 420
 421 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 422 {
 423     ctx->app_data = data;
 424 }
 425
 426 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 427 {
 428     return ctx->app_data;
 429 }
 430
 431 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 432                             int (*init) (EVP_PKEY_CTX *ctx))
 433 {
 434     pmeth->init = init;
 435 }
 436
 437 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 438                             int (*copy) (EVP_PKEY_CTX *dst,
 439                                          EVP_PKEY_CTX *src))
 440 {
 441     pmeth->copy = copy;
 442 }
 443
 444 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 445                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 446 {
 447     pmeth->cleanup = cleanup;
 448 }
 449
 450 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 451                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 452                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 453                                                  EVP_PKEY *pkey))
 454 {
 455     pmeth->paramgen_init = paramgen_init;
 456     pmeth->paramgen = paramgen;
 457 }
 458
 459 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 460                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 461                               int (*keygen) (EVP_PKEY_CTX *ctx,
 462                                              EVP_PKEY *pkey))
 463 {
 464     pmeth->keygen_init = keygen_init;
 465     pmeth->keygen = keygen;
 466 }
 467
 468 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 469                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 470                             int (*sign) (EVP_PKEY_CTX *ctx,
 471                                          unsigned char *sig, size_t *siglen,
 472                                          const unsigned char *tbs,
 473                                          size_t tbslen))
 474 {
 475     pmeth->sign_init = sign_init;
 476     pmeth->sign = sign;
 477 }
 478
 479 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 480                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 481                               int (*verify) (EVP_PKEY_CTX *ctx,
 482                                              const unsigned char *sig,
 483                                              size_t siglen,
 484                                              const unsigned char *tbs,
 485                                              size_t tbslen))
 486 {
 487     pmeth->verify_init = verify_init;
 488     pmeth->verify = verify;
 489 }
 490
 491 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 492                                       int (*verify_recover_init) (EVP_PKEY_CTX
 493                                                                   *ctx),
 494                                       int (*verify_recover) (EVP_PKEY_CTX
 495                                                              *ctx,
 496                                                              unsigned char
 497                                                              *sig,
 498                                                              size_t *siglen,
 499                                                              const unsigned
 500                                                              char *tbs,
 501                                                              size_t tbslen))
 502 {
 503     pmeth->verify_recover_init = verify_recover_init;
 504     pmeth->verify_recover = verify_recover;
 505 }
 506
 507 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 508                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 509                                                     EVP_MD_CTX *mctx),
 510                                int (*signctx) (EVP_PKEY_CTX *ctx,
 511                                                unsigned char *sig,
 512                                                size_t *siglen,
 513                                                EVP_MD_CTX *mctx))
 514 {
 515     pmeth->signctx_init = signctx_init;
 516     pmeth->signctx = signctx;
 517 }
 518
 519 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 520                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 521                                                         EVP_MD_CTX *mctx),
 522                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 523                                                    const unsigned char *sig,
 524                                                    int siglen,
 525                                                    EVP_MD_CTX *mctx))
 526 {
 527     pmeth->verifyctx_init = verifyctx_init;
 528     pmeth->verifyctx = verifyctx;
 529 }
 530
 531 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 532                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 533                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 534                                                  unsigned char *out,
 535                                                  size_t *outlen,
 536                                                  const unsigned char *in,
 537                                                  size_t inlen))
 538 {
 539     pmeth->encrypt_init = encrypt_init;
 540     pmeth->encrypt = encryptfn;
 541 }
 542
 543 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 544                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 545                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 546                                                unsigned char *out,
 547                                                size_t *outlen,
 548                                                const unsigned char *in,
 549                                                size_t inlen))
 550 {
 551     pmeth->decrypt_init = decrypt_init;
 552     pmeth->decrypt = decrypt;
 553 }
 554
 555 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 556                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 557                               int (*derive) (EVP_PKEY_CTX *ctx,
 558                                              unsigned char *key,
 559                                              size_t *keylen))
 560 {
 561     pmeth->derive_init = derive_init;
 562     pmeth->derive = derive;
 563 }
 564
 565 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 566                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 567                                          void *p2),
 568                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 569                                              const char *type,
 570                                              const char *value))
 571 {
 572     pmeth->ctrl = ctrl;
 573     pmeth->ctrl_str = ctrl_str;
 574 }
 575
 576 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
 577                             int (**pinit) (EVP_PKEY_CTX *ctx))
 578 {
 579     *pinit = pmeth->init;
 580 }
 581
 582 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
 583                             int (**pcopy) (EVP_PKEY_CTX *dst,
 584                                            EVP_PKEY_CTX *src))
 585 {
 586     *pcopy = pmeth->copy;
 587 }
 588
 589 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
 590                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 591 {
 592     *pcleanup = pmeth->cleanup;
 593 }
 594
 595 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
 596                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 597                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 598                                                    EVP_PKEY *pkey))
 599 {
 600     if (pparamgen_init)
 601         *pparamgen_init = pmeth->paramgen_init;
 602     if (pparamgen)
 603         *pparamgen = pmeth->paramgen;
 604 }
 605
 606 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
 607                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 608                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 609                                                EVP_PKEY *pkey))
 610 {
 611     if (pkeygen_init)
 612         *pkeygen_init = pmeth->keygen_init;
 613     if (pkeygen)
 614         *pkeygen = pmeth->keygen;
 615 }
 616
 617 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
 618                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 619                             int (**psign) (EVP_PKEY_CTX *ctx,
 620                                            unsigned char *sig, size_t *siglen,
 621                                            const unsigned char *tbs,
 622                                            size_t tbslen))
 623 {
 624     if (psign_init)
 625         *psign_init = pmeth->sign_init;
 626     if (psign)
 627         *psign = pmeth->sign;
 628 }
 629
 630 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
 631                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 632                               int (**pverify) (EVP_PKEY_CTX *ctx,
 633                                                const unsigned char *sig,
 634                                                size_t siglen,
 635                                                const unsigned char *tbs,
 636                                                size_t tbslen))
 637 {
 638     if (pverify_init)
 639         *pverify_init = pmeth->verify_init;
 640     if (pverify)
 641         *pverify = pmeth->verify;
 642 }
 643
 644 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
 645                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 646                                                                     *ctx),
 647                                       int (**pverify_recover) (EVP_PKEY_CTX
 648                                                                *ctx,
 649                                                                unsigned char
 650                                                                *sig,
 651                                                                size_t *siglen,
 652                                                                const unsigned
 653                                                                char *tbs,
 654                                                                size_t tbslen))
 655 {
 656     if (pverify_recover_init)
 657         *pverify_recover_init = pmeth->verify_recover_init;
 658     if (pverify_recover)
 659         *pverify_recover = pmeth->verify_recover;
 660 }
 661
 662 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
 663                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 664                                                       EVP_MD_CTX *mctx),
 665                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 666                                                  unsigned char *sig,
 667                                                  size_t *siglen,
 668                                                  EVP_MD_CTX *mctx))
 669 {
 670     if (psignctx_init)
 671         *psignctx_init = pmeth->signctx_init;
 672     if (psignctx)
 673         *psignctx = pmeth->signctx;
 674 }
 675
 676 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
 677                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 678                                                           EVP_MD_CTX *mctx),
 679                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 680                                                      const unsigned char *sig,
 681                                                      int siglen,
 682                                                      EVP_MD_CTX *mctx))
 683 {
 684     if (pverifyctx_init)
 685         *pverifyctx_init = pmeth->verifyctx_init;
 686     if (pverifyctx)
 687         *pverifyctx = pmeth->verifyctx;
 688 }
 689
 690 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
 691                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 692                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 693                                                    unsigned char *out,
 694                                                    size_t *outlen,
 695                                                    const unsigned char *in,
 696                                                    size_t inlen))
 697 {
 698     if (pencrypt_init)
 699         *pencrypt_init = pmeth->encrypt_init;
 700     if (pencryptfn)
 701         *pencryptfn = pmeth->encrypt;
 702 }
 703
 704 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
 705                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 706                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 707                                                  unsigned char *out,
 708                                                  size_t *outlen,
 709                                                  const unsigned char *in,
 710                                                  size_t inlen))
 711 {
 712     if (pdecrypt_init)
 713         *pdecrypt_init = pmeth->decrypt_init;
 714     if (pdecrypt)
 715         *pdecrypt = pmeth->decrypt;
 716 }
 717
 718 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
 719                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 720                               int (**pderive) (EVP_PKEY_CTX *ctx,
 721                                                unsigned char *key,
 722                                                size_t *keylen))
 723 {
 724     if (pderive_init)
 725         *pderive_init = pmeth->derive_init;
 726     if (pderive)
 727         *pderive = pmeth->derive;
 728 }
 729
 730 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
 731                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 732                                            void *p2),
 733                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 734                                                const char *type,
 735                                                const char *value))
 736 {
 737     if (pctrl)
 738         *pctrl = pmeth->ctrl;
 739     if (pctrl_str)
 740         *pctrl_str = pmeth->ctrl_str;
 741 }