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 <openssl/evp.h>
  67 #include "internal/asn1_int.h"
  68 #include "internal/evp_int.h"
  69
  70 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  71
  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     &tls1_prf_pkey_meth
  93 };
  94
  95 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  96                            pmeth);
  97
  98 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
  99                      const EVP_PKEY_METHOD *const *b)
 100 {
 101     return ((*a)->pkey_id - (*b)->pkey_id);
 102 }
 103
 104 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
 105                              pmeth);
 106
 107 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
 108 {
 109     EVP_PKEY_METHOD tmp;
 110     const EVP_PKEY_METHOD *t = &tmp, **ret;
 111     tmp.pkey_id = type;
 112     if (app_pkey_methods) {
 113         int idx;
 114         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
 115         if (idx >= 0)
 116             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 117     }
 118     ret = OBJ_bsearch_pmeth(&t, standard_methods,
 119                             sizeof(standard_methods) /
 120                             sizeof(EVP_PKEY_METHOD *));
 121     if (!ret || !*ret)
 122         return NULL;
 123     return *ret;
 124 }
 125
 126 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
 127 {
 128     EVP_PKEY_CTX *ret;
 129     const EVP_PKEY_METHOD *pmeth;
 130     if (id == -1) {
 131         if (!pkey || !pkey->ameth)
 132             return NULL;
 133         id = pkey->ameth->pkey_id;
 134     }
 135 #ifndef OPENSSL_NO_ENGINE
 136     if (pkey && pkey->engine)
 137         e = pkey->engine;
 138     /* Try to find an ENGINE which implements this method */
 139     if (e) {
 140         if (!ENGINE_init(e)) {
 141             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 142             return NULL;
 143         }
 144     } else
 145         e = ENGINE_get_pkey_meth_engine(id);
 146
 147     /*
 148      * If an ENGINE handled this method look it up. Othewise use internal
 149      * tables.
 150      */
 151
 152     if (e)
 153         pmeth = ENGINE_get_pkey_meth(e, id);
 154     else
 155 #endif
 156         pmeth = EVP_PKEY_meth_find(id);
 157
 158     if (pmeth == NULL) {
 159         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 160         return NULL;
 161     }
 162
 163     ret = OPENSSL_zalloc(sizeof(*ret));
 164     if (ret == NULL) {
 165 #ifndef OPENSSL_NO_ENGINE
 166         if (e)
 167             ENGINE_finish(e);
 168 #endif
 169         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 170         return NULL;
 171     }
 172     ret->engine = e;
 173     ret->pmeth = pmeth;
 174     ret->operation = EVP_PKEY_OP_UNDEFINED;
 175     ret->pkey = pkey;
 176     if (pkey)
 177         CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 178
 179     if (pmeth->init) {
 180         if (pmeth->init(ret) <= 0) {
 181             EVP_PKEY_CTX_free(ret);
 182             return NULL;
 183         }
 184     }
 185
 186     return ret;
 187 }
 188
 189 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 190 {
 191     EVP_PKEY_METHOD *pmeth;
 192
 193     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 194     if (pmeth == NULL)
 195         return NULL;
 196
 197     pmeth->pkey_id = id;
 198     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 199     return pmeth;
 200 }
 201
 202 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 203                              const EVP_PKEY_METHOD *meth)
 204 {
 205     if (ppkey_id)
 206         *ppkey_id = meth->pkey_id;
 207     if (pflags)
 208         *pflags = meth->flags;
 209 }
 210
 211 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 212 {
 213
 214     dst->init = src->init;
 215     dst->copy = src->copy;
 216     dst->cleanup = src->cleanup;
 217
 218     dst->paramgen_init = src->paramgen_init;
 219     dst->paramgen = src->paramgen;
 220
 221     dst->keygen_init = src->keygen_init;
 222     dst->keygen = src->keygen;
 223
 224     dst->sign_init = src->sign_init;
 225     dst->sign = src->sign;
 226
 227     dst->verify_init = src->verify_init;
 228     dst->verify = src->verify;
 229
 230     dst->verify_recover_init = src->verify_recover_init;
 231     dst->verify_recover = src->verify_recover;
 232
 233     dst->signctx_init = src->signctx_init;
 234     dst->signctx = src->signctx;
 235
 236     dst->verifyctx_init = src->verifyctx_init;
 237     dst->verifyctx = src->verifyctx;
 238
 239     dst->encrypt_init = src->encrypt_init;
 240     dst->encrypt = src->encrypt;
 241
 242     dst->decrypt_init = src->decrypt_init;
 243     dst->decrypt = src->decrypt;
 244
 245     dst->derive_init = src->derive_init;
 246     dst->derive = src->derive;
 247
 248     dst->ctrl = src->ctrl;
 249     dst->ctrl_str = src->ctrl_str;
 250 }
 251
 252 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 253 {
 254     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 255         OPENSSL_free(pmeth);
 256 }
 257
 258 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 259 {
 260     return int_ctx_new(pkey, e, -1);
 261 }
 262
 263 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 264 {
 265     return int_ctx_new(NULL, e, id);
 266 }
 267
 268 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 269 {
 270     EVP_PKEY_CTX *rctx;
 271     if (!pctx->pmeth || !pctx->pmeth->copy)
 272         return NULL;
 273 #ifndef OPENSSL_NO_ENGINE
 274     /* Make sure it's safe to copy a pkey context using an ENGINE */
 275     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 276         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 277         return 0;
 278     }
 279 #endif
 280     rctx = OPENSSL_malloc(sizeof(*rctx));
 281     if (rctx == NULL)
 282         return NULL;
 283
 284     rctx->pmeth = pctx->pmeth;
 285 #ifndef OPENSSL_NO_ENGINE
 286     rctx->engine = pctx->engine;
 287 #endif
 288
 289     if (pctx->pkey)
 290         CRYPTO_add(&pctx->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 291
 292     rctx->pkey = pctx->pkey;
 293
 294     if (pctx->peerkey)
 295         CRYPTO_add(&pctx->peerkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 296
 297     rctx->peerkey = pctx->peerkey;
 298
 299     rctx->data = NULL;
 300     rctx->app_data = NULL;
 301     rctx->operation = pctx->operation;
 302
 303     if (pctx->pmeth->copy(rctx, pctx) > 0)
 304         return rctx;
 305
 306     EVP_PKEY_CTX_free(rctx);
 307     return NULL;
 308
 309 }
 310
 311 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 312 {
 313     if (app_pkey_methods == NULL) {
 314         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 315         if (app_pkey_methods == NULL)
 316             return 0;
 317     }
 318     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
 319         return 0;
 320     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 321     return 1;
 322 }
 323
 324 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 325 {
 326     if (ctx == NULL)
 327         return;
 328     if (ctx->pmeth && ctx->pmeth->cleanup)
 329         ctx->pmeth->cleanup(ctx);
 330     EVP_PKEY_free(ctx->pkey);
 331     EVP_PKEY_free(ctx->peerkey);
 332 #ifndef OPENSSL_NO_ENGINE
 333     if (ctx->engine)
 334         /*
 335          * The EVP_PKEY_CTX we used belongs to an ENGINE, release the
 336          * functional reference we held for this reason.
 337          */
 338         ENGINE_finish(ctx->engine);
 339 #endif
 340     OPENSSL_free(ctx);
 341 }
 342
 343 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 344                       int cmd, int p1, void *p2)
 345 {
 346     int ret;
 347     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 348         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 349         return -2;
 350     }
 351     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 352         return -1;
 353
 354     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 355         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 356         return -1;
 357     }
 358
 359     if ((optype != -1) && !(ctx->operation & optype)) {
 360         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 361         return -1;
 362     }
 363
 364     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 365
 366     if (ret == -2)
 367         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 368
 369     return ret;
 370
 371 }
 372
 373 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 374                           const char *name, const char *value)
 375 {
 376     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 377         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 378         return -2;
 379     }
 380     if (strcmp(name, "digest") == 0) {
 381         const EVP_MD *md;
 382         if (value == NULL || (md = EVP_get_digestbyname(value)) == NULL) {
 383             EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
 384             return 0;
 385         }
 386         return EVP_PKEY_CTX_set_signature_md(ctx, md);
 387     }
 388     return ctx->pmeth->ctrl_str(ctx, name, value);
 389 }
 390
 391 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 392 {
 393     return ctx->operation;
 394 }
 395
 396 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 397 {
 398     ctx->keygen_info = dat;
 399     ctx->keygen_info_count = datlen;
 400 }
 401
 402 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 403 {
 404     ctx->data = data;
 405 }
 406
 407 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 408 {
 409     return ctx->data;
 410 }
 411
 412 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 413 {
 414     return ctx->pkey;
 415 }
 416
 417 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 418 {
 419     return ctx->peerkey;
 420 }
 421
 422 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 423 {
 424     ctx->app_data = data;
 425 }
 426
 427 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 428 {
 429     return ctx->app_data;
 430 }
 431
 432 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 433                             int (*init) (EVP_PKEY_CTX *ctx))
 434 {
 435     pmeth->init = init;
 436 }
 437
 438 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 439                             int (*copy) (EVP_PKEY_CTX *dst,
 440                                          EVP_PKEY_CTX *src))
 441 {
 442     pmeth->copy = copy;
 443 }
 444
 445 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 446                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 447 {
 448     pmeth->cleanup = cleanup;
 449 }
 450
 451 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 452                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 453                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 454                                                  EVP_PKEY *pkey))
 455 {
 456     pmeth->paramgen_init = paramgen_init;
 457     pmeth->paramgen = paramgen;
 458 }
 459
 460 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 461                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 462                               int (*keygen) (EVP_PKEY_CTX *ctx,
 463                                              EVP_PKEY *pkey))
 464 {
 465     pmeth->keygen_init = keygen_init;
 466     pmeth->keygen = keygen;
 467 }
 468
 469 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 470                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 471                             int (*sign) (EVP_PKEY_CTX *ctx,
 472                                          unsigned char *sig, size_t *siglen,
 473                                          const unsigned char *tbs,
 474                                          size_t tbslen))
 475 {
 476     pmeth->sign_init = sign_init;
 477     pmeth->sign = sign;
 478 }
 479
 480 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 481                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 482                               int (*verify) (EVP_PKEY_CTX *ctx,
 483                                              const unsigned char *sig,
 484                                              size_t siglen,
 485                                              const unsigned char *tbs,
 486                                              size_t tbslen))
 487 {
 488     pmeth->verify_init = verify_init;
 489     pmeth->verify = verify;
 490 }
 491
 492 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 493                                       int (*verify_recover_init) (EVP_PKEY_CTX
 494                                                                   *ctx),
 495                                       int (*verify_recover) (EVP_PKEY_CTX
 496                                                              *ctx,
 497                                                              unsigned char
 498                                                              *sig,
 499                                                              size_t *siglen,
 500                                                              const unsigned
 501                                                              char *tbs,
 502                                                              size_t tbslen))
 503 {
 504     pmeth->verify_recover_init = verify_recover_init;
 505     pmeth->verify_recover = verify_recover;
 506 }
 507
 508 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 509                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 510                                                     EVP_MD_CTX *mctx),
 511                                int (*signctx) (EVP_PKEY_CTX *ctx,
 512                                                unsigned char *sig,
 513                                                size_t *siglen,
 514                                                EVP_MD_CTX *mctx))
 515 {
 516     pmeth->signctx_init = signctx_init;
 517     pmeth->signctx = signctx;
 518 }
 519
 520 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 521                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 522                                                         EVP_MD_CTX *mctx),
 523                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 524                                                    const unsigned char *sig,
 525                                                    int siglen,
 526                                                    EVP_MD_CTX *mctx))
 527 {
 528     pmeth->verifyctx_init = verifyctx_init;
 529     pmeth->verifyctx = verifyctx;
 530 }
 531
 532 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 533                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 534                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 535                                                  unsigned char *out,
 536                                                  size_t *outlen,
 537                                                  const unsigned char *in,
 538                                                  size_t inlen))
 539 {
 540     pmeth->encrypt_init = encrypt_init;
 541     pmeth->encrypt = encryptfn;
 542 }
 543
 544 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 545                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 546                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 547                                                unsigned char *out,
 548                                                size_t *outlen,
 549                                                const unsigned char *in,
 550                                                size_t inlen))
 551 {
 552     pmeth->decrypt_init = decrypt_init;
 553     pmeth->decrypt = decrypt;
 554 }
 555
 556 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 557                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 558                               int (*derive) (EVP_PKEY_CTX *ctx,
 559                                              unsigned char *key,
 560                                              size_t *keylen))
 561 {
 562     pmeth->derive_init = derive_init;
 563     pmeth->derive = derive;
 564 }
 565
 566 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 567                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 568                                          void *p2),
 569                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 570                                              const char *type,
 571                                              const char *value))
 572 {
 573     pmeth->ctrl = ctrl;
 574     pmeth->ctrl_str = ctrl_str;
 575 }
 576
 577 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
 578                             int (**pinit) (EVP_PKEY_CTX *ctx))
 579 {
 580     *pinit = pmeth->init;
 581 }
 582
 583 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
 584                             int (**pcopy) (EVP_PKEY_CTX *dst,
 585                                            EVP_PKEY_CTX *src))
 586 {
 587     *pcopy = pmeth->copy;
 588 }
 589
 590 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
 591                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 592 {
 593     *pcleanup = pmeth->cleanup;
 594 }
 595
 596 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
 597                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 598                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 599                                                    EVP_PKEY *pkey))
 600 {
 601     if (pparamgen_init)
 602         *pparamgen_init = pmeth->paramgen_init;
 603     if (pparamgen)
 604         *pparamgen = pmeth->paramgen;
 605 }
 606
 607 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
 608                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 609                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 610                                                EVP_PKEY *pkey))
 611 {
 612     if (pkeygen_init)
 613         *pkeygen_init = pmeth->keygen_init;
 614     if (pkeygen)
 615         *pkeygen = pmeth->keygen;
 616 }
 617
 618 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
 619                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 620                             int (**psign) (EVP_PKEY_CTX *ctx,
 621                                            unsigned char *sig, size_t *siglen,
 622                                            const unsigned char *tbs,
 623                                            size_t tbslen))
 624 {
 625     if (psign_init)
 626         *psign_init = pmeth->sign_init;
 627     if (psign)
 628         *psign = pmeth->sign;
 629 }
 630
 631 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
 632                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 633                               int (**pverify) (EVP_PKEY_CTX *ctx,
 634                                                const unsigned char *sig,
 635                                                size_t siglen,
 636                                                const unsigned char *tbs,
 637                                                size_t tbslen))
 638 {
 639     if (pverify_init)
 640         *pverify_init = pmeth->verify_init;
 641     if (pverify)
 642         *pverify = pmeth->verify;
 643 }
 644
 645 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
 646                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 647                                                                     *ctx),
 648                                       int (**pverify_recover) (EVP_PKEY_CTX
 649                                                                *ctx,
 650                                                                unsigned char
 651                                                                *sig,
 652                                                                size_t *siglen,
 653                                                                const unsigned
 654                                                                char *tbs,
 655                                                                size_t tbslen))
 656 {
 657     if (pverify_recover_init)
 658         *pverify_recover_init = pmeth->verify_recover_init;
 659     if (pverify_recover)
 660         *pverify_recover = pmeth->verify_recover;
 661 }
 662
 663 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
 664                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 665                                                       EVP_MD_CTX *mctx),
 666                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 667                                                  unsigned char *sig,
 668                                                  size_t *siglen,
 669                                                  EVP_MD_CTX *mctx))
 670 {
 671     if (psignctx_init)
 672         *psignctx_init = pmeth->signctx_init;
 673     if (psignctx)
 674         *psignctx = pmeth->signctx;
 675 }
 676
 677 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
 678                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 679                                                           EVP_MD_CTX *mctx),
 680                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 681                                                      const unsigned char *sig,
 682                                                      int siglen,
 683                                                      EVP_MD_CTX *mctx))
 684 {
 685     if (pverifyctx_init)
 686         *pverifyctx_init = pmeth->verifyctx_init;
 687     if (pverifyctx)
 688         *pverifyctx = pmeth->verifyctx;
 689 }
 690
 691 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
 692                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 693                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 694                                                    unsigned char *out,
 695                                                    size_t *outlen,
 696                                                    const unsigned char *in,
 697                                                    size_t inlen))
 698 {
 699     if (pencrypt_init)
 700         *pencrypt_init = pmeth->encrypt_init;
 701     if (pencryptfn)
 702         *pencryptfn = pmeth->encrypt;
 703 }
 704
 705 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
 706                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 707                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 708                                                  unsigned char *out,
 709                                                  size_t *outlen,
 710                                                  const unsigned char *in,
 711                                                  size_t inlen))
 712 {
 713     if (pdecrypt_init)
 714         *pdecrypt_init = pmeth->decrypt_init;
 715     if (pdecrypt)
 716         *pdecrypt = pmeth->decrypt;
 717 }
 718
 719 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
 720                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 721                               int (**pderive) (EVP_PKEY_CTX *ctx,
 722                                                unsigned char *key,
 723                                                size_t *keylen))
 724 {
 725     if (pderive_init)
 726         *pderive_init = pmeth->derive_init;
 727     if (pderive)
 728         *pderive = pmeth->derive;
 729 }
 730
 731 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
 732                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 733                                            void *p2),
 734                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 735                                                const char *type,
 736                                                const char *value))
 737 {
 738     if (pctrl)
 739         *pctrl = pmeth->ctrl;
 740     if (pctrl_str)
 741         *pctrl_str = pmeth->ctrl_str;
 742 }