crypto/evp/pmeth_lib.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 2006.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include "internal/cryptlib.h"
  62 #ifndef OPENSSL_NO_ENGINE
  63 # include <openssl/engine.h>
  64 #endif
  65 #include <openssl/evp.h>
  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 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  72
  73 static const EVP_PKEY_METHOD *standard_methods[] = {
  74 #ifndef OPENSSL_NO_RSA
  75     &rsa_pkey_meth,
  76 #endif
  77 #ifndef OPENSSL_NO_DH
  78     &dh_pkey_meth,
  79 #endif
  80 #ifndef OPENSSL_NO_DSA
  81     &dsa_pkey_meth,
  82 #endif
  83 #ifndef OPENSSL_NO_EC
  84     &ec_pkey_meth,
  85 #endif
  86     &hmac_pkey_meth,
  87     &cmac_pkey_meth,
  88 #ifndef OPENSSL_NO_DH
  89     &dhx_pkey_meth,
  90 #endif
  91     &tls1_prf_pkey_meth
  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. Otherwise 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 == NULL) {
 164 #ifndef OPENSSL_NO_ENGINE
 165         ENGINE_finish(e);
 166 #endif
 167         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 168         return NULL;
 169     }
 170     ret->engine = e;
 171     ret->pmeth = pmeth;
 172     ret->operation = EVP_PKEY_OP_UNDEFINED;
 173     ret->pkey = pkey;
 174     if (pkey)
 175         CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 176
 177     if (pmeth->init) {
 178         if (pmeth->init(ret) <= 0) {
 179             EVP_PKEY_CTX_free(ret);
 180             return NULL;
 181         }
 182     }
 183
 184     return ret;
 185 }
 186
 187 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 188 {
 189     EVP_PKEY_METHOD *pmeth;
 190
 191     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 192     if (pmeth == NULL)
 193         return NULL;
 194
 195     pmeth->pkey_id = id;
 196     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 197     return pmeth;
 198 }
 199
 200 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 201                              const EVP_PKEY_METHOD *meth)
 202 {
 203     if (ppkey_id)
 204         *ppkey_id = meth->pkey_id;
 205     if (pflags)
 206         *pflags = meth->flags;
 207 }
 208
 209 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 210 {
 211
 212     dst->init = src->init;
 213     dst->copy = src->copy;
 214     dst->cleanup = src->cleanup;
 215
 216     dst->paramgen_init = src->paramgen_init;
 217     dst->paramgen = src->paramgen;
 218
 219     dst->keygen_init = src->keygen_init;
 220     dst->keygen = src->keygen;
 221
 222     dst->sign_init = src->sign_init;
 223     dst->sign = src->sign;
 224
 225     dst->verify_init = src->verify_init;
 226     dst->verify = src->verify;
 227
 228     dst->verify_recover_init = src->verify_recover_init;
 229     dst->verify_recover = src->verify_recover;
 230
 231     dst->signctx_init = src->signctx_init;
 232     dst->signctx = src->signctx;
 233
 234     dst->verifyctx_init = src->verifyctx_init;
 235     dst->verifyctx = src->verifyctx;
 236
 237     dst->encrypt_init = src->encrypt_init;
 238     dst->encrypt = src->encrypt;
 239
 240     dst->decrypt_init = src->decrypt_init;
 241     dst->decrypt = src->decrypt;
 242
 243     dst->derive_init = src->derive_init;
 244     dst->derive = src->derive;
 245
 246     dst->ctrl = src->ctrl;
 247     dst->ctrl_str = src->ctrl_str;
 248 }
 249
 250 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 251 {
 252     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 253         OPENSSL_free(pmeth);
 254 }
 255
 256 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 257 {
 258     return int_ctx_new(pkey, e, -1);
 259 }
 260
 261 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 262 {
 263     return int_ctx_new(NULL, e, id);
 264 }
 265
 266 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 267 {
 268     EVP_PKEY_CTX *rctx;
 269     if (!pctx->pmeth || !pctx->pmeth->copy)
 270         return NULL;
 271 #ifndef OPENSSL_NO_ENGINE
 272     /* Make sure it's safe to copy a pkey context using an ENGINE */
 273     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 274         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 275         return 0;
 276     }
 277 #endif
 278     rctx = OPENSSL_malloc(sizeof(*rctx));
 279     if (rctx == NULL)
 280         return NULL;
 281
 282     rctx->pmeth = pctx->pmeth;
 283 #ifndef OPENSSL_NO_ENGINE
 284     rctx->engine = pctx->engine;
 285 #endif
 286
 287     if (pctx->pkey)
 288         CRYPTO_add(&pctx->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 289
 290     rctx->pkey = pctx->pkey;
 291
 292     if (pctx->peerkey)
 293         CRYPTO_add(&pctx->peerkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 294
 295     rctx->peerkey = pctx->peerkey;
 296
 297     rctx->data = NULL;
 298     rctx->app_data = NULL;
 299     rctx->operation = pctx->operation;
 300
 301     if (pctx->pmeth->copy(rctx, pctx) > 0)
 302         return rctx;
 303
 304     EVP_PKEY_CTX_free(rctx);
 305     return NULL;
 306
 307 }
 308
 309 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 310 {
 311     if (app_pkey_methods == NULL) {
 312         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 313         if (app_pkey_methods == NULL)
 314             return 0;
 315     }
 316     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
 317         return 0;
 318     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 319     return 1;
 320 }
 321
 322 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 323 {
 324     if (ctx == NULL)
 325         return;
 326     if (ctx->pmeth && ctx->pmeth->cleanup)
 327         ctx->pmeth->cleanup(ctx);
 328     EVP_PKEY_free(ctx->pkey);
 329     EVP_PKEY_free(ctx->peerkey);
 330 #ifndef OPENSSL_NO_ENGINE
 331     ENGINE_finish(ctx->engine);
 332 #endif
 333     OPENSSL_free(ctx);
 334 }
 335
 336 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 337                       int cmd, int p1, void *p2)
 338 {
 339     int ret;
 340     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 341         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 342         return -2;
 343     }
 344     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 345         return -1;
 346
 347     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 348         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 349         return -1;
 350     }
 351
 352     if ((optype != -1) && !(ctx->operation & optype)) {
 353         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 354         return -1;
 355     }
 356
 357     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 358
 359     if (ret == -2)
 360         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 361
 362     return ret;
 363
 364 }
 365
 366 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 367                           const char *name, const char *value)
 368 {
 369     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 370         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 371         return -2;
 372     }
 373     if (strcmp(name, "digest") == 0) {
 374         const EVP_MD *md;
 375         if (value == NULL || (md = EVP_get_digestbyname(value)) == NULL) {
 376             EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
 377             return 0;
 378         }
 379         return EVP_PKEY_CTX_set_signature_md(ctx, md);
 380     }
 381     return ctx->pmeth->ctrl_str(ctx, name, value);
 382 }
 383
 384 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 385 {
 386     return ctx->operation;
 387 }
 388
 389 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 390 {
 391     ctx->keygen_info = dat;
 392     ctx->keygen_info_count = datlen;
 393 }
 394
 395 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 396 {
 397     ctx->data = data;
 398 }
 399
 400 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 401 {
 402     return ctx->data;
 403 }
 404
 405 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 406 {
 407     return ctx->pkey;
 408 }
 409
 410 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 411 {
 412     return ctx->peerkey;
 413 }
 414
 415 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 416 {
 417     ctx->app_data = data;
 418 }
 419
 420 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 421 {
 422     return ctx->app_data;
 423 }
 424
 425 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 426                             int (*init) (EVP_PKEY_CTX *ctx))
 427 {
 428     pmeth->init = init;
 429 }
 430
 431 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 432                             int (*copy) (EVP_PKEY_CTX *dst,
 433                                          EVP_PKEY_CTX *src))
 434 {
 435     pmeth->copy = copy;
 436 }
 437
 438 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 439                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 440 {
 441     pmeth->cleanup = cleanup;
 442 }
 443
 444 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 445                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 446                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 447                                                  EVP_PKEY *pkey))
 448 {
 449     pmeth->paramgen_init = paramgen_init;
 450     pmeth->paramgen = paramgen;
 451 }
 452
 453 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 454                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 455                               int (*keygen) (EVP_PKEY_CTX *ctx,
 456                                              EVP_PKEY *pkey))
 457 {
 458     pmeth->keygen_init = keygen_init;
 459     pmeth->keygen = keygen;
 460 }
 461
 462 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 463                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 464                             int (*sign) (EVP_PKEY_CTX *ctx,
 465                                          unsigned char *sig, size_t *siglen,
 466                                          const unsigned char *tbs,
 467                                          size_t tbslen))
 468 {
 469     pmeth->sign_init = sign_init;
 470     pmeth->sign = sign;
 471 }
 472
 473 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 474                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 475                               int (*verify) (EVP_PKEY_CTX *ctx,
 476                                              const unsigned char *sig,
 477                                              size_t siglen,
 478                                              const unsigned char *tbs,
 479                                              size_t tbslen))
 480 {
 481     pmeth->verify_init = verify_init;
 482     pmeth->verify = verify;
 483 }
 484
 485 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 486                                       int (*verify_recover_init) (EVP_PKEY_CTX
 487                                                                   *ctx),
 488                                       int (*verify_recover) (EVP_PKEY_CTX
 489                                                              *ctx,
 490                                                              unsigned char
 491                                                              *sig,
 492                                                              size_t *siglen,
 493                                                              const unsigned
 494                                                              char *tbs,
 495                                                              size_t tbslen))
 496 {
 497     pmeth->verify_recover_init = verify_recover_init;
 498     pmeth->verify_recover = verify_recover;
 499 }
 500
 501 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 502                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 503                                                     EVP_MD_CTX *mctx),
 504                                int (*signctx) (EVP_PKEY_CTX *ctx,
 505                                                unsigned char *sig,
 506                                                size_t *siglen,
 507                                                EVP_MD_CTX *mctx))
 508 {
 509     pmeth->signctx_init = signctx_init;
 510     pmeth->signctx = signctx;
 511 }
 512
 513 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 514                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 515                                                         EVP_MD_CTX *mctx),
 516                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 517                                                    const unsigned char *sig,
 518                                                    int siglen,
 519                                                    EVP_MD_CTX *mctx))
 520 {
 521     pmeth->verifyctx_init = verifyctx_init;
 522     pmeth->verifyctx = verifyctx;
 523 }
 524
 525 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 526                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 527                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 528                                                  unsigned char *out,
 529                                                  size_t *outlen,
 530                                                  const unsigned char *in,
 531                                                  size_t inlen))
 532 {
 533     pmeth->encrypt_init = encrypt_init;
 534     pmeth->encrypt = encryptfn;
 535 }
 536
 537 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 538                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 539                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 540                                                unsigned char *out,
 541                                                size_t *outlen,
 542                                                const unsigned char *in,
 543                                                size_t inlen))
 544 {
 545     pmeth->decrypt_init = decrypt_init;
 546     pmeth->decrypt = decrypt;
 547 }
 548
 549 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 550                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 551                               int (*derive) (EVP_PKEY_CTX *ctx,
 552                                              unsigned char *key,
 553                                              size_t *keylen))
 554 {
 555     pmeth->derive_init = derive_init;
 556     pmeth->derive = derive;
 557 }
 558
 559 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 560                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 561                                          void *p2),
 562                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 563                                              const char *type,
 564                                              const char *value))
 565 {
 566     pmeth->ctrl = ctrl;
 567     pmeth->ctrl_str = ctrl_str;
 568 }
 569
 570 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
 571                             int (**pinit) (EVP_PKEY_CTX *ctx))
 572 {
 573     *pinit = pmeth->init;
 574 }
 575
 576 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
 577                             int (**pcopy) (EVP_PKEY_CTX *dst,
 578                                            EVP_PKEY_CTX *src))
 579 {
 580     *pcopy = pmeth->copy;
 581 }
 582
 583 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
 584                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 585 {
 586     *pcleanup = pmeth->cleanup;
 587 }
 588
 589 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
 590                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 591                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 592                                                    EVP_PKEY *pkey))
 593 {
 594     if (pparamgen_init)
 595         *pparamgen_init = pmeth->paramgen_init;
 596     if (pparamgen)
 597         *pparamgen = pmeth->paramgen;
 598 }
 599
 600 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
 601                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 602                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 603                                                EVP_PKEY *pkey))
 604 {
 605     if (pkeygen_init)
 606         *pkeygen_init = pmeth->keygen_init;
 607     if (pkeygen)
 608         *pkeygen = pmeth->keygen;
 609 }
 610
 611 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
 612                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 613                             int (**psign) (EVP_PKEY_CTX *ctx,
 614                                            unsigned char *sig, size_t *siglen,
 615                                            const unsigned char *tbs,
 616                                            size_t tbslen))
 617 {
 618     if (psign_init)
 619         *psign_init = pmeth->sign_init;
 620     if (psign)
 621         *psign = pmeth->sign;
 622 }
 623
 624 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
 625                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 626                               int (**pverify) (EVP_PKEY_CTX *ctx,
 627                                                const unsigned char *sig,
 628                                                size_t siglen,
 629                                                const unsigned char *tbs,
 630                                                size_t tbslen))
 631 {
 632     if (pverify_init)
 633         *pverify_init = pmeth->verify_init;
 634     if (pverify)
 635         *pverify = pmeth->verify;
 636 }
 637
 638 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
 639                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 640                                                                     *ctx),
 641                                       int (**pverify_recover) (EVP_PKEY_CTX
 642                                                                *ctx,
 643                                                                unsigned char
 644                                                                *sig,
 645                                                                size_t *siglen,
 646                                                                const unsigned
 647                                                                char *tbs,
 648                                                                size_t tbslen))
 649 {
 650     if (pverify_recover_init)
 651         *pverify_recover_init = pmeth->verify_recover_init;
 652     if (pverify_recover)
 653         *pverify_recover = pmeth->verify_recover;
 654 }
 655
 656 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
 657                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 658                                                       EVP_MD_CTX *mctx),
 659                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 660                                                  unsigned char *sig,
 661                                                  size_t *siglen,
 662                                                  EVP_MD_CTX *mctx))
 663 {
 664     if (psignctx_init)
 665         *psignctx_init = pmeth->signctx_init;
 666     if (psignctx)
 667         *psignctx = pmeth->signctx;
 668 }
 669
 670 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
 671                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 672                                                           EVP_MD_CTX *mctx),
 673                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 674                                                      const unsigned char *sig,
 675                                                      int siglen,
 676                                                      EVP_MD_CTX *mctx))
 677 {
 678     if (pverifyctx_init)
 679         *pverifyctx_init = pmeth->verifyctx_init;
 680     if (pverifyctx)
 681         *pverifyctx = pmeth->verifyctx;
 682 }
 683
 684 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
 685                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 686                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 687                                                    unsigned char *out,
 688                                                    size_t *outlen,
 689                                                    const unsigned char *in,
 690                                                    size_t inlen))
 691 {
 692     if (pencrypt_init)
 693         *pencrypt_init = pmeth->encrypt_init;
 694     if (pencryptfn)
 695         *pencryptfn = pmeth->encrypt;
 696 }
 697
 698 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
 699                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 700                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 701                                                  unsigned char *out,
 702                                                  size_t *outlen,
 703                                                  const unsigned char *in,
 704                                                  size_t inlen))
 705 {
 706     if (pdecrypt_init)
 707         *pdecrypt_init = pmeth->decrypt_init;
 708     if (pdecrypt)
 709         *pdecrypt = pmeth->decrypt;
 710 }
 711
 712 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
 713                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 714                               int (**pderive) (EVP_PKEY_CTX *ctx,
 715                                                unsigned char *key,
 716                                                size_t *keylen))
 717 {
 718     if (pderive_init)
 719         *pderive_init = pmeth->derive_init;
 720     if (pderive)
 721         *pderive = pmeth->derive;
 722 }
 723
 724 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
 725                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 726                                            void *p2),
 727                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 728                                                const char *type,
 729                                                const char *value))
 730 {
 731     if (pctrl)
 732         *pctrl = pmeth->ctrl;
 733     if (pctrl_str)
 734         *pctrl_str = pmeth->ctrl_str;
 735 }