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 #include <openssl/cmac.h>
  64 #include <openssl/dh.h>
  65 #include <openssl/dsa.h>
  66 #include <openssl/evp.h>
  67 #include <openssl/hmac.h>
  68 #include <openssl/objects.h>
  69 #include <openssl/rsa.h>
  70 #ifndef OPENSSL_NO_ENGINE
  71 # include <openssl/engine.h>
  72 #endif
  73 #include "internal/asn1_int.h"
  74 #include "internal/evp_int.h"
  75
  76 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  77
  78 DECLARE_STACK_OF(EVP_PKEY_METHOD)
  79 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  80
  81 static const EVP_PKEY_METHOD *standard_methods[] = {
  82 #ifndef OPENSSL_NO_RSA
  83     &rsa_pkey_meth,
  84 #endif
  85 #ifndef OPENSSL_NO_DH
  86     &dh_pkey_meth,
  87 #endif
  88 #ifndef OPENSSL_NO_DSA
  89     &dsa_pkey_meth,
  90 #endif
  91 #ifndef OPENSSL_NO_EC
  92     &ec_pkey_meth,
  93 #endif
  94     &hmac_pkey_meth,
  95     &cmac_pkey_meth,
  96 #ifndef OPENSSL_NO_DH
  97     &dhx_pkey_meth
  98 #endif
  99 };
 100
 101 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
 102                            pmeth);
 103
 104 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
 105                      const EVP_PKEY_METHOD *const *b)
 106 {
 107     return ((*a)->pkey_id - (*b)->pkey_id);
 108 }
 109
 110 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
 111                              pmeth);
 112
 113 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
 114 {
 115     EVP_PKEY_METHOD tmp;
 116     const EVP_PKEY_METHOD *t = &tmp, **ret;
 117     tmp.pkey_id = type;
 118     if (app_pkey_methods) {
 119         int idx;
 120         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
 121         if (idx >= 0)
 122             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 123     }
 124     ret = OBJ_bsearch_pmeth(&t, standard_methods,
 125                             sizeof(standard_methods) /
 126                             sizeof(EVP_PKEY_METHOD *));
 127     if (!ret || !*ret)
 128         return NULL;
 129     return *ret;
 130 }
 131
 132 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
 133 {
 134     EVP_PKEY_CTX *ret;
 135     const EVP_PKEY_METHOD *pmeth;
 136     if (id == -1) {
 137         if (!pkey || !pkey->ameth)
 138             return NULL;
 139         id = pkey->ameth->pkey_id;
 140     }
 141 #ifndef OPENSSL_NO_ENGINE
 142     if (pkey && pkey->engine)
 143         e = pkey->engine;
 144     /* Try to find an ENGINE which implements this method */
 145     if (e) {
 146         if (!ENGINE_init(e)) {
 147             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 148             return NULL;
 149         }
 150     } else
 151         e = ENGINE_get_pkey_meth_engine(id);
 152
 153     /*
 154      * If an ENGINE handled this method look it up. Othewise use internal
 155      * tables.
 156      */
 157
 158     if (e)
 159         pmeth = ENGINE_get_pkey_meth(e, id);
 160     else
 161 #endif
 162         pmeth = EVP_PKEY_meth_find(id);
 163
 164     if (pmeth == NULL) {
 165         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 166         return NULL;
 167     }
 168
 169     ret = OPENSSL_zalloc(sizeof(*ret));
 170     if (!ret) {
 171 #ifndef OPENSSL_NO_ENGINE
 172         if (e)
 173             ENGINE_finish(e);
 174 #endif
 175         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 176         return NULL;
 177     }
 178     ret->engine = e;
 179     ret->pmeth = pmeth;
 180     ret->operation = EVP_PKEY_OP_UNDEFINED;
 181     ret->pkey = pkey;
 182     if (pkey)
 183         CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 184
 185     if (pmeth->init) {
 186         if (pmeth->init(ret) <= 0) {
 187             EVP_PKEY_CTX_free(ret);
 188             return NULL;
 189         }
 190     }
 191
 192     return ret;
 193 }
 194
 195 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 196 {
 197     EVP_PKEY_METHOD *pmeth;
 198
 199     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 200     if (!pmeth)
 201         return NULL;
 202
 203     pmeth->pkey_id = id;
 204     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 205     return pmeth;
 206 }
 207
 208 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 209                              const EVP_PKEY_METHOD *meth)
 210 {
 211     if (ppkey_id)
 212         *ppkey_id = meth->pkey_id;
 213     if (pflags)
 214         *pflags = meth->flags;
 215 }
 216
 217 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 218 {
 219
 220     dst->init = src->init;
 221     dst->copy = src->copy;
 222     dst->cleanup = src->cleanup;
 223
 224     dst->paramgen_init = src->paramgen_init;
 225     dst->paramgen = src->paramgen;
 226
 227     dst->keygen_init = src->keygen_init;
 228     dst->keygen = src->keygen;
 229
 230     dst->sign_init = src->sign_init;
 231     dst->sign = src->sign;
 232
 233     dst->verify_init = src->verify_init;
 234     dst->verify = src->verify;
 235
 236     dst->verify_recover_init = src->verify_recover_init;
 237     dst->verify_recover = src->verify_recover;
 238
 239     dst->signctx_init = src->signctx_init;
 240     dst->signctx = src->signctx;
 241
 242     dst->verifyctx_init = src->verifyctx_init;
 243     dst->verifyctx = src->verifyctx;
 244
 245     dst->encrypt_init = src->encrypt_init;
 246     dst->encrypt = src->encrypt;
 247
 248     dst->decrypt_init = src->decrypt_init;
 249     dst->decrypt = src->decrypt;
 250
 251     dst->derive_init = src->derive_init;
 252     dst->derive = src->derive;
 253
 254     dst->ctrl = src->ctrl;
 255     dst->ctrl_str = src->ctrl_str;
 256 }
 257
 258 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 259 {
 260     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 261         OPENSSL_free(pmeth);
 262 }
 263
 264 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 265 {
 266     return int_ctx_new(pkey, e, -1);
 267 }
 268
 269 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 270 {
 271     return int_ctx_new(NULL, e, id);
 272 }
 273
 274 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 275 {
 276     EVP_PKEY_CTX *rctx;
 277     if (!pctx->pmeth || !pctx->pmeth->copy)
 278         return NULL;
 279 #ifndef OPENSSL_NO_ENGINE
 280     /* Make sure it's safe to copy a pkey context using an ENGINE */
 281     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 282         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 283         return 0;
 284     }
 285 #endif
 286     rctx = OPENSSL_malloc(sizeof(*rctx));
 287     if (!rctx)
 288         return NULL;
 289
 290     rctx->pmeth = pctx->pmeth;
 291 #ifndef OPENSSL_NO_ENGINE
 292     rctx->engine = pctx->engine;
 293 #endif
 294
 295     if (pctx->pkey)
 296         CRYPTO_add(&pctx->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 297
 298     rctx->pkey = pctx->pkey;
 299
 300     if (pctx->peerkey)
 301         CRYPTO_add(&pctx->peerkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 302
 303     rctx->peerkey = pctx->peerkey;
 304
 305     rctx->data = NULL;
 306     rctx->app_data = NULL;
 307     rctx->operation = pctx->operation;
 308
 309     if (pctx->pmeth->copy(rctx, pctx) > 0)
 310         return rctx;
 311
 312     EVP_PKEY_CTX_free(rctx);
 313     return NULL;
 314
 315 }
 316
 317 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 318 {
 319     if (app_pkey_methods == NULL) {
 320         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 321         if (!app_pkey_methods)
 322             return 0;
 323     }
 324     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
 325         return 0;
 326     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 327     return 1;
 328 }
 329
 330 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 331 {
 332     if (ctx == NULL)
 333         return;
 334     if (ctx->pmeth && ctx->pmeth->cleanup)
 335         ctx->pmeth->cleanup(ctx);
 336     EVP_PKEY_free(ctx->pkey);
 337     EVP_PKEY_free(ctx->peerkey);
 338 #ifndef OPENSSL_NO_ENGINE
 339     if (ctx->engine)
 340         /*
 341          * The EVP_PKEY_CTX we used belongs to an ENGINE, release the
 342          * functional reference we held for this reason.
 343          */
 344         ENGINE_finish(ctx->engine);
 345 #endif
 346     OPENSSL_free(ctx);
 347 }
 348
 349 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 350                       int cmd, int p1, void *p2)
 351 {
 352     int ret;
 353     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 354         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 355         return -2;
 356     }
 357     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 358         return -1;
 359
 360     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 361         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 362         return -1;
 363     }
 364
 365     if ((optype != -1) && !(ctx->operation & optype)) {
 366         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 367         return -1;
 368     }
 369
 370     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 371
 372     if (ret == -2)
 373         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 374
 375     return ret;
 376
 377 }
 378
 379 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 380                           const char *name, const char *value)
 381 {
 382     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 383         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 384         return -2;
 385     }
 386     if (strcmp(name, "digest") == 0) {
 387         const EVP_MD *md;
 388         if (value == NULL || (md = EVP_get_digestbyname(value)) == NULL) {
 389             EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
 390             return 0;
 391         }
 392         return EVP_PKEY_CTX_set_signature_md(ctx, md);
 393     }
 394     return ctx->pmeth->ctrl_str(ctx, name, value);
 395 }
 396
 397 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 398 {
 399     return ctx->operation;
 400 }
 401
 402 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 403 {
 404     ctx->keygen_info = dat;
 405     ctx->keygen_info_count = datlen;
 406 }
 407
 408 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 409 {
 410     ctx->data = data;
 411 }
 412
 413 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 414 {
 415     return ctx->data;
 416 }
 417
 418 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 419 {
 420     return ctx->pkey;
 421 }
 422
 423 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 424 {
 425     return ctx->peerkey;
 426 }
 427
 428 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 429 {
 430     ctx->app_data = data;
 431 }
 432
 433 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 434 {
 435     return ctx->app_data;
 436 }
 437
 438 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 439                             int (*init) (EVP_PKEY_CTX *ctx))
 440 {
 441     pmeth->init = init;
 442 }
 443
 444 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 445                             int (*copy) (EVP_PKEY_CTX *dst,
 446                                          EVP_PKEY_CTX *src))
 447 {
 448     pmeth->copy = copy;
 449 }
 450
 451 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 452                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 453 {
 454     pmeth->cleanup = cleanup;
 455 }
 456
 457 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 458                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 459                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 460                                                  EVP_PKEY *pkey))
 461 {
 462     pmeth->paramgen_init = paramgen_init;
 463     pmeth->paramgen = paramgen;
 464 }
 465
 466 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 467                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 468                               int (*keygen) (EVP_PKEY_CTX *ctx,
 469                                              EVP_PKEY *pkey))
 470 {
 471     pmeth->keygen_init = keygen_init;
 472     pmeth->keygen = keygen;
 473 }
 474
 475 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 476                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 477                             int (*sign) (EVP_PKEY_CTX *ctx,
 478                                          unsigned char *sig, size_t *siglen,
 479                                          const unsigned char *tbs,
 480                                          size_t tbslen))
 481 {
 482     pmeth->sign_init = sign_init;
 483     pmeth->sign = sign;
 484 }
 485
 486 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 487                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 488                               int (*verify) (EVP_PKEY_CTX *ctx,
 489                                              const unsigned char *sig,
 490                                              size_t siglen,
 491                                              const unsigned char *tbs,
 492                                              size_t tbslen))
 493 {
 494     pmeth->verify_init = verify_init;
 495     pmeth->verify = verify;
 496 }
 497
 498 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 499                                       int (*verify_recover_init) (EVP_PKEY_CTX
 500                                                                   *ctx),
 501                                       int (*verify_recover) (EVP_PKEY_CTX
 502                                                              *ctx,
 503                                                              unsigned char
 504                                                              *sig,
 505                                                              size_t *siglen,
 506                                                              const unsigned
 507                                                              char *tbs,
 508                                                              size_t tbslen))
 509 {
 510     pmeth->verify_recover_init = verify_recover_init;
 511     pmeth->verify_recover = verify_recover;
 512 }
 513
 514 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 515                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 516                                                     EVP_MD_CTX *mctx),
 517                                int (*signctx) (EVP_PKEY_CTX *ctx,
 518                                                unsigned char *sig,
 519                                                size_t *siglen,
 520                                                EVP_MD_CTX *mctx))
 521 {
 522     pmeth->signctx_init = signctx_init;
 523     pmeth->signctx = signctx;
 524 }
 525
 526 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 527                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 528                                                         EVP_MD_CTX *mctx),
 529                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 530                                                    const unsigned char *sig,
 531                                                    int siglen,
 532                                                    EVP_MD_CTX *mctx))
 533 {
 534     pmeth->verifyctx_init = verifyctx_init;
 535     pmeth->verifyctx = verifyctx;
 536 }
 537
 538 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 539                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 540                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 541                                                  unsigned char *out,
 542                                                  size_t *outlen,
 543                                                  const unsigned char *in,
 544                                                  size_t inlen))
 545 {
 546     pmeth->encrypt_init = encrypt_init;
 547     pmeth->encrypt = encryptfn;
 548 }
 549
 550 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 551                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 552                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 553                                                unsigned char *out,
 554                                                size_t *outlen,
 555                                                const unsigned char *in,
 556                                                size_t inlen))
 557 {
 558     pmeth->decrypt_init = decrypt_init;
 559     pmeth->decrypt = decrypt;
 560 }
 561
 562 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 563                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 564                               int (*derive) (EVP_PKEY_CTX *ctx,
 565                                              unsigned char *key,
 566                                              size_t *keylen))
 567 {
 568     pmeth->derive_init = derive_init;
 569     pmeth->derive = derive;
 570 }
 571
 572 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 573                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 574                                          void *p2),
 575                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 576                                              const char *type,
 577                                              const char *value))
 578 {
 579     pmeth->ctrl = ctrl;
 580     pmeth->ctrl_str = ctrl_str;
 581 }
 582
 583 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
 584                             int (**pinit) (EVP_PKEY_CTX *ctx))
 585 {
 586     *pinit = pmeth->init;
 587 }
 588
 589 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
 590                             int (**pcopy) (EVP_PKEY_CTX *dst,
 591                                            EVP_PKEY_CTX *src))
 592 {
 593     *pcopy = pmeth->copy;
 594 }
 595
 596 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
 597                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 598 {
 599     *pcleanup = pmeth->cleanup;
 600 }
 601
 602 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
 603                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 604                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 605                                                    EVP_PKEY *pkey))
 606 {
 607     if (pparamgen_init)
 608         *pparamgen_init = pmeth->paramgen_init;
 609     if (pparamgen)
 610         *pparamgen = pmeth->paramgen;
 611 }
 612
 613 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
 614                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 615                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 616                                                EVP_PKEY *pkey))
 617 {
 618     if (pkeygen_init)
 619         *pkeygen_init = pmeth->keygen_init;
 620     if (pkeygen)
 621         *pkeygen = pmeth->keygen;
 622 }
 623
 624 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
 625                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 626                             int (**psign) (EVP_PKEY_CTX *ctx,
 627                                            unsigned char *sig, size_t *siglen,
 628                                            const unsigned char *tbs,
 629                                            size_t tbslen))
 630 {
 631     if (psign_init)
 632         *psign_init = pmeth->sign_init;
 633     if (psign)
 634         *psign = pmeth->sign;
 635 }
 636
 637 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
 638                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 639                               int (**pverify) (EVP_PKEY_CTX *ctx,
 640                                                const unsigned char *sig,
 641                                                size_t siglen,
 642                                                const unsigned char *tbs,
 643                                                size_t tbslen))
 644 {
 645     if (pverify_init)
 646         *pverify_init = pmeth->verify_init;
 647     if (pverify)
 648         *pverify = pmeth->verify;
 649 }
 650
 651 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
 652                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 653                                                                     *ctx),
 654                                       int (**pverify_recover) (EVP_PKEY_CTX
 655                                                                *ctx,
 656                                                                unsigned char
 657                                                                *sig,
 658                                                                size_t *siglen,
 659                                                                const unsigned
 660                                                                char *tbs,
 661                                                                size_t tbslen))
 662 {
 663     if (pverify_recover_init)
 664         *pverify_recover_init = pmeth->verify_recover_init;
 665     if (pverify_recover)
 666         *pverify_recover = pmeth->verify_recover;
 667 }
 668
 669 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
 670                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 671                                                       EVP_MD_CTX *mctx),
 672                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 673                                                  unsigned char *sig,
 674                                                  size_t *siglen,
 675                                                  EVP_MD_CTX *mctx))
 676 {
 677     if (psignctx_init)
 678         *psignctx_init = pmeth->signctx_init;
 679     if (psignctx)
 680         *psignctx = pmeth->signctx;
 681 }
 682
 683 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
 684                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 685                                                           EVP_MD_CTX *mctx),
 686                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 687                                                      const unsigned char *sig,
 688                                                      int siglen,
 689                                                      EVP_MD_CTX *mctx))
 690 {
 691     if (pverifyctx_init)
 692         *pverifyctx_init = pmeth->verifyctx_init;
 693     if (pverifyctx)
 694         *pverifyctx = pmeth->verifyctx;
 695 }
 696
 697 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
 698                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 699                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 700                                                    unsigned char *out,
 701                                                    size_t *outlen,
 702                                                    const unsigned char *in,
 703                                                    size_t inlen))
 704 {
 705     if (pencrypt_init)
 706         *pencrypt_init = pmeth->encrypt_init;
 707     if (pencryptfn)
 708         *pencryptfn = pmeth->encrypt;
 709 }
 710
 711 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
 712                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 713                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 714                                                  unsigned char *out,
 715                                                  size_t *outlen,
 716                                                  const unsigned char *in,
 717                                                  size_t inlen))
 718 {
 719     if (pdecrypt_init)
 720         *pdecrypt_init = pmeth->decrypt_init;
 721     if (pdecrypt)
 722         *pdecrypt = pmeth->decrypt;
 723 }
 724
 725 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
 726                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 727                               int (**pderive) (EVP_PKEY_CTX *ctx,
 728                                                unsigned char *key,
 729                                                size_t *keylen))
 730 {
 731     if (pderive_init)
 732         *pderive_init = pmeth->derive_init;
 733     if (pderive)
 734         *pderive = pmeth->derive;
 735 }
 736
 737 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
 738                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 739                                            void *p2),
 740                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 741                                                const char *type,
 742                                                const char *value))
 743 {
 744     if (pctrl)
 745         *pctrl = pmeth->ctrl;
 746     if (pctrl_str)
 747         *pctrl_str = pmeth->ctrl_str;
 748 }