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 <openssl/x509v3.h>
  67 #include "internal/asn1_int.h"
  68 #include "internal/evp_int.h"
  69 #include "internal/numbers.h"
  70
  71 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  72
  73 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  74
  75 static const EVP_PKEY_METHOD *standard_methods[] = {
  76 #ifndef OPENSSL_NO_RSA
  77     &rsa_pkey_meth,
  78 #endif
  79 #ifndef OPENSSL_NO_DH
  80     &dh_pkey_meth,
  81 #endif
  82 #ifndef OPENSSL_NO_DSA
  83     &dsa_pkey_meth,
  84 #endif
  85 #ifndef OPENSSL_NO_EC
  86     &ec_pkey_meth,
  87 #endif
  88     &hmac_pkey_meth,
  89     &cmac_pkey_meth,
  90 #ifndef OPENSSL_NO_DH
  91     &dhx_pkey_meth,
  92 #endif
  93     &tls1_prf_pkey_meth
  94 };
  95
  96 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  97                            pmeth);
  98
  99 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
 100                      const EVP_PKEY_METHOD *const *b)
 101 {
 102     return ((*a)->pkey_id - (*b)->pkey_id);
 103 }
 104
 105 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
 106                              pmeth);
 107
 108 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
 109 {
 110     EVP_PKEY_METHOD tmp;
 111     const EVP_PKEY_METHOD *t = &tmp, **ret;
 112     tmp.pkey_id = type;
 113     if (app_pkey_methods) {
 114         int idx;
 115         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
 116         if (idx >= 0)
 117             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 118     }
 119     ret = OBJ_bsearch_pmeth(&t, standard_methods,
 120                             sizeof(standard_methods) /
 121                             sizeof(EVP_PKEY_METHOD *));
 122     if (!ret || !*ret)
 123         return NULL;
 124     return *ret;
 125 }
 126
 127 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
 128 {
 129     EVP_PKEY_CTX *ret;
 130     const EVP_PKEY_METHOD *pmeth;
 131     if (id == -1) {
 132         if (!pkey || !pkey->ameth)
 133             return NULL;
 134         id = pkey->ameth->pkey_id;
 135     }
 136 #ifndef OPENSSL_NO_ENGINE
 137     if (pkey && pkey->engine)
 138         e = pkey->engine;
 139     /* Try to find an ENGINE which implements this method */
 140     if (e) {
 141         if (!ENGINE_init(e)) {
 142             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 143             return NULL;
 144         }
 145     } else
 146         e = ENGINE_get_pkey_meth_engine(id);
 147
 148     /*
 149      * If an ENGINE handled this method look it up. Otherwise use internal
 150      * tables.
 151      */
 152
 153     if (e)
 154         pmeth = ENGINE_get_pkey_meth(e, id);
 155     else
 156 #endif
 157         pmeth = EVP_PKEY_meth_find(id);
 158
 159     if (pmeth == NULL) {
 160         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 161         return NULL;
 162     }
 163
 164     ret = OPENSSL_zalloc(sizeof(*ret));
 165     if (ret == NULL) {
 166 #ifndef OPENSSL_NO_ENGINE
 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     ENGINE_finish(ctx->engine);
 334 #endif
 335     OPENSSL_free(ctx);
 336 }
 337
 338 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 339                       int cmd, int p1, void *p2)
 340 {
 341     int ret;
 342     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 343         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 344         return -2;
 345     }
 346     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 347         return -1;
 348
 349     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 350         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 351         return -1;
 352     }
 353
 354     if ((optype != -1) && !(ctx->operation & optype)) {
 355         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 356         return -1;
 357     }
 358
 359     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 360
 361     if (ret == -2)
 362         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 363
 364     return ret;
 365
 366 }
 367
 368 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 369                           const char *name, const char *value)
 370 {
 371     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 372         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 373         return -2;
 374     }
 375     if (strcmp(name, "digest") == 0) {
 376         const EVP_MD *md;
 377         if (value == NULL || (md = EVP_get_digestbyname(value)) == NULL) {
 378             EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
 379             return 0;
 380         }
 381         return EVP_PKEY_CTX_set_signature_md(ctx, md);
 382     }
 383     return ctx->pmeth->ctrl_str(ctx, name, value);
 384 }
 385
 386 /* Utility functions to send a string of hex string to a ctrl */
 387
 388 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 389 {
 390     size_t len;
 391
 392     len = strlen(str);
 393     if (len > INT_MAX)
 394         return -1;
 395     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 396 }
 397
 398 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 399 {
 400     unsigned char *bin;
 401     long binlen;
 402     int rv = -1;
 403
 404     bin = string_to_hex(hex, &binlen);
 405     if (bin == NULL)
 406         return 0;
 407     if (binlen <= INT_MAX)
 408         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 409     OPENSSL_free(bin);
 410     return rv;
 411 }
 412
 413 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 414 {
 415     return ctx->operation;
 416 }
 417
 418 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 419 {
 420     ctx->keygen_info = dat;
 421     ctx->keygen_info_count = datlen;
 422 }
 423
 424 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 425 {
 426     ctx->data = data;
 427 }
 428
 429 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 430 {
 431     return ctx->data;
 432 }
 433
 434 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 435 {
 436     return ctx->pkey;
 437 }
 438
 439 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 440 {
 441     return ctx->peerkey;
 442 }
 443
 444 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 445 {
 446     ctx->app_data = data;
 447 }
 448
 449 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 450 {
 451     return ctx->app_data;
 452 }
 453
 454 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 455                             int (*init) (EVP_PKEY_CTX *ctx))
 456 {
 457     pmeth->init = init;
 458 }
 459
 460 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 461                             int (*copy) (EVP_PKEY_CTX *dst,
 462                                          EVP_PKEY_CTX *src))
 463 {
 464     pmeth->copy = copy;
 465 }
 466
 467 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 468                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 469 {
 470     pmeth->cleanup = cleanup;
 471 }
 472
 473 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 474                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 475                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 476                                                  EVP_PKEY *pkey))
 477 {
 478     pmeth->paramgen_init = paramgen_init;
 479     pmeth->paramgen = paramgen;
 480 }
 481
 482 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 483                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 484                               int (*keygen) (EVP_PKEY_CTX *ctx,
 485                                              EVP_PKEY *pkey))
 486 {
 487     pmeth->keygen_init = keygen_init;
 488     pmeth->keygen = keygen;
 489 }
 490
 491 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 492                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 493                             int (*sign) (EVP_PKEY_CTX *ctx,
 494                                          unsigned char *sig, size_t *siglen,
 495                                          const unsigned char *tbs,
 496                                          size_t tbslen))
 497 {
 498     pmeth->sign_init = sign_init;
 499     pmeth->sign = sign;
 500 }
 501
 502 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 503                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 504                               int (*verify) (EVP_PKEY_CTX *ctx,
 505                                              const unsigned char *sig,
 506                                              size_t siglen,
 507                                              const unsigned char *tbs,
 508                                              size_t tbslen))
 509 {
 510     pmeth->verify_init = verify_init;
 511     pmeth->verify = verify;
 512 }
 513
 514 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 515                                       int (*verify_recover_init) (EVP_PKEY_CTX
 516                                                                   *ctx),
 517                                       int (*verify_recover) (EVP_PKEY_CTX
 518                                                              *ctx,
 519                                                              unsigned char
 520                                                              *sig,
 521                                                              size_t *siglen,
 522                                                              const unsigned
 523                                                              char *tbs,
 524                                                              size_t tbslen))
 525 {
 526     pmeth->verify_recover_init = verify_recover_init;
 527     pmeth->verify_recover = verify_recover;
 528 }
 529
 530 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 531                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 532                                                     EVP_MD_CTX *mctx),
 533                                int (*signctx) (EVP_PKEY_CTX *ctx,
 534                                                unsigned char *sig,
 535                                                size_t *siglen,
 536                                                EVP_MD_CTX *mctx))
 537 {
 538     pmeth->signctx_init = signctx_init;
 539     pmeth->signctx = signctx;
 540 }
 541
 542 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 543                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 544                                                         EVP_MD_CTX *mctx),
 545                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 546                                                    const unsigned char *sig,
 547                                                    int siglen,
 548                                                    EVP_MD_CTX *mctx))
 549 {
 550     pmeth->verifyctx_init = verifyctx_init;
 551     pmeth->verifyctx = verifyctx;
 552 }
 553
 554 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 555                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 556                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 557                                                  unsigned char *out,
 558                                                  size_t *outlen,
 559                                                  const unsigned char *in,
 560                                                  size_t inlen))
 561 {
 562     pmeth->encrypt_init = encrypt_init;
 563     pmeth->encrypt = encryptfn;
 564 }
 565
 566 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 567                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 568                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 569                                                unsigned char *out,
 570                                                size_t *outlen,
 571                                                const unsigned char *in,
 572                                                size_t inlen))
 573 {
 574     pmeth->decrypt_init = decrypt_init;
 575     pmeth->decrypt = decrypt;
 576 }
 577
 578 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 579                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 580                               int (*derive) (EVP_PKEY_CTX *ctx,
 581                                              unsigned char *key,
 582                                              size_t *keylen))
 583 {
 584     pmeth->derive_init = derive_init;
 585     pmeth->derive = derive;
 586 }
 587
 588 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 589                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 590                                          void *p2),
 591                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 592                                              const char *type,
 593                                              const char *value))
 594 {
 595     pmeth->ctrl = ctrl;
 596     pmeth->ctrl_str = ctrl_str;
 597 }
 598
 599 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
 600                             int (**pinit) (EVP_PKEY_CTX *ctx))
 601 {
 602     *pinit = pmeth->init;
 603 }
 604
 605 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
 606                             int (**pcopy) (EVP_PKEY_CTX *dst,
 607                                            EVP_PKEY_CTX *src))
 608 {
 609     *pcopy = pmeth->copy;
 610 }
 611
 612 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
 613                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 614 {
 615     *pcleanup = pmeth->cleanup;
 616 }
 617
 618 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
 619                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 620                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 621                                                    EVP_PKEY *pkey))
 622 {
 623     if (pparamgen_init)
 624         *pparamgen_init = pmeth->paramgen_init;
 625     if (pparamgen)
 626         *pparamgen = pmeth->paramgen;
 627 }
 628
 629 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
 630                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 631                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 632                                                EVP_PKEY *pkey))
 633 {
 634     if (pkeygen_init)
 635         *pkeygen_init = pmeth->keygen_init;
 636     if (pkeygen)
 637         *pkeygen = pmeth->keygen;
 638 }
 639
 640 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
 641                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 642                             int (**psign) (EVP_PKEY_CTX *ctx,
 643                                            unsigned char *sig, size_t *siglen,
 644                                            const unsigned char *tbs,
 645                                            size_t tbslen))
 646 {
 647     if (psign_init)
 648         *psign_init = pmeth->sign_init;
 649     if (psign)
 650         *psign = pmeth->sign;
 651 }
 652
 653 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
 654                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 655                               int (**pverify) (EVP_PKEY_CTX *ctx,
 656                                                const unsigned char *sig,
 657                                                size_t siglen,
 658                                                const unsigned char *tbs,
 659                                                size_t tbslen))
 660 {
 661     if (pverify_init)
 662         *pverify_init = pmeth->verify_init;
 663     if (pverify)
 664         *pverify = pmeth->verify;
 665 }
 666
 667 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
 668                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 669                                                                     *ctx),
 670                                       int (**pverify_recover) (EVP_PKEY_CTX
 671                                                                *ctx,
 672                                                                unsigned char
 673                                                                *sig,
 674                                                                size_t *siglen,
 675                                                                const unsigned
 676                                                                char *tbs,
 677                                                                size_t tbslen))
 678 {
 679     if (pverify_recover_init)
 680         *pverify_recover_init = pmeth->verify_recover_init;
 681     if (pverify_recover)
 682         *pverify_recover = pmeth->verify_recover;
 683 }
 684
 685 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
 686                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 687                                                       EVP_MD_CTX *mctx),
 688                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 689                                                  unsigned char *sig,
 690                                                  size_t *siglen,
 691                                                  EVP_MD_CTX *mctx))
 692 {
 693     if (psignctx_init)
 694         *psignctx_init = pmeth->signctx_init;
 695     if (psignctx)
 696         *psignctx = pmeth->signctx;
 697 }
 698
 699 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
 700                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 701                                                           EVP_MD_CTX *mctx),
 702                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 703                                                      const unsigned char *sig,
 704                                                      int siglen,
 705                                                      EVP_MD_CTX *mctx))
 706 {
 707     if (pverifyctx_init)
 708         *pverifyctx_init = pmeth->verifyctx_init;
 709     if (pverifyctx)
 710         *pverifyctx = pmeth->verifyctx;
 711 }
 712
 713 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
 714                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 715                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 716                                                    unsigned char *out,
 717                                                    size_t *outlen,
 718                                                    const unsigned char *in,
 719                                                    size_t inlen))
 720 {
 721     if (pencrypt_init)
 722         *pencrypt_init = pmeth->encrypt_init;
 723     if (pencryptfn)
 724         *pencryptfn = pmeth->encrypt;
 725 }
 726
 727 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
 728                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 729                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 730                                                  unsigned char *out,
 731                                                  size_t *outlen,
 732                                                  const unsigned char *in,
 733                                                  size_t inlen))
 734 {
 735     if (pdecrypt_init)
 736         *pdecrypt_init = pmeth->decrypt_init;
 737     if (pdecrypt)
 738         *pdecrypt = pmeth->decrypt;
 739 }
 740
 741 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
 742                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 743                               int (**pderive) (EVP_PKEY_CTX *ctx,
 744                                                unsigned char *key,
 745                                                size_t *keylen))
 746 {
 747     if (pderive_init)
 748         *pderive_init = pmeth->derive_init;
 749     if (pderive)
 750         *pderive = pmeth->derive;
 751 }
 752
 753 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
 754                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 755                                            void *p2),
 756                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 757                                                const char *type,
 758                                                const char *value))
 759 {
 760     if (pctrl)
 761         *pctrl = pmeth->ctrl;
 762     if (pctrl_str)
 763         *pctrl_str = pmeth->ctrl_str;
 764 }