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     &hkdf_pkey_meth
  95 };
  96
  97 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  98                            pmeth);
  99
 100 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
 101                      const EVP_PKEY_METHOD *const *b)
 102 {
 103     return ((*a)->pkey_id - (*b)->pkey_id);
 104 }
 105
 106 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
 107                              pmeth);
 108
 109 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
 110 {
 111     EVP_PKEY_METHOD tmp;
 112     const EVP_PKEY_METHOD *t = &tmp, **ret;
 113     tmp.pkey_id = type;
 114     if (app_pkey_methods) {
 115         int idx;
 116         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
 117         if (idx >= 0)
 118             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 119     }
 120     ret = OBJ_bsearch_pmeth(&t, standard_methods,
 121                             sizeof(standard_methods) /
 122                             sizeof(EVP_PKEY_METHOD *));
 123     if (!ret || !*ret)
 124         return NULL;
 125     return *ret;
 126 }
 127
 128 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
 129 {
 130     EVP_PKEY_CTX *ret;
 131     const EVP_PKEY_METHOD *pmeth;
 132     if (id == -1) {
 133         if (!pkey || !pkey->ameth)
 134             return NULL;
 135         id = pkey->ameth->pkey_id;
 136     }
 137 #ifndef OPENSSL_NO_ENGINE
 138     if (pkey && pkey->engine)
 139         e = pkey->engine;
 140     /* Try to find an ENGINE which implements this method */
 141     if (e) {
 142         if (!ENGINE_init(e)) {
 143             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 144             return NULL;
 145         }
 146     } else
 147         e = ENGINE_get_pkey_meth_engine(id);
 148
 149     /*
 150      * If an ENGINE handled this method look it up. Otherwise use internal
 151      * tables.
 152      */
 153
 154     if (e)
 155         pmeth = ENGINE_get_pkey_meth(e, id);
 156     else
 157 #endif
 158         pmeth = EVP_PKEY_meth_find(id);
 159
 160     if (pmeth == NULL) {
 161         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 162         return NULL;
 163     }
 164
 165     ret = OPENSSL_zalloc(sizeof(*ret));
 166     if (ret == NULL) {
 167 #ifndef OPENSSL_NO_ENGINE
 168         ENGINE_finish(e);
 169 #endif
 170         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 171         return NULL;
 172     }
 173     ret->engine = e;
 174     ret->pmeth = pmeth;
 175     ret->operation = EVP_PKEY_OP_UNDEFINED;
 176     ret->pkey = pkey;
 177     if (pkey)
 178         EVP_PKEY_up_ref(pkey);
 179
 180     if (pmeth->init) {
 181         if (pmeth->init(ret) <= 0) {
 182             EVP_PKEY_CTX_free(ret);
 183             return NULL;
 184         }
 185     }
 186
 187     return ret;
 188 }
 189
 190 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 191 {
 192     EVP_PKEY_METHOD *pmeth;
 193
 194     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 195     if (pmeth == NULL)
 196         return NULL;
 197
 198     pmeth->pkey_id = id;
 199     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 200     return pmeth;
 201 }
 202
 203 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 204                              const EVP_PKEY_METHOD *meth)
 205 {
 206     if (ppkey_id)
 207         *ppkey_id = meth->pkey_id;
 208     if (pflags)
 209         *pflags = meth->flags;
 210 }
 211
 212 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 213 {
 214
 215     dst->init = src->init;
 216     dst->copy = src->copy;
 217     dst->cleanup = src->cleanup;
 218
 219     dst->paramgen_init = src->paramgen_init;
 220     dst->paramgen = src->paramgen;
 221
 222     dst->keygen_init = src->keygen_init;
 223     dst->keygen = src->keygen;
 224
 225     dst->sign_init = src->sign_init;
 226     dst->sign = src->sign;
 227
 228     dst->verify_init = src->verify_init;
 229     dst->verify = src->verify;
 230
 231     dst->verify_recover_init = src->verify_recover_init;
 232     dst->verify_recover = src->verify_recover;
 233
 234     dst->signctx_init = src->signctx_init;
 235     dst->signctx = src->signctx;
 236
 237     dst->verifyctx_init = src->verifyctx_init;
 238     dst->verifyctx = src->verifyctx;
 239
 240     dst->encrypt_init = src->encrypt_init;
 241     dst->encrypt = src->encrypt;
 242
 243     dst->decrypt_init = src->decrypt_init;
 244     dst->decrypt = src->decrypt;
 245
 246     dst->derive_init = src->derive_init;
 247     dst->derive = src->derive;
 248
 249     dst->ctrl = src->ctrl;
 250     dst->ctrl_str = src->ctrl_str;
 251 }
 252
 253 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 254 {
 255     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 256         OPENSSL_free(pmeth);
 257 }
 258
 259 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 260 {
 261     return int_ctx_new(pkey, e, -1);
 262 }
 263
 264 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 265 {
 266     return int_ctx_new(NULL, e, id);
 267 }
 268
 269 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 270 {
 271     EVP_PKEY_CTX *rctx;
 272     if (!pctx->pmeth || !pctx->pmeth->copy)
 273         return NULL;
 274 #ifndef OPENSSL_NO_ENGINE
 275     /* Make sure it's safe to copy a pkey context using an ENGINE */
 276     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 277         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 278         return 0;
 279     }
 280 #endif
 281     rctx = OPENSSL_malloc(sizeof(*rctx));
 282     if (rctx == NULL)
 283         return NULL;
 284
 285     rctx->pmeth = pctx->pmeth;
 286 #ifndef OPENSSL_NO_ENGINE
 287     rctx->engine = pctx->engine;
 288 #endif
 289
 290     if (pctx->pkey)
 291         EVP_PKEY_up_ref(pctx->pkey);
 292
 293     rctx->pkey = pctx->pkey;
 294
 295     if (pctx->peerkey)
 296         EVP_PKEY_up_ref(pctx->peerkey);
 297
 298     rctx->peerkey = pctx->peerkey;
 299
 300     rctx->data = NULL;
 301     rctx->app_data = NULL;
 302     rctx->operation = pctx->operation;
 303
 304     if (pctx->pmeth->copy(rctx, pctx) > 0)
 305         return rctx;
 306
 307     EVP_PKEY_CTX_free(rctx);
 308     return NULL;
 309
 310 }
 311
 312 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 313 {
 314     if (app_pkey_methods == NULL) {
 315         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 316         if (app_pkey_methods == NULL)
 317             return 0;
 318     }
 319     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
 320         return 0;
 321     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 322     return 1;
 323 }
 324
 325 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 326 {
 327     if (ctx == NULL)
 328         return;
 329     if (ctx->pmeth && ctx->pmeth->cleanup)
 330         ctx->pmeth->cleanup(ctx);
 331     EVP_PKEY_free(ctx->pkey);
 332     EVP_PKEY_free(ctx->peerkey);
 333 #ifndef OPENSSL_NO_ENGINE
 334     ENGINE_finish(ctx->engine);
 335 #endif
 336     OPENSSL_free(ctx);
 337 }
 338
 339 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 340                       int cmd, int p1, void *p2)
 341 {
 342     int ret;
 343     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 344         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 345         return -2;
 346     }
 347     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 348         return -1;
 349
 350     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 351         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 352         return -1;
 353     }
 354
 355     if ((optype != -1) && !(ctx->operation & optype)) {
 356         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 357         return -1;
 358     }
 359
 360     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 361
 362     if (ret == -2)
 363         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 364
 365     return ret;
 366
 367 }
 368
 369 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 370                           const char *name, const char *value)
 371 {
 372     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 373         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 374         return -2;
 375     }
 376     if (strcmp(name, "digest") == 0) {
 377         const EVP_MD *md;
 378         if (value == NULL || (md = EVP_get_digestbyname(value)) == NULL) {
 379             EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
 380             return 0;
 381         }
 382         return EVP_PKEY_CTX_set_signature_md(ctx, md);
 383     }
 384     return ctx->pmeth->ctrl_str(ctx, name, value);
 385 }
 386
 387 /* Utility functions to send a string of hex string to a ctrl */
 388
 389 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 390 {
 391     size_t len;
 392
 393     len = strlen(str);
 394     if (len > INT_MAX)
 395         return -1;
 396     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 397 }
 398
 399 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 400 {
 401     unsigned char *bin;
 402     long binlen;
 403     int rv = -1;
 404
 405     bin = string_to_hex(hex, &binlen);
 406     if (bin == NULL)
 407         return 0;
 408     if (binlen <= INT_MAX)
 409         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 410     OPENSSL_free(bin);
 411     return rv;
 412 }
 413
 414 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 415 {
 416     return ctx->operation;
 417 }
 418
 419 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 420 {
 421     ctx->keygen_info = dat;
 422     ctx->keygen_info_count = datlen;
 423 }
 424
 425 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 426 {
 427     ctx->data = data;
 428 }
 429
 430 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 431 {
 432     return ctx->data;
 433 }
 434
 435 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 436 {
 437     return ctx->pkey;
 438 }
 439
 440 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 441 {
 442     return ctx->peerkey;
 443 }
 444
 445 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 446 {
 447     ctx->app_data = data;
 448 }
 449
 450 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 451 {
 452     return ctx->app_data;
 453 }
 454
 455 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 456                             int (*init) (EVP_PKEY_CTX *ctx))
 457 {
 458     pmeth->init = init;
 459 }
 460
 461 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 462                             int (*copy) (EVP_PKEY_CTX *dst,
 463                                          EVP_PKEY_CTX *src))
 464 {
 465     pmeth->copy = copy;
 466 }
 467
 468 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 469                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 470 {
 471     pmeth->cleanup = cleanup;
 472 }
 473
 474 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 475                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 476                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 477                                                  EVP_PKEY *pkey))
 478 {
 479     pmeth->paramgen_init = paramgen_init;
 480     pmeth->paramgen = paramgen;
 481 }
 482
 483 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 484                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 485                               int (*keygen) (EVP_PKEY_CTX *ctx,
 486                                              EVP_PKEY *pkey))
 487 {
 488     pmeth->keygen_init = keygen_init;
 489     pmeth->keygen = keygen;
 490 }
 491
 492 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 493                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 494                             int (*sign) (EVP_PKEY_CTX *ctx,
 495                                          unsigned char *sig, size_t *siglen,
 496                                          const unsigned char *tbs,
 497                                          size_t tbslen))
 498 {
 499     pmeth->sign_init = sign_init;
 500     pmeth->sign = sign;
 501 }
 502
 503 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 504                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 505                               int (*verify) (EVP_PKEY_CTX *ctx,
 506                                              const unsigned char *sig,
 507                                              size_t siglen,
 508                                              const unsigned char *tbs,
 509                                              size_t tbslen))
 510 {
 511     pmeth->verify_init = verify_init;
 512     pmeth->verify = verify;
 513 }
 514
 515 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 516                                       int (*verify_recover_init) (EVP_PKEY_CTX
 517                                                                   *ctx),
 518                                       int (*verify_recover) (EVP_PKEY_CTX
 519                                                              *ctx,
 520                                                              unsigned char
 521                                                              *sig,
 522                                                              size_t *siglen,
 523                                                              const unsigned
 524                                                              char *tbs,
 525                                                              size_t tbslen))
 526 {
 527     pmeth->verify_recover_init = verify_recover_init;
 528     pmeth->verify_recover = verify_recover;
 529 }
 530
 531 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 532                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 533                                                     EVP_MD_CTX *mctx),
 534                                int (*signctx) (EVP_PKEY_CTX *ctx,
 535                                                unsigned char *sig,
 536                                                size_t *siglen,
 537                                                EVP_MD_CTX *mctx))
 538 {
 539     pmeth->signctx_init = signctx_init;
 540     pmeth->signctx = signctx;
 541 }
 542
 543 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 544                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 545                                                         EVP_MD_CTX *mctx),
 546                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 547                                                    const unsigned char *sig,
 548                                                    int siglen,
 549                                                    EVP_MD_CTX *mctx))
 550 {
 551     pmeth->verifyctx_init = verifyctx_init;
 552     pmeth->verifyctx = verifyctx;
 553 }
 554
 555 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 556                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 557                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 558                                                  unsigned char *out,
 559                                                  size_t *outlen,
 560                                                  const unsigned char *in,
 561                                                  size_t inlen))
 562 {
 563     pmeth->encrypt_init = encrypt_init;
 564     pmeth->encrypt = encryptfn;
 565 }
 566
 567 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 568                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 569                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 570                                                unsigned char *out,
 571                                                size_t *outlen,
 572                                                const unsigned char *in,
 573                                                size_t inlen))
 574 {
 575     pmeth->decrypt_init = decrypt_init;
 576     pmeth->decrypt = decrypt;
 577 }
 578
 579 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 580                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 581                               int (*derive) (EVP_PKEY_CTX *ctx,
 582                                              unsigned char *key,
 583                                              size_t *keylen))
 584 {
 585     pmeth->derive_init = derive_init;
 586     pmeth->derive = derive;
 587 }
 588
 589 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 590                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 591                                          void *p2),
 592                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 593                                              const char *type,
 594                                              const char *value))
 595 {
 596     pmeth->ctrl = ctrl;
 597     pmeth->ctrl_str = ctrl_str;
 598 }
 599
 600 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
 601                             int (**pinit) (EVP_PKEY_CTX *ctx))
 602 {
 603     *pinit = pmeth->init;
 604 }
 605
 606 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
 607                             int (**pcopy) (EVP_PKEY_CTX *dst,
 608                                            EVP_PKEY_CTX *src))
 609 {
 610     *pcopy = pmeth->copy;
 611 }
 612
 613 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
 614                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 615 {
 616     *pcleanup = pmeth->cleanup;
 617 }
 618
 619 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
 620                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 621                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 622                                                    EVP_PKEY *pkey))
 623 {
 624     if (pparamgen_init)
 625         *pparamgen_init = pmeth->paramgen_init;
 626     if (pparamgen)
 627         *pparamgen = pmeth->paramgen;
 628 }
 629
 630 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
 631                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 632                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 633                                                EVP_PKEY *pkey))
 634 {
 635     if (pkeygen_init)
 636         *pkeygen_init = pmeth->keygen_init;
 637     if (pkeygen)
 638         *pkeygen = pmeth->keygen;
 639 }
 640
 641 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
 642                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 643                             int (**psign) (EVP_PKEY_CTX *ctx,
 644                                            unsigned char *sig, size_t *siglen,
 645                                            const unsigned char *tbs,
 646                                            size_t tbslen))
 647 {
 648     if (psign_init)
 649         *psign_init = pmeth->sign_init;
 650     if (psign)
 651         *psign = pmeth->sign;
 652 }
 653
 654 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
 655                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 656                               int (**pverify) (EVP_PKEY_CTX *ctx,
 657                                                const unsigned char *sig,
 658                                                size_t siglen,
 659                                                const unsigned char *tbs,
 660                                                size_t tbslen))
 661 {
 662     if (pverify_init)
 663         *pverify_init = pmeth->verify_init;
 664     if (pverify)
 665         *pverify = pmeth->verify;
 666 }
 667
 668 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
 669                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 670                                                                     *ctx),
 671                                       int (**pverify_recover) (EVP_PKEY_CTX
 672                                                                *ctx,
 673                                                                unsigned char
 674                                                                *sig,
 675                                                                size_t *siglen,
 676                                                                const unsigned
 677                                                                char *tbs,
 678                                                                size_t tbslen))
 679 {
 680     if (pverify_recover_init)
 681         *pverify_recover_init = pmeth->verify_recover_init;
 682     if (pverify_recover)
 683         *pverify_recover = pmeth->verify_recover;
 684 }
 685
 686 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
 687                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 688                                                       EVP_MD_CTX *mctx),
 689                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 690                                                  unsigned char *sig,
 691                                                  size_t *siglen,
 692                                                  EVP_MD_CTX *mctx))
 693 {
 694     if (psignctx_init)
 695         *psignctx_init = pmeth->signctx_init;
 696     if (psignctx)
 697         *psignctx = pmeth->signctx;
 698 }
 699
 700 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
 701                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 702                                                           EVP_MD_CTX *mctx),
 703                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 704                                                      const unsigned char *sig,
 705                                                      int siglen,
 706                                                      EVP_MD_CTX *mctx))
 707 {
 708     if (pverifyctx_init)
 709         *pverifyctx_init = pmeth->verifyctx_init;
 710     if (pverifyctx)
 711         *pverifyctx = pmeth->verifyctx;
 712 }
 713
 714 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
 715                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 716                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 717                                                    unsigned char *out,
 718                                                    size_t *outlen,
 719                                                    const unsigned char *in,
 720                                                    size_t inlen))
 721 {
 722     if (pencrypt_init)
 723         *pencrypt_init = pmeth->encrypt_init;
 724     if (pencryptfn)
 725         *pencryptfn = pmeth->encrypt;
 726 }
 727
 728 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
 729                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 730                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 731                                                  unsigned char *out,
 732                                                  size_t *outlen,
 733                                                  const unsigned char *in,
 734                                                  size_t inlen))
 735 {
 736     if (pdecrypt_init)
 737         *pdecrypt_init = pmeth->decrypt_init;
 738     if (pdecrypt)
 739         *pdecrypt = pmeth->decrypt;
 740 }
 741
 742 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
 743                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 744                               int (**pderive) (EVP_PKEY_CTX *ctx,
 745                                                unsigned char *key,
 746                                                size_t *keylen))
 747 {
 748     if (pderive_init)
 749         *pderive_init = pmeth->derive_init;
 750     if (pderive)
 751         *pderive = pmeth->derive;
 752 }
 753
 754 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
 755                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 756                                            void *p2),
 757                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 758                                                const char *type,
 759                                                const char *value))
 760 {
 761     if (pctrl)
 762         *pctrl = pmeth->ctrl;
 763     if (pctrl_str)
 764         *pctrl_str = pmeth->ctrl_str;
 765 }