release/src/router/openssl/crypto/evp/pmeth_lib.c

   1 /* pmeth_lib.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 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 "cryptlib.h"
  62 #include <openssl/objects.h>
  63 #include <openssl/evp.h>
  64 #ifndef OPENSSL_NO_ENGINE
  65 #include <openssl/engine.h>
  66 #endif
  67 #include "asn1_locl.h"
  68 #include "evp_locl.h"
  69
  70 typedef int sk_cmp_fn_type(const char * const *a, const char * const *b);
  71
  72 DECLARE_STACK_OF(EVP_PKEY_METHOD)
  73 STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  74
  75 extern const EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth;
  76 extern const EVP_PKEY_METHOD ec_pkey_meth, hmac_pkey_meth, cmac_pkey_meth;
  77
  78 static const EVP_PKEY_METHOD *standard_methods[] =
  79         {
  80 #ifndef OPENSSL_NO_RSA
  81         &rsa_pkey_meth,
  82 #endif
  83 #ifndef OPENSSL_NO_DH
  84         &dh_pkey_meth,
  85 #endif
  86 #ifndef OPENSSL_NO_DSA
  87         &dsa_pkey_meth,
  88 #endif
  89 #ifndef OPENSSL_NO_EC
  90         &ec_pkey_meth,
  91 #endif
  92         &hmac_pkey_meth,
  93         &cmac_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                 {
 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)/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                 {
 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                 {
 143                 if (!ENGINE_init(e))
 144                         {
 145                         EVPerr(EVP_F_INT_CTX_NEW,ERR_R_ENGINE_LIB);
 146                         return NULL;
 147                         }
 148                 }
 149         else
 150                 e = ENGINE_get_pkey_meth_engine(id);
 151
 152         /* If an ENGINE handled this method look it up. Othewise
 153          * use internal tables.
 154          */
 155
 156         if (e)
 157                 pmeth = ENGINE_get_pkey_meth(e, id);
 158         else
 159 #endif
 160                 pmeth = EVP_PKEY_meth_find(id);
 161
 162         if (pmeth == NULL)
 163                 {
 164                 EVPerr(EVP_F_INT_CTX_NEW,EVP_R_UNSUPPORTED_ALGORITHM);
 165                 return NULL;
 166                 }
 167
 168         ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
 169         if (!ret)
 170                 {
 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         ret->peerkey = NULL;
 183         ret->pkey_gencb = 0;
 184         if (pkey)
 185                 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 186         ret->data = NULL;
 187
 188         if (pmeth->init)
 189                 {
 190                 if (pmeth->init(ret) <= 0)
 191                         {
 192                         EVP_PKEY_CTX_free(ret);
 193                         return NULL;
 194                         }
 195                 }
 196
 197         return ret;
 198         }
 199
 200 EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags)
 201         {
 202         EVP_PKEY_METHOD *pmeth;
 203         pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
 204         if (!pmeth)
 205                 return NULL;
 206
 207         memset(pmeth, 0, sizeof(EVP_PKEY_METHOD));
 208
 209         pmeth->pkey_id = id;
 210         pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 211
 212         pmeth->init = 0;
 213         pmeth->copy = 0;
 214         pmeth->cleanup = 0;
 215         pmeth->paramgen_init = 0;
 216         pmeth->paramgen = 0;
 217         pmeth->keygen_init = 0;
 218         pmeth->keygen = 0;
 219         pmeth->sign_init = 0;
 220         pmeth->sign = 0;
 221         pmeth->verify_init = 0;
 222         pmeth->verify = 0;
 223         pmeth->verify_recover_init = 0;
 224         pmeth->verify_recover = 0;
 225         pmeth->signctx_init = 0;
 226         pmeth->signctx = 0;
 227         pmeth->verifyctx_init = 0;
 228         pmeth->verifyctx = 0;
 229         pmeth->encrypt_init = 0;
 230         pmeth->encrypt = 0;
 231         pmeth->decrypt_init = 0;
 232         pmeth->decrypt = 0;
 233         pmeth->derive_init = 0;
 234         pmeth->derive = 0;
 235         pmeth->ctrl = 0;
 236         pmeth->ctrl_str = 0;
 237
 238         return pmeth;
 239         }
 240
 241 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 242                                 const EVP_PKEY_METHOD *meth)
 243         {
 244         if (ppkey_id)
 245                 *ppkey_id = meth->pkey_id;
 246         if (pflags)
 247                 *pflags = meth->flags;
 248         }
 249
 250 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 251         {
 252
 253         dst->init = src->init;
 254         dst->copy = src->copy;
 255         dst->cleanup = src->cleanup;
 256
 257         dst->paramgen_init = src->paramgen_init;
 258         dst->paramgen = src->paramgen;
 259
 260         dst->keygen_init = src->keygen_init;
 261         dst->keygen = src->keygen;
 262
 263         dst->sign_init = src->sign_init;
 264         dst->sign = src->sign;
 265
 266         dst->verify_init = src->verify_init;
 267         dst->verify = src->verify;
 268
 269         dst->verify_recover_init = src->verify_recover_init;
 270         dst->verify_recover = src->verify_recover;
 271
 272         dst->signctx_init = src->signctx_init;
 273         dst->signctx = src->signctx;
 274
 275         dst->verifyctx_init = src->verifyctx_init;
 276         dst->verifyctx = src->verifyctx;
 277
 278         dst->encrypt_init = src->encrypt_init;
 279         dst->encrypt = src->encrypt;
 280
 281         dst->decrypt_init = src->decrypt_init;
 282         dst->decrypt = src->decrypt;
 283
 284         dst->derive_init = src->derive_init;
 285         dst->derive = src->derive;
 286
 287         dst->ctrl = src->ctrl;
 288         dst->ctrl_str = src->ctrl_str;
 289         }
 290
 291 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 292         {
 293         if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 294                 OPENSSL_free(pmeth);
 295         }
 296
 297 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 298         {
 299         return int_ctx_new(pkey, e, -1);
 300         }
 301
 302 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 303         {
 304         return int_ctx_new(NULL, e, id);
 305         }
 306
 307 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 308         {
 309         EVP_PKEY_CTX *rctx;
 310         if (!pctx->pmeth || !pctx->pmeth->copy)
 311                 return NULL;
 312 #ifndef OPENSSL_NO_ENGINE
 313         /* Make sure it's safe to copy a pkey context using an ENGINE */
 314         if (pctx->engine && !ENGINE_init(pctx->engine))
 315                 {
 316                 EVPerr(EVP_F_EVP_PKEY_CTX_DUP,ERR_R_ENGINE_LIB);
 317                 return 0;
 318                 }
 319 #endif
 320         rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
 321         if (!rctx)
 322                 return NULL;
 323
 324         rctx->pmeth = pctx->pmeth;
 325 #ifndef OPENSSL_NO_ENGINE
 326         rctx->engine = pctx->engine;
 327 #endif
 328
 329         if (pctx->pkey)
 330                 CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 331
 332         rctx->pkey = pctx->pkey;
 333
 334         if (pctx->peerkey)
 335                 CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 336
 337         rctx->peerkey = pctx->peerkey;
 338
 339         rctx->data = NULL;
 340         rctx->app_data = NULL;
 341         rctx->operation = pctx->operation;
 342
 343         if (pctx->pmeth->copy(rctx, pctx) > 0)
 344                 return rctx;
 345
 346         EVP_PKEY_CTX_free(rctx);
 347         return NULL;
 348
 349         }
 350
 351 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 352         {
 353         if (app_pkey_methods == NULL)
 354                 {
 355                 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 356                 if (!app_pkey_methods)
 357                         return 0;
 358                 }
 359         if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
 360                 return 0;
 361         sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 362         return 1;
 363         }
 364
 365 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 366         {
 367         if (ctx == NULL)
 368                 return;
 369         if (ctx->pmeth && ctx->pmeth->cleanup)
 370                 ctx->pmeth->cleanup(ctx);
 371         if (ctx->pkey)
 372                 EVP_PKEY_free(ctx->pkey);
 373         if (ctx->peerkey)
 374                 EVP_PKEY_free(ctx->peerkey);
 375 #ifndef OPENSSL_NO_ENGINE
 376         if(ctx->engine)
 377                 /* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
 378                  * functional reference we held for this reason. */
 379                 ENGINE_finish(ctx->engine);
 380 #endif
 381         OPENSSL_free(ctx);
 382         }
 383
 384 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 385                                 int cmd, int p1, void *p2)
 386         {
 387         int ret;
 388         if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl)
 389                 {
 390                 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 391                 return -2;
 392                 }
 393         if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 394                 return -1;
 395
 396         if (ctx->operation == EVP_PKEY_OP_UNDEFINED)
 397                 {
 398                 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 399                 return -1;
 400                 }
 401
 402         if ((optype != -1) && !(ctx->operation & optype))
 403                 {
 404                 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 405                 return -1;
 406                 }
 407
 408         ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 409
 410         if (ret == -2)
 411                 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 412
 413         return ret;
 414
 415         }
 416
 417 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 418                                         const char *name, const char *value)
 419         {
 420         if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str)
 421                 {
 422                 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
 423                                                 EVP_R_COMMAND_NOT_SUPPORTED);
 424                 return -2;
 425                 }
 426         if (!strcmp(name, "digest"))
 427                 {
 428                 const EVP_MD *md;
 429                 if (!value || !(md = EVP_get_digestbyname(value)))
 430                         {
 431                         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
 432                                                 EVP_R_INVALID_DIGEST);
 433                         return 0;
 434                         }
 435                 return EVP_PKEY_CTX_set_signature_md(ctx, md);
 436                 }
 437         return ctx->pmeth->ctrl_str(ctx, name, value);
 438         }
 439
 440 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 441         {
 442         return ctx->operation;
 443         }
 444
 445 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 446         {
 447         ctx->keygen_info = dat;
 448         ctx->keygen_info_count = datlen;
 449         }
 450
 451 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 452         {
 453         ctx->data = data;
 454         }
 455
 456 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 457         {
 458         return ctx->data;
 459         }
 460
 461 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 462         {
 463         return ctx->pkey;
 464         }
 465
 466 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 467         {
 468         return ctx->peerkey;
 469         }
 470
 471 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 472         {
 473         ctx->app_data = data;
 474         }
 475
 476 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 477         {
 478         return ctx->app_data;
 479         }
 480
 481 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 482         int (*init)(EVP_PKEY_CTX *ctx))
 483         {
 484         pmeth->init = init;
 485         }
 486
 487 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 488         int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
 489         {
 490         pmeth->copy = copy;
 491         }
 492
 493 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 494         void (*cleanup)(EVP_PKEY_CTX *ctx))
 495         {
 496         pmeth->cleanup = cleanup;
 497         }
 498
 499 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 500         int (*paramgen_init)(EVP_PKEY_CTX *ctx),
 501         int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
 502         {
 503         pmeth->paramgen_init = paramgen_init;
 504         pmeth->paramgen = paramgen;
 505         }
 506
 507 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 508         int (*keygen_init)(EVP_PKEY_CTX *ctx),
 509         int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
 510         {
 511         pmeth->keygen_init = keygen_init;
 512         pmeth->keygen = keygen;
 513         }
 514
 515 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 516         int (*sign_init)(EVP_PKEY_CTX *ctx),
 517         int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 518                                         const unsigned char *tbs, size_t tbslen))
 519         {
 520         pmeth->sign_init = sign_init;
 521         pmeth->sign = sign;
 522         }
 523
 524 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 525         int (*verify_init)(EVP_PKEY_CTX *ctx),
 526         int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
 527                                         const unsigned char *tbs, size_t tbslen))
 528         {
 529         pmeth->verify_init = verify_init;
 530         pmeth->verify = verify;
 531         }
 532
 533 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 534         int (*verify_recover_init)(EVP_PKEY_CTX *ctx),
 535         int (*verify_recover)(EVP_PKEY_CTX *ctx,
 536                                         unsigned char *sig, size_t *siglen,
 537                                         const unsigned char *tbs, size_t tbslen))
 538         {
 539         pmeth->verify_recover_init = verify_recover_init;
 540         pmeth->verify_recover = verify_recover;
 541         }
 542
 543 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 544         int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
 545         int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 546                                         EVP_MD_CTX *mctx))
 547         {
 548         pmeth->signctx_init = signctx_init;
 549         pmeth->signctx = signctx;
 550         }
 551
 552 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 553         int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
 554         int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
 555                                         EVP_MD_CTX *mctx))
 556         {
 557         pmeth->verifyctx_init = verifyctx_init;
 558         pmeth->verifyctx = verifyctx;
 559         }
 560
 561 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 562         int (*encrypt_init)(EVP_PKEY_CTX *ctx),
 563         int (*encryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 564                                         const unsigned char *in, size_t inlen))
 565         {
 566         pmeth->encrypt_init = encrypt_init;
 567         pmeth->encrypt = encryptfn;
 568         }
 569
 570 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 571         int (*decrypt_init)(EVP_PKEY_CTX *ctx),
 572         int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 573                                         const unsigned char *in, 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, unsigned char *key, size_t *keylen))
 582         {
 583         pmeth->derive_init = derive_init;
 584         pmeth->derive = derive;
 585         }
 586
 587 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 588         int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
 589         int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
 590         {
 591         pmeth->ctrl = ctrl;
 592         pmeth->ctrl_str = ctrl_str;
 593         }