lib/libcrypto/evp/pmeth_lib.c

   1 /* $OpenBSD: pmeth_lib.c,v 1.14 2018/04/14 07:09:21 tb Exp $ */
   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 <string.h>
  62
  63 #include <openssl/opensslconf.h>
  64
  65 #include <openssl/err.h>
  66 #include <openssl/evp.h>
  67 #include <openssl/objects.h>
  68
  69 #ifndef OPENSSL_NO_ENGINE
  70 #include <openssl/engine.h>
  71 #endif
  72
  73 #include "asn1_locl.h"
  74 #include "evp_locl.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 STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  80
  81 extern const EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth;
  82 extern const EVP_PKEY_METHOD ec_pkey_meth, hmac_pkey_meth, cmac_pkey_meth;
  83 extern const EVP_PKEY_METHOD gostimit_pkey_meth, gostr01_pkey_meth;
  84
  85 static const EVP_PKEY_METHOD *standard_methods[] = {
  86 #ifndef OPENSSL_NO_RSA
  87         &rsa_pkey_meth,
  88 #endif
  89 #ifndef OPENSSL_NO_DH
  90         &dh_pkey_meth,
  91 #endif
  92 #ifndef OPENSSL_NO_DSA
  93         &dsa_pkey_meth,
  94 #endif
  95 #ifndef OPENSSL_NO_EC
  96         &ec_pkey_meth,
  97 #endif
  98 #ifndef OPENSSL_NO_GOST
  99         &gostr01_pkey_meth,
 100         &gostimit_pkey_meth,
 101 #endif
 102         &hmac_pkey_meth,
 103         &cmac_pkey_meth,
 104 };
 105
 106 static int pmeth_cmp_BSEARCH_CMP_FN(const void *, const void *);
 107 static int pmeth_cmp(const EVP_PKEY_METHOD * const *, const EVP_PKEY_METHOD * const *);
 108 static const EVP_PKEY_METHOD * *OBJ_bsearch_pmeth(const EVP_PKEY_METHOD * *key, const EVP_PKEY_METHOD * const *base, int num);
 109
 110 static int
 111 pmeth_cmp(const EVP_PKEY_METHOD * const *a, const EVP_PKEY_METHOD * const *b)
 112 {
 113         return ((*a)->pkey_id - (*b)->pkey_id);
 114 }
 115
 116
 117 static int
 118 pmeth_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_)
 119 {
 120         const EVP_PKEY_METHOD * const *a = a_;
 121         const EVP_PKEY_METHOD * const *b = b_;
 122         return pmeth_cmp(a, b);
 123 }
 124
 125 static const EVP_PKEY_METHOD * *
 126 OBJ_bsearch_pmeth(const EVP_PKEY_METHOD * *key, const EVP_PKEY_METHOD * const *base, int num)
 127 {
 128         return (const EVP_PKEY_METHOD * *)OBJ_bsearch_(key, base, num, sizeof(const EVP_PKEY_METHOD *),
 129             pmeth_cmp_BSEARCH_CMP_FN);
 130 }
 131
 132 const EVP_PKEY_METHOD *
 133 EVP_PKEY_meth_find(int type)
 134 {
 135         EVP_PKEY_METHOD tmp;
 136         const EVP_PKEY_METHOD *t = &tmp, **ret;
 137
 138         tmp.pkey_id = type;
 139         if (app_pkey_methods) {
 140                 int idx;
 141                 idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
 142                 if (idx >= 0)
 143                         return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 144         }
 145         ret = OBJ_bsearch_pmeth(&t, standard_methods,
 146             sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *));
 147         if (!ret || !*ret)
 148                 return NULL;
 149         return *ret;
 150 }
 151
 152 static EVP_PKEY_CTX *
 153 int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
 154 {
 155         EVP_PKEY_CTX *ret;
 156         const EVP_PKEY_METHOD *pmeth;
 157
 158         if (id == -1) {
 159                 if (!pkey || !pkey->ameth)
 160                         return NULL;
 161                 id = pkey->ameth->pkey_id;
 162         }
 163 #ifndef OPENSSL_NO_ENGINE
 164         if (pkey && pkey->engine)
 165                 e = pkey->engine;
 166         /* Try to find an ENGINE which implements this method */
 167         if (e) {
 168                 if (!ENGINE_init(e)) {
 169                         EVPerror(ERR_R_ENGINE_LIB);
 170                         return NULL;
 171                 }
 172         } else
 173                 e = ENGINE_get_pkey_meth_engine(id);
 174
 175         /* If an ENGINE handled this method look it up. Othewise
 176          * use internal tables.
 177          */
 178
 179         if (e)
 180                 pmeth = ENGINE_get_pkey_meth(e, id);
 181         else
 182 #endif
 183                 pmeth = EVP_PKEY_meth_find(id);
 184
 185         if (pmeth == NULL) {
 186                 EVPerror(EVP_R_UNSUPPORTED_ALGORITHM);
 187                 return NULL;
 188         }
 189
 190         ret = malloc(sizeof(EVP_PKEY_CTX));
 191         if (ret == NULL) {
 192 #ifndef OPENSSL_NO_ENGINE
 193                 ENGINE_finish(e);
 194 #endif
 195                 EVPerror(ERR_R_MALLOC_FAILURE);
 196                 return NULL;
 197         }
 198         ret->engine = e;
 199         ret->pmeth = pmeth;
 200         ret->operation = EVP_PKEY_OP_UNDEFINED;
 201         ret->pkey = pkey;
 202         ret->peerkey = NULL;
 203         ret->pkey_gencb = 0;
 204         if (pkey)
 205                 CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 206         ret->data = NULL;
 207
 208         if (pmeth->init) {
 209                 if (pmeth->init(ret) <= 0) {
 210                         EVP_PKEY_CTX_free(ret);
 211                         return NULL;
 212                 }
 213         }
 214
 215         return ret;
 216 }
 217
 218 EVP_PKEY_METHOD*
 219 EVP_PKEY_meth_new(int id, int flags)
 220 {
 221         EVP_PKEY_METHOD *pmeth;
 222
 223         pmeth = calloc(1, sizeof(EVP_PKEY_METHOD));
 224         if (!pmeth)
 225                 return NULL;
 226
 227         pmeth->pkey_id = id;
 228         pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 229
 230         pmeth->init = 0;
 231         pmeth->copy = 0;
 232         pmeth->cleanup = 0;
 233         pmeth->paramgen_init = 0;
 234         pmeth->paramgen = 0;
 235         pmeth->keygen_init = 0;
 236         pmeth->keygen = 0;
 237         pmeth->sign_init = 0;
 238         pmeth->sign = 0;
 239         pmeth->verify_init = 0;
 240         pmeth->verify = 0;
 241         pmeth->verify_recover_init = 0;
 242         pmeth->verify_recover = 0;
 243         pmeth->signctx_init = 0;
 244         pmeth->signctx = 0;
 245         pmeth->verifyctx_init = 0;
 246         pmeth->verifyctx = 0;
 247         pmeth->encrypt_init = 0;
 248         pmeth->encrypt = 0;
 249         pmeth->decrypt_init = 0;
 250         pmeth->decrypt = 0;
 251         pmeth->derive_init = 0;
 252         pmeth->derive = 0;
 253         pmeth->ctrl = 0;
 254         pmeth->ctrl_str = 0;
 255
 256         return pmeth;
 257 }
 258
 259 void
 260 EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags, const EVP_PKEY_METHOD *meth)
 261 {
 262         if (ppkey_id)
 263                 *ppkey_id = meth->pkey_id;
 264         if (pflags)
 265                 *pflags = meth->flags;
 266 }
 267
 268 void
 269 EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 270 {
 271         dst->init = src->init;
 272         dst->copy = src->copy;
 273         dst->cleanup = src->cleanup;
 274
 275         dst->paramgen_init = src->paramgen_init;
 276         dst->paramgen = src->paramgen;
 277
 278         dst->keygen_init = src->keygen_init;
 279         dst->keygen = src->keygen;
 280
 281         dst->sign_init = src->sign_init;
 282         dst->sign = src->sign;
 283
 284         dst->verify_init = src->verify_init;
 285         dst->verify = src->verify;
 286
 287         dst->verify_recover_init = src->verify_recover_init;
 288         dst->verify_recover = src->verify_recover;
 289
 290         dst->signctx_init = src->signctx_init;
 291         dst->signctx = src->signctx;
 292
 293         dst->verifyctx_init = src->verifyctx_init;
 294         dst->verifyctx = src->verifyctx;
 295
 296         dst->encrypt_init = src->encrypt_init;
 297         dst->encrypt = src->encrypt;
 298
 299         dst->decrypt_init = src->decrypt_init;
 300         dst->decrypt = src->decrypt;
 301
 302         dst->derive_init = src->derive_init;
 303         dst->derive = src->derive;
 304
 305         dst->ctrl = src->ctrl;
 306         dst->ctrl_str = src->ctrl_str;
 307 }
 308
 309 void
 310 EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 311 {
 312         if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 313                 free(pmeth);
 314 }
 315
 316 EVP_PKEY_CTX *
 317 EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 318 {
 319         return int_ctx_new(pkey, e, -1);
 320 }
 321
 322 EVP_PKEY_CTX *
 323 EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 324 {
 325         return int_ctx_new(NULL, e, id);
 326 }
 327
 328 EVP_PKEY_CTX *
 329 EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 330 {
 331         EVP_PKEY_CTX *rctx;
 332
 333         if (!pctx->pmeth || !pctx->pmeth->copy)
 334                 return NULL;
 335 #ifndef OPENSSL_NO_ENGINE
 336         /* Make sure it's safe to copy a pkey context using an ENGINE */
 337         if (pctx->engine && !ENGINE_init(pctx->engine)) {
 338                 EVPerror(ERR_R_ENGINE_LIB);
 339                 return 0;
 340         }
 341 #endif
 342         rctx = malloc(sizeof(EVP_PKEY_CTX));
 343         if (!rctx)
 344                 return NULL;
 345
 346         rctx->pmeth = pctx->pmeth;
 347 #ifndef OPENSSL_NO_ENGINE
 348         rctx->engine = pctx->engine;
 349 #endif
 350
 351         if (pctx->pkey)
 352                 CRYPTO_add(&pctx->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 353
 354         rctx->pkey = pctx->pkey;
 355
 356         if (pctx->peerkey)
 357                 CRYPTO_add(&pctx->peerkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 358
 359         rctx->peerkey = pctx->peerkey;
 360
 361         rctx->data = NULL;
 362         rctx->app_data = NULL;
 363         rctx->operation = pctx->operation;
 364
 365         if (pctx->pmeth->copy(rctx, pctx) > 0)
 366                 return rctx;
 367
 368         EVP_PKEY_CTX_free(rctx);
 369         return NULL;
 370 }
 371
 372 int
 373 EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 374 {
 375         if (app_pkey_methods == NULL) {
 376                 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 377                 if (!app_pkey_methods)
 378                         return 0;
 379         }
 380         if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
 381                 return 0;
 382         sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 383         return 1;
 384 }
 385
 386 void
 387 EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 388 {
 389         if (ctx == NULL)
 390                 return;
 391         if (ctx->pmeth && ctx->pmeth->cleanup)
 392                 ctx->pmeth->cleanup(ctx);
 393         EVP_PKEY_free(ctx->pkey);
 394         EVP_PKEY_free(ctx->peerkey);
 395 #ifndef OPENSSL_NO_ENGINE
 396         ENGINE_finish(ctx->engine);
 397 #endif
 398         free(ctx);
 399 }
 400
 401 int
 402 EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype, int cmd,
 403     int p1, void *p2)
 404 {
 405         int ret;
 406
 407         if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 408                 EVPerror(EVP_R_COMMAND_NOT_SUPPORTED);
 409                 return -2;
 410         }
 411         if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 412                 return -1;
 413
 414         if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 415                 EVPerror(EVP_R_NO_OPERATION_SET);
 416                 return -1;
 417         }
 418
 419         if ((optype != -1) && !(ctx->operation & optype)) {
 420                 EVPerror(EVP_R_INVALID_OPERATION);
 421                 return -1;
 422         }
 423
 424         ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 425
 426         if (ret == -2)
 427                 EVPerror(EVP_R_COMMAND_NOT_SUPPORTED);
 428
 429         return ret;
 430
 431 }
 432
 433 int
 434 EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx, const char *name, const char *value)
 435 {
 436         if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 437                 EVPerror(EVP_R_COMMAND_NOT_SUPPORTED);
 438                 return -2;
 439         }
 440         if (!strcmp(name, "digest")) {
 441                 const EVP_MD *md;
 442                 if (!value || !(md = EVP_get_digestbyname(value))) {
 443                         EVPerror(EVP_R_INVALID_DIGEST);
 444                         return 0;
 445                 }
 446                 return EVP_PKEY_CTX_set_signature_md(ctx, md);
 447         }
 448         return ctx->pmeth->ctrl_str(ctx, name, value);
 449 }
 450
 451 int
 452 EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 453 {
 454         return ctx->operation;
 455 }
 456
 457 void
 458 EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 459 {
 460         ctx->keygen_info = dat;
 461         ctx->keygen_info_count = datlen;
 462 }
 463
 464 void
 465 EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 466 {
 467         ctx->data = data;
 468 }
 469
 470 void *
 471 EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 472 {
 473         return ctx->data;
 474 }
 475
 476 EVP_PKEY *
 477 EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 478 {
 479         return ctx->pkey;
 480 }
 481
 482 EVP_PKEY *
 483 EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 484 {
 485         return ctx->peerkey;
 486 }
 487
 488 void
 489 EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 490 {
 491         ctx->app_data = data;
 492 }
 493
 494 void *
 495 EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 496 {
 497         return ctx->app_data;
 498 }
 499
 500 void
 501 EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 502     int (*init)(EVP_PKEY_CTX *ctx))
 503 {
 504         pmeth->init = init;
 505 }
 506
 507 void
 508 EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 509     int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
 510 {
 511         pmeth->copy = copy;
 512 }
 513
 514 void
 515 EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 516     void (*cleanup)(EVP_PKEY_CTX *ctx))
 517 {
 518         pmeth->cleanup = cleanup;
 519 }
 520
 521 void
 522 EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 523     int (*paramgen_init)(EVP_PKEY_CTX *ctx),
 524     int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
 525 {
 526         pmeth->paramgen_init = paramgen_init;
 527         pmeth->paramgen = paramgen;
 528 }
 529
 530 void
 531 EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 532     int (*keygen_init)(EVP_PKEY_CTX *ctx),
 533     int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
 534 {
 535         pmeth->keygen_init = keygen_init;
 536         pmeth->keygen = keygen;
 537 }
 538
 539 void
 540 EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 541     int (*sign_init)(EVP_PKEY_CTX *ctx),
 542     int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 543     const unsigned char *tbs, size_t tbslen))
 544 {
 545         pmeth->sign_init = sign_init;
 546         pmeth->sign = sign;
 547 }
 548
 549 void
 550 EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 551     int (*verify_init)(EVP_PKEY_CTX *ctx),
 552     int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
 553     const unsigned char *tbs, size_t tbslen))
 554 {
 555         pmeth->verify_init = verify_init;
 556         pmeth->verify = verify;
 557 }
 558
 559 void
 560 EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 561     int (*verify_recover_init)(EVP_PKEY_CTX *ctx),
 562     int (*verify_recover)(EVP_PKEY_CTX *ctx,
 563     unsigned char *sig, size_t *siglen,
 564     const unsigned char *tbs, size_t tbslen))
 565 {
 566         pmeth->verify_recover_init = verify_recover_init;
 567         pmeth->verify_recover = verify_recover;
 568 }
 569
 570 void
 571 EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 572     int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
 573     int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 574     EVP_MD_CTX *mctx))
 575 {
 576         pmeth->signctx_init = signctx_init;
 577         pmeth->signctx = signctx;
 578 }
 579
 580 void
 581 EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 582     int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
 583     int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen,
 584     EVP_MD_CTX *mctx))
 585 {
 586         pmeth->verifyctx_init = verifyctx_init;
 587         pmeth->verifyctx = verifyctx;
 588 }
 589
 590 void
 591 EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 592     int (*encrypt_init)(EVP_PKEY_CTX *ctx),
 593     int (*encryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 594     const unsigned char *in, size_t inlen))
 595 {
 596         pmeth->encrypt_init = encrypt_init;
 597         pmeth->encrypt = encryptfn;
 598 }
 599
 600 void
 601 EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 602     int (*decrypt_init)(EVP_PKEY_CTX *ctx),
 603     int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 604     const unsigned char *in, size_t inlen))
 605 {
 606         pmeth->decrypt_init = decrypt_init;
 607         pmeth->decrypt = decrypt;
 608 }
 609
 610 void
 611 EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 612     int (*derive_init)(EVP_PKEY_CTX *ctx),
 613     int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
 614 {
 615         pmeth->derive_init = derive_init;
 616         pmeth->derive = derive;
 617 }
 618
 619 void
 620 EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 621     int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
 622     int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
 623 {
 624         pmeth->ctrl = ctrl;
 625         pmeth->ctrl_str = ctrl_str;
 626 }