crypto/evp/pmeth_lib.c

   1 /*
   2  * Copyright 2006-2017 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include "internal/cryptlib.h"
  13 #include <openssl/engine.h>
  14 #include <openssl/evp.h>
  15 #include <openssl/x509v3.h>
  16 #include "internal/asn1_int.h"
  17 #include "internal/evp_int.h"
  18 #include "internal/numbers.h"
  19
  20 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  21
  22 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  23
  24 /* This array needs to be in order of NIDs */
  25 static const EVP_PKEY_METHOD *standard_methods[] = {
  26 #ifndef OPENSSL_NO_RSA
  27     &rsa_pkey_meth,
  28 #endif
  29 #ifndef OPENSSL_NO_DH
  30     &dh_pkey_meth,
  31 #endif
  32 #ifndef OPENSSL_NO_DSA
  33     &dsa_pkey_meth,
  34 #endif
  35 #ifndef OPENSSL_NO_EC
  36     &ec_pkey_meth,
  37 #endif
  38     &hmac_pkey_meth,
  39 #ifndef OPENSSL_NO_CMAC
  40     &cmac_pkey_meth,
  41 #endif
  42 #ifndef OPENSSL_NO_RSA
  43     &rsa_pss_pkey_meth,
  44 #endif
  45 #ifndef OPENSSL_NO_DH
  46     &dhx_pkey_meth,
  47 #endif
  48 #ifndef OPENSSL_NO_SCRYPT
  49     &scrypt_pkey_meth,
  50 #endif
  51     &tls1_prf_pkey_meth,
  52 #ifndef OPENSSL_NO_EC
  53     &ecx25519_pkey_meth,
  54 #endif
  55     &hkdf_pkey_meth,
  56 #ifndef OPENSSL_NO_POLY1305
  57     &poly1305_pkey_meth,
  58 #endif
  59 #ifndef OPENSSL_NO_SIPHASH
  60     &siphash_pkey_meth,
  61 #endif
  62 #ifndef OPENSSL_NO_EC
  63     &ed25519_pkey_meth,
  64 #endif
  65 };
  66
  67 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  68                            pmeth);
  69
  70 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
  71                      const EVP_PKEY_METHOD *const *b)
  72 {
  73     return ((*a)->pkey_id - (*b)->pkey_id);
  74 }
  75
  76 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  77                              pmeth);
  78
  79 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
  80 {
  81     EVP_PKEY_METHOD tmp;
  82     const EVP_PKEY_METHOD *t = &tmp, **ret;
  83     tmp.pkey_id = type;
  84     if (app_pkey_methods) {
  85         int idx;
  86         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
  87         if (idx >= 0)
  88             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
  89     }
  90     ret = OBJ_bsearch_pmeth(&t, standard_methods,
  91                             sizeof(standard_methods) /
  92                             sizeof(EVP_PKEY_METHOD *));
  93     if (!ret || !*ret)
  94         return NULL;
  95     return *ret;
  96 }
  97
  98 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
  99 {
 100     EVP_PKEY_CTX *ret;
 101     const EVP_PKEY_METHOD *pmeth;
 102     if (id == -1) {
 103         if (!pkey || !pkey->ameth)
 104             return NULL;
 105         id = pkey->ameth->pkey_id;
 106     }
 107 #ifndef OPENSSL_NO_ENGINE
 108     if (e == NULL && pkey != NULL)
 109         e = pkey->pmeth_engine != NULL ? pkey->pmeth_engine : pkey->engine;
 110     /* Try to find an ENGINE which implements this method */
 111     if (e) {
 112         if (!ENGINE_init(e)) {
 113             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 114             return NULL;
 115         }
 116     } else {
 117         e = ENGINE_get_pkey_meth_engine(id);
 118     }
 119
 120     /*
 121      * If an ENGINE handled this method look it up. Otherwise use internal
 122      * tables.
 123      */
 124
 125     if (e)
 126         pmeth = ENGINE_get_pkey_meth(e, id);
 127     else
 128 #endif
 129         pmeth = EVP_PKEY_meth_find(id);
 130
 131     if (pmeth == NULL) {
 132 #ifndef OPENSSL_NO_ENGINE
 133         ENGINE_finish(e);
 134 #endif
 135         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 136         return NULL;
 137     }
 138
 139     ret = OPENSSL_zalloc(sizeof(*ret));
 140     if (ret == NULL) {
 141 #ifndef OPENSSL_NO_ENGINE
 142         ENGINE_finish(e);
 143 #endif
 144         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 145         return NULL;
 146     }
 147     ret->engine = e;
 148     ret->pmeth = pmeth;
 149     ret->operation = EVP_PKEY_OP_UNDEFINED;
 150     ret->pkey = pkey;
 151     if (pkey)
 152         EVP_PKEY_up_ref(pkey);
 153
 154     if (pmeth->init) {
 155         if (pmeth->init(ret) <= 0) {
 156             ret->pmeth = NULL;
 157             EVP_PKEY_CTX_free(ret);
 158             return NULL;
 159         }
 160     }
 161
 162     return ret;
 163 }
 164
 165 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 166 {
 167     EVP_PKEY_METHOD *pmeth;
 168
 169     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 170     if (pmeth == NULL)
 171         return NULL;
 172
 173     pmeth->pkey_id = id;
 174     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 175     return pmeth;
 176 }
 177
 178 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 179                              const EVP_PKEY_METHOD *meth)
 180 {
 181     if (ppkey_id)
 182         *ppkey_id = meth->pkey_id;
 183     if (pflags)
 184         *pflags = meth->flags;
 185 }
 186
 187 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 188 {
 189
 190     dst->init = src->init;
 191     dst->copy = src->copy;
 192     dst->cleanup = src->cleanup;
 193
 194     dst->paramgen_init = src->paramgen_init;
 195     dst->paramgen = src->paramgen;
 196
 197     dst->keygen_init = src->keygen_init;
 198     dst->keygen = src->keygen;
 199
 200     dst->sign_init = src->sign_init;
 201     dst->sign = src->sign;
 202
 203     dst->verify_init = src->verify_init;
 204     dst->verify = src->verify;
 205
 206     dst->verify_recover_init = src->verify_recover_init;
 207     dst->verify_recover = src->verify_recover;
 208
 209     dst->signctx_init = src->signctx_init;
 210     dst->signctx = src->signctx;
 211
 212     dst->verifyctx_init = src->verifyctx_init;
 213     dst->verifyctx = src->verifyctx;
 214
 215     dst->encrypt_init = src->encrypt_init;
 216     dst->encrypt = src->encrypt;
 217
 218     dst->decrypt_init = src->decrypt_init;
 219     dst->decrypt = src->decrypt;
 220
 221     dst->derive_init = src->derive_init;
 222     dst->derive = src->derive;
 223
 224     dst->ctrl = src->ctrl;
 225     dst->ctrl_str = src->ctrl_str;
 226
 227     dst->check = src->check;
 228 }
 229
 230 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 231 {
 232     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 233         OPENSSL_free(pmeth);
 234 }
 235
 236 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 237 {
 238     return int_ctx_new(pkey, e, -1);
 239 }
 240
 241 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 242 {
 243     return int_ctx_new(NULL, e, id);
 244 }
 245
 246 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 247 {
 248     EVP_PKEY_CTX *rctx;
 249     if (!pctx->pmeth || !pctx->pmeth->copy)
 250         return NULL;
 251 #ifndef OPENSSL_NO_ENGINE
 252     /* Make sure it's safe to copy a pkey context using an ENGINE */
 253     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 254         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 255         return 0;
 256     }
 257 #endif
 258     rctx = OPENSSL_malloc(sizeof(*rctx));
 259     if (rctx == NULL)
 260         return NULL;
 261
 262     rctx->pmeth = pctx->pmeth;
 263 #ifndef OPENSSL_NO_ENGINE
 264     rctx->engine = pctx->engine;
 265 #endif
 266
 267     if (pctx->pkey)
 268         EVP_PKEY_up_ref(pctx->pkey);
 269
 270     rctx->pkey = pctx->pkey;
 271
 272     if (pctx->peerkey)
 273         EVP_PKEY_up_ref(pctx->peerkey);
 274
 275     rctx->peerkey = pctx->peerkey;
 276
 277     rctx->data = NULL;
 278     rctx->app_data = NULL;
 279     rctx->operation = pctx->operation;
 280
 281     if (pctx->pmeth->copy(rctx, pctx) > 0)
 282         return rctx;
 283
 284     rctx->pmeth = NULL;
 285     EVP_PKEY_CTX_free(rctx);
 286     return NULL;
 287
 288 }
 289
 290 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 291 {
 292     if (app_pkey_methods == NULL) {
 293         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 294         if (app_pkey_methods == NULL)
 295             return 0;
 296     }
 297     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
 298         return 0;
 299     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 300     return 1;
 301 }
 302
 303 void evp_app_cleanup_int(void)
 304 {
 305     if (app_pkey_methods != NULL)
 306         sk_EVP_PKEY_METHOD_pop_free(app_pkey_methods, EVP_PKEY_meth_free);
 307 }
 308
 309 int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth)
 310 {
 311     const EVP_PKEY_METHOD *ret;
 312
 313     ret = sk_EVP_PKEY_METHOD_delete_ptr(app_pkey_methods, pmeth);
 314
 315     return ret == NULL ? 0 : 1;
 316 }
 317
 318 size_t EVP_PKEY_meth_get_count(void)
 319 {
 320     size_t rv = OSSL_NELEM(standard_methods);
 321
 322     if (app_pkey_methods)
 323         rv += sk_EVP_PKEY_METHOD_num(app_pkey_methods);
 324     return rv;
 325 }
 326
 327 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx)
 328 {
 329     if (idx < OSSL_NELEM(standard_methods))
 330         return standard_methods[idx];
 331     if (app_pkey_methods == NULL)
 332         return NULL;
 333     idx -= OSSL_NELEM(standard_methods);
 334     if (idx >= (size_t)sk_EVP_PKEY_METHOD_num(app_pkey_methods))
 335         return NULL;
 336     return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 337 }
 338
 339 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 340 {
 341     if (ctx == NULL)
 342         return;
 343     if (ctx->pmeth && ctx->pmeth->cleanup)
 344         ctx->pmeth->cleanup(ctx);
 345     EVP_PKEY_free(ctx->pkey);
 346     EVP_PKEY_free(ctx->peerkey);
 347 #ifndef OPENSSL_NO_ENGINE
 348     ENGINE_finish(ctx->engine);
 349 #endif
 350     OPENSSL_free(ctx);
 351 }
 352
 353 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 354                       int cmd, int p1, void *p2)
 355 {
 356     int ret;
 357     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 358         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 359         return -2;
 360     }
 361     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 362         return -1;
 363
 364     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 365         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 366         return -1;
 367     }
 368
 369     if ((optype != -1) && !(ctx->operation & optype)) {
 370         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 371         return -1;
 372     }
 373
 374     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 375
 376     if (ret == -2)
 377         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 378
 379     return ret;
 380
 381 }
 382
 383 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 384                              int cmd, uint64_t value)
 385 {
 386     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 387 }
 388
 389 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 390                           const char *name, const char *value)
 391 {
 392     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 393         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 394         return -2;
 395     }
 396     if (strcmp(name, "digest") == 0)
 397         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
 398                                value);
 399     return ctx->pmeth->ctrl_str(ctx, name, value);
 400 }
 401
 402 /* Utility functions to send a string of hex string to a ctrl */
 403
 404 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 405 {
 406     size_t len;
 407
 408     len = strlen(str);
 409     if (len > INT_MAX)
 410         return -1;
 411     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 412 }
 413
 414 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 415 {
 416     unsigned char *bin;
 417     long binlen;
 418     int rv = -1;
 419
 420     bin = OPENSSL_hexstr2buf(hex, &binlen);
 421     if (bin == NULL)
 422         return 0;
 423     if (binlen <= INT_MAX)
 424         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 425     OPENSSL_free(bin);
 426     return rv;
 427 }
 428
 429 /* Pass a message digest to a ctrl */
 430 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
 431 {
 432     const EVP_MD *m;
 433
 434     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
 435         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
 436         return 0;
 437     }
 438     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
 439 }
 440
 441 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 442 {
 443     return ctx->operation;
 444 }
 445
 446 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 447 {
 448     ctx->keygen_info = dat;
 449     ctx->keygen_info_count = datlen;
 450 }
 451
 452 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 453 {
 454     ctx->data = data;
 455 }
 456
 457 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 458 {
 459     return ctx->data;
 460 }
 461
 462 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 463 {
 464     return ctx->pkey;
 465 }
 466
 467 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 468 {
 469     return ctx->peerkey;
 470 }
 471
 472 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 473 {
 474     ctx->app_data = data;
 475 }
 476
 477 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 478 {
 479     return ctx->app_data;
 480 }
 481
 482 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 483                             int (*init) (EVP_PKEY_CTX *ctx))
 484 {
 485     pmeth->init = init;
 486 }
 487
 488 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 489                             int (*copy) (EVP_PKEY_CTX *dst,
 490                                          EVP_PKEY_CTX *src))
 491 {
 492     pmeth->copy = copy;
 493 }
 494
 495 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 496                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 497 {
 498     pmeth->cleanup = cleanup;
 499 }
 500
 501 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 502                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 503                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 504                                                  EVP_PKEY *pkey))
 505 {
 506     pmeth->paramgen_init = paramgen_init;
 507     pmeth->paramgen = paramgen;
 508 }
 509
 510 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 511                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 512                               int (*keygen) (EVP_PKEY_CTX *ctx,
 513                                              EVP_PKEY *pkey))
 514 {
 515     pmeth->keygen_init = keygen_init;
 516     pmeth->keygen = keygen;
 517 }
 518
 519 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 520                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 521                             int (*sign) (EVP_PKEY_CTX *ctx,
 522                                          unsigned char *sig, size_t *siglen,
 523                                          const unsigned char *tbs,
 524                                          size_t tbslen))
 525 {
 526     pmeth->sign_init = sign_init;
 527     pmeth->sign = sign;
 528 }
 529
 530 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 531                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 532                               int (*verify) (EVP_PKEY_CTX *ctx,
 533                                              const unsigned char *sig,
 534                                              size_t siglen,
 535                                              const unsigned char *tbs,
 536                                              size_t tbslen))
 537 {
 538     pmeth->verify_init = verify_init;
 539     pmeth->verify = verify;
 540 }
 541
 542 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 543                                       int (*verify_recover_init) (EVP_PKEY_CTX
 544                                                                   *ctx),
 545                                       int (*verify_recover) (EVP_PKEY_CTX
 546                                                              *ctx,
 547                                                              unsigned char
 548                                                              *sig,
 549                                                              size_t *siglen,
 550                                                              const unsigned
 551                                                              char *tbs,
 552                                                              size_t tbslen))
 553 {
 554     pmeth->verify_recover_init = verify_recover_init;
 555     pmeth->verify_recover = verify_recover;
 556 }
 557
 558 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 559                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 560                                                     EVP_MD_CTX *mctx),
 561                                int (*signctx) (EVP_PKEY_CTX *ctx,
 562                                                unsigned char *sig,
 563                                                size_t *siglen,
 564                                                EVP_MD_CTX *mctx))
 565 {
 566     pmeth->signctx_init = signctx_init;
 567     pmeth->signctx = signctx;
 568 }
 569
 570 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 571                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 572                                                         EVP_MD_CTX *mctx),
 573                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 574                                                    const unsigned char *sig,
 575                                                    int siglen,
 576                                                    EVP_MD_CTX *mctx))
 577 {
 578     pmeth->verifyctx_init = verifyctx_init;
 579     pmeth->verifyctx = verifyctx;
 580 }
 581
 582 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 583                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 584                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 585                                                  unsigned char *out,
 586                                                  size_t *outlen,
 587                                                  const unsigned char *in,
 588                                                  size_t inlen))
 589 {
 590     pmeth->encrypt_init = encrypt_init;
 591     pmeth->encrypt = encryptfn;
 592 }
 593
 594 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 595                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 596                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 597                                                unsigned char *out,
 598                                                size_t *outlen,
 599                                                const unsigned char *in,
 600                                                size_t inlen))
 601 {
 602     pmeth->decrypt_init = decrypt_init;
 603     pmeth->decrypt = decrypt;
 604 }
 605
 606 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 607                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 608                               int (*derive) (EVP_PKEY_CTX *ctx,
 609                                              unsigned char *key,
 610                                              size_t *keylen))
 611 {
 612     pmeth->derive_init = derive_init;
 613     pmeth->derive = derive;
 614 }
 615
 616 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 617                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 618                                          void *p2),
 619                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 620                                              const char *type,
 621                                              const char *value))
 622 {
 623     pmeth->ctrl = ctrl;
 624     pmeth->ctrl_str = ctrl_str;
 625 }
 626
 627 void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
 628                              int (*check) (EVP_PKEY *pkey))
 629 {
 630     pmeth->check = check;
 631 }
 632
 633 void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
 634                                     int (*check) (EVP_PKEY *pkey))
 635 {
 636     pmeth->public_check = check;
 637 }
 638
 639 void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
 640                                    int (*check) (EVP_PKEY *pkey))
 641 {
 642     pmeth->param_check = check;
 643 }
 644
 645 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
 646                             int (**pinit) (EVP_PKEY_CTX *ctx))
 647 {
 648     *pinit = pmeth->init;
 649 }
 650
 651 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
 652                             int (**pcopy) (EVP_PKEY_CTX *dst,
 653                                            EVP_PKEY_CTX *src))
 654 {
 655     *pcopy = pmeth->copy;
 656 }
 657
 658 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
 659                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 660 {
 661     *pcleanup = pmeth->cleanup;
 662 }
 663
 664 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
 665                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 666                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 667                                                    EVP_PKEY *pkey))
 668 {
 669     if (pparamgen_init)
 670         *pparamgen_init = pmeth->paramgen_init;
 671     if (pparamgen)
 672         *pparamgen = pmeth->paramgen;
 673 }
 674
 675 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
 676                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 677                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 678                                                EVP_PKEY *pkey))
 679 {
 680     if (pkeygen_init)
 681         *pkeygen_init = pmeth->keygen_init;
 682     if (pkeygen)
 683         *pkeygen = pmeth->keygen;
 684 }
 685
 686 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
 687                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 688                             int (**psign) (EVP_PKEY_CTX *ctx,
 689                                            unsigned char *sig, size_t *siglen,
 690                                            const unsigned char *tbs,
 691                                            size_t tbslen))
 692 {
 693     if (psign_init)
 694         *psign_init = pmeth->sign_init;
 695     if (psign)
 696         *psign = pmeth->sign;
 697 }
 698
 699 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
 700                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 701                               int (**pverify) (EVP_PKEY_CTX *ctx,
 702                                                const unsigned char *sig,
 703                                                size_t siglen,
 704                                                const unsigned char *tbs,
 705                                                size_t tbslen))
 706 {
 707     if (pverify_init)
 708         *pverify_init = pmeth->verify_init;
 709     if (pverify)
 710         *pverify = pmeth->verify;
 711 }
 712
 713 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
 714                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 715                                                                     *ctx),
 716                                       int (**pverify_recover) (EVP_PKEY_CTX
 717                                                                *ctx,
 718                                                                unsigned char
 719                                                                *sig,
 720                                                                size_t *siglen,
 721                                                                const unsigned
 722                                                                char *tbs,
 723                                                                size_t tbslen))
 724 {
 725     if (pverify_recover_init)
 726         *pverify_recover_init = pmeth->verify_recover_init;
 727     if (pverify_recover)
 728         *pverify_recover = pmeth->verify_recover;
 729 }
 730
 731 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
 732                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 733                                                       EVP_MD_CTX *mctx),
 734                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 735                                                  unsigned char *sig,
 736                                                  size_t *siglen,
 737                                                  EVP_MD_CTX *mctx))
 738 {
 739     if (psignctx_init)
 740         *psignctx_init = pmeth->signctx_init;
 741     if (psignctx)
 742         *psignctx = pmeth->signctx;
 743 }
 744
 745 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
 746                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 747                                                           EVP_MD_CTX *mctx),
 748                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 749                                                      const unsigned char *sig,
 750                                                      int siglen,
 751                                                      EVP_MD_CTX *mctx))
 752 {
 753     if (pverifyctx_init)
 754         *pverifyctx_init = pmeth->verifyctx_init;
 755     if (pverifyctx)
 756         *pverifyctx = pmeth->verifyctx;
 757 }
 758
 759 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
 760                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 761                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 762                                                    unsigned char *out,
 763                                                    size_t *outlen,
 764                                                    const unsigned char *in,
 765                                                    size_t inlen))
 766 {
 767     if (pencrypt_init)
 768         *pencrypt_init = pmeth->encrypt_init;
 769     if (pencryptfn)
 770         *pencryptfn = pmeth->encrypt;
 771 }
 772
 773 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
 774                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 775                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 776                                                  unsigned char *out,
 777                                                  size_t *outlen,
 778                                                  const unsigned char *in,
 779                                                  size_t inlen))
 780 {
 781     if (pdecrypt_init)
 782         *pdecrypt_init = pmeth->decrypt_init;
 783     if (pdecrypt)
 784         *pdecrypt = pmeth->decrypt;
 785 }
 786
 787 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
 788                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 789                               int (**pderive) (EVP_PKEY_CTX *ctx,
 790                                                unsigned char *key,
 791                                                size_t *keylen))
 792 {
 793     if (pderive_init)
 794         *pderive_init = pmeth->derive_init;
 795     if (pderive)
 796         *pderive = pmeth->derive;
 797 }
 798
 799 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
 800                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 801                                            void *p2),
 802                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 803                                                const char *type,
 804                                                const char *value))
 805 {
 806     if (pctrl)
 807         *pctrl = pmeth->ctrl;
 808     if (pctrl_str)
 809         *pctrl_str = pmeth->ctrl_str;
 810 }
 811
 812 void EVP_PKEY_meth_get_check(EVP_PKEY_METHOD *pmeth,
 813                              int (**pcheck) (EVP_PKEY *pkey))
 814 {
 815     if (*pcheck)
 816         *pcheck = pmeth->check;
 817 }
 818
 819 void EVP_PKEY_meth_get_public_check(EVP_PKEY_METHOD *pmeth,
 820                                     int (**pcheck) (EVP_PKEY *pkey))
 821 {
 822     if (*pcheck)
 823         *pcheck = pmeth->public_check;
 824 }
 825
 826 void EVP_PKEY_meth_get_param_check(EVP_PKEY_METHOD *pmeth,
 827                                    int (**pcheck) (EVP_PKEY *pkey))
 828 {
 829     if (*pcheck)
 830         *pcheck = pmeth->param_check;
 831 }