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 (pkey && pkey->engine)
 109         e = 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      * If an ENGINE handled this method look it up. Otherwise use internal
 121      * tables.
 122      */
 123
 124     if (e)
 125         pmeth = ENGINE_get_pkey_meth(e, id);
 126     else
 127 #endif
 128         pmeth = EVP_PKEY_meth_find(id);
 129
 130     if (pmeth == NULL) {
 131         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 132         return NULL;
 133     }
 134
 135     ret = OPENSSL_zalloc(sizeof(*ret));
 136     if (ret == NULL) {
 137 #ifndef OPENSSL_NO_ENGINE
 138         ENGINE_finish(e);
 139 #endif
 140         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 141         return NULL;
 142     }
 143     ret->engine = e;
 144     ret->pmeth = pmeth;
 145     ret->operation = EVP_PKEY_OP_UNDEFINED;
 146     ret->pkey = pkey;
 147     if (pkey)
 148         EVP_PKEY_up_ref(pkey);
 149
 150     if (pmeth->init) {
 151         if (pmeth->init(ret) <= 0) {
 152             ret->pmeth = NULL;
 153             EVP_PKEY_CTX_free(ret);
 154             return NULL;
 155         }
 156     }
 157
 158     return ret;
 159 }
 160
 161 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 162 {
 163     EVP_PKEY_METHOD *pmeth;
 164
 165     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 166     if (pmeth == NULL)
 167         return NULL;
 168
 169     pmeth->pkey_id = id;
 170     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 171     return pmeth;
 172 }
 173
 174 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 175                              const EVP_PKEY_METHOD *meth)
 176 {
 177     if (ppkey_id)
 178         *ppkey_id = meth->pkey_id;
 179     if (pflags)
 180         *pflags = meth->flags;
 181 }
 182
 183 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 184 {
 185
 186     dst->init = src->init;
 187     dst->copy = src->copy;
 188     dst->cleanup = src->cleanup;
 189
 190     dst->paramgen_init = src->paramgen_init;
 191     dst->paramgen = src->paramgen;
 192
 193     dst->keygen_init = src->keygen_init;
 194     dst->keygen = src->keygen;
 195
 196     dst->sign_init = src->sign_init;
 197     dst->sign = src->sign;
 198
 199     dst->verify_init = src->verify_init;
 200     dst->verify = src->verify;
 201
 202     dst->verify_recover_init = src->verify_recover_init;
 203     dst->verify_recover = src->verify_recover;
 204
 205     dst->signctx_init = src->signctx_init;
 206     dst->signctx = src->signctx;
 207
 208     dst->verifyctx_init = src->verifyctx_init;
 209     dst->verifyctx = src->verifyctx;
 210
 211     dst->encrypt_init = src->encrypt_init;
 212     dst->encrypt = src->encrypt;
 213
 214     dst->decrypt_init = src->decrypt_init;
 215     dst->decrypt = src->decrypt;
 216
 217     dst->derive_init = src->derive_init;
 218     dst->derive = src->derive;
 219
 220     dst->ctrl = src->ctrl;
 221     dst->ctrl_str = src->ctrl_str;
 222 }
 223
 224 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 225 {
 226     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 227         OPENSSL_free(pmeth);
 228 }
 229
 230 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 231 {
 232     return int_ctx_new(pkey, e, -1);
 233 }
 234
 235 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 236 {
 237     return int_ctx_new(NULL, e, id);
 238 }
 239
 240 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 241 {
 242     EVP_PKEY_CTX *rctx;
 243     if (!pctx->pmeth || !pctx->pmeth->copy)
 244         return NULL;
 245 #ifndef OPENSSL_NO_ENGINE
 246     /* Make sure it's safe to copy a pkey context using an ENGINE */
 247     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 248         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 249         return 0;
 250     }
 251 #endif
 252     rctx = OPENSSL_malloc(sizeof(*rctx));
 253     if (rctx == NULL)
 254         return NULL;
 255
 256     rctx->pmeth = pctx->pmeth;
 257 #ifndef OPENSSL_NO_ENGINE
 258     rctx->engine = pctx->engine;
 259 #endif
 260
 261     if (pctx->pkey)
 262         EVP_PKEY_up_ref(pctx->pkey);
 263
 264     rctx->pkey = pctx->pkey;
 265
 266     if (pctx->peerkey)
 267         EVP_PKEY_up_ref(pctx->peerkey);
 268
 269     rctx->peerkey = pctx->peerkey;
 270
 271     rctx->data = NULL;
 272     rctx->app_data = NULL;
 273     rctx->operation = pctx->operation;
 274
 275     if (pctx->pmeth->copy(rctx, pctx) > 0)
 276         return rctx;
 277
 278     rctx->pmeth = NULL;
 279     EVP_PKEY_CTX_free(rctx);
 280     return NULL;
 281
 282 }
 283
 284 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 285 {
 286     if (app_pkey_methods == NULL) {
 287         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 288         if (app_pkey_methods == NULL)
 289             return 0;
 290     }
 291     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
 292         return 0;
 293     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 294     return 1;
 295 }
 296
 297 size_t EVP_PKEY_meth_get_count(void)
 298 {
 299     size_t rv = OSSL_NELEM(standard_methods);
 300
 301     if (app_pkey_methods)
 302         rv += sk_EVP_PKEY_METHOD_num(app_pkey_methods);
 303     return rv;
 304 }
 305
 306 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx)
 307 {
 308     if (idx < OSSL_NELEM(standard_methods))
 309         return standard_methods[idx];
 310     if (app_pkey_methods == NULL)
 311         return NULL;
 312     idx -= OSSL_NELEM(standard_methods);
 313     if (idx >= (size_t)sk_EVP_PKEY_METHOD_num(app_pkey_methods))
 314         return NULL;
 315     return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 316 }
 317
 318 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 319 {
 320     if (ctx == NULL)
 321         return;
 322     if (ctx->pmeth && ctx->pmeth->cleanup)
 323         ctx->pmeth->cleanup(ctx);
 324     EVP_PKEY_free(ctx->pkey);
 325     EVP_PKEY_free(ctx->peerkey);
 326 #ifndef OPENSSL_NO_ENGINE
 327     ENGINE_finish(ctx->engine);
 328 #endif
 329     OPENSSL_free(ctx);
 330 }
 331
 332 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 333                       int cmd, int p1, void *p2)
 334 {
 335     int ret;
 336     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 337         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 338         return -2;
 339     }
 340     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 341         return -1;
 342
 343     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 344         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 345         return -1;
 346     }
 347
 348     if ((optype != -1) && !(ctx->operation & optype)) {
 349         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 350         return -1;
 351     }
 352
 353     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 354
 355     if (ret == -2)
 356         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 357
 358     return ret;
 359
 360 }
 361
 362 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 363                                 int cmd, uint64_t value)
 364 {
 365     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 366 }
 367
 368 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 369                           const char *name, const char *value)
 370 {
 371     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 372         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 373         return -2;
 374     }
 375     if (strcmp(name, "digest") == 0)
 376         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
 377                                value);
 378     return ctx->pmeth->ctrl_str(ctx, name, value);
 379 }
 380
 381 /* Utility functions to send a string of hex string to a ctrl */
 382
 383 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 384 {
 385     size_t len;
 386
 387     len = strlen(str);
 388     if (len > INT_MAX)
 389         return -1;
 390     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 391 }
 392
 393 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 394 {
 395     unsigned char *bin;
 396     long binlen;
 397     int rv = -1;
 398
 399     bin = OPENSSL_hexstr2buf(hex, &binlen);
 400     if (bin == NULL)
 401         return 0;
 402     if (binlen <= INT_MAX)
 403         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 404     OPENSSL_free(bin);
 405     return rv;
 406 }
 407
 408 /* Pass a message digest to a ctrl */
 409 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
 410 {
 411     const EVP_MD *m;
 412
 413     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
 414         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
 415         return 0;
 416     }
 417     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
 418 }
 419
 420 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 421 {
 422     return ctx->operation;
 423 }
 424
 425 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 426 {
 427     ctx->keygen_info = dat;
 428     ctx->keygen_info_count = datlen;
 429 }
 430
 431 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 432 {
 433     ctx->data = data;
 434 }
 435
 436 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 437 {
 438     return ctx->data;
 439 }
 440
 441 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 442 {
 443     return ctx->pkey;
 444 }
 445
 446 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 447 {
 448     return ctx->peerkey;
 449 }
 450
 451 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 452 {
 453     ctx->app_data = data;
 454 }
 455
 456 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 457 {
 458     return ctx->app_data;
 459 }
 460
 461 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 462                             int (*init) (EVP_PKEY_CTX *ctx))
 463 {
 464     pmeth->init = init;
 465 }
 466
 467 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 468                             int (*copy) (EVP_PKEY_CTX *dst,
 469                                          EVP_PKEY_CTX *src))
 470 {
 471     pmeth->copy = copy;
 472 }
 473
 474 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 475                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 476 {
 477     pmeth->cleanup = cleanup;
 478 }
 479
 480 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 481                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 482                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 483                                                  EVP_PKEY *pkey))
 484 {
 485     pmeth->paramgen_init = paramgen_init;
 486     pmeth->paramgen = paramgen;
 487 }
 488
 489 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 490                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 491                               int (*keygen) (EVP_PKEY_CTX *ctx,
 492                                              EVP_PKEY *pkey))
 493 {
 494     pmeth->keygen_init = keygen_init;
 495     pmeth->keygen = keygen;
 496 }
 497
 498 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 499                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 500                             int (*sign) (EVP_PKEY_CTX *ctx,
 501                                          unsigned char *sig, size_t *siglen,
 502                                          const unsigned char *tbs,
 503                                          size_t tbslen))
 504 {
 505     pmeth->sign_init = sign_init;
 506     pmeth->sign = sign;
 507 }
 508
 509 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 510                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 511                               int (*verify) (EVP_PKEY_CTX *ctx,
 512                                              const unsigned char *sig,
 513                                              size_t siglen,
 514                                              const unsigned char *tbs,
 515                                              size_t tbslen))
 516 {
 517     pmeth->verify_init = verify_init;
 518     pmeth->verify = verify;
 519 }
 520
 521 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 522                                       int (*verify_recover_init) (EVP_PKEY_CTX
 523                                                                   *ctx),
 524                                       int (*verify_recover) (EVP_PKEY_CTX
 525                                                              *ctx,
 526                                                              unsigned char
 527                                                              *sig,
 528                                                              size_t *siglen,
 529                                                              const unsigned
 530                                                              char *tbs,
 531                                                              size_t tbslen))
 532 {
 533     pmeth->verify_recover_init = verify_recover_init;
 534     pmeth->verify_recover = verify_recover;
 535 }
 536
 537 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 538                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 539                                                     EVP_MD_CTX *mctx),
 540                                int (*signctx) (EVP_PKEY_CTX *ctx,
 541                                                unsigned char *sig,
 542                                                size_t *siglen,
 543                                                EVP_MD_CTX *mctx))
 544 {
 545     pmeth->signctx_init = signctx_init;
 546     pmeth->signctx = signctx;
 547 }
 548
 549 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 550                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 551                                                         EVP_MD_CTX *mctx),
 552                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 553                                                    const unsigned char *sig,
 554                                                    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,
 564                                                  unsigned char *out,
 565                                                  size_t *outlen,
 566                                                  const unsigned char *in,
 567                                                  size_t inlen))
 568 {
 569     pmeth->encrypt_init = encrypt_init;
 570     pmeth->encrypt = encryptfn;
 571 }
 572
 573 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 574                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 575                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 576                                                unsigned char *out,
 577                                                size_t *outlen,
 578                                                const unsigned char *in,
 579                                                size_t inlen))
 580 {
 581     pmeth->decrypt_init = decrypt_init;
 582     pmeth->decrypt = decrypt;
 583 }
 584
 585 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 586                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 587                               int (*derive) (EVP_PKEY_CTX *ctx,
 588                                              unsigned char *key,
 589                                              size_t *keylen))
 590 {
 591     pmeth->derive_init = derive_init;
 592     pmeth->derive = derive;
 593 }
 594
 595 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 596                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 597                                          void *p2),
 598                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 599                                              const char *type,
 600                                              const char *value))
 601 {
 602     pmeth->ctrl = ctrl;
 603     pmeth->ctrl_str = ctrl_str;
 604 }
 605
 606 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
 607                             int (**pinit) (EVP_PKEY_CTX *ctx))
 608 {
 609     *pinit = pmeth->init;
 610 }
 611
 612 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
 613                             int (**pcopy) (EVP_PKEY_CTX *dst,
 614                                            EVP_PKEY_CTX *src))
 615 {
 616     *pcopy = pmeth->copy;
 617 }
 618
 619 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
 620                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 621 {
 622     *pcleanup = pmeth->cleanup;
 623 }
 624
 625 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
 626                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 627                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 628                                                    EVP_PKEY *pkey))
 629 {
 630     if (pparamgen_init)
 631         *pparamgen_init = pmeth->paramgen_init;
 632     if (pparamgen)
 633         *pparamgen = pmeth->paramgen;
 634 }
 635
 636 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
 637                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 638                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 639                                                EVP_PKEY *pkey))
 640 {
 641     if (pkeygen_init)
 642         *pkeygen_init = pmeth->keygen_init;
 643     if (pkeygen)
 644         *pkeygen = pmeth->keygen;
 645 }
 646
 647 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
 648                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 649                             int (**psign) (EVP_PKEY_CTX *ctx,
 650                                            unsigned char *sig, size_t *siglen,
 651                                            const unsigned char *tbs,
 652                                            size_t tbslen))
 653 {
 654     if (psign_init)
 655         *psign_init = pmeth->sign_init;
 656     if (psign)
 657         *psign = pmeth->sign;
 658 }
 659
 660 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
 661                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 662                               int (**pverify) (EVP_PKEY_CTX *ctx,
 663                                                const unsigned char *sig,
 664                                                size_t siglen,
 665                                                const unsigned char *tbs,
 666                                                size_t tbslen))
 667 {
 668     if (pverify_init)
 669         *pverify_init = pmeth->verify_init;
 670     if (pverify)
 671         *pverify = pmeth->verify;
 672 }
 673
 674 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
 675                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 676                                                                     *ctx),
 677                                       int (**pverify_recover) (EVP_PKEY_CTX
 678                                                                *ctx,
 679                                                                unsigned char
 680                                                                *sig,
 681                                                                size_t *siglen,
 682                                                                const unsigned
 683                                                                char *tbs,
 684                                                                size_t tbslen))
 685 {
 686     if (pverify_recover_init)
 687         *pverify_recover_init = pmeth->verify_recover_init;
 688     if (pverify_recover)
 689         *pverify_recover = pmeth->verify_recover;
 690 }
 691
 692 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
 693                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 694                                                       EVP_MD_CTX *mctx),
 695                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 696                                                  unsigned char *sig,
 697                                                  size_t *siglen,
 698                                                  EVP_MD_CTX *mctx))
 699 {
 700     if (psignctx_init)
 701         *psignctx_init = pmeth->signctx_init;
 702     if (psignctx)
 703         *psignctx = pmeth->signctx;
 704 }
 705
 706 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
 707                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 708                                                           EVP_MD_CTX *mctx),
 709                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 710                                                      const unsigned char *sig,
 711                                                      int siglen,
 712                                                      EVP_MD_CTX *mctx))
 713 {
 714     if (pverifyctx_init)
 715         *pverifyctx_init = pmeth->verifyctx_init;
 716     if (pverifyctx)
 717         *pverifyctx = pmeth->verifyctx;
 718 }
 719
 720 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
 721                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 722                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 723                                                    unsigned char *out,
 724                                                    size_t *outlen,
 725                                                    const unsigned char *in,
 726                                                    size_t inlen))
 727 {
 728     if (pencrypt_init)
 729         *pencrypt_init = pmeth->encrypt_init;
 730     if (pencryptfn)
 731         *pencryptfn = pmeth->encrypt;
 732 }
 733
 734 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
 735                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 736                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 737                                                  unsigned char *out,
 738                                                  size_t *outlen,
 739                                                  const unsigned char *in,
 740                                                  size_t inlen))
 741 {
 742     if (pdecrypt_init)
 743         *pdecrypt_init = pmeth->decrypt_init;
 744     if (pdecrypt)
 745         *pdecrypt = pmeth->decrypt;
 746 }
 747
 748 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
 749                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 750                               int (**pderive) (EVP_PKEY_CTX *ctx,
 751                                                unsigned char *key,
 752                                                size_t *keylen))
 753 {
 754     if (pderive_init)
 755         *pderive_init = pmeth->derive_init;
 756     if (pderive)
 757         *pderive = pmeth->derive;
 758 }
 759
 760 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
 761                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 762                                            void *p2),
 763                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 764                                                const char *type,
 765                                                const char *value))
 766 {
 767     if (pctrl)
 768         *pctrl = pmeth->ctrl;
 769     if (pctrl_str)
 770         *pctrl_str = pmeth->ctrl_str;
 771 }