crypto/evp/pmeth_lib.c

   1 /*
   2  * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 #include "evp_locl.h"
  20
  21 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  22
  23 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  24
  25 /* This array needs to be in order of NIDs */
  26 static const EVP_PKEY_METHOD *standard_methods[] = {
  27 #ifndef OPENSSL_NO_RSA
  28     &rsa_pkey_meth,
  29 #endif
  30 #ifndef OPENSSL_NO_DH
  31     &dh_pkey_meth,
  32 #endif
  33 #ifndef OPENSSL_NO_DSA
  34     &dsa_pkey_meth,
  35 #endif
  36 #ifndef OPENSSL_NO_EC
  37     &ec_pkey_meth,
  38 #endif
  39     &hmac_pkey_meth,
  40 #ifndef OPENSSL_NO_CMAC
  41     &cmac_pkey_meth,
  42 #endif
  43 #ifndef OPENSSL_NO_RSA
  44     &rsa_pss_pkey_meth,
  45 #endif
  46 #ifndef OPENSSL_NO_DH
  47     &dhx_pkey_meth,
  48 #endif
  49 #ifndef OPENSSL_NO_SCRYPT
  50     &scrypt_pkey_meth,
  51 #endif
  52     &tls1_prf_pkey_meth,
  53 #ifndef OPENSSL_NO_EC
  54     &ecx25519_pkey_meth,
  55     &ecx448_pkey_meth,
  56 #endif
  57     &hkdf_pkey_meth,
  58 #ifndef OPENSSL_NO_POLY1305
  59     &poly1305_pkey_meth,
  60 #endif
  61 #ifndef OPENSSL_NO_SIPHASH
  62     &siphash_pkey_meth,
  63 #endif
  64 #ifndef OPENSSL_NO_EC
  65     &ed25519_pkey_meth,
  66     &ed448_pkey_meth,
  67 #endif
  68 #ifndef OPENSSL_NO_SM2
  69     &sm2_pkey_meth,
  70 #endif
  71 };
  72
  73 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  74                            pmeth);
  75
  76 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
  77                      const EVP_PKEY_METHOD *const *b)
  78 {
  79     return ((*a)->pkey_id - (*b)->pkey_id);
  80 }
  81
  82 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  83                              pmeth);
  84
  85 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
  86 {
  87     EVP_PKEY_METHOD tmp;
  88     const EVP_PKEY_METHOD *t = &tmp, **ret;
  89     tmp.pkey_id = type;
  90     if (app_pkey_methods) {
  91         int idx;
  92         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
  93         if (idx >= 0)
  94             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
  95     }
  96     ret = OBJ_bsearch_pmeth(&t, standard_methods,
  97                             sizeof(standard_methods) /
  98                             sizeof(EVP_PKEY_METHOD *));
  99     if (!ret || !*ret)
 100         return NULL;
 101     return *ret;
 102 }
 103
 104 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
 105 {
 106     EVP_PKEY_CTX *ret;
 107     const EVP_PKEY_METHOD *pmeth;
 108
 109     if (id == -1) {
 110         if (pkey == NULL)
 111             return 0;
 112         id = pkey->type;
 113     }
 114 #ifndef OPENSSL_NO_ENGINE
 115     if (e == NULL && pkey != NULL)
 116         e = pkey->pmeth_engine != NULL ? pkey->pmeth_engine : pkey->engine;
 117     /* Try to find an ENGINE which implements this method */
 118     if (e) {
 119         if (!ENGINE_init(e)) {
 120             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 121             return NULL;
 122         }
 123     } else {
 124         e = ENGINE_get_pkey_meth_engine(id);
 125     }
 126
 127     /*
 128      * If an ENGINE handled this method look it up. Otherwise use internal
 129      * tables.
 130      */
 131     if (e)
 132         pmeth = ENGINE_get_pkey_meth(e, id);
 133     else
 134 #endif
 135         pmeth = EVP_PKEY_meth_find(id);
 136
 137     if (pmeth == NULL) {
 138 #ifndef OPENSSL_NO_ENGINE
 139         ENGINE_finish(e);
 140 #endif
 141         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 142         return NULL;
 143     }
 144
 145     ret = OPENSSL_zalloc(sizeof(*ret));
 146     if (ret == NULL) {
 147 #ifndef OPENSSL_NO_ENGINE
 148         ENGINE_finish(e);
 149 #endif
 150         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 151         return NULL;
 152     }
 153     ret->engine = e;
 154     ret->pmeth = pmeth;
 155     ret->operation = EVP_PKEY_OP_UNDEFINED;
 156     ret->pkey = pkey;
 157     if (pkey != NULL)
 158         EVP_PKEY_up_ref(pkey);
 159
 160     if (pmeth->init) {
 161         if (pmeth->init(ret) <= 0) {
 162             ret->pmeth = NULL;
 163             EVP_PKEY_CTX_free(ret);
 164             return NULL;
 165         }
 166     }
 167
 168     return ret;
 169 }
 170
 171 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 172 {
 173     EVP_PKEY_METHOD *pmeth;
 174
 175     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 176     if (pmeth == NULL) {
 177         EVPerr(EVP_F_EVP_PKEY_METH_NEW, ERR_R_MALLOC_FAILURE);
 178         return NULL;
 179     }
 180
 181     pmeth->pkey_id = id;
 182     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 183     return pmeth;
 184 }
 185
 186 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 187                              const EVP_PKEY_METHOD *meth)
 188 {
 189     if (ppkey_id)
 190         *ppkey_id = meth->pkey_id;
 191     if (pflags)
 192         *pflags = meth->flags;
 193 }
 194
 195 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 196 {
 197
 198     dst->init = src->init;
 199     dst->copy = src->copy;
 200     dst->cleanup = src->cleanup;
 201
 202     dst->paramgen_init = src->paramgen_init;
 203     dst->paramgen = src->paramgen;
 204
 205     dst->keygen_init = src->keygen_init;
 206     dst->keygen = src->keygen;
 207
 208     dst->sign_init = src->sign_init;
 209     dst->sign = src->sign;
 210
 211     dst->verify_init = src->verify_init;
 212     dst->verify = src->verify;
 213
 214     dst->verify_recover_init = src->verify_recover_init;
 215     dst->verify_recover = src->verify_recover;
 216
 217     dst->signctx_init = src->signctx_init;
 218     dst->signctx = src->signctx;
 219
 220     dst->verifyctx_init = src->verifyctx_init;
 221     dst->verifyctx = src->verifyctx;
 222
 223     dst->encrypt_init = src->encrypt_init;
 224     dst->encrypt = src->encrypt;
 225
 226     dst->decrypt_init = src->decrypt_init;
 227     dst->decrypt = src->decrypt;
 228
 229     dst->derive_init = src->derive_init;
 230     dst->derive = src->derive;
 231
 232     dst->ctrl = src->ctrl;
 233     dst->ctrl_str = src->ctrl_str;
 234
 235     dst->check = src->check;
 236 }
 237
 238 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 239 {
 240     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 241         OPENSSL_free(pmeth);
 242 }
 243
 244 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 245 {
 246     return int_ctx_new(pkey, e, -1);
 247 }
 248
 249 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 250 {
 251     return int_ctx_new(NULL, e, id);
 252 }
 253
 254 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(const EVP_PKEY_CTX *pctx)
 255 {
 256     EVP_PKEY_CTX *rctx;
 257
 258     if (((pctx->pmeth == NULL) || (pctx->pmeth->copy == NULL))
 259             && pctx->exchprovctx == NULL)
 260         return NULL;
 261 #ifndef OPENSSL_NO_ENGINE
 262     /* Make sure it's safe to copy a pkey context using an ENGINE */
 263     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 264         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 265         return 0;
 266     }
 267 #endif
 268     rctx = OPENSSL_zalloc(sizeof(*rctx));
 269     if (rctx == NULL) {
 270         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_MALLOC_FAILURE);
 271         return NULL;
 272     }
 273
 274     if (pctx->pkey != NULL)
 275         EVP_PKEY_up_ref(pctx->pkey);
 276     rctx->pkey = pctx->pkey;
 277     rctx->operation = pctx->operation;
 278
 279     if (pctx->exchprovctx != NULL) {
 280         if (!ossl_assert(pctx->exchange != NULL))
 281             return NULL;
 282         rctx->exchange = pctx->exchange;
 283         if (!EVP_KEYEXCH_up_ref(rctx->exchange)) {
 284             OPENSSL_free(rctx);
 285             return NULL;
 286         }
 287         rctx->exchprovctx = pctx->exchange->dupctx(pctx->exchprovctx);
 288         if (rctx->exchprovctx == NULL) {
 289             EVP_KEYEXCH_free(rctx->exchange);
 290             OPENSSL_free(rctx);
 291             return NULL;
 292         }
 293         return rctx;
 294     }
 295
 296     rctx->pmeth = pctx->pmeth;
 297 #ifndef OPENSSL_NO_ENGINE
 298     rctx->engine = pctx->engine;
 299 #endif
 300
 301     if (pctx->peerkey)
 302         EVP_PKEY_up_ref(pctx->peerkey);
 303     rctx->peerkey = pctx->peerkey;
 304
 305     if (pctx->pmeth->copy(rctx, pctx) > 0)
 306         return rctx;
 307
 308     rctx->pmeth = NULL;
 309     EVP_PKEY_CTX_free(rctx);
 310     return NULL;
 311
 312 }
 313
 314 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 315 {
 316     if (app_pkey_methods == NULL) {
 317         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 318         if (app_pkey_methods == NULL){
 319             EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 320             return 0;
 321         }
 322     }
 323     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth)) {
 324         EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 325         return 0;
 326     }
 327     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 328     return 1;
 329 }
 330
 331 void evp_app_cleanup_int(void)
 332 {
 333     if (app_pkey_methods != NULL)
 334         sk_EVP_PKEY_METHOD_pop_free(app_pkey_methods, EVP_PKEY_meth_free);
 335 }
 336
 337 int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth)
 338 {
 339     const EVP_PKEY_METHOD *ret;
 340
 341     ret = sk_EVP_PKEY_METHOD_delete_ptr(app_pkey_methods, pmeth);
 342
 343     return ret == NULL ? 0 : 1;
 344 }
 345
 346 size_t EVP_PKEY_meth_get_count(void)
 347 {
 348     size_t rv = OSSL_NELEM(standard_methods);
 349
 350     if (app_pkey_methods)
 351         rv += sk_EVP_PKEY_METHOD_num(app_pkey_methods);
 352     return rv;
 353 }
 354
 355 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx)
 356 {
 357     if (idx < OSSL_NELEM(standard_methods))
 358         return standard_methods[idx];
 359     if (app_pkey_methods == NULL)
 360         return NULL;
 361     idx -= OSSL_NELEM(standard_methods);
 362     if (idx >= (size_t)sk_EVP_PKEY_METHOD_num(app_pkey_methods))
 363         return NULL;
 364     return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 365 }
 366
 367 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 368 {
 369     if (ctx == NULL)
 370         return;
 371     if (ctx->pmeth && ctx->pmeth->cleanup)
 372         ctx->pmeth->cleanup(ctx);
 373
 374     if (ctx->exchprovctx != NULL && ctx->exchange != NULL)
 375         ctx->exchange->freectx(ctx->exchprovctx);
 376
 377     EVP_KEYEXCH_free(ctx->exchange);
 378
 379     EVP_PKEY_free(ctx->pkey);
 380     EVP_PKEY_free(ctx->peerkey);
 381 #ifndef OPENSSL_NO_ENGINE
 382     ENGINE_finish(ctx->engine);
 383 #endif
 384     OPENSSL_free(ctx);
 385 }
 386
 387 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 388                       int cmd, int p1, void *p2)
 389 {
 390     int ret;
 391
 392     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 393         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 394         return -2;
 395     }
 396     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 397         return -1;
 398
 399     /* Skip the operation checks since this is called in a very early stage */
 400     if (ctx->pmeth->digest_custom != NULL)
 401         goto doit;
 402
 403     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 404         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 405         return -1;
 406     }
 407
 408     if ((optype != -1) && !(ctx->operation & optype)) {
 409         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 410         return -1;
 411     }
 412
 413  doit:
 414     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 415
 416     if (ret == -2)
 417         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 418
 419     return ret;
 420 }
 421
 422 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 423                              int cmd, uint64_t value)
 424 {
 425     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 426 }
 427
 428 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 429                           const char *name, const char *value)
 430 {
 431     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 432         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 433         return -2;
 434     }
 435     if (strcmp(name, "digest") == 0)
 436         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
 437                                value);
 438     return ctx->pmeth->ctrl_str(ctx, name, value);
 439 }
 440
 441 /* Utility functions to send a string of hex string to a ctrl */
 442
 443 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 444 {
 445     size_t len;
 446
 447     len = strlen(str);
 448     if (len > INT_MAX)
 449         return -1;
 450     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 451 }
 452
 453 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 454 {
 455     unsigned char *bin;
 456     long binlen;
 457     int rv = -1;
 458
 459     bin = OPENSSL_hexstr2buf(hex, &binlen);
 460     if (bin == NULL)
 461         return 0;
 462     if (binlen <= INT_MAX)
 463         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 464     OPENSSL_free(bin);
 465     return rv;
 466 }
 467
 468 /* Pass a message digest to a ctrl */
 469 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
 470 {
 471     const EVP_MD *m;
 472
 473     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
 474         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
 475         return 0;
 476     }
 477     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
 478 }
 479
 480 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 481 {
 482     return ctx->operation;
 483 }
 484
 485 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 486 {
 487     ctx->keygen_info = dat;
 488     ctx->keygen_info_count = datlen;
 489 }
 490
 491 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 492 {
 493     ctx->data = data;
 494 }
 495
 496 void *EVP_PKEY_CTX_get_data(const EVP_PKEY_CTX *ctx)
 497 {
 498     return ctx->data;
 499 }
 500
 501 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 502 {
 503     return ctx->pkey;
 504 }
 505
 506 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 507 {
 508     return ctx->peerkey;
 509 }
 510
 511 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 512 {
 513     ctx->app_data = data;
 514 }
 515
 516 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 517 {
 518     return ctx->app_data;
 519 }
 520
 521 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 522                             int (*init) (EVP_PKEY_CTX *ctx))
 523 {
 524     pmeth->init = init;
 525 }
 526
 527 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 528                             int (*copy) (EVP_PKEY_CTX *dst,
 529                                          const EVP_PKEY_CTX *src))
 530 {
 531     pmeth->copy = copy;
 532 }
 533
 534 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 535                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 536 {
 537     pmeth->cleanup = cleanup;
 538 }
 539
 540 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 541                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 542                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 543                                                  EVP_PKEY *pkey))
 544 {
 545     pmeth->paramgen_init = paramgen_init;
 546     pmeth->paramgen = paramgen;
 547 }
 548
 549 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 550                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 551                               int (*keygen) (EVP_PKEY_CTX *ctx,
 552                                              EVP_PKEY *pkey))
 553 {
 554     pmeth->keygen_init = keygen_init;
 555     pmeth->keygen = keygen;
 556 }
 557
 558 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 559                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 560                             int (*sign) (EVP_PKEY_CTX *ctx,
 561                                          unsigned char *sig, size_t *siglen,
 562                                          const unsigned char *tbs,
 563                                          size_t tbslen))
 564 {
 565     pmeth->sign_init = sign_init;
 566     pmeth->sign = sign;
 567 }
 568
 569 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 570                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 571                               int (*verify) (EVP_PKEY_CTX *ctx,
 572                                              const unsigned char *sig,
 573                                              size_t siglen,
 574                                              const unsigned char *tbs,
 575                                              size_t tbslen))
 576 {
 577     pmeth->verify_init = verify_init;
 578     pmeth->verify = verify;
 579 }
 580
 581 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 582                                       int (*verify_recover_init) (EVP_PKEY_CTX
 583                                                                   *ctx),
 584                                       int (*verify_recover) (EVP_PKEY_CTX
 585                                                              *ctx,
 586                                                              unsigned char
 587                                                              *sig,
 588                                                              size_t *siglen,
 589                                                              const unsigned
 590                                                              char *tbs,
 591                                                              size_t tbslen))
 592 {
 593     pmeth->verify_recover_init = verify_recover_init;
 594     pmeth->verify_recover = verify_recover;
 595 }
 596
 597 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 598                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 599                                                     EVP_MD_CTX *mctx),
 600                                int (*signctx) (EVP_PKEY_CTX *ctx,
 601                                                unsigned char *sig,
 602                                                size_t *siglen,
 603                                                EVP_MD_CTX *mctx))
 604 {
 605     pmeth->signctx_init = signctx_init;
 606     pmeth->signctx = signctx;
 607 }
 608
 609 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 610                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 611                                                         EVP_MD_CTX *mctx),
 612                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 613                                                    const unsigned char *sig,
 614                                                    int siglen,
 615                                                    EVP_MD_CTX *mctx))
 616 {
 617     pmeth->verifyctx_init = verifyctx_init;
 618     pmeth->verifyctx = verifyctx;
 619 }
 620
 621 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 622                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 623                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 624                                                  unsigned char *out,
 625                                                  size_t *outlen,
 626                                                  const unsigned char *in,
 627                                                  size_t inlen))
 628 {
 629     pmeth->encrypt_init = encrypt_init;
 630     pmeth->encrypt = encryptfn;
 631 }
 632
 633 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 634                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 635                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 636                                                unsigned char *out,
 637                                                size_t *outlen,
 638                                                const unsigned char *in,
 639                                                size_t inlen))
 640 {
 641     pmeth->decrypt_init = decrypt_init;
 642     pmeth->decrypt = decrypt;
 643 }
 644
 645 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 646                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 647                               int (*derive) (EVP_PKEY_CTX *ctx,
 648                                              unsigned char *key,
 649                                              size_t *keylen))
 650 {
 651     pmeth->derive_init = derive_init;
 652     pmeth->derive = derive;
 653 }
 654
 655 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 656                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 657                                          void *p2),
 658                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 659                                              const char *type,
 660                                              const char *value))
 661 {
 662     pmeth->ctrl = ctrl;
 663     pmeth->ctrl_str = ctrl_str;
 664 }
 665
 666 void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
 667                              int (*check) (EVP_PKEY *pkey))
 668 {
 669     pmeth->check = check;
 670 }
 671
 672 void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
 673                                     int (*check) (EVP_PKEY *pkey))
 674 {
 675     pmeth->public_check = check;
 676 }
 677
 678 void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
 679                                    int (*check) (EVP_PKEY *pkey))
 680 {
 681     pmeth->param_check = check;
 682 }
 683
 684 void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
 685                                      int (*digest_custom) (EVP_PKEY_CTX *ctx,
 686                                                            EVP_MD_CTX *mctx))
 687 {
 688     pmeth->digest_custom = digest_custom;
 689 }
 690
 691 void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
 692                             int (**pinit) (EVP_PKEY_CTX *ctx))
 693 {
 694     *pinit = pmeth->init;
 695 }
 696
 697 void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
 698                             int (**pcopy) (EVP_PKEY_CTX *dst,
 699                                            const EVP_PKEY_CTX *src))
 700 {
 701     *pcopy = pmeth->copy;
 702 }
 703
 704 void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
 705                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 706 {
 707     *pcleanup = pmeth->cleanup;
 708 }
 709
 710 void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
 711                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 712                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 713                                                    EVP_PKEY *pkey))
 714 {
 715     if (pparamgen_init)
 716         *pparamgen_init = pmeth->paramgen_init;
 717     if (pparamgen)
 718         *pparamgen = pmeth->paramgen;
 719 }
 720
 721 void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
 722                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 723                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 724                                                EVP_PKEY *pkey))
 725 {
 726     if (pkeygen_init)
 727         *pkeygen_init = pmeth->keygen_init;
 728     if (pkeygen)
 729         *pkeygen = pmeth->keygen;
 730 }
 731
 732 void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
 733                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 734                             int (**psign) (EVP_PKEY_CTX *ctx,
 735                                            unsigned char *sig, size_t *siglen,
 736                                            const unsigned char *tbs,
 737                                            size_t tbslen))
 738 {
 739     if (psign_init)
 740         *psign_init = pmeth->sign_init;
 741     if (psign)
 742         *psign = pmeth->sign;
 743 }
 744
 745 void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
 746                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 747                               int (**pverify) (EVP_PKEY_CTX *ctx,
 748                                                const unsigned char *sig,
 749                                                size_t siglen,
 750                                                const unsigned char *tbs,
 751                                                size_t tbslen))
 752 {
 753     if (pverify_init)
 754         *pverify_init = pmeth->verify_init;
 755     if (pverify)
 756         *pverify = pmeth->verify;
 757 }
 758
 759 void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
 760                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 761                                                                     *ctx),
 762                                       int (**pverify_recover) (EVP_PKEY_CTX
 763                                                                *ctx,
 764                                                                unsigned char
 765                                                                *sig,
 766                                                                size_t *siglen,
 767                                                                const unsigned
 768                                                                char *tbs,
 769                                                                size_t tbslen))
 770 {
 771     if (pverify_recover_init)
 772         *pverify_recover_init = pmeth->verify_recover_init;
 773     if (pverify_recover)
 774         *pverify_recover = pmeth->verify_recover;
 775 }
 776
 777 void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
 778                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 779                                                       EVP_MD_CTX *mctx),
 780                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 781                                                  unsigned char *sig,
 782                                                  size_t *siglen,
 783                                                  EVP_MD_CTX *mctx))
 784 {
 785     if (psignctx_init)
 786         *psignctx_init = pmeth->signctx_init;
 787     if (psignctx)
 788         *psignctx = pmeth->signctx;
 789 }
 790
 791 void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
 792                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 793                                                           EVP_MD_CTX *mctx),
 794                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 795                                                      const unsigned char *sig,
 796                                                      int siglen,
 797                                                      EVP_MD_CTX *mctx))
 798 {
 799     if (pverifyctx_init)
 800         *pverifyctx_init = pmeth->verifyctx_init;
 801     if (pverifyctx)
 802         *pverifyctx = pmeth->verifyctx;
 803 }
 804
 805 void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
 806                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 807                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 808                                                    unsigned char *out,
 809                                                    size_t *outlen,
 810                                                    const unsigned char *in,
 811                                                    size_t inlen))
 812 {
 813     if (pencrypt_init)
 814         *pencrypt_init = pmeth->encrypt_init;
 815     if (pencryptfn)
 816         *pencryptfn = pmeth->encrypt;
 817 }
 818
 819 void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
 820                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 821                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 822                                                  unsigned char *out,
 823                                                  size_t *outlen,
 824                                                  const unsigned char *in,
 825                                                  size_t inlen))
 826 {
 827     if (pdecrypt_init)
 828         *pdecrypt_init = pmeth->decrypt_init;
 829     if (pdecrypt)
 830         *pdecrypt = pmeth->decrypt;
 831 }
 832
 833 void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
 834                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 835                               int (**pderive) (EVP_PKEY_CTX *ctx,
 836                                                unsigned char *key,
 837                                                size_t *keylen))
 838 {
 839     if (pderive_init)
 840         *pderive_init = pmeth->derive_init;
 841     if (pderive)
 842         *pderive = pmeth->derive;
 843 }
 844
 845 void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
 846                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 847                                            void *p2),
 848                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 849                                                const char *type,
 850                                                const char *value))
 851 {
 852     if (pctrl)
 853         *pctrl = pmeth->ctrl;
 854     if (pctrl_str)
 855         *pctrl_str = pmeth->ctrl_str;
 856 }
 857
 858 void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
 859                              int (**pcheck) (EVP_PKEY *pkey))
 860 {
 861     if (pcheck != NULL)
 862         *pcheck = pmeth->check;
 863 }
 864
 865 void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
 866                                     int (**pcheck) (EVP_PKEY *pkey))
 867 {
 868     if (pcheck != NULL)
 869         *pcheck = pmeth->public_check;
 870 }
 871
 872 void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
 873                                    int (**pcheck) (EVP_PKEY *pkey))
 874 {
 875     if (pcheck != NULL)
 876         *pcheck = pmeth->param_check;
 877 }
 878
 879 void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
 880                                      int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
 881                                                              EVP_MD_CTX *mctx))
 882 {
 883     if (pdigest_custom != NULL)
 884         *pdigest_custom = pmeth->digest_custom;
 885 }