crypto/evp/pmeth_lib.c

   1 /*
   2  * Copyright 2006-2016 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 static const EVP_PKEY_METHOD *standard_methods[] = {
  25 #ifndef OPENSSL_NO_RSA
  26     &rsa_pkey_meth,
  27 #endif
  28 #ifndef OPENSSL_NO_DH
  29     &dh_pkey_meth,
  30 #endif
  31 #ifndef OPENSSL_NO_DSA
  32     &dsa_pkey_meth,
  33 #endif
  34 #ifndef OPENSSL_NO_EC
  35     &ec_pkey_meth,
  36 #endif
  37     &hmac_pkey_meth,
  38 #ifndef OPENSSL_NO_CMAC
  39     &cmac_pkey_meth,
  40 #endif
  41 #ifndef OPENSSL_NO_DH
  42     &dhx_pkey_meth,
  43 #endif
  44     &tls1_prf_pkey_meth,
  45 #ifndef OPENSSL_NO_EC
  46     &ecx25519_pkey_meth,
  47 #endif
  48     &hkdf_pkey_meth
  49 };
  50
  51 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  52                            pmeth);
  53
  54 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
  55                      const EVP_PKEY_METHOD *const *b)
  56 {
  57     return ((*a)->pkey_id - (*b)->pkey_id);
  58 }
  59
  60 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  61                              pmeth);
  62
  63 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
  64 {
  65     EVP_PKEY_METHOD tmp;
  66     const EVP_PKEY_METHOD *t = &tmp, **ret;
  67     tmp.pkey_id = type;
  68     if (app_pkey_methods) {
  69         int idx;
  70         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
  71         if (idx >= 0)
  72             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
  73     }
  74     ret = OBJ_bsearch_pmeth(&t, standard_methods,
  75                             sizeof(standard_methods) /
  76                             sizeof(EVP_PKEY_METHOD *));
  77     if (!ret || !*ret)
  78         return NULL;
  79     return *ret;
  80 }
  81
  82 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
  83 {
  84     EVP_PKEY_CTX *ret;
  85     const EVP_PKEY_METHOD *pmeth;
  86     if (id == -1) {
  87         if (!pkey || !pkey->ameth)
  88             return NULL;
  89         id = pkey->ameth->pkey_id;
  90     }
  91 #ifndef OPENSSL_NO_ENGINE
  92     if (pkey && pkey->engine)
  93         e = pkey->engine;
  94     /* Try to find an ENGINE which implements this method */
  95     if (e) {
  96         if (!ENGINE_init(e)) {
  97             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
  98             return NULL;
  99         }
 100     } else
 101         e = ENGINE_get_pkey_meth_engine(id);
 102
 103     /*
 104      * If an ENGINE handled this method look it up. Otherwise use internal
 105      * tables.
 106      */
 107
 108     if (e)
 109         pmeth = ENGINE_get_pkey_meth(e, id);
 110     else
 111 #endif
 112         pmeth = EVP_PKEY_meth_find(id);
 113
 114     if (pmeth == NULL) {
 115         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 116         return NULL;
 117     }
 118
 119     ret = OPENSSL_zalloc(sizeof(*ret));
 120     if (ret == NULL) {
 121 #ifndef OPENSSL_NO_ENGINE
 122         ENGINE_finish(e);
 123 #endif
 124         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 125         return NULL;
 126     }
 127     ret->engine = e;
 128     ret->pmeth = pmeth;
 129     ret->operation = EVP_PKEY_OP_UNDEFINED;
 130     ret->pkey = pkey;
 131     if (pkey)
 132         EVP_PKEY_up_ref(pkey);
 133
 134     if (pmeth->init) {
 135         if (pmeth->init(ret) <= 0) {
 136             EVP_PKEY_CTX_free(ret);
 137             return NULL;
 138         }
 139     }
 140
 141     return ret;
 142 }
 143
 144 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 145 {
 146     EVP_PKEY_METHOD *pmeth;
 147
 148     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 149     if (pmeth == NULL)
 150         return NULL;
 151
 152     pmeth->pkey_id = id;
 153     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 154     return pmeth;
 155 }
 156
 157 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 158                              const EVP_PKEY_METHOD *meth)
 159 {
 160     if (ppkey_id)
 161         *ppkey_id = meth->pkey_id;
 162     if (pflags)
 163         *pflags = meth->flags;
 164 }
 165
 166 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 167 {
 168
 169     dst->init = src->init;
 170     dst->copy = src->copy;
 171     dst->cleanup = src->cleanup;
 172
 173     dst->paramgen_init = src->paramgen_init;
 174     dst->paramgen = src->paramgen;
 175
 176     dst->keygen_init = src->keygen_init;
 177     dst->keygen = src->keygen;
 178
 179     dst->sign_init = src->sign_init;
 180     dst->sign = src->sign;
 181
 182     dst->verify_init = src->verify_init;
 183     dst->verify = src->verify;
 184
 185     dst->verify_recover_init = src->verify_recover_init;
 186     dst->verify_recover = src->verify_recover;
 187
 188     dst->signctx_init = src->signctx_init;
 189     dst->signctx = src->signctx;
 190
 191     dst->verifyctx_init = src->verifyctx_init;
 192     dst->verifyctx = src->verifyctx;
 193
 194     dst->encrypt_init = src->encrypt_init;
 195     dst->encrypt = src->encrypt;
 196
 197     dst->decrypt_init = src->decrypt_init;
 198     dst->decrypt = src->decrypt;
 199
 200     dst->derive_init = src->derive_init;
 201     dst->derive = src->derive;
 202
 203     dst->ctrl = src->ctrl;
 204     dst->ctrl_str = src->ctrl_str;
 205 }
 206
 207 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 208 {
 209     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 210         OPENSSL_free(pmeth);
 211 }
 212
 213 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 214 {
 215     return int_ctx_new(pkey, e, -1);
 216 }
 217
 218 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 219 {
 220     return int_ctx_new(NULL, e, id);
 221 }
 222
 223 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
 224 {
 225     EVP_PKEY_CTX *rctx;
 226     if (!pctx->pmeth || !pctx->pmeth->copy)
 227         return NULL;
 228 #ifndef OPENSSL_NO_ENGINE
 229     /* Make sure it's safe to copy a pkey context using an ENGINE */
 230     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 231         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 232         return 0;
 233     }
 234 #endif
 235     rctx = OPENSSL_malloc(sizeof(*rctx));
 236     if (rctx == NULL)
 237         return NULL;
 238
 239     rctx->pmeth = pctx->pmeth;
 240 #ifndef OPENSSL_NO_ENGINE
 241     rctx->engine = pctx->engine;
 242 #endif
 243
 244     if (pctx->pkey)
 245         EVP_PKEY_up_ref(pctx->pkey);
 246
 247     rctx->pkey = pctx->pkey;
 248
 249     if (pctx->peerkey)
 250         EVP_PKEY_up_ref(pctx->peerkey);
 251
 252     rctx->peerkey = pctx->peerkey;
 253
 254     rctx->data = NULL;
 255     rctx->app_data = NULL;
 256     rctx->operation = pctx->operation;
 257
 258     if (pctx->pmeth->copy(rctx, pctx) > 0)
 259         return rctx;
 260
 261     EVP_PKEY_CTX_free(rctx);
 262     return NULL;
 263
 264 }
 265
 266 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 267 {
 268     if (app_pkey_methods == NULL) {
 269         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 270         if (app_pkey_methods == NULL)
 271             return 0;
 272     }
 273     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
 274         return 0;
 275     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 276     return 1;
 277 }
 278
 279 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 280 {
 281     if (ctx == NULL)
 282         return;
 283     if (ctx->pmeth && ctx->pmeth->cleanup)
 284         ctx->pmeth->cleanup(ctx);
 285     EVP_PKEY_free(ctx->pkey);
 286     EVP_PKEY_free(ctx->peerkey);
 287 #ifndef OPENSSL_NO_ENGINE
 288     ENGINE_finish(ctx->engine);
 289 #endif
 290     OPENSSL_free(ctx);
 291 }
 292
 293 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 294                       int cmd, int p1, void *p2)
 295 {
 296     int ret;
 297     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
 298         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 299         return -2;
 300     }
 301     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 302         return -1;
 303
 304     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 305         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 306         return -1;
 307     }
 308
 309     if ((optype != -1) && !(ctx->operation & optype)) {
 310         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 311         return -1;
 312     }
 313
 314     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 315
 316     if (ret == -2)
 317         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 318
 319     return ret;
 320
 321 }
 322
 323 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 324                           const char *name, const char *value)
 325 {
 326     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 327         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 328         return -2;
 329     }
 330     if (strcmp(name, "digest") == 0) {
 331         const EVP_MD *md;
 332         if (value == NULL || (md = EVP_get_digestbyname(value)) == NULL) {
 333             EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
 334             return 0;
 335         }
 336         return EVP_PKEY_CTX_set_signature_md(ctx, md);
 337     }
 338     return ctx->pmeth->ctrl_str(ctx, name, value);
 339 }
 340
 341 /* Utility functions to send a string of hex string to a ctrl */
 342
 343 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 344 {
 345     size_t len;
 346
 347     len = strlen(str);
 348     if (len > INT_MAX)
 349         return -1;
 350     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 351 }
 352
 353 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 354 {
 355     unsigned char *bin;
 356     long binlen;
 357     int rv = -1;
 358
 359     bin = OPENSSL_hexstr2buf(hex, &binlen);
 360     if (bin == NULL)
 361         return 0;
 362     if (binlen <= INT_MAX)
 363         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 364     OPENSSL_free(bin);
 365     return rv;
 366 }
 367
 368 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 369 {
 370     return ctx->operation;
 371 }
 372
 373 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 374 {
 375     ctx->keygen_info = dat;
 376     ctx->keygen_info_count = datlen;
 377 }
 378
 379 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 380 {
 381     ctx->data = data;
 382 }
 383
 384 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
 385 {
 386     return ctx->data;
 387 }
 388
 389 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 390 {
 391     return ctx->pkey;
 392 }
 393
 394 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 395 {
 396     return ctx->peerkey;
 397 }
 398
 399 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 400 {
 401     ctx->app_data = data;
 402 }
 403
 404 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 405 {
 406     return ctx->app_data;
 407 }
 408
 409 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 410                             int (*init) (EVP_PKEY_CTX *ctx))
 411 {
 412     pmeth->init = init;
 413 }
 414
 415 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 416                             int (*copy) (EVP_PKEY_CTX *dst,
 417                                          EVP_PKEY_CTX *src))
 418 {
 419     pmeth->copy = copy;
 420 }
 421
 422 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 423                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 424 {
 425     pmeth->cleanup = cleanup;
 426 }
 427
 428 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 429                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 430                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 431                                                  EVP_PKEY *pkey))
 432 {
 433     pmeth->paramgen_init = paramgen_init;
 434     pmeth->paramgen = paramgen;
 435 }
 436
 437 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 438                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 439                               int (*keygen) (EVP_PKEY_CTX *ctx,
 440                                              EVP_PKEY *pkey))
 441 {
 442     pmeth->keygen_init = keygen_init;
 443     pmeth->keygen = keygen;
 444 }
 445
 446 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 447                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 448                             int (*sign) (EVP_PKEY_CTX *ctx,
 449                                          unsigned char *sig, size_t *siglen,
 450                                          const unsigned char *tbs,
 451                                          size_t tbslen))
 452 {
 453     pmeth->sign_init = sign_init;
 454     pmeth->sign = sign;
 455 }
 456
 457 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 458                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 459                               int (*verify) (EVP_PKEY_CTX *ctx,
 460                                              const unsigned char *sig,
 461                                              size_t siglen,
 462                                              const unsigned char *tbs,
 463                                              size_t tbslen))
 464 {
 465     pmeth->verify_init = verify_init;
 466     pmeth->verify = verify;
 467 }
 468
 469 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 470                                       int (*verify_recover_init) (EVP_PKEY_CTX
 471                                                                   *ctx),
 472                                       int (*verify_recover) (EVP_PKEY_CTX
 473                                                              *ctx,
 474                                                              unsigned char
 475                                                              *sig,
 476                                                              size_t *siglen,
 477                                                              const unsigned
 478                                                              char *tbs,
 479                                                              size_t tbslen))
 480 {
 481     pmeth->verify_recover_init = verify_recover_init;
 482     pmeth->verify_recover = verify_recover;
 483 }
 484
 485 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 486                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 487                                                     EVP_MD_CTX *mctx),
 488                                int (*signctx) (EVP_PKEY_CTX *ctx,
 489                                                unsigned char *sig,
 490                                                size_t *siglen,
 491                                                EVP_MD_CTX *mctx))
 492 {
 493     pmeth->signctx_init = signctx_init;
 494     pmeth->signctx = signctx;
 495 }
 496
 497 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 498                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 499                                                         EVP_MD_CTX *mctx),
 500                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 501                                                    const unsigned char *sig,
 502                                                    int siglen,
 503                                                    EVP_MD_CTX *mctx))
 504 {
 505     pmeth->verifyctx_init = verifyctx_init;
 506     pmeth->verifyctx = verifyctx;
 507 }
 508
 509 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 510                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 511                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 512                                                  unsigned char *out,
 513                                                  size_t *outlen,
 514                                                  const unsigned char *in,
 515                                                  size_t inlen))
 516 {
 517     pmeth->encrypt_init = encrypt_init;
 518     pmeth->encrypt = encryptfn;
 519 }
 520
 521 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 522                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 523                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 524                                                unsigned char *out,
 525                                                size_t *outlen,
 526                                                const unsigned char *in,
 527                                                size_t inlen))
 528 {
 529     pmeth->decrypt_init = decrypt_init;
 530     pmeth->decrypt = decrypt;
 531 }
 532
 533 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 534                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 535                               int (*derive) (EVP_PKEY_CTX *ctx,
 536                                              unsigned char *key,
 537                                              size_t *keylen))
 538 {
 539     pmeth->derive_init = derive_init;
 540     pmeth->derive = derive;
 541 }
 542
 543 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 544                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 545                                          void *p2),
 546                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 547                                              const char *type,
 548                                              const char *value))
 549 {
 550     pmeth->ctrl = ctrl;
 551     pmeth->ctrl_str = ctrl_str;
 552 }
 553
 554 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
 555                             int (**pinit) (EVP_PKEY_CTX *ctx))
 556 {
 557     *pinit = pmeth->init;
 558 }
 559
 560 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
 561                             int (**pcopy) (EVP_PKEY_CTX *dst,
 562                                            EVP_PKEY_CTX *src))
 563 {
 564     *pcopy = pmeth->copy;
 565 }
 566
 567 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
 568                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 569 {
 570     *pcleanup = pmeth->cleanup;
 571 }
 572
 573 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
 574                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 575                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 576                                                    EVP_PKEY *pkey))
 577 {
 578     if (pparamgen_init)
 579         *pparamgen_init = pmeth->paramgen_init;
 580     if (pparamgen)
 581         *pparamgen = pmeth->paramgen;
 582 }
 583
 584 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
 585                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 586                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 587                                                EVP_PKEY *pkey))
 588 {
 589     if (pkeygen_init)
 590         *pkeygen_init = pmeth->keygen_init;
 591     if (pkeygen)
 592         *pkeygen = pmeth->keygen;
 593 }
 594
 595 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
 596                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 597                             int (**psign) (EVP_PKEY_CTX *ctx,
 598                                            unsigned char *sig, size_t *siglen,
 599                                            const unsigned char *tbs,
 600                                            size_t tbslen))
 601 {
 602     if (psign_init)
 603         *psign_init = pmeth->sign_init;
 604     if (psign)
 605         *psign = pmeth->sign;
 606 }
 607
 608 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
 609                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 610                               int (**pverify) (EVP_PKEY_CTX *ctx,
 611                                                const unsigned char *sig,
 612                                                size_t siglen,
 613                                                const unsigned char *tbs,
 614                                                size_t tbslen))
 615 {
 616     if (pverify_init)
 617         *pverify_init = pmeth->verify_init;
 618     if (pverify)
 619         *pverify = pmeth->verify;
 620 }
 621
 622 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
 623                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 624                                                                     *ctx),
 625                                       int (**pverify_recover) (EVP_PKEY_CTX
 626                                                                *ctx,
 627                                                                unsigned char
 628                                                                *sig,
 629                                                                size_t *siglen,
 630                                                                const unsigned
 631                                                                char *tbs,
 632                                                                size_t tbslen))
 633 {
 634     if (pverify_recover_init)
 635         *pverify_recover_init = pmeth->verify_recover_init;
 636     if (pverify_recover)
 637         *pverify_recover = pmeth->verify_recover;
 638 }
 639
 640 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
 641                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 642                                                       EVP_MD_CTX *mctx),
 643                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 644                                                  unsigned char *sig,
 645                                                  size_t *siglen,
 646                                                  EVP_MD_CTX *mctx))
 647 {
 648     if (psignctx_init)
 649         *psignctx_init = pmeth->signctx_init;
 650     if (psignctx)
 651         *psignctx = pmeth->signctx;
 652 }
 653
 654 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
 655                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 656                                                           EVP_MD_CTX *mctx),
 657                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 658                                                      const unsigned char *sig,
 659                                                      int siglen,
 660                                                      EVP_MD_CTX *mctx))
 661 {
 662     if (pverifyctx_init)
 663         *pverifyctx_init = pmeth->verifyctx_init;
 664     if (pverifyctx)
 665         *pverifyctx = pmeth->verifyctx;
 666 }
 667
 668 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
 669                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 670                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 671                                                    unsigned char *out,
 672                                                    size_t *outlen,
 673                                                    const unsigned char *in,
 674                                                    size_t inlen))
 675 {
 676     if (pencrypt_init)
 677         *pencrypt_init = pmeth->encrypt_init;
 678     if (pencryptfn)
 679         *pencryptfn = pmeth->encrypt;
 680 }
 681
 682 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
 683                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 684                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 685                                                  unsigned char *out,
 686                                                  size_t *outlen,
 687                                                  const unsigned char *in,
 688                                                  size_t inlen))
 689 {
 690     if (pdecrypt_init)
 691         *pdecrypt_init = pmeth->decrypt_init;
 692     if (pdecrypt)
 693         *pdecrypt = pmeth->decrypt;
 694 }
 695
 696 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
 697                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 698                               int (**pderive) (EVP_PKEY_CTX *ctx,
 699                                                unsigned char *key,
 700                                                size_t *keylen))
 701 {
 702     if (pderive_init)
 703         *pderive_init = pmeth->derive_init;
 704     if (pderive)
 705         *pderive = pmeth->derive;
 706 }
 707
 708 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
 709                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 710                                            void *p2),
 711                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 712                                                const char *type,
 713                                                const char *value))
 714 {
 715     if (pctrl)
 716         *pctrl = pmeth->ctrl;
 717     if (pctrl_str)
 718         *pctrl_str = pmeth->ctrl_str;
 719 }