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