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