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