crypto/evp/pmeth_lib.c

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