crypto/evp/pmeth_lib.c

   1
   2 /*
   3  * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
   4  *
   5  * Licensed under the Apache License 2.0 (the "License").  You may not use
   6  * this file except in compliance with the License.  You can obtain a copy
   7  * in the file LICENSE in the source distribution or at
   8  * https://www.openssl.org/source/license.html
   9  */
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <openssl/engine.h>
  14 #include <openssl/evp.h>
  15 #include <openssl/x509v3.h>
  16 #include <openssl/core_names.h>
  17 #include <openssl/dh.h>
  18 #include "internal/cryptlib.h"
  19 #include "internal/asn1_int.h"
  20 #include "internal/evp_int.h"
  21 #include "internal/numbers.h"
  22 #include "internal/provider.h"
  23 #include "evp_locl.h"
  24
  25 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  26
  27 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
  28
  29 /* This array needs to be in order of NIDs */
  30 static const EVP_PKEY_METHOD *standard_methods[] = {
  31 #ifndef OPENSSL_NO_RSA
  32     &rsa_pkey_meth,
  33 #endif
  34 #ifndef OPENSSL_NO_DH
  35     &dh_pkey_meth,
  36 #endif
  37 #ifndef OPENSSL_NO_DSA
  38     &dsa_pkey_meth,
  39 #endif
  40 #ifndef OPENSSL_NO_EC
  41     &ec_pkey_meth,
  42 #endif
  43     &hmac_pkey_meth,
  44 #ifndef OPENSSL_NO_CMAC
  45     &cmac_pkey_meth,
  46 #endif
  47 #ifndef OPENSSL_NO_RSA
  48     &rsa_pss_pkey_meth,
  49 #endif
  50 #ifndef OPENSSL_NO_DH
  51     &dhx_pkey_meth,
  52 #endif
  53 #ifndef OPENSSL_NO_SCRYPT
  54     &scrypt_pkey_meth,
  55 #endif
  56     &tls1_prf_pkey_meth,
  57 #ifndef OPENSSL_NO_EC
  58     &ecx25519_pkey_meth,
  59     &ecx448_pkey_meth,
  60 #endif
  61     &hkdf_pkey_meth,
  62 #ifndef OPENSSL_NO_POLY1305
  63     &poly1305_pkey_meth,
  64 #endif
  65 #ifndef OPENSSL_NO_SIPHASH
  66     &siphash_pkey_meth,
  67 #endif
  68 #ifndef OPENSSL_NO_EC
  69     &ed25519_pkey_meth,
  70     &ed448_pkey_meth,
  71 #endif
  72 #ifndef OPENSSL_NO_SM2
  73     &sm2_pkey_meth,
  74 #endif
  75 };
  76
  77 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  78                            pmeth);
  79
  80 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
  81                      const EVP_PKEY_METHOD *const *b)
  82 {
  83     return ((*a)->pkey_id - (*b)->pkey_id);
  84 }
  85
  86 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
  87                              pmeth);
  88
  89 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
  90 {
  91     EVP_PKEY_METHOD tmp;
  92     const EVP_PKEY_METHOD *t = &tmp, **ret;
  93     tmp.pkey_id = type;
  94     if (app_pkey_methods) {
  95         int idx;
  96         idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
  97         if (idx >= 0)
  98             return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
  99     }
 100     ret = OBJ_bsearch_pmeth(&t, standard_methods,
 101                             sizeof(standard_methods) /
 102                             sizeof(EVP_PKEY_METHOD *));
 103     if (!ret || !*ret)
 104         return NULL;
 105     return *ret;
 106 }
 107
 108 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
 109 {
 110     EVP_PKEY_CTX *ret;
 111     const EVP_PKEY_METHOD *pmeth = NULL;
 112
 113     /*
 114      * When using providers, the context is bound to the algo implementation
 115      * later.
 116      */
 117     if (pkey == NULL && e == NULL && id == -1)
 118         goto common;
 119
 120     /* TODO(3.0) Legacy code should be removed when all is provider based */
 121     /* BEGIN legacy */
 122     if (id == -1) {
 123         if (pkey == NULL)
 124             return 0;
 125         id = pkey->type;
 126     }
 127 #ifndef OPENSSL_NO_ENGINE
 128     if (e == NULL && pkey != NULL)
 129         e = pkey->pmeth_engine != NULL ? pkey->pmeth_engine : pkey->engine;
 130     /* Try to find an ENGINE which implements this method */
 131     if (e) {
 132         if (!ENGINE_init(e)) {
 133             EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
 134             return NULL;
 135         }
 136     } else {
 137         e = ENGINE_get_pkey_meth_engine(id);
 138     }
 139
 140     /*
 141      * If an ENGINE handled this method look it up. Otherwise use internal
 142      * tables.
 143      */
 144     if (e)
 145         pmeth = ENGINE_get_pkey_meth(e, id);
 146     else
 147 #endif
 148         pmeth = EVP_PKEY_meth_find(id);
 149
 150     if (pmeth == NULL) {
 151 #ifndef OPENSSL_NO_ENGINE
 152         ENGINE_finish(e);
 153 #endif
 154         EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
 155         return NULL;
 156     }
 157     /* END legacy */
 158
 159  common:
 160     ret = OPENSSL_zalloc(sizeof(*ret));
 161     if (ret == NULL) {
 162 #ifndef OPENSSL_NO_ENGINE
 163         ENGINE_finish(e);
 164 #endif
 165         EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
 166         return NULL;
 167     }
 168     ret->engine = e;
 169     ret->pmeth = pmeth;
 170     ret->operation = EVP_PKEY_OP_UNDEFINED;
 171     ret->pkey = pkey;
 172     if (pkey != NULL)
 173         EVP_PKEY_up_ref(pkey);
 174
 175     if (pmeth != NULL && pmeth->init != NULL) {
 176         if (pmeth->init(ret) <= 0) {
 177             ret->pmeth = NULL;
 178             EVP_PKEY_CTX_free(ret);
 179             return NULL;
 180         }
 181     }
 182
 183     return ret;
 184 }
 185
 186 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
 187 {
 188     EVP_PKEY_METHOD *pmeth;
 189
 190     pmeth = OPENSSL_zalloc(sizeof(*pmeth));
 191     if (pmeth == NULL) {
 192         EVPerr(EVP_F_EVP_PKEY_METH_NEW, ERR_R_MALLOC_FAILURE);
 193         return NULL;
 194     }
 195
 196     pmeth->pkey_id = id;
 197     pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
 198     return pmeth;
 199 }
 200
 201 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
 202                              const EVP_PKEY_METHOD *meth)
 203 {
 204     if (ppkey_id)
 205         *ppkey_id = meth->pkey_id;
 206     if (pflags)
 207         *pflags = meth->flags;
 208 }
 209
 210 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
 211 {
 212
 213     dst->init = src->init;
 214     dst->copy = src->copy;
 215     dst->cleanup = src->cleanup;
 216
 217     dst->paramgen_init = src->paramgen_init;
 218     dst->paramgen = src->paramgen;
 219
 220     dst->keygen_init = src->keygen_init;
 221     dst->keygen = src->keygen;
 222
 223     dst->sign_init = src->sign_init;
 224     dst->sign = src->sign;
 225
 226     dst->verify_init = src->verify_init;
 227     dst->verify = src->verify;
 228
 229     dst->verify_recover_init = src->verify_recover_init;
 230     dst->verify_recover = src->verify_recover;
 231
 232     dst->signctx_init = src->signctx_init;
 233     dst->signctx = src->signctx;
 234
 235     dst->verifyctx_init = src->verifyctx_init;
 236     dst->verifyctx = src->verifyctx;
 237
 238     dst->encrypt_init = src->encrypt_init;
 239     dst->encrypt = src->encrypt;
 240
 241     dst->decrypt_init = src->decrypt_init;
 242     dst->decrypt = src->decrypt;
 243
 244     dst->derive_init = src->derive_init;
 245     dst->derive = src->derive;
 246
 247     dst->ctrl = src->ctrl;
 248     dst->ctrl_str = src->ctrl_str;
 249
 250     dst->check = src->check;
 251 }
 252
 253 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
 254 {
 255     if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
 256         OPENSSL_free(pmeth);
 257 }
 258
 259 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
 260 {
 261     return int_ctx_new(pkey, e, -1);
 262 }
 263
 264 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
 265 {
 266     return int_ctx_new(NULL, e, id);
 267 }
 268
 269 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(const EVP_PKEY_CTX *pctx)
 270 {
 271     EVP_PKEY_CTX *rctx;
 272
 273     if (((pctx->pmeth == NULL) || (pctx->pmeth->copy == NULL))
 274             && pctx->exchprovctx == NULL)
 275         return NULL;
 276 #ifndef OPENSSL_NO_ENGINE
 277     /* Make sure it's safe to copy a pkey context using an ENGINE */
 278     if (pctx->engine && !ENGINE_init(pctx->engine)) {
 279         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
 280         return 0;
 281     }
 282 #endif
 283     rctx = OPENSSL_zalloc(sizeof(*rctx));
 284     if (rctx == NULL) {
 285         EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_MALLOC_FAILURE);
 286         return NULL;
 287     }
 288
 289     if (pctx->pkey != NULL)
 290         EVP_PKEY_up_ref(pctx->pkey);
 291     rctx->pkey = pctx->pkey;
 292     rctx->operation = pctx->operation;
 293
 294     if (pctx->exchprovctx != NULL) {
 295         if (!ossl_assert(pctx->exchange != NULL))
 296             return NULL;
 297         rctx->exchange = pctx->exchange;
 298         if (!EVP_KEYEXCH_up_ref(rctx->exchange)) {
 299             OPENSSL_free(rctx);
 300             return NULL;
 301         }
 302         rctx->exchprovctx = pctx->exchange->dupctx(pctx->exchprovctx);
 303         if (rctx->exchprovctx == NULL) {
 304             EVP_KEYEXCH_free(rctx->exchange);
 305             OPENSSL_free(rctx);
 306             return NULL;
 307         }
 308         return rctx;
 309     }
 310
 311     rctx->pmeth = pctx->pmeth;
 312 #ifndef OPENSSL_NO_ENGINE
 313     rctx->engine = pctx->engine;
 314 #endif
 315
 316     if (pctx->peerkey)
 317         EVP_PKEY_up_ref(pctx->peerkey);
 318     rctx->peerkey = pctx->peerkey;
 319
 320     if (pctx->pmeth->copy(rctx, pctx) > 0)
 321         return rctx;
 322
 323     rctx->pmeth = NULL;
 324     EVP_PKEY_CTX_free(rctx);
 325     return NULL;
 326
 327 }
 328
 329 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 330 {
 331     if (app_pkey_methods == NULL) {
 332         app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
 333         if (app_pkey_methods == NULL){
 334             EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 335             return 0;
 336         }
 337     }
 338     if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth)) {
 339         EVPerr(EVP_F_EVP_PKEY_METH_ADD0, ERR_R_MALLOC_FAILURE);
 340         return 0;
 341     }
 342     sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
 343     return 1;
 344 }
 345
 346 void evp_app_cleanup_int(void)
 347 {
 348     if (app_pkey_methods != NULL)
 349         sk_EVP_PKEY_METHOD_pop_free(app_pkey_methods, EVP_PKEY_meth_free);
 350 }
 351
 352 int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth)
 353 {
 354     const EVP_PKEY_METHOD *ret;
 355
 356     ret = sk_EVP_PKEY_METHOD_delete_ptr(app_pkey_methods, pmeth);
 357
 358     return ret == NULL ? 0 : 1;
 359 }
 360
 361 size_t EVP_PKEY_meth_get_count(void)
 362 {
 363     size_t rv = OSSL_NELEM(standard_methods);
 364
 365     if (app_pkey_methods)
 366         rv += sk_EVP_PKEY_METHOD_num(app_pkey_methods);
 367     return rv;
 368 }
 369
 370 const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx)
 371 {
 372     if (idx < OSSL_NELEM(standard_methods))
 373         return standard_methods[idx];
 374     if (app_pkey_methods == NULL)
 375         return NULL;
 376     idx -= OSSL_NELEM(standard_methods);
 377     if (idx >= (size_t)sk_EVP_PKEY_METHOD_num(app_pkey_methods))
 378         return NULL;
 379     return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
 380 }
 381
 382 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 383 {
 384     if (ctx == NULL)
 385         return;
 386     if (ctx->pmeth && ctx->pmeth->cleanup)
 387         ctx->pmeth->cleanup(ctx);
 388
 389     if (ctx->exchprovctx != NULL && ctx->exchange != NULL)
 390         ctx->exchange->freectx(ctx->exchprovctx);
 391
 392     EVP_KEYEXCH_free(ctx->exchange);
 393
 394     if (ctx->sigprovctx != NULL && ctx->signature != NULL)
 395         ctx->signature->freectx(ctx->sigprovctx);
 396
 397     EVP_SIGNATURE_free(ctx->signature);
 398
 399     EVP_PKEY_free(ctx->pkey);
 400     EVP_PKEY_free(ctx->peerkey);
 401 #ifndef OPENSSL_NO_ENGINE
 402     ENGINE_finish(ctx->engine);
 403 #endif
 404     OPENSSL_free(ctx);
 405 }
 406
 407 int EVP_PKEY_CTX_set_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params)
 408 {
 409     if (ctx->exchprovctx != NULL && ctx->exchange != NULL)
 410         return ctx->exchange->set_params(ctx->exchprovctx, params);
 411     if (ctx->sigprovctx != NULL && ctx->signature != NULL)
 412         return ctx->signature->set_params(ctx->sigprovctx, params);
 413     return 0;
 414 }
 415
 416 #ifndef OPENSSL_NO_DH
 417 int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad)
 418 {
 419     OSSL_PARAM dh_pad_params[2];
 420     unsigned int upad = pad;
 421
 422     /* TODO(3.0): Remove this eventually when no more legacy */
 423     if (ctx->exchprovctx == NULL)
 424         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_DERIVE,
 425                                  EVP_PKEY_CTRL_DH_PAD, pad, NULL);
 426
 427     dh_pad_params[0] = OSSL_PARAM_construct_uint(OSSL_EXCHANGE_PARAM_PAD, &upad);
 428     dh_pad_params[1] = OSSL_PARAM_construct_end();
 429
 430     return EVP_PKEY_CTX_set_params(ctx, dh_pad_params);
 431 }
 432 #endif
 433
 434 int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
 435 {
 436     OSSL_PARAM sig_md_params[3];
 437     size_t mdsize;
 438     const char *name;
 439
 440     /* TODO(3.0): Remove this eventually when no more legacy */
 441     if (ctx->sigprovctx == NULL)
 442         return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,
 443                                  EVP_PKEY_CTRL_MD, 0, (void *)(md));
 444
 445     if (md == NULL)
 446         return 1;
 447
 448     mdsize = EVP_MD_size(md);
 449     name = EVP_MD_name(md);
 450     sig_md_params[0] = OSSL_PARAM_construct_utf8_string(
 451                            OSSL_SIGNATURE_PARAM_DIGEST,
 452                            /*
 453                             * Cast away the const. This is read only so should
 454                             * be safe
 455                             */
 456                            (char *)name,
 457                            strlen(name) + 1);
 458     sig_md_params[1] = OSSL_PARAM_construct_size_t(OSSL_SIGNATURE_PARAM_DIGEST_SIZE,
 459                                                    &mdsize);
 460     sig_md_params[2] = OSSL_PARAM_construct_end();
 461
 462     return EVP_PKEY_CTX_set_params(ctx, sig_md_params);
 463
 464 }
 465
 466 static int legacy_ctrl_to_param(EVP_PKEY_CTX *ctx, int keytype, int optype,
 467                                 int cmd, int p1, void *p2)
 468 {
 469     switch (cmd) {
 470 #ifndef OPENSSL_NO_DH
 471     case EVP_PKEY_CTRL_DH_PAD:
 472         return EVP_PKEY_CTX_set_dh_pad(ctx, p1);
 473 #endif
 474     case EVP_PKEY_CTRL_MD:
 475         return EVP_PKEY_CTX_set_signature_md(ctx, p2);
 476     }
 477     return 0;
 478 }
 479
 480 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
 481                       int cmd, int p1, void *p2)
 482 {
 483     int ret;
 484
 485     if (ctx == NULL) {
 486         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 487         return -2;
 488     }
 489
 490     if (ctx->exchprovctx != NULL || ctx->sigprovctx != NULL)
 491         return legacy_ctrl_to_param(ctx, keytype, optype, cmd, p1, p2);
 492
 493     if (ctx->pmeth == NULL || ctx->pmeth->ctrl == NULL) {
 494         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 495         return -2;
 496     }
 497     if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
 498         return -1;
 499
 500     /* Skip the operation checks since this is called in a very early stage */
 501     if (ctx->pmeth->digest_custom != NULL)
 502         goto doit;
 503
 504     if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
 505         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
 506         return -1;
 507     }
 508
 509     if ((optype != -1) && !(ctx->operation & optype)) {
 510         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
 511         return -1;
 512     }
 513
 514  doit:
 515     ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
 516
 517     if (ret == -2)
 518         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
 519
 520     return ret;
 521 }
 522
 523 int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
 524                              int cmd, uint64_t value)
 525 {
 526     return EVP_PKEY_CTX_ctrl(ctx, keytype, optype, cmd, 0, &value);
 527 }
 528
 529 static int legacy_ctrl_str_to_param(EVP_PKEY_CTX *ctx, const char *name,
 530                                     const char *value)
 531 {
 532 #ifndef OPENSSL_NO_DH
 533     if (strcmp(name, "dh_pad") == 0) {
 534         int pad;
 535
 536         pad = atoi(value);
 537         return EVP_PKEY_CTX_set_dh_pad(ctx, pad);
 538     }
 539 #endif
 540     if (strcmp(name, "digest") == 0) {
 541         int ret;
 542         EVP_MD *md
 543             = EVP_MD_fetch(ossl_provider_library_context(ctx->signature->prov),
 544                            value, NULL);
 545         if (md == NULL)
 546             return 0;
 547         ret = EVP_PKEY_CTX_set_signature_md(ctx, md);
 548         EVP_MD_meth_free(md);
 549         return ret;
 550     }
 551
 552     return 0;
 553 }
 554
 555 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
 556                           const char *name, const char *value)
 557 {
 558     if (ctx == NULL) {
 559         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 560         return -2;
 561     }
 562
 563     if (ctx->exchprovctx != NULL || ctx->sigprovctx != NULL)
 564         return legacy_ctrl_str_to_param(ctx, name, value);
 565
 566     if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
 567         EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
 568         return -2;
 569     }
 570     if (strcmp(name, "digest") == 0)
 571         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
 572                                value);
 573     return ctx->pmeth->ctrl_str(ctx, name, value);
 574 }
 575
 576 /* Utility functions to send a string of hex string to a ctrl */
 577
 578 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
 579 {
 580     size_t len;
 581
 582     len = strlen(str);
 583     if (len > INT_MAX)
 584         return -1;
 585     return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
 586 }
 587
 588 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
 589 {
 590     unsigned char *bin;
 591     long binlen;
 592     int rv = -1;
 593
 594     bin = OPENSSL_hexstr2buf(hex, &binlen);
 595     if (bin == NULL)
 596         return 0;
 597     if (binlen <= INT_MAX)
 598         rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
 599     OPENSSL_free(bin);
 600     return rv;
 601 }
 602
 603 /* Pass a message digest to a ctrl */
 604 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
 605 {
 606     const EVP_MD *m;
 607
 608     if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
 609         EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
 610         return 0;
 611     }
 612     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
 613 }
 614
 615 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
 616 {
 617     return ctx->operation;
 618 }
 619
 620 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
 621 {
 622     ctx->keygen_info = dat;
 623     ctx->keygen_info_count = datlen;
 624 }
 625
 626 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
 627 {
 628     ctx->data = data;
 629 }
 630
 631 void *EVP_PKEY_CTX_get_data(const EVP_PKEY_CTX *ctx)
 632 {
 633     return ctx->data;
 634 }
 635
 636 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
 637 {
 638     return ctx->pkey;
 639 }
 640
 641 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
 642 {
 643     return ctx->peerkey;
 644 }
 645
 646 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
 647 {
 648     ctx->app_data = data;
 649 }
 650
 651 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
 652 {
 653     return ctx->app_data;
 654 }
 655
 656 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
 657                             int (*init) (EVP_PKEY_CTX *ctx))
 658 {
 659     pmeth->init = init;
 660 }
 661
 662 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
 663                             int (*copy) (EVP_PKEY_CTX *dst,
 664                                          const EVP_PKEY_CTX *src))
 665 {
 666     pmeth->copy = copy;
 667 }
 668
 669 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
 670                                void (*cleanup) (EVP_PKEY_CTX *ctx))
 671 {
 672     pmeth->cleanup = cleanup;
 673 }
 674
 675 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
 676                                 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
 677                                 int (*paramgen) (EVP_PKEY_CTX *ctx,
 678                                                  EVP_PKEY *pkey))
 679 {
 680     pmeth->paramgen_init = paramgen_init;
 681     pmeth->paramgen = paramgen;
 682 }
 683
 684 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
 685                               int (*keygen_init) (EVP_PKEY_CTX *ctx),
 686                               int (*keygen) (EVP_PKEY_CTX *ctx,
 687                                              EVP_PKEY *pkey))
 688 {
 689     pmeth->keygen_init = keygen_init;
 690     pmeth->keygen = keygen;
 691 }
 692
 693 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
 694                             int (*sign_init) (EVP_PKEY_CTX *ctx),
 695                             int (*sign) (EVP_PKEY_CTX *ctx,
 696                                          unsigned char *sig, size_t *siglen,
 697                                          const unsigned char *tbs,
 698                                          size_t tbslen))
 699 {
 700     pmeth->sign_init = sign_init;
 701     pmeth->sign = sign;
 702 }
 703
 704 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
 705                               int (*verify_init) (EVP_PKEY_CTX *ctx),
 706                               int (*verify) (EVP_PKEY_CTX *ctx,
 707                                              const unsigned char *sig,
 708                                              size_t siglen,
 709                                              const unsigned char *tbs,
 710                                              size_t tbslen))
 711 {
 712     pmeth->verify_init = verify_init;
 713     pmeth->verify = verify;
 714 }
 715
 716 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
 717                                       int (*verify_recover_init) (EVP_PKEY_CTX
 718                                                                   *ctx),
 719                                       int (*verify_recover) (EVP_PKEY_CTX
 720                                                              *ctx,
 721                                                              unsigned char
 722                                                              *sig,
 723                                                              size_t *siglen,
 724                                                              const unsigned
 725                                                              char *tbs,
 726                                                              size_t tbslen))
 727 {
 728     pmeth->verify_recover_init = verify_recover_init;
 729     pmeth->verify_recover = verify_recover;
 730 }
 731
 732 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
 733                                int (*signctx_init) (EVP_PKEY_CTX *ctx,
 734                                                     EVP_MD_CTX *mctx),
 735                                int (*signctx) (EVP_PKEY_CTX *ctx,
 736                                                unsigned char *sig,
 737                                                size_t *siglen,
 738                                                EVP_MD_CTX *mctx))
 739 {
 740     pmeth->signctx_init = signctx_init;
 741     pmeth->signctx = signctx;
 742 }
 743
 744 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
 745                                  int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
 746                                                         EVP_MD_CTX *mctx),
 747                                  int (*verifyctx) (EVP_PKEY_CTX *ctx,
 748                                                    const unsigned char *sig,
 749                                                    int siglen,
 750                                                    EVP_MD_CTX *mctx))
 751 {
 752     pmeth->verifyctx_init = verifyctx_init;
 753     pmeth->verifyctx = verifyctx;
 754 }
 755
 756 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
 757                                int (*encrypt_init) (EVP_PKEY_CTX *ctx),
 758                                int (*encryptfn) (EVP_PKEY_CTX *ctx,
 759                                                  unsigned char *out,
 760                                                  size_t *outlen,
 761                                                  const unsigned char *in,
 762                                                  size_t inlen))
 763 {
 764     pmeth->encrypt_init = encrypt_init;
 765     pmeth->encrypt = encryptfn;
 766 }
 767
 768 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
 769                                int (*decrypt_init) (EVP_PKEY_CTX *ctx),
 770                                int (*decrypt) (EVP_PKEY_CTX *ctx,
 771                                                unsigned char *out,
 772                                                size_t *outlen,
 773                                                const unsigned char *in,
 774                                                size_t inlen))
 775 {
 776     pmeth->decrypt_init = decrypt_init;
 777     pmeth->decrypt = decrypt;
 778 }
 779
 780 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
 781                               int (*derive_init) (EVP_PKEY_CTX *ctx),
 782                               int (*derive) (EVP_PKEY_CTX *ctx,
 783                                              unsigned char *key,
 784                                              size_t *keylen))
 785 {
 786     pmeth->derive_init = derive_init;
 787     pmeth->derive = derive;
 788 }
 789
 790 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
 791                             int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 792                                          void *p2),
 793                             int (*ctrl_str) (EVP_PKEY_CTX *ctx,
 794                                              const char *type,
 795                                              const char *value))
 796 {
 797     pmeth->ctrl = ctrl;
 798     pmeth->ctrl_str = ctrl_str;
 799 }
 800
 801 void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
 802                              int (*check) (EVP_PKEY *pkey))
 803 {
 804     pmeth->check = check;
 805 }
 806
 807 void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
 808                                     int (*check) (EVP_PKEY *pkey))
 809 {
 810     pmeth->public_check = check;
 811 }
 812
 813 void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
 814                                    int (*check) (EVP_PKEY *pkey))
 815 {
 816     pmeth->param_check = check;
 817 }
 818
 819 void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
 820                                      int (*digest_custom) (EVP_PKEY_CTX *ctx,
 821                                                            EVP_MD_CTX *mctx))
 822 {
 823     pmeth->digest_custom = digest_custom;
 824 }
 825
 826 void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
 827                             int (**pinit) (EVP_PKEY_CTX *ctx))
 828 {
 829     *pinit = pmeth->init;
 830 }
 831
 832 void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
 833                             int (**pcopy) (EVP_PKEY_CTX *dst,
 834                                            const EVP_PKEY_CTX *src))
 835 {
 836     *pcopy = pmeth->copy;
 837 }
 838
 839 void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
 840                                void (**pcleanup) (EVP_PKEY_CTX *ctx))
 841 {
 842     *pcleanup = pmeth->cleanup;
 843 }
 844
 845 void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
 846                                 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
 847                                 int (**pparamgen) (EVP_PKEY_CTX *ctx,
 848                                                    EVP_PKEY *pkey))
 849 {
 850     if (pparamgen_init)
 851         *pparamgen_init = pmeth->paramgen_init;
 852     if (pparamgen)
 853         *pparamgen = pmeth->paramgen;
 854 }
 855
 856 void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
 857                               int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
 858                               int (**pkeygen) (EVP_PKEY_CTX *ctx,
 859                                                EVP_PKEY *pkey))
 860 {
 861     if (pkeygen_init)
 862         *pkeygen_init = pmeth->keygen_init;
 863     if (pkeygen)
 864         *pkeygen = pmeth->keygen;
 865 }
 866
 867 void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
 868                             int (**psign_init) (EVP_PKEY_CTX *ctx),
 869                             int (**psign) (EVP_PKEY_CTX *ctx,
 870                                            unsigned char *sig, size_t *siglen,
 871                                            const unsigned char *tbs,
 872                                            size_t tbslen))
 873 {
 874     if (psign_init)
 875         *psign_init = pmeth->sign_init;
 876     if (psign)
 877         *psign = pmeth->sign;
 878 }
 879
 880 void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
 881                               int (**pverify_init) (EVP_PKEY_CTX *ctx),
 882                               int (**pverify) (EVP_PKEY_CTX *ctx,
 883                                                const unsigned char *sig,
 884                                                size_t siglen,
 885                                                const unsigned char *tbs,
 886                                                size_t tbslen))
 887 {
 888     if (pverify_init)
 889         *pverify_init = pmeth->verify_init;
 890     if (pverify)
 891         *pverify = pmeth->verify;
 892 }
 893
 894 void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
 895                                       int (**pverify_recover_init) (EVP_PKEY_CTX
 896                                                                     *ctx),
 897                                       int (**pverify_recover) (EVP_PKEY_CTX
 898                                                                *ctx,
 899                                                                unsigned char
 900                                                                *sig,
 901                                                                size_t *siglen,
 902                                                                const unsigned
 903                                                                char *tbs,
 904                                                                size_t tbslen))
 905 {
 906     if (pverify_recover_init)
 907         *pverify_recover_init = pmeth->verify_recover_init;
 908     if (pverify_recover)
 909         *pverify_recover = pmeth->verify_recover;
 910 }
 911
 912 void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
 913                                int (**psignctx_init) (EVP_PKEY_CTX *ctx,
 914                                                       EVP_MD_CTX *mctx),
 915                                int (**psignctx) (EVP_PKEY_CTX *ctx,
 916                                                  unsigned char *sig,
 917                                                  size_t *siglen,
 918                                                  EVP_MD_CTX *mctx))
 919 {
 920     if (psignctx_init)
 921         *psignctx_init = pmeth->signctx_init;
 922     if (psignctx)
 923         *psignctx = pmeth->signctx;
 924 }
 925
 926 void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
 927                                  int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
 928                                                           EVP_MD_CTX *mctx),
 929                                  int (**pverifyctx) (EVP_PKEY_CTX *ctx,
 930                                                      const unsigned char *sig,
 931                                                      int siglen,
 932                                                      EVP_MD_CTX *mctx))
 933 {
 934     if (pverifyctx_init)
 935         *pverifyctx_init = pmeth->verifyctx_init;
 936     if (pverifyctx)
 937         *pverifyctx = pmeth->verifyctx;
 938 }
 939
 940 void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
 941                                int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
 942                                int (**pencryptfn) (EVP_PKEY_CTX *ctx,
 943                                                    unsigned char *out,
 944                                                    size_t *outlen,
 945                                                    const unsigned char *in,
 946                                                    size_t inlen))
 947 {
 948     if (pencrypt_init)
 949         *pencrypt_init = pmeth->encrypt_init;
 950     if (pencryptfn)
 951         *pencryptfn = pmeth->encrypt;
 952 }
 953
 954 void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
 955                                int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
 956                                int (**pdecrypt) (EVP_PKEY_CTX *ctx,
 957                                                  unsigned char *out,
 958                                                  size_t *outlen,
 959                                                  const unsigned char *in,
 960                                                  size_t inlen))
 961 {
 962     if (pdecrypt_init)
 963         *pdecrypt_init = pmeth->decrypt_init;
 964     if (pdecrypt)
 965         *pdecrypt = pmeth->decrypt;
 966 }
 967
 968 void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
 969                               int (**pderive_init) (EVP_PKEY_CTX *ctx),
 970                               int (**pderive) (EVP_PKEY_CTX *ctx,
 971                                                unsigned char *key,
 972                                                size_t *keylen))
 973 {
 974     if (pderive_init)
 975         *pderive_init = pmeth->derive_init;
 976     if (pderive)
 977         *pderive = pmeth->derive;
 978 }
 979
 980 void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
 981                             int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
 982                                            void *p2),
 983                             int (**pctrl_str) (EVP_PKEY_CTX *ctx,
 984                                                const char *type,
 985                                                const char *value))
 986 {
 987     if (pctrl)
 988         *pctrl = pmeth->ctrl;
 989     if (pctrl_str)
 990         *pctrl_str = pmeth->ctrl_str;
 991 }
 992
 993 void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
 994                              int (**pcheck) (EVP_PKEY *pkey))
 995 {
 996     if (pcheck != NULL)
 997         *pcheck = pmeth->check;
 998 }
 999
1000 void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
1001                                     int (**pcheck) (EVP_PKEY *pkey))
1002 {
1003     if (pcheck != NULL)
1004         *pcheck = pmeth->public_check;
1005 }
1006
1007 void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
1008                                    int (**pcheck) (EVP_PKEY *pkey))
1009 {
1010     if (pcheck != NULL)
1011         *pcheck = pmeth->param_check;
1012 }
1013
1014 void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
1015                                      int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
1016                                                              EVP_MD_CTX *mctx))
1017 {
1018     if (pdigest_custom != NULL)
1019         *pdigest_custom = pmeth->digest_custom;
1020 }