crypto/evp/p_lib.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 "internal/cryptlib.h"
  12 #include "internal/refcount.h"
  13 #include <openssl/bn.h>
  14 #include <openssl/err.h>
  15 #include <openssl/objects.h>
  16 #include <openssl/evp.h>
  17 #include <openssl/x509.h>
  18 #include <openssl/rsa.h>
  19 #include <openssl/dsa.h>
  20 #include <openssl/dh.h>
  21 #include <openssl/cmac.h>
  22 #include <openssl/engine.h>
  23 #include <openssl/params.h>
  24 #include <openssl/core_names.h>
  25
  26 #include "internal/asn1_int.h"
  27 #include "internal/evp_int.h"
  28 #include "internal/provider.h"
  29
  30 static void EVP_PKEY_free_it(EVP_PKEY *x);
  31
  32 int EVP_PKEY_bits(const EVP_PKEY *pkey)
  33 {
  34     if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
  35         return pkey->ameth->pkey_bits(pkey);
  36     return 0;
  37 }
  38
  39 int EVP_PKEY_security_bits(const EVP_PKEY *pkey)
  40 {
  41     if (pkey == NULL)
  42         return 0;
  43     if (!pkey->ameth || !pkey->ameth->pkey_security_bits)
  44         return -2;
  45     return pkey->ameth->pkey_security_bits(pkey);
  46 }
  47
  48 int EVP_PKEY_size(const EVP_PKEY *pkey)
  49 {
  50     if (pkey && pkey->ameth && pkey->ameth->pkey_size)
  51         return pkey->ameth->pkey_size(pkey);
  52     return 0;
  53 }
  54
  55 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
  56 {
  57 #ifndef OPENSSL_NO_DSA
  58     if (pkey->type == EVP_PKEY_DSA) {
  59         int ret = pkey->save_parameters;
  60
  61         if (mode >= 0)
  62             pkey->save_parameters = mode;
  63         return ret;
  64     }
  65 #endif
  66 #ifndef OPENSSL_NO_EC
  67     if (pkey->type == EVP_PKEY_EC) {
  68         int ret = pkey->save_parameters;
  69
  70         if (mode >= 0)
  71             pkey->save_parameters = mode;
  72         return ret;
  73     }
  74 #endif
  75     return 0;
  76 }
  77
  78 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
  79 {
  80     if (to->type == EVP_PKEY_NONE) {
  81         if (EVP_PKEY_set_type(to, from->type) == 0)
  82             return 0;
  83     } else if (to->type != from->type) {
  84         EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
  85         goto err;
  86     }
  87
  88     if (EVP_PKEY_missing_parameters(from)) {
  89         EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
  90         goto err;
  91     }
  92
  93     if (!EVP_PKEY_missing_parameters(to)) {
  94         if (EVP_PKEY_cmp_parameters(to, from) == 1)
  95             return 1;
  96         EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_PARAMETERS);
  97         return 0;
  98     }
  99
 100     if (from->ameth && from->ameth->param_copy)
 101         return from->ameth->param_copy(to, from);
 102  err:
 103     return 0;
 104 }
 105
 106 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
 107 {
 108     if (pkey->ameth && pkey->ameth->param_missing)
 109         return pkey->ameth->param_missing(pkey);
 110     return 0;
 111 }
 112
 113 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 114 {
 115     if (a->type != b->type)
 116         return -1;
 117     if (a->ameth && a->ameth->param_cmp)
 118         return a->ameth->param_cmp(a, b);
 119     return -2;
 120 }
 121
 122 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 123 {
 124     if (a->type != b->type)
 125         return -1;
 126
 127     if (a->ameth) {
 128         int ret;
 129         /* Compare parameters if the algorithm has them */
 130         if (a->ameth->param_cmp) {
 131             ret = a->ameth->param_cmp(a, b);
 132             if (ret <= 0)
 133                 return ret;
 134         }
 135
 136         if (a->ameth->pub_cmp)
 137             return a->ameth->pub_cmp(a, b);
 138     }
 139
 140     return -2;
 141 }
 142
 143 EVP_PKEY *EVP_PKEY_new(void)
 144 {
 145     EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
 146
 147     if (ret == NULL) {
 148         EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
 149         return NULL;
 150     }
 151     ret->type = EVP_PKEY_NONE;
 152     ret->save_type = EVP_PKEY_NONE;
 153     ret->references = 1;
 154     ret->save_parameters = 1;
 155     ret->lock = CRYPTO_THREAD_lock_new();
 156     if (ret->lock == NULL) {
 157         EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
 158         OPENSSL_free(ret);
 159         return NULL;
 160     }
 161     return ret;
 162 }
 163
 164 int EVP_PKEY_up_ref(EVP_PKEY *pkey)
 165 {
 166     int i;
 167
 168     if (CRYPTO_UP_REF(&pkey->references, &i, pkey->lock) <= 0)
 169         return 0;
 170
 171     REF_PRINT_COUNT("EVP_PKEY", pkey);
 172     REF_ASSERT_ISNT(i < 2);
 173     return ((i > 1) ? 1 : 0);
 174 }
 175
 176 /*
 177  * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey
 178  * is NULL just return 1 or 0 if the algorithm exists.
 179  */
 180
 181 static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str,
 182                          int len)
 183 {
 184     const EVP_PKEY_ASN1_METHOD *ameth;
 185     ENGINE **eptr = (e == NULL) ? &e :  NULL;
 186
 187     if (pkey) {
 188         if (pkey->pkey.ptr)
 189             EVP_PKEY_free_it(pkey);
 190         /*
 191          * If key type matches and a method exists then this lookup has
 192          * succeeded once so just indicate success.
 193          */
 194         if ((type == pkey->save_type) && pkey->ameth)
 195             return 1;
 196 #ifndef OPENSSL_NO_ENGINE
 197         /* If we have ENGINEs release them */
 198         ENGINE_finish(pkey->engine);
 199         pkey->engine = NULL;
 200         ENGINE_finish(pkey->pmeth_engine);
 201         pkey->pmeth_engine = NULL;
 202 #endif
 203     }
 204     if (str)
 205         ameth = EVP_PKEY_asn1_find_str(eptr, str, len);
 206     else
 207         ameth = EVP_PKEY_asn1_find(eptr, type);
 208 #ifndef OPENSSL_NO_ENGINE
 209     if (pkey == NULL && eptr != NULL)
 210         ENGINE_finish(e);
 211 #endif
 212     if (ameth == NULL) {
 213         EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
 214         return 0;
 215     }
 216     if (pkey) {
 217         pkey->ameth = ameth;
 218         pkey->engine = e;
 219
 220         pkey->type = pkey->ameth->pkey_id;
 221         pkey->save_type = type;
 222     }
 223     return 1;
 224 }
 225
 226 EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *e,
 227                                        const unsigned char *priv,
 228                                        size_t len)
 229 {
 230     EVP_PKEY *ret = EVP_PKEY_new();
 231
 232     if (ret == NULL
 233             || !pkey_set_type(ret, e, type, NULL, -1)) {
 234         /* EVPerr already called */
 235         goto err;
 236     }
 237
 238     if (ret->ameth->set_priv_key == NULL) {
 239         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PRIVATE_KEY,
 240                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 241         goto err;
 242     }
 243
 244     if (!ret->ameth->set_priv_key(ret, priv, len)) {
 245         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PRIVATE_KEY, EVP_R_KEY_SETUP_FAILED);
 246         goto err;
 247     }
 248
 249     return ret;
 250
 251  err:
 252     EVP_PKEY_free(ret);
 253     return NULL;
 254 }
 255
 256 EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *e,
 257                                       const unsigned char *pub,
 258                                       size_t len)
 259 {
 260     EVP_PKEY *ret = EVP_PKEY_new();
 261
 262     if (ret == NULL
 263             || !pkey_set_type(ret, e, type, NULL, -1)) {
 264         /* EVPerr already called */
 265         goto err;
 266     }
 267
 268     if (ret->ameth->set_pub_key == NULL) {
 269         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PUBLIC_KEY,
 270                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 271         goto err;
 272     }
 273
 274     if (!ret->ameth->set_pub_key(ret, pub, len)) {
 275         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PUBLIC_KEY, EVP_R_KEY_SETUP_FAILED);
 276         goto err;
 277     }
 278
 279     return ret;
 280
 281  err:
 282     EVP_PKEY_free(ret);
 283     return NULL;
 284 }
 285
 286 int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, unsigned char *priv,
 287                                  size_t *len)
 288 {
 289      if (pkey->ameth->get_priv_key == NULL) {
 290         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PRIVATE_KEY,
 291                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 292         return 0;
 293     }
 294
 295     if (!pkey->ameth->get_priv_key(pkey, priv, len)) {
 296         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PRIVATE_KEY, EVP_R_GET_RAW_KEY_FAILED);
 297         return 0;
 298     }
 299
 300     return 1;
 301 }
 302
 303 int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub,
 304                                 size_t *len)
 305 {
 306      if (pkey->ameth->get_pub_key == NULL) {
 307         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY,
 308                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 309         return 0;
 310     }
 311
 312     if (!pkey->ameth->get_pub_key(pkey, pub, len)) {
 313         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY, EVP_R_GET_RAW_KEY_FAILED);
 314         return 0;
 315     }
 316
 317     return 1;
 318 }
 319
 320 EVP_PKEY *EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv,
 321                                 size_t len, const EVP_CIPHER *cipher)
 322 {
 323 #ifndef OPENSSL_NO_CMAC
 324 # ifndef OPENSSL_NO_ENGINE
 325     const char *engine_id = e != NULL ? ENGINE_get_id(e) : NULL;
 326 # endif
 327     const char *cipher_name = EVP_CIPHER_name(cipher);
 328     const OSSL_PROVIDER *prov = EVP_CIPHER_provider(cipher);
 329     OPENSSL_CTX *libctx =
 330         prov == NULL ? NULL : ossl_provider_library_context(prov);
 331     EVP_PKEY *ret = EVP_PKEY_new();
 332     EVP_MAC *cmac = EVP_MAC_fetch(libctx, OSSL_MAC_NAME_CMAC, NULL);
 333     EVP_MAC_CTX *cmctx = cmac != NULL ? EVP_MAC_CTX_new(cmac) : NULL;
 334     OSSL_PARAM params[4];
 335     size_t paramsn = 0;
 336
 337     if (ret == NULL
 338             || cmctx == NULL
 339             || !pkey_set_type(ret, e, EVP_PKEY_CMAC, NULL, -1)) {
 340         /* EVPerr already called */
 341         goto err;
 342     }
 343
 344 # ifndef OPENSSL_NO_ENGINE
 345     if (engine_id != NULL)
 346         params[paramsn++] =
 347             OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_ENGINE,
 348                                              (char *)engine_id, 0);
 349 # endif
 350
 351     params[paramsn++] =
 352         OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_CIPHER,
 353                                          (char *)cipher_name, 0);
 354     params[paramsn++] =
 355         OSSL_PARAM_construct_octet_string(OSSL_MAC_PARAM_KEY,
 356                                           (char *)priv, len);
 357     params[paramsn] = OSSL_PARAM_construct_end();
 358
 359     if (!EVP_MAC_CTX_set_params(cmctx, params)) {
 360         EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY, EVP_R_KEY_SETUP_FAILED);
 361         goto err;
 362     }
 363
 364     ret->pkey.ptr = cmctx;
 365     return ret;
 366
 367  err:
 368     EVP_PKEY_free(ret);
 369     EVP_MAC_CTX_free(cmctx);
 370     EVP_MAC_free(cmac);
 371     return NULL;
 372 #else
 373     EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY,
 374            EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 375     return NULL;
 376 #endif
 377 }
 378
 379 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
 380 {
 381     return pkey_set_type(pkey, NULL, type, NULL, -1);
 382 }
 383
 384 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
 385 {
 386     return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, str, len);
 387 }
 388
 389 int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type)
 390 {
 391     if (pkey->type == type) {
 392         return 1; /* it already is that type */
 393     }
 394
 395     /*
 396      * The application is requesting to alias this to a different pkey type,
 397      * but not one that resolves to the base type.
 398      */
 399     if (EVP_PKEY_type(type) != EVP_PKEY_base_id(pkey)) {
 400         EVPerr(EVP_F_EVP_PKEY_SET_ALIAS_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
 401         return 0;
 402     }
 403
 404     pkey->type = type;
 405     return 1;
 406 }
 407
 408 #ifndef OPENSSL_NO_ENGINE
 409 int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e)
 410 {
 411     if (e != NULL) {
 412         if (!ENGINE_init(e)) {
 413             EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, ERR_R_ENGINE_LIB);
 414             return 0;
 415         }
 416         if (ENGINE_get_pkey_meth(e, pkey->type) == NULL) {
 417             ENGINE_finish(e);
 418             EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, EVP_R_UNSUPPORTED_ALGORITHM);
 419             return 0;
 420         }
 421     }
 422     ENGINE_finish(pkey->pmeth_engine);
 423     pkey->pmeth_engine = e;
 424     return 1;
 425 }
 426
 427 ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey)
 428 {
 429     return pkey->engine;
 430 }
 431 #endif
 432 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
 433 {
 434     if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
 435         return 0;
 436     pkey->pkey.ptr = key;
 437     return (key != NULL);
 438 }
 439
 440 void *EVP_PKEY_get0(const EVP_PKEY *pkey)
 441 {
 442     return pkey->pkey.ptr;
 443 }
 444
 445 const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
 446 {
 447     ASN1_OCTET_STRING *os = NULL;
 448     if (pkey->type != EVP_PKEY_HMAC) {
 449         EVPerr(EVP_F_EVP_PKEY_GET0_HMAC, EVP_R_EXPECTING_AN_HMAC_KEY);
 450         return NULL;
 451     }
 452     os = EVP_PKEY_get0(pkey);
 453     *len = os->length;
 454     return os->data;
 455 }
 456
 457 #ifndef OPENSSL_NO_POLY1305
 458 const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len)
 459 {
 460     ASN1_OCTET_STRING *os = NULL;
 461     if (pkey->type != EVP_PKEY_POLY1305) {
 462         EVPerr(EVP_F_EVP_PKEY_GET0_POLY1305, EVP_R_EXPECTING_A_POLY1305_KEY);
 463         return NULL;
 464     }
 465     os = EVP_PKEY_get0(pkey);
 466     *len = os->length;
 467     return os->data;
 468 }
 469 #endif
 470
 471 #ifndef OPENSSL_NO_SIPHASH
 472 const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len)
 473 {
 474     ASN1_OCTET_STRING *os = NULL;
 475
 476     if (pkey->type != EVP_PKEY_SIPHASH) {
 477         EVPerr(EVP_F_EVP_PKEY_GET0_SIPHASH, EVP_R_EXPECTING_A_SIPHASH_KEY);
 478         return NULL;
 479     }
 480     os = EVP_PKEY_get0(pkey);
 481     *len = os->length;
 482     return os->data;
 483 }
 484 #endif
 485
 486 #ifndef OPENSSL_NO_RSA
 487 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
 488 {
 489     int ret = EVP_PKEY_assign_RSA(pkey, key);
 490     if (ret)
 491         RSA_up_ref(key);
 492     return ret;
 493 }
 494
 495 RSA *EVP_PKEY_get0_RSA(const EVP_PKEY *pkey)
 496 {
 497     if (pkey->type != EVP_PKEY_RSA) {
 498         EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
 499         return NULL;
 500     }
 501     return pkey->pkey.rsa;
 502 }
 503
 504 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
 505 {
 506     RSA *ret = EVP_PKEY_get0_RSA(pkey);
 507     if (ret != NULL)
 508         RSA_up_ref(ret);
 509     return ret;
 510 }
 511 #endif
 512
 513 #ifndef OPENSSL_NO_DSA
 514 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
 515 {
 516     int ret = EVP_PKEY_assign_DSA(pkey, key);
 517     if (ret)
 518         DSA_up_ref(key);
 519     return ret;
 520 }
 521
 522 DSA *EVP_PKEY_get0_DSA(const EVP_PKEY *pkey)
 523 {
 524     if (pkey->type != EVP_PKEY_DSA) {
 525         EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
 526         return NULL;
 527     }
 528     return pkey->pkey.dsa;
 529 }
 530
 531 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
 532 {
 533     DSA *ret = EVP_PKEY_get0_DSA(pkey);
 534     if (ret != NULL)
 535         DSA_up_ref(ret);
 536     return ret;
 537 }
 538 #endif
 539
 540 #ifndef OPENSSL_NO_EC
 541
 542 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
 543 {
 544     int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
 545     if (ret)
 546         EC_KEY_up_ref(key);
 547     return ret;
 548 }
 549
 550 EC_KEY *EVP_PKEY_get0_EC_KEY(const EVP_PKEY *pkey)
 551 {
 552     if (pkey->type != EVP_PKEY_EC) {
 553         EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
 554         return NULL;
 555     }
 556     return pkey->pkey.ec;
 557 }
 558
 559 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
 560 {
 561     EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
 562     if (ret != NULL)
 563         EC_KEY_up_ref(ret);
 564     return ret;
 565 }
 566 #endif
 567
 568 #ifndef OPENSSL_NO_DH
 569
 570 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
 571 {
 572     int ret = EVP_PKEY_assign_DH(pkey, key);
 573     if (ret)
 574         DH_up_ref(key);
 575     return ret;
 576 }
 577
 578 DH *EVP_PKEY_get0_DH(const EVP_PKEY *pkey)
 579 {
 580     if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
 581         EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
 582         return NULL;
 583     }
 584     return pkey->pkey.dh;
 585 }
 586
 587 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
 588 {
 589     DH *ret = EVP_PKEY_get0_DH(pkey);
 590     if (ret != NULL)
 591         DH_up_ref(ret);
 592     return ret;
 593 }
 594 #endif
 595
 596 int EVP_PKEY_type(int type)
 597 {
 598     int ret;
 599     const EVP_PKEY_ASN1_METHOD *ameth;
 600     ENGINE *e;
 601     ameth = EVP_PKEY_asn1_find(&e, type);
 602     if (ameth)
 603         ret = ameth->pkey_id;
 604     else
 605         ret = NID_undef;
 606 #ifndef OPENSSL_NO_ENGINE
 607     ENGINE_finish(e);
 608 #endif
 609     return ret;
 610 }
 611
 612 int EVP_PKEY_id(const EVP_PKEY *pkey)
 613 {
 614     return pkey->type;
 615 }
 616
 617 int EVP_PKEY_base_id(const EVP_PKEY *pkey)
 618 {
 619     return EVP_PKEY_type(pkey->type);
 620 }
 621
 622 void EVP_PKEY_free(EVP_PKEY *x)
 623 {
 624     int i;
 625
 626     if (x == NULL)
 627         return;
 628
 629     CRYPTO_DOWN_REF(&x->references, &i, x->lock);
 630     REF_PRINT_COUNT("EVP_PKEY", x);
 631     if (i > 0)
 632         return;
 633     REF_ASSERT_ISNT(i < 0);
 634     EVP_PKEY_free_it(x);
 635     CRYPTO_THREAD_lock_free(x->lock);
 636     sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
 637     OPENSSL_free(x);
 638 }
 639
 640 static void EVP_PKEY_free_it(EVP_PKEY *x)
 641 {
 642     /* internal function; x is never NULL */
 643
 644     evp_keymgmt_clear_pkey_cache(x);
 645
 646     if (x->ameth && x->ameth->pkey_free) {
 647         x->ameth->pkey_free(x);
 648         x->pkey.ptr = NULL;
 649     }
 650 #ifndef OPENSSL_NO_ENGINE
 651     ENGINE_finish(x->engine);
 652     x->engine = NULL;
 653     ENGINE_finish(x->pmeth_engine);
 654     x->pmeth_engine = NULL;
 655 #endif
 656 }
 657
 658 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
 659                      const char *kstr)
 660 {
 661     BIO_indent(out, indent, 128);
 662     BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
 663                kstr, OBJ_nid2ln(pkey->type));
 664     return 1;
 665 }
 666
 667 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
 668                           int indent, ASN1_PCTX *pctx)
 669 {
 670     if (pkey->ameth && pkey->ameth->pub_print)
 671         return pkey->ameth->pub_print(out, pkey, indent, pctx);
 672
 673     return unsup_alg(out, pkey, indent, "Public Key");
 674 }
 675
 676 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
 677                            int indent, ASN1_PCTX *pctx)
 678 {
 679     if (pkey->ameth && pkey->ameth->priv_print)
 680         return pkey->ameth->priv_print(out, pkey, indent, pctx);
 681
 682     return unsup_alg(out, pkey, indent, "Private Key");
 683 }
 684
 685 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
 686                           int indent, ASN1_PCTX *pctx)
 687 {
 688     if (pkey->ameth && pkey->ameth->param_print)
 689         return pkey->ameth->param_print(out, pkey, indent, pctx);
 690     return unsup_alg(out, pkey, indent, "Parameters");
 691 }
 692
 693 static int evp_pkey_asn1_ctrl(EVP_PKEY *pkey, int op, int arg1, void *arg2)
 694 {
 695     if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL)
 696         return -2;
 697     return pkey->ameth->pkey_ctrl(pkey, op, arg1, arg2);
 698 }
 699
 700 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
 701 {
 702     return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid);
 703 }
 704
 705 int EVP_PKEY_supports_digest_nid(EVP_PKEY *pkey, int nid)
 706 {
 707     int rv, default_nid;
 708
 709     rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SUPPORTS_MD_NID, nid, NULL);
 710     if (rv == -2) {
 711         /*
 712          * If there is a mandatory default digest and this isn't it, then
 713          * the answer is 'no'.
 714          */
 715         rv = EVP_PKEY_get_default_digest_nid(pkey, &default_nid);
 716         if (rv == 2)
 717             return (nid == default_nid);
 718         /* zero is an error from EVP_PKEY_get_default_digest_nid() */
 719         if (rv == 0)
 720             return -1;
 721     }
 722     return rv;
 723 }
 724
 725 int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
 726                                const unsigned char *pt, size_t ptlen)
 727 {
 728     if (ptlen > INT_MAX)
 729         return 0;
 730     if (evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SET1_TLS_ENCPT, ptlen,
 731                            (void *)pt) <= 0)
 732         return 0;
 733     return 1;
 734 }
 735
 736 size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt)
 737 {
 738     int rv;
 739     rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_GET1_TLS_ENCPT, 0, ppt);
 740     if (rv <= 0)
 741         return 0;
 742     return rv;
 743 }