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     const char *engine_name = e != NULL ? ENGINE_get_name(e) : NULL;
 325     const char *cipher_name = EVP_CIPHER_name(cipher);
 326     const OSSL_PROVIDER *prov = EVP_CIPHER_provider(cipher);
 327     OPENSSL_CTX *libctx =
 328         prov == NULL ? NULL : ossl_provider_library_context(prov);
 329     EVP_PKEY *ret = EVP_PKEY_new();
 330     EVP_MAC *cmac = EVP_MAC_fetch(libctx, "CMAC", NULL);
 331     EVP_MAC_CTX *cmctx = cmac != NULL ? EVP_MAC_CTX_new(cmac) : NULL;
 332     OSSL_PARAM params[4];
 333     size_t paramsn = 0;
 334
 335     if (ret == NULL
 336             || cmctx == NULL
 337             || !pkey_set_type(ret, e, EVP_PKEY_CMAC, NULL, -1)) {
 338         /* EVPerr already called */
 339         goto err;
 340     }
 341
 342     if (engine_name != NULL)
 343         params[paramsn++] =
 344             OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_ENGINE,
 345                                              (char *)engine_name,
 346                                              strlen(engine_name) + 1);
 347     params[paramsn++] =
 348         OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_ALGORITHM,
 349                                          (char *)cipher_name,
 350                                          strlen(cipher_name) + 1);
 351     params[paramsn++] =
 352         OSSL_PARAM_construct_octet_string(OSSL_MAC_PARAM_KEY,
 353                                           (char *)priv, len);
 354     params[paramsn] = OSSL_PARAM_construct_end();
 355
 356     if (!EVP_MAC_CTX_set_params(cmctx, params)) {
 357         EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY, EVP_R_KEY_SETUP_FAILED);
 358         goto err;
 359     }
 360
 361     ret->pkey.ptr = cmctx;
 362     return ret;
 363
 364  err:
 365     EVP_PKEY_free(ret);
 366     EVP_MAC_CTX_free(cmctx);
 367     EVP_MAC_free(cmac);
 368     return NULL;
 369 #else
 370     EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY,
 371            EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 372     return NULL;
 373 #endif
 374 }
 375
 376 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
 377 {
 378     return pkey_set_type(pkey, NULL, type, NULL, -1);
 379 }
 380
 381 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
 382 {
 383     return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, str, len);
 384 }
 385
 386 int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type)
 387 {
 388     if (pkey->type == type) {
 389         return 1; /* it already is that type */
 390     }
 391
 392     /*
 393      * The application is requesting to alias this to a different pkey type,
 394      * but not one that resolves to the base type.
 395      */
 396     if (EVP_PKEY_type(type) != EVP_PKEY_base_id(pkey)) {
 397         EVPerr(EVP_F_EVP_PKEY_SET_ALIAS_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
 398         return 0;
 399     }
 400
 401     pkey->type = type;
 402     return 1;
 403 }
 404
 405 #ifndef OPENSSL_NO_ENGINE
 406 int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e)
 407 {
 408     if (e != NULL) {
 409         if (!ENGINE_init(e)) {
 410             EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, ERR_R_ENGINE_LIB);
 411             return 0;
 412         }
 413         if (ENGINE_get_pkey_meth(e, pkey->type) == NULL) {
 414             ENGINE_finish(e);
 415             EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, EVP_R_UNSUPPORTED_ALGORITHM);
 416             return 0;
 417         }
 418     }
 419     ENGINE_finish(pkey->pmeth_engine);
 420     pkey->pmeth_engine = e;
 421     return 1;
 422 }
 423
 424 ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey)
 425 {
 426     return pkey->engine;
 427 }
 428 #endif
 429 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
 430 {
 431     if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
 432         return 0;
 433     pkey->pkey.ptr = key;
 434     return (key != NULL);
 435 }
 436
 437 void *EVP_PKEY_get0(const EVP_PKEY *pkey)
 438 {
 439     return pkey->pkey.ptr;
 440 }
 441
 442 const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
 443 {
 444     ASN1_OCTET_STRING *os = NULL;
 445     if (pkey->type != EVP_PKEY_HMAC) {
 446         EVPerr(EVP_F_EVP_PKEY_GET0_HMAC, EVP_R_EXPECTING_AN_HMAC_KEY);
 447         return NULL;
 448     }
 449     os = EVP_PKEY_get0(pkey);
 450     *len = os->length;
 451     return os->data;
 452 }
 453
 454 #ifndef OPENSSL_NO_POLY1305
 455 const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len)
 456 {
 457     ASN1_OCTET_STRING *os = NULL;
 458     if (pkey->type != EVP_PKEY_POLY1305) {
 459         EVPerr(EVP_F_EVP_PKEY_GET0_POLY1305, EVP_R_EXPECTING_A_POLY1305_KEY);
 460         return NULL;
 461     }
 462     os = EVP_PKEY_get0(pkey);
 463     *len = os->length;
 464     return os->data;
 465 }
 466 #endif
 467
 468 #ifndef OPENSSL_NO_SIPHASH
 469 const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len)
 470 {
 471     ASN1_OCTET_STRING *os = NULL;
 472
 473     if (pkey->type != EVP_PKEY_SIPHASH) {
 474         EVPerr(EVP_F_EVP_PKEY_GET0_SIPHASH, EVP_R_EXPECTING_A_SIPHASH_KEY);
 475         return NULL;
 476     }
 477     os = EVP_PKEY_get0(pkey);
 478     *len = os->length;
 479     return os->data;
 480 }
 481 #endif
 482
 483 #ifndef OPENSSL_NO_RSA
 484 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
 485 {
 486     int ret = EVP_PKEY_assign_RSA(pkey, key);
 487     if (ret)
 488         RSA_up_ref(key);
 489     return ret;
 490 }
 491
 492 RSA *EVP_PKEY_get0_RSA(const EVP_PKEY *pkey)
 493 {
 494     if (pkey->type != EVP_PKEY_RSA) {
 495         EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
 496         return NULL;
 497     }
 498     return pkey->pkey.rsa;
 499 }
 500
 501 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
 502 {
 503     RSA *ret = EVP_PKEY_get0_RSA(pkey);
 504     if (ret != NULL)
 505         RSA_up_ref(ret);
 506     return ret;
 507 }
 508 #endif
 509
 510 #ifndef OPENSSL_NO_DSA
 511 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
 512 {
 513     int ret = EVP_PKEY_assign_DSA(pkey, key);
 514     if (ret)
 515         DSA_up_ref(key);
 516     return ret;
 517 }
 518
 519 DSA *EVP_PKEY_get0_DSA(const EVP_PKEY *pkey)
 520 {
 521     if (pkey->type != EVP_PKEY_DSA) {
 522         EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
 523         return NULL;
 524     }
 525     return pkey->pkey.dsa;
 526 }
 527
 528 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
 529 {
 530     DSA *ret = EVP_PKEY_get0_DSA(pkey);
 531     if (ret != NULL)
 532         DSA_up_ref(ret);
 533     return ret;
 534 }
 535 #endif
 536
 537 #ifndef OPENSSL_NO_EC
 538
 539 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
 540 {
 541     int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
 542     if (ret)
 543         EC_KEY_up_ref(key);
 544     return ret;
 545 }
 546
 547 EC_KEY *EVP_PKEY_get0_EC_KEY(const EVP_PKEY *pkey)
 548 {
 549     if (pkey->type != EVP_PKEY_EC) {
 550         EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
 551         return NULL;
 552     }
 553     return pkey->pkey.ec;
 554 }
 555
 556 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
 557 {
 558     EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
 559     if (ret != NULL)
 560         EC_KEY_up_ref(ret);
 561     return ret;
 562 }
 563 #endif
 564
 565 #ifndef OPENSSL_NO_DH
 566
 567 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
 568 {
 569     int ret = EVP_PKEY_assign_DH(pkey, key);
 570     if (ret)
 571         DH_up_ref(key);
 572     return ret;
 573 }
 574
 575 DH *EVP_PKEY_get0_DH(const EVP_PKEY *pkey)
 576 {
 577     if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
 578         EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
 579         return NULL;
 580     }
 581     return pkey->pkey.dh;
 582 }
 583
 584 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
 585 {
 586     DH *ret = EVP_PKEY_get0_DH(pkey);
 587     if (ret != NULL)
 588         DH_up_ref(ret);
 589     return ret;
 590 }
 591 #endif
 592
 593 int EVP_PKEY_type(int type)
 594 {
 595     int ret;
 596     const EVP_PKEY_ASN1_METHOD *ameth;
 597     ENGINE *e;
 598     ameth = EVP_PKEY_asn1_find(&e, type);
 599     if (ameth)
 600         ret = ameth->pkey_id;
 601     else
 602         ret = NID_undef;
 603 #ifndef OPENSSL_NO_ENGINE
 604     ENGINE_finish(e);
 605 #endif
 606     return ret;
 607 }
 608
 609 int EVP_PKEY_id(const EVP_PKEY *pkey)
 610 {
 611     return pkey->type;
 612 }
 613
 614 int EVP_PKEY_base_id(const EVP_PKEY *pkey)
 615 {
 616     return EVP_PKEY_type(pkey->type);
 617 }
 618
 619 void EVP_PKEY_free(EVP_PKEY *x)
 620 {
 621     int i;
 622
 623     if (x == NULL)
 624         return;
 625
 626     CRYPTO_DOWN_REF(&x->references, &i, x->lock);
 627     REF_PRINT_COUNT("EVP_PKEY", x);
 628     if (i > 0)
 629         return;
 630     REF_ASSERT_ISNT(i < 0);
 631     EVP_PKEY_free_it(x);
 632     CRYPTO_THREAD_lock_free(x->lock);
 633     sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
 634     OPENSSL_free(x);
 635 }
 636
 637 static void EVP_PKEY_free_it(EVP_PKEY *x)
 638 {
 639     /* internal function; x is never NULL */
 640
 641     evp_keymgmt_clear_pkey_cache(x);
 642
 643     if (x->ameth && x->ameth->pkey_free) {
 644         x->ameth->pkey_free(x);
 645         x->pkey.ptr = NULL;
 646     }
 647 #ifndef OPENSSL_NO_ENGINE
 648     ENGINE_finish(x->engine);
 649     x->engine = NULL;
 650     ENGINE_finish(x->pmeth_engine);
 651     x->pmeth_engine = NULL;
 652 #endif
 653 }
 654
 655 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
 656                      const char *kstr)
 657 {
 658     BIO_indent(out, indent, 128);
 659     BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
 660                kstr, OBJ_nid2ln(pkey->type));
 661     return 1;
 662 }
 663
 664 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
 665                           int indent, ASN1_PCTX *pctx)
 666 {
 667     if (pkey->ameth && pkey->ameth->pub_print)
 668         return pkey->ameth->pub_print(out, pkey, indent, pctx);
 669
 670     return unsup_alg(out, pkey, indent, "Public Key");
 671 }
 672
 673 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
 674                            int indent, ASN1_PCTX *pctx)
 675 {
 676     if (pkey->ameth && pkey->ameth->priv_print)
 677         return pkey->ameth->priv_print(out, pkey, indent, pctx);
 678
 679     return unsup_alg(out, pkey, indent, "Private Key");
 680 }
 681
 682 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
 683                           int indent, ASN1_PCTX *pctx)
 684 {
 685     if (pkey->ameth && pkey->ameth->param_print)
 686         return pkey->ameth->param_print(out, pkey, indent, pctx);
 687     return unsup_alg(out, pkey, indent, "Parameters");
 688 }
 689
 690 static int evp_pkey_asn1_ctrl(EVP_PKEY *pkey, int op, int arg1, void *arg2)
 691 {
 692     if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL)
 693         return -2;
 694     return pkey->ameth->pkey_ctrl(pkey, op, arg1, arg2);
 695 }
 696
 697 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
 698 {
 699     return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid);
 700 }
 701
 702 int EVP_PKEY_supports_digest_nid(EVP_PKEY *pkey, int nid)
 703 {
 704     int rv, default_nid;
 705
 706     rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SUPPORTS_MD_NID, nid, NULL);
 707     if (rv == -2) {
 708         /*
 709          * If there is a mandatory default digest and this isn't it, then
 710          * the answer is 'no'.
 711          */
 712         rv = EVP_PKEY_get_default_digest_nid(pkey, &default_nid);
 713         if (rv == 2)
 714             return (nid == default_nid);
 715         /* zero is an error from EVP_PKEY_get_default_digest_nid() */
 716         if (rv == 0)
 717             return -1;
 718     }
 719     return rv;
 720 }
 721
 722 int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
 723                                const unsigned char *pt, size_t ptlen)
 724 {
 725     if (ptlen > INT_MAX)
 726         return 0;
 727     if (evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SET1_TLS_ENCPT, ptlen,
 728                            (void *)pt) <= 0)
 729         return 0;
 730     return 1;
 731 }
 732
 733 size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt)
 734 {
 735     int rv;
 736     rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_GET1_TLS_ENCPT, 0, ppt);
 737     if (rv <= 0)
 738         return 0;
 739     return rv;
 740 }