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 /*
  11  * DSA low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <stdio.h>
  17 #include "internal/cryptlib.h"
  18 #include "internal/refcount.h"
  19 #include <openssl/bn.h>
  20 #include <openssl/err.h>
  21 #include <openssl/objects.h>
  22 #include <openssl/evp.h>
  23 #include <openssl/x509.h>
  24 #include <openssl/rsa.h>
  25 #include <openssl/dsa.h>
  26 #include <openssl/dh.h>
  27 #include <openssl/cmac.h>
  28 #include <openssl/engine.h>
  29 #include <openssl/params.h>
  30 #include <openssl/serializer.h>
  31 #include <openssl/core_names.h>
  32
  33 #include "crypto/asn1.h"
  34 #include "crypto/evp.h"
  35 #include "internal/provider.h"
  36 #include "evp_local.h"
  37
  38 static void evp_pkey_free_it(EVP_PKEY *key);
  39
  40 #ifndef FIPS_MODE
  41
  42 int EVP_PKEY_bits(const EVP_PKEY *pkey)
  43 {
  44     if (pkey != NULL) {
  45         if (pkey->ameth == NULL)
  46             return pkey->cache.bits;
  47         else if (pkey->ameth->pkey_bits)
  48             return pkey->ameth->pkey_bits(pkey);
  49     }
  50     return 0;
  51 }
  52
  53 int EVP_PKEY_security_bits(const EVP_PKEY *pkey)
  54 {
  55     if (pkey == NULL)
  56         return 0;
  57     if (pkey->ameth == NULL)
  58         return pkey->cache.security_bits;
  59     if (pkey->ameth->pkey_security_bits == NULL)
  60         return -2;
  61     return pkey->ameth->pkey_security_bits(pkey);
  62 }
  63
  64 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
  65 {
  66 # ifndef OPENSSL_NO_DSA
  67     if (pkey->type == EVP_PKEY_DSA) {
  68         int ret = pkey->save_parameters;
  69
  70         if (mode >= 0)
  71             pkey->save_parameters = mode;
  72         return ret;
  73     }
  74 # endif
  75 # ifndef OPENSSL_NO_EC
  76     if (pkey->type == EVP_PKEY_EC) {
  77         int ret = pkey->save_parameters;
  78
  79         if (mode >= 0)
  80             pkey->save_parameters = mode;
  81         return ret;
  82     }
  83 # endif
  84     return 0;
  85 }
  86
  87 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
  88 {
  89     if (to->type == EVP_PKEY_NONE) {
  90         if (EVP_PKEY_set_type(to, from->type) == 0)
  91             return 0;
  92     } else if (to->type != from->type) {
  93         EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
  94         goto err;
  95     }
  96
  97     if (EVP_PKEY_missing_parameters(from)) {
  98         EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
  99         goto err;
 100     }
 101
 102     if (!EVP_PKEY_missing_parameters(to)) {
 103         if (EVP_PKEY_cmp_parameters(to, from) == 1)
 104             return 1;
 105         EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_PARAMETERS);
 106         return 0;
 107     }
 108
 109     if (from->ameth && from->ameth->param_copy)
 110         return from->ameth->param_copy(to, from);
 111  err:
 112     return 0;
 113 }
 114
 115 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
 116 {
 117     if (pkey != NULL && pkey->ameth && pkey->ameth->param_missing)
 118         return pkey->ameth->param_missing(pkey);
 119     return 0;
 120 }
 121
 122 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 123 {
 124     if (a->type != b->type)
 125         return -1;
 126     if (a->ameth && a->ameth->param_cmp)
 127         return a->ameth->param_cmp(a, b);
 128     return -2;
 129 }
 130
 131 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 132 {
 133     if (a->type != b->type)
 134         return -1;
 135
 136     if (a->ameth) {
 137         int ret;
 138         /* Compare parameters if the algorithm has them */
 139         if (a->ameth->param_cmp) {
 140             ret = a->ameth->param_cmp(a, b);
 141             if (ret <= 0)
 142                 return ret;
 143         }
 144
 145         if (a->ameth->pub_cmp)
 146             return a->ameth->pub_cmp(a, b);
 147     }
 148
 149     return -2;
 150 }
 151
 152
 153 /*
 154  * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey
 155  * is NULL just return 1 or 0 if the algorithm exists.
 156  */
 157
 158 static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str,
 159                          int len)
 160 {
 161     const EVP_PKEY_ASN1_METHOD *ameth;
 162     ENGINE **eptr = (e == NULL) ? &e :  NULL;
 163
 164     if (pkey) {
 165         if (pkey->pkey.ptr)
 166             evp_pkey_free_it(pkey);
 167         /*
 168          * If key type matches and a method exists then this lookup has
 169          * succeeded once so just indicate success.
 170          */
 171         if ((type == pkey->save_type) && pkey->ameth)
 172             return 1;
 173 # ifndef OPENSSL_NO_ENGINE
 174         /* If we have ENGINEs release them */
 175         ENGINE_finish(pkey->engine);
 176         pkey->engine = NULL;
 177         ENGINE_finish(pkey->pmeth_engine);
 178         pkey->pmeth_engine = NULL;
 179 # endif
 180     }
 181     if (str)
 182         ameth = EVP_PKEY_asn1_find_str(eptr, str, len);
 183     else
 184         ameth = EVP_PKEY_asn1_find(eptr, type);
 185 # ifndef OPENSSL_NO_ENGINE
 186     if (pkey == NULL && eptr != NULL)
 187         ENGINE_finish(e);
 188 # endif
 189     if (ameth == NULL) {
 190         EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
 191         return 0;
 192     }
 193     if (pkey) {
 194         pkey->ameth = ameth;
 195         pkey->engine = e;
 196
 197         pkey->type = pkey->ameth->pkey_id;
 198         pkey->save_type = type;
 199     }
 200     return 1;
 201 }
 202
 203 EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *e,
 204                                        const unsigned char *priv,
 205                                        size_t len)
 206 {
 207     EVP_PKEY *ret = EVP_PKEY_new();
 208
 209     if (ret == NULL
 210             || !pkey_set_type(ret, e, type, NULL, -1)) {
 211         /* EVPerr already called */
 212         goto err;
 213     }
 214
 215     if (ret->ameth->set_priv_key == NULL) {
 216         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PRIVATE_KEY,
 217                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 218         goto err;
 219     }
 220
 221     if (!ret->ameth->set_priv_key(ret, priv, len)) {
 222         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PRIVATE_KEY, EVP_R_KEY_SETUP_FAILED);
 223         goto err;
 224     }
 225
 226     return ret;
 227
 228  err:
 229     EVP_PKEY_free(ret);
 230     return NULL;
 231 }
 232
 233 EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *e,
 234                                       const unsigned char *pub,
 235                                       size_t len)
 236 {
 237     EVP_PKEY *ret = EVP_PKEY_new();
 238
 239     if (ret == NULL
 240             || !pkey_set_type(ret, e, type, NULL, -1)) {
 241         /* EVPerr already called */
 242         goto err;
 243     }
 244
 245     if (ret->ameth->set_pub_key == NULL) {
 246         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PUBLIC_KEY,
 247                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 248         goto err;
 249     }
 250
 251     if (!ret->ameth->set_pub_key(ret, pub, len)) {
 252         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PUBLIC_KEY, EVP_R_KEY_SETUP_FAILED);
 253         goto err;
 254     }
 255
 256     return ret;
 257
 258  err:
 259     EVP_PKEY_free(ret);
 260     return NULL;
 261 }
 262
 263 int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, unsigned char *priv,
 264                                  size_t *len)
 265 {
 266      if (pkey->ameth->get_priv_key == NULL) {
 267         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PRIVATE_KEY,
 268                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 269         return 0;
 270     }
 271
 272     if (!pkey->ameth->get_priv_key(pkey, priv, len)) {
 273         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PRIVATE_KEY, EVP_R_GET_RAW_KEY_FAILED);
 274         return 0;
 275     }
 276
 277     return 1;
 278 }
 279
 280 int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub,
 281                                 size_t *len)
 282 {
 283      if (pkey->ameth->get_pub_key == NULL) {
 284         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY,
 285                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 286         return 0;
 287     }
 288
 289     if (!pkey->ameth->get_pub_key(pkey, pub, len)) {
 290         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY, EVP_R_GET_RAW_KEY_FAILED);
 291         return 0;
 292     }
 293
 294     return 1;
 295 }
 296
 297 EVP_PKEY *EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv,
 298                                 size_t len, const EVP_CIPHER *cipher)
 299 {
 300 # ifndef OPENSSL_NO_CMAC
 301 #  ifndef OPENSSL_NO_ENGINE
 302     const char *engine_id = e != NULL ? ENGINE_get_id(e) : NULL;
 303 #  endif
 304     const char *cipher_name = EVP_CIPHER_name(cipher);
 305     const OSSL_PROVIDER *prov = EVP_CIPHER_provider(cipher);
 306     OPENSSL_CTX *libctx =
 307         prov == NULL ? NULL : ossl_provider_library_context(prov);
 308     EVP_PKEY *ret = EVP_PKEY_new();
 309     EVP_MAC *cmac = EVP_MAC_fetch(libctx, OSSL_MAC_NAME_CMAC, NULL);
 310     EVP_MAC_CTX *cmctx = cmac != NULL ? EVP_MAC_CTX_new(cmac) : NULL;
 311     OSSL_PARAM params[4];
 312     size_t paramsn = 0;
 313
 314     if (ret == NULL
 315             || cmctx == NULL
 316             || !pkey_set_type(ret, e, EVP_PKEY_CMAC, NULL, -1)) {
 317         /* EVPerr already called */
 318         goto err;
 319     }
 320
 321 #  ifndef OPENSSL_NO_ENGINE
 322     if (engine_id != NULL)
 323         params[paramsn++] =
 324             OSSL_PARAM_construct_utf8_string("engine", (char *)engine_id, 0);
 325 #  endif
 326
 327     params[paramsn++] =
 328         OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_CIPHER,
 329                                          (char *)cipher_name, 0);
 330     params[paramsn++] =
 331         OSSL_PARAM_construct_octet_string(OSSL_MAC_PARAM_KEY,
 332                                           (char *)priv, len);
 333     params[paramsn] = OSSL_PARAM_construct_end();
 334
 335     if (!EVP_MAC_CTX_set_params(cmctx, params)) {
 336         EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY, EVP_R_KEY_SETUP_FAILED);
 337         goto err;
 338     }
 339
 340     ret->pkey.ptr = cmctx;
 341     return ret;
 342
 343  err:
 344     EVP_PKEY_free(ret);
 345     EVP_MAC_CTX_free(cmctx);
 346     EVP_MAC_free(cmac);
 347     return NULL;
 348 # else
 349     EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY,
 350            EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 351     return NULL;
 352 # endif
 353 }
 354
 355 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
 356 {
 357     return pkey_set_type(pkey, NULL, type, NULL, -1);
 358 }
 359
 360 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
 361 {
 362     return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, str, len);
 363 }
 364
 365 int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type)
 366 {
 367     if (pkey->type == type) {
 368         return 1; /* it already is that type */
 369     }
 370
 371     /*
 372      * The application is requesting to alias this to a different pkey type,
 373      * but not one that resolves to the base type.
 374      */
 375     if (EVP_PKEY_type(type) != EVP_PKEY_base_id(pkey)) {
 376         EVPerr(EVP_F_EVP_PKEY_SET_ALIAS_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
 377         return 0;
 378     }
 379
 380     pkey->type = type;
 381     return 1;
 382 }
 383
 384 # ifndef OPENSSL_NO_ENGINE
 385 int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e)
 386 {
 387     if (e != NULL) {
 388         if (!ENGINE_init(e)) {
 389             EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, ERR_R_ENGINE_LIB);
 390             return 0;
 391         }
 392         if (ENGINE_get_pkey_meth(e, pkey->type) == NULL) {
 393             ENGINE_finish(e);
 394             EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, EVP_R_UNSUPPORTED_ALGORITHM);
 395             return 0;
 396         }
 397     }
 398     ENGINE_finish(pkey->pmeth_engine);
 399     pkey->pmeth_engine = e;
 400     return 1;
 401 }
 402
 403 ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey)
 404 {
 405     return pkey->engine;
 406 }
 407 # endif
 408 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
 409 {
 410     int alias = type;
 411
 412 #ifndef OPENSSL_NO_EC
 413     if (EVP_PKEY_type(type) == EVP_PKEY_EC) {
 414         const EC_GROUP *group = EC_KEY_get0_group(key);
 415
 416         if (group != NULL && EC_GROUP_get_curve_name(group) == NID_sm2)
 417             alias = EVP_PKEY_SM2;
 418     }
 419 #endif
 420
 421     if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
 422         return 0;
 423     if (!EVP_PKEY_set_alias_type(pkey, alias))
 424         return 0;
 425     pkey->pkey.ptr = key;
 426     return (key != NULL);
 427 }
 428
 429 void *EVP_PKEY_get0(const EVP_PKEY *pkey)
 430 {
 431     return pkey->pkey.ptr;
 432 }
 433
 434 const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
 435 {
 436     ASN1_OCTET_STRING *os = NULL;
 437     if (pkey->type != EVP_PKEY_HMAC) {
 438         EVPerr(EVP_F_EVP_PKEY_GET0_HMAC, EVP_R_EXPECTING_AN_HMAC_KEY);
 439         return NULL;
 440     }
 441     os = EVP_PKEY_get0(pkey);
 442     *len = os->length;
 443     return os->data;
 444 }
 445
 446 # ifndef OPENSSL_NO_POLY1305
 447 const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len)
 448 {
 449     ASN1_OCTET_STRING *os = NULL;
 450     if (pkey->type != EVP_PKEY_POLY1305) {
 451         EVPerr(EVP_F_EVP_PKEY_GET0_POLY1305, EVP_R_EXPECTING_A_POLY1305_KEY);
 452         return NULL;
 453     }
 454     os = EVP_PKEY_get0(pkey);
 455     *len = os->length;
 456     return os->data;
 457 }
 458 # endif
 459
 460 # ifndef OPENSSL_NO_SIPHASH
 461 const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len)
 462 {
 463     ASN1_OCTET_STRING *os = NULL;
 464
 465     if (pkey->type != EVP_PKEY_SIPHASH) {
 466         EVPerr(EVP_F_EVP_PKEY_GET0_SIPHASH, EVP_R_EXPECTING_A_SIPHASH_KEY);
 467         return NULL;
 468     }
 469     os = EVP_PKEY_get0(pkey);
 470     *len = os->length;
 471     return os->data;
 472 }
 473 # endif
 474
 475 # ifndef OPENSSL_NO_RSA
 476 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
 477 {
 478     int ret = EVP_PKEY_assign_RSA(pkey, key);
 479     if (ret)
 480         RSA_up_ref(key);
 481     return ret;
 482 }
 483
 484 RSA *EVP_PKEY_get0_RSA(const EVP_PKEY *pkey)
 485 {
 486     if (pkey->type != EVP_PKEY_RSA && pkey->type != EVP_PKEY_RSA_PSS) {
 487         EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
 488         return NULL;
 489     }
 490     return pkey->pkey.rsa;
 491 }
 492
 493 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
 494 {
 495     RSA *ret = EVP_PKEY_get0_RSA(pkey);
 496     if (ret != NULL)
 497         RSA_up_ref(ret);
 498     return ret;
 499 }
 500 # endif
 501
 502 # ifndef OPENSSL_NO_DSA
 503 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
 504 {
 505     int ret = EVP_PKEY_assign_DSA(pkey, key);
 506     if (ret)
 507         DSA_up_ref(key);
 508     return ret;
 509 }
 510
 511 DSA *EVP_PKEY_get0_DSA(const EVP_PKEY *pkey)
 512 {
 513     if (pkey->type != EVP_PKEY_DSA) {
 514         EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
 515         return NULL;
 516     }
 517     return pkey->pkey.dsa;
 518 }
 519
 520 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
 521 {
 522     DSA *ret = EVP_PKEY_get0_DSA(pkey);
 523     if (ret != NULL)
 524         DSA_up_ref(ret);
 525     return ret;
 526 }
 527 # endif
 528
 529 # ifndef OPENSSL_NO_EC
 530
 531 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
 532 {
 533     int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
 534     if (ret)
 535         EC_KEY_up_ref(key);
 536     return ret;
 537 }
 538
 539 EC_KEY *EVP_PKEY_get0_EC_KEY(const EVP_PKEY *pkey)
 540 {
 541     if (EVP_PKEY_base_id(pkey) != EVP_PKEY_EC) {
 542         EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
 543         return NULL;
 544     }
 545     return pkey->pkey.ec;
 546 }
 547
 548 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
 549 {
 550     EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
 551     if (ret != NULL)
 552         EC_KEY_up_ref(ret);
 553     return ret;
 554 }
 555 # endif
 556
 557 # ifndef OPENSSL_NO_DH
 558
 559 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
 560 {
 561     int type = DH_get0_q(key) == NULL ? EVP_PKEY_DH : EVP_PKEY_DHX;
 562     int ret = EVP_PKEY_assign(pkey, type, key);
 563
 564     if (ret)
 565         DH_up_ref(key);
 566     return ret;
 567 }
 568
 569 DH *EVP_PKEY_get0_DH(const EVP_PKEY *pkey)
 570 {
 571     if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
 572         EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
 573         return NULL;
 574     }
 575     return pkey->pkey.dh;
 576 }
 577
 578 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
 579 {
 580     DH *ret = EVP_PKEY_get0_DH(pkey);
 581     if (ret != NULL)
 582         DH_up_ref(ret);
 583     return ret;
 584 }
 585 # endif
 586
 587 int EVP_PKEY_type(int type)
 588 {
 589     int ret;
 590     const EVP_PKEY_ASN1_METHOD *ameth;
 591     ENGINE *e;
 592     ameth = EVP_PKEY_asn1_find(&e, type);
 593     if (ameth)
 594         ret = ameth->pkey_id;
 595     else
 596         ret = NID_undef;
 597 # ifndef OPENSSL_NO_ENGINE
 598     ENGINE_finish(e);
 599 # endif
 600     return ret;
 601 }
 602
 603 int EVP_PKEY_id(const EVP_PKEY *pkey)
 604 {
 605     return pkey->type;
 606 }
 607
 608 int EVP_PKEY_base_id(const EVP_PKEY *pkey)
 609 {
 610     return EVP_PKEY_type(pkey->type);
 611 }
 612
 613
 614 static int print_reset_indent(BIO **out, int pop_f_prefix, long saved_indent)
 615 {
 616     BIO_set_indent(*out, saved_indent);
 617     if (pop_f_prefix) {
 618         BIO *next = BIO_pop(*out);
 619
 620         BIO_free(*out);
 621         *out = next;
 622     }
 623     return 1;
 624 }
 625
 626 static int print_set_indent(BIO **out, int *pop_f_prefix, long *saved_indent,
 627                             long indent)
 628 {
 629     *pop_f_prefix = 0;
 630     *saved_indent = 0;
 631     if (indent > 0) {
 632         long i = BIO_get_indent(*out);
 633
 634         *saved_indent =  (i < 0 ? 0 : i);
 635         if (BIO_set_indent(*out, indent) <= 0) {
 636             if ((*out = BIO_push(BIO_new(BIO_f_prefix()), *out)) == NULL)
 637                 return 0;
 638             *pop_f_prefix = 1;
 639         }
 640         if (BIO_set_indent(*out, indent) <= 0) {
 641             print_reset_indent(out, *pop_f_prefix, *saved_indent);
 642             return 0;
 643         }
 644     }
 645     return 1;
 646 }
 647
 648 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
 649                      const char *kstr)
 650 {
 651     return BIO_indent(out, indent, 128)
 652         && BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
 653                       kstr, OBJ_nid2ln(pkey->type)) > 0;
 654 }
 655
 656 static int print_pkey(const EVP_PKEY *pkey, BIO *out, int indent,
 657                       const char *propquery /* For provided serialization */,
 658                       int (*legacy_print)(BIO *out, const EVP_PKEY *pkey,
 659                                           int indent, ASN1_PCTX *pctx),
 660                       ASN1_PCTX *legacy_pctx /* For legacy print */)
 661 {
 662     int pop_f_prefix;
 663     long saved_indent;
 664     OSSL_SERIALIZER_CTX *ctx = NULL;
 665     int ret = -2;                /* default to unsupported */
 666
 667     if (!print_set_indent(&out, &pop_f_prefix, &saved_indent, indent))
 668         return 0;
 669
 670     ctx = OSSL_SERIALIZER_CTX_new_by_EVP_PKEY(pkey, propquery);
 671     if (OSSL_SERIALIZER_CTX_get_serializer(ctx) != NULL)
 672         ret = OSSL_SERIALIZER_to_bio(ctx, out);
 673     OSSL_SERIALIZER_CTX_free(ctx);
 674
 675     if (ret != -2)
 676         goto end;
 677
 678     /* legacy fallback */
 679     if (legacy_print != NULL)
 680         ret = legacy_print(out, pkey, 0, legacy_pctx);
 681     else
 682         ret = unsup_alg(out, pkey, 0, "Public Key");
 683
 684  end:
 685     print_reset_indent(&out, pop_f_prefix, saved_indent);
 686     return ret;
 687 }
 688
 689 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
 690                           int indent, ASN1_PCTX *pctx)
 691 {
 692     return print_pkey(pkey, out, indent, OSSL_SERIALIZER_PUBKEY_TO_TEXT_PQ,
 693                       (pkey->ameth != NULL ? pkey->ameth->pub_print : NULL),
 694                       pctx);
 695 }
 696
 697 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
 698                            int indent, ASN1_PCTX *pctx)
 699 {
 700     return print_pkey(pkey, out, indent, OSSL_SERIALIZER_PrivateKey_TO_TEXT_PQ,
 701                       (pkey->ameth != NULL ? pkey->ameth->priv_print : NULL),
 702                       pctx);
 703 }
 704
 705 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
 706                           int indent, ASN1_PCTX *pctx)
 707 {
 708     return print_pkey(pkey, out, indent, OSSL_SERIALIZER_Parameters_TO_TEXT_PQ,
 709                       (pkey->ameth != NULL ? pkey->ameth->param_print : NULL),
 710                       pctx);
 711 }
 712
 713 static int legacy_asn1_ctrl_to_param(EVP_PKEY *pkey, int op,
 714                                      int arg1, void *arg2)
 715 {
 716     if (pkey->pkeys[0].keymgmt == NULL)
 717         return 0;
 718     switch (op) {
 719     case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 720         {
 721             char mdname[80] = "";
 722             int nid;
 723             int rv = EVP_PKEY_get_default_digest_name(pkey, mdname,
 724                                                       sizeof(mdname));
 725
 726             if (rv <= 0)
 727                 return rv;
 728             nid = OBJ_sn2nid(mdname);
 729             if (nid == NID_undef)
 730                 nid = OBJ_ln2nid(mdname);
 731             if (nid == NID_undef)
 732                 return 0;
 733             *(int *)arg2 = nid;
 734             return 1;
 735         }
 736     default:
 737         return -2;
 738     }
 739 }
 740
 741 static int evp_pkey_asn1_ctrl(EVP_PKEY *pkey, int op, int arg1, void *arg2)
 742 {
 743     if (pkey->ameth == NULL)
 744         return legacy_asn1_ctrl_to_param(pkey, op, arg1, arg2);
 745     if (pkey->ameth->pkey_ctrl == NULL)
 746         return -2;
 747     return pkey->ameth->pkey_ctrl(pkey, op, arg1, arg2);
 748 }
 749
 750 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
 751 {
 752     return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid);
 753 }
 754
 755 int EVP_PKEY_get_default_digest_name(EVP_PKEY *pkey,
 756                                      char *mdname, size_t mdname_sz)
 757 {
 758     if (pkey->ameth == NULL) {
 759         OSSL_PARAM params[3];
 760         char mddefault[100] = "";
 761         char mdmandatory[100] = "";
 762
 763         params[0] =
 764             OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST,
 765                                              mddefault, sizeof(mddefault));
 766         params[1] =
 767             OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_MANDATORY_DIGEST,
 768                                              mdmandatory,
 769                                              sizeof(mdmandatory));
 770         params[2] = OSSL_PARAM_construct_end();
 771         if (!evp_keymgmt_get_params(pkey->pkeys[0].keymgmt,
 772                                     pkey->pkeys[0].keydata,
 773                                     params))
 774             return 0;
 775         if (mdmandatory[0] != '\0') {
 776             OPENSSL_strlcpy(mdname, mdmandatory, mdname_sz);
 777             return 2;
 778         }
 779         OPENSSL_strlcpy(mdname, mddefault, mdname_sz);
 780         return 1;
 781     }
 782
 783     {
 784         int nid = NID_undef;
 785         int rv = EVP_PKEY_get_default_digest_nid(pkey, &nid);
 786         const char *name = rv > 0 ? OBJ_nid2sn(nid) : NULL;
 787
 788         if (rv > 0)
 789             OPENSSL_strlcpy(mdname, name, mdname_sz);
 790         return rv;
 791     }
 792 }
 793
 794 int EVP_PKEY_supports_digest_nid(EVP_PKEY *pkey, int nid)
 795 {
 796     int rv, default_nid;
 797
 798     rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SUPPORTS_MD_NID, nid, NULL);
 799     if (rv == -2) {
 800         /*
 801          * If there is a mandatory default digest and this isn't it, then
 802          * the answer is 'no'.
 803          */
 804         rv = EVP_PKEY_get_default_digest_nid(pkey, &default_nid);
 805         if (rv == 2)
 806             return (nid == default_nid);
 807         /* zero is an error from EVP_PKEY_get_default_digest_nid() */
 808         if (rv == 0)
 809             return -1;
 810     }
 811     return rv;
 812 }
 813
 814 int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
 815                                const unsigned char *pt, size_t ptlen)
 816 {
 817     if (ptlen > INT_MAX)
 818         return 0;
 819     if (evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SET1_TLS_ENCPT, ptlen,
 820                            (void *)pt) <= 0)
 821         return 0;
 822     return 1;
 823 }
 824
 825 size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt)
 826 {
 827     int rv;
 828     rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_GET1_TLS_ENCPT, 0, ppt);
 829     if (rv <= 0)
 830         return 0;
 831     return rv;
 832 }
 833
 834 #endif /* FIPS_MODE */
 835
 836 /*- All methods below can also be used in FIPS_MODE */
 837
 838 EVP_PKEY *EVP_PKEY_new(void)
 839 {
 840     EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
 841
 842     if (ret == NULL) {
 843         EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
 844         return NULL;
 845     }
 846     ret->type = EVP_PKEY_NONE;
 847     ret->save_type = EVP_PKEY_NONE;
 848     ret->references = 1;
 849     ret->save_parameters = 1;
 850     ret->lock = CRYPTO_THREAD_lock_new();
 851     if (ret->lock == NULL) {
 852         EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
 853         OPENSSL_free(ret);
 854         return NULL;
 855     }
 856     return ret;
 857 }
 858
 859 int EVP_PKEY_up_ref(EVP_PKEY *pkey)
 860 {
 861     int i;
 862
 863     if (CRYPTO_UP_REF(&pkey->references, &i, pkey->lock) <= 0)
 864         return 0;
 865
 866     REF_PRINT_COUNT("EVP_PKEY", pkey);
 867     REF_ASSERT_ISNT(i < 2);
 868     return ((i > 1) ? 1 : 0);
 869 }
 870
 871 static void evp_pkey_free_it(EVP_PKEY *x)
 872 {
 873     /* internal function; x is never NULL */
 874
 875     evp_keymgmt_util_clear_pkey_cache(x);
 876
 877     if (x->ameth && x->ameth->pkey_free) {
 878         x->ameth->pkey_free(x);
 879         x->pkey.ptr = NULL;
 880     }
 881 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
 882     ENGINE_finish(x->engine);
 883     x->engine = NULL;
 884     ENGINE_finish(x->pmeth_engine);
 885     x->pmeth_engine = NULL;
 886 #endif
 887 }
 888
 889 void EVP_PKEY_free(EVP_PKEY *x)
 890 {
 891     int i;
 892
 893     if (x == NULL)
 894         return;
 895
 896     CRYPTO_DOWN_REF(&x->references, &i, x->lock);
 897     REF_PRINT_COUNT("EVP_PKEY", x);
 898     if (i > 0)
 899         return;
 900     REF_ASSERT_ISNT(i < 0);
 901     evp_pkey_free_it(x);
 902     CRYPTO_THREAD_lock_free(x->lock);
 903 #ifndef FIPS_MODE
 904     sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
 905 #endif
 906     OPENSSL_free(x);
 907 }
 908
 909 int EVP_PKEY_size(const EVP_PKEY *pkey)
 910 {
 911     if (pkey != NULL) {
 912         if (pkey->ameth == NULL)
 913             return pkey->cache.size;
 914         else if (pkey->ameth->pkey_size != NULL)
 915             return pkey->ameth->pkey_size(pkey);
 916     }
 917     return 0;
 918 }
 919
 920 void *evp_pkey_make_provided(EVP_PKEY *pk, OPENSSL_CTX *libctx,
 921                              EVP_KEYMGMT **keymgmt, const char *propquery)
 922 {
 923     EVP_KEYMGMT *allocated_keymgmt = NULL;
 924     EVP_KEYMGMT *tmp_keymgmt = NULL;
 925     void *keydata = NULL;
 926
 927     if (pk == NULL)
 928         return NULL;
 929
 930     if (keymgmt != NULL) {
 931         tmp_keymgmt = *keymgmt;
 932         *keymgmt = NULL;
 933     }
 934
 935     if (tmp_keymgmt == NULL) {
 936         EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new_from_pkey(libctx, pk, propquery);
 937
 938         if (ctx != NULL && ctx->keytype != NULL)
 939             tmp_keymgmt = allocated_keymgmt =
 940                 EVP_KEYMGMT_fetch(ctx->libctx, ctx->keytype, propquery);
 941         EVP_PKEY_CTX_free(ctx);
 942     }
 943
 944     if (tmp_keymgmt != NULL)
 945         keydata =
 946             evp_keymgmt_util_export_to_provider(pk, tmp_keymgmt);
 947
 948     /*
 949      * If nothing was exported, |tmp_keymgmt| might point at a freed
 950      * EVP_KEYMGMT, so we clear it to be safe.  It shouldn't be useful for
 951      * the caller either way in that case.
 952      */
 953     if (keydata == NULL)
 954         tmp_keymgmt = NULL;
 955
 956     if (keymgmt != NULL)
 957         *keymgmt = tmp_keymgmt;
 958
 959     EVP_KEYMGMT_free(allocated_keymgmt);
 960     return keydata;
 961 }