ssl/ssl_cert.c

   1 /*
   2  * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
   3  * Copyright (c) 2002, Oracle and/or its affiliates. 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 <sys/types.h>
  13
  14 #include "internal/nelem.h"
  15 #include "internal/o_dir.h"
  16 #include <openssl/bio.h>
  17 #include <openssl/pem.h>
  18 #include <openssl/store.h>
  19 #include <openssl/x509v3.h>
  20 #include <openssl/dh.h>
  21 #include <openssl/bn.h>
  22 #include <openssl/crypto.h>
  23 #include "internal/refcount.h"
  24 #include "ssl_local.h"
  25 #include "ssl_cert_table.h"
  26 #include "internal/thread_once.h"
  27 #ifndef OPENSSL_NO_POSIX_IO
  28 # include <sys/stat.h>
  29 # ifdef _WIN32
  30 #  define stat _stat
  31 # endif
  32 #endif
  33
  34 #ifndef S_ISDIR
  35 # define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
  36 #endif
  37
  38 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
  39                                          int op, int bits, int nid, void *other,
  40                                          void *ex);
  41
  42 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT;
  43 static volatile int ssl_x509_store_ctx_idx = -1;
  44
  45 DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init)
  46 {
  47     ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0,
  48                                                              "SSL for verify callback",
  49                                                              NULL, NULL, NULL);
  50     return ssl_x509_store_ctx_idx >= 0;
  51 }
  52
  53 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
  54 {
  55
  56     if (!RUN_ONCE(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init))
  57         return -1;
  58     return ssl_x509_store_ctx_idx;
  59 }
  60
  61 CERT *ssl_cert_new(size_t ssl_pkey_num)
  62 {
  63     CERT *ret = NULL;
  64
  65     /* Should never happen */
  66     if (!ossl_assert(ssl_pkey_num >= SSL_PKEY_NUM))
  67         return NULL;
  68
  69     ret = OPENSSL_zalloc(sizeof(*ret));
  70     if (ret == NULL)
  71         return NULL;
  72
  73     ret->ssl_pkey_num = ssl_pkey_num;
  74     ret->pkeys = OPENSSL_zalloc(ret->ssl_pkey_num * sizeof(CERT_PKEY));
  75     if (ret->pkeys == NULL) {
  76         OPENSSL_free(ret);
  77         return NULL;
  78     }
  79
  80     ret->key = &(ret->pkeys[SSL_PKEY_RSA]);
  81     ret->references = 1;
  82     ret->sec_cb = ssl_security_default_callback;
  83     ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
  84     ret->sec_ex = NULL;
  85     ret->lock = CRYPTO_THREAD_lock_new();
  86     if (ret->lock == NULL) {
  87         ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB);
  88         OPENSSL_free(ret->pkeys);
  89         OPENSSL_free(ret);
  90         return NULL;
  91     }
  92
  93     return ret;
  94 }
  95
  96 CERT *ssl_cert_dup(CERT *cert)
  97 {
  98     CERT *ret = OPENSSL_zalloc(sizeof(*ret));
  99     size_t i;
 100 #ifndef OPENSSL_NO_COMP_ALG
 101     int j;
 102 #endif
 103
 104     if (ret == NULL)
 105         return NULL;
 106
 107     ret->ssl_pkey_num = cert->ssl_pkey_num;
 108     ret->pkeys = OPENSSL_zalloc(ret->ssl_pkey_num * sizeof(CERT_PKEY));
 109     if (ret->pkeys == NULL) {
 110         OPENSSL_free(ret);
 111         return NULL;
 112     }
 113
 114     ret->references = 1;
 115     ret->key = &ret->pkeys[cert->key - cert->pkeys];
 116     ret->lock = CRYPTO_THREAD_lock_new();
 117     if (ret->lock == NULL) {
 118         ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB);
 119         OPENSSL_free(ret->pkeys);
 120         OPENSSL_free(ret);
 121         return NULL;
 122     }
 123
 124     if (cert->dh_tmp != NULL) {
 125         ret->dh_tmp = cert->dh_tmp;
 126         EVP_PKEY_up_ref(ret->dh_tmp);
 127     }
 128
 129     ret->dh_tmp_cb = cert->dh_tmp_cb;
 130     ret->dh_tmp_auto = cert->dh_tmp_auto;
 131
 132     for (i = 0; i < ret->ssl_pkey_num; i++) {
 133         CERT_PKEY *cpk = cert->pkeys + i;
 134         CERT_PKEY *rpk = ret->pkeys + i;
 135
 136         if (cpk->x509 != NULL) {
 137             rpk->x509 = cpk->x509;
 138             X509_up_ref(rpk->x509);
 139         }
 140
 141         if (cpk->privatekey != NULL) {
 142             rpk->privatekey = cpk->privatekey;
 143             EVP_PKEY_up_ref(cpk->privatekey);
 144         }
 145
 146         if (cpk->chain) {
 147             rpk->chain = X509_chain_up_ref(cpk->chain);
 148             if (!rpk->chain) {
 149                 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
 150                 goto err;
 151             }
 152         }
 153         if (cpk->serverinfo != NULL) {
 154             /* Just copy everything. */
 155             rpk->serverinfo = OPENSSL_memdup(cpk->serverinfo, cpk->serverinfo_length);
 156             if (rpk->serverinfo == NULL)
 157                 goto err;
 158             rpk->serverinfo_length = cpk->serverinfo_length;
 159         }
 160 #ifndef OPENSSL_NO_COMP_ALG
 161         for (j = TLSEXT_comp_cert_none; j < TLSEXT_comp_cert_limit; j++) {
 162             if (cpk->comp_cert[j] != NULL) {
 163                 if (!OSSL_COMP_CERT_up_ref(cpk->comp_cert[j]))
 164                     goto err;
 165                 rpk->comp_cert[j] = cpk->comp_cert[j];
 166             }
 167         }
 168 #endif
 169     }
 170
 171     /* Configured sigalgs copied across */
 172     if (cert->conf_sigalgs) {
 173         ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen
 174                                            * sizeof(*cert->conf_sigalgs));
 175         if (ret->conf_sigalgs == NULL)
 176             goto err;
 177         memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 178                cert->conf_sigalgslen * sizeof(*cert->conf_sigalgs));
 179         ret->conf_sigalgslen = cert->conf_sigalgslen;
 180     } else
 181         ret->conf_sigalgs = NULL;
 182
 183     if (cert->client_sigalgs) {
 184         ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen
 185                                              * sizeof(*cert->client_sigalgs));
 186         if (ret->client_sigalgs == NULL)
 187             goto err;
 188         memcpy(ret->client_sigalgs, cert->client_sigalgs,
 189                cert->client_sigalgslen * sizeof(*cert->client_sigalgs));
 190         ret->client_sigalgslen = cert->client_sigalgslen;
 191     } else
 192         ret->client_sigalgs = NULL;
 193     /* Copy any custom client certificate types */
 194     if (cert->ctype) {
 195         ret->ctype = OPENSSL_memdup(cert->ctype, cert->ctype_len);
 196         if (ret->ctype == NULL)
 197             goto err;
 198         ret->ctype_len = cert->ctype_len;
 199     }
 200
 201     ret->cert_flags = cert->cert_flags;
 202
 203     ret->cert_cb = cert->cert_cb;
 204     ret->cert_cb_arg = cert->cert_cb_arg;
 205
 206     if (cert->verify_store) {
 207         X509_STORE_up_ref(cert->verify_store);
 208         ret->verify_store = cert->verify_store;
 209     }
 210
 211     if (cert->chain_store) {
 212         X509_STORE_up_ref(cert->chain_store);
 213         ret->chain_store = cert->chain_store;
 214     }
 215
 216     ret->sec_cb = cert->sec_cb;
 217     ret->sec_level = cert->sec_level;
 218     ret->sec_ex = cert->sec_ex;
 219
 220     if (!custom_exts_copy(&ret->custext, &cert->custext))
 221         goto err;
 222 #ifndef OPENSSL_NO_PSK
 223     if (cert->psk_identity_hint) {
 224         ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint);
 225         if (ret->psk_identity_hint == NULL)
 226             goto err;
 227     }
 228 #endif
 229     return ret;
 230
 231  err:
 232     ssl_cert_free(ret);
 233
 234     return NULL;
 235 }
 236
 237 /* Free up and clear all certificates and chains */
 238
 239 void ssl_cert_clear_certs(CERT *c)
 240 {
 241     size_t i;
 242 #ifndef OPENSSL_NO_COMP_ALG
 243     int j;
 244 #endif
 245
 246     if (c == NULL)
 247         return;
 248     for (i = 0; i < c->ssl_pkey_num; i++) {
 249         CERT_PKEY *cpk = c->pkeys + i;
 250         X509_free(cpk->x509);
 251         cpk->x509 = NULL;
 252         EVP_PKEY_free(cpk->privatekey);
 253         cpk->privatekey = NULL;
 254         OSSL_STACK_OF_X509_free(cpk->chain);
 255         cpk->chain = NULL;
 256         OPENSSL_free(cpk->serverinfo);
 257         cpk->serverinfo = NULL;
 258         cpk->serverinfo_length = 0;
 259 #ifndef OPENSSL_NO_COMP_ALG
 260         for (j = 0; j < TLSEXT_comp_cert_limit; j++) {
 261             OSSL_COMP_CERT_free(cpk->comp_cert[j]);
 262             cpk->comp_cert[j] = NULL;
 263             cpk->cert_comp_used = 0;
 264         }
 265 #endif
 266     }
 267 }
 268
 269 void ssl_cert_free(CERT *c)
 270 {
 271     int i;
 272
 273     if (c == NULL)
 274         return;
 275     CRYPTO_DOWN_REF(&c->references, &i, c->lock);
 276     REF_PRINT_COUNT("CERT", c);
 277     if (i > 0)
 278         return;
 279     REF_ASSERT_ISNT(i < 0);
 280
 281     EVP_PKEY_free(c->dh_tmp);
 282
 283     ssl_cert_clear_certs(c);
 284     OPENSSL_free(c->conf_sigalgs);
 285     OPENSSL_free(c->client_sigalgs);
 286     OPENSSL_free(c->ctype);
 287     X509_STORE_free(c->verify_store);
 288     X509_STORE_free(c->chain_store);
 289     custom_exts_free(&c->custext);
 290 #ifndef OPENSSL_NO_PSK
 291     OPENSSL_free(c->psk_identity_hint);
 292 #endif
 293     OPENSSL_free(c->pkeys);
 294     CRYPTO_THREAD_lock_free(c->lock);
 295     OPENSSL_free(c);
 296 }
 297
 298 int ssl_cert_set0_chain(SSL_CONNECTION *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
 299 {
 300     int i, r;
 301     CERT_PKEY *cpk = s != NULL ? s->cert->key : ctx->cert->key;
 302
 303     if (!cpk)
 304         return 0;
 305     for (i = 0; i < sk_X509_num(chain); i++) {
 306         X509 *x = sk_X509_value(chain, i);
 307
 308         r = ssl_security_cert(s, ctx, x, 0, 0);
 309         if (r != 1) {
 310             ERR_raise(ERR_LIB_SSL, r);
 311             return 0;
 312         }
 313     }
 314     OSSL_STACK_OF_X509_free(cpk->chain);
 315     cpk->chain = chain;
 316     return 1;
 317 }
 318
 319 int ssl_cert_set1_chain(SSL_CONNECTION *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
 320 {
 321     STACK_OF(X509) *dchain;
 322
 323     if (!chain)
 324         return ssl_cert_set0_chain(s, ctx, NULL);
 325     dchain = X509_chain_up_ref(chain);
 326     if (!dchain)
 327         return 0;
 328     if (!ssl_cert_set0_chain(s, ctx, dchain)) {
 329         OSSL_STACK_OF_X509_free(dchain);
 330         return 0;
 331     }
 332     return 1;
 333 }
 334
 335 int ssl_cert_add0_chain_cert(SSL_CONNECTION *s, SSL_CTX *ctx, X509 *x)
 336 {
 337     int r;
 338     CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
 339
 340     if (!cpk)
 341         return 0;
 342     r = ssl_security_cert(s, ctx, x, 0, 0);
 343     if (r != 1) {
 344         ERR_raise(ERR_LIB_SSL, r);
 345         return 0;
 346     }
 347     if (!cpk->chain)
 348         cpk->chain = sk_X509_new_null();
 349     if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 350         return 0;
 351     return 1;
 352 }
 353
 354 int ssl_cert_add1_chain_cert(SSL_CONNECTION *s, SSL_CTX *ctx, X509 *x)
 355 {
 356     if (!ssl_cert_add0_chain_cert(s, ctx, x))
 357         return 0;
 358     X509_up_ref(x);
 359     return 1;
 360 }
 361
 362 int ssl_cert_select_current(CERT *c, X509 *x)
 363 {
 364     size_t i;
 365
 366     if (x == NULL)
 367         return 0;
 368     for (i = 0; i < c->ssl_pkey_num; i++) {
 369         CERT_PKEY *cpk = c->pkeys + i;
 370         if (cpk->x509 == x && cpk->privatekey) {
 371             c->key = cpk;
 372             return 1;
 373         }
 374     }
 375
 376     for (i = 0; i < c->ssl_pkey_num; i++) {
 377         CERT_PKEY *cpk = c->pkeys + i;
 378         if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
 379             c->key = cpk;
 380             return 1;
 381         }
 382     }
 383     return 0;
 384 }
 385
 386 int ssl_cert_set_current(CERT *c, long op)
 387 {
 388     size_t i, idx;
 389
 390     if (!c)
 391         return 0;
 392     if (op == SSL_CERT_SET_FIRST)
 393         idx = 0;
 394     else if (op == SSL_CERT_SET_NEXT) {
 395         idx = (size_t)(c->key - c->pkeys + 1);
 396         if (idx >= c->ssl_pkey_num)
 397             return 0;
 398     } else
 399         return 0;
 400     for (i = idx; i < c->ssl_pkey_num; i++) {
 401         CERT_PKEY *cpk = c->pkeys + i;
 402         if (cpk->x509 && cpk->privatekey) {
 403             c->key = cpk;
 404             return 1;
 405         }
 406     }
 407     return 0;
 408 }
 409
 410 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
 411 {
 412     c->cert_cb = cb;
 413     c->cert_cb_arg = arg;
 414 }
 415
 416 /*
 417  * Verify a certificate chain/raw public key
 418  * Return codes:
 419  *  1: Verify success
 420  *  0: Verify failure or error
 421  * -1: Retry required
 422  */
 423 static int ssl_verify_internal(SSL_CONNECTION *s, STACK_OF(X509) *sk, EVP_PKEY *rpk)
 424 {
 425     X509 *x;
 426     int i = 0;
 427     X509_STORE *verify_store;
 428     X509_STORE_CTX *ctx = NULL;
 429     X509_VERIFY_PARAM *param;
 430     SSL_CTX *sctx;
 431
 432     /* Something must be passed in */
 433     if ((sk == NULL || sk_X509_num(sk) == 0) && rpk == NULL)
 434         return 0;
 435
 436     /* Only one can be set */
 437     if (sk != NULL && rpk != NULL)
 438         return 0;
 439
 440     sctx = SSL_CONNECTION_GET_CTX(s);
 441     if (s->cert->verify_store)
 442         verify_store = s->cert->verify_store;
 443     else
 444         verify_store = sctx->cert_store;
 445
 446     ctx = X509_STORE_CTX_new_ex(sctx->libctx, sctx->propq);
 447     if (ctx == NULL) {
 448         ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
 449         return 0;
 450     }
 451
 452     if (sk != NULL) {
 453         x = sk_X509_value(sk, 0);
 454         if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) {
 455             ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
 456             goto end;
 457         }
 458     } else {
 459         if (!X509_STORE_CTX_init_rpk(ctx, verify_store, rpk)) {
 460             ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
 461             goto end;
 462         }
 463     }
 464     param = X509_STORE_CTX_get0_param(ctx);
 465     /*
 466      * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some
 467      * point, for now a single @SECLEVEL sets the same policy for TLS crypto
 468      * and PKI authentication.
 469      */
 470     X509_VERIFY_PARAM_set_auth_level(param,
 471         SSL_get_security_level(SSL_CONNECTION_GET_SSL(s)));
 472
 473     /* Set suite B flags if needed */
 474     X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s));
 475     if (!X509_STORE_CTX_set_ex_data(ctx,
 476             SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
 477         goto end;
 478     }
 479
 480     /* Verify via DANE if enabled */
 481     if (DANETLS_ENABLED(&s->dane))
 482         X509_STORE_CTX_set0_dane(ctx, &s->dane);
 483
 484     /*
 485      * We need to inherit the verify parameters. These can be determined by
 486      * the context: if its a server it will verify SSL client certificates or
 487      * vice versa.
 488      */
 489
 490     X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
 491     /*
 492      * Anything non-default in "s->param" should overwrite anything in the ctx.
 493      */
 494     X509_VERIFY_PARAM_set1(param, s->param);
 495
 496     if (s->verify_callback)
 497         X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
 498
 499     if (sctx->app_verify_callback != NULL) {
 500         i = sctx->app_verify_callback(ctx, sctx->app_verify_arg);
 501     } else {
 502         i = X509_verify_cert(ctx);
 503         /* We treat an error in the same way as a failure to verify */
 504         if (i < 0)
 505             i = 0;
 506     }
 507
 508     s->verify_result = X509_STORE_CTX_get_error(ctx);
 509     OSSL_STACK_OF_X509_free(s->verified_chain);
 510     s->verified_chain = NULL;
 511
 512     if (sk != NULL && X509_STORE_CTX_get0_chain(ctx) != NULL) {
 513         s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
 514         if (s->verified_chain == NULL) {
 515             ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
 516             i = 0;
 517         }
 518     }
 519
 520     /* Move peername from the store context params to the SSL handle's */
 521     X509_VERIFY_PARAM_move_peername(s->param, param);
 522
 523  end:
 524     X509_STORE_CTX_free(ctx);
 525     return i;
 526 }
 527
 528 /*
 529  * Verify a raw public key
 530  * Return codes:
 531  *  1: Verify success
 532  *  0: Verify failure or error
 533  * -1: Retry required
 534  */
 535 int ssl_verify_rpk(SSL_CONNECTION *s, EVP_PKEY *rpk)
 536 {
 537     return ssl_verify_internal(s, NULL, rpk);
 538 }
 539
 540 /*
 541  * Verify a certificate chain
 542  * Return codes:
 543  *  1: Verify success
 544  *  0: Verify failure or error
 545  * -1: Retry required
 546  */
 547 int ssl_verify_cert_chain(SSL_CONNECTION *s, STACK_OF(X509) *sk)
 548 {
 549     return ssl_verify_internal(s, sk, NULL);
 550 }
 551
 552 static void set0_CA_list(STACK_OF(X509_NAME) **ca_list,
 553                         STACK_OF(X509_NAME) *name_list)
 554 {
 555     sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
 556     *ca_list = name_list;
 557 }
 558
 559 STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk)
 560 {
 561     int i;
 562     const int num = sk_X509_NAME_num(sk);
 563     STACK_OF(X509_NAME) *ret;
 564     X509_NAME *name;
 565
 566     ret = sk_X509_NAME_new_reserve(NULL, num);
 567     if (ret == NULL) {
 568         ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB);
 569         return NULL;
 570     }
 571     for (i = 0; i < num; i++) {
 572         name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
 573         if (name == NULL) {
 574             ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
 575             sk_X509_NAME_pop_free(ret, X509_NAME_free);
 576             return NULL;
 577         }
 578         sk_X509_NAME_push(ret, name);   /* Cannot fail after reserve call */
 579     }
 580     return ret;
 581 }
 582
 583 void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
 584 {
 585     SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
 586
 587     if (sc == NULL)
 588         return;
 589
 590     set0_CA_list(&sc->ca_names, name_list);
 591 }
 592
 593 void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
 594 {
 595     set0_CA_list(&ctx->ca_names, name_list);
 596 }
 597
 598 const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx)
 599 {
 600     return ctx->ca_names;
 601 }
 602
 603 const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s)
 604 {
 605     const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
 606
 607     if (sc == NULL)
 608         return NULL;
 609
 610     return sc->ca_names != NULL ? sc->ca_names : s->ctx->ca_names;
 611 }
 612
 613 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
 614 {
 615     set0_CA_list(&ctx->client_ca_names, name_list);
 616 }
 617
 618 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 619 {
 620     return ctx->client_ca_names;
 621 }
 622
 623 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
 624 {
 625     SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
 626
 627     if (sc == NULL)
 628         return;
 629
 630     set0_CA_list(&sc->client_ca_names, name_list);
 631 }
 632
 633 const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s)
 634 {
 635     const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
 636
 637     if (sc == NULL)
 638         return NULL;
 639
 640     return sc->s3.tmp.peer_ca_names;
 641 }
 642
 643 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 644 {
 645     const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
 646
 647     if (sc == NULL)
 648         return NULL;
 649
 650     if (!sc->server)
 651         return sc->s3.tmp.peer_ca_names;
 652     return sc->client_ca_names != NULL ? sc->client_ca_names
 653                                        : s->ctx->client_ca_names;
 654 }
 655
 656 static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x)
 657 {
 658     X509_NAME *name;
 659
 660     if (x == NULL)
 661         return 0;
 662     if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL))
 663         return 0;
 664
 665     if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 666         return 0;
 667
 668     if (!sk_X509_NAME_push(*sk, name)) {
 669         X509_NAME_free(name);
 670         return 0;
 671     }
 672     return 1;
 673 }
 674
 675 int SSL_add1_to_CA_list(SSL *ssl, const X509 *x)
 676 {
 677     SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
 678
 679     if (sc == NULL)
 680         return 0;
 681
 682     return add_ca_name(&sc->ca_names, x);
 683 }
 684
 685 int SSL_CTX_add1_to_CA_list(SSL_CTX *ctx, const X509 *x)
 686 {
 687     return add_ca_name(&ctx->ca_names, x);
 688 }
 689
 690 /*
 691  * The following two are older names are to be replaced with
 692  * SSL(_CTX)_add1_to_CA_list
 693  */
 694 int SSL_add_client_CA(SSL *ssl, X509 *x)
 695 {
 696     SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
 697
 698     if (sc == NULL)
 699         return 0;
 700
 701     return add_ca_name(&sc->client_ca_names, x);
 702 }
 703
 704 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
 705 {
 706     return add_ca_name(&ctx->client_ca_names, x);
 707 }
 708
 709 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
 710 {
 711     unsigned char *abuf = NULL, *bbuf = NULL;
 712     int alen, blen, ret;
 713
 714     /* X509_NAME_cmp() itself casts away constness in this way, so
 715      * assume it's safe:
 716      */
 717     alen = i2d_X509_NAME((X509_NAME *)a, &abuf);
 718     blen = i2d_X509_NAME((X509_NAME *)b, &bbuf);
 719
 720     if (alen < 0 || blen < 0)
 721         ret = -2;
 722     else if (alen != blen)
 723         ret = alen - blen;
 724     else /* alen == blen */
 725         ret = memcmp(abuf, bbuf, alen);
 726
 727     OPENSSL_free(abuf);
 728     OPENSSL_free(bbuf);
 729
 730     return ret;
 731 }
 732
 733 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
 734 {
 735     return xname_cmp(*a, *b);
 736 }
 737
 738 static unsigned long xname_hash(const X509_NAME *a)
 739 {
 740     /* This returns 0 also if SHA1 is not available */
 741     return X509_NAME_hash_ex((X509_NAME *)a, NULL, NULL, NULL);
 742 }
 743
 744 STACK_OF(X509_NAME) *SSL_load_client_CA_file_ex(const char *file,
 745                                                 OSSL_LIB_CTX *libctx,
 746                                                 const char *propq)
 747 {
 748     BIO *in = BIO_new(BIO_s_file());
 749     X509 *x = NULL;
 750     X509_NAME *xn = NULL;
 751     STACK_OF(X509_NAME) *ret = NULL;
 752     LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp);
 753     OSSL_LIB_CTX *prev_libctx = NULL;
 754
 755     if (name_hash == NULL) {
 756         ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB);
 757         goto err;
 758     }
 759     if (in == NULL) {
 760         ERR_raise(ERR_LIB_SSL, ERR_R_BIO_LIB);
 761         goto err;
 762     }
 763
 764     x = X509_new_ex(libctx, propq);
 765     if (x == NULL) {
 766         ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
 767         goto err;
 768     }
 769     if (BIO_read_filename(in, file) <= 0)
 770         goto err;
 771
 772     /* Internally lh_X509_NAME_retrieve() needs the libctx to retrieve SHA1 */
 773     prev_libctx = OSSL_LIB_CTX_set0_default(libctx);
 774     for (;;) {
 775         if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
 776             break;
 777         if (ret == NULL) {
 778             ret = sk_X509_NAME_new_null();
 779             if (ret == NULL) {
 780                 ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB);
 781                 goto err;
 782             }
 783         }
 784         if ((xn = X509_get_subject_name(x)) == NULL)
 785             goto err;
 786         /* check for duplicates */
 787         xn = X509_NAME_dup(xn);
 788         if (xn == NULL)
 789             goto err;
 790         if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) {
 791             /* Duplicate. */
 792             X509_NAME_free(xn);
 793             xn = NULL;
 794         } else {
 795             lh_X509_NAME_insert(name_hash, xn);
 796             if (!sk_X509_NAME_push(ret, xn))
 797                 goto err;
 798         }
 799     }
 800     goto done;
 801
 802  err:
 803     X509_NAME_free(xn);
 804     sk_X509_NAME_pop_free(ret, X509_NAME_free);
 805     ret = NULL;
 806  done:
 807     /* restore the old libctx */
 808     OSSL_LIB_CTX_set0_default(prev_libctx);
 809     BIO_free(in);
 810     X509_free(x);
 811     lh_X509_NAME_free(name_hash);
 812     if (ret != NULL)
 813         ERR_clear_error();
 814     return ret;
 815 }
 816
 817 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 818 {
 819     return SSL_load_client_CA_file_ex(file, NULL, NULL);
 820 }
 821
 822 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 823                                         const char *file)
 824 {
 825     BIO *in;
 826     X509 *x = NULL;
 827     X509_NAME *xn = NULL;
 828     int ret = 1;
 829     int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
 830
 831     oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
 832
 833     in = BIO_new(BIO_s_file());
 834
 835     if (in == NULL) {
 836         ERR_raise(ERR_LIB_SSL, ERR_R_BIO_LIB);
 837         goto err;
 838     }
 839
 840     if (BIO_read_filename(in, file) <= 0)
 841         goto err;
 842
 843     for (;;) {
 844         if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
 845             break;
 846         if ((xn = X509_get_subject_name(x)) == NULL)
 847             goto err;
 848         xn = X509_NAME_dup(xn);
 849         if (xn == NULL)
 850             goto err;
 851         if (sk_X509_NAME_find(stack, xn) >= 0) {
 852             /* Duplicate. */
 853             X509_NAME_free(xn);
 854         } else if (!sk_X509_NAME_push(stack, xn)) {
 855             X509_NAME_free(xn);
 856             goto err;
 857         }
 858     }
 859
 860     ERR_clear_error();
 861     goto done;
 862
 863  err:
 864     ret = 0;
 865  done:
 866     BIO_free(in);
 867     X509_free(x);
 868     (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
 869     return ret;
 870 }
 871
 872 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 873                                        const char *dir)
 874 {
 875     OPENSSL_DIR_CTX *d = NULL;
 876     const char *filename;
 877     int ret = 0;
 878
 879     /* Note that a side effect is that the CAs will be sorted by name */
 880
 881     while ((filename = OPENSSL_DIR_read(&d, dir))) {
 882         char buf[1024];
 883         int r;
 884         struct stat st;
 885
 886         if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) {
 887             ERR_raise(ERR_LIB_SSL, SSL_R_PATH_TOO_LONG);
 888             goto err;
 889         }
 890 #ifdef OPENSSL_SYS_VMS
 891         r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename);
 892 #else
 893         r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename);
 894 #endif
 895         /* Skip subdirectories */
 896         if (!stat(buf, &st) && S_ISDIR(st.st_mode))
 897             continue;
 898         if (r <= 0 || r >= (int)sizeof(buf))
 899             goto err;
 900         if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
 901             goto err;
 902     }
 903
 904     if (errno) {
 905         ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
 906                        "calling OPENSSL_dir_read(%s)", dir);
 907         ERR_raise(ERR_LIB_SSL, ERR_R_SYS_LIB);
 908         goto err;
 909     }
 910
 911     ret = 1;
 912
 913  err:
 914     if (d)
 915         OPENSSL_DIR_end(&d);
 916
 917     return ret;
 918 }
 919
 920 static int add_uris_recursive(STACK_OF(X509_NAME) *stack,
 921                               const char *uri, int depth)
 922 {
 923     int ok = 1;
 924     OSSL_STORE_CTX *ctx = NULL;
 925     X509 *x = NULL;
 926     X509_NAME *xn = NULL;
 927
 928     if ((ctx = OSSL_STORE_open(uri, NULL, NULL, NULL, NULL)) == NULL)
 929         goto err;
 930
 931     while (!OSSL_STORE_eof(ctx) && !OSSL_STORE_error(ctx)) {
 932         OSSL_STORE_INFO *info = OSSL_STORE_load(ctx);
 933         int infotype = info == 0 ? 0 : OSSL_STORE_INFO_get_type(info);
 934
 935         if (info == NULL)
 936             continue;
 937
 938         if (infotype == OSSL_STORE_INFO_NAME) {
 939             /*
 940              * This is an entry in the "directory" represented by the current
 941              * uri.  if |depth| allows, dive into it.
 942              */
 943             if (depth > 0)
 944                 ok = add_uris_recursive(stack, OSSL_STORE_INFO_get0_NAME(info),
 945                                         depth - 1);
 946         } else if (infotype == OSSL_STORE_INFO_CERT) {
 947             if ((x = OSSL_STORE_INFO_get0_CERT(info)) == NULL
 948                 || (xn = X509_get_subject_name(x)) == NULL
 949                 || (xn = X509_NAME_dup(xn)) == NULL)
 950                 goto err;
 951             if (sk_X509_NAME_find(stack, xn) >= 0) {
 952                 /* Duplicate. */
 953                 X509_NAME_free(xn);
 954             } else if (!sk_X509_NAME_push(stack, xn)) {
 955                 X509_NAME_free(xn);
 956                 goto err;
 957             }
 958         }
 959
 960         OSSL_STORE_INFO_free(info);
 961     }
 962
 963     ERR_clear_error();
 964     goto done;
 965
 966  err:
 967     ok = 0;
 968  done:
 969     OSSL_STORE_close(ctx);
 970
 971     return ok;
 972 }
 973
 974 int SSL_add_store_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 975                                          const char *store)
 976 {
 977     int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b)
 978         = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
 979     int ret = add_uris_recursive(stack, store, 1);
 980
 981     (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
 982     return ret;
 983 }
 984
 985 /* Build a certificate chain for current certificate */
 986 int ssl_build_cert_chain(SSL_CONNECTION *s, SSL_CTX *ctx, int flags)
 987 {
 988     CERT *c = s != NULL ? s->cert : ctx->cert;
 989     CERT_PKEY *cpk = c->key;
 990     X509_STORE *chain_store = NULL;
 991     X509_STORE_CTX *xs_ctx = NULL;
 992     STACK_OF(X509) *chain = NULL, *untrusted = NULL;
 993     X509 *x;
 994     SSL_CTX *real_ctx = (s == NULL) ? ctx : SSL_CONNECTION_GET_CTX(s);
 995     int i, rv = 0;
 996
 997     if (cpk->x509 == NULL) {
 998         ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_SET);
 999         goto err;
1000     }
1001     /* Rearranging and check the chain: add everything to a store */
1002     if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
1003         chain_store = X509_STORE_new();
1004         if (chain_store == NULL)
1005             goto err;
1006         for (i = 0; i < sk_X509_num(cpk->chain); i++) {
1007             x = sk_X509_value(cpk->chain, i);
1008             if (!X509_STORE_add_cert(chain_store, x))
1009                 goto err;
1010         }
1011         /* Add EE cert too: it might be self signed */
1012         if (!X509_STORE_add_cert(chain_store, cpk->x509))
1013             goto err;
1014     } else {
1015         if (c->chain_store != NULL)
1016             chain_store = c->chain_store;
1017         else
1018             chain_store = real_ctx->cert_store;
1019
1020         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1021             untrusted = cpk->chain;
1022     }
1023
1024     xs_ctx = X509_STORE_CTX_new_ex(real_ctx->libctx, real_ctx->propq);
1025     if (xs_ctx == NULL) {
1026         ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
1027         goto err;
1028     }
1029     if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
1030         ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
1031         goto err;
1032     }
1033     /* Set suite B flags if needed */
1034     X509_STORE_CTX_set_flags(xs_ctx,
1035                              c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1036
1037     i = X509_verify_cert(xs_ctx);
1038     if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
1039         if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1040             ERR_clear_error();
1041         i = 1;
1042         rv = 2;
1043     }
1044     if (i > 0)
1045         chain = X509_STORE_CTX_get1_chain(xs_ctx);
1046     if (i <= 0) {
1047         i = X509_STORE_CTX_get_error(xs_ctx);
1048         ERR_raise_data(ERR_LIB_SSL, SSL_R_CERTIFICATE_VERIFY_FAILED,
1049                        "Verify error:%s", X509_verify_cert_error_string(i));
1050
1051         goto err;
1052     }
1053     /* Remove EE certificate from chain */
1054     x = sk_X509_shift(chain);
1055     X509_free(x);
1056     if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
1057         if (sk_X509_num(chain) > 0) {
1058             /* See if last cert is self signed */
1059             x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1060             if (X509_get_extension_flags(x) & EXFLAG_SS) {
1061                 x = sk_X509_pop(chain);
1062                 X509_free(x);
1063             }
1064         }
1065     }
1066     /*
1067      * Check security level of all CA certificates: EE will have been checked
1068      * already.
1069      */
1070     for (i = 0; i < sk_X509_num(chain); i++) {
1071         x = sk_X509_value(chain, i);
1072         rv = ssl_security_cert(s, ctx, x, 0, 0);
1073         if (rv != 1) {
1074             ERR_raise(ERR_LIB_SSL, rv);
1075             OSSL_STACK_OF_X509_free(chain);
1076             rv = 0;
1077             goto err;
1078         }
1079     }
1080     OSSL_STACK_OF_X509_free(cpk->chain);
1081     cpk->chain = chain;
1082     if (rv == 0)
1083         rv = 1;
1084  err:
1085     if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1086         X509_STORE_free(chain_store);
1087     X509_STORE_CTX_free(xs_ctx);
1088
1089     return rv;
1090 }
1091
1092 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1093 {
1094     X509_STORE **pstore;
1095     if (chain)
1096         pstore = &c->chain_store;
1097     else
1098         pstore = &c->verify_store;
1099     X509_STORE_free(*pstore);
1100     *pstore = store;
1101     if (ref && store)
1102         X509_STORE_up_ref(store);
1103     return 1;
1104 }
1105
1106 int ssl_cert_get_cert_store(CERT *c, X509_STORE **pstore, int chain)
1107 {
1108     *pstore = (chain ? c->chain_store : c->verify_store);
1109     return 1;
1110 }
1111
1112 int ssl_get_security_level_bits(const SSL *s, const SSL_CTX *ctx, int *levelp)
1113 {
1114     int level;
1115     /*
1116      * note that there's a corresponding minbits_table
1117      * in crypto/x509/x509_vfy.c that's used for checking the security level
1118      * of RSA and DSA keys
1119      */
1120     static const int minbits_table[5 + 1] = { 0, 80, 112, 128, 192, 256 };
1121
1122     if (ctx != NULL)
1123         level = SSL_CTX_get_security_level(ctx);
1124     else
1125         level = SSL_get_security_level(s);
1126
1127     if (level > 5)
1128         level = 5;
1129     else if (level < 0)
1130         level = 0;
1131
1132     if (levelp != NULL)
1133         *levelp = level;
1134
1135     return minbits_table[level];
1136 }
1137
1138 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
1139                                          int op, int bits, int nid, void *other,
1140                                          void *ex)
1141 {
1142     int level, minbits, pfs_mask;
1143     const SSL_CONNECTION *sc;
1144
1145     minbits = ssl_get_security_level_bits(s, ctx, &level);
1146
1147     if (level == 0) {
1148         /*
1149          * No EDH keys weaker than 1024-bits even at level 0, otherwise,
1150          * anything goes.
1151          */
1152         if (op == SSL_SECOP_TMP_DH && bits < 80)
1153             return 0;
1154         return 1;
1155     }
1156     switch (op) {
1157     case SSL_SECOP_CIPHER_SUPPORTED:
1158     case SSL_SECOP_CIPHER_SHARED:
1159     case SSL_SECOP_CIPHER_CHECK:
1160         {
1161             const SSL_CIPHER *c = other;
1162             /* No ciphers below security level */
1163             if (bits < minbits)
1164                 return 0;
1165             /* No unauthenticated ciphersuites */
1166             if (c->algorithm_auth & SSL_aNULL)
1167                 return 0;
1168             /* No MD5 mac ciphersuites */
1169             if (c->algorithm_mac & SSL_MD5)
1170                 return 0;
1171             /* SHA1 HMAC is 160 bits of security */
1172             if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1173                 return 0;
1174             /* Level 3: forward secure ciphersuites only */
1175             pfs_mask = SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK;
1176             if (level >= 3 && c->min_tls != TLS1_3_VERSION &&
1177                                !(c->algorithm_mkey & pfs_mask))
1178                 return 0;
1179             break;
1180         }
1181     case SSL_SECOP_VERSION:
1182         if ((sc = SSL_CONNECTION_FROM_CONST_SSL(s)) == NULL)
1183             return 0;
1184         if (!SSL_CONNECTION_IS_DTLS(sc)) {
1185             /* SSLv3, TLS v1.0 and TLS v1.1 only allowed at level 0 */
1186             if (nid <= TLS1_1_VERSION && level > 0)
1187                 return 0;
1188         } else {
1189             /* DTLS v1.0 only allowed at level 0 */
1190             if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level > 0)
1191                 return 0;
1192         }
1193         break;
1194
1195     case SSL_SECOP_COMPRESSION:
1196         if (level >= 2)
1197             return 0;
1198         break;
1199     case SSL_SECOP_TICKET:
1200         if (level >= 3)
1201             return 0;
1202         break;
1203     default:
1204         if (bits < minbits)
1205             return 0;
1206     }
1207     return 1;
1208 }
1209
1210 int ssl_security(const SSL_CONNECTION *s, int op, int bits, int nid, void *other)
1211 {
1212     return s->cert->sec_cb(SSL_CONNECTION_GET_SSL(s), NULL, op, bits, nid,
1213                            other, s->cert->sec_ex);
1214 }
1215
1216 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
1217 {
1218     return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,
1219                              ctx->cert->sec_ex);
1220 }
1221
1222 int ssl_cert_lookup_by_nid(int nid, size_t *pidx, SSL_CTX *ctx)
1223 {
1224     size_t i;
1225
1226     for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) {
1227         if (ssl_cert_info[i].nid == nid) {
1228             *pidx = i;
1229             return 1;
1230         }
1231     }
1232     for (i = 0; i < ctx->sigalg_list_len; i++) {
1233         if (ctx->ssl_cert_info[i].nid == nid) {
1234             *pidx = SSL_PKEY_NUM + i;
1235             return 1;
1236         }
1237     }
1238     return 0;
1239 }
1240
1241 SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx, SSL_CTX *ctx)
1242 {
1243     size_t i;
1244
1245     /* check classic pk types */
1246     for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) {
1247         SSL_CERT_LOOKUP *tmp_lu = &ssl_cert_info[i];
1248
1249         if (EVP_PKEY_is_a(pk, OBJ_nid2sn(tmp_lu->nid))
1250             || EVP_PKEY_is_a(pk, OBJ_nid2ln(tmp_lu->nid))) {
1251             if (pidx != NULL)
1252                 *pidx = i;
1253             return tmp_lu;
1254         }
1255     }
1256     /* check provider-loaded pk types */
1257     for (i = 0; ctx->sigalg_list_len; i++) {
1258         SSL_CERT_LOOKUP *tmp_lu = &(ctx->ssl_cert_info[i]);
1259
1260         if (EVP_PKEY_is_a(pk, OBJ_nid2sn(tmp_lu->nid))
1261             || EVP_PKEY_is_a(pk, OBJ_nid2ln(tmp_lu->nid))) {
1262             if (pidx != NULL)
1263                 *pidx = SSL_PKEY_NUM + i;
1264             return &ctx->ssl_cert_info[i];
1265         }
1266     }
1267
1268     return NULL;
1269 }
1270
1271 SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx, SSL_CTX *ctx)
1272 {
1273     if (idx >= (OSSL_NELEM(ssl_cert_info) + ctx->sigalg_list_len))
1274         return NULL;
1275     else if (idx >= (OSSL_NELEM(ssl_cert_info)))
1276         return &(ctx->ssl_cert_info[idx - SSL_PKEY_NUM]);
1277     return &ssl_cert_info[idx];
1278 }