crypto/store/store_lib.c

   1 /*
   2  * Copyright 2016-2020 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 "e_os.h"
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <assert.h>
  14
  15 #include "e_os.h"
  16
  17 #include <openssl/crypto.h>
  18 #include <openssl/err.h>
  19 #include <openssl/trace.h>
  20 #include <openssl/store.h>
  21 #include "internal/thread_once.h"
  22 #include "crypto/store.h"
  23 #include "store_local.h"
  24
  25 struct ossl_store_ctx_st {
  26     const OSSL_STORE_LOADER *loader;
  27     OSSL_STORE_LOADER_CTX *loader_ctx;
  28     const UI_METHOD *ui_method;
  29     void *ui_data;
  30     OSSL_STORE_post_process_info_fn post_process;
  31     void *post_process_data;
  32     int expected_type;
  33
  34     /* 0 before the first STORE_load(), 1 otherwise */
  35     int loading;
  36 };
  37
  38 OSSL_STORE_CTX *OSSL_STORE_open(const char *uri, const UI_METHOD *ui_method,
  39                                 void *ui_data,
  40                                 OSSL_STORE_post_process_info_fn post_process,
  41                                 void *post_process_data)
  42 {
  43     const OSSL_STORE_LOADER *loader = NULL;
  44     OSSL_STORE_LOADER_CTX *loader_ctx = NULL;
  45     OSSL_STORE_CTX *ctx = NULL;
  46     char scheme_copy[256], *p, *schemes[2];
  47     size_t schemes_n = 0;
  48     size_t i;
  49
  50     /*
  51      * Put the file scheme first.  If the uri does represent an existing file,
  52      * possible device name and all, then it should be loaded.  Only a failed
  53      * attempt at loading a local file should have us try something else.
  54      */
  55     schemes[schemes_n++] = "file";
  56
  57     /*
  58      * Now, check if we have something that looks like a scheme, and add it
  59      * as a second scheme.  However, also check if there's an authority start
  60      * (://), because that will invalidate the previous file scheme.  Also,
  61      * check that this isn't actually the file scheme, as there's no point
  62      * going through that one twice!
  63      */
  64     OPENSSL_strlcpy(scheme_copy, uri, sizeof(scheme_copy));
  65     if ((p = strchr(scheme_copy, ':')) != NULL) {
  66         *p++ = '\0';
  67         if (strcasecmp(scheme_copy, "file") != 0) {
  68             if (strncmp(p, "//", 2) == 0)
  69                 schemes_n--;         /* Invalidate the file scheme */
  70             schemes[schemes_n++] = scheme_copy;
  71         }
  72     }
  73
  74     ERR_set_mark();
  75
  76     /* Try each scheme until we find one that could open the URI */
  77     for (i = 0; loader_ctx == NULL && i < schemes_n; i++) {
  78         OSSL_TRACE1(STORE, "Looking up scheme %s\n", schemes[i]);
  79         if ((loader = ossl_store_get0_loader_int(schemes[i])) != NULL) {
  80             OSSL_TRACE1(STORE, "Found loader for scheme %s\n", schemes[i]);
  81             loader_ctx = loader->open(loader, uri, ui_method, ui_data);
  82             OSSL_TRACE2(STORE, "Opened %s => %p\n", uri, (void *)loader_ctx);
  83         }
  84     }
  85
  86     if (loader_ctx == NULL)
  87         goto err;
  88
  89     if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL) {
  90         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_OPEN, ERR_R_MALLOC_FAILURE);
  91         goto err;
  92     }
  93
  94     ctx->loader = loader;
  95     ctx->loader_ctx = loader_ctx;
  96     ctx->ui_method = ui_method;
  97     ctx->ui_data = ui_data;
  98     ctx->post_process = post_process;
  99     ctx->post_process_data = post_process_data;
 100
 101     /*
 102      * If the attempt to open with the 'file' scheme loader failed and the
 103      * other scheme loader succeeded, the failure to open with the 'file'
 104      * scheme loader leaves an error on the error stack.  Let's remove it.
 105      */
 106     ERR_pop_to_mark();
 107
 108     return ctx;
 109
 110  err:
 111     ERR_clear_last_mark();
 112     if (loader_ctx != NULL) {
 113         /*
 114          * We ignore a returned error because we will return NULL anyway in
 115          * this case, so if something goes wrong when closing, that'll simply
 116          * just add another entry on the error stack.
 117          */
 118         (void)loader->close(loader_ctx);
 119     }
 120     return NULL;
 121 }
 122
 123 int OSSL_STORE_ctrl(OSSL_STORE_CTX *ctx, int cmd, ...)
 124 {
 125     va_list args;
 126     int ret;
 127
 128     va_start(args, cmd);
 129     ret = OSSL_STORE_vctrl(ctx, cmd, args);
 130     va_end(args);
 131
 132     return ret;
 133 }
 134
 135 int OSSL_STORE_vctrl(OSSL_STORE_CTX *ctx, int cmd, va_list args)
 136 {
 137     if (ctx->loader->ctrl != NULL)
 138         return ctx->loader->ctrl(ctx->loader_ctx, cmd, args);
 139     return 0;
 140 }
 141
 142 int OSSL_STORE_expect(OSSL_STORE_CTX *ctx, int expected_type)
 143 {
 144     if (ctx->loading) {
 145         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_EXPECT,
 146                       OSSL_STORE_R_LOADING_STARTED);
 147         return 0;
 148     }
 149
 150     ctx->expected_type = expected_type;
 151     if (ctx->loader->expect != NULL)
 152         return ctx->loader->expect(ctx->loader_ctx, expected_type);
 153     return 1;
 154 }
 155
 156 int OSSL_STORE_find(OSSL_STORE_CTX *ctx, const OSSL_STORE_SEARCH *search)
 157 {
 158     if (ctx->loading) {
 159         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_FIND,
 160                       OSSL_STORE_R_LOADING_STARTED);
 161         return 0;
 162     }
 163     if (ctx->loader->find == NULL) {
 164         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_FIND,
 165                       OSSL_STORE_R_UNSUPPORTED_OPERATION);
 166         return 0;
 167     }
 168
 169     return ctx->loader->find(ctx->loader_ctx, search);
 170 }
 171
 172 OSSL_STORE_INFO *OSSL_STORE_load(OSSL_STORE_CTX *ctx)
 173 {
 174     OSSL_STORE_INFO *v = NULL;
 175
 176     ctx->loading = 1;
 177  again:
 178     if (OSSL_STORE_eof(ctx))
 179         return NULL;
 180
 181     OSSL_TRACE(STORE, "Loading next object\n");
 182     v = ctx->loader->load(ctx->loader_ctx, ctx->ui_method, ctx->ui_data);
 183
 184     if (ctx->post_process != NULL && v != NULL) {
 185         v = ctx->post_process(v, ctx->post_process_data);
 186
 187         /*
 188          * By returning NULL, the callback decides that this object should
 189          * be ignored.
 190          */
 191         if (v == NULL)
 192             goto again;
 193     }
 194
 195     if (v != NULL && ctx->expected_type != 0) {
 196         int returned_type = OSSL_STORE_INFO_get_type(v);
 197
 198         if (returned_type != OSSL_STORE_INFO_NAME && returned_type != 0) {
 199             /*
 200              * Soft assert here so those who want to harsly weed out faulty
 201              * loaders can do so using a debugging version of libcrypto.
 202              */
 203             if (ctx->loader->expect != NULL)
 204                 assert(ctx->expected_type == returned_type);
 205
 206             if (ctx->expected_type != returned_type) {
 207                 OSSL_STORE_INFO_free(v);
 208                 goto again;
 209             }
 210         }
 211     }
 212
 213     if (v != NULL)
 214         OSSL_TRACE1(STORE, "Got a %s\n",
 215                     OSSL_STORE_INFO_type_string(OSSL_STORE_INFO_get_type(v)));
 216
 217     return v;
 218 }
 219
 220 int OSSL_STORE_error(OSSL_STORE_CTX *ctx)
 221 {
 222     return ctx->loader->error(ctx->loader_ctx);
 223 }
 224
 225 int OSSL_STORE_eof(OSSL_STORE_CTX *ctx)
 226 {
 227     return ctx->loader->eof(ctx->loader_ctx);
 228 }
 229
 230 int OSSL_STORE_close(OSSL_STORE_CTX *ctx)
 231 {
 232     int loader_ret;
 233
 234     OSSL_TRACE1(STORE, "Closing %p\n", (void *)ctx->loader_ctx);
 235     loader_ret = ctx->loader->close(ctx->loader_ctx);
 236
 237     OPENSSL_free(ctx);
 238     return loader_ret;
 239 }
 240
 241 /*
 242  * Functions to generate OSSL_STORE_INFOs, one function for each type we
 243  * support having in them as well as a generic constructor.
 244  *
 245  * In all cases, ownership of the object is transferred to the OSSL_STORE_INFO
 246  * and will therefore be freed when the OSSL_STORE_INFO is freed.
 247  */
 248 static OSSL_STORE_INFO *store_info_new(int type, void *data)
 249 {
 250     OSSL_STORE_INFO *info = OPENSSL_zalloc(sizeof(*info));
 251
 252     if (info == NULL)
 253         return NULL;
 254
 255     info->type = type;
 256     info->_.data = data;
 257     return info;
 258 }
 259
 260 OSSL_STORE_INFO *OSSL_STORE_INFO_new_NAME(char *name)
 261 {
 262     OSSL_STORE_INFO *info = store_info_new(OSSL_STORE_INFO_NAME, NULL);
 263
 264     if (info == NULL) {
 265         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_NEW_NAME,
 266                       ERR_R_MALLOC_FAILURE);
 267         return NULL;
 268     }
 269
 270     info->_.name.name = name;
 271     info->_.name.desc = NULL;
 272
 273     return info;
 274 }
 275
 276 int OSSL_STORE_INFO_set0_NAME_description(OSSL_STORE_INFO *info, char *desc)
 277 {
 278     if (info->type != OSSL_STORE_INFO_NAME) {
 279         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_SET0_NAME_DESCRIPTION,
 280                       ERR_R_PASSED_INVALID_ARGUMENT);
 281         return 0;
 282     }
 283
 284     info->_.name.desc = desc;
 285
 286     return 1;
 287 }
 288 OSSL_STORE_INFO *OSSL_STORE_INFO_new_PARAMS(EVP_PKEY *params)
 289 {
 290     OSSL_STORE_INFO *info = store_info_new(OSSL_STORE_INFO_PARAMS, params);
 291
 292     if (info == NULL)
 293         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_NEW_PARAMS,
 294                       ERR_R_MALLOC_FAILURE);
 295     return info;
 296 }
 297
 298 OSSL_STORE_INFO *OSSL_STORE_INFO_new_PKEY(EVP_PKEY *pkey)
 299 {
 300     OSSL_STORE_INFO *info = store_info_new(OSSL_STORE_INFO_PKEY, pkey);
 301
 302     if (info == NULL)
 303         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_NEW_PKEY,
 304                       ERR_R_MALLOC_FAILURE);
 305     return info;
 306 }
 307
 308 OSSL_STORE_INFO *OSSL_STORE_INFO_new_CERT(X509 *x509)
 309 {
 310     OSSL_STORE_INFO *info = store_info_new(OSSL_STORE_INFO_CERT, x509);
 311
 312     if (info == NULL)
 313         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_NEW_CERT,
 314                       ERR_R_MALLOC_FAILURE);
 315     return info;
 316 }
 317
 318 OSSL_STORE_INFO *OSSL_STORE_INFO_new_CRL(X509_CRL *crl)
 319 {
 320     OSSL_STORE_INFO *info = store_info_new(OSSL_STORE_INFO_CRL, crl);
 321
 322     if (info == NULL)
 323         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_NEW_CRL,
 324                       ERR_R_MALLOC_FAILURE);
 325     return info;
 326 }
 327
 328 /*
 329  * Functions to try to extract data from a OSSL_STORE_INFO.
 330  */
 331 int OSSL_STORE_INFO_get_type(const OSSL_STORE_INFO *info)
 332 {
 333     return info->type;
 334 }
 335
 336 const char *OSSL_STORE_INFO_get0_NAME(const OSSL_STORE_INFO *info)
 337 {
 338     if (info->type == OSSL_STORE_INFO_NAME)
 339         return info->_.name.name;
 340     return NULL;
 341 }
 342
 343 char *OSSL_STORE_INFO_get1_NAME(const OSSL_STORE_INFO *info)
 344 {
 345     if (info->type == OSSL_STORE_INFO_NAME) {
 346         char *ret = OPENSSL_strdup(info->_.name.name);
 347
 348         if (ret == NULL)
 349             OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_GET1_NAME,
 350                           ERR_R_MALLOC_FAILURE);
 351         return ret;
 352     }
 353     OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_GET1_NAME,
 354                   OSSL_STORE_R_NOT_A_NAME);
 355     return NULL;
 356 }
 357
 358 const char *OSSL_STORE_INFO_get0_NAME_description(const OSSL_STORE_INFO *info)
 359 {
 360     if (info->type == OSSL_STORE_INFO_NAME)
 361         return info->_.name.desc;
 362     return NULL;
 363 }
 364
 365 char *OSSL_STORE_INFO_get1_NAME_description(const OSSL_STORE_INFO *info)
 366 {
 367     if (info->type == OSSL_STORE_INFO_NAME) {
 368         char *ret = OPENSSL_strdup(info->_.name.desc
 369                                    ? info->_.name.desc : "");
 370
 371         if (ret == NULL)
 372             OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_GET1_NAME_DESCRIPTION,
 373                      ERR_R_MALLOC_FAILURE);
 374         return ret;
 375     }
 376     OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_GET1_NAME_DESCRIPTION,
 377                   OSSL_STORE_R_NOT_A_NAME);
 378     return NULL;
 379 }
 380
 381 EVP_PKEY *OSSL_STORE_INFO_get0_PARAMS(const OSSL_STORE_INFO *info)
 382 {
 383     if (info->type == OSSL_STORE_INFO_PARAMS)
 384         return info->_.params;
 385     return NULL;
 386 }
 387
 388 EVP_PKEY *OSSL_STORE_INFO_get1_PARAMS(const OSSL_STORE_INFO *info)
 389 {
 390     if (info->type == OSSL_STORE_INFO_PARAMS) {
 391         EVP_PKEY_up_ref(info->_.params);
 392         return info->_.params;
 393     }
 394     OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_GET1_PARAMS,
 395                   OSSL_STORE_R_NOT_PARAMETERS);
 396     return NULL;
 397 }
 398
 399 EVP_PKEY *OSSL_STORE_INFO_get0_PKEY(const OSSL_STORE_INFO *info)
 400 {
 401     if (info->type == OSSL_STORE_INFO_PKEY)
 402         return info->_.pkey;
 403     return NULL;
 404 }
 405
 406 EVP_PKEY *OSSL_STORE_INFO_get1_PKEY(const OSSL_STORE_INFO *info)
 407 {
 408     if (info->type == OSSL_STORE_INFO_PKEY) {
 409         EVP_PKEY_up_ref(info->_.pkey);
 410         return info->_.pkey;
 411     }
 412     OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_GET1_PKEY,
 413                   OSSL_STORE_R_NOT_A_KEY);
 414     return NULL;
 415 }
 416
 417 X509 *OSSL_STORE_INFO_get0_CERT(const OSSL_STORE_INFO *info)
 418 {
 419     if (info->type == OSSL_STORE_INFO_CERT)
 420         return info->_.x509;
 421     return NULL;
 422 }
 423
 424 X509 *OSSL_STORE_INFO_get1_CERT(const OSSL_STORE_INFO *info)
 425 {
 426     if (info->type == OSSL_STORE_INFO_CERT) {
 427         X509_up_ref(info->_.x509);
 428         return info->_.x509;
 429     }
 430     OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_GET1_CERT,
 431                   OSSL_STORE_R_NOT_A_CERTIFICATE);
 432     return NULL;
 433 }
 434
 435 X509_CRL *OSSL_STORE_INFO_get0_CRL(const OSSL_STORE_INFO *info)
 436 {
 437     if (info->type == OSSL_STORE_INFO_CRL)
 438         return info->_.crl;
 439     return NULL;
 440 }
 441
 442 X509_CRL *OSSL_STORE_INFO_get1_CRL(const OSSL_STORE_INFO *info)
 443 {
 444     if (info->type == OSSL_STORE_INFO_CRL) {
 445         X509_CRL_up_ref(info->_.crl);
 446         return info->_.crl;
 447     }
 448     OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_GET1_CRL,
 449                   OSSL_STORE_R_NOT_A_CRL);
 450     return NULL;
 451 }
 452
 453 /*
 454  * Free the OSSL_STORE_INFO
 455  */
 456 void OSSL_STORE_INFO_free(OSSL_STORE_INFO *info)
 457 {
 458     if (info != NULL) {
 459         switch (info->type) {
 460         case OSSL_STORE_INFO_EMBEDDED:
 461             BUF_MEM_free(info->_.embedded.blob);
 462             OPENSSL_free(info->_.embedded.pem_name);
 463             break;
 464         case OSSL_STORE_INFO_NAME:
 465             OPENSSL_free(info->_.name.name);
 466             OPENSSL_free(info->_.name.desc);
 467             break;
 468         case OSSL_STORE_INFO_PARAMS:
 469             EVP_PKEY_free(info->_.params);
 470             break;
 471         case OSSL_STORE_INFO_PKEY:
 472             EVP_PKEY_free(info->_.pkey);
 473             break;
 474         case OSSL_STORE_INFO_CERT:
 475             X509_free(info->_.x509);
 476             break;
 477         case OSSL_STORE_INFO_CRL:
 478             X509_CRL_free(info->_.crl);
 479             break;
 480         }
 481         OPENSSL_free(info);
 482     }
 483 }
 484
 485 int OSSL_STORE_supports_search(OSSL_STORE_CTX *ctx, int search_type)
 486 {
 487     OSSL_STORE_SEARCH tmp_search;
 488
 489     if (ctx->loader->find == NULL)
 490         return 0;
 491     tmp_search.search_type = search_type;
 492     return ctx->loader->find(NULL, &tmp_search);
 493 }
 494
 495 /* Search term constructors */
 496 OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_name(X509_NAME *name)
 497 {
 498     OSSL_STORE_SEARCH *search = OPENSSL_zalloc(sizeof(*search));
 499
 500     if (search == NULL) {
 501         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_SEARCH_BY_NAME,
 502                       ERR_R_MALLOC_FAILURE);
 503         return NULL;
 504     }
 505
 506     search->search_type = OSSL_STORE_SEARCH_BY_NAME;
 507     search->name = name;
 508     return search;
 509 }
 510
 511 OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_issuer_serial(X509_NAME *name,
 512                                                       const ASN1_INTEGER *serial)
 513 {
 514     OSSL_STORE_SEARCH *search = OPENSSL_zalloc(sizeof(*search));
 515
 516     if (search == NULL) {
 517         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_SEARCH_BY_ISSUER_SERIAL,
 518                       ERR_R_MALLOC_FAILURE);
 519         return NULL;
 520     }
 521
 522     search->search_type = OSSL_STORE_SEARCH_BY_ISSUER_SERIAL;
 523     search->name = name;
 524     search->serial = serial;
 525     return search;
 526 }
 527
 528 OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_key_fingerprint(const EVP_MD *digest,
 529                                                         const unsigned char
 530                                                         *bytes, size_t len)
 531 {
 532     OSSL_STORE_SEARCH *search = OPENSSL_zalloc(sizeof(*search));
 533
 534     if (search == NULL) {
 535         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_SEARCH_BY_KEY_FINGERPRINT,
 536                       ERR_R_MALLOC_FAILURE);
 537         return NULL;
 538     }
 539
 540     if (digest != NULL && len != (size_t)EVP_MD_size(digest)) {
 541         char buf1[20], buf2[20];
 542
 543         BIO_snprintf(buf1, sizeof(buf1), "%d", EVP_MD_size(digest));
 544         BIO_snprintf(buf2, sizeof(buf2), "%zu", len);
 545         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_SEARCH_BY_KEY_FINGERPRINT,
 546                       OSSL_STORE_R_FINGERPRINT_SIZE_DOES_NOT_MATCH_DIGEST);
 547         ERR_add_error_data(5, EVP_MD_name(digest), " size is ", buf1,
 548                            ", fingerprint size is ", buf2);
 549     }
 550
 551     search->search_type = OSSL_STORE_SEARCH_BY_KEY_FINGERPRINT;
 552     search->digest = digest;
 553     search->string = bytes;
 554     search->stringlength = len;
 555     return search;
 556 }
 557
 558 OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_alias(const char *alias)
 559 {
 560     OSSL_STORE_SEARCH *search = OPENSSL_zalloc(sizeof(*search));
 561
 562     if (search == NULL) {
 563         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_SEARCH_BY_ALIAS,
 564                       ERR_R_MALLOC_FAILURE);
 565         return NULL;
 566     }
 567
 568     search->search_type = OSSL_STORE_SEARCH_BY_ALIAS;
 569     search->string = (const unsigned char *)alias;
 570     search->stringlength = strlen(alias);
 571     return search;
 572 }
 573
 574 /* Search term destructor */
 575 void OSSL_STORE_SEARCH_free(OSSL_STORE_SEARCH *search)
 576 {
 577     OPENSSL_free(search);
 578 }
 579
 580 /* Search term accessors */
 581 int OSSL_STORE_SEARCH_get_type(const OSSL_STORE_SEARCH *criterion)
 582 {
 583     return criterion->search_type;
 584 }
 585
 586 X509_NAME *OSSL_STORE_SEARCH_get0_name(const OSSL_STORE_SEARCH *criterion)
 587 {
 588     return criterion->name;
 589 }
 590
 591 const ASN1_INTEGER *OSSL_STORE_SEARCH_get0_serial(const OSSL_STORE_SEARCH
 592                                                   *criterion)
 593 {
 594     return criterion->serial;
 595 }
 596
 597 const unsigned char *OSSL_STORE_SEARCH_get0_bytes(const OSSL_STORE_SEARCH
 598                                                   *criterion, size_t *length)
 599 {
 600     *length = criterion->stringlength;
 601     return criterion->string;
 602 }
 603
 604 const char *OSSL_STORE_SEARCH_get0_string(const OSSL_STORE_SEARCH *criterion)
 605 {
 606     return (const char *)criterion->string;
 607 }
 608
 609 const EVP_MD *OSSL_STORE_SEARCH_get0_digest(const OSSL_STORE_SEARCH *criterion)
 610 {
 611     return criterion->digest;
 612 }
 613
 614 /* Internal functions */
 615 OSSL_STORE_INFO *ossl_store_info_new_EMBEDDED(const char *new_pem_name,
 616                                               BUF_MEM *embedded)
 617 {
 618     OSSL_STORE_INFO *info = store_info_new(OSSL_STORE_INFO_EMBEDDED, NULL);
 619
 620     if (info == NULL) {
 621         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_NEW_EMBEDDED,
 622                       ERR_R_MALLOC_FAILURE);
 623         return NULL;
 624     }
 625
 626     info->_.embedded.blob = embedded;
 627     info->_.embedded.pem_name =
 628         new_pem_name == NULL ? NULL : OPENSSL_strdup(new_pem_name);
 629
 630     if (new_pem_name != NULL && info->_.embedded.pem_name == NULL) {
 631         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_INFO_NEW_EMBEDDED,
 632                       ERR_R_MALLOC_FAILURE);
 633         OSSL_STORE_INFO_free(info);
 634         info = NULL;
 635     }
 636
 637     return info;
 638 }
 639
 640 BUF_MEM *ossl_store_info_get0_EMBEDDED_buffer(OSSL_STORE_INFO *info)
 641 {
 642     if (info->type == OSSL_STORE_INFO_EMBEDDED)
 643         return info->_.embedded.blob;
 644     return NULL;
 645 }
 646
 647 char *ossl_store_info_get0_EMBEDDED_pem_name(OSSL_STORE_INFO *info)
 648 {
 649     if (info->type == OSSL_STORE_INFO_EMBEDDED)
 650         return info->_.embedded.pem_name;
 651     return NULL;
 652 }
 653
 654 OSSL_STORE_CTX *OSSL_STORE_attach(BIO *bp, OPENSSL_CTX *libctx,
 655                                   const char *scheme, const char *propq,
 656                                   const UI_METHOD *ui_method, void *ui_data,
 657                                   OSSL_STORE_post_process_info_fn post_process,
 658                                   void *post_process_data)
 659 {
 660     OSSL_STORE_CTX *ctx = NULL;
 661     const OSSL_STORE_LOADER *loader = NULL;
 662     OSSL_STORE_LOADER_CTX *loader_ctx = NULL;
 663
 664     if ((loader =
 665          ossl_store_get0_loader_int(scheme != NULL ? scheme : "file")) == NULL
 666         || (loader_ctx = loader->attach(loader, bp, libctx, propq,
 667                                         ui_method, ui_data)) == NULL)
 668         return NULL;
 669
 670     if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL) {
 671         OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_ATTACH, ERR_R_MALLOC_FAILURE);
 672         return NULL;
 673     }
 674
 675     ctx->loader = loader;
 676     ctx->loader_ctx = loader_ctx;
 677     ctx->ui_method = ui_method;
 678     ctx->ui_data = ui_data;
 679     ctx->post_process = post_process;
 680     ctx->post_process_data = post_process_data;
 681
 682     return ctx;
 683 }