2 * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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
10 #include "e_os.h" /* To get strncasecmp() on Windows */
16 #include <openssl/core.h>
17 #include <openssl/core_dispatch.h>
18 #include <openssl/core_names.h>
19 #include <openssl/core_object.h>
20 #include <openssl/crypto.h>
21 #include <openssl/bio.h>
22 #include <openssl/err.h>
23 #include <openssl/buffer.h>
24 #include <openssl/params.h>
25 #include <openssl/decoder.h>
26 #include <openssl/store.h> /* The OSSL_STORE_INFO type numbers */
27 #include "internal/cryptlib.h"
28 #include "internal/o_dir.h"
29 #include "crypto/pem.h" /* For PVK and "blob" PEM headers */
30 #include "crypto/decoder.h"
31 #include "prov/implementations.h"
33 #include "prov/provider_ctx.h"
34 #include "prov/providercommonerr.h"
35 #include "file_store_local.h"
37 DEFINE_STACK_OF(OSSL_STORE_INFO)
44 # define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
47 static OSSL_FUNC_store_open_fn file_open;
48 static OSSL_FUNC_store_attach_fn file_attach;
49 static OSSL_FUNC_store_settable_ctx_params_fn file_settable_ctx_params;
50 static OSSL_FUNC_store_set_ctx_params_fn file_set_ctx_params;
51 static OSSL_FUNC_store_load_fn file_load;
52 static OSSL_FUNC_store_eof_fn file_eof;
53 static OSSL_FUNC_store_close_fn file_close;
56 * This implementation makes full use of OSSL_DECODER, and then some.
57 * It uses its own internal decoder implementation that reads DER and
58 * passes that on to the data callback; this decoder is created with
59 * internal OpenSSL functions, thereby bypassing the need for a surrounding
60 * provider. This is ok, since this is a local decoder, not meant for
61 * public consumption. It also uses the libcrypto internal decoder
62 * setup function ossl_decoder_ctx_setup_for_EVP_PKEY(), to allow the
63 * last resort decoder to be added first (and thereby be executed last).
64 * Finally, it sets up its own construct and cleanup functions.
66 * Essentially, that makes this implementation a kind of glorified decoder.
71 char *uri; /* The URI we currently try to load */
73 IS_FILE = 0, /* Read file and pass results */
74 IS_DIR /* Pass directory entry names */
78 unsigned int flag_attached:1;
79 unsigned int flag_buffered:1;
82 /* Used with |IS_FILE| */
86 OSSL_DECODER_CTX *decoderctx;
88 char *propq; /* The properties we got as a parameter */
91 /* Used with |IS_DIR| */
97 * When a search expression is given, these are filled in.
98 * |search_name| contains the file basename to look for.
99 * The string is exactly 8 characters long.
104 * The directory reading utility we have combines opening with
105 * reading the first name. To make sure we can detect the end
106 * at the right time, we read early and cache the name.
108 const char *last_entry;
113 /* Expected object type. May be unspecified */
117 static void free_file_ctx(struct file_ctx_st *ctx)
122 OPENSSL_free(ctx->uri);
123 if (ctx->type != IS_DIR) {
124 OSSL_DECODER_CTX_free(ctx->_.file.decoderctx);
125 OPENSSL_free(ctx->_.file.propq);
126 OPENSSL_free(ctx->_.file.input_type);
131 static struct file_ctx_st *new_file_ctx(int type, const char *uri,
134 struct file_ctx_st *ctx = NULL;
136 if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) != NULL
137 && (uri == NULL || (ctx->uri = OPENSSL_strdup(uri)) != NULL)) {
139 ctx->provctx = provctx;
146 static OSSL_DECODER_CONSTRUCT file_load_construct;
147 static OSSL_DECODER_CLEANUP file_load_cleanup;
150 * Opening / attaching streams and directories
151 * -------------------------------------------
155 * Function to service both file_open() and file_attach()
159 static struct file_ctx_st *file_open_stream(BIO *source, const char *uri,
160 const char *input_type,
163 struct file_ctx_st *ctx;
165 if ((ctx = new_file_ctx(IS_FILE, uri, provctx)) == NULL
166 || (input_type != NULL
167 && (ctx->_.file.input_type =
168 OPENSSL_strdup(input_type)) == NULL)) {
169 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
173 ctx->_.file.file = source;
181 static void *file_open_dir(const char *path, const char *uri, void *provctx)
183 struct file_ctx_st *ctx;
185 if ((ctx = new_file_ctx(IS_DIR, uri, provctx)) == NULL) {
186 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
190 ctx->_.dir.last_entry = OPENSSL_DIR_read(&ctx->_.dir.ctx, path);
191 ctx->_.dir.last_errno = errno;
192 if (ctx->_.dir.last_entry == NULL) {
193 if (ctx->_.dir.last_errno != 0) {
194 ERR_raise_data(ERR_LIB_SYS, ctx->_.dir.last_errno,
195 "Calling OPENSSL_DIR_read(\"%s\")", path);
198 ctx->_.dir.end_reached = 1;
206 static void *file_open(void *provctx, const char *uri)
208 struct file_ctx_st *ctx = NULL;
212 unsigned int check_absolute:1;
214 size_t path_data_n = 0, i;
221 * First step, just take the URI as is.
223 path_data[path_data_n].check_absolute = 0;
224 path_data[path_data_n++].path = uri;
227 * Second step, if the URI appears to start with the 'file' scheme,
228 * extract the path and make that the second path to check.
229 * There's a special case if the URI also contains an authority, then
230 * the full URI shouldn't be used as a path anywhere.
232 if (strncasecmp(uri, "file:", 5) == 0) {
233 const char *p = &uri[5];
235 if (strncmp(&uri[5], "//", 2) == 0) {
236 path_data_n--; /* Invalidate using the full URI */
237 if (strncasecmp(&uri[7], "localhost/", 10) == 0) {
239 } else if (uri[7] == '/') {
242 ERR_clear_last_mark();
243 ERR_raise(ERR_LIB_PROV, PROV_R_URI_AUTHORITY_UNSUPPORTED);
248 path_data[path_data_n].check_absolute = 1;
250 /* Windows file: URIs with a drive letter start with a / */
251 if (p[0] == '/' && p[2] == ':' && p[3] == '/') {
252 char c = tolower(p[1]);
254 if (c >= 'a' && c <= 'z') {
256 /* We know it's absolute, so no need to check */
257 path_data[path_data_n].check_absolute = 0;
261 path_data[path_data_n++].path = p;
265 for (i = 0, path = NULL; path == NULL && i < path_data_n; i++) {
267 * If the scheme "file" was an explicit part of the URI, the path must
268 * be absolute. So says RFC 8089
270 if (path_data[i].check_absolute && path_data[i].path[0] != '/') {
271 ERR_clear_last_mark();
272 ERR_raise_data(ERR_LIB_PROV, PROV_R_PATH_MUST_BE_ABSOLUTE,
273 "Given path=%s", path_data[i].path);
277 if (stat(path_data[i].path, &st) < 0) {
278 ERR_raise_data(ERR_LIB_SYS, errno,
282 path = path_data[i].path;
286 ERR_clear_last_mark();
290 /* Successfully found a working path, clear possible collected errors */
293 if (S_ISDIR(st.st_mode))
294 ctx = file_open_dir(path, uri, provctx);
295 else if ((bio = BIO_new_file(path, "rb")) == NULL
296 || (ctx = file_open_stream(bio, uri, NULL, provctx)) == NULL)
303 * Attached input streams must be treated very very carefully to avoid
306 * This implementation tries to support input streams that can't be reset,
307 * such as standard input. However, OSSL_DECODER assumes resettable streams,
308 * and because the PEM decoder may read quite a bit of the input file to skip
309 * past any non-PEM text that precedes the PEM block, we may need to detect
310 * if the input stream is a PEM file early.
312 * If the input stream supports BIO_tell(), we assume that it also supports
313 * BIO_seek(), making it a resettable stream and therefore safe to fully
314 * unleash OSSL_DECODER.
316 * If the input stream doesn't support BIO_tell(), we must assume that we
317 * have a non-resettable stream, and must tread carefully. We do so by
318 * trying to detect if the input is PEM, MSBLOB or PVK, and if not, we
319 * assume that it's DER.
321 * To detect if an input stream is PEM, MSBLOB or PVK, we use the buffer BIO
322 * filter, which allows us a 4KiB resettable read-ahead. We *hope* that 4KiB
323 * will be enough to find the start of the PEM block.
325 * It should be possible to use this same technique to detect other file
328 * An alternative technique would be to have an endlessly caching BIO filter.
329 * That would take away the need for all the detection here, and simply leave
330 * it for OSSL_DECODER to find out on its own while supporting its demand for
331 * resettable input streams.
332 * That's a possible future development.
335 # define INPUT_TYPE_ANY NULL
336 # define INPUT_TYPE_DER "DER"
337 # define INPUT_TYPE_PEM "PEM"
338 # define INPUT_TYPE_MSBLOB "MSBLOB"
339 # define INPUT_TYPE_PVK "PVK"
341 void *file_attach(void *provctx, OSSL_CORE_BIO *cin)
343 BIO *new_bio = bio_new_from_core_bio(provctx, cin);
344 BIO *new_bio_tmp = NULL;
346 char peekbuf[4096] = { 0, };
348 const char *input_type = NULL;
349 unsigned int flag_attached = 1;
350 unsigned int flag_buffered = 0;
351 struct file_ctx_st *ctx = NULL;
356 /* Try to get the current position */
357 loc = BIO_tell(new_bio);
359 if ((buff = BIO_new(BIO_f_buffer())) == NULL
360 || (new_bio_tmp = BIO_push(buff, new_bio)) == NULL)
363 /* Assumption, if we can't detect PEM */
364 input_type = INPUT_TYPE_DER;
366 new_bio = new_bio_tmp;
368 if (BIO_buffer_peek(new_bio, peekbuf, sizeof(peekbuf) - 1) > 0) {
369 #ifndef OPENSSL_NO_DSA
370 const unsigned char *p = NULL;
371 unsigned int magic = 0, bitlen = 0;
372 int isdss = 0, ispub = -1;
373 # ifndef OPENSSL_NO_RC4
374 unsigned int saltlen = 0, keylen = 0;
378 peekbuf[sizeof(peekbuf) - 1] = '\0';
379 if (strstr(peekbuf, "-----BEGIN ") != NULL)
380 input_type = INPUT_TYPE_PEM;
381 #ifndef OPENSSL_NO_DSA
382 else if (p = (unsigned char *)peekbuf,
383 ossl_do_blob_header(&p, sizeof(peekbuf), &magic, &bitlen,
385 input_type = INPUT_TYPE_MSBLOB;
386 # ifndef OPENSSL_NO_RC4
387 else if (p = (unsigned char *)peekbuf,
388 ossl_do_PVK_header(&p, sizeof(peekbuf), 0, &saltlen, &keylen))
389 input_type = INPUT_TYPE_PVK;
395 * After peeking, we know that the underlying source BIO has moved ahead
396 * from its earlier position and that if it supports BIO_tell(), that
397 * should be a number that differs from |loc|. Otherwise, we will get
398 * the same value, which may one of:
400 * - zero (the source BIO doesn't support BIO_tell() / BIO_seek() /
402 * - -1 (the underlying operating system / C library routines do not
403 * support BIO_tell() / BIO_seek() / BIO_reset())
405 * If it turns out that the source BIO does support BIO_tell(), we pop
406 * the buffer BIO filter and mark this input as |INPUT_TYPE_ANY|, which
407 * fully unleashes OSSL_DECODER to do its thing.
409 if (BIO_tell(new_bio) != loc) {
410 /* In this case, anything goes */
411 input_type = INPUT_TYPE_ANY;
413 /* Restore the source BIO like it was when entering this function */
414 new_bio = BIO_pop(buff);
416 (void)BIO_seek(new_bio, loc);
421 if ((ctx = file_open_stream(new_bio, NULL, input_type, provctx)) == NULL)
424 ctx->flag_attached = flag_attached;
425 ctx->flag_buffered = flag_buffered;
430 new_bio = BIO_pop(buff);
433 BIO_free(new_bio); /* Removes the provider BIO filter */
442 static const OSSL_PARAM *file_settable_ctx_params(void *provctx)
444 static const OSSL_PARAM known_settable_ctx_params[] = {
445 OSSL_PARAM_utf8_string(OSSL_STORE_PARAM_PROPERTIES, NULL, 0),
446 OSSL_PARAM_int(OSSL_STORE_PARAM_EXPECT, NULL),
447 OSSL_PARAM_octet_string(OSSL_STORE_PARAM_SUBJECT, NULL, 0),
450 return known_settable_ctx_params;
453 static int file_set_ctx_params(void *loaderctx, const OSSL_PARAM params[])
455 struct file_ctx_st *ctx = loaderctx;
458 p = OSSL_PARAM_locate_const(params, OSSL_STORE_PARAM_PROPERTIES);
460 OPENSSL_free(ctx->_.file.propq);
461 ctx->_.file.propq = NULL;
462 if (!OSSL_PARAM_get_utf8_string(p, &ctx->_.file.propq, 0))
465 p = OSSL_PARAM_locate_const(params, OSSL_STORE_PARAM_EXPECT);
466 if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->expected_type))
468 p = OSSL_PARAM_locate_const(params, OSSL_STORE_PARAM_SUBJECT);
470 const unsigned char *der = NULL;
472 X509_NAME *x509_name;
475 if (ctx->type != IS_DIR) {
476 ERR_raise(ERR_LIB_PROV,
477 PROV_R_SEARCH_ONLY_SUPPORTED_FOR_DIRECTORIES);
481 if (!OSSL_PARAM_get_octet_string_ptr(p, (const void **)&der, &der_len)
482 || (x509_name = d2i_X509_NAME(NULL, &der, der_len)) == NULL)
484 hash = X509_NAME_hash(x509_name);
485 BIO_snprintf(ctx->_.dir.search_name, sizeof(ctx->_.dir.search_name),
487 X509_NAME_free(x509_name);
493 * Loading an object from a stream
494 * -------------------------------
497 struct file_load_data_st {
498 OSSL_CALLBACK *object_cb;
502 static int file_load_construct(OSSL_DECODER_INSTANCE *decoder_inst,
503 const OSSL_PARAM *params, void *construct_data)
505 struct file_load_data_st *data = construct_data;
508 * At some point, we may find it justifiable to recognise PKCS#12 and
509 * handle it specially here, making |file_load()| return pass its
510 * contents one piece at ta time, like |e_loader_attic.c| does.
512 * However, that currently means parsing them out, which converts the
513 * DER encoded PKCS#12 into a bunch of EVP_PKEYs and X509s, just to
514 * have to re-encode them into DER to create an object abstraction for
516 * It's much simpler (less churn) to pass on the object abstraction we
517 * get to the load_result callback and leave it to that one to do the
518 * work. If that's libcrypto code, we know that it has much better
519 * possibilities to handle the EVP_PKEYs and X509s without the extra
523 return data->object_cb(params, data->object_cbarg);
526 void file_load_cleanup(void *construct_data)
531 static int file_setup_decoders(struct file_ctx_st *ctx)
533 EVP_PKEY *dummy; /* for OSSL_DECODER_CTX_new_by_EVP_PKEY() */
534 OSSL_LIB_CTX *libctx = ossl_prov_ctx_get0_libctx(ctx->provctx);
535 OSSL_DECODER *to_obj = NULL; /* Last resort decoder */
536 OSSL_DECODER_INSTANCE *to_obj_inst = NULL;
537 OSSL_DECODER_CLEANUP *old_cleanup = NULL;
538 void *old_construct_data = NULL;
541 /* Setup for this session, so only if not already done */
542 if (ctx->_.file.decoderctx == NULL) {
543 if ((ctx->_.file.decoderctx = OSSL_DECODER_CTX_new()) == NULL) {
544 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
548 /* Make sure the input type is set */
549 if (!OSSL_DECODER_CTX_set_input_type(ctx->_.file.decoderctx,
550 ctx->_.file.input_type)) {
551 ERR_raise(ERR_LIB_PROV, ERR_R_OSSL_DECODER_LIB);
556 * Create the internal last resort decoder implementation together
557 * with a "decoder instance".
558 * The decoder doesn't need any identification or to be attached to
559 * any provider, since it's only used locally.
561 to_obj = ossl_decoder_from_dispatch(0, &ossl_der_to_obj_algorithm,
565 to_obj_inst = ossl_decoder_instance_new(to_obj, ctx->provctx);
566 if (to_obj_inst == NULL)
569 if (!ossl_decoder_ctx_add_decoder_inst(ctx->_.file.decoderctx,
571 ERR_raise(ERR_LIB_PROV, ERR_R_OSSL_DECODER_LIB);
576 * OSSL_DECODER_INSTANCE shouldn't be freed from this point on.
577 * That's going to happen whenever the OSSL_DECODER_CTX is freed.
582 * Add on the usual decoder context for keys, with a dummy object.
583 * Since we're setting up our own constructor, we don't need to care
586 if (!ossl_decoder_ctx_setup_for_EVP_PKEY(ctx->_.file.decoderctx,
588 libctx, ctx->_.file.propq)
589 || !OSSL_DECODER_CTX_add_extra(ctx->_.file.decoderctx,
590 libctx, ctx->_.file.propq)) {
591 ERR_raise(ERR_LIB_PROV, ERR_R_OSSL_DECODER_LIB);
596 * Then we throw away the installed finalizer data, and install our
599 old_cleanup = OSSL_DECODER_CTX_get_cleanup(ctx->_.file.decoderctx);
601 OSSL_DECODER_CTX_get_construct_data(ctx->_.file.decoderctx);
602 if (old_cleanup != NULL)
603 old_cleanup(old_construct_data);
608 if (!OSSL_DECODER_CTX_set_construct(ctx->_.file.decoderctx,
610 || !OSSL_DECODER_CTX_set_cleanup(ctx->_.file.decoderctx,
611 file_load_cleanup)) {
612 ERR_raise(ERR_LIB_PROV, ERR_R_OSSL_DECODER_LIB);
619 OSSL_DECODER_free(to_obj);
623 static int file_load_file(struct file_ctx_st *ctx,
624 OSSL_CALLBACK *object_cb, void *object_cbarg,
625 OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg)
627 struct file_load_data_st data;
629 /* Setup the decoders (one time shot per session */
631 if (!file_setup_decoders(ctx))
634 /* Setup for this object */
636 data.object_cb = object_cb;
637 data.object_cbarg = object_cbarg;
638 OSSL_DECODER_CTX_set_construct_data(ctx->_.file.decoderctx, &data);
639 OSSL_DECODER_CTX_set_passphrase_cb(ctx->_.file.decoderctx, pw_cb, pw_cbarg);
643 return OSSL_DECODER_from_bio(ctx->_.file.decoderctx, ctx->_.file.file);
647 * Loading a name object from a directory
648 * --------------------------------------
651 static char *file_name_to_uri(struct file_ctx_st *ctx, const char *name)
655 assert(name != NULL);
657 const char *pathsep = ossl_ends_with_dirsep(ctx->uri) ? "" : "/";
658 long calculated_length = strlen(ctx->uri) + strlen(pathsep)
659 + strlen(name) + 1 /* \0 */;
661 data = OPENSSL_zalloc(calculated_length);
663 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
667 OPENSSL_strlcat(data, ctx->uri, calculated_length);
668 OPENSSL_strlcat(data, pathsep, calculated_length);
669 OPENSSL_strlcat(data, name, calculated_length);
674 static int file_name_check(struct file_ctx_st *ctx, const char *name)
676 const char *p = NULL;
678 /* If there are no search criteria, all names are accepted */
679 if (ctx->_.dir.search_name[0] == '\0')
682 /* If the expected type isn't supported, no name is accepted */
683 if (ctx->expected_type != 0
684 && ctx->expected_type != OSSL_STORE_INFO_CERT
685 && ctx->expected_type != OSSL_STORE_INFO_CRL)
689 * First, check the basename
691 if (strncasecmp(name, ctx->_.dir.search_name,
692 sizeof(ctx->_.dir.search_name) - 1) != 0
693 || name[sizeof(ctx->_.dir.search_name) - 1] != '.')
695 p = &name[sizeof(ctx->_.dir.search_name)];
698 * Then, if the expected type is a CRL, check that the extension starts
703 if (ctx->expected_type != 0
704 && ctx->expected_type != OSSL_STORE_INFO_CRL)
706 } else if (ctx->expected_type == OSSL_STORE_INFO_CRL) {
711 * Last, check that the rest of the extension is a decimal number, at
712 * least one digit long.
721 * One extra step here, check for a possible generation number.
724 for (p++; *p != '\0'; p++)
725 if (!ossl_isdigit(*p))
730 * If we've reached the end of the string at this point, we've successfully
731 * found a fitting file name.
736 static int file_load_dir_entry(struct file_ctx_st *ctx,
737 OSSL_CALLBACK *object_cb, void *object_cbarg,
738 OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg)
740 /* Prepare as much as possible in advance */
741 static const int object_type = OSSL_OBJECT_NAME;
742 OSSL_PARAM object[] = {
743 OSSL_PARAM_int(OSSL_OBJECT_PARAM_TYPE, (int *)&object_type),
744 OSSL_PARAM_utf8_string(OSSL_OBJECT_PARAM_DATA, NULL, 0),
747 char *newname = NULL;
750 /* Loop until we get an error or until we have a suitable name */
752 if (ctx->_.dir.last_entry == NULL) {
753 if (!ctx->_.dir.end_reached) {
754 assert(ctx->_.dir.last_errno != 0);
755 ERR_raise(ERR_LIB_SYS, ctx->_.dir.last_errno);
757 /* file_eof() will tell if EOF was reached */
761 /* flag acceptable names */
762 if (ctx->_.dir.last_entry[0] != '.'
763 && file_name_check(ctx, ctx->_.dir.last_entry)) {
765 /* If we can't allocate the new name, we fail */
767 file_name_to_uri(ctx, ctx->_.dir.last_entry)) == NULL)
772 * On the first call (with a NULL context), OPENSSL_DIR_read()
773 * cares about the second argument. On the following calls, it
774 * only cares that it isn't NULL. Therefore, we can safely give
777 ctx->_.dir.last_entry = OPENSSL_DIR_read(&ctx->_.dir.ctx, ctx->uri);
778 ctx->_.dir.last_errno = errno;
779 if (ctx->_.dir.last_entry == NULL && ctx->_.dir.last_errno == 0)
780 ctx->_.dir.end_reached = 1;
781 } while (newname == NULL);
783 object[1].data = newname;
784 object[1].data_size = strlen(newname);
785 ok = object_cb(object, object_cbarg);
786 OPENSSL_free(newname);
791 * Loading, local dispatcher
792 * -------------------------
795 static int file_load(void *loaderctx,
796 OSSL_CALLBACK *object_cb, void *object_cbarg,
797 OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg)
799 struct file_ctx_st *ctx = loaderctx;
803 return file_load_file(ctx, object_cb, object_cbarg, pw_cb, pw_cbarg);
806 file_load_dir_entry(ctx, object_cb, object_cbarg, pw_cb, pw_cbarg);
811 /* ctx->type has an unexpected value */
817 * Eof detection and closing
818 * -------------------------
821 static int file_eof(void *loaderctx)
823 struct file_ctx_st *ctx = loaderctx;
827 return ctx->_.dir.end_reached;
830 * BIO_pending() checks any filter BIO.
831 * BIO_eof() checks the source BIO.
833 return !BIO_pending(ctx->_.file.file)
834 && BIO_eof(ctx->_.file.file);
837 /* ctx->type has an unexpected value */
842 static int file_close_dir(struct file_ctx_st *ctx)
844 if (ctx->_.dir.ctx != NULL)
845 OPENSSL_DIR_end(&ctx->_.dir.ctx);
850 static int file_close_stream(struct file_ctx_st *ctx)
852 if (ctx->flag_buffered) {
854 * file_attach() pushed a BIO_f_buffer() on top of the regular BIO.
857 BIO *buff = ctx->_.file.file;
860 ctx->_.file.file = BIO_pop(ctx->_.file.file);
866 * If it was attached, we only free the top, as that's the provider BIO
867 * filter. Otherwise, it was entirely allocated by this implementation,
868 * and can safely be completely freed.
870 if (ctx->flag_attached)
871 BIO_free(ctx->_.file.file);
873 BIO_free_all(ctx->_.file.file);
875 /* To avoid double free */
876 ctx->_.file.file = NULL;
882 static int file_close(void *loaderctx)
884 struct file_ctx_st *ctx = loaderctx;
888 return file_close_dir(ctx);
890 return file_close_stream(ctx);
893 /* ctx->type has an unexpected value */
898 const OSSL_DISPATCH ossl_file_store_functions[] = {
899 { OSSL_FUNC_STORE_OPEN, (void (*)(void))file_open },
900 { OSSL_FUNC_STORE_ATTACH, (void (*)(void))file_attach },
901 { OSSL_FUNC_STORE_SETTABLE_CTX_PARAMS,
902 (void (*)(void))file_settable_ctx_params },
903 { OSSL_FUNC_STORE_SET_CTX_PARAMS, (void (*)(void))file_set_ctx_params },
904 { OSSL_FUNC_STORE_LOAD, (void (*)(void))file_load },
905 { OSSL_FUNC_STORE_EOF, (void (*)(void))file_eof },
906 { OSSL_FUNC_STORE_CLOSE, (void (*)(void))file_close },