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[thirdparty/openssl.git] / crypto / store / loader_file.c
1 /*
2 * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include "e_os.h"
11 #include <string.h>
12 #include <sys/stat.h>
13 #include <ctype.h>
14 #include <assert.h>
15
16 #include <openssl/bio.h>
17 #include <openssl/dsa.h> /* For d2i_DSAPrivateKey */
18 #include <openssl/err.h>
19 #include <openssl/evp.h>
20 #include <openssl/pem.h>
21 #include <openssl/pkcs12.h> /* For the PKCS8 stuff o.O */
22 #include <openssl/rsa.h> /* For d2i_RSAPrivateKey */
23 #include <openssl/safestack.h>
24 #include <openssl/store.h>
25 #include <openssl/ui.h>
26 #include <openssl/x509.h> /* For the PKCS8 stuff o.O */
27 #include "internal/asn1_int.h"
28 #include "internal/ctype.h"
29 #include "internal/o_dir.h"
30 #include "internal/cryptlib.h"
31 #include "internal/store_int.h"
32 #include "store_locl.h"
33
34 #ifdef _WIN32
35 # define stat _stat
36 #endif
37
38 #ifndef S_ISDIR
39 # define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
40 #endif
41
42 /*-
43 * Password prompting
44 * ------------------
45 */
46
47 static char *file_get_pass(const UI_METHOD *ui_method, char *pass,
48 size_t maxsize, const char *prompt_info, void *data)
49 {
50 UI *ui = UI_new();
51 char *prompt = NULL;
52
53 if (ui == NULL) {
54 OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_MALLOC_FAILURE);
55 return NULL;
56 }
57
58 if (ui_method != NULL)
59 UI_set_method(ui, ui_method);
60 UI_add_user_data(ui, data);
61
62 if ((prompt = UI_construct_prompt(ui, "pass phrase",
63 prompt_info)) == NULL) {
64 OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_MALLOC_FAILURE);
65 pass = NULL;
66 } else if (!UI_add_input_string(ui, prompt, UI_INPUT_FLAG_DEFAULT_PWD,
67 pass, 0, maxsize - 1)) {
68 OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_UI_LIB);
69 pass = NULL;
70 } else {
71 switch (UI_process(ui)) {
72 case -2:
73 OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS,
74 OSSL_STORE_R_UI_PROCESS_INTERRUPTED_OR_CANCELLED);
75 pass = NULL;
76 break;
77 case -1:
78 OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_UI_LIB);
79 pass = NULL;
80 break;
81 default:
82 break;
83 }
84 }
85
86 OPENSSL_free(prompt);
87 UI_free(ui);
88 return pass;
89 }
90
91 struct pem_pass_data {
92 const UI_METHOD *ui_method;
93 void *data;
94 const char *prompt_info;
95 };
96
97 static int file_fill_pem_pass_data(struct pem_pass_data *pass_data,
98 const char *prompt_info,
99 const UI_METHOD *ui_method, void *ui_data)
100 {
101 if (pass_data == NULL)
102 return 0;
103 pass_data->ui_method = ui_method;
104 pass_data->data = ui_data;
105 pass_data->prompt_info = prompt_info;
106 return 1;
107 }
108
109 /* This is used anywhere a pem_password_cb is needed */
110 static int file_get_pem_pass(char *buf, int num, int w, void *data)
111 {
112 struct pem_pass_data *pass_data = data;
113 char *pass = file_get_pass(pass_data->ui_method, buf, num,
114 pass_data->prompt_info, pass_data->data);
115
116 return pass == NULL ? 0 : strlen(pass);
117 }
118
119 /*-
120 * The file scheme decoders
121 * ------------------------
122 *
123 * Each possible data type has its own decoder, which either operates
124 * through a given PEM name, or attempts to decode to see if the blob
125 * it's given is decodable for its data type. The assumption is that
126 * only the correct data type will match the content.
127 */
128
129 /*-
130 * The try_decode function is called to check if the blob of data can
131 * be used by this handler, and if it can, decodes it into a supported
132 * OpenSSL type and returns a OSSL_STORE_INFO with the decoded data.
133 * Input:
134 * pem_name: If this blob comes from a PEM file, this holds
135 * the PEM name. If it comes from another type of
136 * file, this is NULL.
137 * pem_header: If this blob comes from a PEM file, this holds
138 * the PEM headers. If it comes from another type of
139 * file, this is NULL.
140 * blob: The blob of data to match with what this handler
141 * can use.
142 * len: The length of the blob.
143 * handler_ctx: For a handler marked repeatable, this pointer can
144 * be used to create a context for the handler. IT IS
145 * THE HANDLER'S RESPONSIBILITY TO CREATE AND DESTROY
146 * THIS CONTEXT APPROPRIATELY, i.e. create on first call
147 * and destroy when about to return NULL.
148 * matchcount: A pointer to an int to count matches for this data.
149 * Usually becomes 0 (no match) or 1 (match!), but may
150 * be higher in the (unlikely) event that the data matches
151 * more than one possibility. The int will always be
152 * zero when the function is called.
153 * ui_method: Application UI method for getting a password, pin
154 * or any other interactive data.
155 * ui_data: Application data to be passed to ui_method when
156 * it's called.
157 * Output:
158 * a OSSL_STORE_INFO
159 */
160 typedef OSSL_STORE_INFO *(*file_try_decode_fn)(const char *pem_name,
161 const char *pem_header,
162 const unsigned char *blob,
163 size_t len, void **handler_ctx,
164 int *matchcount,
165 const UI_METHOD *ui_method,
166 void *ui_data);
167 /*
168 * The eof function should return 1 if there's no more data to be found
169 * with the handler_ctx, otherwise 0. This is only used when the handler is
170 * marked repeatable.
171 */
172 typedef int (*file_eof_fn)(void *handler_ctx);
173 /*
174 * The destroy_ctx function is used to destroy the handler_ctx that was
175 * initiated by a repeatable try_decode function. This is only used when
176 * the handler is marked repeatable.
177 */
178 typedef void (*file_destroy_ctx_fn)(void **handler_ctx);
179
180 typedef struct file_handler_st {
181 const char *name;
182 file_try_decode_fn try_decode;
183 file_eof_fn eof;
184 file_destroy_ctx_fn destroy_ctx;
185
186 /* flags */
187 int repeatable;
188 } FILE_HANDLER;
189
190 /*
191 * PKCS#12 decoder. It operates by decoding all of the blob content,
192 * extracting all the interesting data from it and storing them internally,
193 * then serving them one piece at a time.
194 */
195 static OSSL_STORE_INFO *try_decode_PKCS12(const char *pem_name,
196 const char *pem_header,
197 const unsigned char *blob,
198 size_t len, void **pctx,
199 int *matchcount,
200 const UI_METHOD *ui_method,
201 void *ui_data)
202 {
203 OSSL_STORE_INFO *store_info = NULL;
204 STACK_OF(OSSL_STORE_INFO) *ctx = *pctx;
205
206 if (ctx == NULL) {
207 /* Initial parsing */
208 PKCS12 *p12;
209 int ok = 0;
210
211 if (pem_name != NULL)
212 /* No match, there is no PEM PKCS12 tag */
213 return NULL;
214
215 if ((p12 = d2i_PKCS12(NULL, &blob, len)) != NULL) {
216 char *pass = NULL;
217 char tpass[PEM_BUFSIZE];
218 EVP_PKEY *pkey = NULL;
219 X509 *cert = NULL;
220 STACK_OF(X509) *chain = NULL;
221
222 *matchcount = 1;
223
224 if (PKCS12_verify_mac(p12, "", 0)
225 || PKCS12_verify_mac(p12, NULL, 0)) {
226 pass = "";
227 } else {
228 if ((pass = file_get_pass(ui_method, tpass, PEM_BUFSIZE,
229 "PKCS12 import password",
230 ui_data)) == NULL) {
231 OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS12,
232 OSSL_STORE_R_PASSPHRASE_CALLBACK_ERROR);
233 goto p12_end;
234 }
235 if (!PKCS12_verify_mac(p12, pass, strlen(pass))) {
236 OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS12,
237 OSSL_STORE_R_ERROR_VERIFYING_PKCS12_MAC);
238 goto p12_end;
239 }
240 }
241
242 if (PKCS12_parse(p12, pass, &pkey, &cert, &chain)) {
243 OSSL_STORE_INFO *osi_pkey = NULL;
244 OSSL_STORE_INFO *osi_cert = NULL;
245 OSSL_STORE_INFO *osi_ca = NULL;
246
247 if ((ctx = sk_OSSL_STORE_INFO_new_null()) != NULL
248 && (osi_pkey = OSSL_STORE_INFO_new_PKEY(pkey)) != NULL
249 && sk_OSSL_STORE_INFO_push(ctx, osi_pkey) != 0
250 && (osi_cert = OSSL_STORE_INFO_new_CERT(cert)) != NULL
251 && sk_OSSL_STORE_INFO_push(ctx, osi_cert) != 0) {
252 ok = 1;
253 osi_pkey = NULL;
254 osi_cert = NULL;
255
256 while(sk_X509_num(chain) > 0) {
257 X509 *ca = sk_X509_value(chain, 0);
258
259 if ((osi_ca = OSSL_STORE_INFO_new_CERT(ca)) == NULL
260 || sk_OSSL_STORE_INFO_push(ctx, osi_ca) == 0) {
261 ok = 0;
262 break;
263 }
264 osi_ca = NULL;
265 (void)sk_X509_shift(chain);
266 }
267 }
268 if (!ok) {
269 OSSL_STORE_INFO_free(osi_ca);
270 OSSL_STORE_INFO_free(osi_cert);
271 OSSL_STORE_INFO_free(osi_pkey);
272 sk_OSSL_STORE_INFO_pop_free(ctx, OSSL_STORE_INFO_free);
273 EVP_PKEY_free(pkey);
274 X509_free(cert);
275 sk_X509_pop_free(chain, X509_free);
276 ctx = NULL;
277 }
278 *pctx = ctx;
279 }
280 }
281 p12_end:
282 PKCS12_free(p12);
283 if (!ok)
284 return NULL;
285 }
286
287 if (ctx != NULL) {
288 *matchcount = 1;
289 store_info = sk_OSSL_STORE_INFO_shift(ctx);
290 }
291
292 return store_info;
293 }
294
295 static int eof_PKCS12(void *ctx_)
296 {
297 STACK_OF(OSSL_STORE_INFO) *ctx = ctx_;
298
299 return ctx == NULL || sk_OSSL_STORE_INFO_num(ctx) == 0;
300 }
301
302 static void destroy_ctx_PKCS12(void **pctx)
303 {
304 STACK_OF(OSSL_STORE_INFO) *ctx = *pctx;
305
306 sk_OSSL_STORE_INFO_pop_free(ctx, OSSL_STORE_INFO_free);
307 *pctx = NULL;
308 }
309
310 static FILE_HANDLER PKCS12_handler = {
311 "PKCS12",
312 try_decode_PKCS12,
313 eof_PKCS12,
314 destroy_ctx_PKCS12,
315 1 /* repeatable */
316 };
317
318 /*
319 * Encrypted PKCS#8 decoder. It operates by just decrypting the given blob
320 * into a new blob, which is returned as an EMBEDDED STORE_INFO. The whole
321 * decoding process will then start over with the new blob.
322 */
323 static OSSL_STORE_INFO *try_decode_PKCS8Encrypted(const char *pem_name,
324 const char *pem_header,
325 const unsigned char *blob,
326 size_t len, void **pctx,
327 int *matchcount,
328 const UI_METHOD *ui_method,
329 void *ui_data)
330 {
331 X509_SIG *p8 = NULL;
332 char kbuf[PEM_BUFSIZE];
333 char *pass = NULL;
334 const X509_ALGOR *dalg = NULL;
335 const ASN1_OCTET_STRING *doct = NULL;
336 OSSL_STORE_INFO *store_info = NULL;
337 BUF_MEM *mem = NULL;
338 unsigned char *new_data = NULL;
339 int new_data_len;
340
341 if (pem_name != NULL) {
342 if (strcmp(pem_name, PEM_STRING_PKCS8) != 0)
343 return NULL;
344 *matchcount = 1;
345 }
346
347 if ((p8 = d2i_X509_SIG(NULL, &blob, len)) == NULL)
348 return NULL;
349
350 *matchcount = 1;
351
352 if ((mem = BUF_MEM_new()) == NULL) {
353 OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS8ENCRYPTED,
354 ERR_R_MALLOC_FAILURE);
355 goto nop8;
356 }
357
358 if ((pass = file_get_pass(ui_method, kbuf, PEM_BUFSIZE,
359 "PKCS8 decrypt password", ui_data)) == NULL) {
360 OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS8ENCRYPTED,
361 OSSL_STORE_R_BAD_PASSWORD_READ);
362 goto nop8;
363 }
364
365 X509_SIG_get0(p8, &dalg, &doct);
366 if (!PKCS12_pbe_crypt(dalg, pass, strlen(pass), doct->data, doct->length,
367 &new_data, &new_data_len, 0))
368 goto nop8;
369
370 mem->data = (char *)new_data;
371 mem->max = mem->length = (size_t)new_data_len;
372 X509_SIG_free(p8);
373
374 store_info = ossl_store_info_new_EMBEDDED(PEM_STRING_PKCS8INF, mem);
375 if (store_info == NULL) {
376 OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS8ENCRYPTED,
377 ERR_R_MALLOC_FAILURE);
378 goto nop8;
379 }
380
381 return store_info;
382 nop8:
383 X509_SIG_free(p8);
384 BUF_MEM_free(mem);
385 return NULL;
386 }
387
388 static FILE_HANDLER PKCS8Encrypted_handler = {
389 "PKCS8Encrypted",
390 try_decode_PKCS8Encrypted
391 };
392
393 /*
394 * Private key decoder. Decodes all sorts of private keys, both PKCS#8
395 * encoded ones and old style PEM ones (with the key type is encoded into
396 * the PEM name).
397 */
398 int pem_check_suffix(const char *pem_str, const char *suffix);
399 static OSSL_STORE_INFO *try_decode_PrivateKey(const char *pem_name,
400 const char *pem_header,
401 const unsigned char *blob,
402 size_t len, void **pctx,
403 int *matchcount,
404 const UI_METHOD *ui_method,
405 void *ui_data)
406 {
407 OSSL_STORE_INFO *store_info = NULL;
408 EVP_PKEY *pkey = NULL;
409 const EVP_PKEY_ASN1_METHOD *ameth = NULL;
410
411 if (pem_name != NULL) {
412 if (strcmp(pem_name, PEM_STRING_PKCS8INF) == 0) {
413 PKCS8_PRIV_KEY_INFO *p8inf =
414 d2i_PKCS8_PRIV_KEY_INFO(NULL, &blob, len);
415
416 *matchcount = 1;
417 if (p8inf != NULL)
418 pkey = EVP_PKCS82PKEY(p8inf);
419 PKCS8_PRIV_KEY_INFO_free(p8inf);
420 } else {
421 int slen;
422
423 if ((slen = pem_check_suffix(pem_name, "PRIVATE KEY")) > 0
424 && (ameth = EVP_PKEY_asn1_find_str(NULL, pem_name,
425 slen)) != NULL) {
426 *matchcount = 1;
427 pkey = d2i_PrivateKey(ameth->pkey_id, NULL, &blob, len);
428 }
429 }
430 } else {
431 int i;
432
433 for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
434 EVP_PKEY *tmp_pkey = NULL;
435 const unsigned char *tmp_blob = blob;
436
437 ameth = EVP_PKEY_asn1_get0(i);
438 if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
439 continue;
440
441 tmp_pkey = d2i_PrivateKey(ameth->pkey_id, NULL, &tmp_blob, len);
442 if (tmp_pkey != NULL) {
443 if (pkey != NULL)
444 EVP_PKEY_free(tmp_pkey);
445 else
446 pkey = tmp_pkey;
447 (*matchcount)++;
448 }
449 }
450
451 if (*matchcount > 1) {
452 EVP_PKEY_free(pkey);
453 pkey = NULL;
454 }
455 }
456 if (pkey == NULL)
457 /* No match */
458 return NULL;
459
460 store_info = OSSL_STORE_INFO_new_PKEY(pkey);
461 if (store_info == NULL)
462 EVP_PKEY_free(pkey);
463
464 return store_info;
465 }
466
467 static FILE_HANDLER PrivateKey_handler = {
468 "PrivateKey",
469 try_decode_PrivateKey
470 };
471
472 /*
473 * Public key decoder. Only supports SubjectPublicKeyInfo formatted keys.
474 */
475 static OSSL_STORE_INFO *try_decode_PUBKEY(const char *pem_name,
476 const char *pem_header,
477 const unsigned char *blob,
478 size_t len, void **pctx,
479 int *matchcount,
480 const UI_METHOD *ui_method,
481 void *ui_data)
482 {
483 OSSL_STORE_INFO *store_info = NULL;
484 EVP_PKEY *pkey = NULL;
485
486 if (pem_name != NULL) {
487 if (strcmp(pem_name, PEM_STRING_PUBLIC) != 0)
488 /* No match */
489 return NULL;
490 *matchcount = 1;
491 }
492
493 if ((pkey = d2i_PUBKEY(NULL, &blob, len)) != NULL) {
494 *matchcount = 1;
495 store_info = OSSL_STORE_INFO_new_PKEY(pkey);
496 }
497
498 return store_info;
499 }
500
501 static FILE_HANDLER PUBKEY_handler = {
502 "PUBKEY",
503 try_decode_PUBKEY
504 };
505
506 /*
507 * Key parameter decoder.
508 */
509 static OSSL_STORE_INFO *try_decode_params(const char *pem_name,
510 const char *pem_header,
511 const unsigned char *blob,
512 size_t len, void **pctx,
513 int *matchcount,
514 const UI_METHOD *ui_method,
515 void *ui_data)
516 {
517 OSSL_STORE_INFO *store_info = NULL;
518 int slen = 0;
519 EVP_PKEY *pkey = NULL;
520 const EVP_PKEY_ASN1_METHOD *ameth = NULL;
521 int ok = 0;
522
523 if (pem_name != NULL) {
524 if ((slen = pem_check_suffix(pem_name, "PARAMETERS")) == 0)
525 return NULL;
526 *matchcount = 1;
527 }
528
529 if (slen > 0) {
530 if ((pkey = EVP_PKEY_new()) == NULL) {
531 OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PARAMS, ERR_R_EVP_LIB);
532 return NULL;
533 }
534
535
536 if (EVP_PKEY_set_type_str(pkey, pem_name, slen)
537 && (ameth = EVP_PKEY_get0_asn1(pkey)) != NULL
538 && ameth->param_decode != NULL
539 && ameth->param_decode(pkey, &blob, len))
540 ok = 1;
541 } else {
542 int i;
543 EVP_PKEY *tmp_pkey = NULL;
544
545 for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
546 const unsigned char *tmp_blob = blob;
547
548 if (tmp_pkey == NULL && (tmp_pkey = EVP_PKEY_new()) == NULL) {
549 OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PARAMS, ERR_R_EVP_LIB);
550 break;
551 }
552
553 ameth = EVP_PKEY_asn1_get0(i);
554 if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
555 continue;
556
557 if (EVP_PKEY_set_type(tmp_pkey, ameth->pkey_id)
558 && (ameth = EVP_PKEY_get0_asn1(tmp_pkey)) != NULL
559 && ameth->param_decode != NULL
560 && ameth->param_decode(tmp_pkey, &tmp_blob, len)) {
561 if (pkey != NULL)
562 EVP_PKEY_free(tmp_pkey);
563 else
564 pkey = tmp_pkey;
565 tmp_pkey = NULL;
566 (*matchcount)++;
567 }
568 }
569
570 EVP_PKEY_free(tmp_pkey);
571 if (*matchcount == 1) {
572 ok = 1;
573 }
574 }
575
576 if (ok)
577 store_info = OSSL_STORE_INFO_new_PARAMS(pkey);
578 if (store_info == NULL)
579 EVP_PKEY_free(pkey);
580
581 return store_info;
582 }
583
584 static FILE_HANDLER params_handler = {
585 "params",
586 try_decode_params
587 };
588
589 /*
590 * X.509 certificate decoder.
591 */
592 static OSSL_STORE_INFO *try_decode_X509Certificate(const char *pem_name,
593 const char *pem_header,
594 const unsigned char *blob,
595 size_t len, void **pctx,
596 int *matchcount,
597 const UI_METHOD *ui_method,
598 void *ui_data)
599 {
600 OSSL_STORE_INFO *store_info = NULL;
601 X509 *cert = NULL;
602
603 /*
604 * In most cases, we can try to interpret the serialized data as a trusted
605 * cert (X509 + X509_AUX) and fall back to reading it as a normal cert
606 * (just X509), but if the PEM name specifically declares it as a trusted
607 * cert, then no fallback should be engaged. |ignore_trusted| tells if
608 * the fallback can be used (1) or not (0).
609 */
610 int ignore_trusted = 1;
611
612 if (pem_name != NULL) {
613 if (strcmp(pem_name, PEM_STRING_X509_TRUSTED) == 0)
614 ignore_trusted = 0;
615 else if (strcmp(pem_name, PEM_STRING_X509_OLD) != 0
616 && strcmp(pem_name, PEM_STRING_X509) != 0)
617 /* No match */
618 return NULL;
619 *matchcount = 1;
620 }
621
622 if ((cert = d2i_X509_AUX(NULL, &blob, len)) != NULL
623 || (ignore_trusted && (cert = d2i_X509(NULL, &blob, len)) != NULL)) {
624 *matchcount = 1;
625 store_info = OSSL_STORE_INFO_new_CERT(cert);
626 }
627
628 if (store_info == NULL)
629 X509_free(cert);
630
631 return store_info;
632 }
633
634 static FILE_HANDLER X509Certificate_handler = {
635 "X509Certificate",
636 try_decode_X509Certificate
637 };
638
639 /*
640 * X.509 CRL decoder.
641 */
642 static OSSL_STORE_INFO *try_decode_X509CRL(const char *pem_name,
643 const char *pem_header,
644 const unsigned char *blob,
645 size_t len, void **pctx,
646 int *matchcount,
647 const UI_METHOD *ui_method,
648 void *ui_data)
649 {
650 OSSL_STORE_INFO *store_info = NULL;
651 X509_CRL *crl = NULL;
652
653 if (pem_name != NULL) {
654 if (strcmp(pem_name, PEM_STRING_X509_CRL) != 0)
655 /* No match */
656 return NULL;
657 *matchcount = 1;
658 }
659
660 if ((crl = d2i_X509_CRL(NULL, &blob, len)) != NULL) {
661 *matchcount = 1;
662 store_info = OSSL_STORE_INFO_new_CRL(crl);
663 }
664
665 if (store_info == NULL)
666 X509_CRL_free(crl);
667
668 return store_info;
669 }
670
671 static FILE_HANDLER X509CRL_handler = {
672 "X509CRL",
673 try_decode_X509CRL
674 };
675
676 /*
677 * To finish it all off, we collect all the handlers.
678 */
679 static const FILE_HANDLER *file_handlers[] = {
680 &PKCS12_handler,
681 &PKCS8Encrypted_handler,
682 &X509Certificate_handler,
683 &X509CRL_handler,
684 &params_handler,
685 &PUBKEY_handler,
686 &PrivateKey_handler,
687 };
688
689
690 /*-
691 * The loader itself
692 * -----------------
693 */
694
695 struct ossl_store_loader_ctx_st {
696 enum {
697 is_raw = 0,
698 is_pem,
699 is_dir
700 } type;
701 int errcnt;
702 #define FILE_FLAG_SECMEM (1<<0)
703 unsigned int flags;
704 union {
705 struct { /* Used with is_raw and is_pem */
706 BIO *file;
707
708 /*
709 * The following are used when the handler is marked as
710 * repeatable
711 */
712 const FILE_HANDLER *last_handler;
713 void *last_handler_ctx;
714 } file;
715 struct { /* Used with is_dir */
716 OPENSSL_DIR_CTX *ctx;
717 int end_reached;
718 char *uri;
719
720 /*
721 * When a search expression is given, these are filled in.
722 * |search_name| contains the file basename to look for.
723 * The string is exactly 8 characters long.
724 */
725 char search_name[9];
726
727 /*
728 * The directory reading utility we have combines opening with
729 * reading the first name. To make sure we can detect the end
730 * at the right time, we read early and cache the name.
731 */
732 const char *last_entry;
733 int last_errno;
734 } dir;
735 } _;
736
737 /* Expected object type. May be unspecified */
738 int expected_type;
739 };
740
741 static void OSSL_STORE_LOADER_CTX_free(OSSL_STORE_LOADER_CTX *ctx)
742 {
743 if (ctx->type == is_dir) {
744 OPENSSL_free(ctx->_.dir.uri);
745 } else {
746 if (ctx->_.file.last_handler != NULL) {
747 ctx->_.file.last_handler->destroy_ctx(&ctx->_.file.last_handler_ctx);
748 ctx->_.file.last_handler_ctx = NULL;
749 ctx->_.file.last_handler = NULL;
750 }
751 }
752 OPENSSL_free(ctx);
753 }
754
755 static OSSL_STORE_LOADER_CTX *file_open(const OSSL_STORE_LOADER *loader,
756 const char *uri,
757 const UI_METHOD *ui_method,
758 void *ui_data)
759 {
760 OSSL_STORE_LOADER_CTX *ctx = NULL;
761 struct stat st;
762 struct {
763 const char *path;
764 unsigned int check_absolute:1;
765 } path_data[2];
766 size_t path_data_n = 0, i;
767 const char *path;
768
769 /*
770 * First step, just take the URI as is.
771 */
772 path_data[path_data_n].check_absolute = 0;
773 path_data[path_data_n++].path = uri;
774
775 /*
776 * Second step, if the URI appears to start with the 'file' scheme,
777 * extract the path and make that the second path to check.
778 * There's a special case if the URI also contains an authority, then
779 * the full URI shouldn't be used as a path anywhere.
780 */
781 if (strncasecmp(uri, "file:", 5) == 0) {
782 const char *p = &uri[5];
783
784 if (strncmp(&uri[5], "//", 2) == 0) {
785 path_data_n--; /* Invalidate using the full URI */
786 if (strncasecmp(&uri[7], "localhost/", 10) == 0) {
787 p = &uri[16];
788 } else if (uri[7] == '/') {
789 p = &uri[7];
790 } else {
791 OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN,
792 OSSL_STORE_R_URI_AUTHORITY_UNSUPPORTED);
793 return NULL;
794 }
795 }
796
797 path_data[path_data_n].check_absolute = 1;
798 #ifdef _WIN32
799 /* Windows file: URIs with a drive letter start with a / */
800 if (p[0] == '/' && p[2] == ':' && p[3] == '/') {
801 char c = ossl_tolower(p[1]);
802
803 if (c >= 'a' && c <= 'z') {
804 p++;
805 /* We know it's absolute, so no need to check */
806 path_data[path_data_n].check_absolute = 0;
807 }
808 }
809 #endif
810 path_data[path_data_n++].path = p;
811 }
812
813
814 for (i = 0, path = NULL; path == NULL && i < path_data_n; i++) {
815 /*
816 * If the scheme "file" was an explicit part of the URI, the path must
817 * be absolute. So says RFC 8089
818 */
819 if (path_data[i].check_absolute && path_data[i].path[0] != '/') {
820 OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN,
821 OSSL_STORE_R_PATH_MUST_BE_ABSOLUTE);
822 ERR_add_error_data(1, path_data[i].path);
823 return NULL;
824 }
825
826 if (stat(path_data[i].path, &st) < 0) {
827 ERR_raise_data(ERR_LIB_SYS, errno,
828 "calling stat(%s)",
829 path_data[i].path);
830 } else {
831 path = path_data[i].path;
832 }
833 }
834 if (path == NULL) {
835 return NULL;
836 }
837
838 /* Successfully found a working path, clear possible collected errors */
839 ERR_clear_error();
840
841 ctx = OPENSSL_zalloc(sizeof(*ctx));
842 if (ctx == NULL) {
843 OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN, ERR_R_MALLOC_FAILURE);
844 return NULL;
845 }
846
847 if (S_ISDIR(st.st_mode)) {
848 /*
849 * Try to copy everything, even if we know that some of them must be
850 * NULL for the moment. This prevents errors in the future, when more
851 * components may be used.
852 */
853 ctx->_.dir.uri = OPENSSL_strdup(uri);
854 ctx->type = is_dir;
855
856 if (ctx->_.dir.uri == NULL)
857 goto err;
858
859 ctx->_.dir.last_entry = OPENSSL_DIR_read(&ctx->_.dir.ctx, path);
860 ctx->_.dir.last_errno = errno;
861 if (ctx->_.dir.last_entry == NULL) {
862 if (ctx->_.dir.last_errno != 0) {
863 char errbuf[256];
864 OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN, ERR_R_SYS_LIB);
865 errno = ctx->_.dir.last_errno;
866 if (openssl_strerror_r(errno, errbuf, sizeof(errbuf)))
867 ERR_add_error_data(1, errbuf);
868 goto err;
869 }
870 ctx->_.dir.end_reached = 1;
871 }
872 } else {
873 BIO *buff = NULL;
874 char peekbuf[4096] = { 0, };
875
876 if ((buff = BIO_new(BIO_f_buffer())) == NULL
877 || (ctx->_.file.file = BIO_new_file(path, "rb")) == NULL) {
878 BIO_free_all(buff);
879 goto err;
880 }
881
882 ctx->_.file.file = BIO_push(buff, ctx->_.file.file);
883 if (BIO_buffer_peek(ctx->_.file.file, peekbuf, sizeof(peekbuf) - 1) > 0) {
884 peekbuf[sizeof(peekbuf) - 1] = '\0';
885 if (strstr(peekbuf, "-----BEGIN ") != NULL)
886 ctx->type = is_pem;
887 }
888 }
889
890 return ctx;
891 err:
892 OSSL_STORE_LOADER_CTX_free(ctx);
893 return NULL;
894 }
895
896 static int file_ctrl(OSSL_STORE_LOADER_CTX *ctx, int cmd, va_list args)
897 {
898 int ret = 1;
899
900 switch (cmd) {
901 case OSSL_STORE_C_USE_SECMEM:
902 {
903 int on = *(va_arg(args, int *));
904
905 switch (on) {
906 case 0:
907 ctx->flags &= ~FILE_FLAG_SECMEM;
908 break;
909 case 1:
910 ctx->flags |= FILE_FLAG_SECMEM;
911 break;
912 default:
913 OSSL_STOREerr(OSSL_STORE_F_FILE_CTRL,
914 ERR_R_PASSED_INVALID_ARGUMENT);
915 ret = 0;
916 break;
917 }
918 }
919 break;
920 default:
921 break;
922 }
923
924 return ret;
925 }
926
927 static int file_expect(OSSL_STORE_LOADER_CTX *ctx, int expected)
928 {
929 ctx->expected_type = expected;
930 return 1;
931 }
932
933 static int file_find(OSSL_STORE_LOADER_CTX *ctx, OSSL_STORE_SEARCH *search)
934 {
935 /*
936 * If ctx == NULL, the library is looking to know if this loader supports
937 * the given search type.
938 */
939
940 if (OSSL_STORE_SEARCH_get_type(search) == OSSL_STORE_SEARCH_BY_NAME) {
941 unsigned long hash = 0;
942
943 if (ctx == NULL)
944 return 1;
945
946 if (ctx->type != is_dir) {
947 OSSL_STOREerr(OSSL_STORE_F_FILE_FIND,
948 OSSL_STORE_R_SEARCH_ONLY_SUPPORTED_FOR_DIRECTORIES);
949 return 0;
950 }
951
952 hash = X509_NAME_hash(OSSL_STORE_SEARCH_get0_name(search));
953 BIO_snprintf(ctx->_.dir.search_name, sizeof(ctx->_.dir.search_name),
954 "%08lx", hash);
955 return 1;
956 }
957
958 if (ctx != NULL)
959 OSSL_STOREerr(OSSL_STORE_F_FILE_FIND,
960 OSSL_STORE_R_UNSUPPORTED_SEARCH_TYPE);
961 return 0;
962 }
963
964 /* Internal function to decode an already opened PEM file */
965 OSSL_STORE_LOADER_CTX *ossl_store_file_attach_pem_bio_int(BIO *bp)
966 {
967 OSSL_STORE_LOADER_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
968
969 if (ctx == NULL) {
970 OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_FILE_ATTACH_PEM_BIO_INT,
971 ERR_R_MALLOC_FAILURE);
972 return NULL;
973 }
974
975 ctx->_.file.file = bp;
976 ctx->type = is_pem;
977
978 return ctx;
979 }
980
981 static OSSL_STORE_INFO *file_load_try_decode(OSSL_STORE_LOADER_CTX *ctx,
982 const char *pem_name,
983 const char *pem_header,
984 unsigned char *data, size_t len,
985 const UI_METHOD *ui_method,
986 void *ui_data, int *matchcount)
987 {
988 OSSL_STORE_INFO *result = NULL;
989 BUF_MEM *new_mem = NULL;
990 char *new_pem_name = NULL;
991 int t = 0;
992
993 again:
994 {
995 size_t i = 0;
996 void *handler_ctx = NULL;
997 const FILE_HANDLER **matching_handlers =
998 OPENSSL_zalloc(sizeof(*matching_handlers)
999 * OSSL_NELEM(file_handlers));
1000
1001 if (matching_handlers == NULL) {
1002 OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD_TRY_DECODE,
1003 ERR_R_MALLOC_FAILURE);
1004 goto err;
1005 }
1006
1007 *matchcount = 0;
1008 for (i = 0; i < OSSL_NELEM(file_handlers); i++) {
1009 const FILE_HANDLER *handler = file_handlers[i];
1010 int try_matchcount = 0;
1011 void *tmp_handler_ctx = NULL;
1012 OSSL_STORE_INFO *tmp_result =
1013 handler->try_decode(pem_name, pem_header, data, len,
1014 &tmp_handler_ctx, &try_matchcount,
1015 ui_method, ui_data);
1016
1017 if (try_matchcount > 0) {
1018
1019 matching_handlers[*matchcount] = handler;
1020
1021 if (handler_ctx)
1022 handler->destroy_ctx(&handler_ctx);
1023 handler_ctx = tmp_handler_ctx;
1024
1025 if ((*matchcount += try_matchcount) > 1) {
1026 /* more than one match => ambiguous, kill any result */
1027 OSSL_STORE_INFO_free(result);
1028 OSSL_STORE_INFO_free(tmp_result);
1029 if (handler->destroy_ctx != NULL)
1030 handler->destroy_ctx(&handler_ctx);
1031 handler_ctx = NULL;
1032 tmp_result = NULL;
1033 result = NULL;
1034 }
1035 if (result == NULL)
1036 result = tmp_result;
1037 }
1038 }
1039
1040 if (*matchcount == 1 && matching_handlers[0]->repeatable) {
1041 ctx->_.file.last_handler = matching_handlers[0];
1042 ctx->_.file.last_handler_ctx = handler_ctx;
1043 }
1044
1045 OPENSSL_free(matching_handlers);
1046 }
1047
1048 err:
1049 OPENSSL_free(new_pem_name);
1050 BUF_MEM_free(new_mem);
1051
1052 if (result != NULL
1053 && (t = OSSL_STORE_INFO_get_type(result)) == OSSL_STORE_INFO_EMBEDDED) {
1054 pem_name = new_pem_name =
1055 ossl_store_info_get0_EMBEDDED_pem_name(result);
1056 new_mem = ossl_store_info_get0_EMBEDDED_buffer(result);
1057 data = (unsigned char *)new_mem->data;
1058 len = new_mem->length;
1059 OPENSSL_free(result);
1060 result = NULL;
1061 goto again;
1062 }
1063
1064 if (result != NULL)
1065 ERR_clear_error();
1066
1067 return result;
1068 }
1069
1070 static OSSL_STORE_INFO *file_load_try_repeat(OSSL_STORE_LOADER_CTX *ctx,
1071 const UI_METHOD *ui_method,
1072 void *ui_data)
1073 {
1074 OSSL_STORE_INFO *result = NULL;
1075 int try_matchcount = 0;
1076
1077 if (ctx->_.file.last_handler != NULL) {
1078 result =
1079 ctx->_.file.last_handler->try_decode(NULL, NULL, NULL, 0,
1080 &ctx->_.file.last_handler_ctx,
1081 &try_matchcount,
1082 ui_method, ui_data);
1083
1084 if (result == NULL) {
1085 ctx->_.file.last_handler->destroy_ctx(&ctx->_.file.last_handler_ctx);
1086 ctx->_.file.last_handler_ctx = NULL;
1087 ctx->_.file.last_handler = NULL;
1088 }
1089 }
1090 return result;
1091 }
1092
1093 static void pem_free_flag(void *pem_data, int secure, size_t num)
1094 {
1095 if (secure)
1096 OPENSSL_secure_clear_free(pem_data, num);
1097 else
1098 OPENSSL_free(pem_data);
1099 }
1100 static int file_read_pem(BIO *bp, char **pem_name, char **pem_header,
1101 unsigned char **data, long *len,
1102 const UI_METHOD *ui_method,
1103 void *ui_data, int secure)
1104 {
1105 int i = secure
1106 ? PEM_read_bio_ex(bp, pem_name, pem_header, data, len,
1107 PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE)
1108 : PEM_read_bio(bp, pem_name, pem_header, data, len);
1109
1110 if (i <= 0)
1111 return 0;
1112
1113 /*
1114 * 10 is the number of characters in "Proc-Type:", which
1115 * PEM_get_EVP_CIPHER_INFO() requires to be present.
1116 * If the PEM header has less characters than that, it's
1117 * not worth spending cycles on it.
1118 */
1119 if (strlen(*pem_header) > 10) {
1120 EVP_CIPHER_INFO cipher;
1121 struct pem_pass_data pass_data;
1122
1123 if (!PEM_get_EVP_CIPHER_INFO(*pem_header, &cipher)
1124 || !file_fill_pem_pass_data(&pass_data, "PEM", ui_method, ui_data)
1125 || !PEM_do_header(&cipher, *data, len, file_get_pem_pass,
1126 &pass_data)) {
1127 return 0;
1128 }
1129 }
1130 return 1;
1131 }
1132
1133 static int file_read_asn1(BIO *bp, unsigned char **data, long *len)
1134 {
1135 BUF_MEM *mem = NULL;
1136
1137 if (asn1_d2i_read_bio(bp, &mem) < 0)
1138 return 0;
1139
1140 *data = (unsigned char *)mem->data;
1141 *len = (long)mem->length;
1142 OPENSSL_free(mem);
1143
1144 return 1;
1145 }
1146
1147 static int ends_with_dirsep(const char *uri)
1148 {
1149 if (*uri != '\0')
1150 uri += strlen(uri) - 1;
1151 #if defined __VMS
1152 if (*uri == ']' || *uri == '>' || *uri == ':')
1153 return 1;
1154 #elif defined _WIN32
1155 if (*uri == '\\')
1156 return 1;
1157 #endif
1158 return *uri == '/';
1159 }
1160
1161 static int file_name_to_uri(OSSL_STORE_LOADER_CTX *ctx, const char *name,
1162 char **data)
1163 {
1164 assert(name != NULL);
1165 assert(data != NULL);
1166 {
1167 const char *pathsep = ends_with_dirsep(ctx->_.dir.uri) ? "" : "/";
1168 long calculated_length = strlen(ctx->_.dir.uri) + strlen(pathsep)
1169 + strlen(name) + 1 /* \0 */;
1170
1171 *data = OPENSSL_zalloc(calculated_length);
1172 if (*data == NULL) {
1173 OSSL_STOREerr(OSSL_STORE_F_FILE_NAME_TO_URI, ERR_R_MALLOC_FAILURE);
1174 return 0;
1175 }
1176
1177 OPENSSL_strlcat(*data, ctx->_.dir.uri, calculated_length);
1178 OPENSSL_strlcat(*data, pathsep, calculated_length);
1179 OPENSSL_strlcat(*data, name, calculated_length);
1180 }
1181 return 1;
1182 }
1183
1184 static int file_name_check(OSSL_STORE_LOADER_CTX *ctx, const char *name)
1185 {
1186 const char *p = NULL;
1187
1188 /* If there are no search criteria, all names are accepted */
1189 if (ctx->_.dir.search_name[0] == '\0')
1190 return 1;
1191
1192 /* If the expected type isn't supported, no name is accepted */
1193 if (ctx->expected_type != 0
1194 && ctx->expected_type != OSSL_STORE_INFO_CERT
1195 && ctx->expected_type != OSSL_STORE_INFO_CRL)
1196 return 0;
1197
1198 /*
1199 * First, check the basename
1200 */
1201 if (strncasecmp(name, ctx->_.dir.search_name,
1202 sizeof(ctx->_.dir.search_name) - 1) != 0
1203 || name[sizeof(ctx->_.dir.search_name) - 1] != '.')
1204 return 0;
1205 p = &name[sizeof(ctx->_.dir.search_name)];
1206
1207 /*
1208 * Then, if the expected type is a CRL, check that the extension starts
1209 * with 'r'
1210 */
1211 if (*p == 'r') {
1212 p++;
1213 if (ctx->expected_type != 0
1214 && ctx->expected_type != OSSL_STORE_INFO_CRL)
1215 return 0;
1216 } else if (ctx->expected_type == OSSL_STORE_INFO_CRL) {
1217 return 0;
1218 }
1219
1220 /*
1221 * Last, check that the rest of the extension is a decimal number, at
1222 * least one digit long.
1223 */
1224 if (!ossl_isdigit(*p))
1225 return 0;
1226 while (ossl_isdigit(*p))
1227 p++;
1228
1229 # ifdef __VMS
1230 /*
1231 * One extra step here, check for a possible generation number.
1232 */
1233 if (*p == ';')
1234 for (p++; *p != '\0'; p++)
1235 if (!ossl_isdigit(*p))
1236 break;
1237 # endif
1238
1239 /*
1240 * If we've reached the end of the string at this point, we've successfully
1241 * found a fitting file name.
1242 */
1243 return *p == '\0';
1244 }
1245
1246 static int file_eof(OSSL_STORE_LOADER_CTX *ctx);
1247 static int file_error(OSSL_STORE_LOADER_CTX *ctx);
1248 static OSSL_STORE_INFO *file_load(OSSL_STORE_LOADER_CTX *ctx,
1249 const UI_METHOD *ui_method, void *ui_data)
1250 {
1251 OSSL_STORE_INFO *result = NULL;
1252
1253 ctx->errcnt = 0;
1254 ERR_clear_error();
1255
1256 if (ctx->type == is_dir) {
1257 do {
1258 char *newname = NULL;
1259
1260 if (ctx->_.dir.last_entry == NULL) {
1261 if (!ctx->_.dir.end_reached) {
1262 char errbuf[256];
1263 assert(ctx->_.dir.last_errno != 0);
1264 OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD, ERR_R_SYS_LIB);
1265 errno = ctx->_.dir.last_errno;
1266 ctx->errcnt++;
1267 if (openssl_strerror_r(errno, errbuf, sizeof(errbuf)))
1268 ERR_add_error_data(1, errbuf);
1269 }
1270 return NULL;
1271 }
1272
1273 if (ctx->_.dir.last_entry[0] != '.'
1274 && file_name_check(ctx, ctx->_.dir.last_entry)
1275 && !file_name_to_uri(ctx, ctx->_.dir.last_entry, &newname))
1276 return NULL;
1277
1278 /*
1279 * On the first call (with a NULL context), OPENSSL_DIR_read()
1280 * cares about the second argument. On the following calls, it
1281 * only cares that it isn't NULL. Therefore, we can safely give
1282 * it our URI here.
1283 */
1284 ctx->_.dir.last_entry = OPENSSL_DIR_read(&ctx->_.dir.ctx,
1285 ctx->_.dir.uri);
1286 ctx->_.dir.last_errno = errno;
1287 if (ctx->_.dir.last_entry == NULL && ctx->_.dir.last_errno == 0)
1288 ctx->_.dir.end_reached = 1;
1289
1290 if (newname != NULL
1291 && (result = OSSL_STORE_INFO_new_NAME(newname)) == NULL) {
1292 OPENSSL_free(newname);
1293 OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD, ERR_R_OSSL_STORE_LIB);
1294 return NULL;
1295 }
1296 } while (result == NULL && !file_eof(ctx));
1297 } else {
1298 int matchcount = -1;
1299
1300 again:
1301 result = file_load_try_repeat(ctx, ui_method, ui_data);
1302 if (result != NULL)
1303 return result;
1304
1305 if (file_eof(ctx))
1306 return NULL;
1307
1308 do {
1309 char *pem_name = NULL; /* PEM record name */
1310 char *pem_header = NULL; /* PEM record header */
1311 unsigned char *data = NULL; /* DER encoded data */
1312 long len = 0; /* DER encoded data length */
1313
1314 matchcount = -1;
1315 if (ctx->type == is_pem) {
1316 if (!file_read_pem(ctx->_.file.file, &pem_name, &pem_header,
1317 &data, &len, ui_method, ui_data,
1318 (ctx->flags & FILE_FLAG_SECMEM) != 0)) {
1319 ctx->errcnt++;
1320 goto endloop;
1321 }
1322 } else {
1323 if (!file_read_asn1(ctx->_.file.file, &data, &len)) {
1324 ctx->errcnt++;
1325 goto endloop;
1326 }
1327 }
1328
1329 result = file_load_try_decode(ctx, pem_name, pem_header, data, len,
1330 ui_method, ui_data, &matchcount);
1331
1332 if (result != NULL)
1333 goto endloop;
1334
1335 /*
1336 * If a PEM name matches more than one handler, the handlers are
1337 * badly coded.
1338 */
1339 if (!ossl_assert(pem_name == NULL || matchcount <= 1)) {
1340 ctx->errcnt++;
1341 goto endloop;
1342 }
1343
1344 if (matchcount > 1) {
1345 OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD,
1346 OSSL_STORE_R_AMBIGUOUS_CONTENT_TYPE);
1347 } else if (matchcount == 1) {
1348 /*
1349 * If there are other errors on the stack, they already show
1350 * what the problem is.
1351 */
1352 if (ERR_peek_error() == 0) {
1353 OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD,
1354 OSSL_STORE_R_UNSUPPORTED_CONTENT_TYPE);
1355 if (pem_name != NULL)
1356 ERR_add_error_data(3, "PEM type is '", pem_name, "'");
1357 }
1358 }
1359 if (matchcount > 0)
1360 ctx->errcnt++;
1361
1362 endloop:
1363 pem_free_flag(pem_name, (ctx->flags & FILE_FLAG_SECMEM) != 0, 0);
1364 pem_free_flag(pem_header, (ctx->flags & FILE_FLAG_SECMEM) != 0, 0);
1365 pem_free_flag(data, (ctx->flags & FILE_FLAG_SECMEM) != 0, len);
1366 } while (matchcount == 0 && !file_eof(ctx) && !file_error(ctx));
1367
1368 /* We bail out on ambiguity */
1369 if (matchcount > 1)
1370 return NULL;
1371
1372 if (result != NULL
1373 && ctx->expected_type != 0
1374 && ctx->expected_type != OSSL_STORE_INFO_get_type(result)) {
1375 OSSL_STORE_INFO_free(result);
1376 goto again;
1377 }
1378 }
1379
1380 return result;
1381 }
1382
1383 static int file_error(OSSL_STORE_LOADER_CTX *ctx)
1384 {
1385 return ctx->errcnt > 0;
1386 }
1387
1388 static int file_eof(OSSL_STORE_LOADER_CTX *ctx)
1389 {
1390 if (ctx->type == is_dir)
1391 return ctx->_.dir.end_reached;
1392
1393 if (ctx->_.file.last_handler != NULL
1394 && !ctx->_.file.last_handler->eof(ctx->_.file.last_handler_ctx))
1395 return 0;
1396 return BIO_eof(ctx->_.file.file);
1397 }
1398
1399 static int file_close(OSSL_STORE_LOADER_CTX *ctx)
1400 {
1401 if (ctx->type == is_dir) {
1402 OPENSSL_DIR_end(&ctx->_.dir.ctx);
1403 } else {
1404 BIO_free_all(ctx->_.file.file);
1405 }
1406 OSSL_STORE_LOADER_CTX_free(ctx);
1407 return 1;
1408 }
1409
1410 int ossl_store_file_detach_pem_bio_int(OSSL_STORE_LOADER_CTX *ctx)
1411 {
1412 OSSL_STORE_LOADER_CTX_free(ctx);
1413 return 1;
1414 }
1415
1416 static OSSL_STORE_LOADER file_loader =
1417 {
1418 "file",
1419 NULL,
1420 file_open,
1421 file_ctrl,
1422 file_expect,
1423 file_find,
1424 file_load,
1425 file_eof,
1426 file_error,
1427 file_close
1428 };
1429
1430 static void store_file_loader_deinit(void)
1431 {
1432 ossl_store_unregister_loader_int(file_loader.scheme);
1433 }
1434
1435 int ossl_store_file_loader_init(void)
1436 {
1437 int ret = ossl_store_register_loader_int(&file_loader);
1438
1439 OPENSSL_atexit(store_file_loader_deinit);
1440 return ret;
1441 }
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