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source: vbox/trunk/src/libs/openssl-1.1.1j/crypto/store/loader_file.c@ 88461

Last change on this file since 88461 was 87984, checked in by vboxsync, 4 years ago

openssl-1.1.1j: Applied and adjusted our OpenSSL changes to 1.1.1j. bugref:9963
File size: 45.7 KB
Line 
1/*
2 * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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 "crypto/asn1.h"
28#include "crypto/ctype.h"
29#include "internal/o_dir.h"
30#include "internal/cryptlib.h"
31#include "crypto/store.h"
32#include "store_local.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
47static 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
91struct pem_pass_data {
92 const UI_METHOD *ui_method;
93 void *data;
94 const char *prompt_info;
95};
96
97static 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 */
110static 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 */
160typedef 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 */
172typedef 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 */
178typedef void (*file_destroy_ctx_fn)(void **handler_ctx);
179
180typedef 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 */
195static 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
295static 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
302static 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
310static 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 */
323static 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
388static 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 */
398int pem_check_suffix(const char *pem_str, const char *suffix);
399static 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#ifndef OPENSSL_NO_ENGINE
433 ENGINE *curengine = ENGINE_get_first();
434
435 while (curengine != NULL) {
436 ENGINE_PKEY_ASN1_METHS_PTR asn1meths =
437 ENGINE_get_pkey_asn1_meths(curengine);
438
439 if (asn1meths != NULL) {
440 const int *nids = NULL;
441 int nids_n = asn1meths(curengine, NULL, &nids, 0);
442
443 for (i = 0; i < nids_n; i++) {
444 EVP_PKEY_ASN1_METHOD *ameth2 = NULL;
445 EVP_PKEY *tmp_pkey = NULL;
446 const unsigned char *tmp_blob = blob;
447
448 if (!asn1meths(curengine, &ameth2, NULL, nids[i]))
449 continue;
450 if (ameth2 == NULL
451 || ameth2->pkey_flags & ASN1_PKEY_ALIAS)
452 continue;
453
454 tmp_pkey = d2i_PrivateKey(ameth2->pkey_id, NULL,
455 &tmp_blob, len);
456 if (tmp_pkey != NULL) {
457 if (pkey != NULL)
458 EVP_PKEY_free(tmp_pkey);
459 else
460 pkey = tmp_pkey;
461 (*matchcount)++;
462 }
463 }
464 }
465 curengine = ENGINE_get_next(curengine);
466 }
467#endif
468
469 for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
470 EVP_PKEY *tmp_pkey = NULL;
471 const unsigned char *tmp_blob = blob;
472
473 ameth = EVP_PKEY_asn1_get0(i);
474 if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
475 continue;
476
477 tmp_pkey = d2i_PrivateKey(ameth->pkey_id, NULL, &tmp_blob, len);
478 if (tmp_pkey != NULL) {
479 if (pkey != NULL)
480 EVP_PKEY_free(tmp_pkey);
481 else
482 pkey = tmp_pkey;
483 (*matchcount)++;
484 }
485 }
486
487 if (*matchcount > 1) {
488 EVP_PKEY_free(pkey);
489 pkey = NULL;
490 }
491 }
492 if (pkey == NULL)
493 /* No match */
494 return NULL;
495
496 store_info = OSSL_STORE_INFO_new_PKEY(pkey);
497 if (store_info == NULL)
498 EVP_PKEY_free(pkey);
499
500 return store_info;
501}
502
503static FILE_HANDLER PrivateKey_handler = {
504 "PrivateKey",
505 try_decode_PrivateKey
506};
507
508/*
509 * Public key decoder. Only supports SubjectPublicKeyInfo formatted keys.
510 */
511static OSSL_STORE_INFO *try_decode_PUBKEY(const char *pem_name,
512 const char *pem_header,
513 const unsigned char *blob,
514 size_t len, void **pctx,
515 int *matchcount,
516 const UI_METHOD *ui_method,
517 void *ui_data)
518{
519 OSSL_STORE_INFO *store_info = NULL;
520 EVP_PKEY *pkey = NULL;
521
522 if (pem_name != NULL) {
523 if (strcmp(pem_name, PEM_STRING_PUBLIC) != 0)
524 /* No match */
525 return NULL;
526 *matchcount = 1;
527 }
528
529 if ((pkey = d2i_PUBKEY(NULL, &blob, len)) != NULL) {
530 *matchcount = 1;
531 store_info = OSSL_STORE_INFO_new_PKEY(pkey);
532 }
533
534 return store_info;
535}
536
537static FILE_HANDLER PUBKEY_handler = {
538 "PUBKEY",
539 try_decode_PUBKEY
540};
541
542/*
543 * Key parameter decoder.
544 */
545static OSSL_STORE_INFO *try_decode_params(const char *pem_name,
546 const char *pem_header,
547 const unsigned char *blob,
548 size_t len, void **pctx,
549 int *matchcount,
550 const UI_METHOD *ui_method,
551 void *ui_data)
552{
553 OSSL_STORE_INFO *store_info = NULL;
554 int slen = 0;
555 EVP_PKEY *pkey = NULL;
556 const EVP_PKEY_ASN1_METHOD *ameth = NULL;
557 int ok = 0;
558
559 if (pem_name != NULL) {
560 if ((slen = pem_check_suffix(pem_name, "PARAMETERS")) == 0)
561 return NULL;
562 *matchcount = 1;
563 }
564
565 if (slen > 0) {
566 if ((pkey = EVP_PKEY_new()) == NULL) {
567 OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PARAMS, ERR_R_EVP_LIB);
568 return NULL;
569 }
570
571
572 if (EVP_PKEY_set_type_str(pkey, pem_name, slen)
573 && (ameth = EVP_PKEY_get0_asn1(pkey)) != NULL
574 && ameth->param_decode != NULL
575 && ameth->param_decode(pkey, &blob, len))
576 ok = 1;
577 } else {
578 int i;
579 EVP_PKEY *tmp_pkey = NULL;
580
581 for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
582 const unsigned char *tmp_blob = blob;
583
584 if (tmp_pkey == NULL && (tmp_pkey = EVP_PKEY_new()) == NULL) {
585 OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PARAMS, ERR_R_EVP_LIB);
586 break;
587 }
588
589 ameth = EVP_PKEY_asn1_get0(i);
590 if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
591 continue;
592
593 if (EVP_PKEY_set_type(tmp_pkey, ameth->pkey_id)
594 && (ameth = EVP_PKEY_get0_asn1(tmp_pkey)) != NULL
595 && ameth->param_decode != NULL
596 && ameth->param_decode(tmp_pkey, &tmp_blob, len)) {
597 if (pkey != NULL)
598 EVP_PKEY_free(tmp_pkey);
599 else
600 pkey = tmp_pkey;
601 tmp_pkey = NULL;
602 (*matchcount)++;
603 }
604 }
605
606 EVP_PKEY_free(tmp_pkey);
607 if (*matchcount == 1) {
608 ok = 1;
609 }
610 }
611
612 if (ok)
613 store_info = OSSL_STORE_INFO_new_PARAMS(pkey);
614 if (store_info == NULL)
615 EVP_PKEY_free(pkey);
616
617 return store_info;
618}
619
620static FILE_HANDLER params_handler = {
621 "params",
622 try_decode_params
623};
624
625/*
626 * X.509 certificate decoder.
627 */
628static OSSL_STORE_INFO *try_decode_X509Certificate(const char *pem_name,
629 const char *pem_header,
630 const unsigned char *blob,
631 size_t len, void **pctx,
632 int *matchcount,
633 const UI_METHOD *ui_method,
634 void *ui_data)
635{
636 OSSL_STORE_INFO *store_info = NULL;
637 X509 *cert = NULL;
638
639 /*
640 * In most cases, we can try to interpret the serialized data as a trusted
641 * cert (X509 + X509_AUX) and fall back to reading it as a normal cert
642 * (just X509), but if the PEM name specifically declares it as a trusted
643 * cert, then no fallback should be engaged. |ignore_trusted| tells if
644 * the fallback can be used (1) or not (0).
645 */
646 int ignore_trusted = 1;
647
648 if (pem_name != NULL) {
649 if (strcmp(pem_name, PEM_STRING_X509_TRUSTED) == 0)
650 ignore_trusted = 0;
651 else if (strcmp(pem_name, PEM_STRING_X509_OLD) != 0
652 && strcmp(pem_name, PEM_STRING_X509) != 0)
653 /* No match */
654 return NULL;
655 *matchcount = 1;
656 }
657
658 if ((cert = d2i_X509_AUX(NULL, &blob, len)) != NULL
659 || (ignore_trusted && (cert = d2i_X509(NULL, &blob, len)) != NULL)) {
660 *matchcount = 1;
661 store_info = OSSL_STORE_INFO_new_CERT(cert);
662 }
663
664 if (store_info == NULL)
665 X509_free(cert);
666
667 return store_info;
668}
669
670static FILE_HANDLER X509Certificate_handler = {
671 "X509Certificate",
672 try_decode_X509Certificate
673};
674
675/*
676 * X.509 CRL decoder.
677 */
678static OSSL_STORE_INFO *try_decode_X509CRL(const char *pem_name,
679 const char *pem_header,
680 const unsigned char *blob,
681 size_t len, void **pctx,
682 int *matchcount,
683 const UI_METHOD *ui_method,
684 void *ui_data)
685{
686 OSSL_STORE_INFO *store_info = NULL;
687 X509_CRL *crl = NULL;
688
689 if (pem_name != NULL) {
690 if (strcmp(pem_name, PEM_STRING_X509_CRL) != 0)
691 /* No match */
692 return NULL;
693 *matchcount = 1;
694 }
695
696 if ((crl = d2i_X509_CRL(NULL, &blob, len)) != NULL) {
697 *matchcount = 1;
698 store_info = OSSL_STORE_INFO_new_CRL(crl);
699 }
700
701 if (store_info == NULL)
702 X509_CRL_free(crl);
703
704 return store_info;
705}
706
707static FILE_HANDLER X509CRL_handler = {
708 "X509CRL",
709 try_decode_X509CRL
710};
711
712/*
713 * To finish it all off, we collect all the handlers.
714 */
715static const FILE_HANDLER *file_handlers[] = {
716 &PKCS12_handler,
717 &PKCS8Encrypted_handler,
718 &X509Certificate_handler,
719 &X509CRL_handler,
720 &params_handler,
721 &PUBKEY_handler,
722 &PrivateKey_handler,
723};
724
725
726/*-
727 * The loader itself
728 * -----------------
729 */
730
731struct ossl_store_loader_ctx_st {
732 enum {
733 is_raw = 0,
734 is_pem,
735 is_dir
736 } type;
737 int errcnt;
738#define FILE_FLAG_SECMEM (1<<0)
739 unsigned int flags;
740 union {
741 struct { /* Used with is_raw and is_pem */
742 BIO *file;
743
744 /*
745 * The following are used when the handler is marked as
746 * repeatable
747 */
748 const FILE_HANDLER *last_handler;
749 void *last_handler_ctx;
750 } file;
751 struct { /* Used with is_dir */
752 OPENSSL_DIR_CTX *ctx;
753 int end_reached;
754 char *uri;
755
756 /*
757 * When a search expression is given, these are filled in.
758 * |search_name| contains the file basename to look for.
759 * The string is exactly 8 characters long.
760 */
761 char search_name[9];
762
763 /*
764 * The directory reading utility we have combines opening with
765 * reading the first name. To make sure we can detect the end
766 * at the right time, we read early and cache the name.
767 */
768 const char *last_entry;
769 int last_errno;
770 } dir;
771 } _;
772
773 /* Expected object type. May be unspecified */
774 int expected_type;
775};
776
777static void OSSL_STORE_LOADER_CTX_free(OSSL_STORE_LOADER_CTX *ctx)
778{
779 if (ctx->type == is_dir) {
780 OPENSSL_free(ctx->_.dir.uri);
781 } else {
782 if (ctx->_.file.last_handler != NULL) {
783 ctx->_.file.last_handler->destroy_ctx(&ctx->_.file.last_handler_ctx);
784 ctx->_.file.last_handler_ctx = NULL;
785 ctx->_.file.last_handler = NULL;
786 }
787 }
788 OPENSSL_free(ctx);
789}
790
791static OSSL_STORE_LOADER_CTX *file_open(const OSSL_STORE_LOADER *loader,
792 const char *uri,
793 const UI_METHOD *ui_method,
794 void *ui_data)
795{
796 OSSL_STORE_LOADER_CTX *ctx = NULL;
797 struct stat st;
798 struct {
799 const char *path;
800 unsigned int check_absolute:1;
801 } path_data[2];
802 size_t path_data_n = 0, i;
803 const char *path;
804
805 /*
806 * First step, just take the URI as is.
807 */
808 path_data[path_data_n].check_absolute = 0;
809 path_data[path_data_n++].path = uri;
810
811 /*
812 * Second step, if the URI appears to start with the 'file' scheme,
813 * extract the path and make that the second path to check.
814 * There's a special case if the URI also contains an authority, then
815 * the full URI shouldn't be used as a path anywhere.
816 */
817 if (strncasecmp(uri, "file:", 5) == 0) {
818 const char *p = &uri[5];
819
820 if (strncmp(&uri[5], "//", 2) == 0) {
821 path_data_n--; /* Invalidate using the full URI */
822 if (strncasecmp(&uri[7], "localhost/", 10) == 0) {
823 p = &uri[16];
824 } else if (uri[7] == '/') {
825 p = &uri[7];
826 } else {
827 OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN,
828 OSSL_STORE_R_URI_AUTHORITY_UNSUPPORTED);
829 return NULL;
830 }
831 }
832
833 path_data[path_data_n].check_absolute = 1;
834#ifdef _WIN32
835 /* Windows file: URIs with a drive letter start with a / */
836 if (p[0] == '/' && p[2] == ':' && p[3] == '/') {
837 char c = ossl_tolower(p[1]);
838
839 if (c >= 'a' && c <= 'z') {
840 p++;
841 /* We know it's absolute, so no need to check */
842 path_data[path_data_n].check_absolute = 0;
843 }
844 }
845#endif
846 path_data[path_data_n++].path = p;
847 }
848
849
850 for (i = 0, path = NULL; path == NULL && i < path_data_n; i++) {
851 /*
852 * If the scheme "file" was an explicit part of the URI, the path must
853 * be absolute. So says RFC 8089
854 */
855 if (path_data[i].check_absolute && path_data[i].path[0] != '/') {
856 OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN,
857 OSSL_STORE_R_PATH_MUST_BE_ABSOLUTE);
858 ERR_add_error_data(1, path_data[i].path);
859 return NULL;
860 }
861
862 if (stat(path_data[i].path, &st) < 0) {
863 SYSerr(SYS_F_STAT, errno);
864 ERR_add_error_data(1, path_data[i].path);
865 } else {
866 path = path_data[i].path;
867 }
868 }
869 if (path == NULL) {
870 return NULL;
871 }
872
873 /* Successfully found a working path, clear possible collected errors */
874 ERR_clear_error();
875
876 ctx = OPENSSL_zalloc(sizeof(*ctx));
877 if (ctx == NULL) {
878 OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN, ERR_R_MALLOC_FAILURE);
879 return NULL;
880 }
881
882 if (S_ISDIR(st.st_mode)) {
883 /*
884 * Try to copy everything, even if we know that some of them must be
885 * NULL for the moment. This prevents errors in the future, when more
886 * components may be used.
887 */
888 ctx->_.dir.uri = OPENSSL_strdup(uri);
889 ctx->type = is_dir;
890
891 if (ctx->_.dir.uri == NULL)
892 goto err;
893
894 ctx->_.dir.last_entry = OPENSSL_DIR_read(&ctx->_.dir.ctx, path);
895 ctx->_.dir.last_errno = errno;
896 if (ctx->_.dir.last_entry == NULL) {
897 if (ctx->_.dir.last_errno != 0) {
898 char errbuf[256];
899 OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN, ERR_R_SYS_LIB);
900 errno = ctx->_.dir.last_errno;
901 if (openssl_strerror_r(errno, errbuf, sizeof(errbuf)))
902 ERR_add_error_data(1, errbuf);
903 goto err;
904 }
905 ctx->_.dir.end_reached = 1;
906 }
907 } else {
908 BIO *buff = NULL;
909 char peekbuf[4096] = { 0, };
910
911 if ((buff = BIO_new(BIO_f_buffer())) == NULL
912 || (ctx->_.file.file = BIO_new_file(path, "rb")) == NULL) {
913 BIO_free_all(buff);
914 goto err;
915 }
916
917 ctx->_.file.file = BIO_push(buff, ctx->_.file.file);
918 if (BIO_buffer_peek(ctx->_.file.file, peekbuf, sizeof(peekbuf) - 1) > 0) {
919 peekbuf[sizeof(peekbuf) - 1] = '\0';
920 if (strstr(peekbuf, "-----BEGIN ") != NULL)
921 ctx->type = is_pem;
922 }
923 }
924
925 return ctx;
926 err:
927 OSSL_STORE_LOADER_CTX_free(ctx);
928 return NULL;
929}
930
931static int file_ctrl(OSSL_STORE_LOADER_CTX *ctx, int cmd, va_list args)
932{
933 int ret = 1;
934
935 switch (cmd) {
936 case OSSL_STORE_C_USE_SECMEM:
937 {
938 int on = *(va_arg(args, int *));
939
940 switch (on) {
941 case 0:
942 ctx->flags &= ~FILE_FLAG_SECMEM;
943 break;
944 case 1:
945 ctx->flags |= FILE_FLAG_SECMEM;
946 break;
947 default:
948 OSSL_STOREerr(OSSL_STORE_F_FILE_CTRL,
949 ERR_R_PASSED_INVALID_ARGUMENT);
950 ret = 0;
951 break;
952 }
953 }
954 break;
955 default:
956 break;
957 }
958
959 return ret;
960}
961
962static int file_expect(OSSL_STORE_LOADER_CTX *ctx, int expected)
963{
964 ctx->expected_type = expected;
965 return 1;
966}
967
968static int file_find(OSSL_STORE_LOADER_CTX *ctx, OSSL_STORE_SEARCH *search)
969{
970 /*
971 * If ctx == NULL, the library is looking to know if this loader supports
972 * the given search type.
973 */
974
975 if (OSSL_STORE_SEARCH_get_type(search) == OSSL_STORE_SEARCH_BY_NAME) {
976 unsigned long hash = 0;
977
978 if (ctx == NULL)
979 return 1;
980
981 if (ctx->type != is_dir) {
982 OSSL_STOREerr(OSSL_STORE_F_FILE_FIND,
983 OSSL_STORE_R_SEARCH_ONLY_SUPPORTED_FOR_DIRECTORIES);
984 return 0;
985 }
986
987 hash = X509_NAME_hash(OSSL_STORE_SEARCH_get0_name(search));
988 BIO_snprintf(ctx->_.dir.search_name, sizeof(ctx->_.dir.search_name),
989 "%08lx", hash);
990 return 1;
991 }
992
993 if (ctx != NULL)
994 OSSL_STOREerr(OSSL_STORE_F_FILE_FIND,
995 OSSL_STORE_R_UNSUPPORTED_SEARCH_TYPE);
996 return 0;
997}
998
999/* Internal function to decode an already opened PEM file */
1000OSSL_STORE_LOADER_CTX *ossl_store_file_attach_pem_bio_int(BIO *bp)
1001{
1002 OSSL_STORE_LOADER_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
1003
1004 if (ctx == NULL) {
1005 OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_FILE_ATTACH_PEM_BIO_INT,
1006 ERR_R_MALLOC_FAILURE);
1007 return NULL;
1008 }
1009
1010 ctx->_.file.file = bp;
1011 ctx->type = is_pem;
1012
1013 return ctx;
1014}
1015
1016static OSSL_STORE_INFO *file_load_try_decode(OSSL_STORE_LOADER_CTX *ctx,
1017 const char *pem_name,
1018 const char *pem_header,
1019 unsigned char *data, size_t len,
1020 const UI_METHOD *ui_method,
1021 void *ui_data, int *matchcount)
1022{
1023 OSSL_STORE_INFO *result = NULL;
1024 BUF_MEM *new_mem = NULL;
1025 char *new_pem_name = NULL;
1026 int t = 0;
1027
1028 again:
1029 {
1030 size_t i = 0;
1031 void *handler_ctx = NULL;
1032 const FILE_HANDLER **matching_handlers =
1033 OPENSSL_zalloc(sizeof(*matching_handlers)
1034 * OSSL_NELEM(file_handlers));
1035
1036 if (matching_handlers == NULL) {
1037 OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD_TRY_DECODE,
1038 ERR_R_MALLOC_FAILURE);
1039 goto err;
1040 }
1041
1042 *matchcount = 0;
1043 for (i = 0; i < OSSL_NELEM(file_handlers); i++) {
1044 const FILE_HANDLER *handler = file_handlers[i];
1045 int try_matchcount = 0;
1046 void *tmp_handler_ctx = NULL;
1047 OSSL_STORE_INFO *tmp_result =
1048 handler->try_decode(pem_name, pem_header, data, len,
1049 &tmp_handler_ctx, &try_matchcount,
1050 ui_method, ui_data);
1051
1052 if (try_matchcount > 0) {
1053
1054 matching_handlers[*matchcount] = handler;
1055
1056 if (handler_ctx)
1057 handler->destroy_ctx(&handler_ctx);
1058 handler_ctx = tmp_handler_ctx;
1059
1060 if ((*matchcount += try_matchcount) > 1) {
1061 /* more than one match => ambiguous, kill any result */
1062 OSSL_STORE_INFO_free(result);
1063 OSSL_STORE_INFO_free(tmp_result);
1064 if (handler->destroy_ctx != NULL)
1065 handler->destroy_ctx(&handler_ctx);
1066 handler_ctx = NULL;
1067 tmp_result = NULL;
1068 result = NULL;
1069 }
1070 if (result == NULL)
1071 result = tmp_result;
1072 }
1073 }
1074
1075 if (*matchcount == 1 && matching_handlers[0]->repeatable) {
1076 ctx->_.file.last_handler = matching_handlers[0];
1077 ctx->_.file.last_handler_ctx = handler_ctx;
1078 }
1079
1080 OPENSSL_free(matching_handlers);
1081 }
1082
1083 err:
1084 OPENSSL_free(new_pem_name);
1085 BUF_MEM_free(new_mem);
1086
1087 if (result != NULL
1088 && (t = OSSL_STORE_INFO_get_type(result)) == OSSL_STORE_INFO_EMBEDDED) {
1089 pem_name = new_pem_name =
1090 ossl_store_info_get0_EMBEDDED_pem_name(result);
1091 new_mem = ossl_store_info_get0_EMBEDDED_buffer(result);
1092 data = (unsigned char *)new_mem->data;
1093 len = new_mem->length;
1094 OPENSSL_free(result);
1095 result = NULL;
1096 goto again;
1097 }
1098
1099 if (result != NULL)
1100 ERR_clear_error();
1101
1102 return result;
1103}
1104
1105static OSSL_STORE_INFO *file_load_try_repeat(OSSL_STORE_LOADER_CTX *ctx,
1106 const UI_METHOD *ui_method,
1107 void *ui_data)
1108{
1109 OSSL_STORE_INFO *result = NULL;
1110 int try_matchcount = 0;
1111
1112 if (ctx->_.file.last_handler != NULL) {
1113 result =
1114 ctx->_.file.last_handler->try_decode(NULL, NULL, NULL, 0,
1115 &ctx->_.file.last_handler_ctx,
1116 &try_matchcount,
1117 ui_method, ui_data);
1118
1119 if (result == NULL) {
1120 ctx->_.file.last_handler->destroy_ctx(&ctx->_.file.last_handler_ctx);
1121 ctx->_.file.last_handler_ctx = NULL;
1122 ctx->_.file.last_handler = NULL;
1123 }
1124 }
1125 return result;
1126}
1127
1128static void pem_free_flag(void *pem_data, int secure, size_t num)
1129{
1130 if (secure)
1131 OPENSSL_secure_clear_free(pem_data, num);
1132 else
1133 OPENSSL_free(pem_data);
1134}
1135static int file_read_pem(BIO *bp, char **pem_name, char **pem_header,
1136 unsigned char **data, long *len,
1137 const UI_METHOD *ui_method,
1138 void *ui_data, int secure)
1139{
1140 int i = secure
1141 ? PEM_read_bio_ex(bp, pem_name, pem_header, data, len,
1142 PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE)
1143 : PEM_read_bio(bp, pem_name, pem_header, data, len);
1144
1145 if (i <= 0)
1146 return 0;
1147
1148 /*
1149 * 10 is the number of characters in "Proc-Type:", which
1150 * PEM_get_EVP_CIPHER_INFO() requires to be present.
1151 * If the PEM header has less characters than that, it's
1152 * not worth spending cycles on it.
1153 */
1154 if (strlen(*pem_header) > 10) {
1155 EVP_CIPHER_INFO cipher;
1156 struct pem_pass_data pass_data;
1157
1158 if (!PEM_get_EVP_CIPHER_INFO(*pem_header, &cipher)
1159 || !file_fill_pem_pass_data(&pass_data, "PEM", ui_method, ui_data)
1160 || !PEM_do_header(&cipher, *data, len, file_get_pem_pass,
1161 &pass_data)) {
1162 return 0;
1163 }
1164 }
1165 return 1;
1166}
1167
1168static int file_read_asn1(BIO *bp, unsigned char **data, long *len)
1169{
1170 BUF_MEM *mem = NULL;
1171
1172 if (asn1_d2i_read_bio(bp, &mem) < 0)
1173 return 0;
1174
1175 *data = (unsigned char *)mem->data;
1176 *len = (long)mem->length;
1177 OPENSSL_free(mem);
1178
1179 return 1;
1180}
1181
1182static int ends_with_dirsep(const char *uri)
1183{
1184 if (*uri != '\0')
1185 uri += strlen(uri) - 1;
1186#if defined __VMS
1187 if (*uri == ']' || *uri == '>' || *uri == ':')
1188 return 1;
1189#elif defined _WIN32
1190 if (*uri == '\\')
1191 return 1;
1192#endif
1193 return *uri == '/';
1194}
1195
1196static int file_name_to_uri(OSSL_STORE_LOADER_CTX *ctx, const char *name,
1197 char **data)
1198{
1199 assert(name != NULL);
1200 assert(data != NULL);
1201 {
1202 const char *pathsep = ends_with_dirsep(ctx->_.dir.uri) ? "" : "/";
1203 long calculated_length = strlen(ctx->_.dir.uri) + strlen(pathsep)
1204 + strlen(name) + 1 /* \0 */;
1205
1206 *data = OPENSSL_zalloc(calculated_length);
1207 if (*data == NULL) {
1208 OSSL_STOREerr(OSSL_STORE_F_FILE_NAME_TO_URI, ERR_R_MALLOC_FAILURE);
1209 return 0;
1210 }
1211
1212 OPENSSL_strlcat(*data, ctx->_.dir.uri, calculated_length);
1213 OPENSSL_strlcat(*data, pathsep, calculated_length);
1214 OPENSSL_strlcat(*data, name, calculated_length);
1215 }
1216 return 1;
1217}
1218
1219static int file_name_check(OSSL_STORE_LOADER_CTX *ctx, const char *name)
1220{
1221 const char *p = NULL;
1222
1223 /* If there are no search criteria, all names are accepted */
1224 if (ctx->_.dir.search_name[0] == '\0')
1225 return 1;
1226
1227 /* If the expected type isn't supported, no name is accepted */
1228 if (ctx->expected_type != 0
1229 && ctx->expected_type != OSSL_STORE_INFO_CERT
1230 && ctx->expected_type != OSSL_STORE_INFO_CRL)
1231 return 0;
1232
1233 /*
1234 * First, check the basename
1235 */
1236 if (strncasecmp(name, ctx->_.dir.search_name,
1237 sizeof(ctx->_.dir.search_name) - 1) != 0
1238 || name[sizeof(ctx->_.dir.search_name) - 1] != '.')
1239 return 0;
1240 p = &name[sizeof(ctx->_.dir.search_name)];
1241
1242 /*
1243 * Then, if the expected type is a CRL, check that the extension starts
1244 * with 'r'
1245 */
1246 if (*p == 'r') {
1247 p++;
1248 if (ctx->expected_type != 0
1249 && ctx->expected_type != OSSL_STORE_INFO_CRL)
1250 return 0;
1251 } else if (ctx->expected_type == OSSL_STORE_INFO_CRL) {
1252 return 0;
1253 }
1254
1255 /*
1256 * Last, check that the rest of the extension is a decimal number, at
1257 * least one digit long.
1258 */
1259 if (!ossl_isdigit(*p))
1260 return 0;
1261 while (ossl_isdigit(*p))
1262 p++;
1263
1264# ifdef __VMS
1265 /*
1266 * One extra step here, check for a possible generation number.
1267 */
1268 if (*p == ';')
1269 for (p++; *p != '\0'; p++)
1270 if (!ossl_isdigit(*p))
1271 break;
1272# endif
1273
1274 /*
1275 * If we've reached the end of the string at this point, we've successfully
1276 * found a fitting file name.
1277 */
1278 return *p == '\0';
1279}
1280
1281static int file_eof(OSSL_STORE_LOADER_CTX *ctx);
1282static int file_error(OSSL_STORE_LOADER_CTX *ctx);
1283static OSSL_STORE_INFO *file_load(OSSL_STORE_LOADER_CTX *ctx,
1284 const UI_METHOD *ui_method, void *ui_data)
1285{
1286 OSSL_STORE_INFO *result = NULL;
1287
1288 ctx->errcnt = 0;
1289 ERR_clear_error();
1290
1291 if (ctx->type == is_dir) {
1292 do {
1293 char *newname = NULL;
1294
1295 if (ctx->_.dir.last_entry == NULL) {
1296 if (!ctx->_.dir.end_reached) {
1297 char errbuf[256];
1298 assert(ctx->_.dir.last_errno != 0);
1299 OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD, ERR_R_SYS_LIB);
1300 errno = ctx->_.dir.last_errno;
1301 ctx->errcnt++;
1302 if (openssl_strerror_r(errno, errbuf, sizeof(errbuf)))
1303 ERR_add_error_data(1, errbuf);
1304 }
1305 return NULL;
1306 }
1307
1308 if (ctx->_.dir.last_entry[0] != '.'
1309 && file_name_check(ctx, ctx->_.dir.last_entry)
1310 && !file_name_to_uri(ctx, ctx->_.dir.last_entry, &newname))
1311 return NULL;
1312
1313 /*
1314 * On the first call (with a NULL context), OPENSSL_DIR_read()
1315 * cares about the second argument. On the following calls, it
1316 * only cares that it isn't NULL. Therefore, we can safely give
1317 * it our URI here.
1318 */
1319 ctx->_.dir.last_entry = OPENSSL_DIR_read(&ctx->_.dir.ctx,
1320 ctx->_.dir.uri);
1321 ctx->_.dir.last_errno = errno;
1322 if (ctx->_.dir.last_entry == NULL && ctx->_.dir.last_errno == 0)
1323 ctx->_.dir.end_reached = 1;
1324
1325 if (newname != NULL
1326 && (result = OSSL_STORE_INFO_new_NAME(newname)) == NULL) {
1327 OPENSSL_free(newname);
1328 OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD, ERR_R_OSSL_STORE_LIB);
1329 return NULL;
1330 }
1331 } while (result == NULL && !file_eof(ctx));
1332 } else {
1333 int matchcount = -1;
1334
1335 again:
1336 result = file_load_try_repeat(ctx, ui_method, ui_data);
1337 if (result != NULL)
1338 return result;
1339
1340 if (file_eof(ctx))
1341 return NULL;
1342
1343 do {
1344 char *pem_name = NULL; /* PEM record name */
1345 char *pem_header = NULL; /* PEM record header */
1346 unsigned char *data = NULL; /* DER encoded data */
1347 long len = 0; /* DER encoded data length */
1348
1349 matchcount = -1;
1350 if (ctx->type == is_pem) {
1351 if (!file_read_pem(ctx->_.file.file, &pem_name, &pem_header,
1352 &data, &len, ui_method, ui_data,
1353 (ctx->flags & FILE_FLAG_SECMEM) != 0)) {
1354 ctx->errcnt++;
1355 goto endloop;
1356 }
1357 } else {
1358 if (!file_read_asn1(ctx->_.file.file, &data, &len)) {
1359 ctx->errcnt++;
1360 goto endloop;
1361 }
1362 }
1363
1364 result = file_load_try_decode(ctx, pem_name, pem_header, data, len,
1365 ui_method, ui_data, &matchcount);
1366
1367 if (result != NULL)
1368 goto endloop;
1369
1370 /*
1371 * If a PEM name matches more than one handler, the handlers are
1372 * badly coded.
1373 */
1374 if (!ossl_assert(pem_name == NULL || matchcount <= 1)) {
1375 ctx->errcnt++;
1376 goto endloop;
1377 }
1378
1379 if (matchcount > 1) {
1380 OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD,
1381 OSSL_STORE_R_AMBIGUOUS_CONTENT_TYPE);
1382 } else if (matchcount == 1) {
1383 /*
1384 * If there are other errors on the stack, they already show
1385 * what the problem is.
1386 */
1387 if (ERR_peek_error() == 0) {
1388 OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD,
1389 OSSL_STORE_R_UNSUPPORTED_CONTENT_TYPE);
1390 if (pem_name != NULL)
1391 ERR_add_error_data(3, "PEM type is '", pem_name, "'");
1392 }
1393 }
1394 if (matchcount > 0)
1395 ctx->errcnt++;
1396
1397 endloop:
1398 pem_free_flag(pem_name, (ctx->flags & FILE_FLAG_SECMEM) != 0, 0);
1399 pem_free_flag(pem_header, (ctx->flags & FILE_FLAG_SECMEM) != 0, 0);
1400 pem_free_flag(data, (ctx->flags & FILE_FLAG_SECMEM) != 0, len);
1401 } while (matchcount == 0 && !file_eof(ctx) && !file_error(ctx));
1402
1403 /* We bail out on ambiguity */
1404 if (matchcount > 1)
1405 return NULL;
1406
1407 if (result != NULL
1408 && ctx->expected_type != 0
1409 && ctx->expected_type != OSSL_STORE_INFO_get_type(result)) {
1410 OSSL_STORE_INFO_free(result);
1411 goto again;
1412 }
1413 }
1414
1415 return result;
1416}
1417
1418static int file_error(OSSL_STORE_LOADER_CTX *ctx)
1419{
1420 return ctx->errcnt > 0;
1421}
1422
1423static int file_eof(OSSL_STORE_LOADER_CTX *ctx)
1424{
1425 if (ctx->type == is_dir)
1426 return ctx->_.dir.end_reached;
1427
1428 if (ctx->_.file.last_handler != NULL
1429 && !ctx->_.file.last_handler->eof(ctx->_.file.last_handler_ctx))
1430 return 0;
1431 return BIO_eof(ctx->_.file.file);
1432}
1433
1434static int file_close(OSSL_STORE_LOADER_CTX *ctx)
1435{
1436 if (ctx->type == is_dir) {
1437 OPENSSL_DIR_end(&ctx->_.dir.ctx);
1438 } else {
1439 BIO_free_all(ctx->_.file.file);
1440 }
1441 OSSL_STORE_LOADER_CTX_free(ctx);
1442 return 1;
1443}
1444
1445int ossl_store_file_detach_pem_bio_int(OSSL_STORE_LOADER_CTX *ctx)
1446{
1447 OSSL_STORE_LOADER_CTX_free(ctx);
1448 return 1;
1449}
1450
1451static OSSL_STORE_LOADER file_loader =
1452 {
1453 "file",
1454 NULL,
1455 file_open,
1456 file_ctrl,
1457 file_expect,
1458 file_find,
1459 file_load,
1460 file_eof,
1461 file_error,
1462 file_close
1463 };
1464
1465static void store_file_loader_deinit(void)
1466{
1467 ossl_store_unregister_loader_int(file_loader.scheme);
1468}
1469
1470int ossl_store_file_loader_init(void)
1471{
1472 int ret = ossl_store_register_loader_int(&file_loader);
1473
1474 OPENSSL_atexit(store_file_loader_deinit);
1475 return ret;
1476}
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