loader_file.c@ 91772

Last change on this file since 91772 was 91772, checked in by vboxsync, 3 years ago
openssl-1.1.1l: Applied and adjusted our OpenSSL changes to 1.1.1l. bugref:10126
File size: 45.8 KB

Line
1	/*
2	* Copyright 2016-2021 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
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	p8 = NULL;
374
375	store_info = ossl_store_info_new_EMBEDDED(PEM_STRING_PKCS8INF, mem);
376	if (store_info == NULL) {
377	OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS8ENCRYPTED,
378	ERR_R_MALLOC_FAILURE);
379	goto nop8;
380	}
381
382	return store_info;
383	nop8:
384	X509_SIG_free(p8);
385	BUF_MEM_free(mem);
386	return NULL;
387	}
388
389	static FILE_HANDLER PKCS8Encrypted_handler = {
390	"PKCS8Encrypted",
391	try_decode_PKCS8Encrypted
392	};
393
394	/*
395	* Private key decoder. Decodes all sorts of private keys, both PKCS#8
396	* encoded ones and old style PEM ones (with the key type is encoded into
397	* the PEM name).
398	*/
399	int pem_check_suffix(const char pem_str, const char suffix);
400	static OSSL_STORE_INFO try_decode_PrivateKey(const char pem_name,
401	const char *pem_header,
402	const unsigned char *blob,
403	size_t len, void **pctx,
404	int *matchcount,
405	const UI_METHOD *ui_method,
406	void *ui_data)
407	{
408	OSSL_STORE_INFO *store_info = NULL;
409	EVP_PKEY *pkey = NULL;
410	const EVP_PKEY_ASN1_METHOD *ameth = NULL;
411
412	if (pem_name != NULL) {
413	if (strcmp(pem_name, PEM_STRING_PKCS8INF) == 0) {
414	PKCS8_PRIV_KEY_INFO *p8inf =
415	d2i_PKCS8_PRIV_KEY_INFO(NULL, &blob, len);
416
417	*matchcount = 1;
418	if (p8inf != NULL)
419	pkey = EVP_PKCS82PKEY(p8inf);
420	PKCS8_PRIV_KEY_INFO_free(p8inf);
421	} else {
422	int slen;
423
424	if ((slen = pem_check_suffix(pem_name, "PRIVATE KEY")) > 0
425	&& (ameth = EVP_PKEY_asn1_find_str(NULL, pem_name,
426	slen)) != NULL) {
427	*matchcount = 1;
428	pkey = d2i_PrivateKey(ameth->pkey_id, NULL, &blob, len);
429	}
430	}
431	} else {
432	int i;
433	#ifndef OPENSSL_NO_ENGINE
434	ENGINE *curengine = ENGINE_get_first();
435
436	while (curengine != NULL) {
437	ENGINE_PKEY_ASN1_METHS_PTR asn1meths =
438	ENGINE_get_pkey_asn1_meths(curengine);
439
440	if (asn1meths != NULL) {
441	const int *nids = NULL;
442	int nids_n = asn1meths(curengine, NULL, &nids, 0);
443
444	for (i = 0; i < nids_n; i++) {
445	EVP_PKEY_ASN1_METHOD *ameth2 = NULL;
446	EVP_PKEY *tmp_pkey = NULL;
447	const unsigned char *tmp_blob = blob;
448
449	if (!asn1meths(curengine, &ameth2, NULL, nids[i]))
450	continue;
451	if (ameth2 == NULL
452	\|\| ameth2->pkey_flags & ASN1_PKEY_ALIAS)
453	continue;
454
455	tmp_pkey = d2i_PrivateKey(ameth2->pkey_id, NULL,
456	&tmp_blob, len);
457	if (tmp_pkey != NULL) {
458	if (pkey != NULL)
459	EVP_PKEY_free(tmp_pkey);
460	else
461	pkey = tmp_pkey;
462	(*matchcount)++;
463	}
464	}
465	}
466	curengine = ENGINE_get_next(curengine);
467	}
468	#endif
469
470	for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
471	EVP_PKEY *tmp_pkey = NULL;
472	const unsigned char *tmp_blob = blob;
473
474	ameth = EVP_PKEY_asn1_get0(i);
475	if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
476	continue;
477
478	tmp_pkey = d2i_PrivateKey(ameth->pkey_id, NULL, &tmp_blob, len);
479	if (tmp_pkey != NULL) {
480	if (pkey != NULL)
481	EVP_PKEY_free(tmp_pkey);
482	else
483	pkey = tmp_pkey;
484	(*matchcount)++;
485	}
486	}
487
488	if (*matchcount > 1) {
489	EVP_PKEY_free(pkey);
490	pkey = NULL;
491	}
492	}
493	if (pkey == NULL)
494	/* No match */
495	return NULL;
496
497	store_info = OSSL_STORE_INFO_new_PKEY(pkey);
498	if (store_info == NULL)
499	EVP_PKEY_free(pkey);
500
501	return store_info;
502	}
503
504	static FILE_HANDLER PrivateKey_handler = {
505	"PrivateKey",
506	try_decode_PrivateKey
507	};
508
509	/*
510	* Public key decoder. Only supports SubjectPublicKeyInfo formatted keys.
511	*/
512	static OSSL_STORE_INFO try_decode_PUBKEY(const char pem_name,
513	const char *pem_header,
514	const unsigned char *blob,
515	size_t len, void **pctx,
516	int *matchcount,
517	const UI_METHOD *ui_method,
518	void *ui_data)
519	{
520	OSSL_STORE_INFO *store_info = NULL;
521	EVP_PKEY *pkey = NULL;
522
523	if (pem_name != NULL) {
524	if (strcmp(pem_name, PEM_STRING_PUBLIC) != 0)
525	/* No match */
526	return NULL;
527	*matchcount = 1;
528	}
529
530	if ((pkey = d2i_PUBKEY(NULL, &blob, len)) != NULL) {
531	*matchcount = 1;
532	store_info = OSSL_STORE_INFO_new_PKEY(pkey);
533	}
534
535	return store_info;
536	}
537
538	static FILE_HANDLER PUBKEY_handler = {
539	"PUBKEY",
540	try_decode_PUBKEY
541	};
542
543	/*
544	* Key parameter decoder.
545	*/
546	static OSSL_STORE_INFO try_decode_params(const char pem_name,
547	const char *pem_header,
548	const unsigned char *blob,
549	size_t len, void **pctx,
550	int *matchcount,
551	const UI_METHOD *ui_method,
552	void *ui_data)
553	{
554	OSSL_STORE_INFO *store_info = NULL;
555	int slen = 0;
556	EVP_PKEY *pkey = NULL;
557	const EVP_PKEY_ASN1_METHOD *ameth = NULL;
558	int ok = 0;
559
560	if (pem_name != NULL) {
561	if ((slen = pem_check_suffix(pem_name, "PARAMETERS")) == 0)
562	return NULL;
563	*matchcount = 1;
564	}
565
566	if (slen > 0) {
567	if ((pkey = EVP_PKEY_new()) == NULL) {
568	OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PARAMS, ERR_R_EVP_LIB);
569	return NULL;
570	}
571
572
573	if (EVP_PKEY_set_type_str(pkey, pem_name, slen)
574	&& (ameth = EVP_PKEY_get0_asn1(pkey)) != NULL
575	&& ameth->param_decode != NULL
576	&& ameth->param_decode(pkey, &blob, len))
577	ok = 1;
578	} else {
579	int i;
580	EVP_PKEY *tmp_pkey = NULL;
581
582	for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
583	const unsigned char *tmp_blob = blob;
584
585	if (tmp_pkey == NULL && (tmp_pkey = EVP_PKEY_new()) == NULL) {
586	OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PARAMS, ERR_R_EVP_LIB);
587	break;
588	}
589
590	ameth = EVP_PKEY_asn1_get0(i);
591	if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
592	continue;
593
594	if (EVP_PKEY_set_type(tmp_pkey, ameth->pkey_id)
595	&& (ameth = EVP_PKEY_get0_asn1(tmp_pkey)) != NULL
596	&& ameth->param_decode != NULL
597	&& ameth->param_decode(tmp_pkey, &tmp_blob, len)) {
598	if (pkey != NULL)
599	EVP_PKEY_free(tmp_pkey);
600	else
601	pkey = tmp_pkey;
602	tmp_pkey = NULL;
603	(*matchcount)++;
604	}
605	}
606
607	EVP_PKEY_free(tmp_pkey);
608	if (*matchcount == 1) {
609	ok = 1;
610	}
611	}
612
613	if (ok)
614	store_info = OSSL_STORE_INFO_new_PARAMS(pkey);
615	if (store_info == NULL)
616	EVP_PKEY_free(pkey);
617
618	return store_info;
619	}
620
621	static FILE_HANDLER params_handler = {
622	"params",
623	try_decode_params
624	};
625
626	/*
627	* X.509 certificate decoder.
628	*/
629	static OSSL_STORE_INFO try_decode_X509Certificate(const char pem_name,
630	const char *pem_header,
631	const unsigned char *blob,
632	size_t len, void **pctx,
633	int *matchcount,
634	const UI_METHOD *ui_method,
635	void *ui_data)
636	{
637	OSSL_STORE_INFO *store_info = NULL;
638	X509 *cert = NULL;
639
640	/*
641	* In most cases, we can try to interpret the serialized data as a trusted
642	* cert (X509 + X509_AUX) and fall back to reading it as a normal cert
643	* (just X509), but if the PEM name specifically declares it as a trusted
644	* cert, then no fallback should be engaged. \|ignore_trusted\| tells if
645	* the fallback can be used (1) or not (0).
646	*/
647	int ignore_trusted = 1;
648
649	if (pem_name != NULL) {
650	if (strcmp(pem_name, PEM_STRING_X509_TRUSTED) == 0)
651	ignore_trusted = 0;
652	else if (strcmp(pem_name, PEM_STRING_X509_OLD) != 0
653	&& strcmp(pem_name, PEM_STRING_X509) != 0)
654	/* No match */
655	return NULL;
656	*matchcount = 1;
657	}
658
659	if ((cert = d2i_X509_AUX(NULL, &blob, len)) != NULL
660	\|\| (ignore_trusted && (cert = d2i_X509(NULL, &blob, len)) != NULL)) {
661	*matchcount = 1;
662	store_info = OSSL_STORE_INFO_new_CERT(cert);
663	}
664
665	if (store_info == NULL)
666	X509_free(cert);
667
668	return store_info;
669	}
670
671	static FILE_HANDLER X509Certificate_handler = {
672	"X509Certificate",
673	try_decode_X509Certificate
674	};
675
676	/*
677	* X.509 CRL decoder.
678	*/
679	static OSSL_STORE_INFO try_decode_X509CRL(const char pem_name,
680	const char *pem_header,
681	const unsigned char *blob,
682	size_t len, void **pctx,
683	int *matchcount,
684	const UI_METHOD *ui_method,
685	void *ui_data)
686	{
687	OSSL_STORE_INFO *store_info = NULL;
688	X509_CRL *crl = NULL;
689
690	if (pem_name != NULL) {
691	if (strcmp(pem_name, PEM_STRING_X509_CRL) != 0)
692	/* No match */
693	return NULL;
694	*matchcount = 1;
695	}
696
697	if ((crl = d2i_X509_CRL(NULL, &blob, len)) != NULL) {
698	*matchcount = 1;
699	store_info = OSSL_STORE_INFO_new_CRL(crl);
700	}
701
702	if (store_info == NULL)
703	X509_CRL_free(crl);
704
705	return store_info;
706	}
707
708	static FILE_HANDLER X509CRL_handler = {
709	"X509CRL",
710	try_decode_X509CRL
711	};
712
713	/*
714	* To finish it all off, we collect all the handlers.
715	*/
716	static const FILE_HANDLER *file_handlers[] = {
717	&PKCS12_handler,
718	&PKCS8Encrypted_handler,
719	&X509Certificate_handler,
720	&X509CRL_handler,
721	&params_handler,
722	&PUBKEY_handler,
723	&PrivateKey_handler,
724	};
725
726
727	/*-
728	* The loader itself
729	* -----------------
730	*/
731
732	struct ossl_store_loader_ctx_st {
733	enum {
734	is_raw = 0,
735	is_pem,
736	is_dir
737	} type;
738	int errcnt;
739	#define FILE_FLAG_SECMEM (1<<0)
740	unsigned int flags;
741	union {
742	struct { /* Used with is_raw and is_pem */
743	BIO *file;
744
745	/*
746	* The following are used when the handler is marked as
747	* repeatable
748	*/
749	const FILE_HANDLER *last_handler;
750	void *last_handler_ctx;
751	} file;
752	struct { /* Used with is_dir */
753	OPENSSL_DIR_CTX *ctx;
754	int end_reached;
755	char *uri;
756
757	/*
758	* When a search expression is given, these are filled in.
759	* \|search_name\| contains the file basename to look for.
760	* The string is exactly 8 characters long.
761	*/
762	char search_name[9];
763
764	/*
765	* The directory reading utility we have combines opening with
766	* reading the first name. To make sure we can detect the end
767	* at the right time, we read early and cache the name.
768	*/
769	const char *last_entry;
770	int last_errno;
771	} dir;
772	} _;
773
774	/* Expected object type. May be unspecified */
775	int expected_type;
776	};
777
778	static void OSSL_STORE_LOADER_CTX_free(OSSL_STORE_LOADER_CTX *ctx)
779	{
780	if (ctx->type == is_dir) {
781	OPENSSL_free(ctx->_.dir.uri);
782	} else {
783	if (ctx->_.file.last_handler != NULL) {
784	ctx->_.file.last_handler->destroy_ctx(&ctx->_.file.last_handler_ctx);
785	ctx->_.file.last_handler_ctx = NULL;
786	ctx->_.file.last_handler = NULL;
787	}
788	}
789	OPENSSL_free(ctx);
790	}
791
792	static OSSL_STORE_LOADER_CTX file_open(const OSSL_STORE_LOADER loader,
793	const char *uri,
794	const UI_METHOD *ui_method,
795	void *ui_data)
796	{
797	OSSL_STORE_LOADER_CTX *ctx = NULL;
798	struct stat st;
799	struct {
800	const char *path;
801	unsigned int check_absolute:1;
802	} path_data[2];
803	size_t path_data_n = 0, i;
804	const char *path;
805
806	/*
807	* First step, just take the URI as is.
808	*/
809	path_data[path_data_n].check_absolute = 0;
810	path_data[path_data_n++].path = uri;
811
812	/*
813	* Second step, if the URI appears to start with the 'file' scheme,
814	* extract the path and make that the second path to check.
815	* There's a special case if the URI also contains an authority, then
816	* the full URI shouldn't be used as a path anywhere.
817	*/
818	if (strncasecmp(uri, "file:", 5) == 0) {
819	const char *p = &uri[5];
820
821	if (strncmp(&uri[5], "//", 2) == 0) {
822	path_data_n--; /* Invalidate using the full URI */
823	if (strncasecmp(&uri[7], "localhost/", 10) == 0) {
824	p = &uri[16];
825	} else if (uri[7] == '/') {
826	p = &uri[7];
827	} else {
828	OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN,
829	OSSL_STORE_R_URI_AUTHORITY_UNSUPPORTED);
830	return NULL;
831	}
832	}
833
834	path_data[path_data_n].check_absolute = 1;
835	#ifdef _WIN32
836	/* Windows file: URIs with a drive letter start with a / */
837	if (p[0] == '/' && p[2] == ':' && p[3] == '/') {
838	char c = ossl_tolower(p[1]);
839
840	if (c >= 'a' && c <= 'z') {
841	p++;
842	/* We know it's absolute, so no need to check */
843	path_data[path_data_n].check_absolute = 0;
844	}
845	}
846	#endif
847	path_data[path_data_n++].path = p;
848	}
849
850
851	for (i = 0, path = NULL; path == NULL && i < path_data_n; i++) {
852	/*
853	* If the scheme "file" was an explicit part of the URI, the path must
854	* be absolute. So says RFC 8089
855	*/
856	if (path_data[i].check_absolute && path_data[i].path[0] != '/') {
857	OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN,
858	OSSL_STORE_R_PATH_MUST_BE_ABSOLUTE);
859	ERR_add_error_data(1, path_data[i].path);
860	return NULL;
861	}
862
863	if (stat(path_data[i].path, &st) < 0) {
864	SYSerr(SYS_F_STAT, errno);
865	ERR_add_error_data(1, path_data[i].path);
866	} else {
867	path = path_data[i].path;
868	}
869	}
870	if (path == NULL) {
871	return NULL;
872	}
873
874	/* Successfully found a working path, clear possible collected errors */
875	ERR_clear_error();
876
877	ctx = OPENSSL_zalloc(sizeof(*ctx));
878	if (ctx == NULL) {
879	OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN, ERR_R_MALLOC_FAILURE);
880	return NULL;
881	}
882
883	if (S_ISDIR(st.st_mode)) {
884	/*
885	* Try to copy everything, even if we know that some of them must be
886	* NULL for the moment. This prevents errors in the future, when more
887	* components may be used.
888	*/
889	ctx->_.dir.uri = OPENSSL_strdup(uri);
890	ctx->type = is_dir;
891
892	if (ctx->_.dir.uri == NULL)
893	goto err;
894
895	ctx->_.dir.last_entry = OPENSSL_DIR_read(&ctx->_.dir.ctx, path);
896	ctx->_.dir.last_errno = errno;
897	if (ctx->_.dir.last_entry == NULL) {
898	if (ctx->_.dir.last_errno != 0) {
899	char errbuf[256];
900	OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN, ERR_R_SYS_LIB);
901	errno = ctx->_.dir.last_errno;
902	if (openssl_strerror_r(errno, errbuf, sizeof(errbuf)))
903	ERR_add_error_data(1, errbuf);
904	goto err;
905	}
906	ctx->_.dir.end_reached = 1;
907	}
908	} else {
909	BIO *buff = NULL;
910	char peekbuf[4096] = { 0, };
911
912	if ((buff = BIO_new(BIO_f_buffer())) == NULL
913	\|\| (ctx->_.file.file = BIO_new_file(path, "rb")) == NULL) {
914	BIO_free_all(buff);
915	goto err;
916	}
917
918	ctx->_.file.file = BIO_push(buff, ctx->_.file.file);
919	if (BIO_buffer_peek(ctx->_.file.file, peekbuf, sizeof(peekbuf) - 1) > 0) {
920	peekbuf[sizeof(peekbuf) - 1] = '\0';
921	if (strstr(peekbuf, "-----BEGIN ") != NULL)
922	ctx->type = is_pem;
923	}
924	}
925
926	return ctx;
927	err:
928	OSSL_STORE_LOADER_CTX_free(ctx);
929	return NULL;
930	}
931
932	static int file_ctrl(OSSL_STORE_LOADER_CTX *ctx, int cmd, va_list args)
933	{
934	int ret = 1;
935
936	switch (cmd) {
937	case OSSL_STORE_C_USE_SECMEM:
938	{
939	int on = (va_arg(args, int ));
940
941	switch (on) {
942	case 0:
943	ctx->flags &= ~FILE_FLAG_SECMEM;
944	break;
945	case 1:
946	ctx->flags \|= FILE_FLAG_SECMEM;
947	break;
948	default:
949	OSSL_STOREerr(OSSL_STORE_F_FILE_CTRL,
950	ERR_R_PASSED_INVALID_ARGUMENT);
951	ret = 0;
952	break;
953	}
954	}
955	break;
956	default:
957	break;
958	}
959
960	return ret;
961	}
962
963	static int file_expect(OSSL_STORE_LOADER_CTX *ctx, int expected)
964	{
965	ctx->expected_type = expected;
966	return 1;
967	}
968
969	static int file_find(OSSL_STORE_LOADER_CTX ctx, OSSL_STORE_SEARCH search)
970	{
971	/*
972	* If ctx == NULL, the library is looking to know if this loader supports
973	* the given search type.
974	*/
975
976	if (OSSL_STORE_SEARCH_get_type(search) == OSSL_STORE_SEARCH_BY_NAME) {
977	unsigned long hash = 0;
978
979	if (ctx == NULL)
980	return 1;
981
982	if (ctx->type != is_dir) {
983	OSSL_STOREerr(OSSL_STORE_F_FILE_FIND,
984	OSSL_STORE_R_SEARCH_ONLY_SUPPORTED_FOR_DIRECTORIES);
985	return 0;
986	}
987
988	hash = X509_NAME_hash(OSSL_STORE_SEARCH_get0_name(search));
989	BIO_snprintf(ctx->_.dir.search_name, sizeof(ctx->_.dir.search_name),
990	"%08lx", hash);
991	return 1;
992	}
993
994	if (ctx != NULL)
995	OSSL_STOREerr(OSSL_STORE_F_FILE_FIND,
996	OSSL_STORE_R_UNSUPPORTED_SEARCH_TYPE);
997	return 0;
998	}
999
1000	/* Internal function to decode an already opened PEM file */
1001	OSSL_STORE_LOADER_CTX ossl_store_file_attach_pem_bio_int(BIO bp)
1002	{
1003	OSSL_STORE_LOADER_CTX ctx = OPENSSL_zalloc(sizeof(ctx));
1004
1005	if (ctx == NULL) {
1006	OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_FILE_ATTACH_PEM_BIO_INT,
1007	ERR_R_MALLOC_FAILURE);
1008	return NULL;
1009	}
1010
1011	ctx->_.file.file = bp;
1012	ctx->type = is_pem;
1013
1014	return ctx;
1015	}
1016
1017	static OSSL_STORE_INFO file_load_try_decode(OSSL_STORE_LOADER_CTX ctx,
1018	const char *pem_name,
1019	const char *pem_header,
1020	unsigned char *data, size_t len,
1021	const UI_METHOD *ui_method,
1022	void ui_data, int matchcount)
1023	{
1024	OSSL_STORE_INFO *result = NULL;
1025	BUF_MEM *new_mem = NULL;
1026	char *new_pem_name = NULL;
1027	int t = 0;
1028
1029	again:
1030	{
1031	size_t i = 0;
1032	void *handler_ctx = NULL;
1033	const FILE_HANDLER **matching_handlers =
1034	OPENSSL_zalloc(sizeof(*matching_handlers)
1035	* OSSL_NELEM(file_handlers));
1036
1037	if (matching_handlers == NULL) {
1038	OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD_TRY_DECODE,
1039	ERR_R_MALLOC_FAILURE);
1040	goto err;
1041	}
1042
1043	*matchcount = 0;
1044	for (i = 0; i < OSSL_NELEM(file_handlers); i++) {
1045	const FILE_HANDLER *handler = file_handlers[i];
1046	int try_matchcount = 0;
1047	void *tmp_handler_ctx = NULL;
1048	OSSL_STORE_INFO *tmp_result =
1049	handler->try_decode(pem_name, pem_header, data, len,
1050	&tmp_handler_ctx, &try_matchcount,
1051	ui_method, ui_data);
1052
1053	if (try_matchcount > 0) {
1054
1055	matching_handlers[*matchcount] = handler;
1056
1057	if (handler_ctx)
1058	handler->destroy_ctx(&handler_ctx);
1059	handler_ctx = tmp_handler_ctx;
1060
1061	if ((*matchcount += try_matchcount) > 1) {
1062	/* more than one match => ambiguous, kill any result */
1063	OSSL_STORE_INFO_free(result);
1064	OSSL_STORE_INFO_free(tmp_result);
1065	if (handler->destroy_ctx != NULL)
1066	handler->destroy_ctx(&handler_ctx);
1067	handler_ctx = NULL;
1068	tmp_result = NULL;
1069	result = NULL;
1070	}
1071	if (result == NULL)
1072	result = tmp_result;
1073	}
1074	}
1075
1076	if (*matchcount == 1 && matching_handlers[0]->repeatable) {
1077	ctx->_.file.last_handler = matching_handlers[0];
1078	ctx->_.file.last_handler_ctx = handler_ctx;
1079	}
1080
1081	OPENSSL_free(matching_handlers);
1082	}
1083
1084	err:
1085	OPENSSL_free(new_pem_name);
1086	BUF_MEM_free(new_mem);
1087
1088	if (result != NULL
1089	&& (t = OSSL_STORE_INFO_get_type(result)) == OSSL_STORE_INFO_EMBEDDED) {
1090	pem_name = new_pem_name =
1091	ossl_store_info_get0_EMBEDDED_pem_name(result);
1092	new_mem = ossl_store_info_get0_EMBEDDED_buffer(result);
1093	data = (unsigned char *)new_mem->data;
1094	len = new_mem->length;
1095	OPENSSL_free(result);
1096	result = NULL;
1097	goto again;
1098	}
1099
1100	if (result != NULL)
1101	ERR_clear_error();
1102
1103	return result;
1104	}
1105
1106	static OSSL_STORE_INFO file_load_try_repeat(OSSL_STORE_LOADER_CTX ctx,
1107	const UI_METHOD *ui_method,
1108	void *ui_data)
1109	{
1110	OSSL_STORE_INFO *result = NULL;
1111	int try_matchcount = 0;
1112
1113	if (ctx->_.file.last_handler != NULL) {
1114	result =
1115	ctx->_.file.last_handler->try_decode(NULL, NULL, NULL, 0,
1116	&ctx->_.file.last_handler_ctx,
1117	&try_matchcount,
1118	ui_method, ui_data);
1119
1120	if (result == NULL) {
1121	ctx->_.file.last_handler->destroy_ctx(&ctx->_.file.last_handler_ctx);
1122	ctx->_.file.last_handler_ctx = NULL;
1123	ctx->_.file.last_handler = NULL;
1124	}
1125	}
1126	return result;
1127	}
1128
1129	static void pem_free_flag(void *pem_data, int secure, size_t num)
1130	{
1131	if (secure)
1132	OPENSSL_secure_clear_free(pem_data, num);
1133	else
1134	OPENSSL_free(pem_data);
1135	}
1136	static int file_read_pem(BIO bp, char pem_name, char *pem_header,
1137	unsigned char *data, long len,
1138	const UI_METHOD *ui_method,
1139	void *ui_data, int secure)
1140	{
1141	int i = secure
1142	? PEM_read_bio_ex(bp, pem_name, pem_header, data, len,
1143	PEM_FLAG_SECURE \| PEM_FLAG_EAY_COMPATIBLE)
1144	: PEM_read_bio(bp, pem_name, pem_header, data, len);
1145
1146	if (i <= 0)
1147	return 0;
1148
1149	/*
1150	* 10 is the number of characters in "Proc-Type:", which
1151	* PEM_get_EVP_CIPHER_INFO() requires to be present.
1152	* If the PEM header has less characters than that, it's
1153	* not worth spending cycles on it.
1154	*/
1155	if (strlen(*pem_header) > 10) {
1156	EVP_CIPHER_INFO cipher;
1157	struct pem_pass_data pass_data;
1158
1159	if (!PEM_get_EVP_CIPHER_INFO(*pem_header, &cipher)
1160	\|\| !file_fill_pem_pass_data(&pass_data, "PEM", ui_method, ui_data)
1161	\|\| !PEM_do_header(&cipher, *data, len, file_get_pem_pass,
1162	&pass_data)) {
1163	return 0;
1164	}
1165	}
1166	return 1;
1167	}
1168
1169	static int file_read_asn1(BIO bp, unsigned char data, long len)
1170	{
1171	BUF_MEM *mem = NULL;
1172
1173	if (asn1_d2i_read_bio(bp, &mem) < 0)
1174	return 0;
1175
1176	data = (unsigned char )mem->data;
1177	*len = (long)mem->length;
1178	OPENSSL_free(mem);
1179
1180	return 1;
1181	}
1182
1183	static int ends_with_dirsep(const char *uri)
1184	{
1185	if (*uri != '\0')
1186	uri += strlen(uri) - 1;
1187	#if defined __VMS
1188	if (uri == ']' \|\| uri == '>' \|\| *uri == ':')
1189	return 1;
1190	#elif defined _WIN32
1191	if (*uri == '\\')
1192	return 1;
1193	#endif
1194	return *uri == '/';
1195	}
1196
1197	static int file_name_to_uri(OSSL_STORE_LOADER_CTX ctx, const char name,
1198	char **data)
1199	{
1200	assert(name != NULL);
1201	assert(data != NULL);
1202	{
1203	const char *pathsep = ends_with_dirsep(ctx->_.dir.uri) ? "" : "/";
1204	long calculated_length = strlen(ctx->_.dir.uri) + strlen(pathsep)
1205	+ strlen(name) + 1 /* \0 */;
1206
1207	*data = OPENSSL_zalloc(calculated_length);
1208	if (*data == NULL) {
1209	OSSL_STOREerr(OSSL_STORE_F_FILE_NAME_TO_URI, ERR_R_MALLOC_FAILURE);
1210	return 0;
1211	}
1212
1213	OPENSSL_strlcat(*data, ctx->_.dir.uri, calculated_length);
1214	OPENSSL_strlcat(*data, pathsep, calculated_length);
1215	OPENSSL_strlcat(*data, name, calculated_length);
1216	}
1217	return 1;
1218	}
1219
1220	static int file_name_check(OSSL_STORE_LOADER_CTX ctx, const char name)
1221	{
1222	const char *p = NULL;
1223
1224	/* If there are no search criteria, all names are accepted */
1225	if (ctx->_.dir.search_name[0] == '\0')
1226	return 1;
1227
1228	/* If the expected type isn't supported, no name is accepted */
1229	if (ctx->expected_type != 0
1230	&& ctx->expected_type != OSSL_STORE_INFO_CERT
1231	&& ctx->expected_type != OSSL_STORE_INFO_CRL)
1232	return 0;
1233
1234	/*
1235	* First, check the basename
1236	*/
1237	if (strncasecmp(name, ctx->_.dir.search_name,
1238	sizeof(ctx->_.dir.search_name) - 1) != 0
1239	\|\| name[sizeof(ctx->_.dir.search_name) - 1] != '.')
1240	return 0;
1241	p = &name[sizeof(ctx->_.dir.search_name)];
1242
1243	/*
1244	* Then, if the expected type is a CRL, check that the extension starts
1245	* with 'r'
1246	*/
1247	if (*p == 'r') {
1248	p++;
1249	if (ctx->expected_type != 0
1250	&& ctx->expected_type != OSSL_STORE_INFO_CRL)
1251	return 0;
1252	} else if (ctx->expected_type == OSSL_STORE_INFO_CRL) {
1253	return 0;
1254	}
1255
1256	/*
1257	* Last, check that the rest of the extension is a decimal number, at
1258	* least one digit long.
1259	*/
1260	if (!ossl_isdigit(*p))
1261	return 0;
1262	while (ossl_isdigit(*p))
1263	p++;
1264
1265	# ifdef __VMS
1266	/*
1267	* One extra step here, check for a possible generation number.
1268	*/
1269	if (*p == ';')
1270	for (p++; *p != '\0'; p++)
1271	if (!ossl_isdigit(*p))
1272	break;
1273	# endif
1274
1275	/*
1276	* If we've reached the end of the string at this point, we've successfully
1277	* found a fitting file name.
1278	*/
1279	return *p == '\0';
1280	}
1281
1282	static int file_eof(OSSL_STORE_LOADER_CTX *ctx);
1283	static int file_error(OSSL_STORE_LOADER_CTX *ctx);
1284	static OSSL_STORE_INFO file_load(OSSL_STORE_LOADER_CTX ctx,
1285	const UI_METHOD ui_method, void ui_data)
1286	{
1287	OSSL_STORE_INFO *result = NULL;
1288
1289	ctx->errcnt = 0;
1290	ERR_clear_error();
1291
1292	if (ctx->type == is_dir) {
1293	do {
1294	char *newname = NULL;
1295
1296	if (ctx->_.dir.last_entry == NULL) {
1297	if (!ctx->_.dir.end_reached) {
1298	char errbuf[256];
1299	assert(ctx->_.dir.last_errno != 0);
1300	OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD, ERR_R_SYS_LIB);
1301	errno = ctx->_.dir.last_errno;
1302	ctx->errcnt++;
1303	if (openssl_strerror_r(errno, errbuf, sizeof(errbuf)))
1304	ERR_add_error_data(1, errbuf);
1305	}
1306	return NULL;
1307	}
1308
1309	if (ctx->_.dir.last_entry[0] != '.'
1310	&& file_name_check(ctx, ctx->_.dir.last_entry)
1311	&& !file_name_to_uri(ctx, ctx->_.dir.last_entry, &newname))
1312	return NULL;
1313
1314	/*
1315	* On the first call (with a NULL context), OPENSSL_DIR_read()
1316	* cares about the second argument. On the following calls, it
1317	* only cares that it isn't NULL. Therefore, we can safely give
1318	* it our URI here.
1319	*/
1320	ctx->_.dir.last_entry = OPENSSL_DIR_read(&ctx->_.dir.ctx,
1321	ctx->_.dir.uri);
1322	ctx->_.dir.last_errno = errno;
1323	if (ctx->_.dir.last_entry == NULL && ctx->_.dir.last_errno == 0)
1324	ctx->_.dir.end_reached = 1;
1325
1326	if (newname != NULL
1327	&& (result = OSSL_STORE_INFO_new_NAME(newname)) == NULL) {
1328	OPENSSL_free(newname);
1329	OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD, ERR_R_OSSL_STORE_LIB);
1330	return NULL;
1331	}
1332	} while (result == NULL && !file_eof(ctx));
1333	} else {
1334	int matchcount = -1;
1335
1336	again:
1337	result = file_load_try_repeat(ctx, ui_method, ui_data);
1338	if (result != NULL)
1339	return result;
1340
1341	if (file_eof(ctx))
1342	return NULL;
1343
1344	do {
1345	char pem_name = NULL; / PEM record name */
1346	char pem_header = NULL; / PEM record header */
1347	unsigned char data = NULL; / DER encoded data */
1348	long len = 0; /* DER encoded data length */
1349
1350	matchcount = -1;
1351	if (ctx->type == is_pem) {
1352	if (!file_read_pem(ctx->_.file.file, &pem_name, &pem_header,
1353	&data, &len, ui_method, ui_data,
1354	(ctx->flags & FILE_FLAG_SECMEM) != 0)) {
1355	ctx->errcnt++;
1356	goto endloop;
1357	}
1358	} else {
1359	if (!file_read_asn1(ctx->_.file.file, &data, &len)) {
1360	ctx->errcnt++;
1361	goto endloop;
1362	}
1363	}
1364
1365	result = file_load_try_decode(ctx, pem_name, pem_header, data, len,
1366	ui_method, ui_data, &matchcount);
1367
1368	if (result != NULL)
1369	goto endloop;
1370
1371	/*
1372	* If a PEM name matches more than one handler, the handlers are
1373	* badly coded.
1374	*/
1375	if (!ossl_assert(pem_name == NULL \|\| matchcount <= 1)) {
1376	ctx->errcnt++;
1377	goto endloop;
1378	}
1379
1380	if (matchcount > 1) {
1381	OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD,
1382	OSSL_STORE_R_AMBIGUOUS_CONTENT_TYPE);
1383	} else if (matchcount == 1) {
1384	/*
1385	* If there are other errors on the stack, they already show
1386	* what the problem is.
1387	*/
1388	if (ERR_peek_error() == 0) {
1389	OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD,
1390	OSSL_STORE_R_UNSUPPORTED_CONTENT_TYPE);
1391	if (pem_name != NULL)
1392	ERR_add_error_data(3, "PEM type is '", pem_name, "'");
1393	}
1394	}
1395	if (matchcount > 0)
1396	ctx->errcnt++;
1397
1398	endloop:
1399	pem_free_flag(pem_name, (ctx->flags & FILE_FLAG_SECMEM) != 0, 0);
1400	pem_free_flag(pem_header, (ctx->flags & FILE_FLAG_SECMEM) != 0, 0);
1401	pem_free_flag(data, (ctx->flags & FILE_FLAG_SECMEM) != 0, len);
1402	} while (matchcount == 0 && !file_eof(ctx) && !file_error(ctx));
1403
1404	/* We bail out on ambiguity */
1405	if (matchcount > 1)
1406	return NULL;
1407
1408	if (result != NULL
1409	&& ctx->expected_type != 0
1410	&& ctx->expected_type != OSSL_STORE_INFO_get_type(result)) {
1411	OSSL_STORE_INFO_free(result);
1412	goto again;
1413	}
1414	}
1415
1416	return result;
1417	}
1418
1419	static int file_error(OSSL_STORE_LOADER_CTX *ctx)
1420	{
1421	return ctx->errcnt > 0;
1422	}
1423
1424	static int file_eof(OSSL_STORE_LOADER_CTX *ctx)
1425	{
1426	if (ctx->type == is_dir)
1427	return ctx->_.dir.end_reached;
1428
1429	if (ctx->_.file.last_handler != NULL
1430	&& !ctx->_.file.last_handler->eof(ctx->_.file.last_handler_ctx))
1431	return 0;
1432	return BIO_eof(ctx->_.file.file);
1433	}
1434
1435	static int file_close(OSSL_STORE_LOADER_CTX *ctx)
1436	{
1437	if (ctx->type == is_dir) {
1438	OPENSSL_DIR_end(&ctx->_.dir.ctx);
1439	} else {
1440	BIO_free_all(ctx->_.file.file);
1441	}
1442	OSSL_STORE_LOADER_CTX_free(ctx);
1443	return 1;
1444	}
1445
1446	int ossl_store_file_detach_pem_bio_int(OSSL_STORE_LOADER_CTX *ctx)
1447	{
1448	OSSL_STORE_LOADER_CTX_free(ctx);
1449	return 1;
1450	}
1451
1452	static OSSL_STORE_LOADER file_loader =
1453	{
1454	"file",
1455	NULL,
1456	file_open,
1457	file_ctrl,
1458	file_expect,
1459	file_find,
1460	file_load,
1461	file_eof,
1462	file_error,
1463	file_close
1464	};
1465
1466	static void store_file_loader_deinit(void)
1467	{
1468	ossl_store_unregister_loader_int(file_loader.scheme);
1469	}
1470
1471	int ossl_store_file_loader_init(void)
1472	{
1473	int ret = ossl_store_register_loader_int(&file_loader);
1474
1475	OPENSSL_atexit(store_file_loader_deinit);
1476	return ret;
1477	}

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source: vbox/trunk/src/libs/openssl-1.1.1l/crypto/store/loader_file.c@ 91772

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