ts_rsp_sign.c@ 69890

Last change on this file since 69890 was 69890, checked in by vboxsync, 7 years ago
Added OpenSSL 1.1.0g with unneeded files removed, otherwise unmodified. bugref:8070: src/libs maintenance
Property svn:eol-style set to `native`
File size: 27.4 KB

Line
1	/*
2	* Copyright 2006-2016 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 "internal/cryptlib.h"
11
12	#if defined(OPENSSL_SYS_UNIX)
13	# include <sys/time.h>
14	#endif
15
16	#include <openssl/objects.h>
17	#include <openssl/ts.h>
18	#include <openssl/pkcs7.h>
19	#include "ts_lcl.h"
20
21	static ASN1_INTEGER def_serial_cb(struct TS_resp_ctx , void *);
22	static int def_time_cb(struct TS_resp_ctx , void , long sec, long usec);
23	static int def_extension_cb(struct TS_resp_ctx , X509_EXTENSION , void *);
24
25	static void ts_RESP_CTX_init(TS_RESP_CTX *ctx);
26	static void ts_RESP_CTX_cleanup(TS_RESP_CTX *ctx);
27	static int ts_RESP_check_request(TS_RESP_CTX *ctx);
28	static ASN1_OBJECT ts_RESP_get_policy(TS_RESP_CTX ctx);
29	static TS_TST_INFO ts_RESP_create_tst_info(TS_RESP_CTX ctx,
30	ASN1_OBJECT *policy);
31	static int ts_RESP_process_extensions(TS_RESP_CTX *ctx);
32	static int ts_RESP_sign(TS_RESP_CTX *ctx);
33
34	static ESS_SIGNING_CERT ess_SIGNING_CERT_new_init(X509 signcert,
35	STACK_OF(X509) *certs);
36	static ESS_CERT_ID ess_CERT_ID_new_init(X509 cert, int issuer_needed);
37	static int ts_TST_INFO_content_new(PKCS7 *p7);
38	static int ESS_add_signing_cert(PKCS7_SIGNER_INFO si, ESS_SIGNING_CERT sc);
39
40	static ASN1_GENERALIZEDTIME
41	TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME , long, long,
42	unsigned);
43
44	/* Default callback for response generation. */
45	static ASN1_INTEGER def_serial_cb(struct TS_resp_ctx ctx, void *data)
46	{
47	ASN1_INTEGER *serial = ASN1_INTEGER_new();
48
49	if (serial == NULL)
50	goto err;
51	if (!ASN1_INTEGER_set(serial, 1))
52	goto err;
53	return serial;
54
55	err:
56	TSerr(TS_F_DEF_SERIAL_CB, ERR_R_MALLOC_FAILURE);
57	TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
58	"Error during serial number generation.");
59	return NULL;
60	}
61
62	#if defined(OPENSSL_SYS_UNIX)
63
64	static int def_time_cb(struct TS_resp_ctx ctx, void data,
65	long sec, long usec)
66	{
67	struct timeval tv;
68	if (gettimeofday(&tv, NULL) != 0) {
69	TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
70	TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
71	"Time is not available.");
72	TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
73	return 0;
74	}
75	*sec = tv.tv_sec;
76	*usec = tv.tv_usec;
77
78	return 1;
79	}
80
81	#else
82
83	static int def_time_cb(struct TS_resp_ctx ctx, void data,
84	long sec, long usec)
85	{
86	time_t t;
87	if (time(&t) == (time_t)-1) {
88	TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
89	TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
90	"Time is not available.");
91	TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
92	return 0;
93	}
94	*sec = (long)t;
95	*usec = 0;
96
97	return 1;
98	}
99
100	#endif
101
102	static int def_extension_cb(struct TS_resp_ctx ctx, X509_EXTENSION ext,
103	void *data)
104	{
105	TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
106	"Unsupported extension.");
107	TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_EXTENSION);
108	return 0;
109	}
110
111	/* TS_RESP_CTX management functions. */
112
113	TS_RESP_CTX *TS_RESP_CTX_new()
114	{
115	TS_RESP_CTX *ctx;
116
117	if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL) {
118	TSerr(TS_F_TS_RESP_CTX_NEW, ERR_R_MALLOC_FAILURE);
119	return NULL;
120	}
121
122	ctx->signer_md = EVP_sha256();
123
124	ctx->serial_cb = def_serial_cb;
125	ctx->time_cb = def_time_cb;
126	ctx->extension_cb = def_extension_cb;
127
128	return ctx;
129	}
130
131	void TS_RESP_CTX_free(TS_RESP_CTX *ctx)
132	{
133	if (!ctx)
134	return;
135
136	X509_free(ctx->signer_cert);
137	EVP_PKEY_free(ctx->signer_key);
138	sk_X509_pop_free(ctx->certs, X509_free);
139	sk_ASN1_OBJECT_pop_free(ctx->policies, ASN1_OBJECT_free);
140	ASN1_OBJECT_free(ctx->default_policy);
141	sk_EVP_MD_free(ctx->mds); /* No EVP_MD_free method exists. */
142	ASN1_INTEGER_free(ctx->seconds);
143	ASN1_INTEGER_free(ctx->millis);
144	ASN1_INTEGER_free(ctx->micros);
145	OPENSSL_free(ctx);
146	}
147
148	int TS_RESP_CTX_set_signer_cert(TS_RESP_CTX ctx, X509 signer)
149	{
150	if (X509_check_purpose(signer, X509_PURPOSE_TIMESTAMP_SIGN, 0) != 1) {
151	TSerr(TS_F_TS_RESP_CTX_SET_SIGNER_CERT,
152	TS_R_INVALID_SIGNER_CERTIFICATE_PURPOSE);
153	return 0;
154	}
155	X509_free(ctx->signer_cert);
156	ctx->signer_cert = signer;
157	X509_up_ref(ctx->signer_cert);
158	return 1;
159	}
160
161	int TS_RESP_CTX_set_signer_key(TS_RESP_CTX ctx, EVP_PKEY key)
162	{
163	EVP_PKEY_free(ctx->signer_key);
164	ctx->signer_key = key;
165	EVP_PKEY_up_ref(ctx->signer_key);
166
167	return 1;
168	}
169
170	int TS_RESP_CTX_set_signer_digest(TS_RESP_CTX ctx, const EVP_MD md)
171	{
172	ctx->signer_md = md;
173	return 1;
174	}
175
176	int TS_RESP_CTX_set_def_policy(TS_RESP_CTX ctx, const ASN1_OBJECT def_policy)
177	{
178	ASN1_OBJECT_free(ctx->default_policy);
179	if ((ctx->default_policy = OBJ_dup(def_policy)) == NULL)
180	goto err;
181	return 1;
182	err:
183	TSerr(TS_F_TS_RESP_CTX_SET_DEF_POLICY, ERR_R_MALLOC_FAILURE);
184	return 0;
185	}
186
187	int TS_RESP_CTX_set_certs(TS_RESP_CTX ctx, STACK_OF(X509) certs)
188	{
189
190	sk_X509_pop_free(ctx->certs, X509_free);
191	ctx->certs = NULL;
192	if (!certs)
193	return 1;
194	if ((ctx->certs = X509_chain_up_ref(certs)) == NULL) {
195	TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE);
196	return 0;
197	}
198
199	return 1;
200	}
201
202	int TS_RESP_CTX_add_policy(TS_RESP_CTX ctx, const ASN1_OBJECT policy)
203	{
204	ASN1_OBJECT *copy = NULL;
205
206	if (ctx->policies == NULL
207	&& (ctx->policies = sk_ASN1_OBJECT_new_null()) == NULL)
208	goto err;
209	if ((copy = OBJ_dup(policy)) == NULL)
210	goto err;
211	if (!sk_ASN1_OBJECT_push(ctx->policies, copy))
212	goto err;
213
214	return 1;
215	err:
216	TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE);
217	ASN1_OBJECT_free(copy);
218	return 0;
219	}
220
221	int TS_RESP_CTX_add_md(TS_RESP_CTX ctx, const EVP_MD md)
222	{
223	if (ctx->mds == NULL
224	&& (ctx->mds = sk_EVP_MD_new_null()) == NULL)
225	goto err;
226	if (!sk_EVP_MD_push(ctx->mds, md))
227	goto err;
228
229	return 1;
230	err:
231	TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE);
232	return 0;
233	}
234
235	#define TS_RESP_CTX_accuracy_free(ctx) \
236	ASN1_INTEGER_free(ctx->seconds); \
237	ctx->seconds = NULL; \
238	ASN1_INTEGER_free(ctx->millis); \
239	ctx->millis = NULL; \
240	ASN1_INTEGER_free(ctx->micros); \
241	ctx->micros = NULL;
242
243	int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx,
244	int secs, int millis, int micros)
245	{
246
247	TS_RESP_CTX_accuracy_free(ctx);
248	if (secs
249	&& ((ctx->seconds = ASN1_INTEGER_new()) == NULL
250	\|\| !ASN1_INTEGER_set(ctx->seconds, secs)))
251	goto err;
252	if (millis
253	&& ((ctx->millis = ASN1_INTEGER_new()) == NULL
254	\|\| !ASN1_INTEGER_set(ctx->millis, millis)))
255	goto err;
256	if (micros
257	&& ((ctx->micros = ASN1_INTEGER_new()) == NULL
258	\|\| !ASN1_INTEGER_set(ctx->micros, micros)))
259	goto err;
260
261	return 1;
262	err:
263	TS_RESP_CTX_accuracy_free(ctx);
264	TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE);
265	return 0;
266	}
267
268	void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags)
269	{
270	ctx->flags \|= flags;
271	}
272
273	void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX ctx, TS_serial_cb cb, void data)
274	{
275	ctx->serial_cb = cb;
276	ctx->serial_cb_data = data;
277	}
278
279	void TS_RESP_CTX_set_time_cb(TS_RESP_CTX ctx, TS_time_cb cb, void data)
280	{
281	ctx->time_cb = cb;
282	ctx->time_cb_data = data;
283	}
284
285	void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx,
286	TS_extension_cb cb, void *data)
287	{
288	ctx->extension_cb = cb;
289	ctx->extension_cb_data = data;
290	}
291
292	int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx,
293	int status, const char *text)
294	{
295	TS_STATUS_INFO *si = NULL;
296	ASN1_UTF8STRING *utf8_text = NULL;
297	int ret = 0;
298
299	if ((si = TS_STATUS_INFO_new()) == NULL)
300	goto err;
301	if (!ASN1_INTEGER_set(si->status, status))
302	goto err;
303	if (text) {
304	if ((utf8_text = ASN1_UTF8STRING_new()) == NULL
305	\|\| !ASN1_STRING_set(utf8_text, text, strlen(text)))
306	goto err;
307	if (si->text == NULL
308	&& (si->text = sk_ASN1_UTF8STRING_new_null()) == NULL)
309	goto err;
310	if (!sk_ASN1_UTF8STRING_push(si->text, utf8_text))
311	goto err;
312	utf8_text = NULL; /* Ownership is lost. */
313	}
314	if (!TS_RESP_set_status_info(ctx->response, si))
315	goto err;
316	ret = 1;
317	err:
318	if (!ret)
319	TSerr(TS_F_TS_RESP_CTX_SET_STATUS_INFO, ERR_R_MALLOC_FAILURE);
320	TS_STATUS_INFO_free(si);
321	ASN1_UTF8STRING_free(utf8_text);
322	return ret;
323	}
324
325	int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX *ctx,
326	int status, const char *text)
327	{
328	int ret = 1;
329	TS_STATUS_INFO *si = ctx->response->status_info;
330
331	if (ASN1_INTEGER_get(si->status) == TS_STATUS_GRANTED) {
332	ret = TS_RESP_CTX_set_status_info(ctx, status, text);
333	}
334	return ret;
335	}
336
337	int TS_RESP_CTX_add_failure_info(TS_RESP_CTX *ctx, int failure)
338	{
339	TS_STATUS_INFO *si = ctx->response->status_info;
340	if (si->failure_info == NULL
341	&& (si->failure_info = ASN1_BIT_STRING_new()) == NULL)
342	goto err;
343	if (!ASN1_BIT_STRING_set_bit(si->failure_info, failure, 1))
344	goto err;
345	return 1;
346	err:
347	TSerr(TS_F_TS_RESP_CTX_ADD_FAILURE_INFO, ERR_R_MALLOC_FAILURE);
348	return 0;
349	}
350
351	TS_REQ TS_RESP_CTX_get_request(TS_RESP_CTX ctx)
352	{
353	return ctx->request;
354	}
355
356	TS_TST_INFO TS_RESP_CTX_get_tst_info(TS_RESP_CTX ctx)
357	{
358	return ctx->tst_info;
359	}
360
361	int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX *ctx,
362	unsigned precision)
363	{
364	if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
365	return 0;
366	ctx->clock_precision_digits = precision;
367	return 1;
368	}
369
370	/* Main entry method of the response generation. */
371	TS_RESP TS_RESP_create_response(TS_RESP_CTX ctx, BIO *req_bio)
372	{
373	ASN1_OBJECT *policy;
374	TS_RESP *response;
375	int result = 0;
376
377	ts_RESP_CTX_init(ctx);
378
379	if ((ctx->response = TS_RESP_new()) == NULL) {
380	TSerr(TS_F_TS_RESP_CREATE_RESPONSE, ERR_R_MALLOC_FAILURE);
381	goto end;
382	}
383	if ((ctx->request = d2i_TS_REQ_bio(req_bio, NULL)) == NULL) {
384	TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
385	"Bad request format or system error.");
386	TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
387	goto end;
388	}
389	if (!TS_RESP_CTX_set_status_info(ctx, TS_STATUS_GRANTED, NULL))
390	goto end;
391	if (!ts_RESP_check_request(ctx))
392	goto end;
393	if ((policy = ts_RESP_get_policy(ctx)) == NULL)
394	goto end;
395	if ((ctx->tst_info = ts_RESP_create_tst_info(ctx, policy)) == NULL)
396	goto end;
397	if (!ts_RESP_process_extensions(ctx))
398	goto end;
399	if (!ts_RESP_sign(ctx))
400	goto end;
401	result = 1;
402
403	end:
404	if (!result) {
405	TSerr(TS_F_TS_RESP_CREATE_RESPONSE, TS_R_RESPONSE_SETUP_ERROR);
406	if (ctx->response != NULL) {
407	if (TS_RESP_CTX_set_status_info_cond(ctx,
408	TS_STATUS_REJECTION,
409	"Error during response "
410	"generation.") == 0) {
411	TS_RESP_free(ctx->response);
412	ctx->response = NULL;
413	}
414	}
415	}
416	response = ctx->response;
417	ctx->response = NULL; /* Ownership will be returned to caller. */
418	ts_RESP_CTX_cleanup(ctx);
419	return response;
420	}
421
422	/* Initializes the variable part of the context. */
423	static void ts_RESP_CTX_init(TS_RESP_CTX *ctx)
424	{
425	ctx->request = NULL;
426	ctx->response = NULL;
427	ctx->tst_info = NULL;
428	}
429
430	/* Cleans up the variable part of the context. */
431	static void ts_RESP_CTX_cleanup(TS_RESP_CTX *ctx)
432	{
433	TS_REQ_free(ctx->request);
434	ctx->request = NULL;
435	TS_RESP_free(ctx->response);
436	ctx->response = NULL;
437	TS_TST_INFO_free(ctx->tst_info);
438	ctx->tst_info = NULL;
439	}
440
441	/* Checks the format and content of the request. */
442	static int ts_RESP_check_request(TS_RESP_CTX *ctx)
443	{
444	TS_REQ *request = ctx->request;
445	TS_MSG_IMPRINT *msg_imprint;
446	X509_ALGOR *md_alg;
447	int md_alg_id;
448	const ASN1_OCTET_STRING *digest;
449	const EVP_MD *md = NULL;
450	int i;
451
452	if (TS_REQ_get_version(request) != 1) {
453	TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
454	"Bad request version.");
455	TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_REQUEST);
456	return 0;
457	}
458
459	msg_imprint = request->msg_imprint;
460	md_alg = msg_imprint->hash_algo;
461	md_alg_id = OBJ_obj2nid(md_alg->algorithm);
462	for (i = 0; !md && i < sk_EVP_MD_num(ctx->mds); ++i) {
463	const EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i);
464	if (md_alg_id == EVP_MD_type(current_md))
465	md = current_md;
466	}
467	if (!md) {
468	TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
469	"Message digest algorithm is "
470	"not supported.");
471	TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
472	return 0;
473	}
474
475	if (md_alg->parameter && ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL) {
476	TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
477	"Superfluous message digest "
478	"parameter.");
479	TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
480	return 0;
481	}
482	digest = msg_imprint->hashed_msg;
483	if (digest->length != EVP_MD_size(md)) {
484	TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
485	"Bad message digest.");
486	TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
487	return 0;
488	}
489
490	return 1;
491	}
492
493	/* Returns the TSA policy based on the requested and acceptable policies. */
494	static ASN1_OBJECT ts_RESP_get_policy(TS_RESP_CTX ctx)
495	{
496	ASN1_OBJECT *requested = ctx->request->policy_id;
497	ASN1_OBJECT *policy = NULL;
498	int i;
499
500	if (ctx->default_policy == NULL) {
501	TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_INVALID_NULL_POINTER);
502	return NULL;
503	}
504	if (!requested \|\| !OBJ_cmp(requested, ctx->default_policy))
505	policy = ctx->default_policy;
506
507	/* Check if the policy is acceptable. */
508	for (i = 0; !policy && i < sk_ASN1_OBJECT_num(ctx->policies); ++i) {
509	ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i);
510	if (!OBJ_cmp(requested, current))
511	policy = current;
512	}
513	if (!policy) {
514	TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_UNACCEPTABLE_POLICY);
515	TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
516	"Requested policy is not " "supported.");
517	TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY);
518	}
519	return policy;
520	}
521
522	/* Creates the TS_TST_INFO object based on the settings of the context. */
523	static TS_TST_INFO ts_RESP_create_tst_info(TS_RESP_CTX ctx,
524	ASN1_OBJECT *policy)
525	{
526	int result = 0;
527	TS_TST_INFO *tst_info = NULL;
528	ASN1_INTEGER *serial = NULL;
529	ASN1_GENERALIZEDTIME *asn1_time = NULL;
530	long sec, usec;
531	TS_ACCURACY *accuracy = NULL;
532	const ASN1_INTEGER *nonce;
533	GENERAL_NAME *tsa_name = NULL;
534
535	if ((tst_info = TS_TST_INFO_new()) == NULL)
536	goto end;
537	if (!TS_TST_INFO_set_version(tst_info, 1))
538	goto end;
539	if (!TS_TST_INFO_set_policy_id(tst_info, policy))
540	goto end;
541	if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint))
542	goto end;
543	if ((serial = ctx->serial_cb(ctx, ctx->serial_cb_data)) == NULL
544	\|\| !TS_TST_INFO_set_serial(tst_info, serial))
545	goto end;
546	if (!ctx->time_cb(ctx, ctx->time_cb_data, &sec, &usec)
547	\|\| (asn1_time =
548	TS_RESP_set_genTime_with_precision(NULL, sec, usec,
549	ctx->clock_precision_digits)) == NULL
550	\|\| !TS_TST_INFO_set_time(tst_info, asn1_time))
551	goto end;
552
553	if ((ctx->seconds \|\| ctx->millis \|\| ctx->micros)
554	&& (accuracy = TS_ACCURACY_new()) == NULL)
555	goto end;
556	if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds))
557	goto end;
558	if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis))
559	goto end;
560	if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros))
561	goto end;
562	if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy))
563	goto end;
564
565	if ((ctx->flags & TS_ORDERING)
566	&& !TS_TST_INFO_set_ordering(tst_info, 1))
567	goto end;
568
569	if ((nonce = ctx->request->nonce) != NULL
570	&& !TS_TST_INFO_set_nonce(tst_info, nonce))
571	goto end;
572
573	if (ctx->flags & TS_TSA_NAME) {
574	if ((tsa_name = GENERAL_NAME_new()) == NULL)
575	goto end;
576	tsa_name->type = GEN_DIRNAME;
577	tsa_name->d.dirn =
578	X509_NAME_dup(X509_get_subject_name(ctx->signer_cert));
579	if (!tsa_name->d.dirn)
580	goto end;
581	if (!TS_TST_INFO_set_tsa(tst_info, tsa_name))
582	goto end;
583	}
584
585	result = 1;
586	end:
587	if (!result) {
588	TS_TST_INFO_free(tst_info);
589	tst_info = NULL;
590	TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR);
591	TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
592	"Error during TSTInfo "
593	"generation.");
594	}
595	GENERAL_NAME_free(tsa_name);
596	TS_ACCURACY_free(accuracy);
597	ASN1_GENERALIZEDTIME_free(asn1_time);
598	ASN1_INTEGER_free(serial);
599
600	return tst_info;
601	}
602
603	/* Processing the extensions of the request. */
604	static int ts_RESP_process_extensions(TS_RESP_CTX *ctx)
605	{
606	STACK_OF(X509_EXTENSION) *exts = ctx->request->extensions;
607	int i;
608	int ok = 1;
609
610	for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i) {
611	X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
612	/*
613	* The last argument was previously (void *)ctx->extension_cb,
614	* but ISO C doesn't permit converting a function pointer to void *.
615	* For lack of better information, I'm placing a NULL there instead.
616	* The callback can pick its own address out from the ctx anyway...
617	*/
618	ok = (*ctx->extension_cb) (ctx, ext, NULL);
619	}
620
621	return ok;
622	}
623
624	/* Functions for signing the TS_TST_INFO structure of the context. */
625	static int ts_RESP_sign(TS_RESP_CTX *ctx)
626	{
627	int ret = 0;
628	PKCS7 *p7 = NULL;
629	PKCS7_SIGNER_INFO *si;
630	STACK_OF(X509) certs; / Certificates to include in sc. */
631	ESS_SIGNING_CERT *sc = NULL;
632	ASN1_OBJECT *oid;
633	BIO *p7bio = NULL;
634	int i;
635
636	if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) {
637	TSerr(TS_F_TS_RESP_SIGN, TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
638	goto err;
639	}
640
641	if ((p7 = PKCS7_new()) == NULL) {
642	TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
643	goto err;
644	}
645	if (!PKCS7_set_type(p7, NID_pkcs7_signed))
646	goto err;
647	if (!ASN1_INTEGER_set(p7->d.sign->version, 3))
648	goto err;
649
650	if (ctx->request->cert_req) {
651	PKCS7_add_certificate(p7, ctx->signer_cert);
652	if (ctx->certs) {
653	for (i = 0; i < sk_X509_num(ctx->certs); ++i) {
654	X509 *cert = sk_X509_value(ctx->certs, i);
655	PKCS7_add_certificate(p7, cert);
656	}
657	}
658	}
659
660	if ((si = PKCS7_add_signature(p7, ctx->signer_cert,
661	ctx->signer_key, ctx->signer_md)) == NULL) {
662	TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR);
663	goto err;
664	}
665
666	oid = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
667	if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
668	V_ASN1_OBJECT, oid)) {
669	TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR);
670	goto err;
671	}
672
673	certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL;
674	if ((sc = ess_SIGNING_CERT_new_init(ctx->signer_cert, certs)) == NULL)
675	goto err;
676	if (!ESS_add_signing_cert(si, sc)) {
677	TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR);
678	goto err;
679	}
680
681	if (!ts_TST_INFO_content_new(p7))
682	goto err;
683	if ((p7bio = PKCS7_dataInit(p7, NULL)) == NULL) {
684	TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
685	goto err;
686	}
687	if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info)) {
688	TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
689	goto err;
690	}
691	if (!PKCS7_dataFinal(p7, p7bio)) {
692	TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
693	goto err;
694	}
695	TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info);
696	p7 = NULL; /* Ownership is lost. */
697	ctx->tst_info = NULL; /* Ownership is lost. */
698
699	ret = 1;
700	err:
701	if (!ret)
702	TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
703	"Error during signature "
704	"generation.");
705	BIO_free_all(p7bio);
706	ESS_SIGNING_CERT_free(sc);
707	PKCS7_free(p7);
708	return ret;
709	}
710
711	static ESS_SIGNING_CERT ess_SIGNING_CERT_new_init(X509 signcert,
712	STACK_OF(X509) *certs)
713	{
714	ESS_CERT_ID *cid;
715	ESS_SIGNING_CERT *sc = NULL;
716	int i;
717
718	if ((sc = ESS_SIGNING_CERT_new()) == NULL)
719	goto err;
720	if (sc->cert_ids == NULL
721	&& (sc->cert_ids = sk_ESS_CERT_ID_new_null()) == NULL)
722	goto err;
723
724	if ((cid = ess_CERT_ID_new_init(signcert, 0)) == NULL
725	\|\| !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
726	goto err;
727	for (i = 0; i < sk_X509_num(certs); ++i) {
728	X509 *cert = sk_X509_value(certs, i);
729	if ((cid = ess_CERT_ID_new_init(cert, 1)) == NULL
730	\|\| !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
731	goto err;
732	}
733
734	return sc;
735	err:
736	ESS_SIGNING_CERT_free(sc);
737	TSerr(TS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE);
738	return NULL;
739	}
740
741	static ESS_CERT_ID ess_CERT_ID_new_init(X509 cert, int issuer_needed)
742	{
743	ESS_CERT_ID *cid = NULL;
744	GENERAL_NAME *name = NULL;
745	unsigned char cert_sha1[SHA_DIGEST_LENGTH];
746
747	/* Call for side-effect of computing hash and caching extensions */
748	X509_check_purpose(cert, -1, 0);
749	if ((cid = ESS_CERT_ID_new()) == NULL)
750	goto err;
751	X509_digest(cert, EVP_sha1(), cert_sha1, NULL);
752	if (!ASN1_OCTET_STRING_set(cid->hash, cert_sha1, SHA_DIGEST_LENGTH))
753	goto err;
754
755	/* Setting the issuer/serial if requested. */
756	if (issuer_needed) {
757	if (cid->issuer_serial == NULL
758	&& (cid->issuer_serial = ESS_ISSUER_SERIAL_new()) == NULL)
759	goto err;
760	if ((name = GENERAL_NAME_new()) == NULL)
761	goto err;
762	name->type = GEN_DIRNAME;
763	if ((name->d.dirn = X509_NAME_dup(X509_get_issuer_name(cert))) == NULL)
764	goto err;
765	if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
766	goto err;
767	name = NULL; /* Ownership is lost. */
768	ASN1_INTEGER_free(cid->issuer_serial->serial);
769	if (!(cid->issuer_serial->serial =
770	ASN1_INTEGER_dup(X509_get_serialNumber(cert))))
771	goto err;
772	}
773
774	return cid;
775	err:
776	GENERAL_NAME_free(name);
777	ESS_CERT_ID_free(cid);
778	TSerr(TS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE);
779	return NULL;
780	}
781
782	static int ts_TST_INFO_content_new(PKCS7 *p7)
783	{
784	PKCS7 *ret = NULL;
785	ASN1_OCTET_STRING *octet_string = NULL;
786
787	/* Create new encapsulated NID_id_smime_ct_TSTInfo content. */
788	if ((ret = PKCS7_new()) == NULL)
789	goto err;
790	if ((ret->d.other = ASN1_TYPE_new()) == NULL)
791	goto err;
792	ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
793	if ((octet_string = ASN1_OCTET_STRING_new()) == NULL)
794	goto err;
795	ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string);
796	octet_string = NULL;
797
798	/* Add encapsulated content to signed PKCS7 structure. */
799	if (!PKCS7_set_content(p7, ret))
800	goto err;
801
802	return 1;
803	err:
804	ASN1_OCTET_STRING_free(octet_string);
805	PKCS7_free(ret);
806	return 0;
807	}
808
809	static int ESS_add_signing_cert(PKCS7_SIGNER_INFO si, ESS_SIGNING_CERT sc)
810	{
811	ASN1_STRING *seq = NULL;
812	unsigned char p, pp = NULL;
813	int len;
814
815	len = i2d_ESS_SIGNING_CERT(sc, NULL);
816	if ((pp = OPENSSL_malloc(len)) == NULL) {
817	TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
818	goto err;
819	}
820	p = pp;
821	i2d_ESS_SIGNING_CERT(sc, &p);
822	if ((seq = ASN1_STRING_new()) == NULL \|\| !ASN1_STRING_set(seq, pp, len)) {
823	TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
824	goto err;
825	}
826	OPENSSL_free(pp);
827	pp = NULL;
828	return PKCS7_add_signed_attribute(si,
829	NID_id_smime_aa_signingCertificate,
830	V_ASN1_SEQUENCE, seq);
831	err:
832	ASN1_STRING_free(seq);
833	OPENSSL_free(pp);
834
835	return 0;
836	}
837
838	static ASN1_GENERALIZEDTIME
839	TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME asn1_time,
840	long sec, long usec, unsigned precision)
841	{
842	time_t time_sec = (time_t)sec;
843	struct tm *tm = NULL;
844	char genTime_str[17 + TS_MAX_CLOCK_PRECISION_DIGITS];
845	char *p = genTime_str;
846	char *p_end = genTime_str + sizeof(genTime_str);
847
848	if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
849	goto err;
850
851	if ((tm = gmtime(&time_sec)) == NULL)
852	goto err;
853
854	/*
855	* Put "genTime_str" in GeneralizedTime format. We work around the
856	* restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST
857	* NOT include fractional seconds") and OpenSSL related functions to
858	* meet the rfc3161 requirement: "GeneralizedTime syntax can include
859	* fraction-of-second details".
860	*/
861	p += BIO_snprintf(p, p_end - p,
862	"%04d%02d%02d%02d%02d%02d",
863	tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
864	tm->tm_hour, tm->tm_min, tm->tm_sec);
865	if (precision > 0) {
866	BIO_snprintf(p, 2 + precision, ".%06ld", usec);
867	p += strlen(p);
868
869	/*
870	* To make things a bit harder, X.690 \| ISO/IEC 8825-1 provides the
871	* following restrictions for a DER-encoding, which OpenSSL
872	* (specifically ASN1_GENERALIZEDTIME_check() function) doesn't
873	* support: "The encoding MUST terminate with a "Z" (which means
874	* "Zulu" time). The decimal point element, if present, MUST be the
875	* point option ".". The fractional-seconds elements, if present,
876	* MUST omit all trailing 0's; if the elements correspond to 0, they
877	* MUST be wholly omitted, and the decimal point element also MUST be
878	* omitted."
879	*/
880	/*
881	* Remove trailing zeros. The dot guarantees the exit condition of
882	* this loop even if all the digits are zero.
883	*/
884	while (*--p == '0')
885	continue;
886	if (*p != '.')
887	++p;
888	}
889	*p++ = 'Z';
890	*p++ = '\0';
891
892	if (asn1_time == NULL
893	&& (asn1_time = ASN1_GENERALIZEDTIME_new()) == NULL)
894	goto err;
895	if (!ASN1_GENERALIZEDTIME_set_string(asn1_time, genTime_str)) {
896	ASN1_GENERALIZEDTIME_free(asn1_time);
897	goto err;
898	}
899	return asn1_time;
900
901	err:
902	TSerr(TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION, TS_R_COULD_NOT_SET_TIME);
903	return NULL;
904	}

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source: vbox/trunk/src/libs/openssl-1.1.0g/crypto/ts/ts_rsp_sign.c@ 69890

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