cms_sd.c@ 109193

Last change on this file since 109193 was 108206, checked in by vboxsync, 3 months ago
openssl-3.3.2: Exported all files to OSE and removed .scm-settings bugref:10757
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 35.5 KB

Line
1	/*
2	* Copyright 2008-2024 The OpenSSL Project Authors. All Rights Reserved.
3	*
4	* Licensed under the Apache License 2.0 (the "License"). You may not use
5	* this file except in compliance with the License. You can obtain a copy
6	* in the file LICENSE in the source distribution or at
7	* https://www.openssl.org/source/license.html
8	*/
9
10	#include "internal/cryptlib.h"
11	#include <openssl/asn1t.h>
12	#include <openssl/pem.h>
13	#include <openssl/x509.h>
14	#include <openssl/x509v3.h>
15	#include <openssl/err.h>
16	#include <openssl/cms.h>
17	#include <openssl/ess.h>
18	#include "internal/sizes.h"
19	#include "crypto/asn1.h"
20	#include "crypto/evp.h"
21	#include "crypto/ess.h"
22	#include "crypto/x509.h" /* for ossl_x509_add_cert_new() */
23	#include "cms_local.h"
24
25	/* CMS SignedData Utilities */
26
27	static CMS_SignedData cms_get0_signed(CMS_ContentInfo cms)
28	{
29	if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed) {
30	ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA);
31	return NULL;
32	}
33	return cms->d.signedData;
34	}
35
36	static CMS_SignedData cms_signed_data_init(CMS_ContentInfo cms)
37	{
38	if (cms->d.other == NULL) {
39	cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
40	if (!cms->d.signedData) {
41	ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
42	return NULL;
43	}
44	cms->d.signedData->version = 1;
45	cms->d.signedData->encapContentInfo->eContentType =
46	OBJ_nid2obj(NID_pkcs7_data);
47	cms->d.signedData->encapContentInfo->partial = 1;
48	ASN1_OBJECT_free(cms->contentType);
49	cms->contentType = OBJ_nid2obj(NID_pkcs7_signed);
50	return cms->d.signedData;
51	}
52	return cms_get0_signed(cms);
53	}
54
55	/* Just initialise SignedData e.g. for certs only structure */
56	int CMS_SignedData_init(CMS_ContentInfo *cms)
57	{
58	if (cms_signed_data_init(cms))
59	return 1;
60	else
61	return 0;
62	}
63
64	/* Check structures and fixup version numbers (if necessary) */
65	static void cms_sd_set_version(CMS_SignedData *sd)
66	{
67	int i;
68	CMS_CertificateChoices *cch;
69	CMS_RevocationInfoChoice *rch;
70	CMS_SignerInfo *si;
71
72	for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++) {
73	cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
74	if (cch->type == CMS_CERTCHOICE_OTHER) {
75	if (sd->version < 5)
76	sd->version = 5;
77	} else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
78	if (sd->version < 4)
79	sd->version = 4;
80	} else if (cch->type == CMS_CERTCHOICE_V1ACERT) {
81	if (sd->version < 3)
82	sd->version = 3;
83	}
84	}
85
86	for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++) {
87	rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
88	if (rch->type == CMS_REVCHOICE_OTHER) {
89	if (sd->version < 5)
90	sd->version = 5;
91	}
92	}
93
94	if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
95	&& (sd->version < 3))
96	sd->version = 3;
97
98	for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
99	si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
100	if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
101	if (si->version < 3)
102	si->version = 3;
103	if (sd->version < 3)
104	sd->version = 3;
105	} else if (si->version < 1) {
106	si->version = 1;
107	}
108	}
109
110	if (sd->version < 1)
111	sd->version = 1;
112
113	}
114
115	/*
116	* RFC 5652 Section 11.1 Content Type
117	* The content-type attribute within signed-data MUST
118	* 1) be present if there are signed attributes
119	* 2) match the content type in the signed-data,
120	* 3) be a signed attribute.
121	* 4) not have more than one copy of the attribute.
122	*
123	* Note that since the CMS_SignerInfo_sign() always adds the "signing time"
124	* attribute, the content type attribute MUST be added also.
125	* Assumptions: This assumes that the attribute does not already exist.
126	*/
127	static int cms_set_si_contentType_attr(CMS_ContentInfo cms, CMS_SignerInfo si)
128	{
129	ASN1_OBJECT *ctype = cms->d.signedData->encapContentInfo->eContentType;
130
131	/* Add the contentType attribute */
132	return CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
133	V_ASN1_OBJECT, ctype, -1) > 0;
134	}
135
136	/* Copy an existing messageDigest value */
137	static int cms_copy_messageDigest(CMS_ContentInfo cms, CMS_SignerInfo si)
138	{
139	STACK_OF(CMS_SignerInfo) *sinfos;
140	CMS_SignerInfo *sitmp;
141	int i;
142
143	sinfos = CMS_get0_SignerInfos(cms);
144	for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
145	ASN1_OCTET_STRING *messageDigest;
146
147	sitmp = sk_CMS_SignerInfo_value(sinfos, i);
148	if (sitmp == si)
149	continue;
150	if (CMS_signed_get_attr_count(sitmp) < 0)
151	continue;
152	if (OBJ_cmp(si->digestAlgorithm->algorithm,
153	sitmp->digestAlgorithm->algorithm))
154	continue;
155	messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
156	OBJ_nid2obj
157	(NID_pkcs9_messageDigest),
158	-3, V_ASN1_OCTET_STRING);
159	if (!messageDigest) {
160	ERR_raise(ERR_LIB_CMS, CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
161	return 0;
162	}
163
164	if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
165	V_ASN1_OCTET_STRING,
166	messageDigest, -1))
167	return 1;
168	else
169	return 0;
170	}
171	ERR_raise(ERR_LIB_CMS, CMS_R_NO_MATCHING_DIGEST);
172	return 0;
173	}
174
175	int ossl_cms_set1_SignerIdentifier(CMS_SignerIdentifier sid, X509 cert,
176	int type, const CMS_CTX *ctx)
177	{
178	switch (type) {
179	case CMS_SIGNERINFO_ISSUER_SERIAL:
180	if (!ossl_cms_set1_ias(&sid->d.issuerAndSerialNumber, cert))
181	return 0;
182	break;
183
184	case CMS_SIGNERINFO_KEYIDENTIFIER:
185	if (!ossl_cms_set1_keyid(&sid->d.subjectKeyIdentifier, cert))
186	return 0;
187	break;
188
189	default:
190	ERR_raise(ERR_LIB_CMS, CMS_R_UNKNOWN_ID);
191	return 0;
192	}
193
194	sid->type = type;
195
196	return 1;
197	}
198
199	int ossl_cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid,
200	ASN1_OCTET_STRING **keyid,
201	X509_NAME **issuer,
202	ASN1_INTEGER **sno)
203	{
204	if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) {
205	if (issuer)
206	*issuer = sid->d.issuerAndSerialNumber->issuer;
207	if (sno)
208	*sno = sid->d.issuerAndSerialNumber->serialNumber;
209	} else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
210	if (keyid)
211	*keyid = sid->d.subjectKeyIdentifier;
212	} else {
213	return 0;
214	}
215	return 1;
216	}
217
218	int ossl_cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier sid, X509 cert)
219	{
220	if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
221	return ossl_cms_ias_cert_cmp(sid->d.issuerAndSerialNumber, cert);
222	else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
223	return ossl_cms_keyid_cert_cmp(sid->d.subjectKeyIdentifier, cert);
224	else
225	return -1;
226	}
227
228	/* Method to map any, incl. provider-implemented PKEY types to OIDs */
229	/* (EC)DSA and all provider-delivered signatures implementation is the same */
230	static int cms_generic_sign(CMS_SignerInfo *si, int verify)
231	{
232	if (!ossl_assert(verify == 0 \|\| verify == 1))
233	return -1;
234
235	if (!verify) {
236	EVP_PKEY *pkey = si->pkey;
237	int snid, hnid, pknid = EVP_PKEY_get_id(pkey);
238	X509_ALGOR alg1, alg2;
239
240	CMS_SignerInfo_get0_algs(si, NULL, NULL, &alg1, &alg2);
241	if (alg1 == NULL \|\| alg1->algorithm == NULL)
242	return -1;
243	hnid = OBJ_obj2nid(alg1->algorithm);
244	if (hnid == NID_undef)
245	return -1;
246	if (pknid <= 0) { /* check whether a provider registered a NID */
247	const char *typename = EVP_PKEY_get0_type_name(pkey);
248
249	if (typename != NULL)
250	pknid = OBJ_txt2nid(typename);
251	}
252	if (!OBJ_find_sigid_by_algs(&snid, hnid, pknid))
253	return -1;
254	return X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, NULL);
255	}
256	return 1;
257	}
258
259	static int cms_sd_asn1_ctrl(CMS_SignerInfo *si, int cmd)
260	{
261	EVP_PKEY *pkey = si->pkey;
262	int i;
263
264	if (EVP_PKEY_is_a(pkey, "DSA") \|\| EVP_PKEY_is_a(pkey, "EC"))
265	return cms_generic_sign(si, cmd) > 0;
266	else if (EVP_PKEY_is_a(pkey, "RSA") \|\| EVP_PKEY_is_a(pkey, "RSA-PSS"))
267	return ossl_cms_rsa_sign(si, cmd) > 0;
268
269	/* Now give engines, providers, etc a chance to handle this */
270	if (pkey->ameth == NULL \|\| pkey->ameth->pkey_ctrl == NULL)
271	return cms_generic_sign(si, cmd) > 0;
272	i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_SIGN, cmd, si);
273	if (i == -2) {
274	ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
275	return 0;
276	}
277	if (i <= 0) {
278	ERR_raise(ERR_LIB_CMS, CMS_R_CTRL_FAILURE);
279	return 0;
280	}
281	return 1;
282	}
283
284	/* Add SigningCertificate signed attribute to the signer info. */
285	static int ossl_cms_add1_signing_cert(CMS_SignerInfo *si,
286	const ESS_SIGNING_CERT *sc)
287	{
288	ASN1_STRING *seq = NULL;
289	unsigned char p, pp = NULL;
290	int ret, len = i2d_ESS_SIGNING_CERT(sc, NULL);
291
292	if (len <= 0 \|\| (pp = OPENSSL_malloc(len)) == NULL)
293	return 0;
294
295	p = pp;
296	i2d_ESS_SIGNING_CERT(sc, &p);
297	if (!(seq = ASN1_STRING_new()) \|\| !ASN1_STRING_set(seq, pp, len)) {
298	ASN1_STRING_free(seq);
299	OPENSSL_free(pp);
300	return 0;
301	}
302	OPENSSL_free(pp);
303	ret = CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_signingCertificate,
304	V_ASN1_SEQUENCE, seq, -1);
305	ASN1_STRING_free(seq);
306	return ret;
307	}
308
309	/* Add SigningCertificateV2 signed attribute to the signer info. */
310	static int ossl_cms_add1_signing_cert_v2(CMS_SignerInfo *si,
311	const ESS_SIGNING_CERT_V2 *sc)
312	{
313	ASN1_STRING *seq = NULL;
314	unsigned char p, pp = NULL;
315	int ret, len = i2d_ESS_SIGNING_CERT_V2(sc, NULL);
316
317	if (len <= 0 \|\| (pp = OPENSSL_malloc(len)) == NULL)
318	return 0;
319
320	p = pp;
321	i2d_ESS_SIGNING_CERT_V2(sc, &p);
322	if (!(seq = ASN1_STRING_new()) \|\| !ASN1_STRING_set(seq, pp, len)) {
323	ASN1_STRING_free(seq);
324	OPENSSL_free(pp);
325	return 0;
326	}
327	OPENSSL_free(pp);
328	ret = CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_signingCertificateV2,
329	V_ASN1_SEQUENCE, seq, -1);
330	ASN1_STRING_free(seq);
331	return ret;
332	}
333
334	CMS_SignerInfo CMS_add1_signer(CMS_ContentInfo cms,
335	X509 signer, EVP_PKEY pk, const EVP_MD *md,
336	unsigned int flags)
337	{
338	CMS_SignedData *sd;
339	CMS_SignerInfo *si = NULL;
340	X509_ALGOR *alg;
341	int i, type;
342	const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms);
343
344	if (!X509_check_private_key(signer, pk)) {
345	ERR_raise(ERR_LIB_CMS, CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
346	return NULL;
347	}
348	sd = cms_signed_data_init(cms);
349	if (!sd)
350	goto err;
351	si = M_ASN1_new_of(CMS_SignerInfo);
352	if (!si) {
353	ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
354	goto err;
355	}
356	/* Call for side-effect of computing hash and caching extensions */
357	X509_check_purpose(signer, -1, -1);
358
359	X509_up_ref(signer);
360	EVP_PKEY_up_ref(pk);
361
362	si->cms_ctx = ctx;
363	si->pkey = pk;
364	si->signer = signer;
365	si->mctx = EVP_MD_CTX_new();
366	si->pctx = NULL;
367
368	if (si->mctx == NULL) {
369	ERR_raise(ERR_LIB_CMS, ERR_R_EVP_LIB);
370	goto err;
371	}
372
373	if (flags & CMS_USE_KEYID) {
374	si->version = 3;
375	if (sd->version < 3)
376	sd->version = 3;
377	type = CMS_SIGNERINFO_KEYIDENTIFIER;
378	} else {
379	type = CMS_SIGNERINFO_ISSUER_SERIAL;
380	si->version = 1;
381	}
382
383	if (!ossl_cms_set1_SignerIdentifier(si->sid, signer, type, ctx))
384	goto err;
385
386	if (md == NULL) {
387	int def_nid;
388
389	if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0) {
390	ERR_raise_data(ERR_LIB_CMS, CMS_R_NO_DEFAULT_DIGEST,
391	"pkey nid=%d", EVP_PKEY_get_id(pk));
392	goto err;
393	}
394	md = EVP_get_digestbynid(def_nid);
395	if (md == NULL) {
396	ERR_raise_data(ERR_LIB_CMS, CMS_R_NO_DEFAULT_DIGEST,
397	"default md nid=%d", def_nid);
398	goto err;
399	}
400	}
401
402	X509_ALGOR_set_md(si->digestAlgorithm, md);
403
404	/* See if digest is present in digestAlgorithms */
405	for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
406	const ASN1_OBJECT *aoid;
407	char name[OSSL_MAX_NAME_SIZE];
408
409	alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
410	X509_ALGOR_get0(&aoid, NULL, NULL, alg);
411	OBJ_obj2txt(name, sizeof(name), aoid, 0);
412	if (EVP_MD_is_a(md, name))
413	break;
414	}
415
416	if (i == sk_X509_ALGOR_num(sd->digestAlgorithms)) {
417	if ((alg = X509_ALGOR_new()) == NULL) {
418	ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
419	goto err;
420	}
421	X509_ALGOR_set_md(alg, md);
422	if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg)) {
423	X509_ALGOR_free(alg);
424	ERR_raise(ERR_LIB_CMS, ERR_R_CRYPTO_LIB);
425	goto err;
426	}
427	}
428
429	if (!(flags & CMS_KEY_PARAM) && !cms_sd_asn1_ctrl(si, 0)) {
430	ERR_raise_data(ERR_LIB_CMS, CMS_R_UNSUPPORTED_SIGNATURE_ALGORITHM,
431	"pkey nid=%d", EVP_PKEY_get_id(pk));
432	goto err;
433	}
434	if (!(flags & CMS_NOATTR)) {
435	/*
436	* Initialize signed attributes structure so other attributes
437	* such as signing time etc are added later even if we add none here.
438	*/
439	if (!si->signedAttrs) {
440	si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
441	if (!si->signedAttrs) {
442	ERR_raise(ERR_LIB_CMS, ERR_R_CRYPTO_LIB);
443	goto err;
444	}
445	}
446
447	if (!(flags & CMS_NOSMIMECAP)) {
448	STACK_OF(X509_ALGOR) *smcap = NULL;
449
450	i = CMS_add_standard_smimecap(&smcap);
451	if (i)
452	i = CMS_add_smimecap(si, smcap);
453	sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
454	if (!i) {
455	ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
456	goto err;
457	}
458	}
459	if (flags & CMS_CADES) {
460	ESS_SIGNING_CERT *sc = NULL;
461	ESS_SIGNING_CERT_V2 *sc2 = NULL;
462	int add_sc;
463
464	if (md == NULL \|\| EVP_MD_is_a(md, SN_sha1)) {
465	if ((sc = OSSL_ESS_signing_cert_new_init(signer,
466	NULL, 1)) == NULL)
467	goto err;
468	add_sc = ossl_cms_add1_signing_cert(si, sc);
469	ESS_SIGNING_CERT_free(sc);
470	} else {
471	if ((sc2 = OSSL_ESS_signing_cert_v2_new_init(md, signer,
472	NULL, 1)) == NULL)
473	goto err;
474	add_sc = ossl_cms_add1_signing_cert_v2(si, sc2);
475	ESS_SIGNING_CERT_V2_free(sc2);
476	}
477	if (!add_sc)
478	goto err;
479	}
480	if (flags & CMS_REUSE_DIGEST) {
481	if (!cms_copy_messageDigest(cms, si))
482	goto err;
483	if (!cms_set_si_contentType_attr(cms, si))
484	goto err;
485	if (!(flags & (CMS_PARTIAL \| CMS_KEY_PARAM)) &&
486	!CMS_SignerInfo_sign(si))
487	goto err;
488	}
489	}
490
491	if (!(flags & CMS_NOCERTS)) {
492	/* NB ignore -1 return for duplicate cert */
493	if (!CMS_add1_cert(cms, signer)) {
494	ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
495	goto err;
496	}
497	}
498
499	if (flags & CMS_KEY_PARAM) {
500	if (flags & CMS_NOATTR) {
501	si->pctx = EVP_PKEY_CTX_new_from_pkey(ossl_cms_ctx_get0_libctx(ctx),
502	si->pkey,
503	ossl_cms_ctx_get0_propq(ctx));
504	if (si->pctx == NULL)
505	goto err;
506	if (EVP_PKEY_sign_init(si->pctx) <= 0)
507	goto err;
508	if (EVP_PKEY_CTX_set_signature_md(si->pctx, md) <= 0)
509	goto err;
510	} else if (EVP_DigestSignInit_ex(si->mctx, &si->pctx,
511	EVP_MD_get0_name(md),
512	ossl_cms_ctx_get0_libctx(ctx),
513	ossl_cms_ctx_get0_propq(ctx),
514	pk, NULL) <= 0) {
515	si->pctx = NULL;
516	goto err;
517	}
518	else {
519	EVP_MD_CTX_set_flags(si->mctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
520	}
521	}
522
523	if (sd->signerInfos == NULL)
524	sd->signerInfos = sk_CMS_SignerInfo_new_null();
525	if (sd->signerInfos == NULL \|\| !sk_CMS_SignerInfo_push(sd->signerInfos, si)) {
526	ERR_raise(ERR_LIB_CMS, ERR_R_CRYPTO_LIB);
527	goto err;
528	}
529
530	return si;
531
532	err:
533	M_ASN1_free_of(si, CMS_SignerInfo);
534	return NULL;
535
536	}
537
538	void ossl_cms_SignerInfos_set_cmsctx(CMS_ContentInfo *cms)
539	{
540	int i;
541	CMS_SignerInfo *si;
542	STACK_OF(CMS_SignerInfo) *sinfos;
543	const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms);
544
545	ERR_set_mark();
546	sinfos = CMS_get0_SignerInfos(cms);
547	ERR_pop_to_mark(); /* removes error in case sinfos == NULL */
548
549	for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
550	si = sk_CMS_SignerInfo_value(sinfos, i);
551	if (si != NULL)
552	si->cms_ctx = ctx;
553	}
554	}
555
556	static int cms_add1_signingTime(CMS_SignerInfo si, ASN1_TIME t)
557	{
558	ASN1_TIME *tt;
559	int r = 0;
560
561	if (t != NULL)
562	tt = t;
563	else
564	tt = X509_gmtime_adj(NULL, 0);
565
566	if (tt == NULL) {
567	ERR_raise(ERR_LIB_CMS, ERR_R_X509_LIB);
568	goto err;
569	}
570
571	if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
572	tt->type, tt, -1) <= 0) {
573	ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
574	goto err;
575	}
576
577	r = 1;
578	err:
579	if (t == NULL)
580	ASN1_TIME_free(tt);
581
582	return r;
583
584	}
585
586	EVP_PKEY_CTX CMS_SignerInfo_get0_pkey_ctx(CMS_SignerInfo si)
587	{
588	return si->pctx;
589	}
590
591	EVP_MD_CTX CMS_SignerInfo_get0_md_ctx(CMS_SignerInfo si)
592	{
593	return si->mctx;
594	}
595
596	STACK_OF(CMS_SignerInfo) CMS_get0_SignerInfos(CMS_ContentInfo cms)
597	{
598	CMS_SignedData *sd = cms_get0_signed(cms);
599
600	return sd != NULL ? sd->signerInfos : NULL;
601	}
602
603	STACK_OF(X509) CMS_get0_signers(CMS_ContentInfo cms)
604	{
605	STACK_OF(X509) *signers = NULL;
606	STACK_OF(CMS_SignerInfo) *sinfos;
607	CMS_SignerInfo *si;
608	int i;
609
610	sinfos = CMS_get0_SignerInfos(cms);
611	for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
612	si = sk_CMS_SignerInfo_value(sinfos, i);
613	if (si->signer != NULL) {
614	if (!ossl_x509_add_cert_new(&signers, si->signer,
615	X509_ADD_FLAG_DEFAULT)) {
616	sk_X509_free(signers);
617	return NULL;
618	}
619	}
620	}
621	return signers;
622	}
623
624	void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo si, X509 signer)
625	{
626	if (signer != NULL) {
627	X509_up_ref(signer);
628	EVP_PKEY_free(si->pkey);
629	si->pkey = X509_get_pubkey(signer);
630	}
631	X509_free(si->signer);
632	si->signer = signer;
633	}
634
635	int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
636	ASN1_OCTET_STRING **keyid,
637	X509_NAME issuer, ASN1_INTEGER sno)
638	{
639	return ossl_cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
640	}
641
642	int CMS_SignerInfo_cert_cmp(CMS_SignerInfo si, X509 cert)
643	{
644	return ossl_cms_SignerIdentifier_cert_cmp(si->sid, cert);
645	}
646
647	int CMS_set1_signers_certs(CMS_ContentInfo cms, STACK_OF(X509) scerts,
648	unsigned int flags)
649	{
650	CMS_SignedData *sd;
651	CMS_SignerInfo *si;
652	CMS_CertificateChoices *cch;
653	STACK_OF(CMS_CertificateChoices) *certs;
654	X509 *x;
655	int i, j;
656	int ret = 0;
657
658	sd = cms_get0_signed(cms);
659	if (sd == NULL)
660	return -1;
661	certs = sd->certificates;
662	for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
663	si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
664	if (si->signer != NULL)
665	continue;
666
667	for (j = 0; j < sk_X509_num(scerts); j++) {
668	x = sk_X509_value(scerts, j);
669	if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
670	CMS_SignerInfo_set1_signer_cert(si, x);
671	ret++;
672	break;
673	}
674	}
675
676	if (si->signer != NULL \|\| (flags & CMS_NOINTERN))
677	continue;
678
679	for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++) {
680	cch = sk_CMS_CertificateChoices_value(certs, j);
681	if (cch->type != CMS_CERTCHOICE_CERT)
682	continue;
683	x = cch->d.certificate;
684	if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
685	CMS_SignerInfo_set1_signer_cert(si, x);
686	ret++;
687	break;
688	}
689	}
690	}
691	return ret;
692	}
693
694	void CMS_SignerInfo_get0_algs(CMS_SignerInfo si, EVP_PKEY *pk,
695	X509 signer, X509_ALGOR pdig,
696	X509_ALGOR **psig)
697	{
698	if (pk != NULL)
699	*pk = si->pkey;
700	if (signer != NULL)
701	*signer = si->signer;
702	if (pdig != NULL)
703	*pdig = si->digestAlgorithm;
704	if (psig != NULL)
705	*psig = si->signatureAlgorithm;
706	}
707
708	ASN1_OCTET_STRING CMS_SignerInfo_get0_signature(CMS_SignerInfo si)
709	{
710	return si->signature;
711	}
712
713	static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
714	CMS_SignerInfo si, BIO chain,
715	const unsigned char *md,
716	unsigned int mdlen)
717	{
718	EVP_MD_CTX *mctx = EVP_MD_CTX_new();
719	int r = 0;
720	EVP_PKEY_CTX *pctx = NULL;
721	const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms);
722
723	if (mctx == NULL) {
724	ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
725	return 0;
726	}
727
728	if (si->pkey == NULL) {
729	ERR_raise(ERR_LIB_CMS, CMS_R_NO_PRIVATE_KEY);
730	goto err;
731	}
732
733	if (!ossl_cms_DigestAlgorithm_find_ctx(mctx, chain, si->digestAlgorithm))
734	goto err;
735	/* Set SignerInfo algorithm details if we used custom parameter */
736	if (si->pctx && !cms_sd_asn1_ctrl(si, 0))
737	goto err;
738
739	/*
740	* If any signed attributes calculate and add messageDigest attribute
741	*/
742	if (CMS_signed_get_attr_count(si) >= 0) {
743	unsigned char computed_md[EVP_MAX_MD_SIZE];
744
745	if (md == NULL) {
746	if (!EVP_DigestFinal_ex(mctx, computed_md, &mdlen))
747	goto err;
748	md = computed_md;
749	}
750	if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
751	V_ASN1_OCTET_STRING, md, mdlen))
752	goto err;
753	/* Copy content type across */
754	if (!cms_set_si_contentType_attr(cms, si))
755	goto err;
756
757	if (!CMS_SignerInfo_sign(si))
758	goto err;
759	} else if (si->pctx) {
760	unsigned char *sig;
761	size_t siglen;
762	unsigned char computed_md[EVP_MAX_MD_SIZE];
763
764	pctx = si->pctx;
765	si->pctx = NULL;
766	if (md == NULL) {
767	if (!EVP_DigestFinal_ex(mctx, computed_md, &mdlen))
768	goto err;
769	md = computed_md;
770	}
771	siglen = EVP_PKEY_get_size(si->pkey);
772	if (siglen == 0 \|\| (sig = OPENSSL_malloc(siglen)) == NULL)
773	goto err;
774	if (EVP_PKEY_sign(pctx, sig, &siglen, md, mdlen) <= 0) {
775	OPENSSL_free(sig);
776	goto err;
777	}
778	ASN1_STRING_set0(si->signature, sig, siglen);
779	} else {
780	unsigned char *sig;
781	unsigned int siglen;
782
783	if (md != NULL) {
784	ERR_raise(ERR_LIB_CMS, CMS_R_OPERATION_UNSUPPORTED);
785	goto err;
786	}
787	siglen = EVP_PKEY_get_size(si->pkey);
788	if (siglen == 0 \|\| (sig = OPENSSL_malloc(siglen)) == NULL)
789	goto err;
790	if (!EVP_SignFinal_ex(mctx, sig, &siglen, si->pkey,
791	ossl_cms_ctx_get0_libctx(ctx),
792	ossl_cms_ctx_get0_propq(ctx))) {
793	ERR_raise(ERR_LIB_CMS, CMS_R_SIGNFINAL_ERROR);
794	OPENSSL_free(sig);
795	goto err;
796	}
797	ASN1_STRING_set0(si->signature, sig, siglen);
798	}
799
800	r = 1;
801
802	err:
803	EVP_MD_CTX_free(mctx);
804	EVP_PKEY_CTX_free(pctx);
805	return r;
806
807	}
808
809	int ossl_cms_SignedData_final(CMS_ContentInfo cms, BIO chain,
810	const unsigned char *precomp_md,
811	unsigned int precomp_mdlen)
812	{
813	STACK_OF(CMS_SignerInfo) *sinfos;
814	CMS_SignerInfo *si;
815	int i;
816
817	sinfos = CMS_get0_SignerInfos(cms);
818	for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
819	si = sk_CMS_SignerInfo_value(sinfos, i);
820	if (!cms_SignerInfo_content_sign(cms, si, chain,
821	precomp_md, precomp_mdlen))
822	return 0;
823	}
824	cms->d.signedData->encapContentInfo->partial = 0;
825	return 1;
826	}
827
828	int CMS_SignerInfo_sign(CMS_SignerInfo *si)
829	{
830	EVP_MD_CTX *mctx = si->mctx;
831	EVP_PKEY_CTX *pctx = NULL;
832	unsigned char *abuf = NULL;
833	int alen;
834	size_t siglen;
835	const CMS_CTX *ctx = si->cms_ctx;
836	char md_name[OSSL_MAX_NAME_SIZE];
837
838	if (OBJ_obj2txt(md_name, sizeof(md_name),
839	si->digestAlgorithm->algorithm, 0) <= 0)
840	return 0;
841
842	if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0) {
843	if (!cms_add1_signingTime(si, NULL))
844	goto err;
845	}
846
847	if (!ossl_cms_si_check_attributes(si))
848	goto err;
849
850	if (si->pctx) {
851	pctx = si->pctx;
852	} else {
853	EVP_MD_CTX_reset(mctx);
854	if (EVP_DigestSignInit_ex(mctx, &pctx, md_name,
855	ossl_cms_ctx_get0_libctx(ctx),
856	ossl_cms_ctx_get0_propq(ctx), si->pkey,
857	NULL) <= 0)
858	goto err;
859	EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
860	si->pctx = pctx;
861	}
862
863	alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
864	ASN1_ITEM_rptr(CMS_Attributes_Sign));
865	if (!abuf)
866	goto err;
867	if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
868	goto err;
869	if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
870	goto err;
871	OPENSSL_free(abuf);
872	abuf = OPENSSL_malloc(siglen);
873	if (abuf == NULL)
874	goto err;
875	if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
876	goto err;
877
878	EVP_MD_CTX_reset(mctx);
879
880	ASN1_STRING_set0(si->signature, abuf, siglen);
881
882	return 1;
883
884	err:
885	OPENSSL_free(abuf);
886	EVP_MD_CTX_reset(mctx);
887	return 0;
888	}
889
890	int CMS_SignerInfo_verify(CMS_SignerInfo *si)
891	{
892	EVP_MD_CTX *mctx = NULL;
893	unsigned char *abuf = NULL;
894	int alen, r = -1;
895	char name[OSSL_MAX_NAME_SIZE];
896	const EVP_MD *md;
897	EVP_MD *fetched_md = NULL;
898	const CMS_CTX *ctx = si->cms_ctx;
899	OSSL_LIB_CTX *libctx = ossl_cms_ctx_get0_libctx(ctx);
900	const char *propq = ossl_cms_ctx_get0_propq(ctx);
901
902	if (si->pkey == NULL) {
903	ERR_raise(ERR_LIB_CMS, CMS_R_NO_PUBLIC_KEY);
904	return -1;
905	}
906
907	if (!ossl_cms_si_check_attributes(si))
908	return -1;
909
910	OBJ_obj2txt(name, sizeof(name), si->digestAlgorithm->algorithm, 0);
911
912	(void)ERR_set_mark();
913	fetched_md = EVP_MD_fetch(libctx, name, propq);
914
915	if (fetched_md != NULL)
916	md = fetched_md;
917	else
918	md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
919	if (md == NULL) {
920	(void)ERR_clear_last_mark();
921	ERR_raise(ERR_LIB_CMS, CMS_R_UNKNOWN_DIGEST_ALGORITHM);
922	return -1;
923	}
924	(void)ERR_pop_to_mark();
925
926	if (si->mctx == NULL && (si->mctx = EVP_MD_CTX_new()) == NULL) {
927	ERR_raise(ERR_LIB_CMS, ERR_R_EVP_LIB);
928	goto err;
929	}
930	mctx = si->mctx;
931	if (si->pctx != NULL) {
932	EVP_PKEY_CTX_free(si->pctx);
933	si->pctx = NULL;
934	}
935	if (EVP_DigestVerifyInit_ex(mctx, &si->pctx, EVP_MD_get0_name(md), libctx,
936	propq, si->pkey, NULL) <= 0) {
937	si->pctx = NULL;
938	goto err;
939	}
940	EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
941
942	if (!cms_sd_asn1_ctrl(si, 1))
943	goto err;
944
945	alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
946	ASN1_ITEM_rptr(CMS_Attributes_Verify));
947	if (abuf == NULL \|\| alen < 0)
948	goto err;
949	r = EVP_DigestVerifyUpdate(mctx, abuf, alen);
950	OPENSSL_free(abuf);
951	if (r <= 0) {
952	r = -1;
953	goto err;
954	}
955	r = EVP_DigestVerifyFinal(mctx,
956	si->signature->data, si->signature->length);
957	if (r <= 0)
958	ERR_raise(ERR_LIB_CMS, CMS_R_VERIFICATION_FAILURE);
959	err:
960	EVP_MD_free(fetched_md);
961	EVP_MD_CTX_reset(mctx);
962	return r;
963	}
964
965	/* Create a chain of digest BIOs from a CMS ContentInfo */
966	BIO ossl_cms_SignedData_init_bio(CMS_ContentInfo cms)
967	{
968	int i;
969	CMS_SignedData *sd;
970	BIO *chain = NULL;
971
972	sd = cms_get0_signed(cms);
973	if (sd == NULL)
974	return NULL;
975	if (cms->d.signedData->encapContentInfo->partial)
976	cms_sd_set_version(sd);
977	for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
978	X509_ALGOR *digestAlgorithm;
979	BIO *mdbio;
980
981	digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
982	mdbio = ossl_cms_DigestAlgorithm_init_bio(digestAlgorithm,
983	ossl_cms_get0_cmsctx(cms));
984	if (mdbio == NULL)
985	goto err;
986	if (chain != NULL)
987	BIO_push(chain, mdbio);
988	else
989	chain = mdbio;
990	}
991	return chain;
992	err:
993	BIO_free_all(chain);
994	return NULL;
995	}
996
997	int CMS_SignerInfo_verify_content(CMS_SignerInfo si, BIO chain)
998	{
999	ASN1_OCTET_STRING *os = NULL;
1000	EVP_MD_CTX *mctx = EVP_MD_CTX_new();
1001	EVP_PKEY_CTX *pkctx = NULL;
1002	int r = -1;
1003	unsigned char mval[EVP_MAX_MD_SIZE];
1004	unsigned int mlen;
1005
1006	if (mctx == NULL) {
1007	ERR_raise(ERR_LIB_CMS, ERR_R_EVP_LIB);
1008	goto err;
1009	}
1010	/* If we have any signed attributes look for messageDigest value */
1011	if (CMS_signed_get_attr_count(si) >= 0) {
1012	os = CMS_signed_get0_data_by_OBJ(si,
1013	OBJ_nid2obj(NID_pkcs9_messageDigest),
1014	-3, V_ASN1_OCTET_STRING);
1015	if (os == NULL) {
1016	ERR_raise(ERR_LIB_CMS, CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
1017	goto err;
1018	}
1019	}
1020
1021	if (!ossl_cms_DigestAlgorithm_find_ctx(mctx, chain, si->digestAlgorithm))
1022	goto err;
1023
1024	if (EVP_DigestFinal_ex(mctx, mval, &mlen) <= 0) {
1025	ERR_raise(ERR_LIB_CMS, CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
1026	goto err;
1027	}
1028
1029	/* If messageDigest found compare it */
1030	if (os != NULL) {
1031	if (mlen != (unsigned int)os->length) {
1032	ERR_raise(ERR_LIB_CMS, CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
1033	goto err;
1034	}
1035
1036	if (memcmp(mval, os->data, mlen)) {
1037	ERR_raise(ERR_LIB_CMS, CMS_R_VERIFICATION_FAILURE);
1038	r = 0;
1039	} else {
1040	r = 1;
1041	}
1042	} else {
1043	const EVP_MD *md = EVP_MD_CTX_get0_md(mctx);
1044	const CMS_CTX *ctx = si->cms_ctx;
1045
1046	pkctx = EVP_PKEY_CTX_new_from_pkey(ossl_cms_ctx_get0_libctx(ctx),
1047	si->pkey,
1048	ossl_cms_ctx_get0_propq(ctx));
1049	if (pkctx == NULL)
1050	goto err;
1051	if (EVP_PKEY_verify_init(pkctx) <= 0)
1052	goto err;
1053	if (EVP_PKEY_CTX_set_signature_md(pkctx, md) <= 0)
1054	goto err;
1055	si->pctx = pkctx;
1056	if (!cms_sd_asn1_ctrl(si, 1)) {
1057	si->pctx = NULL;
1058	goto err;
1059	}
1060	si->pctx = NULL;
1061	r = EVP_PKEY_verify(pkctx, si->signature->data,
1062	si->signature->length, mval, mlen);
1063	if (r <= 0) {
1064	ERR_raise(ERR_LIB_CMS, CMS_R_VERIFICATION_FAILURE);
1065	r = 0;
1066	}
1067	}
1068
1069	err:
1070	EVP_PKEY_CTX_free(pkctx);
1071	EVP_MD_CTX_free(mctx);
1072	return r;
1073
1074	}
1075
1076	BIO CMS_SignedData_verify(CMS_SignedData sd, BIO *detached_data,
1077	STACK_OF(X509) scerts, X509_STORE store,
1078	STACK_OF(X509) extra, STACK_OF(X509_CRL) crls,
1079	unsigned int flags,
1080	OSSL_LIB_CTX libctx, const char propq)
1081	{
1082	CMS_ContentInfo *ci;
1083	BIO *bio = NULL;
1084	int i, res = 0;
1085
1086	if (sd == NULL) {
1087	ERR_raise(ERR_LIB_CMS, ERR_R_PASSED_NULL_PARAMETER);
1088	return NULL;
1089	}
1090
1091	if ((ci = CMS_ContentInfo_new_ex(libctx, propq)) == NULL)
1092	return NULL;
1093	if ((bio = BIO_new(BIO_s_mem())) == NULL)
1094	goto end;
1095	ci->contentType = OBJ_nid2obj(NID_pkcs7_signed);
1096	ci->d.signedData = sd;
1097
1098	for (i = 0; i < sk_X509_num(extra); i++)
1099	if (!CMS_add1_cert(ci, sk_X509_value(extra, i)))
1100	goto end;
1101	for (i = 0; i < sk_X509_CRL_num(crls); i++)
1102	if (!CMS_add1_crl(ci, sk_X509_CRL_value(crls, i)))
1103	goto end;
1104	res = CMS_verify(ci, scerts, store, detached_data, bio, flags);
1105
1106	end:
1107	if (ci != NULL)
1108	ci->d.signedData = NULL; /* do not indirectly free \|sd\| */
1109	CMS_ContentInfo_free(ci);
1110	if (!res) {
1111	BIO_free(bio);
1112	bio = NULL;
1113	}
1114	return bio;
1115	}
1116
1117	int CMS_add_smimecap(CMS_SignerInfo si, STACK_OF(X509_ALGOR) algs)
1118	{
1119	unsigned char *smder = NULL;
1120	int smderlen, r;
1121
1122	smderlen = i2d_X509_ALGORS(algs, &smder);
1123	if (smderlen <= 0)
1124	return 0;
1125	r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
1126	V_ASN1_SEQUENCE, smder, smderlen);
1127	OPENSSL_free(smder);
1128	return r;
1129	}
1130
1131	int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
1132	int algnid, int keysize)
1133	{
1134	X509_ALGOR *alg;
1135	ASN1_INTEGER *key = NULL;
1136
1137	if (keysize > 0) {
1138	key = ASN1_INTEGER_new();
1139	if (key == NULL \|\| !ASN1_INTEGER_set(key, keysize)) {
1140	ASN1_INTEGER_free(key);
1141	return 0;
1142	}
1143	}
1144	alg = ossl_X509_ALGOR_from_nid(algnid, key != NULL ? V_ASN1_INTEGER :
1145	V_ASN1_UNDEF, key);
1146	if (alg == NULL) {
1147	ASN1_INTEGER_free(key);
1148	return 0;
1149	}
1150
1151	if (*algs == NULL)
1152	*algs = sk_X509_ALGOR_new_null();
1153	if (algs == NULL \|\| !sk_X509_ALGOR_push(algs, alg)) {
1154	X509_ALGOR_free(alg);
1155	return 0;
1156	}
1157	return 1;
1158	}
1159
1160	/* Check to see if a cipher exists and if so add S/MIME capabilities */
1161	static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
1162	{
1163	if (EVP_get_cipherbynid(nid))
1164	return CMS_add_simple_smimecap(sk, nid, arg);
1165	return 1;
1166	}
1167
1168	static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
1169	{
1170	if (EVP_get_digestbynid(nid))
1171	return CMS_add_simple_smimecap(sk, nid, arg);
1172	return 1;
1173	}
1174
1175	int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
1176	{
1177	if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
1178	\|\| !cms_add_digest_smcap(smcap, NID_id_GostR3411_2012_256, -1)
1179	\|\| !cms_add_digest_smcap(smcap, NID_id_GostR3411_2012_512, -1)
1180	\|\| !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
1181	\|\| !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
1182	\|\| !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
1183	\|\| !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
1184	\|\| !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
1185	\|\| !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
1186	\|\| !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
1187	\|\| !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
1188	\|\| !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
1189	return 0;
1190	return 1;
1191	}

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/libs/openssl-3.3.2/crypto/cms/cms_sd.c@ 109193

Download in other formats: