cms_smime.c@ 83531

Last change on this file since 83531 was 83531, checked in by vboxsync, 5 years ago
setting svn:sync-process=export for openssl-1.1.1f, all files except tests
File size: 22.9 KB

Line
1	/*
2	* Copyright 2008-2019 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	#include <openssl/asn1t.h>
12	#include <openssl/x509.h>
13	#include <openssl/x509v3.h>
14	#include <openssl/err.h>
15	#include <openssl/cms.h>
16	#include "cms_local.h"
17	#include "crypto/asn1.h"
18
19	static BIO cms_get_text_bio(BIO out, unsigned int flags)
20	{
21	BIO *rbio;
22	if (out == NULL)
23	rbio = BIO_new(BIO_s_null());
24	else if (flags & CMS_TEXT) {
25	rbio = BIO_new(BIO_s_mem());
26	BIO_set_mem_eof_return(rbio, 0);
27	} else
28	rbio = out;
29	return rbio;
30	}
31
32	static int cms_copy_content(BIO out, BIO in, unsigned int flags)
33	{
34	unsigned char buf[4096];
35	int r = 0, i;
36	BIO *tmpout;
37
38	tmpout = cms_get_text_bio(out, flags);
39
40	if (tmpout == NULL) {
41	CMSerr(CMS_F_CMS_COPY_CONTENT, ERR_R_MALLOC_FAILURE);
42	goto err;
43	}
44
45	/* Read all content through chain to process digest, decrypt etc */
46	for (;;) {
47	i = BIO_read(in, buf, sizeof(buf));
48	if (i <= 0) {
49	if (BIO_method_type(in) == BIO_TYPE_CIPHER) {
50	if (!BIO_get_cipher_status(in))
51	goto err;
52	}
53	if (i < 0)
54	goto err;
55	break;
56	}
57
58	if (tmpout && (BIO_write(tmpout, buf, i) != i))
59	goto err;
60	}
61
62	if (flags & CMS_TEXT) {
63	if (!SMIME_text(tmpout, out)) {
64	CMSerr(CMS_F_CMS_COPY_CONTENT, CMS_R_SMIME_TEXT_ERROR);
65	goto err;
66	}
67	}
68
69	r = 1;
70
71	err:
72	if (tmpout != out)
73	BIO_free(tmpout);
74	return r;
75
76	}
77
78	static int check_content(CMS_ContentInfo *cms)
79	{
80	ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
81	if (!pos \|\| !*pos) {
82	CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
83	return 0;
84	}
85	return 1;
86	}
87
88	static void do_free_upto(BIO f, BIO upto)
89	{
90	if (upto) {
91	BIO *tbio;
92	do {
93	tbio = BIO_pop(f);
94	BIO_free(f);
95	f = tbio;
96	}
97	while (f && f != upto);
98	} else
99	BIO_free_all(f);
100	}
101
102	int CMS_data(CMS_ContentInfo cms, BIO out, unsigned int flags)
103	{
104	BIO *cont;
105	int r;
106	if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data) {
107	CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
108	return 0;
109	}
110	cont = CMS_dataInit(cms, NULL);
111	if (!cont)
112	return 0;
113	r = cms_copy_content(out, cont, flags);
114	BIO_free_all(cont);
115	return r;
116	}
117
118	CMS_ContentInfo CMS_data_create(BIO in, unsigned int flags)
119	{
120	CMS_ContentInfo *cms;
121	cms = cms_Data_create();
122	if (!cms)
123	return NULL;
124
125	if ((flags & CMS_STREAM) \|\| CMS_final(cms, in, NULL, flags))
126	return cms;
127
128	CMS_ContentInfo_free(cms);
129
130	return NULL;
131	}
132
133	int CMS_digest_verify(CMS_ContentInfo cms, BIO dcont, BIO *out,
134	unsigned int flags)
135	{
136	BIO *cont;
137	int r;
138	if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest) {
139	CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
140	return 0;
141	}
142
143	if (!dcont && !check_content(cms))
144	return 0;
145
146	cont = CMS_dataInit(cms, dcont);
147	if (!cont)
148	return 0;
149	r = cms_copy_content(out, cont, flags);
150	if (r)
151	r = cms_DigestedData_do_final(cms, cont, 1);
152	do_free_upto(cont, dcont);
153	return r;
154	}
155
156	CMS_ContentInfo CMS_digest_create(BIO in, const EVP_MD *md,
157	unsigned int flags)
158	{
159	CMS_ContentInfo *cms;
160	if (!md)
161	md = EVP_sha1();
162	cms = cms_DigestedData_create(md);
163	if (!cms)
164	return NULL;
165
166	if (!(flags & CMS_DETACHED))
167	CMS_set_detached(cms, 0);
168
169	if ((flags & CMS_STREAM) \|\| CMS_final(cms, in, NULL, flags))
170	return cms;
171
172	CMS_ContentInfo_free(cms);
173	return NULL;
174	}
175
176	int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
177	const unsigned char *key, size_t keylen,
178	BIO dcont, BIO out, unsigned int flags)
179	{
180	BIO *cont;
181	int r;
182	if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted) {
183	CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
184	CMS_R_TYPE_NOT_ENCRYPTED_DATA);
185	return 0;
186	}
187
188	if (!dcont && !check_content(cms))
189	return 0;
190
191	if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
192	return 0;
193	cont = CMS_dataInit(cms, dcont);
194	if (!cont)
195	return 0;
196	r = cms_copy_content(out, cont, flags);
197	do_free_upto(cont, dcont);
198	return r;
199	}
200
201	CMS_ContentInfo CMS_EncryptedData_encrypt(BIO in, const EVP_CIPHER *cipher,
202	const unsigned char *key,
203	size_t keylen, unsigned int flags)
204	{
205	CMS_ContentInfo *cms;
206	if (!cipher) {
207	CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
208	return NULL;
209	}
210	cms = CMS_ContentInfo_new();
211	if (cms == NULL)
212	return NULL;
213	if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
214	return NULL;
215
216	if (!(flags & CMS_DETACHED))
217	CMS_set_detached(cms, 0);
218
219	if ((flags & (CMS_STREAM \| CMS_PARTIAL))
220	\|\| CMS_final(cms, in, NULL, flags))
221	return cms;
222
223	CMS_ContentInfo_free(cms);
224	return NULL;
225	}
226
227	static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
228	X509_STORE *store,
229	STACK_OF(X509) *certs,
230	STACK_OF(X509_CRL) *crls)
231	{
232	X509_STORE_CTX *ctx = X509_STORE_CTX_new();
233	X509 *signer;
234	int i, j, r = 0;
235
236	if (ctx == NULL) {
237	CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, ERR_R_MALLOC_FAILURE);
238	goto err;
239	}
240	CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
241	if (!X509_STORE_CTX_init(ctx, store, signer, certs)) {
242	CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, CMS_R_STORE_INIT_ERROR);
243	goto err;
244	}
245	X509_STORE_CTX_set_default(ctx, "smime_sign");
246	if (crls)
247	X509_STORE_CTX_set0_crls(ctx, crls);
248
249	i = X509_verify_cert(ctx);
250	if (i <= 0) {
251	j = X509_STORE_CTX_get_error(ctx);
252	CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
253	CMS_R_CERTIFICATE_VERIFY_ERROR);
254	ERR_add_error_data(2, "Verify error:",
255	X509_verify_cert_error_string(j));
256	goto err;
257	}
258	r = 1;
259	err:
260	X509_STORE_CTX_free(ctx);
261	return r;
262
263	}
264
265	int CMS_verify(CMS_ContentInfo cms, STACK_OF(X509) certs,
266	X509_STORE store, BIO dcont, BIO *out, unsigned int flags)
267	{
268	CMS_SignerInfo *si;
269	STACK_OF(CMS_SignerInfo) *sinfos;
270	STACK_OF(X509) *cms_certs = NULL;
271	STACK_OF(X509_CRL) *crls = NULL;
272	X509 *signer;
273	int i, scount = 0, ret = 0;
274	BIO cmsbio = NULL, tmpin = NULL, *tmpout = NULL;
275
276	if (!dcont && !check_content(cms))
277	return 0;
278	if (dcont && !(flags & CMS_BINARY)) {
279	const ASN1_OBJECT *coid = CMS_get0_eContentType(cms);
280	if (OBJ_obj2nid(coid) == NID_id_ct_asciiTextWithCRLF)
281	flags \|= CMS_ASCIICRLF;
282	}
283
284	/* Attempt to find all signer certificates */
285
286	sinfos = CMS_get0_SignerInfos(cms);
287
288	if (sk_CMS_SignerInfo_num(sinfos) <= 0) {
289	CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
290	goto err;
291	}
292
293	for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
294	si = sk_CMS_SignerInfo_value(sinfos, i);
295	CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
296	if (signer)
297	scount++;
298	}
299
300	if (scount != sk_CMS_SignerInfo_num(sinfos))
301	scount += CMS_set1_signers_certs(cms, certs, flags);
302
303	if (scount != sk_CMS_SignerInfo_num(sinfos)) {
304	CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
305	goto err;
306	}
307
308	/* Attempt to verify all signers certs */
309
310	if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) {
311	cms_certs = CMS_get1_certs(cms);
312	if (!(flags & CMS_NOCRL))
313	crls = CMS_get1_crls(cms);
314	for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
315	si = sk_CMS_SignerInfo_value(sinfos, i);
316	if (!cms_signerinfo_verify_cert(si, store, cms_certs, crls))
317	goto err;
318	}
319	}
320
321	/* Attempt to verify all SignerInfo signed attribute signatures */
322
323	if (!(flags & CMS_NO_ATTR_VERIFY)) {
324	for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
325	si = sk_CMS_SignerInfo_value(sinfos, i);
326	if (CMS_signed_get_attr_count(si) < 0)
327	continue;
328	if (CMS_SignerInfo_verify(si) <= 0)
329	goto err;
330	}
331	}
332
333	/*
334	* Performance optimization: if the content is a memory BIO then store
335	* its contents in a temporary read only memory BIO. This avoids
336	* potentially large numbers of slow copies of data which will occur when
337	* reading from a read write memory BIO when signatures are calculated.
338	*/
339
340	if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) {
341	char *ptr;
342	long len;
343	len = BIO_get_mem_data(dcont, &ptr);
344	tmpin = BIO_new_mem_buf(ptr, len);
345	if (tmpin == NULL) {
346	CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
347	goto err2;
348	}
349	} else
350	tmpin = dcont;
351	/*
352	* If not binary mode and detached generate digests by writing through
353	* the BIO. That makes it possible to canonicalise the input.
354	*/
355	if (!(flags & SMIME_BINARY) && dcont) {
356	/*
357	* Create output BIO so we can either handle text or to ensure
358	* included content doesn't override detached content.
359	*/
360	tmpout = cms_get_text_bio(out, flags);
361	if (!tmpout) {
362	CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
363	goto err;
364	}
365	cmsbio = CMS_dataInit(cms, tmpout);
366	if (!cmsbio)
367	goto err;
368	/*
369	* Don't use SMIME_TEXT for verify: it adds headers and we want to
370	* remove them.
371	*/
372	SMIME_crlf_copy(dcont, cmsbio, flags & ~SMIME_TEXT);
373
374	if (flags & CMS_TEXT) {
375	if (!SMIME_text(tmpout, out)) {
376	CMSerr(CMS_F_CMS_VERIFY, CMS_R_SMIME_TEXT_ERROR);
377	goto err;
378	}
379	}
380	} else {
381	cmsbio = CMS_dataInit(cms, tmpin);
382	if (!cmsbio)
383	goto err;
384
385	if (!cms_copy_content(out, cmsbio, flags))
386	goto err;
387
388	}
389	if (!(flags & CMS_NO_CONTENT_VERIFY)) {
390	for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
391	si = sk_CMS_SignerInfo_value(sinfos, i);
392	if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) {
393	CMSerr(CMS_F_CMS_VERIFY, CMS_R_CONTENT_VERIFY_ERROR);
394	goto err;
395	}
396	}
397	}
398
399	ret = 1;
400
401	err:
402	if (!(flags & SMIME_BINARY) && dcont) {
403	do_free_upto(cmsbio, tmpout);
404	if (tmpin != dcont)
405	BIO_free(tmpin);
406	} else {
407	if (dcont && (tmpin == dcont))
408	do_free_upto(cmsbio, dcont);
409	else
410	BIO_free_all(cmsbio);
411	}
412
413	if (out != tmpout)
414	BIO_free_all(tmpout);
415
416	err2:
417	sk_X509_pop_free(cms_certs, X509_free);
418	sk_X509_CRL_pop_free(crls, X509_CRL_free);
419
420	return ret;
421	}
422
423	int CMS_verify_receipt(CMS_ContentInfo rcms, CMS_ContentInfo ocms,
424	STACK_OF(X509) *certs,
425	X509_STORE *store, unsigned int flags)
426	{
427	int r;
428	flags &= ~(CMS_DETACHED \| CMS_TEXT);
429	r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
430	if (r <= 0)
431	return r;
432	return cms_Receipt_verify(rcms, ocms);
433	}
434
435	CMS_ContentInfo CMS_sign(X509 signcert, EVP_PKEY *pkey,
436	STACK_OF(X509) certs, BIO data,
437	unsigned int flags)
438	{
439	CMS_ContentInfo *cms;
440	int i;
441
442	cms = CMS_ContentInfo_new();
443	if (cms == NULL \|\| !CMS_SignedData_init(cms))
444	goto merr;
445	if (flags & CMS_ASCIICRLF
446	&& !CMS_set1_eContentType(cms,
447	OBJ_nid2obj(NID_id_ct_asciiTextWithCRLF)))
448	goto err;
449
450	if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) {
451	CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
452	goto err;
453	}
454
455	for (i = 0; i < sk_X509_num(certs); i++) {
456	X509 *x = sk_X509_value(certs, i);
457	if (!CMS_add1_cert(cms, x))
458	goto merr;
459	}
460
461	if (!(flags & CMS_DETACHED))
462	CMS_set_detached(cms, 0);
463
464	if ((flags & (CMS_STREAM \| CMS_PARTIAL))
465	\|\| CMS_final(cms, data, NULL, flags))
466	return cms;
467	else
468	goto err;
469
470	merr:
471	CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
472
473	err:
474	CMS_ContentInfo_free(cms);
475	return NULL;
476	}
477
478	CMS_ContentInfo CMS_sign_receipt(CMS_SignerInfo si,
479	X509 signcert, EVP_PKEY pkey,
480	STACK_OF(X509) *certs, unsigned int flags)
481	{
482	CMS_SignerInfo *rct_si;
483	CMS_ContentInfo *cms = NULL;
484	ASN1_OCTET_STRING *pos, os;
485	BIO *rct_cont = NULL;
486	int r = 0;
487
488	flags &= ~(CMS_STREAM \| CMS_TEXT);
489	/* Not really detached but avoids content being allocated */
490	flags \|= CMS_PARTIAL \| CMS_BINARY \| CMS_DETACHED;
491	if (!pkey \|\| !signcert) {
492	CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
493	return NULL;
494	}
495
496	/* Initialize signed data */
497
498	cms = CMS_sign(NULL, NULL, certs, NULL, flags);
499	if (!cms)
500	goto err;
501
502	/* Set inner content type to signed receipt */
503	if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
504	goto err;
505
506	rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
507	if (!rct_si) {
508	CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
509	goto err;
510	}
511
512	os = cms_encode_Receipt(si);
513
514	if (!os)
515	goto err;
516
517	/* Set content to digest */
518	rct_cont = BIO_new_mem_buf(os->data, os->length);
519	if (!rct_cont)
520	goto err;
521
522	/* Add msgSigDigest attribute */
523
524	if (!cms_msgSigDigest_add1(rct_si, si))
525	goto err;
526
527	/* Finalize structure */
528	if (!CMS_final(cms, rct_cont, NULL, flags))
529	goto err;
530
531	/* Set embedded content */
532	pos = CMS_get0_content(cms);
533	*pos = os;
534
535	r = 1;
536
537	err:
538	BIO_free(rct_cont);
539	if (r)
540	return cms;
541	CMS_ContentInfo_free(cms);
542	return NULL;
543
544	}
545
546	CMS_ContentInfo CMS_encrypt(STACK_OF(X509) certs, BIO *data,
547	const EVP_CIPHER *cipher, unsigned int flags)
548	{
549	CMS_ContentInfo *cms;
550	int i;
551	X509 *recip;
552	cms = CMS_EnvelopedData_create(cipher);
553	if (!cms)
554	goto merr;
555	for (i = 0; i < sk_X509_num(certs); i++) {
556	recip = sk_X509_value(certs, i);
557	if (!CMS_add1_recipient_cert(cms, recip, flags)) {
558	CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
559	goto err;
560	}
561	}
562
563	if (!(flags & CMS_DETACHED))
564	CMS_set_detached(cms, 0);
565
566	if ((flags & (CMS_STREAM \| CMS_PARTIAL))
567	\|\| CMS_final(cms, data, NULL, flags))
568	return cms;
569	else
570	goto err;
571
572	merr:
573	CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
574	err:
575	CMS_ContentInfo_free(cms);
576	return NULL;
577	}
578
579	static int cms_kari_set1_pkey(CMS_ContentInfo cms, CMS_RecipientInfo ri,
580	EVP_PKEY pk, X509 cert)
581	{
582	int i;
583	STACK_OF(CMS_RecipientEncryptedKey) *reks;
584	CMS_RecipientEncryptedKey *rek;
585	reks = CMS_RecipientInfo_kari_get0_reks(ri);
586	for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++) {
587	int rv;
588	rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
589	if (cert != NULL && CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
590	continue;
591	CMS_RecipientInfo_kari_set0_pkey(ri, pk);
592	rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
593	CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
594	if (rv > 0)
595	return 1;
596	return cert == NULL ? 0 : -1;
597	}
598	return 0;
599	}
600
601	int CMS_decrypt_set1_pkey(CMS_ContentInfo cms, EVP_PKEY pk, X509 *cert)
602	{
603	STACK_OF(CMS_RecipientInfo) *ris;
604	CMS_RecipientInfo *ri;
605	int i, r, ri_type;
606	int debug = 0, match_ri = 0;
607	ris = CMS_get0_RecipientInfos(cms);
608	if (ris)
609	debug = cms->d.envelopedData->encryptedContentInfo->debug;
610	ri_type = cms_pkey_get_ri_type(pk);
611	if (ri_type == CMS_RECIPINFO_NONE) {
612	CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
613	CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
614	return 0;
615	}
616
617	for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
618	ri = sk_CMS_RecipientInfo_value(ris, i);
619	if (CMS_RecipientInfo_type(ri) != ri_type)
620	continue;
621	match_ri = 1;
622	if (ri_type == CMS_RECIPINFO_AGREE) {
623	r = cms_kari_set1_pkey(cms, ri, pk, cert);
624	if (r > 0)
625	return 1;
626	if (r < 0)
627	return 0;
628	}
629	/*
630	* If we have a cert try matching RecipientInfo otherwise try them
631	* all.
632	*/
633	else if (!cert \|\| !CMS_RecipientInfo_ktri_cert_cmp(ri, cert)) {
634	EVP_PKEY_up_ref(pk);
635	CMS_RecipientInfo_set0_pkey(ri, pk);
636	r = CMS_RecipientInfo_decrypt(cms, ri);
637	CMS_RecipientInfo_set0_pkey(ri, NULL);
638	if (cert) {
639	/*
640	* If not debugging clear any error and return success to
641	* avoid leaking of information useful to MMA
642	*/
643	if (!debug) {
644	ERR_clear_error();
645	return 1;
646	}
647	if (r > 0)
648	return 1;
649	CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_DECRYPT_ERROR);
650	return 0;
651	}
652	/*
653	* If no cert and not debugging don't leave loop after first
654	* successful decrypt. Always attempt to decrypt all recipients
655	* to avoid leaking timing of a successful decrypt.
656	*/
657	else if (r > 0 && debug)
658	return 1;
659	}
660	}
661	/* If no cert, key transport and not debugging always return success */
662	if (cert == NULL && ri_type == CMS_RECIPINFO_TRANS && match_ri && !debug) {
663	ERR_clear_error();
664	return 1;
665	}
666
667	CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
668	return 0;
669
670	}
671
672	int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
673	unsigned char *key, size_t keylen,
674	const unsigned char *id, size_t idlen)
675	{
676	STACK_OF(CMS_RecipientInfo) *ris;
677	CMS_RecipientInfo *ri;
678	int i, r;
679	ris = CMS_get0_RecipientInfos(cms);
680	for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
681	ri = sk_CMS_RecipientInfo_value(ris, i);
682	if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
683	continue;
684
685	/*
686	* If we have an id try matching RecipientInfo otherwise try them
687	* all.
688	*/
689	if (!id \|\| (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) {
690	CMS_RecipientInfo_set0_key(ri, key, keylen);
691	r = CMS_RecipientInfo_decrypt(cms, ri);
692	CMS_RecipientInfo_set0_key(ri, NULL, 0);
693	if (r > 0)
694	return 1;
695	if (id) {
696	CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_DECRYPT_ERROR);
697	return 0;
698	}
699	ERR_clear_error();
700	}
701	}
702
703	CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
704	return 0;
705
706	}
707
708	int CMS_decrypt_set1_password(CMS_ContentInfo *cms,
709	unsigned char *pass, ossl_ssize_t passlen)
710	{
711	STACK_OF(CMS_RecipientInfo) *ris;
712	CMS_RecipientInfo *ri;
713	int i, r;
714	ris = CMS_get0_RecipientInfos(cms);
715	for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
716	ri = sk_CMS_RecipientInfo_value(ris, i);
717	if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
718	continue;
719	CMS_RecipientInfo_set0_password(ri, pass, passlen);
720	r = CMS_RecipientInfo_decrypt(cms, ri);
721	CMS_RecipientInfo_set0_password(ri, NULL, 0);
722	if (r > 0)
723	return 1;
724	}
725
726	CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
727	return 0;
728
729	}
730
731	int CMS_decrypt(CMS_ContentInfo cms, EVP_PKEY pk, X509 *cert,
732	BIO dcont, BIO out, unsigned int flags)
733	{
734	int r;
735	BIO *cont;
736	if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) {
737	CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
738	return 0;
739	}
740	if (!dcont && !check_content(cms))
741	return 0;
742	if (flags & CMS_DEBUG_DECRYPT)
743	cms->d.envelopedData->encryptedContentInfo->debug = 1;
744	else
745	cms->d.envelopedData->encryptedContentInfo->debug = 0;
746	if (!cert)
747	cms->d.envelopedData->encryptedContentInfo->havenocert = 1;
748	else
749	cms->d.envelopedData->encryptedContentInfo->havenocert = 0;
750	if (!pk && !cert && !dcont && !out)
751	return 1;
752	if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
753	return 0;
754	cont = CMS_dataInit(cms, dcont);
755	if (!cont)
756	return 0;
757	r = cms_copy_content(out, cont, flags);
758	do_free_upto(cont, dcont);
759	return r;
760	}
761
762	int CMS_final(CMS_ContentInfo cms, BIO data, BIO *dcont, unsigned int flags)
763	{
764	BIO *cmsbio;
765	int ret = 0;
766
767	if ((cmsbio = CMS_dataInit(cms, dcont)) == NULL) {
768	CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_LIB);
769	return 0;
770	}
771
772	SMIME_crlf_copy(data, cmsbio, flags);
773
774	(void)BIO_flush(cmsbio);
775
776	if (!CMS_dataFinal(cms, cmsbio)) {
777	CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_DATAFINAL_ERROR);
778	goto err;
779	}
780
781	ret = 1;
782
783	err:
784	do_free_upto(cmsbio, dcont);
785
786	return ret;
787
788	}
789
790	#ifdef ZLIB
791
792	int CMS_uncompress(CMS_ContentInfo cms, BIO dcont, BIO *out,
793	unsigned int flags)
794	{
795	BIO *cont;
796	int r;
797	if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData) {
798	CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_TYPE_NOT_COMPRESSED_DATA);
799	return 0;
800	}
801
802	if (!dcont && !check_content(cms))
803	return 0;
804
805	cont = CMS_dataInit(cms, dcont);
806	if (!cont)
807	return 0;
808	r = cms_copy_content(out, cont, flags);
809	do_free_upto(cont, dcont);
810	return r;
811	}
812
813	CMS_ContentInfo CMS_compress(BIO in, int comp_nid, unsigned int flags)
814	{
815	CMS_ContentInfo *cms;
816	if (comp_nid <= 0)
817	comp_nid = NID_zlib_compression;
818	cms = cms_CompressedData_create(comp_nid);
819	if (!cms)
820	return NULL;
821
822	if (!(flags & CMS_DETACHED))
823	CMS_set_detached(cms, 0);
824
825	if ((flags & CMS_STREAM) \|\| CMS_final(cms, in, NULL, flags))
826	return cms;
827
828	CMS_ContentInfo_free(cms);
829	return NULL;
830	}
831
832	#else
833
834	int CMS_uncompress(CMS_ContentInfo cms, BIO dcont, BIO *out,
835	unsigned int flags)
836	{
837	CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
838	return 0;
839	}
840
841	CMS_ContentInfo CMS_compress(BIO in, int comp_nid, unsigned int flags)
842	{
843	CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
844	return NULL;
845	}
846
847	#endif

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source: vbox/trunk/src/libs/openssl-1.1.1f/crypto/cms/cms_smime.c@ 83531

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