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Diffstat (limited to 'src/lib/libcrypto/cms/cms_smime.c')
-rw-r--r--src/lib/libcrypto/cms/cms_smime.c908
1 files changed, 0 insertions, 908 deletions
diff --git a/src/lib/libcrypto/cms/cms_smime.c b/src/lib/libcrypto/cms/cms_smime.c
deleted file mode 100644
index 5a194748d9..0000000000
--- a/src/lib/libcrypto/cms/cms_smime.c
+++ /dev/null
@@ -1,908 +0,0 @@
1/* $OpenBSD: cms_smime.c,v 1.28 2023/12/22 10:23:11 tb Exp $ */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 * project.
5 */
6/* ====================================================================
7 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 */
54
55#include <sys/types.h>
56
57#include <stddef.h>
58
59#include <openssl/asn1.h>
60#include <openssl/bio.h>
61#include <openssl/cms.h>
62#include <openssl/err.h>
63#include <openssl/evp.h>
64#include <openssl/objects.h>
65#include <openssl/pkcs7.h>
66#include <openssl/x509.h>
67#include <openssl/x509_vfy.h>
68
69#include "cms_local.h"
70
71static BIO *
72cms_get_text_bio(BIO *out, unsigned int flags)
73{
74 BIO *rbio;
75
76 if (out == NULL)
77 rbio = BIO_new(BIO_s_null());
78 else if (flags & CMS_TEXT) {
79 rbio = BIO_new(BIO_s_mem());
80 BIO_set_mem_eof_return(rbio, 0);
81 } else
82 rbio = out;
83
84 return rbio;
85}
86
87static int
88cms_copy_content(BIO *out, BIO *in, unsigned int flags)
89{
90 unsigned char buf[4096];
91 int r = 0, i;
92 BIO *tmpout;
93
94 tmpout = cms_get_text_bio(out, flags);
95
96 if (tmpout == NULL) {
97 CMSerror(ERR_R_MALLOC_FAILURE);
98 goto err;
99 }
100
101 /* Read all content through chain to process digest, decrypt etc */
102 for (;;) {
103 i = BIO_read(in, buf, sizeof(buf));
104 if (i <= 0) {
105 if (BIO_method_type(in) == BIO_TYPE_CIPHER) {
106 if (!BIO_get_cipher_status(in))
107 goto err;
108 }
109 if (i < 0)
110 goto err;
111 break;
112 }
113
114 if (tmpout && (BIO_write(tmpout, buf, i) != i))
115 goto err;
116 }
117
118 if (flags & CMS_TEXT) {
119 if (!SMIME_text(tmpout, out)) {
120 CMSerror(CMS_R_SMIME_TEXT_ERROR);
121 goto err;
122 }
123 }
124
125 r = 1;
126
127 err:
128 if (tmpout != out)
129 BIO_free(tmpout);
130
131 return r;
132}
133
134static int
135check_content(CMS_ContentInfo *cms)
136{
137 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
138
139 if (!pos || !*pos) {
140 CMSerror(CMS_R_NO_CONTENT);
141 return 0;
142 }
143
144 return 1;
145}
146
147static void
148do_free_upto(BIO *f, BIO *upto)
149{
150 if (upto) {
151 BIO *tbio;
152 do {
153 tbio = BIO_pop(f);
154 BIO_free(f);
155 f = tbio;
156 }
157 while (f && f != upto);
158 } else
159 BIO_free_all(f);
160}
161
162int
163CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
164{
165 BIO *cont;
166 int r;
167
168 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data) {
169 CMSerror(CMS_R_TYPE_NOT_DATA);
170 return 0;
171 }
172 cont = CMS_dataInit(cms, NULL);
173 if (!cont)
174 return 0;
175 r = cms_copy_content(out, cont, flags);
176 BIO_free_all(cont);
177
178 return r;
179}
180LCRYPTO_ALIAS(CMS_data);
181
182CMS_ContentInfo *
183CMS_data_create(BIO *in, unsigned int flags)
184{
185 CMS_ContentInfo *cms;
186
187 cms = cms_Data_create();
188 if (!cms)
189 return NULL;
190
191 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
192 return cms;
193
194 CMS_ContentInfo_free(cms);
195
196 return NULL;
197}
198LCRYPTO_ALIAS(CMS_data_create);
199
200int
201CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags)
202{
203 BIO *cont;
204 int r;
205
206 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest) {
207 CMSerror(CMS_R_TYPE_NOT_DIGESTED_DATA);
208 return 0;
209 }
210
211 if (!dcont && !check_content(cms))
212 return 0;
213
214 cont = CMS_dataInit(cms, dcont);
215 if (!cont)
216 return 0;
217 r = cms_copy_content(out, cont, flags);
218 if (r)
219 r = cms_DigestedData_do_final(cms, cont, 1);
220 do_free_upto(cont, dcont);
221
222 return r;
223}
224LCRYPTO_ALIAS(CMS_digest_verify);
225
226CMS_ContentInfo *
227CMS_digest_create(BIO *in, const EVP_MD *md, unsigned int flags)
228{
229 CMS_ContentInfo *cms;
230
231 if (!md)
232 md = EVP_sha1();
233 cms = cms_DigestedData_create(md);
234 if (!cms)
235 return NULL;
236
237 if (!(flags & CMS_DETACHED))
238 CMS_set_detached(cms, 0);
239
240 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
241 return cms;
242
243 CMS_ContentInfo_free(cms);
244
245 return NULL;
246}
247LCRYPTO_ALIAS(CMS_digest_create);
248
249int
250CMS_EncryptedData_decrypt(CMS_ContentInfo *cms, const unsigned char *key,
251 size_t keylen, BIO *dcont, BIO *out, unsigned int flags)
252{
253 BIO *cont;
254 int r;
255
256 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted) {
257 CMSerror(CMS_R_TYPE_NOT_ENCRYPTED_DATA);
258 return 0;
259 }
260
261 if (!dcont && !check_content(cms))
262 return 0;
263
264 if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
265 return 0;
266 cont = CMS_dataInit(cms, dcont);
267 if (!cont)
268 return 0;
269 r = cms_copy_content(out, cont, flags);
270 do_free_upto(cont, dcont);
271
272 return r;
273}
274LCRYPTO_ALIAS(CMS_EncryptedData_decrypt);
275
276CMS_ContentInfo *
277CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
278 const unsigned char *key, size_t keylen, unsigned int flags)
279{
280 CMS_ContentInfo *cms;
281
282 if (!cipher) {
283 CMSerror(CMS_R_NO_CIPHER);
284 return NULL;
285 }
286 cms = CMS_ContentInfo_new();
287 if (cms == NULL)
288 return NULL;
289 if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
290 return NULL;
291
292 if (!(flags & CMS_DETACHED))
293 CMS_set_detached(cms, 0);
294
295 if ((flags & (CMS_STREAM | CMS_PARTIAL)) ||
296 CMS_final(cms, in, NULL, flags))
297 return cms;
298
299 CMS_ContentInfo_free(cms);
300
301 return NULL;
302}
303LCRYPTO_ALIAS(CMS_EncryptedData_encrypt);
304
305static int
306cms_signerinfo_verify_cert(CMS_SignerInfo *si, X509_STORE *store,
307 STACK_OF(X509) *certs, STACK_OF(X509_CRL) *crls)
308{
309 X509_STORE_CTX *ctx = X509_STORE_CTX_new();
310 X509 *signer;
311 int i, j, r = 0;
312
313 if (ctx == NULL) {
314 CMSerror(ERR_R_MALLOC_FAILURE);
315 goto err;
316 }
317 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
318 if (!X509_STORE_CTX_init(ctx, store, signer, certs)) {
319 CMSerror(CMS_R_STORE_INIT_ERROR);
320 goto err;
321 }
322 X509_STORE_CTX_set_default(ctx, "smime_sign");
323 if (crls)
324 X509_STORE_CTX_set0_crls(ctx, crls);
325
326 i = X509_verify_cert(ctx);
327 if (i <= 0) {
328 j = X509_STORE_CTX_get_error(ctx);
329 CMSerror(CMS_R_CERTIFICATE_VERIFY_ERROR);
330 ERR_asprintf_error_data("Verify error: %s",
331 X509_verify_cert_error_string(j));
332 goto err;
333 }
334 r = 1;
335
336 err:
337 X509_STORE_CTX_free(ctx);
338
339 return r;
340}
341
342int
343CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs, X509_STORE *store,
344 BIO *dcont, BIO *out, unsigned int flags)
345{
346 CMS_SignerInfo *si;
347 STACK_OF(CMS_SignerInfo) *sinfos;
348 STACK_OF(X509) *cms_certs = NULL;
349 STACK_OF(X509_CRL) *crls = NULL;
350 X509 *signer;
351 int i, scount = 0, ret = 0;
352 BIO *cmsbio = NULL, *tmpin = NULL, *tmpout = NULL;
353
354 if (!dcont && !check_content(cms))
355 return 0;
356 if (dcont && !(flags & CMS_BINARY)) {
357 const ASN1_OBJECT *coid = CMS_get0_eContentType(cms);
358 if (OBJ_obj2nid(coid) == NID_id_ct_asciiTextWithCRLF)
359 flags |= CMS_ASCIICRLF;
360 }
361
362 /* Attempt to find all signer certificates */
363
364 sinfos = CMS_get0_SignerInfos(cms);
365 if (sk_CMS_SignerInfo_num(sinfos) <= 0) {
366 CMSerror(CMS_R_NO_SIGNERS);
367 goto err;
368 }
369
370 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
371 si = sk_CMS_SignerInfo_value(sinfos, i);
372 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
373 if (signer)
374 scount++;
375 }
376
377 if (scount != sk_CMS_SignerInfo_num(sinfos))
378 scount += CMS_set1_signers_certs(cms, certs, flags);
379
380 if (scount != sk_CMS_SignerInfo_num(sinfos)) {
381 CMSerror(CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
382 goto err;
383 }
384
385 /* Attempt to verify all signers certs */
386
387 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) {
388 cms_certs = CMS_get1_certs(cms);
389 if (!(flags & CMS_NOCRL))
390 crls = CMS_get1_crls(cms);
391 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
392 si = sk_CMS_SignerInfo_value(sinfos, i);
393 if (!cms_signerinfo_verify_cert(si, store, cms_certs, crls))
394 goto err;
395 }
396 }
397
398 /* Attempt to verify all SignerInfo signed attribute signatures */
399
400 if (!(flags & CMS_NO_ATTR_VERIFY)) {
401 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
402 si = sk_CMS_SignerInfo_value(sinfos, i);
403 if (CMS_signed_get_attr_count(si) < 0)
404 continue;
405 if (CMS_SignerInfo_verify(si) <= 0)
406 goto err;
407 }
408 }
409
410 /*
411 * Performance optimization: if the content is a memory BIO then store
412 * its contents in a temporary read only memory BIO. This avoids
413 * potentially large numbers of slow copies of data which will occur when
414 * reading from a read write memory BIO when signatures are calculated.
415 */
416
417 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) {
418 char *ptr;
419 long len;
420
421 len = BIO_get_mem_data(dcont, &ptr);
422 tmpin = BIO_new_mem_buf(ptr, len);
423 if (tmpin == NULL) {
424 CMSerror(ERR_R_MALLOC_FAILURE);
425 goto err2;
426 }
427 } else
428 tmpin = dcont;
429
430 /*
431 * If not binary mode and detached generate digests by *writing* through
432 * the BIO. That makes it possible to canonicalise the input.
433 */
434 if (!(flags & SMIME_BINARY) && dcont) {
435 /*
436 * Create output BIO so we can either handle text or to ensure
437 * included content doesn't override detached content.
438 */
439 tmpout = cms_get_text_bio(out, flags);
440 if (!tmpout) {
441 CMSerror(ERR_R_MALLOC_FAILURE);
442 goto err;
443 }
444 cmsbio = CMS_dataInit(cms, tmpout);
445 if (!cmsbio)
446 goto err;
447 /*
448 * Don't use SMIME_TEXT for verify: it adds headers and we want to
449 * remove them.
450 */
451 SMIME_crlf_copy(dcont, cmsbio, flags & ~SMIME_TEXT);
452
453 if (flags & CMS_TEXT) {
454 if (!SMIME_text(tmpout, out)) {
455 CMSerror(CMS_R_SMIME_TEXT_ERROR);
456 goto err;
457 }
458 }
459 } else {
460 cmsbio = CMS_dataInit(cms, tmpin);
461 if (!cmsbio)
462 goto err;
463
464 if (!cms_copy_content(out, cmsbio, flags))
465 goto err;
466
467 }
468 if (!(flags & CMS_NO_CONTENT_VERIFY)) {
469 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
470 si = sk_CMS_SignerInfo_value(sinfos, i);
471 if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) {
472 CMSerror(CMS_R_CONTENT_VERIFY_ERROR);
473 goto err;
474 }
475 }
476 }
477
478 ret = 1;
479
480 err:
481 if (!(flags & SMIME_BINARY) && dcont) {
482 do_free_upto(cmsbio, tmpout);
483 if (tmpin != dcont)
484 BIO_free(tmpin);
485 } else {
486 if (dcont && (tmpin == dcont))
487 do_free_upto(cmsbio, dcont);
488 else
489 BIO_free_all(cmsbio);
490 }
491
492 if (out != tmpout)
493 BIO_free_all(tmpout);
494
495 err2:
496 sk_X509_pop_free(cms_certs, X509_free);
497 sk_X509_CRL_pop_free(crls, X509_CRL_free);
498
499 return ret;
500}
501LCRYPTO_ALIAS(CMS_verify);
502
503int
504CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
505 STACK_OF(X509) *certs, X509_STORE *store, unsigned int flags)
506{
507 int r;
508
509 flags &= ~(CMS_DETACHED | CMS_TEXT);
510 r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
511 if (r <= 0)
512 return r;
513
514 return cms_Receipt_verify(rcms, ocms);
515}
516LCRYPTO_ALIAS(CMS_verify_receipt);
517
518CMS_ContentInfo *
519CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs, BIO *data,
520 unsigned int flags)
521{
522 CMS_ContentInfo *cms;
523 int i;
524
525 cms = CMS_ContentInfo_new();
526 if (cms == NULL || !CMS_SignedData_init(cms))
527 goto merr;
528 if (flags & CMS_ASCIICRLF &&
529 !CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_ct_asciiTextWithCRLF)))
530 goto err;
531
532 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) {
533 CMSerror(CMS_R_ADD_SIGNER_ERROR);
534 goto err;
535 }
536
537 for (i = 0; i < sk_X509_num(certs); i++) {
538 X509 *x = sk_X509_value(certs, i);
539 if (!CMS_add1_cert(cms, x))
540 goto merr;
541 }
542
543 if (!(flags & CMS_DETACHED))
544 CMS_set_detached(cms, 0);
545
546 if ((flags & (CMS_STREAM | CMS_PARTIAL)) ||
547 CMS_final(cms, data, NULL, flags))
548 return cms;
549 else
550 goto err;
551
552 merr:
553 CMSerror(ERR_R_MALLOC_FAILURE);
554
555 err:
556 CMS_ContentInfo_free(cms);
557
558 return NULL;
559}
560LCRYPTO_ALIAS(CMS_sign);
561
562CMS_ContentInfo *
563CMS_sign_receipt(CMS_SignerInfo *si, X509 *signcert, EVP_PKEY *pkey,
564 STACK_OF(X509) *certs, unsigned int flags)
565{
566 CMS_SignerInfo *rct_si;
567 CMS_ContentInfo *cms = NULL;
568 ASN1_OCTET_STRING **pos, *os;
569 BIO *rct_cont = NULL;
570 int r = 0;
571
572 flags &= ~(CMS_STREAM | CMS_TEXT);
573 /* Not really detached but avoids content being allocated */
574 flags |= CMS_PARTIAL | CMS_BINARY | CMS_DETACHED;
575 if (!pkey || !signcert) {
576 CMSerror(CMS_R_NO_KEY_OR_CERT);
577 return NULL;
578 }
579
580 /* Initialize signed data */
581
582 cms = CMS_sign(NULL, NULL, certs, NULL, flags);
583 if (!cms)
584 goto err;
585
586 /* Set inner content type to signed receipt */
587 if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
588 goto err;
589
590 rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
591 if (!rct_si) {
592 CMSerror(CMS_R_ADD_SIGNER_ERROR);
593 goto err;
594 }
595
596 os = cms_encode_Receipt(si);
597 if (!os)
598 goto err;
599
600 /* Set content to digest */
601 rct_cont = BIO_new_mem_buf(os->data, os->length);
602 if (!rct_cont)
603 goto err;
604
605 /* Add msgSigDigest attribute */
606
607 if (!cms_msgSigDigest_add1(rct_si, si))
608 goto err;
609
610 /* Finalize structure */
611 if (!CMS_final(cms, rct_cont, NULL, flags))
612 goto err;
613
614 /* Set embedded content */
615 pos = CMS_get0_content(cms);
616 *pos = os;
617
618 r = 1;
619
620 err:
621 BIO_free(rct_cont);
622 if (r)
623 return cms;
624 CMS_ContentInfo_free(cms);
625
626 return NULL;
627}
628LCRYPTO_ALIAS(CMS_sign_receipt);
629
630CMS_ContentInfo *
631CMS_encrypt(STACK_OF(X509) *certs, BIO *data, const EVP_CIPHER *cipher,
632 unsigned int flags)
633{
634 CMS_ContentInfo *cms;
635 int i;
636 X509 *recip;
637
638 cms = CMS_EnvelopedData_create(cipher);
639 if (!cms)
640 goto merr;
641 for (i = 0; i < sk_X509_num(certs); i++) {
642 recip = sk_X509_value(certs, i);
643 if (!CMS_add1_recipient_cert(cms, recip, flags)) {
644 CMSerror(CMS_R_RECIPIENT_ERROR);
645 goto err;
646 }
647 }
648
649 if (!(flags & CMS_DETACHED))
650 CMS_set_detached(cms, 0);
651
652 if ((flags & (CMS_STREAM | CMS_PARTIAL)) ||
653 CMS_final(cms, data, NULL, flags))
654 return cms;
655 else
656 goto err;
657
658 merr:
659 CMSerror(ERR_R_MALLOC_FAILURE);
660 err:
661 CMS_ContentInfo_free(cms);
662
663 return NULL;
664}
665LCRYPTO_ALIAS(CMS_encrypt);
666
667static int
668cms_kari_set1_pkey(CMS_ContentInfo *cms, CMS_RecipientInfo *ri, EVP_PKEY *pk,
669 X509 *cert)
670{
671 int i;
672 STACK_OF(CMS_RecipientEncryptedKey) *reks;
673 CMS_RecipientEncryptedKey *rek;
674
675 reks = CMS_RecipientInfo_kari_get0_reks(ri);
676 for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++) {
677 int rv;
678
679 rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
680 if (cert != NULL && CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
681 continue;
682 CMS_RecipientInfo_kari_set0_pkey(ri, pk);
683 rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
684 CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
685 if (rv > 0)
686 return 1;
687 return cert == NULL ? 0 : -1;
688 }
689
690 return 0;
691}
692
693int
694CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
695{
696 STACK_OF(CMS_RecipientInfo) *ris;
697 CMS_RecipientInfo *ri;
698 int i, r, ri_type;
699 int debug = 0, match_ri = 0;
700
701 ris = CMS_get0_RecipientInfos(cms);
702 if (ris)
703 debug = cms->d.envelopedData->encryptedContentInfo->debug;
704 ri_type = cms_pkey_get_ri_type(pk);
705 if (ri_type == CMS_RECIPINFO_NONE) {
706 CMSerror(CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
707 return 0;
708 }
709
710 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
711 ri = sk_CMS_RecipientInfo_value(ris, i);
712 if (CMS_RecipientInfo_type(ri) != ri_type)
713 continue;
714 match_ri = 1;
715 if (ri_type == CMS_RECIPINFO_AGREE) {
716 r = cms_kari_set1_pkey(cms, ri, pk, cert);
717 if (r > 0)
718 return 1;
719 if (r < 0)
720 return 0;
721 }
722 /*
723 * If we have a cert try matching RecipientInfo otherwise try them
724 * all.
725 */
726 else if (!cert || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert)) {
727 EVP_PKEY_up_ref(pk);
728 CMS_RecipientInfo_set0_pkey(ri, pk);
729 r = CMS_RecipientInfo_decrypt(cms, ri);
730 CMS_RecipientInfo_set0_pkey(ri, NULL);
731 if (cert) {
732 /*
733 * If not debugging clear any error and return success to
734 * avoid leaking of information useful to MMA
735 */
736 if (!debug) {
737 ERR_clear_error();
738 return 1;
739 }
740 if (r > 0)
741 return 1;
742 CMSerror(CMS_R_DECRYPT_ERROR);
743 return 0;
744 }
745 /*
746 * If no cert and not debugging don't leave loop after first
747 * successful decrypt. Always attempt to decrypt all recipients
748 * to avoid leaking timing of a successful decrypt.
749 */
750 else if (r > 0 && debug)
751 return 1;
752 }
753 }
754 /* If no cert, key transport and not debugging always return success */
755 if (cert == NULL && ri_type == CMS_RECIPINFO_TRANS && match_ri && !debug) {
756 ERR_clear_error();
757 return 1;
758 }
759
760 CMSerror(CMS_R_NO_MATCHING_RECIPIENT);
761
762 return 0;
763}
764LCRYPTO_ALIAS(CMS_decrypt_set1_pkey);
765
766int
767CMS_decrypt_set1_key(CMS_ContentInfo *cms, unsigned char *key, size_t keylen,
768 const unsigned char *id, size_t idlen)
769{
770 STACK_OF(CMS_RecipientInfo) *ris;
771 CMS_RecipientInfo *ri;
772 int i, r;
773
774 ris = CMS_get0_RecipientInfos(cms);
775 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
776 ri = sk_CMS_RecipientInfo_value(ris, i);
777 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
778 continue;
779
780 /*
781 * If we have an id try matching RecipientInfo otherwise try them
782 * all.
783 */
784 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) {
785 CMS_RecipientInfo_set0_key(ri, key, keylen);
786 r = CMS_RecipientInfo_decrypt(cms, ri);
787 CMS_RecipientInfo_set0_key(ri, NULL, 0);
788 if (r > 0)
789 return 1;
790 if (id) {
791 CMSerror(CMS_R_DECRYPT_ERROR);
792 return 0;
793 }
794 ERR_clear_error();
795 }
796 }
797
798 CMSerror(CMS_R_NO_MATCHING_RECIPIENT);
799
800 return 0;
801}
802LCRYPTO_ALIAS(CMS_decrypt_set1_key);
803
804int
805CMS_decrypt_set1_password(CMS_ContentInfo *cms, unsigned char *pass,
806 ssize_t passlen)
807{
808 STACK_OF(CMS_RecipientInfo) *ris;
809 CMS_RecipientInfo *ri;
810 int i, r;
811
812 ris = CMS_get0_RecipientInfos(cms);
813 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
814 ri = sk_CMS_RecipientInfo_value(ris, i);
815 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
816 continue;
817 CMS_RecipientInfo_set0_password(ri, pass, passlen);
818 r = CMS_RecipientInfo_decrypt(cms, ri);
819 CMS_RecipientInfo_set0_password(ri, NULL, 0);
820 if (r > 0)
821 return 1;
822 }
823
824 CMSerror(CMS_R_NO_MATCHING_RECIPIENT);
825
826 return 0;
827}
828LCRYPTO_ALIAS(CMS_decrypt_set1_password);
829
830int
831CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert, BIO *dcont,
832 BIO *out, unsigned int flags)
833{
834 int r;
835 BIO *cont;
836
837 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) {
838 CMSerror(CMS_R_TYPE_NOT_ENVELOPED_DATA);
839 return 0;
840 }
841 if (!dcont && !check_content(cms))
842 return 0;
843 if (flags & CMS_DEBUG_DECRYPT)
844 cms->d.envelopedData->encryptedContentInfo->debug = 1;
845 else
846 cms->d.envelopedData->encryptedContentInfo->debug = 0;
847 if (!cert)
848 cms->d.envelopedData->encryptedContentInfo->havenocert = 1;
849 else
850 cms->d.envelopedData->encryptedContentInfo->havenocert = 0;
851 if (!pk && !cert && !dcont && !out)
852 return 1;
853 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
854 return 0;
855 cont = CMS_dataInit(cms, dcont);
856 if (!cont)
857 return 0;
858 r = cms_copy_content(out, cont, flags);
859 do_free_upto(cont, dcont);
860
861 return r;
862}
863LCRYPTO_ALIAS(CMS_decrypt);
864
865int
866CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
867{
868 BIO *cmsbio;
869 int ret = 0;
870
871 if ((cmsbio = CMS_dataInit(cms, dcont)) == NULL) {
872 CMSerror(CMS_R_CMS_LIB);
873 return 0;
874 }
875
876 SMIME_crlf_copy(data, cmsbio, flags);
877
878 (void)BIO_flush(cmsbio);
879
880 if (!CMS_dataFinal(cms, cmsbio)) {
881 CMSerror(CMS_R_CMS_DATAFINAL_ERROR);
882 goto err;
883 }
884
885 ret = 1;
886
887 err:
888 do_free_upto(cmsbio, dcont);
889
890 return ret;
891}
892LCRYPTO_ALIAS(CMS_final);
893
894int
895CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags)
896{
897 CMSerror(CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
898 return 0;
899}
900LCRYPTO_ALIAS(CMS_uncompress);
901
902CMS_ContentInfo *
903CMS_compress(BIO *in, int comp_nid, unsigned int flags)
904{
905 CMSerror(CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
906 return NULL;
907}
908LCRYPTO_ALIAS(CMS_compress);
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-05-06 15:56:48 +0000