1 /* crypto/cms/cms_smime.c */
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 "cryptlib.h"
56 #include <openssl/asn1t.h>
57 #include <openssl/x509.h>
58 #include <openssl/x509v3.h>
59 #include <openssl/err.h>
60 #include <openssl/cms.h>
61 #include "cms_lcl.h"
62
cms_copy_content(BIO * out,BIO * in,unsigned int flags)63 static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
64 {
65 unsigned char buf[4096];
66 int r = 0, i;
67 BIO *tmpout = NULL;
68
69 if (out == NULL)
70 tmpout = BIO_new(BIO_s_null());
71 else if (flags & CMS_TEXT) {
72 tmpout = BIO_new(BIO_s_mem());
73 BIO_set_mem_eof_return(tmpout, 0);
74 } else
75 tmpout = out;
76
77 if (!tmpout) {
78 CMSerr(CMS_F_CMS_COPY_CONTENT, ERR_R_MALLOC_FAILURE);
79 goto err;
80 }
81
82 /* Read all content through chain to process digest, decrypt etc */
83 for (;;) {
84 i = BIO_read(in, buf, sizeof(buf));
85 if (i <= 0) {
86 if (BIO_method_type(in) == BIO_TYPE_CIPHER) {
87 if (!BIO_get_cipher_status(in))
88 goto err;
89 }
90 if (i < 0)
91 goto err;
92 break;
93 }
94
95 if (tmpout && (BIO_write(tmpout, buf, i) != i))
96 goto err;
97 }
98
99 if (flags & CMS_TEXT) {
100 if (!SMIME_text(tmpout, out)) {
101 CMSerr(CMS_F_CMS_COPY_CONTENT, CMS_R_SMIME_TEXT_ERROR);
102 goto err;
103 }
104 }
105
106 r = 1;
107
108 err:
109 if (tmpout && (tmpout != out))
110 BIO_free(tmpout);
111 return r;
112
113 }
114
check_content(CMS_ContentInfo * cms)115 static int check_content(CMS_ContentInfo *cms)
116 {
117 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
118 if (!pos || !*pos) {
119 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
120 return 0;
121 }
122 return 1;
123 }
124
do_free_upto(BIO * f,BIO * upto)125 static void do_free_upto(BIO *f, BIO *upto)
126 {
127 if (upto) {
128 BIO *tbio;
129 do {
130 tbio = BIO_pop(f);
131 BIO_free(f);
132 f = tbio;
133 }
134 while (f && f != upto);
135 } else
136 BIO_free_all(f);
137 }
138
CMS_data(CMS_ContentInfo * cms,BIO * out,unsigned int flags)139 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
140 {
141 BIO *cont;
142 int r;
143 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data) {
144 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
145 return 0;
146 }
147 cont = CMS_dataInit(cms, NULL);
148 if (!cont)
149 return 0;
150 r = cms_copy_content(out, cont, flags);
151 BIO_free_all(cont);
152 return r;
153 }
154
CMS_data_create(BIO * in,unsigned int flags)155 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
156 {
157 CMS_ContentInfo *cms;
158 cms = cms_Data_create();
159 if (!cms)
160 return NULL;
161
162 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
163 return cms;
164
165 CMS_ContentInfo_free(cms);
166
167 return NULL;
168 }
169
CMS_digest_verify(CMS_ContentInfo * cms,BIO * dcont,BIO * out,unsigned int flags)170 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
171 unsigned int flags)
172 {
173 BIO *cont;
174 int r;
175 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest) {
176 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
177 return 0;
178 }
179
180 if (!dcont && !check_content(cms))
181 return 0;
182
183 cont = CMS_dataInit(cms, dcont);
184 if (!cont)
185 return 0;
186 r = cms_copy_content(out, cont, flags);
187 if (r)
188 r = cms_DigestedData_do_final(cms, cont, 1);
189 do_free_upto(cont, dcont);
190 return r;
191 }
192
CMS_digest_create(BIO * in,const EVP_MD * md,unsigned int flags)193 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
194 unsigned int flags)
195 {
196 CMS_ContentInfo *cms;
197 if (!md)
198 md = EVP_sha1();
199 cms = cms_DigestedData_create(md);
200 if (!cms)
201 return NULL;
202
203 if (!(flags & CMS_DETACHED))
204 CMS_set_detached(cms, 0);
205
206 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
207 return cms;
208
209 CMS_ContentInfo_free(cms);
210 return NULL;
211 }
212
CMS_EncryptedData_decrypt(CMS_ContentInfo * cms,const unsigned char * key,size_t keylen,BIO * dcont,BIO * out,unsigned int flags)213 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
214 const unsigned char *key, size_t keylen,
215 BIO *dcont, BIO *out, unsigned int flags)
216 {
217 BIO *cont;
218 int r;
219 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted) {
220 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
221 CMS_R_TYPE_NOT_ENCRYPTED_DATA);
222 return 0;
223 }
224
225 if (!dcont && !check_content(cms))
226 return 0;
227
228 if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
229 return 0;
230 cont = CMS_dataInit(cms, dcont);
231 if (!cont)
232 return 0;
233 r = cms_copy_content(out, cont, flags);
234 do_free_upto(cont, dcont);
235 return r;
236 }
237
CMS_EncryptedData_encrypt(BIO * in,const EVP_CIPHER * cipher,const unsigned char * key,size_t keylen,unsigned int flags)238 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
239 const unsigned char *key,
240 size_t keylen, unsigned int flags)
241 {
242 CMS_ContentInfo *cms;
243 if (!cipher) {
244 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
245 return NULL;
246 }
247 cms = CMS_ContentInfo_new();
248 if (!cms)
249 return NULL;
250 if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
251 return NULL;
252
253 if (!(flags & CMS_DETACHED))
254 CMS_set_detached(cms, 0);
255
256 if ((flags & (CMS_STREAM | CMS_PARTIAL))
257 || CMS_final(cms, in, NULL, flags))
258 return cms;
259
260 CMS_ContentInfo_free(cms);
261 return NULL;
262 }
263
cms_signerinfo_verify_cert(CMS_SignerInfo * si,X509_STORE * store,STACK_OF (X509)* certs,STACK_OF (X509_CRL)* crls,unsigned int flags)264 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
265 X509_STORE *store,
266 STACK_OF(X509) *certs,
267 STACK_OF(X509_CRL) *crls,
268 unsigned int flags)
269 {
270 X509_STORE_CTX ctx;
271 X509 *signer;
272 int i, j, r = 0;
273 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
274 if (!X509_STORE_CTX_init(&ctx, store, signer, certs)) {
275 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, CMS_R_STORE_INIT_ERROR);
276 goto err;
277 }
278 X509_STORE_CTX_set_default(&ctx, "smime_sign");
279 if (crls)
280 X509_STORE_CTX_set0_crls(&ctx, crls);
281
282 i = X509_verify_cert(&ctx);
283 if (i <= 0) {
284 j = X509_STORE_CTX_get_error(&ctx);
285 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
286 CMS_R_CERTIFICATE_VERIFY_ERROR);
287 ERR_add_error_data(2, "Verify error:",
288 X509_verify_cert_error_string(j));
289 goto err;
290 }
291 r = 1;
292 err:
293 X509_STORE_CTX_cleanup(&ctx);
294 return r;
295
296 }
297
CMS_verify(CMS_ContentInfo * cms,STACK_OF (X509)* certs,X509_STORE * store,BIO * dcont,BIO * out,unsigned int flags)298 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
299 X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
300 {
301 CMS_SignerInfo *si;
302 STACK_OF(CMS_SignerInfo) *sinfos;
303 STACK_OF(X509) *cms_certs = NULL;
304 STACK_OF(X509_CRL) *crls = NULL;
305 X509 *signer;
306 int i, scount = 0, ret = 0;
307 BIO *cmsbio = NULL, *tmpin = NULL;
308
309 if (!dcont && !check_content(cms))
310 return 0;
311
312 /* Attempt to find all signer certificates */
313
314 sinfos = CMS_get0_SignerInfos(cms);
315
316 if (sk_CMS_SignerInfo_num(sinfos) <= 0) {
317 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
318 goto err;
319 }
320
321 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
322 si = sk_CMS_SignerInfo_value(sinfos, i);
323 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
324 if (signer)
325 scount++;
326 }
327
328 if (scount != sk_CMS_SignerInfo_num(sinfos))
329 scount += CMS_set1_signers_certs(cms, certs, flags);
330
331 if (scount != sk_CMS_SignerInfo_num(sinfos)) {
332 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
333 goto err;
334 }
335
336 /* Attempt to verify all signers certs */
337
338 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) {
339 cms_certs = CMS_get1_certs(cms);
340 if (!(flags & CMS_NOCRL))
341 crls = CMS_get1_crls(cms);
342 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
343 si = sk_CMS_SignerInfo_value(sinfos, i);
344 if (!cms_signerinfo_verify_cert(si, store,
345 cms_certs, crls, flags))
346 goto err;
347 }
348 }
349
350 /* Attempt to verify all SignerInfo signed attribute signatures */
351
352 if (!(flags & CMS_NO_ATTR_VERIFY)) {
353 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
354 si = sk_CMS_SignerInfo_value(sinfos, i);
355 if (CMS_signed_get_attr_count(si) < 0)
356 continue;
357 if (CMS_SignerInfo_verify(si) <= 0)
358 goto err;
359 }
360 }
361
362 /*
363 * Performance optimization: if the content is a memory BIO then store
364 * its contents in a temporary read only memory BIO. This avoids
365 * potentially large numbers of slow copies of data which will occur when
366 * reading from a read write memory BIO when signatures are calculated.
367 */
368
369 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) {
370 char *ptr;
371 long len;
372 len = BIO_get_mem_data(dcont, &ptr);
373 tmpin = BIO_new_mem_buf(ptr, len);
374 if (tmpin == NULL) {
375 CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
376 return 0;
377 }
378 } else
379 tmpin = dcont;
380
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 if (!(flags & CMS_NO_CONTENT_VERIFY)) {
389 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
390 si = sk_CMS_SignerInfo_value(sinfos, i);
391 if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) {
392 CMSerr(CMS_F_CMS_VERIFY, CMS_R_CONTENT_VERIFY_ERROR);
393 goto err;
394 }
395 }
396 }
397
398 ret = 1;
399
400 err:
401
402 if (dcont && (tmpin == dcont))
403 do_free_upto(cmsbio, dcont);
404 else
405 BIO_free_all(cmsbio);
406
407 if (cms_certs)
408 sk_X509_pop_free(cms_certs, X509_free);
409 if (crls)
410 sk_X509_CRL_pop_free(crls, X509_CRL_free);
411
412 return ret;
413 }
414
CMS_verify_receipt(CMS_ContentInfo * rcms,CMS_ContentInfo * ocms,STACK_OF (X509)* certs,X509_STORE * store,unsigned int flags)415 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
416 STACK_OF(X509) *certs,
417 X509_STORE *store, unsigned int flags)
418 {
419 int r;
420 flags &= ~(CMS_DETACHED | CMS_TEXT);
421 r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
422 if (r <= 0)
423 return r;
424 return cms_Receipt_verify(rcms, ocms);
425 }
426
CMS_sign(X509 * signcert,EVP_PKEY * pkey,STACK_OF (X509)* certs,BIO * data,unsigned int flags)427 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey,
428 STACK_OF(X509) *certs, BIO *data,
429 unsigned int flags)
430 {
431 CMS_ContentInfo *cms;
432 int i;
433
434 cms = CMS_ContentInfo_new();
435 if (!cms || !CMS_SignedData_init(cms))
436 goto merr;
437
438 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) {
439 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
440 goto err;
441 }
442
443 for (i = 0; i < sk_X509_num(certs); i++) {
444 X509 *x = sk_X509_value(certs, i);
445 if (!CMS_add1_cert(cms, x))
446 goto merr;
447 }
448
449 if (!(flags & CMS_DETACHED))
450 CMS_set_detached(cms, 0);
451
452 if ((flags & (CMS_STREAM | CMS_PARTIAL))
453 || CMS_final(cms, data, NULL, flags))
454 return cms;
455 else
456 goto err;
457
458 merr:
459 CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
460
461 err:
462 if (cms)
463 CMS_ContentInfo_free(cms);
464 return NULL;
465 }
466
CMS_sign_receipt(CMS_SignerInfo * si,X509 * signcert,EVP_PKEY * pkey,STACK_OF (X509)* certs,unsigned int flags)467 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
468 X509 *signcert, EVP_PKEY *pkey,
469 STACK_OF(X509) *certs, unsigned int flags)
470 {
471 CMS_SignerInfo *rct_si;
472 CMS_ContentInfo *cms = NULL;
473 ASN1_OCTET_STRING **pos, *os;
474 BIO *rct_cont = NULL;
475 int r = 0;
476
477 flags &= ~(CMS_STREAM | CMS_TEXT);
478 /* Not really detached but avoids content being allocated */
479 flags |= CMS_PARTIAL | CMS_BINARY | CMS_DETACHED;
480 if (!pkey || !signcert) {
481 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
482 return NULL;
483 }
484
485 /* Initialize signed data */
486
487 cms = CMS_sign(NULL, NULL, certs, NULL, flags);
488 if (!cms)
489 goto err;
490
491 /* Set inner content type to signed receipt */
492 if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
493 goto err;
494
495 rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
496 if (!rct_si) {
497 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
498 goto err;
499 }
500
501 os = cms_encode_Receipt(si);
502
503 if (!os)
504 goto err;
505
506 /* Set content to digest */
507 rct_cont = BIO_new_mem_buf(os->data, os->length);
508 if (!rct_cont)
509 goto err;
510
511 /* Add msgSigDigest attribute */
512
513 if (!cms_msgSigDigest_add1(rct_si, si))
514 goto err;
515
516 /* Finalize structure */
517 if (!CMS_final(cms, rct_cont, NULL, flags))
518 goto err;
519
520 /* Set embedded content */
521 pos = CMS_get0_content(cms);
522 *pos = os;
523
524 r = 1;
525
526 err:
527 if (rct_cont)
528 BIO_free(rct_cont);
529 if (r)
530 return cms;
531 CMS_ContentInfo_free(cms);
532 return NULL;
533
534 }
535
CMS_encrypt(STACK_OF (X509)* certs,BIO * data,const EVP_CIPHER * cipher,unsigned int flags)536 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
537 const EVP_CIPHER *cipher, unsigned int flags)
538 {
539 CMS_ContentInfo *cms;
540 int i;
541 X509 *recip;
542 cms = CMS_EnvelopedData_create(cipher);
543 if (!cms)
544 goto merr;
545 for (i = 0; i < sk_X509_num(certs); i++) {
546 recip = sk_X509_value(certs, i);
547 if (!CMS_add1_recipient_cert(cms, recip, flags)) {
548 CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
549 goto err;
550 }
551 }
552
553 if (!(flags & CMS_DETACHED))
554 CMS_set_detached(cms, 0);
555
556 if ((flags & (CMS_STREAM | CMS_PARTIAL))
557 || CMS_final(cms, data, NULL, flags))
558 return cms;
559 else
560 goto err;
561
562 merr:
563 CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
564 err:
565 if (cms)
566 CMS_ContentInfo_free(cms);
567 return NULL;
568 }
569
CMS_decrypt_set1_pkey(CMS_ContentInfo * cms,EVP_PKEY * pk,X509 * cert)570 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
571 {
572 STACK_OF(CMS_RecipientInfo) *ris;
573 CMS_RecipientInfo *ri;
574 int i, r;
575 int debug = 0, ri_match = 0;
576 ris = CMS_get0_RecipientInfos(cms);
577 if (ris)
578 debug = cms->d.envelopedData->encryptedContentInfo->debug;
579 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
580 ri = sk_CMS_RecipientInfo_value(ris, i);
581 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
582 continue;
583 ri_match = 1;
584 /*
585 * If we have a cert try matching RecipientInfo otherwise try them
586 * all.
587 */
588 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0)) {
589 CMS_RecipientInfo_set0_pkey(ri, pk);
590 r = CMS_RecipientInfo_decrypt(cms, ri);
591 CMS_RecipientInfo_set0_pkey(ri, NULL);
592 if (cert) {
593 /*
594 * If not debugging clear any error and return success to
595 * avoid leaking of information useful to MMA
596 */
597 if (!debug) {
598 ERR_clear_error();
599 return 1;
600 }
601 if (r > 0)
602 return 1;
603 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_DECRYPT_ERROR);
604 return 0;
605 }
606 /*
607 * If no cert and not debugging don't leave loop after first
608 * successful decrypt. Always attempt to decrypt all recipients
609 * to avoid leaking timing of a successful decrypt.
610 */
611 else if (r > 0 && debug)
612 return 1;
613 }
614 }
615 /* If no cert and not debugging always return success */
616 if (ri_match && !cert && !debug) {
617 ERR_clear_error();
618 return 1;
619 }
620
621 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
622 return 0;
623
624 }
625
CMS_decrypt_set1_key(CMS_ContentInfo * cms,unsigned char * key,size_t keylen,unsigned char * id,size_t idlen)626 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
627 unsigned char *key, size_t keylen,
628 unsigned char *id, size_t idlen)
629 {
630 STACK_OF(CMS_RecipientInfo) *ris;
631 CMS_RecipientInfo *ri;
632 int i, r;
633 ris = CMS_get0_RecipientInfos(cms);
634 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
635 ri = sk_CMS_RecipientInfo_value(ris, i);
636 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
637 continue;
638
639 /*
640 * If we have an id try matching RecipientInfo otherwise try them
641 * all.
642 */
643 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) {
644 CMS_RecipientInfo_set0_key(ri, key, keylen);
645 r = CMS_RecipientInfo_decrypt(cms, ri);
646 CMS_RecipientInfo_set0_key(ri, NULL, 0);
647 if (r > 0)
648 return 1;
649 if (id) {
650 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_DECRYPT_ERROR);
651 return 0;
652 }
653 ERR_clear_error();
654 }
655 }
656
657 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
658 return 0;
659
660 }
661
CMS_decrypt_set1_password(CMS_ContentInfo * cms,unsigned char * pass,ossl_ssize_t passlen)662 int CMS_decrypt_set1_password(CMS_ContentInfo *cms,
663 unsigned char *pass, ossl_ssize_t passlen)
664 {
665 STACK_OF(CMS_RecipientInfo) *ris;
666 CMS_RecipientInfo *ri;
667 int i, r;
668 ris = CMS_get0_RecipientInfos(cms);
669 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
670 ri = sk_CMS_RecipientInfo_value(ris, i);
671 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
672 continue;
673 CMS_RecipientInfo_set0_password(ri, pass, passlen);
674 r = CMS_RecipientInfo_decrypt(cms, ri);
675 CMS_RecipientInfo_set0_password(ri, NULL, 0);
676 if (r > 0)
677 return 1;
678 }
679
680 CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
681 return 0;
682
683 }
684
CMS_decrypt(CMS_ContentInfo * cms,EVP_PKEY * pk,X509 * cert,BIO * dcont,BIO * out,unsigned int flags)685 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
686 BIO *dcont, BIO *out, unsigned int flags)
687 {
688 int r;
689 BIO *cont;
690 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) {
691 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
692 return 0;
693 }
694 if (!dcont && !check_content(cms))
695 return 0;
696 if (flags & CMS_DEBUG_DECRYPT)
697 cms->d.envelopedData->encryptedContentInfo->debug = 1;
698 else
699 cms->d.envelopedData->encryptedContentInfo->debug = 0;
700 if (!pk && !cert && !dcont && !out)
701 return 1;
702 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
703 return 0;
704 cont = CMS_dataInit(cms, dcont);
705 if (!cont)
706 return 0;
707 r = cms_copy_content(out, cont, flags);
708 do_free_upto(cont, dcont);
709 return r;
710 }
711
CMS_final(CMS_ContentInfo * cms,BIO * data,BIO * dcont,unsigned int flags)712 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
713 {
714 BIO *cmsbio;
715 int ret = 0;
716 if (!(cmsbio = CMS_dataInit(cms, dcont))) {
717 CMSerr(CMS_F_CMS_FINAL, ERR_R_MALLOC_FAILURE);
718 return 0;
719 }
720
721 SMIME_crlf_copy(data, cmsbio, flags);
722
723 (void)BIO_flush(cmsbio);
724
725 if (!CMS_dataFinal(cms, cmsbio)) {
726 CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_DATAFINAL_ERROR);
727 goto err;
728 }
729
730 ret = 1;
731
732 err:
733 do_free_upto(cmsbio, dcont);
734
735 return ret;
736
737 }
738
739 #ifdef ZLIB
740
CMS_uncompress(CMS_ContentInfo * cms,BIO * dcont,BIO * out,unsigned int flags)741 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
742 unsigned int flags)
743 {
744 BIO *cont;
745 int r;
746 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData) {
747 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_TYPE_NOT_COMPRESSED_DATA);
748 return 0;
749 }
750
751 if (!dcont && !check_content(cms))
752 return 0;
753
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
CMS_compress(BIO * in,int comp_nid,unsigned int flags)762 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
763 {
764 CMS_ContentInfo *cms;
765 if (comp_nid <= 0)
766 comp_nid = NID_zlib_compression;
767 cms = cms_CompressedData_create(comp_nid);
768 if (!cms)
769 return NULL;
770
771 if (!(flags & CMS_DETACHED))
772 CMS_set_detached(cms, 0);
773
774 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
775 return cms;
776
777 CMS_ContentInfo_free(cms);
778 return NULL;
779 }
780
781 #else
782
CMS_uncompress(CMS_ContentInfo * cms,BIO * dcont,BIO * out,unsigned int flags)783 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
784 unsigned int flags)
785 {
786 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
787 return 0;
788 }
789
CMS_compress(BIO * in,int comp_nid,unsigned int flags)790 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
791 {
792 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
793 return NULL;
794 }
795
796 #endif
797