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Diffstat (limited to 'src/lib/libcrypto/cms/cms_smime.c')
-rw-r--r--src/lib/libcrypto/cms/cms_smime.c843
1 files changed, 843 insertions, 0 deletions
diff --git a/src/lib/libcrypto/cms/cms_smime.c b/src/lib/libcrypto/cms/cms_smime.c
new file mode 100644
index 0000000000..5dcf803f4b
--- /dev/null
+++ b/src/lib/libcrypto/cms/cms_smime.c
@@ -0,0 +1,843 @@
1/*
2 * Copyright 2008-2018 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_lcl.h"
17#include "internal/asn1_int.h"
18
19static 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
32static 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
78static 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
88static 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
102int 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
118CMS_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
133int 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
156CMS_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
176int 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
201CMS_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
227static 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
265int 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
423int 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
435CMS_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
478CMS_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
546CMS_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
579static 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
601int 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
672int 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
708int 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
731int 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 (!pk && !cert && !dcont && !out)
747 return 1;
748 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
749 return 0;
750 cont = CMS_dataInit(cms, dcont);
751 if (!cont)
752 return 0;
753 r = cms_copy_content(out, cont, flags);
754 do_free_upto(cont, dcont);
755 return r;
756}
757
758int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
759{
760 BIO *cmsbio;
761 int ret = 0;
762
763 if ((cmsbio = CMS_dataInit(cms, dcont)) == NULL) {
764 CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_LIB);
765 return 0;
766 }
767
768 SMIME_crlf_copy(data, cmsbio, flags);
769
770 (void)BIO_flush(cmsbio);
771
772 if (!CMS_dataFinal(cms, cmsbio)) {
773 CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_DATAFINAL_ERROR);
774 goto err;
775 }
776
777 ret = 1;
778
779 err:
780 do_free_upto(cmsbio, dcont);
781
782 return ret;
783
784}
785
786#ifdef ZLIB
787
788int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
789 unsigned int flags)
790{
791 BIO *cont;
792 int r;
793 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData) {
794 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_TYPE_NOT_COMPRESSED_DATA);
795 return 0;
796 }
797
798 if (!dcont && !check_content(cms))
799 return 0;
800
801 cont = CMS_dataInit(cms, dcont);
802 if (!cont)
803 return 0;
804 r = cms_copy_content(out, cont, flags);
805 do_free_upto(cont, dcont);
806 return r;
807}
808
809CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
810{
811 CMS_ContentInfo *cms;
812 if (comp_nid <= 0)
813 comp_nid = NID_zlib_compression;
814 cms = cms_CompressedData_create(comp_nid);
815 if (!cms)
816 return NULL;
817
818 if (!(flags & CMS_DETACHED))
819 CMS_set_detached(cms, 0);
820
821 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
822 return cms;
823
824 CMS_ContentInfo_free(cms);
825 return NULL;
826}
827
828#else
829
830int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
831 unsigned int flags)
832{
833 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
834 return 0;
835}
836
837CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
838{
839 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
840 return NULL;
841}
842
843#endif
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-18 20:27:55 +0000