1 /*
2 * Copyright 2008-2023 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
cms_get_text_bio(BIO * out,unsigned int flags)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
cms_copy_content(BIO * out,BIO * in,unsigned int flags)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
check_content(CMS_ContentInfo * cms)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
do_free_upto(BIO * f,BIO * upto)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
CMS_data(CMS_ContentInfo * cms,BIO * out,unsigned int flags)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
CMS_data_create(BIO * in,unsigned int flags)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
CMS_digest_verify(CMS_ContentInfo * cms,BIO * dcont,BIO * out,unsigned int flags)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
CMS_digest_create(BIO * in,const EVP_MD * md,unsigned int flags)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
CMS_EncryptedData_decrypt(CMS_ContentInfo * cms,const unsigned char * key,size_t keylen,BIO * dcont,BIO * out,unsigned int flags)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
CMS_EncryptedData_encrypt(BIO * in,const EVP_CIPHER * cipher,const unsigned char * key,size_t keylen,unsigned int flags)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 goto err;
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 err:
224 CMS_ContentInfo_free(cms);
225 return NULL;
226 }
227
cms_signerinfo_verify_cert(CMS_SignerInfo * si,X509_STORE * store,STACK_OF (X509)* certs,STACK_OF (X509_CRL)* crls)228 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
229 X509_STORE *store,
230 STACK_OF(X509) *certs,
231 STACK_OF(X509_CRL) *crls)
232 {
233 X509_STORE_CTX *ctx = X509_STORE_CTX_new();
234 X509 *signer;
235 int i, j, r = 0;
236
237 if (ctx == NULL) {
238 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, ERR_R_MALLOC_FAILURE);
239 goto err;
240 }
241 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
242 if (!X509_STORE_CTX_init(ctx, store, signer, certs)) {
243 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, CMS_R_STORE_INIT_ERROR);
244 goto err;
245 }
246 X509_STORE_CTX_set_default(ctx, "smime_sign");
247 if (crls)
248 X509_STORE_CTX_set0_crls(ctx, crls);
249
250 i = X509_verify_cert(ctx);
251 if (i <= 0) {
252 j = X509_STORE_CTX_get_error(ctx);
253 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
254 CMS_R_CERTIFICATE_VERIFY_ERROR);
255 ERR_add_error_data(2, "Verify error:",
256 X509_verify_cert_error_string(j));
257 goto err;
258 }
259 r = 1;
260 err:
261 X509_STORE_CTX_free(ctx);
262 return r;
263
264 }
265
CMS_verify(CMS_ContentInfo * cms,STACK_OF (X509)* certs,X509_STORE * store,BIO * dcont,BIO * out,unsigned int flags)266 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
267 X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
268 {
269 CMS_SignerInfo *si;
270 STACK_OF(CMS_SignerInfo) *sinfos;
271 STACK_OF(X509) *cms_certs = NULL;
272 STACK_OF(X509_CRL) *crls = NULL;
273 X509 *signer;
274 int i, scount = 0, ret = 0;
275 BIO *cmsbio = NULL, *tmpin = NULL, *tmpout = NULL;
276
277 if (!dcont && !check_content(cms))
278 return 0;
279 if (dcont && !(flags & CMS_BINARY)) {
280 const ASN1_OBJECT *coid = CMS_get0_eContentType(cms);
281 if (OBJ_obj2nid(coid) == NID_id_ct_asciiTextWithCRLF)
282 flags |= CMS_ASCIICRLF;
283 }
284
285 /* Attempt to find all signer certificates */
286
287 sinfos = CMS_get0_SignerInfos(cms);
288
289 if (sk_CMS_SignerInfo_num(sinfos) <= 0) {
290 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
291 goto err;
292 }
293
294 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
295 si = sk_CMS_SignerInfo_value(sinfos, i);
296 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
297 if (signer)
298 scount++;
299 }
300
301 if (scount != sk_CMS_SignerInfo_num(sinfos))
302 scount += CMS_set1_signers_certs(cms, certs, flags);
303
304 if (scount != sk_CMS_SignerInfo_num(sinfos)) {
305 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
306 goto err;
307 }
308
309 /* Attempt to verify all signers certs */
310
311 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) {
312 cms_certs = CMS_get1_certs(cms);
313 if (!(flags & CMS_NOCRL))
314 crls = CMS_get1_crls(cms);
315 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
316 si = sk_CMS_SignerInfo_value(sinfos, i);
317 if (!cms_signerinfo_verify_cert(si, store, cms_certs, crls))
318 goto err;
319 }
320 }
321
322 /* Attempt to verify all SignerInfo signed attribute signatures */
323
324 if (!(flags & CMS_NO_ATTR_VERIFY)) {
325 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
326 si = sk_CMS_SignerInfo_value(sinfos, i);
327 if (CMS_signed_get_attr_count(si) < 0)
328 continue;
329 if (CMS_SignerInfo_verify(si) <= 0)
330 goto err;
331 }
332 }
333
334 /*
335 * Performance optimization: if the content is a memory BIO then store
336 * its contents in a temporary read only memory BIO. This avoids
337 * potentially large numbers of slow copies of data which will occur when
338 * reading from a read write memory BIO when signatures are calculated.
339 */
340
341 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) {
342 char *ptr;
343 long len;
344 len = BIO_get_mem_data(dcont, &ptr);
345 tmpin = (len == 0) ? dcont : BIO_new_mem_buf(ptr, len);
346 if (tmpin == NULL) {
347 CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
348 goto err2;
349 }
350 } else
351 tmpin = dcont;
352 /*
353 * If not binary mode and detached generate digests by *writing* through
354 * the BIO. That makes it possible to canonicalise the input.
355 */
356 if (!(flags & SMIME_BINARY) && dcont) {
357 /*
358 * Create output BIO so we can either handle text or to ensure
359 * included content doesn't override detached content.
360 */
361 tmpout = cms_get_text_bio(out, flags);
362 if (!tmpout) {
363 CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
364 goto err;
365 }
366 cmsbio = CMS_dataInit(cms, tmpout);
367 if (!cmsbio)
368 goto err;
369 /*
370 * Don't use SMIME_TEXT for verify: it adds headers and we want to
371 * remove them.
372 */
373 SMIME_crlf_copy(dcont, cmsbio, flags & ~SMIME_TEXT);
374
375 if (flags & CMS_TEXT) {
376 if (!SMIME_text(tmpout, out)) {
377 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SMIME_TEXT_ERROR);
378 goto err;
379 }
380 }
381 } else {
382 cmsbio = CMS_dataInit(cms, tmpin);
383 if (!cmsbio)
384 goto err;
385
386 if (!cms_copy_content(out, cmsbio, flags))
387 goto err;
388
389 }
390 if (!(flags & CMS_NO_CONTENT_VERIFY)) {
391 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
392 si = sk_CMS_SignerInfo_value(sinfos, i);
393 if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) {
394 CMSerr(CMS_F_CMS_VERIFY, CMS_R_CONTENT_VERIFY_ERROR);
395 goto err;
396 }
397 }
398 }
399
400 ret = 1;
401
402 err:
403 if (!(flags & SMIME_BINARY) && dcont) {
404 do_free_upto(cmsbio, tmpout);
405 if (tmpin != dcont)
406 BIO_free(tmpin);
407 } else {
408 if (dcont && (tmpin == dcont))
409 do_free_upto(cmsbio, dcont);
410 else
411 BIO_free_all(cmsbio);
412 }
413
414 if (out != tmpout)
415 BIO_free_all(tmpout);
416
417 err2:
418 sk_X509_pop_free(cms_certs, X509_free);
419 sk_X509_CRL_pop_free(crls, X509_CRL_free);
420
421 return ret;
422 }
423
CMS_verify_receipt(CMS_ContentInfo * rcms,CMS_ContentInfo * ocms,STACK_OF (X509)* certs,X509_STORE * store,unsigned int flags)424 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
425 STACK_OF(X509) *certs,
426 X509_STORE *store, unsigned int flags)
427 {
428 int r;
429 flags &= ~(CMS_DETACHED | CMS_TEXT);
430 r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
431 if (r <= 0)
432 return r;
433 return cms_Receipt_verify(rcms, ocms);
434 }
435
CMS_sign(X509 * signcert,EVP_PKEY * pkey,STACK_OF (X509)* certs,BIO * data,unsigned int flags)436 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey,
437 STACK_OF(X509) *certs, BIO *data,
438 unsigned int flags)
439 {
440 CMS_ContentInfo *cms;
441 int i;
442
443 cms = CMS_ContentInfo_new();
444 if (cms == NULL || !CMS_SignedData_init(cms))
445 goto merr;
446 if (flags & CMS_ASCIICRLF
447 && !CMS_set1_eContentType(cms,
448 OBJ_nid2obj(NID_id_ct_asciiTextWithCRLF)))
449 goto err;
450
451 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) {
452 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
453 goto err;
454 }
455
456 for (i = 0; i < sk_X509_num(certs); i++) {
457 X509 *x = sk_X509_value(certs, i);
458 if (!CMS_add1_cert(cms, x))
459 goto merr;
460 }
461
462 if (!(flags & CMS_DETACHED))
463 CMS_set_detached(cms, 0);
464
465 if ((flags & (CMS_STREAM | CMS_PARTIAL))
466 || CMS_final(cms, data, NULL, flags))
467 return cms;
468 else
469 goto err;
470
471 merr:
472 CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
473
474 err:
475 CMS_ContentInfo_free(cms);
476 return NULL;
477 }
478
CMS_sign_receipt(CMS_SignerInfo * si,X509 * signcert,EVP_PKEY * pkey,STACK_OF (X509)* certs,unsigned int flags)479 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
480 X509 *signcert, EVP_PKEY *pkey,
481 STACK_OF(X509) *certs, unsigned int flags)
482 {
483 CMS_SignerInfo *rct_si;
484 CMS_ContentInfo *cms = NULL;
485 ASN1_OCTET_STRING **pos, *os;
486 BIO *rct_cont = NULL;
487 int r = 0;
488
489 flags &= ~(CMS_STREAM | CMS_TEXT);
490 /* Not really detached but avoids content being allocated */
491 flags |= CMS_PARTIAL | CMS_BINARY | CMS_DETACHED;
492 if (!pkey || !signcert) {
493 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
494 return NULL;
495 }
496
497 /* Initialize signed data */
498
499 cms = CMS_sign(NULL, NULL, certs, NULL, flags);
500 if (!cms)
501 goto err;
502
503 /* Set inner content type to signed receipt */
504 if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
505 goto err;
506
507 rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
508 if (!rct_si) {
509 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
510 goto err;
511 }
512
513 os = cms_encode_Receipt(si);
514
515 if (!os)
516 goto err;
517
518 /* Set content to digest */
519 rct_cont = BIO_new_mem_buf(os->data, os->length);
520 if (!rct_cont)
521 goto err;
522
523 /* Add msgSigDigest attribute */
524
525 if (!cms_msgSigDigest_add1(rct_si, si))
526 goto err;
527
528 /* Finalize structure */
529 if (!CMS_final(cms, rct_cont, NULL, flags))
530 goto err;
531
532 /* Set embedded content */
533 pos = CMS_get0_content(cms);
534 *pos = os;
535
536 r = 1;
537
538 err:
539 BIO_free(rct_cont);
540 if (r)
541 return cms;
542 CMS_ContentInfo_free(cms);
543 return NULL;
544
545 }
546
CMS_encrypt(STACK_OF (X509)* certs,BIO * data,const EVP_CIPHER * cipher,unsigned int flags)547 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
548 const EVP_CIPHER *cipher, unsigned int flags)
549 {
550 CMS_ContentInfo *cms;
551 int i;
552 X509 *recip;
553 cms = CMS_EnvelopedData_create(cipher);
554 if (!cms)
555 goto merr;
556 for (i = 0; i < sk_X509_num(certs); i++) {
557 recip = sk_X509_value(certs, i);
558 if (!CMS_add1_recipient_cert(cms, recip, flags)) {
559 CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
560 goto err;
561 }
562 }
563
564 if (!(flags & CMS_DETACHED))
565 CMS_set_detached(cms, 0);
566
567 if ((flags & (CMS_STREAM | CMS_PARTIAL))
568 || CMS_final(cms, data, NULL, flags))
569 return cms;
570 else
571 goto err;
572
573 merr:
574 CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
575 err:
576 CMS_ContentInfo_free(cms);
577 return NULL;
578 }
579
cms_kari_set1_pkey(CMS_ContentInfo * cms,CMS_RecipientInfo * ri,EVP_PKEY * pk,X509 * cert)580 static int cms_kari_set1_pkey(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
581 EVP_PKEY *pk, X509 *cert)
582 {
583 int i;
584 STACK_OF(CMS_RecipientEncryptedKey) *reks;
585 CMS_RecipientEncryptedKey *rek;
586 reks = CMS_RecipientInfo_kari_get0_reks(ri);
587 for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++) {
588 int rv;
589 rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
590 if (cert != NULL && CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
591 continue;
592 CMS_RecipientInfo_kari_set0_pkey(ri, pk);
593 rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
594 CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
595 if (rv > 0)
596 return 1;
597 return cert == NULL ? 0 : -1;
598 }
599 return 0;
600 }
601
CMS_decrypt_set1_pkey(CMS_ContentInfo * cms,EVP_PKEY * pk,X509 * cert)602 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
603 {
604 STACK_OF(CMS_RecipientInfo) *ris;
605 CMS_RecipientInfo *ri;
606 int i, r, ri_type;
607 int debug = 0, match_ri = 0;
608 ris = CMS_get0_RecipientInfos(cms);
609 if (ris)
610 debug = cms->d.envelopedData->encryptedContentInfo->debug;
611 ri_type = cms_pkey_get_ri_type(pk);
612 if (ri_type == CMS_RECIPINFO_NONE) {
613 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
614 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
615 return 0;
616 }
617
618 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
619 ri = sk_CMS_RecipientInfo_value(ris, i);
620 if (CMS_RecipientInfo_type(ri) != ri_type)
621 continue;
622 match_ri = 1;
623 if (ri_type == CMS_RECIPINFO_AGREE) {
624 r = cms_kari_set1_pkey(cms, ri, pk, cert);
625 if (r > 0)
626 return 1;
627 if (r < 0)
628 return 0;
629 }
630 /*
631 * If we have a cert try matching RecipientInfo otherwise try them
632 * all.
633 */
634 else if (!cert || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert)) {
635 EVP_PKEY_up_ref(pk);
636 CMS_RecipientInfo_set0_pkey(ri, pk);
637 r = CMS_RecipientInfo_decrypt(cms, ri);
638 CMS_RecipientInfo_set0_pkey(ri, NULL);
639 if (cert) {
640 /*
641 * If not debugging clear any error and return success to
642 * avoid leaking of information useful to MMA
643 */
644 if (!debug) {
645 ERR_clear_error();
646 return 1;
647 }
648 if (r > 0)
649 return 1;
650 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_DECRYPT_ERROR);
651 return 0;
652 }
653 /*
654 * If no cert and not debugging don't leave loop after first
655 * successful decrypt. Always attempt to decrypt all recipients
656 * to avoid leaking timing of a successful decrypt.
657 */
658 else if (r > 0 && debug)
659 return 1;
660 }
661 }
662 /* If no cert, key transport and not debugging always return success */
663 if (cert == NULL && ri_type == CMS_RECIPINFO_TRANS && match_ri && !debug) {
664 ERR_clear_error();
665 return 1;
666 }
667
668 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
669 return 0;
670
671 }
672
CMS_decrypt_set1_key(CMS_ContentInfo * cms,unsigned char * key,size_t keylen,const unsigned char * id,size_t idlen)673 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
674 unsigned char *key, size_t keylen,
675 const unsigned char *id, size_t idlen)
676 {
677 STACK_OF(CMS_RecipientInfo) *ris;
678 CMS_RecipientInfo *ri;
679 int i, r;
680 ris = CMS_get0_RecipientInfos(cms);
681 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
682 ri = sk_CMS_RecipientInfo_value(ris, i);
683 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
684 continue;
685
686 /*
687 * If we have an id try matching RecipientInfo otherwise try them
688 * all.
689 */
690 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) {
691 CMS_RecipientInfo_set0_key(ri, key, keylen);
692 r = CMS_RecipientInfo_decrypt(cms, ri);
693 CMS_RecipientInfo_set0_key(ri, NULL, 0);
694 if (r > 0)
695 return 1;
696 if (id) {
697 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_DECRYPT_ERROR);
698 return 0;
699 }
700 ERR_clear_error();
701 }
702 }
703
704 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
705 return 0;
706
707 }
708
CMS_decrypt_set1_password(CMS_ContentInfo * cms,unsigned char * pass,ossl_ssize_t passlen)709 int CMS_decrypt_set1_password(CMS_ContentInfo *cms,
710 unsigned char *pass, ossl_ssize_t passlen)
711 {
712 STACK_OF(CMS_RecipientInfo) *ris;
713 CMS_RecipientInfo *ri;
714 int i, r;
715 ris = CMS_get0_RecipientInfos(cms);
716 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
717 ri = sk_CMS_RecipientInfo_value(ris, i);
718 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
719 continue;
720 CMS_RecipientInfo_set0_password(ri, pass, passlen);
721 r = CMS_RecipientInfo_decrypt(cms, ri);
722 CMS_RecipientInfo_set0_password(ri, NULL, 0);
723 if (r > 0)
724 return 1;
725 }
726
727 CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
728 return 0;
729
730 }
731
CMS_decrypt(CMS_ContentInfo * cms,EVP_PKEY * pk,X509 * cert,BIO * dcont,BIO * out,unsigned int flags)732 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
733 BIO *dcont, BIO *out, unsigned int flags)
734 {
735 int r;
736 BIO *cont;
737 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) {
738 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
739 return 0;
740 }
741 if (!dcont && !check_content(cms))
742 return 0;
743 if (flags & CMS_DEBUG_DECRYPT)
744 cms->d.envelopedData->encryptedContentInfo->debug = 1;
745 else
746 cms->d.envelopedData->encryptedContentInfo->debug = 0;
747 if (!cert)
748 cms->d.envelopedData->encryptedContentInfo->havenocert = 1;
749 else
750 cms->d.envelopedData->encryptedContentInfo->havenocert = 0;
751 if (!pk && !cert && !dcont && !out)
752 return 1;
753 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
754 return 0;
755 cont = CMS_dataInit(cms, dcont);
756 if (!cont)
757 return 0;
758 r = cms_copy_content(out, cont, flags);
759 do_free_upto(cont, dcont);
760 return r;
761 }
762
CMS_final(CMS_ContentInfo * cms,BIO * data,BIO * dcont,unsigned int flags)763 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
764 {
765 BIO *cmsbio;
766 int ret = 0;
767
768 if ((cmsbio = CMS_dataInit(cms, dcont)) == NULL) {
769 CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_LIB);
770 return 0;
771 }
772
773 SMIME_crlf_copy(data, cmsbio, flags);
774
775 (void)BIO_flush(cmsbio);
776
777 if (!CMS_dataFinal(cms, cmsbio)) {
778 CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_DATAFINAL_ERROR);
779 goto err;
780 }
781
782 ret = 1;
783
784 err:
785 do_free_upto(cmsbio, dcont);
786
787 return ret;
788
789 }
790
791 #ifdef ZLIB
792
CMS_uncompress(CMS_ContentInfo * cms,BIO * dcont,BIO * out,unsigned int flags)793 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
794 unsigned int flags)
795 {
796 BIO *cont;
797 int r;
798 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData) {
799 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_TYPE_NOT_COMPRESSED_DATA);
800 return 0;
801 }
802
803 if (!dcont && !check_content(cms))
804 return 0;
805
806 cont = CMS_dataInit(cms, dcont);
807 if (!cont)
808 return 0;
809 r = cms_copy_content(out, cont, flags);
810 do_free_upto(cont, dcont);
811 return r;
812 }
813
CMS_compress(BIO * in,int comp_nid,unsigned int flags)814 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
815 {
816 CMS_ContentInfo *cms;
817 if (comp_nid <= 0)
818 comp_nid = NID_zlib_compression;
819 cms = cms_CompressedData_create(comp_nid);
820 if (!cms)
821 return NULL;
822
823 if (!(flags & CMS_DETACHED))
824 CMS_set_detached(cms, 0);
825
826 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
827 return cms;
828
829 CMS_ContentInfo_free(cms);
830 return NULL;
831 }
832
833 #else
834
CMS_uncompress(CMS_ContentInfo * cms,BIO * dcont,BIO * out,unsigned int flags)835 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
836 unsigned int flags)
837 {
838 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
839 return 0;
840 }
841
CMS_compress(BIO * in,int comp_nid,unsigned int flags)842 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
843 {
844 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
845 return NULL;
846 }
847
848 #endif
849