1 /* crypto/cms/cms_smime.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
55 #include <openssl/asn1t.h>
56 #include <openssl/x509.h>
57 #include <openssl/x509v3.h>
58 #include <openssl/err.h>
59 #include <openssl/cms.h>
62 static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
64 unsigned char buf[4096];
69 tmpout = BIO_new(BIO_s_null());
70 else if (flags & CMS_TEXT)
72 tmpout = BIO_new(BIO_s_mem());
73 BIO_set_mem_eof_return(tmpout, 0);
80 CMSerr(CMS_F_CMS_COPY_CONTENT,ERR_R_MALLOC_FAILURE);
84 /* Read all content through chain to process digest, decrypt etc */
87 i=BIO_read(in,buf,sizeof(buf));
90 if (BIO_method_type(in) == BIO_TYPE_CIPHER)
92 if (!BIO_get_cipher_status(in))
100 if (tmpout && (BIO_write(tmpout, buf, i) != i))
106 if(!SMIME_text(tmpout, out))
108 CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR);
116 if (tmpout && (tmpout != out))
122 static int check_content(CMS_ContentInfo *cms)
124 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
127 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
133 static void do_free_upto(BIO *f, BIO *upto)
150 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
154 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
156 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
159 cont = CMS_dataInit(cms, NULL);
162 r = cms_copy_content(out, cont, flags);
167 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
169 CMS_ContentInfo *cms;
170 cms = cms_Data_create();
174 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
177 CMS_ContentInfo_free(cms);
182 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
187 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
189 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
193 if (!dcont && !check_content(cms))
196 cont = CMS_dataInit(cms, dcont);
199 r = cms_copy_content(out, cont, flags);
201 r = cms_DigestedData_do_final(cms, cont, 1);
202 do_free_upto(cont, dcont);
206 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
209 CMS_ContentInfo *cms;
212 cms = cms_DigestedData_create(md);
216 if(!(flags & CMS_DETACHED))
217 CMS_set_detached(cms, 0);
219 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
222 CMS_ContentInfo_free(cms);
226 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
227 const unsigned char *key, size_t keylen,
228 BIO *dcont, BIO *out, unsigned int flags)
232 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
234 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
235 CMS_R_TYPE_NOT_ENCRYPTED_DATA);
239 if (!dcont && !check_content(cms))
242 if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
244 cont = CMS_dataInit(cms, dcont);
247 r = cms_copy_content(out, cont, flags);
248 do_free_upto(cont, dcont);
252 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
253 const unsigned char *key, size_t keylen,
256 CMS_ContentInfo *cms;
259 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
262 cms = CMS_ContentInfo_new();
265 if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
268 if(!(flags & CMS_DETACHED))
269 CMS_set_detached(cms, 0);
271 if ((flags & (CMS_STREAM|CMS_PARTIAL))
272 || CMS_final(cms, in, NULL, flags))
275 CMS_ContentInfo_free(cms);
279 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
281 STACK_OF(X509) *certs,
282 STACK_OF(X509_CRL) *crls,
288 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
289 if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
291 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
292 CMS_R_STORE_INIT_ERROR);
295 X509_STORE_CTX_set_default(&ctx, "smime_sign");
297 X509_STORE_CTX_set0_crls(&ctx, crls);
299 i = X509_verify_cert(&ctx);
302 j = X509_STORE_CTX_get_error(&ctx);
303 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
304 CMS_R_CERTIFICATE_VERIFY_ERROR);
305 ERR_add_error_data(2, "Verify error:",
306 X509_verify_cert_error_string(j));
311 X509_STORE_CTX_cleanup(&ctx);
316 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
317 X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
320 STACK_OF(CMS_SignerInfo) *sinfos;
321 STACK_OF(X509) *cms_certs = NULL;
322 STACK_OF(X509_CRL) *crls = NULL;
324 int i, scount = 0, ret = 0;
325 BIO *cmsbio = NULL, *tmpin = NULL;
327 if (!dcont && !check_content(cms))
330 /* Attempt to find all signer certificates */
332 sinfos = CMS_get0_SignerInfos(cms);
334 if (sk_CMS_SignerInfo_num(sinfos) <= 0)
336 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
340 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
342 si = sk_CMS_SignerInfo_value(sinfos, i);
343 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
348 if (scount != sk_CMS_SignerInfo_num(sinfos))
349 scount += CMS_set1_signers_certs(cms, certs, flags);
351 if (scount != sk_CMS_SignerInfo_num(sinfos))
353 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
357 /* Attempt to verify all signers certs */
359 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
361 cms_certs = CMS_get1_certs(cms);
362 if (!(flags & CMS_NOCRL))
363 crls = CMS_get1_crls(cms);
364 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
366 si = sk_CMS_SignerInfo_value(sinfos, i);
367 if (!cms_signerinfo_verify_cert(si, store,
368 cms_certs, crls, flags))
373 /* Attempt to verify all SignerInfo signed attribute signatures */
375 if (!(flags & CMS_NO_ATTR_VERIFY))
377 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
379 si = sk_CMS_SignerInfo_value(sinfos, i);
380 if (CMS_signed_get_attr_count(si) < 0)
382 if (CMS_SignerInfo_verify(si) <= 0)
387 /* Performance optimization: if the content is a memory BIO then
388 * store its contents in a temporary read only memory BIO. This
389 * avoids potentially large numbers of slow copies of data which will
390 * occur when reading from a read write memory BIO when signatures
394 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
398 len = BIO_get_mem_data(dcont, &ptr);
399 tmpin = BIO_new_mem_buf(ptr, len);
402 CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
410 cmsbio=CMS_dataInit(cms, tmpin);
414 if (!cms_copy_content(out, cmsbio, flags))
417 if (!(flags & CMS_NO_CONTENT_VERIFY))
419 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
421 si = sk_CMS_SignerInfo_value(sinfos, i);
422 if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0)
424 CMSerr(CMS_F_CMS_VERIFY,
425 CMS_R_CONTENT_VERIFY_ERROR);
435 if (dcont && (tmpin == dcont))
436 do_free_upto(cmsbio, dcont);
438 BIO_free_all(cmsbio);
441 sk_X509_pop_free(cms_certs, X509_free);
443 sk_X509_CRL_pop_free(crls, X509_CRL_free);
448 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
449 STACK_OF(X509) *certs,
450 X509_STORE *store, unsigned int flags)
453 flags &= ~(CMS_DETACHED|CMS_TEXT);
454 r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
457 return cms_Receipt_verify(rcms, ocms);
460 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
461 BIO *data, unsigned int flags)
463 CMS_ContentInfo *cms;
466 cms = CMS_ContentInfo_new();
467 if (!cms || !CMS_SignedData_init(cms))
470 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
472 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
476 for (i = 0; i < sk_X509_num(certs); i++)
478 X509 *x = sk_X509_value(certs, i);
479 if (!CMS_add1_cert(cms, x))
483 if(!(flags & CMS_DETACHED))
484 CMS_set_detached(cms, 0);
486 if ((flags & (CMS_STREAM|CMS_PARTIAL))
487 || CMS_final(cms, data, NULL, flags))
493 CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
497 CMS_ContentInfo_free(cms);
501 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
502 X509 *signcert, EVP_PKEY *pkey,
503 STACK_OF(X509) *certs,
506 CMS_SignerInfo *rct_si;
507 CMS_ContentInfo *cms = NULL;
508 ASN1_OCTET_STRING **pos, *os;
509 BIO *rct_cont = NULL;
512 flags &= ~(CMS_STREAM|CMS_TEXT);
513 /* Not really detached but avoids content being allocated */
514 flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
515 if (!pkey || !signcert)
517 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
521 /* Initialize signed data */
523 cms = CMS_sign(NULL, NULL, certs, NULL, flags);
527 /* Set inner content type to signed receipt */
528 if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
531 rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
534 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
538 os = cms_encode_Receipt(si);
543 /* Set content to digest */
544 rct_cont = BIO_new_mem_buf(os->data, os->length);
548 /* Add msgSigDigest attribute */
550 if (!cms_msgSigDigest_add1(rct_si, si))
553 /* Finalize structure */
554 if (!CMS_final(cms, rct_cont, NULL, flags))
557 /* Set embedded content */
558 pos = CMS_get0_content(cms);
568 CMS_ContentInfo_free(cms);
573 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
574 const EVP_CIPHER *cipher, unsigned int flags)
576 CMS_ContentInfo *cms;
579 cms = CMS_EnvelopedData_create(cipher);
582 for (i = 0; i < sk_X509_num(certs); i++)
584 recip = sk_X509_value(certs, i);
585 if (!CMS_add1_recipient_cert(cms, recip, flags))
587 CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
592 if(!(flags & CMS_DETACHED))
593 CMS_set_detached(cms, 0);
595 if ((flags & (CMS_STREAM|CMS_PARTIAL))
596 || CMS_final(cms, data, NULL, flags))
602 CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
605 CMS_ContentInfo_free(cms);
609 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
611 STACK_OF(CMS_RecipientInfo) *ris;
612 CMS_RecipientInfo *ri;
615 ris = CMS_get0_RecipientInfos(cms);
617 debug = cms->d.envelopedData->encryptedContentInfo->debug;
618 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
620 ri = sk_CMS_RecipientInfo_value(ris, i);
621 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
623 /* If we have a cert try matching RecipientInfo
624 * otherwise try them all.
626 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
628 CMS_RecipientInfo_set0_pkey(ri, pk);
629 r = CMS_RecipientInfo_decrypt(cms, ri);
630 CMS_RecipientInfo_set0_pkey(ri, NULL);
633 /* If not debugging clear any error and
634 * return success to avoid leaking of
635 * information useful to MMA
644 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
645 CMS_R_DECRYPT_ERROR);
648 /* If no cert and not debugging don't leave loop
649 * after first successful decrypt. Always attempt
650 * to decrypt all recipients to avoid leaking timing
651 * of a successful decrypt.
653 else if (r > 0 && debug)
657 /* If no cert and not debugging always return success */
664 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
669 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
670 unsigned char *key, size_t keylen,
671 unsigned char *id, size_t idlen)
673 STACK_OF(CMS_RecipientInfo) *ris;
674 CMS_RecipientInfo *ri;
676 ris = CMS_get0_RecipientInfos(cms);
677 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
679 ri = sk_CMS_RecipientInfo_value(ris, i);
680 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
683 /* If we have an id try matching RecipientInfo
684 * otherwise try them all.
686 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
688 CMS_RecipientInfo_set0_key(ri, key, keylen);
689 r = CMS_RecipientInfo_decrypt(cms, ri);
690 CMS_RecipientInfo_set0_key(ri, NULL, 0);
695 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
696 CMS_R_DECRYPT_ERROR);
703 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
708 int CMS_decrypt_set1_password(CMS_ContentInfo *cms,
709 unsigned char *pass, ossl_ssize_t passlen)
711 STACK_OF(CMS_RecipientInfo) *ris;
712 CMS_RecipientInfo *ri;
714 ris = CMS_get0_RecipientInfos(cms);
715 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)
720 CMS_RecipientInfo_set0_password(ri, pass, passlen);
721 r = CMS_RecipientInfo_decrypt(cms, ri);
722 CMS_RecipientInfo_set0_password(ri, NULL, 0);
727 CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
732 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
733 BIO *dcont, BIO *out,
738 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
740 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
743 if (!dcont && !check_content(cms))
745 if (flags & CMS_DEBUG_DECRYPT)
746 cms->d.envelopedData->encryptedContentInfo->debug = 1;
748 cms->d.envelopedData->encryptedContentInfo->debug = 0;
749 if (!pk && !cert && !dcont && !out)
751 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
753 cont = CMS_dataInit(cms, dcont);
756 r = cms_copy_content(out, cont, flags);
757 do_free_upto(cont, dcont);
761 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
765 if (!(cmsbio = CMS_dataInit(cms, dcont)))
767 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
771 SMIME_crlf_copy(data, cmsbio, flags);
773 (void)BIO_flush(cmsbio);
776 if (!CMS_dataFinal(cms, cmsbio))
778 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
785 do_free_upto(cmsbio, dcont);
793 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
798 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
800 CMSerr(CMS_F_CMS_UNCOMPRESS,
801 CMS_R_TYPE_NOT_COMPRESSED_DATA);
805 if (!dcont && !check_content(cms))
808 cont = CMS_dataInit(cms, dcont);
811 r = cms_copy_content(out, cont, flags);
812 do_free_upto(cont, dcont);
816 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
818 CMS_ContentInfo *cms;
820 comp_nid = NID_zlib_compression;
821 cms = cms_CompressedData_create(comp_nid);
825 if(!(flags & CMS_DETACHED))
826 CMS_set_detached(cms, 0);
828 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
831 CMS_ContentInfo_free(cms);
837 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
840 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
844 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
846 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);