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)
71 tmpout = BIO_new(BIO_s_mem());
77 CMSerr(CMS_F_CMS_COPY_CONTENT,ERR_R_MALLOC_FAILURE);
81 /* Read all content through chain to process digest, decrypt etc */
84 i=BIO_read(in,buf,sizeof(buf));
87 if (BIO_method_type(in) == BIO_TYPE_CIPHER)
89 if (!BIO_get_cipher_status(in))
96 BIO_write(tmpout, buf, i);
101 if(!SMIME_text(tmpout, out))
103 CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR);
111 if (tmpout && (tmpout != out))
117 static int check_content(CMS_ContentInfo *cms)
119 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
122 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
128 static void do_free_upto(BIO *f, BIO *upto)
145 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
149 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
151 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
154 cont = CMS_dataInit(cms, NULL);
157 r = cms_copy_content(out, cont, flags);
162 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
164 CMS_ContentInfo *cms;
165 cms = cms_Data_create();
169 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
172 CMS_ContentInfo_free(cms);
177 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
182 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
184 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
188 if (!dcont && !check_content(cms))
191 cont = CMS_dataInit(cms, dcont);
194 r = cms_copy_content(out, cont, flags);
196 r = cms_DigestedData_do_final(cms, cont, 1);
197 do_free_upto(cont, dcont);
201 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
204 CMS_ContentInfo *cms;
207 cms = cms_DigestedData_create(md);
211 if(!(flags & CMS_DETACHED))
212 CMS_set_detached(cms, 0);
214 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
217 CMS_ContentInfo_free(cms);
221 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
222 const unsigned char *key, size_t keylen,
223 BIO *dcont, BIO *out, unsigned int flags)
227 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
229 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
230 CMS_R_TYPE_NOT_ENCRYPTED_DATA);
234 if (!dcont && !check_content(cms))
237 if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
239 cont = CMS_dataInit(cms, dcont);
242 r = cms_copy_content(out, cont, flags);
243 do_free_upto(cont, dcont);
247 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
248 const unsigned char *key, size_t keylen,
251 CMS_ContentInfo *cms;
254 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
257 cms = CMS_ContentInfo_new();
260 if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
263 if(!(flags & CMS_DETACHED))
264 CMS_set_detached(cms, 0);
266 if ((flags & (CMS_STREAM|CMS_PARTIAL))
267 || CMS_final(cms, in, NULL, flags))
270 CMS_ContentInfo_free(cms);
274 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
276 STACK_OF(X509) *certs,
277 STACK_OF(X509_CRL) *crls,
283 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
284 if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
286 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
287 CMS_R_STORE_INIT_ERROR);
290 X509_STORE_CTX_set_purpose(&ctx, X509_PURPOSE_SMIME_SIGN);
292 X509_STORE_CTX_set0_crls(&ctx, crls);
294 i = X509_verify_cert(&ctx);
297 j = X509_STORE_CTX_get_error(&ctx);
298 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
299 CMS_R_CERTIFICATE_VERIFY_ERROR);
300 ERR_add_error_data(2, "Verify error:",
301 X509_verify_cert_error_string(j));
306 X509_STORE_CTX_cleanup(&ctx);
311 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
312 X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
315 STACK_OF(CMS_SignerInfo) *sinfos;
316 STACK_OF(X509) *cms_certs = NULL;
317 STACK_OF(X509_CRL) *crls = NULL;
319 int i, scount = 0, ret = 0;
320 BIO *cmsbio = NULL, *tmpin = NULL;
322 if (!dcont && !check_content(cms))
325 /* Attempt to find all signer certificates */
327 sinfos = CMS_get0_SignerInfos(cms);
329 if (sk_CMS_SignerInfo_num(sinfos) <= 0)
331 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
335 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
337 si = sk_CMS_SignerInfo_value(sinfos, i);
338 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
343 if (scount != sk_CMS_SignerInfo_num(sinfos))
344 scount += CMS_set1_signers_certs(cms, certs, flags);
346 if (scount != sk_CMS_SignerInfo_num(sinfos))
348 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
352 /* Attempt to verify all signers certs */
354 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
356 cms_certs = CMS_get1_certs(cms);
357 if (!(flags & CMS_NOCRL))
358 crls = CMS_get1_crls(cms);
359 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
361 si = sk_CMS_SignerInfo_value(sinfos, i);
362 if (!cms_signerinfo_verify_cert(si, store,
363 cms_certs, crls, flags))
368 /* Attempt to verify all SignerInfo signed attribute signatures */
370 if (!(flags & CMS_NO_ATTR_VERIFY))
372 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
374 si = sk_CMS_SignerInfo_value(sinfos, i);
375 if (CMS_signed_get_attr_count(si) < 0)
377 if (CMS_SignerInfo_verify(si) <= 0)
382 /* Performance optimization: if the content is a memory BIO then
383 * store its contents in a temporary read only memory BIO. This
384 * avoids potentially large numbers of slow copies of data which will
385 * occur when reading from a read write memory BIO when signatures
389 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
393 len = BIO_get_mem_data(dcont, &ptr);
394 tmpin = BIO_new_mem_buf(ptr, len);
397 CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
405 cmsbio=CMS_dataInit(cms, tmpin);
409 if (!cms_copy_content(out, cmsbio, flags))
412 if (!(flags & CMS_NO_CONTENT_VERIFY))
414 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
416 si = sk_CMS_SignerInfo_value(sinfos, i);
417 if (!CMS_SignerInfo_verify_content(si, cmsbio))
419 CMSerr(CMS_F_CMS_VERIFY,
420 CMS_R_CONTENT_VERIFY_ERROR);
430 if (dcont && (tmpin == dcont))
431 do_free_upto(cmsbio, dcont);
433 BIO_free_all(cmsbio);
436 sk_X509_pop_free(cms_certs, X509_free);
438 sk_X509_CRL_pop_free(crls, X509_CRL_free);
443 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
444 STACK_OF(X509) *certs,
445 X509_STORE *store, unsigned int flags)
448 flags &= ~(CMS_DETACHED|CMS_TEXT);
449 r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
452 return cms_Receipt_verify(rcms, ocms);
455 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
456 BIO *data, unsigned int flags)
458 CMS_ContentInfo *cms;
460 cms = CMS_ContentInfo_new();
463 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
465 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
468 for (i = 0; i < sk_X509_num(certs); i++)
470 X509 *x = sk_X509_value(certs, i);
471 if (!CMS_add1_cert(cms, x))
474 /* If no signer or certs initialize signedData */
475 if (!pkey && !i && !CMS_SignedData_init(cms))
478 if(!(flags & CMS_DETACHED))
479 CMS_set_detached(cms, 0);
481 if ((flags & (CMS_STREAM|CMS_PARTIAL))
482 || CMS_final(cms, data, NULL, flags))
488 CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
492 CMS_ContentInfo_free(cms);
496 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
497 X509 *signcert, EVP_PKEY *pkey,
498 STACK_OF(X509) *certs,
501 CMS_SignerInfo *rct_si;
502 CMS_ContentInfo *cms = NULL;
503 ASN1_OCTET_STRING **pos, *os;
504 BIO *rct_cont = NULL;
507 flags &= ~(CMS_STREAM|CMS_TEXT);
508 /* Not really detached but avoids content being allocated */
509 flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
510 if (!pkey || !signcert)
512 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
516 /* Initialize signed data */
518 cms = CMS_sign(NULL, NULL, certs, NULL, flags);
522 /* Set inner content type to signed receipt */
523 if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
526 rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
529 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
533 os = cms_encode_Receipt(si);
538 /* Set content to digest */
539 rct_cont = BIO_new_mem_buf(os->data, os->length);
543 /* Add msgSigDigest attribute */
545 if (!cms_msgSigDigest_add1(rct_si, si))
548 /* Finalize structure */
549 if (!CMS_final(cms, rct_cont, NULL, flags))
552 /* Set embedded content */
553 pos = CMS_get0_content(cms);
563 CMS_ContentInfo_free(cms);
568 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
569 const EVP_CIPHER *cipher, unsigned int flags)
571 CMS_ContentInfo *cms;
574 cms = CMS_EnvelopedData_create(cipher);
577 for (i = 0; i < sk_X509_num(certs); i++)
579 recip = sk_X509_value(certs, i);
580 if (!CMS_add1_recipient_cert(cms, recip, flags))
582 CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
587 if(!(flags & CMS_DETACHED))
588 CMS_set_detached(cms, 0);
590 if ((flags & (CMS_STREAM|CMS_PARTIAL))
591 || CMS_final(cms, data, NULL, flags))
597 CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
600 CMS_ContentInfo_free(cms);
604 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
606 STACK_OF(CMS_RecipientInfo) *ris;
607 CMS_RecipientInfo *ri;
609 ris = CMS_get0_RecipientInfos(cms);
610 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
612 ri = sk_CMS_RecipientInfo_value(ris, i);
613 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
615 /* If we have a cert try matching RecipientInfo
616 * otherwise try them all.
618 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
620 CMS_RecipientInfo_set0_pkey(ri, pk);
621 r = CMS_RecipientInfo_decrypt(cms, ri);
622 CMS_RecipientInfo_set0_pkey(ri, NULL);
627 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
628 CMS_R_DECRYPT_ERROR);
635 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
640 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
641 unsigned char *key, size_t keylen,
642 unsigned char *id, size_t idlen)
644 STACK_OF(CMS_RecipientInfo) *ris;
645 CMS_RecipientInfo *ri;
647 ris = CMS_get0_RecipientInfos(cms);
648 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
650 ri = sk_CMS_RecipientInfo_value(ris, i);
651 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
654 /* If we have an id try matching RecipientInfo
655 * otherwise try them all.
657 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
659 CMS_RecipientInfo_set0_key(ri, key, keylen);
660 r = CMS_RecipientInfo_decrypt(cms, ri);
661 CMS_RecipientInfo_set0_key(ri, NULL, 0);
666 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
667 CMS_R_DECRYPT_ERROR);
674 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
679 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
680 BIO *dcont, BIO *out,
685 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
687 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
690 if (!dcont && !check_content(cms))
692 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
695 cont = CMS_dataInit(cms, dcont);
698 r = cms_copy_content(out, cont, flags);
699 do_free_upto(cont, dcont);
703 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
707 if (!(cmsbio = CMS_dataInit(cms, dcont)))
709 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
713 SMIME_crlf_copy(data, cmsbio, flags);
715 (void)BIO_flush(cmsbio);
718 if (!CMS_dataFinal(cms, cmsbio))
720 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
727 do_free_upto(cmsbio, dcont);
735 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
740 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
742 CMSerr(CMS_F_CMS_UNCOMPRESS,
743 CMS_R_TYPE_NOT_COMPRESSED_DATA);
747 if (!dcont && !check_content(cms))
750 cont = CMS_dataInit(cms, dcont);
753 r = cms_copy_content(out, cont, flags);
754 do_free_upto(cont, dcont);
758 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
760 CMS_ContentInfo *cms;
762 comp_nid = NID_zlib_compression;
763 cms = cms_CompressedData_create(comp_nid);
767 if(!(flags & CMS_DETACHED))
768 CMS_set_detached(cms, 0);
770 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
773 CMS_ContentInfo_free(cms);
779 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
782 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
786 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
788 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);