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 (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))
218 flags &= ~CMS_STREAM;
219 CMS_set_detached(cms, 0);
222 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
225 CMS_ContentInfo_free(cms);
229 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
230 const unsigned char *key, size_t keylen,
231 BIO *dcont, BIO *out, unsigned int flags)
235 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
237 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
238 CMS_R_TYPE_NOT_ENCRYPTED_DATA);
242 if (!dcont && !check_content(cms))
245 if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
247 cont = CMS_dataInit(cms, dcont);
250 r = cms_copy_content(out, cont, flags);
251 do_free_upto(cont, dcont);
255 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
256 const unsigned char *key, size_t keylen,
259 CMS_ContentInfo *cms;
262 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
265 cms = CMS_ContentInfo_new();
268 if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
271 if(!(flags & CMS_DETACHED))
273 flags &= ~CMS_STREAM;
274 CMS_set_detached(cms, 0);
277 if ((flags & (CMS_STREAM|CMS_PARTIAL))
278 || CMS_final(cms, in, NULL, flags))
281 CMS_ContentInfo_free(cms);
285 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
287 STACK_OF(X509) *certs,
288 STACK_OF(X509_CRL) *crls,
294 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
295 if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
297 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
298 CMS_R_STORE_INIT_ERROR);
301 X509_STORE_CTX_set_default(&ctx, "smime_sign");
303 X509_STORE_CTX_set0_crls(&ctx, crls);
305 i = X509_verify_cert(&ctx);
308 j = X509_STORE_CTX_get_error(&ctx);
309 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
310 CMS_R_CERTIFICATE_VERIFY_ERROR);
311 ERR_add_error_data(2, "Verify error:",
312 X509_verify_cert_error_string(j));
317 X509_STORE_CTX_cleanup(&ctx);
322 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
323 X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
326 STACK_OF(CMS_SignerInfo) *sinfos;
327 STACK_OF(X509) *cms_certs = NULL;
328 STACK_OF(X509_CRL) *crls = NULL;
330 int i, scount = 0, ret = 0;
331 BIO *cmsbio = NULL, *tmpin = NULL;
333 if (!dcont && !check_content(cms))
336 /* Attempt to find all signer certificates */
338 sinfos = CMS_get0_SignerInfos(cms);
340 if (sk_CMS_SignerInfo_num(sinfos) <= 0)
342 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
346 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
348 si = sk_CMS_SignerInfo_value(sinfos, i);
349 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
354 if (scount != sk_CMS_SignerInfo_num(sinfos))
355 scount += CMS_set1_signers_certs(cms, certs, flags);
357 if (scount != sk_CMS_SignerInfo_num(sinfos))
359 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
363 /* Attempt to verify all signers certs */
365 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
367 cms_certs = CMS_get1_certs(cms);
368 if (!(flags & CMS_NOCRL))
369 crls = CMS_get1_crls(cms);
370 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
372 si = sk_CMS_SignerInfo_value(sinfos, i);
373 if (!cms_signerinfo_verify_cert(si, store,
374 cms_certs, crls, flags))
379 /* Attempt to verify all SignerInfo signed attribute signatures */
381 if (!(flags & CMS_NO_ATTR_VERIFY))
383 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
385 si = sk_CMS_SignerInfo_value(sinfos, i);
386 if (CMS_signed_get_attr_count(si) < 0)
388 if (CMS_SignerInfo_verify(si) <= 0)
393 /* Performance optimization: if the content is a memory BIO then
394 * store its contents in a temporary read only memory BIO. This
395 * avoids potentially large numbers of slow copies of data which will
396 * occur when reading from a read write memory BIO when signatures
400 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
404 len = BIO_get_mem_data(dcont, &ptr);
405 tmpin = BIO_new_mem_buf(ptr, len);
408 CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
416 cmsbio=CMS_dataInit(cms, tmpin);
420 if (!cms_copy_content(out, cmsbio, flags))
423 if (!(flags & CMS_NO_CONTENT_VERIFY))
425 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
427 si = sk_CMS_SignerInfo_value(sinfos, i);
428 if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0)
430 CMSerr(CMS_F_CMS_VERIFY,
431 CMS_R_CONTENT_VERIFY_ERROR);
441 if (dcont && (tmpin == dcont))
442 do_free_upto(cmsbio, dcont);
444 BIO_free_all(cmsbio);
447 sk_X509_pop_free(cms_certs, X509_free);
449 sk_X509_CRL_pop_free(crls, X509_CRL_free);
454 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
455 STACK_OF(X509) *certs,
456 X509_STORE *store, unsigned int flags)
459 r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
462 return cms_Receipt_verify(rcms, ocms);
465 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
466 BIO *data, unsigned int flags)
468 CMS_ContentInfo *cms;
471 cms = CMS_ContentInfo_new();
472 if (!cms || !CMS_SignedData_init(cms))
475 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
477 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
481 for (i = 0; i < sk_X509_num(certs); i++)
483 X509 *x = sk_X509_value(certs, i);
484 if (!CMS_add1_cert(cms, x))
488 if(!(flags & CMS_DETACHED))
490 flags &= ~CMS_STREAM;
491 CMS_set_detached(cms, 0);
494 if ((flags & (CMS_STREAM|CMS_PARTIAL))
495 || CMS_final(cms, data, NULL, flags))
501 CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
505 CMS_ContentInfo_free(cms);
509 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
510 X509 *signcert, EVP_PKEY *pkey,
511 STACK_OF(X509) *certs,
514 CMS_SignerInfo *rct_si;
515 CMS_ContentInfo *cms = NULL;
516 ASN1_OCTET_STRING **pos, *os;
517 BIO *rct_cont = NULL;
520 flags &= ~CMS_STREAM;
521 /* Not really detached but avoids content being allocated */
522 flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
523 if (!pkey || !signcert)
525 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
529 /* Initialize signed data */
531 cms = CMS_sign(NULL, NULL, certs, NULL, flags);
535 /* Set inner content type to signed receipt */
536 if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
539 rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
542 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
546 os = cms_encode_Receipt(si);
551 /* Set content to digest */
552 rct_cont = BIO_new_mem_buf(os->data, os->length);
556 /* Add msgSigDigest attribute */
558 if (!cms_msgSigDigest_add1(rct_si, si))
561 /* Finalize structure */
562 if (!CMS_final(cms, rct_cont, NULL, flags))
565 /* Set embedded content */
566 pos = CMS_get0_content(cms);
576 CMS_ContentInfo_free(cms);
581 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
582 const EVP_CIPHER *cipher, unsigned int flags)
584 CMS_ContentInfo *cms;
587 cms = CMS_EnvelopedData_create(cipher);
590 for (i = 0; i < sk_X509_num(certs); i++)
592 recip = sk_X509_value(certs, i);
593 if (!CMS_add1_recipient_cert(cms, recip, flags))
595 CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
600 if(!(flags & CMS_DETACHED))
602 flags &= ~CMS_STREAM;
603 CMS_set_detached(cms, 0);
606 if ((flags & (CMS_STREAM|CMS_PARTIAL))
607 || CMS_final(cms, data, NULL, flags))
613 CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
616 CMS_ContentInfo_free(cms);
620 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
622 STACK_OF(CMS_RecipientInfo) *ris;
623 CMS_RecipientInfo *ri;
626 ris = CMS_get0_RecipientInfos(cms);
628 debug = cms->d.envelopedData->encryptedContentInfo->debug;
629 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
631 ri = sk_CMS_RecipientInfo_value(ris, i);
632 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
634 /* If we have a cert try matching RecipientInfo
635 * otherwise try them all.
637 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
639 CMS_RecipientInfo_set0_pkey(ri, pk);
640 r = CMS_RecipientInfo_decrypt(cms, ri);
641 CMS_RecipientInfo_set0_pkey(ri, NULL);
644 /* If not debugging clear any error and
645 * return success to avoid leaking of
646 * information useful to MMA
655 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
656 CMS_R_DECRYPT_ERROR);
659 /* If no cert and not debugging don't leave loop
660 * after first successful decrypt. Always attempt
661 * to decrypt all recipients to avoid leaking timing
662 * of a successful decrypt.
664 else if (r > 0 && debug)
668 /* If no cert and not debugging always return success */
675 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
680 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
681 unsigned char *key, size_t keylen,
682 unsigned char *id, size_t idlen)
684 STACK_OF(CMS_RecipientInfo) *ris;
685 CMS_RecipientInfo *ri;
687 ris = CMS_get0_RecipientInfos(cms);
688 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
690 ri = sk_CMS_RecipientInfo_value(ris, i);
691 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
694 /* If we have an id try matching RecipientInfo
695 * otherwise try them all.
697 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
699 CMS_RecipientInfo_set0_key(ri, key, keylen);
700 r = CMS_RecipientInfo_decrypt(cms, ri);
701 CMS_RecipientInfo_set0_key(ri, NULL, 0);
706 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
707 CMS_R_DECRYPT_ERROR);
714 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
719 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
720 BIO *dcont, BIO *out,
725 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
727 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
730 if (!dcont && !check_content(cms))
732 if (flags & CMS_DEBUG_DECRYPT)
733 cms->d.envelopedData->encryptedContentInfo->debug = 1;
735 cms->d.envelopedData->encryptedContentInfo->debug = 0;
736 if (!pk && !cert && !dcont && !out)
738 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
740 cont = CMS_dataInit(cms, dcont);
743 r = cms_copy_content(out, cont, flags);
744 do_free_upto(cont, dcont);
748 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
752 if (!(cmsbio = CMS_dataInit(cms, dcont)))
754 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
758 SMIME_crlf_copy(data, cmsbio, flags);
760 (void)BIO_flush(cmsbio);
763 if (!CMS_dataFinal(cms, cmsbio))
765 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
772 do_free_upto(cmsbio, dcont);
780 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
785 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
787 CMSerr(CMS_F_CMS_UNCOMPRESS,
788 CMS_R_TYPE_NOT_COMPRESSED_DATA);
792 if (!dcont && !check_content(cms))
795 cont = CMS_dataInit(cms, dcont);
798 r = cms_copy_content(out, cont, flags);
799 do_free_upto(cont, dcont);
803 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
805 CMS_ContentInfo *cms;
807 comp_nid = NID_zlib_compression;
808 cms = cms_CompressedData_create(comp_nid);
812 if(!(flags & CMS_DETACHED))
814 flags &= ~CMS_STREAM;
815 CMS_set_detached(cms, 0);
818 if (CMS_final(cms, in, NULL, flags))
821 CMS_ContentInfo_free(cms);
827 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
830 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
834 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
836 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);