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 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
132 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
134 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
137 cont = CMS_dataInit(cms, NULL);
140 r = cms_copy_content(out, cont, flags);
145 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
147 CMS_ContentInfo *cms;
148 cms = cms_Data_create();
152 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
155 CMS_ContentInfo_free(cms);
160 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
165 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
167 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
171 if (!dcont && !check_content(cms))
174 cont = CMS_dataInit(cms, dcont);
177 r = cms_copy_content(out, cont, flags);
179 r = cms_DigestedData_do_final(cms, cont, 1);
184 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
187 CMS_ContentInfo *cms;
190 cms = cms_DigestedData_create(md);
194 if(!(flags & CMS_DETACHED))
195 CMS_set_detached(cms, 0);
197 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
200 CMS_ContentInfo_free(cms);
204 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
205 const unsigned char *key, size_t keylen,
206 BIO *dcont, BIO *out, unsigned int flags)
210 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
212 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
213 CMS_R_TYPE_NOT_ENCRYPTED_DATA);
217 if (!dcont && !check_content(cms))
220 if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
222 cont = CMS_dataInit(cms, dcont);
225 r = cms_copy_content(out, cont, flags);
230 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
231 const unsigned char *key, size_t keylen,
234 CMS_ContentInfo *cms;
237 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
240 cms = CMS_ContentInfo_new();
243 if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
246 if(!(flags & CMS_DETACHED))
247 CMS_set_detached(cms, 0);
249 if ((flags & (CMS_STREAM|CMS_PARTIAL))
250 || CMS_final(cms, in, NULL, flags))
253 CMS_ContentInfo_free(cms);
257 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
259 STACK_OF(X509) *certs,
260 STACK_OF(X509_CRL) *crls,
266 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
267 if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
269 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
270 CMS_R_STORE_INIT_ERROR);
273 X509_STORE_CTX_set_purpose(&ctx, X509_PURPOSE_SMIME_SIGN);
275 X509_STORE_CTX_set0_crls(&ctx, crls);
277 i = X509_verify_cert(&ctx);
280 j = X509_STORE_CTX_get_error(&ctx);
281 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
282 CMS_R_CERTIFICATE_VERIFY_ERROR);
283 ERR_add_error_data(2, "Verify error:",
284 X509_verify_cert_error_string(j));
289 X509_STORE_CTX_cleanup(&ctx);
294 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
295 X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
298 STACK_OF(CMS_SignerInfo) *sinfos;
299 STACK_OF(X509) *cms_certs = NULL;
300 STACK_OF(X509_CRL) *crls = NULL;
302 int i, scount = 0, ret = 0;
303 BIO *cmsbio = NULL, *tmpin = NULL;
305 if (!dcont && !check_content(cms))
308 /* Attempt to find all signer certificates */
310 sinfos = CMS_get0_SignerInfos(cms);
312 if (sk_CMS_SignerInfo_num(sinfos) <= 0)
314 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
318 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
320 si = sk_CMS_SignerInfo_value(sinfos, i);
321 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
326 if (scount != sk_CMS_SignerInfo_num(sinfos))
327 scount += CMS_set1_signers_certs(cms, certs, flags);
329 if (scount != sk_CMS_SignerInfo_num(sinfos))
331 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
335 /* Attempt to verify all signers certs */
337 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
339 cms_certs = CMS_get1_certs(cms);
340 if (!(flags & CMS_NOCRL))
341 crls = CMS_get1_crls(cms);
342 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
344 si = sk_CMS_SignerInfo_value(sinfos, i);
345 if (!cms_signerinfo_verify_cert(si, store,
346 cms_certs, crls, flags))
351 /* Attempt to verify all SignerInfo signed attribute signatures */
353 if (!(flags & CMS_NO_ATTR_VERIFY))
355 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
357 si = sk_CMS_SignerInfo_value(sinfos, i);
358 if (CMS_signed_get_attr_count(si) < 0)
360 if (CMS_SignerInfo_verify(si) <= 0)
365 /* Performance optimization: if the content is a memory BIO then
366 * store its contents in a temporary read only memory BIO. This
367 * avoids potentially large numbers of slow copies of data which will
368 * occur when reading from a read write memory BIO when signatures
372 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
376 len = BIO_get_mem_data(dcont, &ptr);
377 tmpin = BIO_new_mem_buf(ptr, len);
380 CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
388 cmsbio=CMS_dataInit(cms, tmpin);
392 if (!cms_copy_content(out, cmsbio, flags))
395 if (!(flags & CMS_NO_CONTENT_VERIFY))
397 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
399 si = sk_CMS_SignerInfo_value(sinfos, i);
400 if (!CMS_SignerInfo_verify_content(si, cmsbio))
402 CMSerr(CMS_F_CMS_VERIFY,
403 CMS_R_CONTENT_VERIFY_ERROR);
413 if (dcont && (tmpin == dcont))
415 BIO_free_all(cmsbio);
418 sk_X509_pop_free(cms_certs, X509_free);
420 sk_X509_CRL_pop_free(crls, X509_CRL_free);
425 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
426 STACK_OF(X509) *certs,
427 X509_STORE *store, unsigned int flags)
430 flags &= ~(CMS_DETACHED|CMS_TEXT);
431 r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
434 return cms_Receipt_verify(rcms, ocms);
437 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
438 BIO *data, unsigned int flags)
440 CMS_ContentInfo *cms;
442 cms = CMS_ContentInfo_new();
445 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
447 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
450 for (i = 0; i < sk_X509_num(certs); i++)
452 X509 *x = sk_X509_value(certs, i);
453 if (!CMS_add1_cert(cms, x))
456 /* If no signer or certs initialize signedData */
457 if (!pkey && !i && !CMS_SignedData_init(cms))
460 if(!(flags & CMS_DETACHED))
461 CMS_set_detached(cms, 0);
463 if ((flags & (CMS_STREAM|CMS_PARTIAL))
464 || CMS_final(cms, data, NULL, flags))
470 CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
474 CMS_ContentInfo_free(cms);
478 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
479 X509 *signcert, EVP_PKEY *pkey,
480 STACK_OF(X509) *certs,
483 CMS_SignerInfo *rct_si;
484 CMS_ContentInfo *cms = NULL;
485 ASN1_OCTET_STRING **pos, *os;
486 BIO *rct_cont = NULL;
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)
494 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
498 /* Initialize signed data */
500 cms = CMS_sign(NULL, NULL, certs, NULL, flags);
504 /* Set inner content type to signed receipt */
505 if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
508 rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
511 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
515 os = cms_encode_Receipt(si);
520 /* Set content to digest */
521 rct_cont = BIO_new_mem_buf(os->data, os->length);
525 /* Add msgSigDigest attribute */
527 if (!cms_msgSigDigest_add1(rct_si, si))
530 /* Finalize structure */
531 if (!CMS_final(cms, rct_cont, NULL, flags))
534 /* Set embedded content */
535 pos = CMS_get0_content(cms);
545 CMS_ContentInfo_free(cms);
550 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
551 const EVP_CIPHER *cipher, unsigned int flags)
553 CMS_ContentInfo *cms;
556 cms = CMS_EnvelopedData_create(cipher);
559 for (i = 0; i < sk_X509_num(certs); i++)
561 recip = sk_X509_value(certs, i);
562 if (!CMS_add1_recipient_cert(cms, recip, flags))
564 CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
569 if(!(flags & CMS_DETACHED))
570 CMS_set_detached(cms, 0);
572 if ((flags & (CMS_STREAM|CMS_PARTIAL))
573 || CMS_final(cms, data, NULL, flags))
579 CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
582 CMS_ContentInfo_free(cms);
586 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
588 STACK_OF(CMS_RecipientInfo) *ris;
589 CMS_RecipientInfo *ri;
591 ris = CMS_get0_RecipientInfos(cms);
592 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
594 ri = sk_CMS_RecipientInfo_value(ris, i);
595 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
597 /* If we have a cert try matching RecipientInfo
598 * otherwise try them all.
600 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
602 CMS_RecipientInfo_set0_pkey(ri, pk);
603 r = CMS_RecipientInfo_decrypt(cms, ri);
604 CMS_RecipientInfo_set0_pkey(ri, NULL);
609 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
610 CMS_R_DECRYPT_ERROR);
617 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
622 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
623 unsigned char *key, size_t keylen,
624 unsigned char *id, size_t idlen)
626 STACK_OF(CMS_RecipientInfo) *ris;
627 CMS_RecipientInfo *ri;
629 ris = CMS_get0_RecipientInfos(cms);
630 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
632 ri = sk_CMS_RecipientInfo_value(ris, i);
633 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
636 /* If we have an id try matching RecipientInfo
637 * otherwise try them all.
639 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
641 CMS_RecipientInfo_set0_key(ri, key, keylen);
642 r = CMS_RecipientInfo_decrypt(cms, ri);
643 CMS_RecipientInfo_set0_key(ri, NULL, 0);
648 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
649 CMS_R_DECRYPT_ERROR);
656 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
661 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
662 BIO *dcont, BIO *out,
667 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
669 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
672 if (!dcont && !check_content(cms))
674 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
677 cont = CMS_dataInit(cms, dcont);
680 r = cms_copy_content(out, cont, flags);
685 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
689 if (!(cmsbio = CMS_dataInit(cms, dcont)))
691 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
695 SMIME_crlf_copy(data, cmsbio, flags);
697 (void)BIO_flush(cmsbio);
700 if (!CMS_dataFinal(cms, cmsbio))
702 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
709 BIO_free_all(cmsbio);
717 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
722 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
724 CMSerr(CMS_F_CMS_UNCOMPRESS,
725 CMS_R_TYPE_NOT_COMPRESSED_DATA);
729 if (!dcont && !check_content(cms))
732 cont = CMS_dataInit(cms, dcont);
735 r = cms_copy_content(out, cont, flags);
740 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
742 CMS_ContentInfo *cms;
744 comp_nid = NID_zlib_compression;
745 cms = cms_CompressedData_create(comp_nid);
749 if(!(flags & CMS_DETACHED))
750 CMS_set_detached(cms, 0);
752 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
755 CMS_ContentInfo_free(cms);
761 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
764 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
768 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
770 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);