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];
70 tmpout = BIO_new(BIO_s_mem());
73 CMSerr(CMS_F_CMS_COPY_CONTENT,ERR_R_MALLOC_FAILURE);
80 /* Read all content through chain to process digest, decrypt etc */
83 i=BIO_read(in,buf,sizeof(buf));
86 if (BIO_method_type(in) == BIO_TYPE_CIPHER)
88 if (!BIO_get_cipher_status(in))
95 BIO_write(tmpout, buf, i);
100 if(!SMIME_text(tmpout, out))
102 CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR);
110 if (tmpout && (tmpout != out))
116 static int check_content(CMS_ContentInfo *cms)
118 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
121 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
127 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
131 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
133 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
136 cont = CMS_dataInit(cms, NULL);
139 r = cms_copy_content(out, cont, flags);
144 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
146 CMS_ContentInfo *cms;
147 cms = cms_Data_create();
151 if ((flags & CMS_STREAM) || CMS_final(cms, in, flags))
154 CMS_ContentInfo_free(cms);
159 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
164 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
166 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
170 if (!dcont && !check_content(cms))
173 cont = CMS_dataInit(cms, dcont);
176 r = cms_copy_content(out, cont, flags);
178 r = cms_DigestedData_do_final(cms, cont, 1);
183 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
186 CMS_ContentInfo *cms;
189 cms = cms_DigestedData_create(md);
193 if(!(flags & CMS_DETACHED))
194 CMS_set_detached(cms, 0);
196 if ((flags & CMS_STREAM) || CMS_final(cms, in, flags))
199 CMS_ContentInfo_free(cms);
203 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
204 const unsigned char *key, size_t keylen,
205 BIO *dcont, BIO *out, unsigned int flags)
209 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
211 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
212 CMS_R_TYPE_NOT_ENCRYPTED_DATA);
216 if (!dcont && !check_content(cms))
219 if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
221 cont = CMS_dataInit(cms, dcont);
224 r = cms_copy_content(out, cont, flags);
229 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
230 const unsigned char *key, size_t keylen,
233 CMS_ContentInfo *cms;
236 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
239 cms = CMS_ContentInfo_new();
242 if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
245 if(!(flags & CMS_DETACHED))
246 CMS_set_detached(cms, 0);
248 if ((flags & (CMS_STREAM|CMS_PARTIAL)) || CMS_final(cms, in, flags))
251 CMS_ContentInfo_free(cms);
255 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
257 STACK_OF(X509) *certs,
258 STACK_OF(X509_CRL) *crls,
264 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
265 if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
267 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
268 CMS_R_STORE_INIT_ERROR);
271 X509_STORE_CTX_set_purpose(&ctx, X509_PURPOSE_SMIME_SIGN);
273 X509_STORE_CTX_set0_crls(&ctx, crls);
275 i = X509_verify_cert(&ctx);
278 j = X509_STORE_CTX_get_error(&ctx);
279 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
280 CMS_R_CERTIFICATE_VERIFY_ERROR);
281 ERR_add_error_data(2, "Verify error:",
282 X509_verify_cert_error_string(j));
287 X509_STORE_CTX_cleanup(&ctx);
292 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
293 X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
296 STACK_OF(CMS_SignerInfo) *sinfos;
297 STACK_OF(X509) *cms_certs = NULL;
298 STACK_OF(X509_CRL) *crls = NULL;
300 int i, scount = 0, ret = 0;
301 BIO *cmsbio = NULL, *tmpin = NULL;
303 if (!dcont && !check_content(cms))
306 /* Attempt to find all signer certificates */
308 sinfos = CMS_get0_SignerInfos(cms);
310 if (sk_CMS_SignerInfo_num(sinfos) <= 0)
312 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
316 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
318 si = sk_CMS_SignerInfo_value(sinfos, i);
319 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
324 if (scount != sk_CMS_SignerInfo_num(sinfos))
325 scount += CMS_set1_signers_certs(cms, certs, flags);
327 if (scount != sk_CMS_SignerInfo_num(sinfos))
329 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
333 /* Attempt to verify all signers certs */
335 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
337 cms_certs = CMS_get1_certs(cms);
338 crls = CMS_get1_crls(cms);
339 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
341 si = sk_CMS_SignerInfo_value(sinfos, i);
342 if (!cms_signerinfo_verify_cert(si, store,
343 cms_certs, crls, flags))
348 /* Attempt to verify all SignerInfo signed attribute signatures */
350 if (!(flags & CMS_NO_ATTR_VERIFY))
352 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
354 si = sk_CMS_SignerInfo_value(sinfos, i);
355 if (CMS_signed_get_attr_count(si) < 0)
357 if (CMS_SignerInfo_verify(si) <= 0)
362 /* Performance optimization: if the content is a memory BIO then
363 * store its contents in a temporary read only memory BIO. This
364 * avoids potentially large numbers of slow copies of data which will
365 * occur when reading from a read write memory BIO when signatures
369 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
373 len = BIO_get_mem_data(dcont, &ptr);
374 tmpin = BIO_new_mem_buf(ptr, len);
377 CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
385 cmsbio=CMS_dataInit(cms, tmpin);
389 if (!cms_copy_content(out, cmsbio, flags))
392 if (!(flags & CMS_NO_CONTENT_VERIFY))
394 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
396 si = sk_CMS_SignerInfo_value(sinfos, i);
397 if (!CMS_SignerInfo_verify_content(si, cmsbio))
399 CMSerr(CMS_F_CMS_VERIFY,
400 CMS_R_CONTENT_VERIFY_ERROR);
410 if (dcont && (tmpin == dcont))
412 BIO_free_all(cmsbio);
415 sk_X509_pop_free(cms_certs, X509_free);
417 sk_X509_CRL_pop_free(crls, X509_CRL_free);
422 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
423 BIO *data, unsigned int flags)
425 CMS_ContentInfo *cms;
427 cms = CMS_ContentInfo_new();
430 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
432 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
435 for (i = 0; i < sk_X509_num(certs); i++)
437 X509 *x = sk_X509_value(certs, i);
438 if (!CMS_add1_cert(cms, x))
441 /* If no signer or certs initialize signedData */
442 if (!pkey && !i && !CMS_SignedData_init(cms))
445 if(!(flags & CMS_DETACHED))
446 CMS_set_detached(cms, 0);
448 if ((flags & (CMS_STREAM|CMS_PARTIAL)) || CMS_final(cms, data, flags))
454 CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
458 CMS_ContentInfo_free(cms);
462 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
463 const EVP_CIPHER *cipher, unsigned int flags)
465 CMS_ContentInfo *cms;
468 cms = CMS_EnvelopedData_create(cipher);
471 for (i = 0; i < sk_X509_num(certs); i++)
473 recip = sk_X509_value(certs, i);
474 if (!CMS_add1_recipient_cert(cms, recip, flags))
476 CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
481 if(!(flags & CMS_DETACHED))
482 CMS_set_detached(cms, 0);
484 if ((flags & (CMS_STREAM|CMS_PARTIAL)) || CMS_final(cms, data, flags))
490 CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
493 CMS_ContentInfo_free(cms);
497 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
498 BIO *dcont, BIO *out,
501 STACK_OF(CMS_RecipientInfo) *ris;
502 CMS_RecipientInfo *ri;
505 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
507 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
510 if (!dcont && !check_content(cms))
512 ris = CMS_get0_RecipientInfos(cms);
513 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
515 ri = sk_CMS_RecipientInfo_value(ris, i);
516 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
518 /* If we have a cert try matching RecipientInfo otherwise
521 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
523 if (CMS_RecipientInfo_decrypt(cms, ri, pk) > 0)
530 if (i == sk_CMS_RecipientInfo_num(ris))
532 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_NO_MATCHING_RECIPIENT);
535 cont = CMS_dataInit(cms, dcont);
538 r = cms_copy_content(out, cont, flags);
543 int CMS_final(CMS_ContentInfo *cms, BIO *data, int flags)
547 if (!(cmsbio = CMS_dataInit(cms, NULL)))
549 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
553 SMIME_crlf_copy(data, cmsbio, flags);
555 (void)BIO_flush(cmsbio);
558 if (!CMS_dataFinal(cms, cmsbio))
560 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
567 BIO_free_all(cmsbio);
575 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
580 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
582 CMSerr(CMS_F_CMS_UNCOMPRESS,
583 CMS_R_TYPE_NOT_COMPRESSED_DATA);
587 if (!dcont && !check_content(cms))
590 cont = CMS_dataInit(cms, dcont);
593 r = cms_copy_content(out, cont, flags);
598 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
600 CMS_ContentInfo *cms;
602 comp_nid = NID_zlib_compression;
603 cms = cms_CompressedData_create(comp_nid);
607 if(!(flags & CMS_DETACHED))
608 CMS_set_detached(cms, 0);
610 if ((flags & CMS_STREAM) || CMS_final(cms, in, flags))
613 CMS_ContentInfo_free(cms);
619 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
622 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
626 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
628 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);