1 /* crypto/cms/cms_ess.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5 /* ====================================================================
6 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
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
18 * distribution.
19 *
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/)"
24 *
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.
29 *
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.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
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 * ====================================================================
52 */
53
54 #include "cryptlib.h"
55 #include <openssl/asn1t.h>
56 #include <openssl/pem.h>
57 #include <openssl/rand.h>
58 #include <openssl/x509v3.h>
59 #include <openssl/err.h>
60 #include <openssl/cms.h>
61 #include "cms_lcl.h"
62
63 DECLARE_ASN1_ITEM(CMS_ReceiptRequest)
64 DECLARE_ASN1_ITEM(CMS_Receipt)
65
66 IMPLEMENT_ASN1_FUNCTIONS(CMS_ReceiptRequest)
67
68 /* ESS services: for now just Signed Receipt related */
69
70 int CMS_get1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest **prr)
71 {
72 ASN1_STRING *str;
73 CMS_ReceiptRequest *rr = NULL;
74 if (prr)
75 *prr = NULL;
76 str = CMS_signed_get0_data_by_OBJ(si,
77 OBJ_nid2obj(NID_id_smime_aa_receiptRequest),
78 -3, V_ASN1_SEQUENCE);
79 if (!str)
80 return 0;
81
82 rr = ASN1_item_unpack(str, ASN1_ITEM_rptr(CMS_ReceiptRequest));
83 if (!rr)
84 return -1;
85 if (prr)
86 *prr = rr;
87 else
88 CMS_ReceiptRequest_free(rr);
89 return 1;
90 }
91
92 CMS_ReceiptRequest *CMS_ReceiptRequest_create0(unsigned char *id, int idlen,
93 int allorfirst,
94 STACK_OF(GENERAL_NAMES) *receiptList,
95 STACK_OF(GENERAL_NAMES) *receiptsTo)
96 {
97 CMS_ReceiptRequest *rr = NULL;
98
99 rr = CMS_ReceiptRequest_new();
100 if (!rr)
101 goto merr;
102 if (id)
103 ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
104 else
105 {
106 if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32))
107 goto merr;
108 if (RAND_pseudo_bytes(rr->signedContentIdentifier->data, 32)
109 <= 0)
110 goto err;
111 }
112
113 sk_GENERAL_NAMES_pop_free(rr->receiptsTo, GENERAL_NAMES_free);
114 rr->receiptsTo = receiptsTo;
115
116 if (receiptList)
117 {
118 rr->receiptsFrom->type = 1;
119 rr->receiptsFrom->d.receiptList = receiptList;
120 }
121 else
122 {
123 rr->receiptsFrom->type = 0;
124 rr->receiptsFrom->d.allOrFirstTier = allorfirst;
125 }
126
127 return rr;
128
129 merr:
130 CMSerr(CMS_F_CMS_RECEIPTREQUEST_CREATE0, ERR_R_MALLOC_FAILURE);
131
132 err:
133 if (rr)
134 CMS_ReceiptRequest_free(rr);
135
136 return NULL;
137
138 }
139
140 int CMS_add1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest *rr)
141 {
142 unsigned char *rrder = NULL;
143 int rrderlen, r = 0;
144
145 rrderlen = i2d_CMS_ReceiptRequest(rr, &rrder);
146 if (rrderlen < 0)
147 goto merr;
148
149 if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
150 V_ASN1_SEQUENCE, rrder, rrderlen))
151 goto merr;
152
153 r = 1;
154
155 merr:
156 if (!r)
157 CMSerr(CMS_F_CMS_ADD1_RECEIPTREQUEST, ERR_R_MALLOC_FAILURE);
158
159 if (rrder)
160 OPENSSL_free(rrder);
161
162 return r;
163
164 }
165
166 void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr,
167 ASN1_STRING **pcid,
168 int *pallorfirst,
169 STACK_OF(GENERAL_NAMES) **plist,
170 STACK_OF(GENERAL_NAMES) **prto)
171 {
172 if (pcid)
173 *pcid = rr->signedContentIdentifier;
174 if (rr->receiptsFrom->type == 0)
175 {
176 if (pallorfirst)
177 *pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
178 if (plist)
179 *plist = NULL;
180 }
181 else
182 {
183 if (pallorfirst)
184 *pallorfirst = -1;
185 if (plist)
186 *plist = rr->receiptsFrom->d.receiptList;
187 }
188 if (prto)
189 *prto = rr->receiptsTo;
190 }
191
192 /* Digest a SignerInfo structure for msgSigDigest attribute processing */
193
194 static int cms_msgSigDigest(CMS_SignerInfo *si,
195 unsigned char *dig, unsigned int *diglen)
196 {
197 const EVP_MD *md;
198 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
199 if (md == NULL)
200 return 0;
201 if (!ASN1_item_digest(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
202 si->signedAttrs, dig, diglen))
203 return 0;
204 return 1;
205 }
206
207 /* Add a msgSigDigest attribute to a SignerInfo */
208
209 int cms_msgSigDigest_add1(CMS_SignerInfo *dest, CMS_SignerInfo *src)
210 {
211 unsigned char dig[EVP_MAX_MD_SIZE];
212 unsigned int diglen;
213 if (!cms_msgSigDigest(src, dig, &diglen))
214 {
215 CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, CMS_R_MSGSIGDIGEST_ERROR);
216 return 0;
217 }
218 if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
219 V_ASN1_OCTET_STRING, dig, diglen))
220 {
221 CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, ERR_R_MALLOC_FAILURE);
222 return 0;
223 }
224 return 1;
225 }
226
227 /* Verify signed receipt after it has already passed normal CMS verify */
228
229 int cms_Receipt_verify(CMS_ContentInfo *cms, CMS_ContentInfo *req_cms)
230 {
231 int r = 0, i;
232 CMS_ReceiptRequest *rr = NULL;
233 CMS_Receipt *rct = NULL;
234 STACK_OF(CMS_SignerInfo) *sis, *osis;
235 CMS_SignerInfo *si, *osi = NULL;
236 ASN1_OCTET_STRING *msig, **pcont;
237 ASN1_OBJECT *octype;
238 unsigned char dig[EVP_MAX_MD_SIZE];
239 unsigned int diglen;
240
241 /* Get SignerInfos, also checks SignedData content type */
242 osis = CMS_get0_SignerInfos(req_cms);
243 sis = CMS_get0_SignerInfos(cms);
244 if (!osis || !sis)
245 goto err;
246
247 if (sk_CMS_SignerInfo_num(sis) != 1)
248 {
249 CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NEED_ONE_SIGNER);
250 goto err;
251 }
252
253 /* Check receipt content type */
254 if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != NID_id_smime_ct_receipt)
255 {
256 CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NOT_A_SIGNED_RECEIPT);
257 goto err;
258 }
259
260 /* Extract and decode receipt content */
261 pcont = CMS_get0_content(cms);
262 if (!pcont || !*pcont)
263 {
264 CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT);
265 goto err;
266 }
267
268 rct = ASN1_item_unpack(*pcont, ASN1_ITEM_rptr(CMS_Receipt));
269
270 if (!rct)
271 {
272 CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_RECEIPT_DECODE_ERROR);
273 goto err;
274 }
275
276 /* Locate original request */
277
278 for (i = 0; i < sk_CMS_SignerInfo_num(osis); i++)
279 {
280 osi = sk_CMS_SignerInfo_value(osis, i);
281 if (!ASN1_STRING_cmp(osi->signature,
282 rct->originatorSignatureValue))
283 break;
284 }
285
286 if (i == sk_CMS_SignerInfo_num(osis))
287 {
288 CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MATCHING_SIGNATURE);
289 goto err;
290 }
291
292 si = sk_CMS_SignerInfo_value(sis, 0);
293
294 /* Get msgSigDigest value and compare */
295
296 msig = CMS_signed_get0_data_by_OBJ(si,
297 OBJ_nid2obj(NID_id_smime_aa_msgSigDigest),
298 -3, V_ASN1_OCTET_STRING);
299
300 if (!msig)
301 {
302 CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_MSGSIGDIGEST);
303 goto err;
304 }
305
306 if (!cms_msgSigDigest(osi, dig, &diglen))
307 {
308 CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_MSGSIGDIGEST_ERROR);
309 goto err;
310 }
311
312 if (diglen != (unsigned int)msig->length)
313 {
314 CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
315 CMS_R_MSGSIGDIGEST_WRONG_LENGTH);
316 goto err;
317 }
318
319 if (memcmp(dig, msig->data, diglen))
320 {
321 CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
322 CMS_R_MSGSIGDIGEST_VERIFICATION_FAILURE);
323 goto err;
324 }
325
326 /* Compare content types */
327
328 octype = CMS_signed_get0_data_by_OBJ(osi,
329 OBJ_nid2obj(NID_pkcs9_contentType),
330 -3, V_ASN1_OBJECT);
331 if (!octype)
332 {
333 CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_CONTENT_TYPE);
334 goto err;
335 }
336
337 /* Compare details in receipt request */
338
339 if (OBJ_cmp(octype, rct->contentType))
340 {
341 CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_CONTENT_TYPE_MISMATCH);
342 goto err;
343 }
344
345 /* Get original receipt request details */
346
347 if (CMS_get1_ReceiptRequest(osi, &rr) <= 0)
348 {
349 CMSerr(CMS_F_CMS_RECEIPT_VERIFY, CMS_R_NO_RECEIPT_REQUEST);
350 goto err;
351 }
352
353 if (ASN1_STRING_cmp(rr->signedContentIdentifier,
354 rct->signedContentIdentifier))
355 {
356 CMSerr(CMS_F_CMS_RECEIPT_VERIFY,
357 CMS_R_CONTENTIDENTIFIER_MISMATCH);
358 goto err;
359 }
360
361 r = 1;
362
363 err:
364 if (rr)
365 CMS_ReceiptRequest_free(rr);
366 if (rct)
367 M_ASN1_free_of(rct, CMS_Receipt);
368
369 return r;
370
371 }
372
373 /* Encode a Receipt into an OCTET STRING read for including into content of
374 * a SignedData ContentInfo.
375 */
376
377 ASN1_OCTET_STRING *cms_encode_Receipt(CMS_SignerInfo *si)
378 {
379 CMS_Receipt rct;
380 CMS_ReceiptRequest *rr = NULL;
381 ASN1_OBJECT *ctype;
382 ASN1_OCTET_STRING *os = NULL;
383
384 /* Get original receipt request */
385
386 /* Get original receipt request details */
387
388 if (CMS_get1_ReceiptRequest(si, &rr) <= 0)
389 {
390 CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_RECEIPT_REQUEST);
391 goto err;
392 }
393
394 /* Get original content type */
395
396 ctype = CMS_signed_get0_data_by_OBJ(si,
397 OBJ_nid2obj(NID_pkcs9_contentType),
398 -3, V_ASN1_OBJECT);
399 if (!ctype)
400 {
401 CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_CONTENT_TYPE);
402 goto err;
403 }
404
405 rct.version = 1;
406 rct.contentType = ctype;
407 rct.signedContentIdentifier = rr->signedContentIdentifier;
408 rct.originatorSignatureValue = si->signature;
409
410 os = ASN1_item_pack(&rct, ASN1_ITEM_rptr(CMS_Receipt), NULL);
411
412 err:
413 if (rr)
414 CMS_ReceiptRequest_free(rr);
415
416 return os;
417
418 }