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cms_ess.c
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1 /* crypto/cms/cms_ess.c */
2 /* Written by Dr Stephen N Henson ([email protected]) 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  * [email protected].
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  }
419 
420 
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