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  • Committer: Bazaar Package Importer
  • Author(s): Kurt Roeckx
  • Date: 2009-06-13 18:15:46 UTC
  • mto: (11.1.5 squeeze)
  • mto: This revision was merged to the branch mainline in revision 34.
  • Revision ID: james.westby@ubuntu.com-20090613181546-vbfntai3b009dl1u
Tags: upstream-0.9.8k
Import upstream version 0.9.8k

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crypto/cms/cms_ess.c
 
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_const(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))
 
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))
 
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