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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_sd.c
 
1
/* crypto/cms/cms_sd.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/x509v3.h>
 
58
#include <openssl/err.h>
 
59
#include <openssl/cms.h>
 
60
#include "cms_lcl.h"
 
61
 
 
62
/* CMS SignedData Utilities */
 
63
 
 
64
DECLARE_ASN1_ITEM(CMS_SignedData)
 
65
 
 
66
static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms)
 
67
        {
 
68
        if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed)
 
69
                {
 
70
                CMSerr(CMS_F_CMS_GET0_SIGNED, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA);
 
71
                return NULL;
 
72
                }
 
73
        return cms->d.signedData;
 
74
        }
 
75
 
 
76
static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms)
 
77
        {
 
78
        if (cms->d.other == NULL)
 
79
                {
 
80
                cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
 
81
                if (!cms->d.signedData)
 
82
                        {
 
83
                        CMSerr(CMS_F_CMS_SIGNED_DATA_INIT, ERR_R_MALLOC_FAILURE);
 
84
                        return NULL;
 
85
                        }
 
86
                cms->d.signedData->version = 1;
 
87
                cms->d.signedData->encapContentInfo->eContentType =
 
88
                                                OBJ_nid2obj(NID_pkcs7_data);
 
89
                cms->d.signedData->encapContentInfo->partial = 1;
 
90
                ASN1_OBJECT_free(cms->contentType);
 
91
                cms->contentType = OBJ_nid2obj(NID_pkcs7_signed);
 
92
                return cms->d.signedData;
 
93
                }
 
94
        return cms_get0_signed(cms);
 
95
        }
 
96
 
 
97
/* Just initialize SignedData e.g. for certs only structure */
 
98
 
 
99
int CMS_SignedData_init(CMS_ContentInfo *cms)
 
100
        {
 
101
        if (cms_signed_data_init(cms))
 
102
                return 1;
 
103
        else
 
104
                return 0;
 
105
        }
 
106
 
 
107
/* Check structures and fixup version numbers (if necessary) */
 
108
 
 
109
static void cms_sd_set_version(CMS_SignedData *sd)
 
110
        {
 
111
        int i;
 
112
        CMS_CertificateChoices *cch;
 
113
        CMS_RevocationInfoChoice *rch;
 
114
        CMS_SignerInfo *si;
 
115
 
 
116
        for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++)
 
117
                {
 
118
                cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
 
119
                if (cch->type == CMS_CERTCHOICE_OTHER)
 
120
                        {
 
121
                        if (sd->version < 5)
 
122
                                sd->version = 5;
 
123
                        }
 
124
                else if (cch->type == CMS_CERTCHOICE_V2ACERT)
 
125
                        {
 
126
                        if (sd->version < 4)
 
127
                                sd->version = 4;
 
128
                        }
 
129
                else if (cch->type == CMS_CERTCHOICE_V1ACERT)
 
130
                        {
 
131
                        if (sd->version < 3)
 
132
                                sd->version = 3;
 
133
                        }
 
134
                }
 
135
 
 
136
        for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++)
 
137
                {
 
138
                rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
 
139
                if (rch->type == CMS_REVCHOICE_OTHER)
 
140
                        {
 
141
                        if (sd->version < 5)
 
142
                                sd->version = 5;
 
143
                        }
 
144
                }
 
145
 
 
146
        if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
 
147
                        && (sd->version < 3))
 
148
                sd->version = 3;
 
149
 
 
150
        for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++)
 
151
                {
 
152
                si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
 
153
                if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
 
154
                        {
 
155
                        if (si->version < 3)
 
156
                                si->version = 3;
 
157
                        if (sd->version < 3)
 
158
                                sd->version = 3;
 
159
                        }
 
160
                else
 
161
                        sd->version = 1;
 
162
                }
 
163
 
 
164
        if (sd->version < 1)
 
165
                sd->version = 1;
 
166
 
 
167
        }
 
168
        
 
169
/* Copy an existing messageDigest value */
 
170
 
 
171
static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si)
 
172
        {
 
173
        STACK_OF(CMS_SignerInfo) *sinfos;
 
174
        CMS_SignerInfo *sitmp;
 
175
        int i;
 
176
        sinfos = CMS_get0_SignerInfos(cms);
 
177
        for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 
178
                {
 
179
                ASN1_OCTET_STRING *messageDigest;
 
180
                sitmp = sk_CMS_SignerInfo_value(sinfos, i);
 
181
                if (sitmp == si)
 
182
                        continue;
 
183
                if (CMS_signed_get_attr_count(sitmp) < 0)
 
184
                        continue;
 
185
                if (OBJ_cmp(si->digestAlgorithm->algorithm,
 
186
                                sitmp->digestAlgorithm->algorithm))
 
187
                        continue;
 
188
                messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
 
189
                                        OBJ_nid2obj(NID_pkcs9_messageDigest),
 
190
                                        -3, V_ASN1_OCTET_STRING);
 
191
                if (!messageDigest)
 
192
                        {
 
193
                        CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST,
 
194
                                CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
 
195
                        return 0;
 
196
                        }
 
197
 
 
198
                if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
 
199
                                                V_ASN1_OCTET_STRING,
 
200
                                                messageDigest, -1))
 
201
                        return 1;
 
202
                else
 
203
                        return 0;
 
204
                }
 
205
                CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST);
 
206
                return 0;
 
207
        }
 
208
 
 
209
int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type)
 
210
        {
 
211
        switch(type)
 
212
                {
 
213
                case CMS_SIGNERINFO_ISSUER_SERIAL:
 
214
                sid->d.issuerAndSerialNumber =
 
215
                        M_ASN1_new_of(CMS_IssuerAndSerialNumber);
 
216
                if (!sid->d.issuerAndSerialNumber)
 
217
                        goto merr;
 
218
                if (!X509_NAME_set(&sid->d.issuerAndSerialNumber->issuer,
 
219
                                        X509_get_issuer_name(cert)))
 
220
                        goto merr;
 
221
                ASN1_STRING_free(sid->d.issuerAndSerialNumber->serialNumber);
 
222
                sid->d.issuerAndSerialNumber->serialNumber =
 
223
                                ASN1_STRING_dup(X509_get_serialNumber(cert));
 
224
                if(!sid->d.issuerAndSerialNumber->serialNumber)
 
225
                        goto merr;
 
226
                break;
 
227
 
 
228
                case CMS_SIGNERINFO_KEYIDENTIFIER:
 
229
                if (!cert->skid)
 
230
                        {
 
231
                        CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER,
 
232
                                        CMS_R_CERTIFICATE_HAS_NO_KEYID);
 
233
                        return 0;
 
234
                        }
 
235
                sid->d.subjectKeyIdentifier = ASN1_STRING_dup(cert->skid);
 
236
                if (!sid->d.subjectKeyIdentifier)
 
237
                        goto merr;
 
238
                break;
 
239
 
 
240
                default:
 
241
                CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID);
 
242
                return 0;
 
243
                }
 
244
 
 
245
        sid->type = type;
 
246
 
 
247
        return 1;
 
248
 
 
249
        merr:
 
250
        CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, ERR_R_MALLOC_FAILURE);
 
251
        return 0;
 
252
 
 
253
        }
 
254
 
 
255
int cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid,
 
256
                                        ASN1_OCTET_STRING **keyid,
 
257
                                        X509_NAME **issuer, ASN1_INTEGER **sno)
 
258
        {
 
259
        if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
 
260
                {
 
261
                if (issuer)
 
262
                        *issuer = sid->d.issuerAndSerialNumber->issuer;
 
263
                if (sno)
 
264
                        *sno = sid->d.issuerAndSerialNumber->serialNumber;
 
265
                }
 
266
        else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
 
267
                {
 
268
                if (keyid)
 
269
                        *keyid = sid->d.subjectKeyIdentifier;
 
270
                }
 
271
        else
 
272
                return 0;
 
273
        return 1;
 
274
        }
 
275
 
 
276
int cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert)
 
277
        {
 
278
        int ret;
 
279
        if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
 
280
                {
 
281
                ret = X509_NAME_cmp(sid->d.issuerAndSerialNumber->issuer,
 
282
                                        X509_get_issuer_name(cert));
 
283
                if (ret)
 
284
                        return ret;
 
285
                return ASN1_INTEGER_cmp(sid->d.issuerAndSerialNumber->serialNumber,
 
286
                                        X509_get_serialNumber(cert));
 
287
                }
 
288
        else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
 
289
                {
 
290
                X509_check_purpose(cert, -1, -1);
 
291
                if (!cert->skid)
 
292
                        return -1;
 
293
                return ASN1_OCTET_STRING_cmp(sid->d.subjectKeyIdentifier,
 
294
                                                        cert->skid);
 
295
                }
 
296
        else
 
297
                return -1;
 
298
        }
 
299
 
 
300
CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
 
301
                        X509 *signer, EVP_PKEY *pk, const EVP_MD *md,
 
302
                        unsigned int flags)
 
303
        {
 
304
        CMS_SignedData *sd;
 
305
        CMS_SignerInfo *si = NULL;
 
306
        X509_ALGOR *alg;
 
307
        int i, type;
 
308
        if(!X509_check_private_key(signer, pk))
 
309
                {
 
310
                CMSerr(CMS_F_CMS_ADD1_SIGNER,
 
311
                        CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
 
312
                return NULL;
 
313
                }
 
314
        sd = cms_signed_data_init(cms);
 
315
        if (!sd)
 
316
                goto err;
 
317
        si = M_ASN1_new_of(CMS_SignerInfo);
 
318
        if (!si)
 
319
                goto merr;
 
320
        X509_check_purpose(signer, -1, -1);
 
321
 
 
322
        CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
 
323
        CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
 
324
 
 
325
        si->pkey = pk;
 
326
        si->signer = signer;
 
327
 
 
328
        if (flags & CMS_USE_KEYID)
 
329
                {
 
330
                si->version = 3;
 
331
                if (sd->version < 3)
 
332
                        sd->version = 3;
 
333
                type = CMS_SIGNERINFO_KEYIDENTIFIER;
 
334
                }
 
335
        else
 
336
                {
 
337
                type = CMS_SIGNERINFO_ISSUER_SERIAL;
 
338
                si->version = 1;
 
339
                }
 
340
 
 
341
        if (!cms_set1_SignerIdentifier(si->sid, signer, type))
 
342
                goto err;
 
343
 
 
344
        /* Since no EVP_PKEY_METHOD in 0.9.8 hard code SHA1 as default */
 
345
        if (md == NULL)
 
346
                md = EVP_sha1();
 
347
 
 
348
        /* OpenSSL 0.9.8 only supports SHA1 with non-RSA keys */
 
349
 
 
350
        if ((pk->type != EVP_PKEY_RSA) && (EVP_MD_type(md) != NID_sha1))
 
351
                {
 
352
                CMSerr(CMS_F_CMS_ADD1_SIGNER,
 
353
                                CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
 
354
                goto err;
 
355
                }
 
356
 
 
357
        cms_DigestAlgorithm_set(si->digestAlgorithm, md);
 
358
 
 
359
        /* See if digest is present in digestAlgorithms */
 
360
        for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++)
 
361
                {
 
362
                ASN1_OBJECT *aoid;
 
363
                alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
 
364
                X509_ALGOR_get0(&aoid, NULL, NULL, alg);
 
365
                if (OBJ_obj2nid(aoid) == EVP_MD_type(md))
 
366
                        break;
 
367
                }
 
368
 
 
369
        if (i == sk_X509_ALGOR_num(sd->digestAlgorithms))
 
370
                {
 
371
                alg = X509_ALGOR_new();
 
372
                if (!alg)
 
373
                        goto merr;
 
374
                cms_DigestAlgorithm_set(alg, md);
 
375
                if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg))
 
376
                        {
 
377
                        X509_ALGOR_free(alg);
 
378
                        goto merr;
 
379
                        }
 
380
                }
 
381
 
 
382
        /* Since we have no EVP_PKEY_ASN1_METHOD in OpenSSL 0.9.8,
 
383
         * hard code algorithm parameters.
 
384
         */
 
385
 
 
386
        switch (pk->type)
 
387
                {
 
388
 
 
389
                case EVP_PKEY_RSA:
 
390
                X509_ALGOR_set0(si->signatureAlgorithm,
 
391
                                        OBJ_nid2obj(NID_rsaEncryption),
 
392
                                        V_ASN1_NULL, 0);
 
393
                break;
 
394
 
 
395
                case EVP_PKEY_DSA:
 
396
                X509_ALGOR_set0(si->signatureAlgorithm,
 
397
                                        OBJ_nid2obj(NID_dsaWithSHA1),
 
398
                                        V_ASN1_UNDEF, 0);
 
399
                break;
 
400
 
 
401
 
 
402
                case EVP_PKEY_EC:
 
403
                X509_ALGOR_set0(si->signatureAlgorithm,
 
404
                                        OBJ_nid2obj(NID_ecdsa_with_SHA1),
 
405
                                        V_ASN1_UNDEF, 0);
 
406
                break;
 
407
 
 
408
                default:
 
409
                CMSerr(CMS_F_CMS_ADD1_SIGNER,
 
410
                                CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
 
411
                goto err;
 
412
 
 
413
                }
 
414
 
 
415
        if (!(flags & CMS_NOATTR))
 
416
                {
 
417
                /* Initialialize signed attributes strutucture so other
 
418
                 * attributes such as signing time etc are added later
 
419
                 * even if we add none here.
 
420
                 */
 
421
                if (!si->signedAttrs)
 
422
                        {
 
423
                        si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
 
424
                        if (!si->signedAttrs)
 
425
                                goto merr;
 
426
                        }
 
427
 
 
428
                if (!(flags & CMS_NOSMIMECAP))
 
429
                        {
 
430
                        STACK_OF(X509_ALGOR) *smcap = NULL;
 
431
                        i = CMS_add_standard_smimecap(&smcap);
 
432
                        if (i)
 
433
                                i = CMS_add_smimecap(si, smcap);
 
434
                        sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
 
435
                        if (!i)
 
436
                                goto merr;
 
437
                        }
 
438
                if (flags & CMS_REUSE_DIGEST)
 
439
                        {
 
440
                        if (!cms_copy_messageDigest(cms, si))
 
441
                                goto err;
 
442
                        if (!(flags & CMS_PARTIAL) &&
 
443
                                        !CMS_SignerInfo_sign(si))
 
444
                                goto err;
 
445
                        }
 
446
                }
 
447
 
 
448
        if (!(flags & CMS_NOCERTS))
 
449
                {
 
450
                /* NB ignore -1 return for duplicate cert */
 
451
                if (!CMS_add1_cert(cms, signer))
 
452
                        goto merr;
 
453
                }
 
454
 
 
455
        if (!sd->signerInfos)
 
456
                sd->signerInfos = sk_CMS_SignerInfo_new_null();
 
457
        if (!sd->signerInfos ||
 
458
                !sk_CMS_SignerInfo_push(sd->signerInfos, si))
 
459
                goto merr;
 
460
 
 
461
        return si;
 
462
 
 
463
        merr:
 
464
        CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
 
465
        err:
 
466
        if (si)
 
467
                M_ASN1_free_of(si, CMS_SignerInfo);
 
468
        return NULL;
 
469
 
 
470
        }
 
471
 
 
472
static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
 
473
        {
 
474
        ASN1_TIME *tt;
 
475
        int r = 0;
 
476
        if (t)
 
477
                tt = t;
 
478
        else
 
479
                tt = X509_gmtime_adj(NULL, 0);
 
480
 
 
481
        if (!tt)
 
482
                goto merr;
 
483
 
 
484
        if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
 
485
                                                tt->type, tt, -1) <= 0)
 
486
                goto merr;
 
487
 
 
488
        r = 1;
 
489
 
 
490
        merr:
 
491
 
 
492
        if (!t)
 
493
                ASN1_TIME_free(tt);
 
494
 
 
495
        if (!r)
 
496
                CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE);
 
497
 
 
498
        return r;
 
499
 
 
500
        }
 
501
 
 
502
STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
 
503
        {
 
504
        CMS_SignedData *sd;
 
505
        sd = cms_get0_signed(cms);
 
506
        if (!sd)
 
507
                return NULL;
 
508
        return sd->signerInfos;
 
509
        }
 
510
 
 
511
STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
 
512
        {
 
513
        STACK_OF(X509) *signers = NULL;
 
514
        STACK_OF(CMS_SignerInfo) *sinfos;
 
515
        CMS_SignerInfo *si;
 
516
        int i;
 
517
        sinfos = CMS_get0_SignerInfos(cms);
 
518
        for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 
519
                {
 
520
                si = sk_CMS_SignerInfo_value(sinfos, i);
 
521
                if (si->signer)
 
522
                        {
 
523
                        if (!signers)
 
524
                                {
 
525
                                signers = sk_X509_new_null();
 
526
                                if (!signers)
 
527
                                        return NULL;
 
528
                                }
 
529
                        if (!sk_X509_push(signers, si->signer))
 
530
                                {
 
531
                                sk_X509_free(signers);
 
532
                                return NULL;
 
533
                                }
 
534
                        }
 
535
                }
 
536
        return signers;
 
537
        }
 
538
 
 
539
void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
 
540
        {
 
541
        if (signer)
 
542
                {
 
543
                CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
 
544
                if (si->pkey)
 
545
                        EVP_PKEY_free(si->pkey);
 
546
                si->pkey = X509_get_pubkey(signer);
 
547
                }
 
548
        if (si->signer)
 
549
                X509_free(si->signer);
 
550
        si->signer = signer;
 
551
        }
 
552
 
 
553
int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
 
554
                                        ASN1_OCTET_STRING **keyid,
 
555
                                        X509_NAME **issuer, ASN1_INTEGER **sno)
 
556
        {
 
557
        return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
 
558
        }
 
559
 
 
560
int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
 
561
        {
 
562
        return cms_SignerIdentifier_cert_cmp(si->sid, cert);
 
563
        }
 
564
 
 
565
int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
 
566
                                unsigned int flags)
 
567
        {
 
568
        CMS_SignedData *sd;
 
569
        CMS_SignerInfo *si;
 
570
        CMS_CertificateChoices *cch;
 
571
        STACK_OF(CMS_CertificateChoices) *certs;
 
572
        X509 *x;
 
573
        int i, j;
 
574
        int ret = 0;
 
575
        sd = cms_get0_signed(cms);
 
576
        if (!sd)
 
577
                return -1;
 
578
        certs = sd->certificates;
 
579
        for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++)
 
580
                {
 
581
                si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
 
582
                if (si->signer)
 
583
                        continue;
 
584
 
 
585
                for (j = 0; j < sk_X509_num(scerts); j++)
 
586
                        {
 
587
                        x = sk_X509_value(scerts, j);
 
588
                        if (CMS_SignerInfo_cert_cmp(si, x) == 0)
 
589
                                {
 
590
                                CMS_SignerInfo_set1_signer_cert(si, x);
 
591
                                ret++;
 
592
                                break;
 
593
                                }
 
594
                        }
 
595
 
 
596
                if (si->signer || (flags & CMS_NOINTERN))
 
597
                        continue;
 
598
 
 
599
                for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++)
 
600
                        {
 
601
                        cch = sk_CMS_CertificateChoices_value(certs, j);
 
602
                        if (cch->type != 0)
 
603
                                continue;
 
604
                        x = cch->d.certificate;
 
605
                        if (CMS_SignerInfo_cert_cmp(si, x) == 0)
 
606
                                {
 
607
                                CMS_SignerInfo_set1_signer_cert(si, x);
 
608
                                ret++;
 
609
                                break;
 
610
                                }
 
611
                        }
 
612
                }
 
613
        return ret;
 
614
        }
 
615
 
 
616
void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk, X509 **signer,
 
617
                                        X509_ALGOR **pdig, X509_ALGOR **psig)
 
618
        {
 
619
        if (pk)
 
620
                *pk = si->pkey;
 
621
        if (signer)
 
622
                *signer = si->signer;
 
623
        if (pdig)
 
624
                *pdig = si->digestAlgorithm;
 
625
        if (psig)
 
626
                *psig = si->signatureAlgorithm;
 
627
        }
 
628
 
 
629
/* In OpenSSL 0.9.8 we have the link between digest types and public
 
630
 * key types so we need to fixup the digest type if the public key
 
631
 * type is not appropriate.
 
632
 */
 
633
 
 
634
static void cms_fixup_mctx(EVP_MD_CTX *mctx, EVP_PKEY *pkey)
 
635
        {
 
636
        if (EVP_MD_CTX_type(mctx) != NID_sha1)
 
637
                return;
 
638
#ifndef OPENSSL_NO_DSA
 
639
        if (pkey->type == EVP_PKEY_DSA)
 
640
                mctx->digest = EVP_dss1();      
 
641
#endif
 
642
#ifndef OPENSSL_NO_ECDSA
 
643
        if (pkey->type == EVP_PKEY_EC)
 
644
                mctx->digest = EVP_ecdsa();     
 
645
#endif
 
646
        }
 
647
 
 
648
static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
 
649
                                        CMS_SignerInfo *si, BIO *chain)
 
650
        {
 
651
        EVP_MD_CTX mctx;
 
652
        int r = 0;
 
653
        EVP_MD_CTX_init(&mctx);
 
654
 
 
655
 
 
656
        if (!si->pkey)
 
657
                {
 
658
                CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY);
 
659
                return 0;
 
660
                }
 
661
 
 
662
        if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
 
663
                goto err;
 
664
 
 
665
        /* If any signed attributes calculate and add messageDigest attribute */
 
666
 
 
667
        if (CMS_signed_get_attr_count(si) >= 0)
 
668
                {
 
669
                ASN1_OBJECT *ctype =
 
670
                        cms->d.signedData->encapContentInfo->eContentType; 
 
671
                unsigned char md[EVP_MAX_MD_SIZE];
 
672
                unsigned int mdlen;
 
673
                EVP_DigestFinal_ex(&mctx, md, &mdlen);
 
674
                if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
 
675
                                                V_ASN1_OCTET_STRING,
 
676
                                                md, mdlen))
 
677
                        goto err;
 
678
                /* Copy content type across */
 
679
                if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
 
680
                                        V_ASN1_OBJECT, ctype, -1) <= 0)
 
681
                        goto err;
 
682
                if (!CMS_SignerInfo_sign(si))
 
683
                        goto err;
 
684
                }
 
685
        else
 
686
                {
 
687
                unsigned char *sig;
 
688
                unsigned int siglen;
 
689
                sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
 
690
                if (!sig)
 
691
                        {
 
692
                        CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
 
693
                                        ERR_R_MALLOC_FAILURE);
 
694
                        goto err;
 
695
                        }
 
696
                cms_fixup_mctx(&mctx, si->pkey);
 
697
                if (!EVP_SignFinal(&mctx, sig, &siglen, si->pkey))
 
698
                        {
 
699
                        CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
 
700
                                        CMS_R_SIGNFINAL_ERROR);
 
701
                        OPENSSL_free(sig);
 
702
                        goto err;
 
703
                        }
 
704
                ASN1_STRING_set0(si->signature, sig, siglen);
 
705
                }
 
706
 
 
707
        r = 1;
 
708
 
 
709
        err:
 
710
        EVP_MD_CTX_cleanup(&mctx);
 
711
        return r;
 
712
 
 
713
        }
 
714
 
 
715
int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
 
716
        {
 
717
        STACK_OF(CMS_SignerInfo) *sinfos;
 
718
        CMS_SignerInfo *si;
 
719
        int i;
 
720
        sinfos = CMS_get0_SignerInfos(cms);
 
721
        for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
 
722
                {
 
723
                si = sk_CMS_SignerInfo_value(sinfos, i);
 
724
                if (!cms_SignerInfo_content_sign(cms, si, chain))
 
725
                        return 0;
 
726
                }
 
727
        cms->d.signedData->encapContentInfo->partial = 0;
 
728
        return 1;
 
729
        }
 
730
 
 
731
int CMS_SignerInfo_sign(CMS_SignerInfo *si)
 
732
        {
 
733
        EVP_MD_CTX mctx;
 
734
        unsigned char *abuf = NULL;
 
735
        int alen;
 
736
        unsigned int siglen;
 
737
        const EVP_MD *md = NULL;
 
738
 
 
739
        md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
 
740
        if (md == NULL)
 
741
                return 0;
 
742
 
 
743
        EVP_MD_CTX_init(&mctx);
 
744
 
 
745
        if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0)
 
746
                {
 
747
                if (!cms_add1_signingTime(si, NULL))
 
748
                        goto err;
 
749
                }
 
750
 
 
751
        if (EVP_SignInit_ex(&mctx, md, NULL) <= 0)
 
752
                goto err;
 
753
 
 
754
#if 0
 
755
        if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
 
756
                                EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0)
 
757
                {
 
758
                CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
 
759
                goto err;
 
760
                }
 
761
#endif
 
762
 
 
763
        alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf,
 
764
                                ASN1_ITEM_rptr(CMS_Attributes_Sign));
 
765
        if(!abuf)
 
766
                goto err;
 
767
        if (EVP_SignUpdate(&mctx, abuf, alen) <= 0)
 
768
                goto err;
 
769
        siglen = EVP_PKEY_size(si->pkey);
 
770
        OPENSSL_free(abuf);
 
771
        abuf = OPENSSL_malloc(siglen);
 
772
        if(!abuf)
 
773
                goto err;
 
774
        cms_fixup_mctx(&mctx, si->pkey);
 
775
        if (EVP_SignFinal(&mctx, abuf, &siglen, si->pkey) <= 0)
 
776
                goto err;
 
777
#if 0
 
778
        if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
 
779
                                EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0)
 
780
                {
 
781
                CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
 
782
                goto err;
 
783
                }
 
784
#endif
 
785
        EVP_MD_CTX_cleanup(&mctx);
 
786
 
 
787
        ASN1_STRING_set0(si->signature, abuf, siglen);
 
788
 
 
789
        return 1;
 
790
 
 
791
        err:
 
792
        if (abuf)
 
793
                OPENSSL_free(abuf);
 
794
        EVP_MD_CTX_cleanup(&mctx);
 
795
        return 0;
 
796
 
 
797
        }
 
798
 
 
799
int CMS_SignerInfo_verify(CMS_SignerInfo *si)
 
800
        {
 
801
        EVP_MD_CTX mctx;
 
802
        unsigned char *abuf = NULL;
 
803
        int alen, r = -1;
 
804
        const EVP_MD *md = NULL;
 
805
 
 
806
        if (!si->pkey)
 
807
                {
 
808
                CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY);
 
809
                return -1;
 
810
                }
 
811
 
 
812
        md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
 
813
        if (md == NULL)
 
814
                return -1;
 
815
        EVP_MD_CTX_init(&mctx);
 
816
        if (EVP_VerifyInit_ex(&mctx, md, NULL) <= 0)
 
817
                goto err;
 
818
 
 
819
        alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf,
 
820
                                ASN1_ITEM_rptr(CMS_Attributes_Verify));
 
821
        if(!abuf)
 
822
                goto err;
 
823
        r = EVP_VerifyUpdate(&mctx, abuf, alen);
 
824
        OPENSSL_free(abuf);
 
825
        if (r <= 0)
 
826
                {
 
827
                r = -1;
 
828
                goto err;
 
829
                }
 
830
        cms_fixup_mctx(&mctx, si->pkey);
 
831
        r = EVP_VerifyFinal(&mctx,
 
832
                        si->signature->data, si->signature->length, si->pkey);
 
833
        if (r <= 0)
 
834
                CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE);
 
835
        err:
 
836
        EVP_MD_CTX_cleanup(&mctx);
 
837
        return r;
 
838
        }
 
839
 
 
840
/* Create a chain of digest BIOs from a CMS ContentInfo */
 
841
 
 
842
BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms)
 
843
        {
 
844
        int i;
 
845
        CMS_SignedData *sd;
 
846
        BIO *chain = NULL;
 
847
        sd = cms_get0_signed(cms);
 
848
        if (!sd)
 
849
                return NULL;
 
850
        if (cms->d.signedData->encapContentInfo->partial)
 
851
                cms_sd_set_version(sd);
 
852
        for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++)
 
853
                {
 
854
                X509_ALGOR *digestAlgorithm;
 
855
                BIO *mdbio;
 
856
                digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
 
857
                mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm);
 
858
                if (!mdbio)
 
859
                        goto err;       
 
860
                if (chain)
 
861
                         BIO_push(chain, mdbio);
 
862
                else
 
863
                        chain = mdbio;
 
864
                }
 
865
        return chain;
 
866
        err:
 
867
        if (chain)
 
868
                BIO_free_all(chain);
 
869
        return NULL;
 
870
        }
 
871
 
 
872
int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
 
873
        {
 
874
        ASN1_OCTET_STRING *os = NULL;
 
875
        EVP_MD_CTX mctx;
 
876
        int r = -1;
 
877
        EVP_MD_CTX_init(&mctx);
 
878
        /* If we have any signed attributes look for messageDigest value */
 
879
        if (CMS_signed_get_attr_count(si) >= 0)
 
880
                {
 
881
                os = CMS_signed_get0_data_by_OBJ(si,
 
882
                                        OBJ_nid2obj(NID_pkcs9_messageDigest),
 
883
                                        -3, V_ASN1_OCTET_STRING);
 
884
                if (!os)
 
885
                        {
 
886
                        CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
 
887
                                CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
 
888
                        goto err;
 
889
                        }
 
890
                }
 
891
 
 
892
        if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
 
893
                goto err;
 
894
 
 
895
        /* If messageDigest found compare it */
 
896
 
 
897
        if (os)
 
898
                {
 
899
                unsigned char mval[EVP_MAX_MD_SIZE];
 
900
                unsigned int mlen;
 
901
                if (EVP_DigestFinal_ex(&mctx, mval, &mlen) <= 0)
 
902
                        {
 
903
                        CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
 
904
                                CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
 
905
                        goto err;
 
906
                        }
 
907
                if (mlen != (unsigned int)os->length)
 
908
                        {
 
909
                        CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
 
910
                                CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
 
911
                        goto err;
 
912
                        }
 
913
 
 
914
                if (memcmp(mval, os->data, mlen))
 
915
                        {
 
916
                        CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
 
917
                                CMS_R_VERIFICATION_FAILURE);
 
918
                        r = 0;
 
919
                        }
 
920
                else
 
921
                        r = 1;
 
922
                }
 
923
        else
 
924
                {
 
925
                cms_fixup_mctx(&mctx, si->pkey);
 
926
                r = EVP_VerifyFinal(&mctx, si->signature->data,
 
927
                                        si->signature->length, si->pkey);
 
928
                if (r <= 0)
 
929
                        {
 
930
                        CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
 
931
                                CMS_R_VERIFICATION_FAILURE);
 
932
                        r = 0;
 
933
                        }
 
934
                }
 
935
 
 
936
        err:
 
937
        EVP_MD_CTX_cleanup(&mctx);
 
938
        return r;
 
939
 
 
940
        }
 
941
 
 
942
int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
 
943
        {
 
944
        unsigned char *smder = NULL;
 
945
        int smderlen, r;
 
946
        smderlen = i2d_X509_ALGORS(algs, &smder);
 
947
        if (smderlen <= 0)
 
948
                return 0;
 
949
        r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
 
950
                                        V_ASN1_SEQUENCE, smder, smderlen);
 
951
        OPENSSL_free(smder);
 
952
        return r;
 
953
        }
 
954
 
 
955
int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
 
956
                                int algnid, int keysize)
 
957
        {
 
958
        X509_ALGOR *alg;
 
959
        ASN1_INTEGER *key = NULL;
 
960
        if (keysize > 0)
 
961
                {
 
962
                key = ASN1_INTEGER_new();
 
963
                if (!key || !ASN1_INTEGER_set(key, keysize))
 
964
                        return 0;
 
965
                }
 
966
        alg = X509_ALGOR_new();
 
967
        if (!alg)
 
968
                {
 
969
                if (key)
 
970
                        ASN1_INTEGER_free(key);
 
971
                return 0;
 
972
                }
 
973
                
 
974
        X509_ALGOR_set0(alg, OBJ_nid2obj(algnid),
 
975
                                key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key);
 
976
        if (!*algs)
 
977
                *algs = sk_X509_ALGOR_new_null();
 
978
        if (!*algs || !sk_X509_ALGOR_push(*algs, alg))
 
979
                {
 
980
                X509_ALGOR_free(alg);
 
981
                return 0;
 
982
                }
 
983
        return 1;
 
984
        }
 
985
 
 
986
/* Check to see if a cipher exists and if so add S/MIME capabilities */
 
987
 
 
988
static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
 
989
        {
 
990
        if (EVP_get_cipherbynid(nid))
 
991
                return CMS_add_simple_smimecap(sk, nid, arg);
 
992
        return 1;
 
993
        }
 
994
#if 0
 
995
static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
 
996
        {
 
997
        if (EVP_get_digestbynid(nid))
 
998
                return CMS_add_simple_smimecap(sk, nid, arg);
 
999
        return 1;
 
1000
        }
 
1001
#endif
 
1002
int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
 
1003
        {
 
1004
        if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
 
1005
                || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
 
1006
                || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
 
1007
                || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
 
1008
                || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
 
1009
                || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
 
1010
                || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
 
1011
                || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
 
1012
                return 0;
 
1013
        return 1;
 
1014
        }