1/* crypto/cms/cms_asn1.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 * project.
5 */
6/* ====================================================================
7 * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in
18 *    the documentation and/or other materials provided with the
19 *    distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 *    software must display the following acknowledgment:
23 *    "This product includes software developed by the OpenSSL Project
24 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 *    endorse or promote products derived from this software without
28 *    prior written permission. For written permission, please contact
29 *    licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 *    nor may "OpenSSL" appear in their names without prior written
33 *    permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 */
54
55#include <openssl/asn1t.h>
56#include <openssl/pem.h>
57#include <openssl/x509v3.h>
58#include "cms.h"
59#include "cms_lcl.h"
60
61
62ASN1_SEQUENCE(CMS_IssuerAndSerialNumber) = {
63        ASN1_SIMPLE(CMS_IssuerAndSerialNumber, issuer, X509_NAME),
64        ASN1_SIMPLE(CMS_IssuerAndSerialNumber, serialNumber, ASN1_INTEGER)
65} ASN1_SEQUENCE_END(CMS_IssuerAndSerialNumber)
66
67ASN1_SEQUENCE(CMS_OtherCertificateFormat) = {
68        ASN1_SIMPLE(CMS_OtherCertificateFormat, otherCertFormat, ASN1_OBJECT),
69        ASN1_OPT(CMS_OtherCertificateFormat, otherCert, ASN1_ANY)
70} ASN1_SEQUENCE_END(CMS_OtherCertificateFormat)
71
72ASN1_CHOICE(CMS_CertificateChoices) = {
73        ASN1_SIMPLE(CMS_CertificateChoices, d.certificate, X509),
74        ASN1_IMP(CMS_CertificateChoices, d.extendedCertificate, ASN1_SEQUENCE, 0),
75        ASN1_IMP(CMS_CertificateChoices, d.v1AttrCert, ASN1_SEQUENCE, 1),
76        ASN1_IMP(CMS_CertificateChoices, d.v2AttrCert, ASN1_SEQUENCE, 2),
77        ASN1_IMP(CMS_CertificateChoices, d.other, CMS_OtherCertificateFormat, 3)
78} ASN1_CHOICE_END(CMS_CertificateChoices)
79
80ASN1_CHOICE(CMS_SignerIdentifier) = {
81        ASN1_SIMPLE(CMS_SignerIdentifier, d.issuerAndSerialNumber, CMS_IssuerAndSerialNumber),
82        ASN1_IMP(CMS_SignerIdentifier, d.subjectKeyIdentifier, ASN1_OCTET_STRING, 0)
83} ASN1_CHOICE_END(CMS_SignerIdentifier)
84
85ASN1_NDEF_SEQUENCE(CMS_EncapsulatedContentInfo) = {
86        ASN1_SIMPLE(CMS_EncapsulatedContentInfo, eContentType, ASN1_OBJECT),
87        ASN1_NDEF_EXP_OPT(CMS_EncapsulatedContentInfo, eContent, ASN1_OCTET_STRING_NDEF, 0)
88} ASN1_NDEF_SEQUENCE_END(CMS_EncapsulatedContentInfo)
89
90/* Minor tweak to operation: free up signer key, cert */
91static int cms_si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
92                     void *exarg)
93{
94    if (operation == ASN1_OP_FREE_POST) {
95        CMS_SignerInfo *si = (CMS_SignerInfo *)*pval;
96        if (si->pkey)
97            EVP_PKEY_free(si->pkey);
98        if (si->signer)
99            X509_free(si->signer);
100        if (si->pctx)
101            EVP_MD_CTX_cleanup(&si->mctx);
102    }
103    return 1;
104}
105
106ASN1_SEQUENCE_cb(CMS_SignerInfo, cms_si_cb) = {
107        ASN1_SIMPLE(CMS_SignerInfo, version, LONG),
108        ASN1_SIMPLE(CMS_SignerInfo, sid, CMS_SignerIdentifier),
109        ASN1_SIMPLE(CMS_SignerInfo, digestAlgorithm, X509_ALGOR),
110        ASN1_IMP_SET_OF_OPT(CMS_SignerInfo, signedAttrs, X509_ATTRIBUTE, 0),
111        ASN1_SIMPLE(CMS_SignerInfo, signatureAlgorithm, X509_ALGOR),
112        ASN1_SIMPLE(CMS_SignerInfo, signature, ASN1_OCTET_STRING),
113        ASN1_IMP_SET_OF_OPT(CMS_SignerInfo, unsignedAttrs, X509_ATTRIBUTE, 1)
114} ASN1_SEQUENCE_END_cb(CMS_SignerInfo, CMS_SignerInfo)
115
116ASN1_SEQUENCE(CMS_OtherRevocationInfoFormat) = {
117        ASN1_SIMPLE(CMS_OtherRevocationInfoFormat, otherRevInfoFormat, ASN1_OBJECT),
118        ASN1_OPT(CMS_OtherRevocationInfoFormat, otherRevInfo, ASN1_ANY)
119} ASN1_SEQUENCE_END(CMS_OtherRevocationInfoFormat)
120
121ASN1_CHOICE(CMS_RevocationInfoChoice) = {
122        ASN1_SIMPLE(CMS_RevocationInfoChoice, d.crl, X509_CRL),
123        ASN1_IMP(CMS_RevocationInfoChoice, d.other, CMS_OtherRevocationInfoFormat, 1)
124} ASN1_CHOICE_END(CMS_RevocationInfoChoice)
125
126ASN1_NDEF_SEQUENCE(CMS_SignedData) = {
127        ASN1_SIMPLE(CMS_SignedData, version, LONG),
128        ASN1_SET_OF(CMS_SignedData, digestAlgorithms, X509_ALGOR),
129        ASN1_SIMPLE(CMS_SignedData, encapContentInfo, CMS_EncapsulatedContentInfo),
130        ASN1_IMP_SET_OF_OPT(CMS_SignedData, certificates, CMS_CertificateChoices, 0),
131        ASN1_IMP_SET_OF_OPT(CMS_SignedData, crls, CMS_RevocationInfoChoice, 1),
132        ASN1_SET_OF(CMS_SignedData, signerInfos, CMS_SignerInfo)
133} ASN1_NDEF_SEQUENCE_END(CMS_SignedData)
134
135ASN1_SEQUENCE(CMS_OriginatorInfo) = {
136        ASN1_IMP_SET_OF_OPT(CMS_OriginatorInfo, certificates, CMS_CertificateChoices, 0),
137        ASN1_IMP_SET_OF_OPT(CMS_OriginatorInfo, crls, CMS_RevocationInfoChoice, 1)
138} ASN1_SEQUENCE_END(CMS_OriginatorInfo)
139
140ASN1_NDEF_SEQUENCE(CMS_EncryptedContentInfo) = {
141        ASN1_SIMPLE(CMS_EncryptedContentInfo, contentType, ASN1_OBJECT),
142        ASN1_SIMPLE(CMS_EncryptedContentInfo, contentEncryptionAlgorithm, X509_ALGOR),
143        ASN1_IMP_OPT(CMS_EncryptedContentInfo, encryptedContent, ASN1_OCTET_STRING_NDEF, 0)
144} ASN1_NDEF_SEQUENCE_END(CMS_EncryptedContentInfo)
145
146ASN1_SEQUENCE(CMS_KeyTransRecipientInfo) = {
147        ASN1_SIMPLE(CMS_KeyTransRecipientInfo, version, LONG),
148        ASN1_SIMPLE(CMS_KeyTransRecipientInfo, rid, CMS_SignerIdentifier),
149        ASN1_SIMPLE(CMS_KeyTransRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR),
150        ASN1_SIMPLE(CMS_KeyTransRecipientInfo, encryptedKey, ASN1_OCTET_STRING)
151} ASN1_SEQUENCE_END(CMS_KeyTransRecipientInfo)
152
153ASN1_SEQUENCE(CMS_OtherKeyAttribute) = {
154        ASN1_SIMPLE(CMS_OtherKeyAttribute, keyAttrId, ASN1_OBJECT),
155        ASN1_OPT(CMS_OtherKeyAttribute, keyAttr, ASN1_ANY)
156} ASN1_SEQUENCE_END(CMS_OtherKeyAttribute)
157
158ASN1_SEQUENCE(CMS_RecipientKeyIdentifier) = {
159        ASN1_SIMPLE(CMS_RecipientKeyIdentifier, subjectKeyIdentifier, ASN1_OCTET_STRING),
160        ASN1_OPT(CMS_RecipientKeyIdentifier, date, ASN1_GENERALIZEDTIME),
161        ASN1_OPT(CMS_RecipientKeyIdentifier, other, CMS_OtherKeyAttribute)
162} ASN1_SEQUENCE_END(CMS_RecipientKeyIdentifier)
163
164ASN1_CHOICE(CMS_KeyAgreeRecipientIdentifier) = {
165  ASN1_SIMPLE(CMS_KeyAgreeRecipientIdentifier, d.issuerAndSerialNumber, CMS_IssuerAndSerialNumber),
166  ASN1_IMP(CMS_KeyAgreeRecipientIdentifier, d.rKeyId, CMS_RecipientKeyIdentifier, 0)
167} ASN1_CHOICE_END(CMS_KeyAgreeRecipientIdentifier)
168
169static int cms_rek_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
170                      void *exarg)
171{
172    CMS_RecipientEncryptedKey *rek = (CMS_RecipientEncryptedKey *)*pval;
173    if (operation == ASN1_OP_FREE_POST) {
174        if (rek->pkey)
175            EVP_PKEY_free(rek->pkey);
176    }
177    return 1;
178}
179
180ASN1_SEQUENCE_cb(CMS_RecipientEncryptedKey, cms_rek_cb) = {
181        ASN1_SIMPLE(CMS_RecipientEncryptedKey, rid, CMS_KeyAgreeRecipientIdentifier),
182        ASN1_SIMPLE(CMS_RecipientEncryptedKey, encryptedKey, ASN1_OCTET_STRING)
183} ASN1_SEQUENCE_END_cb(CMS_RecipientEncryptedKey, CMS_RecipientEncryptedKey)
184
185ASN1_SEQUENCE(CMS_OriginatorPublicKey) = {
186  ASN1_SIMPLE(CMS_OriginatorPublicKey, algorithm, X509_ALGOR),
187  ASN1_SIMPLE(CMS_OriginatorPublicKey, publicKey, ASN1_BIT_STRING)
188} ASN1_SEQUENCE_END(CMS_OriginatorPublicKey)
189
190ASN1_CHOICE(CMS_OriginatorIdentifierOrKey) = {
191  ASN1_SIMPLE(CMS_OriginatorIdentifierOrKey, d.issuerAndSerialNumber, CMS_IssuerAndSerialNumber),
192  ASN1_IMP(CMS_OriginatorIdentifierOrKey, d.subjectKeyIdentifier, ASN1_OCTET_STRING, 0),
193  ASN1_IMP(CMS_OriginatorIdentifierOrKey, d.originatorKey, CMS_OriginatorPublicKey, 1)
194} ASN1_CHOICE_END(CMS_OriginatorIdentifierOrKey)
195
196static int cms_kari_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
197                       void *exarg)
198{
199    CMS_KeyAgreeRecipientInfo *kari = (CMS_KeyAgreeRecipientInfo *)*pval;
200    if (operation == ASN1_OP_NEW_POST) {
201        EVP_CIPHER_CTX_init(&kari->ctx);
202        EVP_CIPHER_CTX_set_flags(&kari->ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW);
203        kari->pctx = NULL;
204    } else if (operation == ASN1_OP_FREE_POST) {
205        if (kari->pctx)
206            EVP_PKEY_CTX_free(kari->pctx);
207        EVP_CIPHER_CTX_cleanup(&kari->ctx);
208    }
209    return 1;
210}
211
212ASN1_SEQUENCE_cb(CMS_KeyAgreeRecipientInfo, cms_kari_cb) = {
213        ASN1_SIMPLE(CMS_KeyAgreeRecipientInfo, version, LONG),
214        ASN1_EXP(CMS_KeyAgreeRecipientInfo, originator, CMS_OriginatorIdentifierOrKey, 0),
215        ASN1_EXP_OPT(CMS_KeyAgreeRecipientInfo, ukm, ASN1_OCTET_STRING, 1),
216        ASN1_SIMPLE(CMS_KeyAgreeRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR),
217        ASN1_SEQUENCE_OF(CMS_KeyAgreeRecipientInfo, recipientEncryptedKeys, CMS_RecipientEncryptedKey)
218} ASN1_SEQUENCE_END_cb(CMS_KeyAgreeRecipientInfo, CMS_KeyAgreeRecipientInfo)
219
220ASN1_SEQUENCE(CMS_KEKIdentifier) = {
221        ASN1_SIMPLE(CMS_KEKIdentifier, keyIdentifier, ASN1_OCTET_STRING),
222        ASN1_OPT(CMS_KEKIdentifier, date, ASN1_GENERALIZEDTIME),
223        ASN1_OPT(CMS_KEKIdentifier, other, CMS_OtherKeyAttribute)
224} ASN1_SEQUENCE_END(CMS_KEKIdentifier)
225
226ASN1_SEQUENCE(CMS_KEKRecipientInfo) = {
227        ASN1_SIMPLE(CMS_KEKRecipientInfo, version, LONG),
228        ASN1_SIMPLE(CMS_KEKRecipientInfo, kekid, CMS_KEKIdentifier),
229        ASN1_SIMPLE(CMS_KEKRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR),
230        ASN1_SIMPLE(CMS_KEKRecipientInfo, encryptedKey, ASN1_OCTET_STRING)
231} ASN1_SEQUENCE_END(CMS_KEKRecipientInfo)
232
233ASN1_SEQUENCE(CMS_PasswordRecipientInfo) = {
234        ASN1_SIMPLE(CMS_PasswordRecipientInfo, version, LONG),
235        ASN1_IMP_OPT(CMS_PasswordRecipientInfo, keyDerivationAlgorithm, X509_ALGOR, 0),
236        ASN1_SIMPLE(CMS_PasswordRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR),
237        ASN1_SIMPLE(CMS_PasswordRecipientInfo, encryptedKey, ASN1_OCTET_STRING)
238} ASN1_SEQUENCE_END(CMS_PasswordRecipientInfo)
239
240ASN1_SEQUENCE(CMS_OtherRecipientInfo) = {
241  ASN1_SIMPLE(CMS_OtherRecipientInfo, oriType, ASN1_OBJECT),
242  ASN1_OPT(CMS_OtherRecipientInfo, oriValue, ASN1_ANY)
243} ASN1_SEQUENCE_END(CMS_OtherRecipientInfo)
244
245/* Free up RecipientInfo additional data */
246static int cms_ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
247                     void *exarg)
248{
249    if (operation == ASN1_OP_FREE_PRE) {
250        CMS_RecipientInfo *ri = (CMS_RecipientInfo *)*pval;
251        if (ri->type == CMS_RECIPINFO_TRANS) {
252            CMS_KeyTransRecipientInfo *ktri = ri->d.ktri;
253            if (ktri->pkey)
254                EVP_PKEY_free(ktri->pkey);
255            if (ktri->recip)
256                X509_free(ktri->recip);
257            if (ktri->pctx)
258                EVP_PKEY_CTX_free(ktri->pctx);
259        } else if (ri->type == CMS_RECIPINFO_KEK) {
260            CMS_KEKRecipientInfo *kekri = ri->d.kekri;
261            if (kekri->key) {
262                OPENSSL_cleanse(kekri->key, kekri->keylen);
263                OPENSSL_free(kekri->key);
264            }
265        } else if (ri->type == CMS_RECIPINFO_PASS) {
266            CMS_PasswordRecipientInfo *pwri = ri->d.pwri;
267            if (pwri->pass) {
268                OPENSSL_cleanse(pwri->pass, pwri->passlen);
269                OPENSSL_free(pwri->pass);
270            }
271        }
272    }
273    return 1;
274}
275
276ASN1_CHOICE_cb(CMS_RecipientInfo, cms_ri_cb) = {
277        ASN1_SIMPLE(CMS_RecipientInfo, d.ktri, CMS_KeyTransRecipientInfo),
278        ASN1_IMP(CMS_RecipientInfo, d.kari, CMS_KeyAgreeRecipientInfo, 1),
279        ASN1_IMP(CMS_RecipientInfo, d.kekri, CMS_KEKRecipientInfo, 2),
280        ASN1_IMP(CMS_RecipientInfo, d.pwri, CMS_PasswordRecipientInfo, 3),
281        ASN1_IMP(CMS_RecipientInfo, d.ori, CMS_OtherRecipientInfo, 4)
282} ASN1_CHOICE_END_cb(CMS_RecipientInfo, CMS_RecipientInfo, type)
283
284ASN1_NDEF_SEQUENCE(CMS_EnvelopedData) = {
285        ASN1_SIMPLE(CMS_EnvelopedData, version, LONG),
286        ASN1_IMP_OPT(CMS_EnvelopedData, originatorInfo, CMS_OriginatorInfo, 0),
287        ASN1_SET_OF(CMS_EnvelopedData, recipientInfos, CMS_RecipientInfo),
288        ASN1_SIMPLE(CMS_EnvelopedData, encryptedContentInfo, CMS_EncryptedContentInfo),
289        ASN1_IMP_SET_OF_OPT(CMS_EnvelopedData, unprotectedAttrs, X509_ATTRIBUTE, 1)
290} ASN1_NDEF_SEQUENCE_END(CMS_EnvelopedData)
291
292ASN1_NDEF_SEQUENCE(CMS_DigestedData) = {
293        ASN1_SIMPLE(CMS_DigestedData, version, LONG),
294        ASN1_SIMPLE(CMS_DigestedData, digestAlgorithm, X509_ALGOR),
295        ASN1_SIMPLE(CMS_DigestedData, encapContentInfo, CMS_EncapsulatedContentInfo),
296        ASN1_SIMPLE(CMS_DigestedData, digest, ASN1_OCTET_STRING)
297} ASN1_NDEF_SEQUENCE_END(CMS_DigestedData)
298
299ASN1_NDEF_SEQUENCE(CMS_EncryptedData) = {
300        ASN1_SIMPLE(CMS_EncryptedData, version, LONG),
301        ASN1_SIMPLE(CMS_EncryptedData, encryptedContentInfo, CMS_EncryptedContentInfo),
302        ASN1_IMP_SET_OF_OPT(CMS_EncryptedData, unprotectedAttrs, X509_ATTRIBUTE, 1)
303} ASN1_NDEF_SEQUENCE_END(CMS_EncryptedData)
304
305ASN1_NDEF_SEQUENCE(CMS_AuthenticatedData) = {
306        ASN1_SIMPLE(CMS_AuthenticatedData, version, LONG),
307        ASN1_IMP_OPT(CMS_AuthenticatedData, originatorInfo, CMS_OriginatorInfo, 0),
308        ASN1_SET_OF(CMS_AuthenticatedData, recipientInfos, CMS_RecipientInfo),
309        ASN1_SIMPLE(CMS_AuthenticatedData, macAlgorithm, X509_ALGOR),
310        ASN1_IMP(CMS_AuthenticatedData, digestAlgorithm, X509_ALGOR, 1),
311        ASN1_SIMPLE(CMS_AuthenticatedData, encapContentInfo, CMS_EncapsulatedContentInfo),
312        ASN1_IMP_SET_OF_OPT(CMS_AuthenticatedData, authAttrs, X509_ALGOR, 2),
313        ASN1_SIMPLE(CMS_AuthenticatedData, mac, ASN1_OCTET_STRING),
314        ASN1_IMP_SET_OF_OPT(CMS_AuthenticatedData, unauthAttrs, X509_ALGOR, 3)
315} ASN1_NDEF_SEQUENCE_END(CMS_AuthenticatedData)
316
317ASN1_NDEF_SEQUENCE(CMS_CompressedData) = {
318        ASN1_SIMPLE(CMS_CompressedData, version, LONG),
319        ASN1_SIMPLE(CMS_CompressedData, compressionAlgorithm, X509_ALGOR),
320        ASN1_SIMPLE(CMS_CompressedData, encapContentInfo, CMS_EncapsulatedContentInfo),
321} ASN1_NDEF_SEQUENCE_END(CMS_CompressedData)
322
323/* This is the ANY DEFINED BY table for the top level ContentInfo structure */
324
325ASN1_ADB_TEMPLATE(cms_default) = ASN1_EXP(CMS_ContentInfo, d.other, ASN1_ANY, 0);
326
327ASN1_ADB(CMS_ContentInfo) = {
328        ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP(CMS_ContentInfo, d.data, ASN1_OCTET_STRING_NDEF, 0)),
329        ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP(CMS_ContentInfo, d.signedData, CMS_SignedData, 0)),
330        ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP(CMS_ContentInfo, d.envelopedData, CMS_EnvelopedData, 0)),
331        ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP(CMS_ContentInfo, d.digestedData, CMS_DigestedData, 0)),
332        ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP(CMS_ContentInfo, d.encryptedData, CMS_EncryptedData, 0)),
333        ADB_ENTRY(NID_id_smime_ct_authData, ASN1_NDEF_EXP(CMS_ContentInfo, d.authenticatedData, CMS_AuthenticatedData, 0)),
334        ADB_ENTRY(NID_id_smime_ct_compressedData, ASN1_NDEF_EXP(CMS_ContentInfo, d.compressedData, CMS_CompressedData, 0)),
335} ASN1_ADB_END(CMS_ContentInfo, 0, contentType, 0, &cms_default_tt, NULL);
336
337/* CMS streaming support */
338static int cms_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
339                  void *exarg)
340{
341    ASN1_STREAM_ARG *sarg = exarg;
342    CMS_ContentInfo *cms = NULL;
343    if (pval)
344        cms = (CMS_ContentInfo *)*pval;
345    else
346        return 1;
347    switch (operation) {
348
349    case ASN1_OP_STREAM_PRE:
350        if (CMS_stream(&sarg->boundary, cms) <= 0)
351            return 0;
352    case ASN1_OP_DETACHED_PRE:
353        sarg->ndef_bio = CMS_dataInit(cms, sarg->out);
354        if (!sarg->ndef_bio)
355            return 0;
356        break;
357
358    case ASN1_OP_STREAM_POST:
359    case ASN1_OP_DETACHED_POST:
360        if (CMS_dataFinal(cms, sarg->ndef_bio) <= 0)
361            return 0;
362        break;
363
364    }
365    return 1;
366}
367
368ASN1_NDEF_SEQUENCE_cb(CMS_ContentInfo, cms_cb) = {
369        ASN1_SIMPLE(CMS_ContentInfo, contentType, ASN1_OBJECT),
370        ASN1_ADB_OBJECT(CMS_ContentInfo)
371} ASN1_NDEF_SEQUENCE_END_cb(CMS_ContentInfo, CMS_ContentInfo)
372
373/* Specials for signed attributes */
374
375/*
376 * When signing attributes we want to reorder them to match the sorted
377 * encoding.
378 */
379
380ASN1_ITEM_TEMPLATE(CMS_Attributes_Sign) =
381        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, CMS_ATTRIBUTES, X509_ATTRIBUTE)
382ASN1_ITEM_TEMPLATE_END(CMS_Attributes_Sign)
383
384/*
385 * When verifying attributes we need to use the received order. So we use
386 * SEQUENCE OF and tag it to SET OF
387 */
388
389ASN1_ITEM_TEMPLATE(CMS_Attributes_Verify) =
390        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
391                                V_ASN1_SET, CMS_ATTRIBUTES, X509_ATTRIBUTE)
392ASN1_ITEM_TEMPLATE_END(CMS_Attributes_Verify)
393
394
395
396ASN1_CHOICE(CMS_ReceiptsFrom) = {
397  ASN1_IMP(CMS_ReceiptsFrom, d.allOrFirstTier, LONG, 0),
398  ASN1_IMP_SEQUENCE_OF(CMS_ReceiptsFrom, d.receiptList, GENERAL_NAMES, 1)
399} ASN1_CHOICE_END(CMS_ReceiptsFrom)
400
401ASN1_SEQUENCE(CMS_ReceiptRequest) = {
402  ASN1_SIMPLE(CMS_ReceiptRequest, signedContentIdentifier, ASN1_OCTET_STRING),
403  ASN1_SIMPLE(CMS_ReceiptRequest, receiptsFrom, CMS_ReceiptsFrom),
404  ASN1_SEQUENCE_OF(CMS_ReceiptRequest, receiptsTo, GENERAL_NAMES)
405} ASN1_SEQUENCE_END(CMS_ReceiptRequest)
406
407ASN1_SEQUENCE(CMS_Receipt) = {
408  ASN1_SIMPLE(CMS_Receipt, version, LONG),
409  ASN1_SIMPLE(CMS_Receipt, contentType, ASN1_OBJECT),
410  ASN1_SIMPLE(CMS_Receipt, signedContentIdentifier, ASN1_OCTET_STRING),
411  ASN1_SIMPLE(CMS_Receipt, originatorSignatureValue, ASN1_OCTET_STRING)
412} ASN1_SEQUENCE_END(CMS_Receipt)
413
414/*
415 * Utilities to encode the CMS_SharedInfo structure used during key
416 * derivation.
417 */
418
419typedef struct {
420    X509_ALGOR *keyInfo;
421    ASN1_OCTET_STRING *entityUInfo;
422    ASN1_OCTET_STRING *suppPubInfo;
423} CMS_SharedInfo;
424
425ASN1_SEQUENCE(CMS_SharedInfo) = {
426  ASN1_SIMPLE(CMS_SharedInfo, keyInfo, X509_ALGOR),
427  ASN1_EXP_OPT(CMS_SharedInfo, entityUInfo, ASN1_OCTET_STRING, 0),
428  ASN1_EXP_OPT(CMS_SharedInfo, suppPubInfo, ASN1_OCTET_STRING, 2),
429} ASN1_SEQUENCE_END(CMS_SharedInfo)
430
431int CMS_SharedInfo_encode(unsigned char **pder, X509_ALGOR *kekalg,
432                          ASN1_OCTET_STRING *ukm, int keylen)
433{
434    union {
435        CMS_SharedInfo *pecsi;
436        ASN1_VALUE *a;
437    } intsi = {
438        NULL
439    };
440
441    ASN1_OCTET_STRING oklen;
442    unsigned char kl[4];
443    CMS_SharedInfo ecsi;
444
445    keylen <<= 3;
446    kl[0] = (keylen >> 24) & 0xff;
447    kl[1] = (keylen >> 16) & 0xff;
448    kl[2] = (keylen >> 8) & 0xff;
449    kl[3] = keylen & 0xff;
450    oklen.length = 4;
451    oklen.data = kl;
452    oklen.type = V_ASN1_OCTET_STRING;
453    oklen.flags = 0;
454    ecsi.keyInfo = kekalg;
455    ecsi.entityUInfo = ukm;
456    ecsi.suppPubInfo = &oklen;
457    intsi.pecsi = &ecsi;
458    return ASN1_item_i2d(intsi.a, pder, ASN1_ITEM_rptr(CMS_SharedInfo));
459}
460