1/*
2 * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <openssl/asn1t.h>
11#include <openssl/pem.h>
12#include <openssl/x509v3.h>
13#include <openssl/cms.h>
14#include "cms_local.h"
15
16
17ASN1_SEQUENCE(CMS_IssuerAndSerialNumber) = {
18        ASN1_SIMPLE(CMS_IssuerAndSerialNumber, issuer, X509_NAME),
19        ASN1_SIMPLE(CMS_IssuerAndSerialNumber, serialNumber, ASN1_INTEGER)
20} ASN1_SEQUENCE_END(CMS_IssuerAndSerialNumber)
21
22ASN1_SEQUENCE(CMS_OtherCertificateFormat) = {
23        ASN1_SIMPLE(CMS_OtherCertificateFormat, otherCertFormat, ASN1_OBJECT),
24        ASN1_OPT(CMS_OtherCertificateFormat, otherCert, ASN1_ANY)
25} static_ASN1_SEQUENCE_END(CMS_OtherCertificateFormat)
26
27ASN1_CHOICE(CMS_CertificateChoices) = {
28        ASN1_SIMPLE(CMS_CertificateChoices, d.certificate, X509),
29        ASN1_IMP(CMS_CertificateChoices, d.extendedCertificate, ASN1_SEQUENCE, 0),
30        ASN1_IMP(CMS_CertificateChoices, d.v1AttrCert, ASN1_SEQUENCE, 1),
31        ASN1_IMP(CMS_CertificateChoices, d.v2AttrCert, ASN1_SEQUENCE, 2),
32        ASN1_IMP(CMS_CertificateChoices, d.other, CMS_OtherCertificateFormat, 3)
33} ASN1_CHOICE_END(CMS_CertificateChoices)
34
35ASN1_CHOICE(CMS_SignerIdentifier) = {
36        ASN1_SIMPLE(CMS_SignerIdentifier, d.issuerAndSerialNumber, CMS_IssuerAndSerialNumber),
37        ASN1_IMP(CMS_SignerIdentifier, d.subjectKeyIdentifier, ASN1_OCTET_STRING, 0)
38} static_ASN1_CHOICE_END(CMS_SignerIdentifier)
39
40ASN1_NDEF_SEQUENCE(CMS_EncapsulatedContentInfo) = {
41        ASN1_SIMPLE(CMS_EncapsulatedContentInfo, eContentType, ASN1_OBJECT),
42        ASN1_NDEF_EXP_OPT(CMS_EncapsulatedContentInfo, eContent, ASN1_OCTET_STRING_NDEF, 0)
43} static_ASN1_NDEF_SEQUENCE_END(CMS_EncapsulatedContentInfo)
44
45/* Minor tweak to operation: free up signer key, cert */
46static int cms_si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
47                     void *exarg)
48{
49    if (operation == ASN1_OP_FREE_POST) {
50        CMS_SignerInfo *si = (CMS_SignerInfo *)*pval;
51        EVP_PKEY_free(si->pkey);
52        X509_free(si->signer);
53        EVP_MD_CTX_free(si->mctx);
54    }
55    return 1;
56}
57
58ASN1_SEQUENCE_cb(CMS_SignerInfo, cms_si_cb) = {
59        ASN1_EMBED(CMS_SignerInfo, version, INT32),
60        ASN1_SIMPLE(CMS_SignerInfo, sid, CMS_SignerIdentifier),
61        ASN1_SIMPLE(CMS_SignerInfo, digestAlgorithm, X509_ALGOR),
62        ASN1_IMP_SET_OF_OPT(CMS_SignerInfo, signedAttrs, X509_ATTRIBUTE, 0),
63        ASN1_SIMPLE(CMS_SignerInfo, signatureAlgorithm, X509_ALGOR),
64        ASN1_SIMPLE(CMS_SignerInfo, signature, ASN1_OCTET_STRING),
65        ASN1_IMP_SET_OF_OPT(CMS_SignerInfo, unsignedAttrs, X509_ATTRIBUTE, 1)
66} ASN1_SEQUENCE_END_cb(CMS_SignerInfo, CMS_SignerInfo)
67
68ASN1_SEQUENCE(CMS_OtherRevocationInfoFormat) = {
69        ASN1_SIMPLE(CMS_OtherRevocationInfoFormat, otherRevInfoFormat, ASN1_OBJECT),
70        ASN1_OPT(CMS_OtherRevocationInfoFormat, otherRevInfo, ASN1_ANY)
71} static_ASN1_SEQUENCE_END(CMS_OtherRevocationInfoFormat)
72
73ASN1_CHOICE(CMS_RevocationInfoChoice) = {
74        ASN1_SIMPLE(CMS_RevocationInfoChoice, d.crl, X509_CRL),
75        ASN1_IMP(CMS_RevocationInfoChoice, d.other, CMS_OtherRevocationInfoFormat, 1)
76} ASN1_CHOICE_END(CMS_RevocationInfoChoice)
77
78ASN1_NDEF_SEQUENCE(CMS_SignedData) = {
79        ASN1_EMBED(CMS_SignedData, version, INT32),
80        ASN1_SET_OF(CMS_SignedData, digestAlgorithms, X509_ALGOR),
81        ASN1_SIMPLE(CMS_SignedData, encapContentInfo, CMS_EncapsulatedContentInfo),
82        ASN1_IMP_SET_OF_OPT(CMS_SignedData, certificates, CMS_CertificateChoices, 0),
83        ASN1_IMP_SET_OF_OPT(CMS_SignedData, crls, CMS_RevocationInfoChoice, 1),
84        ASN1_SET_OF(CMS_SignedData, signerInfos, CMS_SignerInfo)
85} ASN1_NDEF_SEQUENCE_END(CMS_SignedData)
86
87ASN1_SEQUENCE(CMS_OriginatorInfo) = {
88        ASN1_IMP_SET_OF_OPT(CMS_OriginatorInfo, certificates, CMS_CertificateChoices, 0),
89        ASN1_IMP_SET_OF_OPT(CMS_OriginatorInfo, crls, CMS_RevocationInfoChoice, 1)
90} static_ASN1_SEQUENCE_END(CMS_OriginatorInfo)
91
92ASN1_NDEF_SEQUENCE(CMS_EncryptedContentInfo) = {
93        ASN1_SIMPLE(CMS_EncryptedContentInfo, contentType, ASN1_OBJECT),
94        ASN1_SIMPLE(CMS_EncryptedContentInfo, contentEncryptionAlgorithm, X509_ALGOR),
95        ASN1_IMP_OPT(CMS_EncryptedContentInfo, encryptedContent, ASN1_OCTET_STRING_NDEF, 0)
96} static_ASN1_NDEF_SEQUENCE_END(CMS_EncryptedContentInfo)
97
98ASN1_SEQUENCE(CMS_KeyTransRecipientInfo) = {
99        ASN1_EMBED(CMS_KeyTransRecipientInfo, version, INT32),
100        ASN1_SIMPLE(CMS_KeyTransRecipientInfo, rid, CMS_SignerIdentifier),
101        ASN1_SIMPLE(CMS_KeyTransRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR),
102        ASN1_SIMPLE(CMS_KeyTransRecipientInfo, encryptedKey, ASN1_OCTET_STRING)
103} ASN1_SEQUENCE_END(CMS_KeyTransRecipientInfo)
104
105ASN1_SEQUENCE(CMS_OtherKeyAttribute) = {
106        ASN1_SIMPLE(CMS_OtherKeyAttribute, keyAttrId, ASN1_OBJECT),
107        ASN1_OPT(CMS_OtherKeyAttribute, keyAttr, ASN1_ANY)
108} ASN1_SEQUENCE_END(CMS_OtherKeyAttribute)
109
110ASN1_SEQUENCE(CMS_RecipientKeyIdentifier) = {
111        ASN1_SIMPLE(CMS_RecipientKeyIdentifier, subjectKeyIdentifier, ASN1_OCTET_STRING),
112        ASN1_OPT(CMS_RecipientKeyIdentifier, date, ASN1_GENERALIZEDTIME),
113        ASN1_OPT(CMS_RecipientKeyIdentifier, other, CMS_OtherKeyAttribute)
114} ASN1_SEQUENCE_END(CMS_RecipientKeyIdentifier)
115
116ASN1_CHOICE(CMS_KeyAgreeRecipientIdentifier) = {
117  ASN1_SIMPLE(CMS_KeyAgreeRecipientIdentifier, d.issuerAndSerialNumber, CMS_IssuerAndSerialNumber),
118  ASN1_IMP(CMS_KeyAgreeRecipientIdentifier, d.rKeyId, CMS_RecipientKeyIdentifier, 0)
119} static_ASN1_CHOICE_END(CMS_KeyAgreeRecipientIdentifier)
120
121static int cms_rek_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
122                      void *exarg)
123{
124    CMS_RecipientEncryptedKey *rek = (CMS_RecipientEncryptedKey *)*pval;
125    if (operation == ASN1_OP_FREE_POST) {
126        EVP_PKEY_free(rek->pkey);
127    }
128    return 1;
129}
130
131ASN1_SEQUENCE_cb(CMS_RecipientEncryptedKey, cms_rek_cb) = {
132        ASN1_SIMPLE(CMS_RecipientEncryptedKey, rid, CMS_KeyAgreeRecipientIdentifier),
133        ASN1_SIMPLE(CMS_RecipientEncryptedKey, encryptedKey, ASN1_OCTET_STRING)
134} ASN1_SEQUENCE_END_cb(CMS_RecipientEncryptedKey, CMS_RecipientEncryptedKey)
135
136ASN1_SEQUENCE(CMS_OriginatorPublicKey) = {
137  ASN1_SIMPLE(CMS_OriginatorPublicKey, algorithm, X509_ALGOR),
138  ASN1_SIMPLE(CMS_OriginatorPublicKey, publicKey, ASN1_BIT_STRING)
139} ASN1_SEQUENCE_END(CMS_OriginatorPublicKey)
140
141ASN1_CHOICE(CMS_OriginatorIdentifierOrKey) = {
142  ASN1_SIMPLE(CMS_OriginatorIdentifierOrKey, d.issuerAndSerialNumber, CMS_IssuerAndSerialNumber),
143  ASN1_IMP(CMS_OriginatorIdentifierOrKey, d.subjectKeyIdentifier, ASN1_OCTET_STRING, 0),
144  ASN1_IMP(CMS_OriginatorIdentifierOrKey, d.originatorKey, CMS_OriginatorPublicKey, 1)
145} static_ASN1_CHOICE_END(CMS_OriginatorIdentifierOrKey)
146
147static int cms_kari_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
148                       void *exarg)
149{
150    CMS_KeyAgreeRecipientInfo *kari = (CMS_KeyAgreeRecipientInfo *)*pval;
151    if (operation == ASN1_OP_NEW_POST) {
152        kari->ctx = EVP_CIPHER_CTX_new();
153        if (kari->ctx == NULL)
154            return 0;
155        EVP_CIPHER_CTX_set_flags(kari->ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW);
156        kari->pctx = NULL;
157    } else if (operation == ASN1_OP_FREE_POST) {
158        EVP_PKEY_CTX_free(kari->pctx);
159        EVP_CIPHER_CTX_free(kari->ctx);
160    }
161    return 1;
162}
163
164ASN1_SEQUENCE_cb(CMS_KeyAgreeRecipientInfo, cms_kari_cb) = {
165        ASN1_EMBED(CMS_KeyAgreeRecipientInfo, version, INT32),
166        ASN1_EXP(CMS_KeyAgreeRecipientInfo, originator, CMS_OriginatorIdentifierOrKey, 0),
167        ASN1_EXP_OPT(CMS_KeyAgreeRecipientInfo, ukm, ASN1_OCTET_STRING, 1),
168        ASN1_SIMPLE(CMS_KeyAgreeRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR),
169        ASN1_SEQUENCE_OF(CMS_KeyAgreeRecipientInfo, recipientEncryptedKeys, CMS_RecipientEncryptedKey)
170} ASN1_SEQUENCE_END_cb(CMS_KeyAgreeRecipientInfo, CMS_KeyAgreeRecipientInfo)
171
172ASN1_SEQUENCE(CMS_KEKIdentifier) = {
173        ASN1_SIMPLE(CMS_KEKIdentifier, keyIdentifier, ASN1_OCTET_STRING),
174        ASN1_OPT(CMS_KEKIdentifier, date, ASN1_GENERALIZEDTIME),
175        ASN1_OPT(CMS_KEKIdentifier, other, CMS_OtherKeyAttribute)
176} static_ASN1_SEQUENCE_END(CMS_KEKIdentifier)
177
178ASN1_SEQUENCE(CMS_KEKRecipientInfo) = {
179        ASN1_EMBED(CMS_KEKRecipientInfo, version, INT32),
180        ASN1_SIMPLE(CMS_KEKRecipientInfo, kekid, CMS_KEKIdentifier),
181        ASN1_SIMPLE(CMS_KEKRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR),
182        ASN1_SIMPLE(CMS_KEKRecipientInfo, encryptedKey, ASN1_OCTET_STRING)
183} ASN1_SEQUENCE_END(CMS_KEKRecipientInfo)
184
185ASN1_SEQUENCE(CMS_PasswordRecipientInfo) = {
186        ASN1_EMBED(CMS_PasswordRecipientInfo, version, INT32),
187        ASN1_IMP_OPT(CMS_PasswordRecipientInfo, keyDerivationAlgorithm, X509_ALGOR, 0),
188        ASN1_SIMPLE(CMS_PasswordRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR),
189        ASN1_SIMPLE(CMS_PasswordRecipientInfo, encryptedKey, ASN1_OCTET_STRING)
190} ASN1_SEQUENCE_END(CMS_PasswordRecipientInfo)
191
192ASN1_SEQUENCE(CMS_OtherRecipientInfo) = {
193  ASN1_SIMPLE(CMS_OtherRecipientInfo, oriType, ASN1_OBJECT),
194  ASN1_OPT(CMS_OtherRecipientInfo, oriValue, ASN1_ANY)
195} static_ASN1_SEQUENCE_END(CMS_OtherRecipientInfo)
196
197/* Free up RecipientInfo additional data */
198static int cms_ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
199                     void *exarg)
200{
201    if (operation == ASN1_OP_FREE_PRE) {
202        CMS_RecipientInfo *ri = (CMS_RecipientInfo *)*pval;
203        if (ri->type == CMS_RECIPINFO_TRANS) {
204            CMS_KeyTransRecipientInfo *ktri = ri->d.ktri;
205            EVP_PKEY_free(ktri->pkey);
206            X509_free(ktri->recip);
207            EVP_PKEY_CTX_free(ktri->pctx);
208        } else if (ri->type == CMS_RECIPINFO_KEK) {
209            CMS_KEKRecipientInfo *kekri = ri->d.kekri;
210            OPENSSL_clear_free(kekri->key, kekri->keylen);
211        } else if (ri->type == CMS_RECIPINFO_PASS) {
212            CMS_PasswordRecipientInfo *pwri = ri->d.pwri;
213            OPENSSL_clear_free(pwri->pass, pwri->passlen);
214        }
215    }
216    return 1;
217}
218
219ASN1_CHOICE_cb(CMS_RecipientInfo, cms_ri_cb) = {
220        ASN1_SIMPLE(CMS_RecipientInfo, d.ktri, CMS_KeyTransRecipientInfo),
221        ASN1_IMP(CMS_RecipientInfo, d.kari, CMS_KeyAgreeRecipientInfo, 1),
222        ASN1_IMP(CMS_RecipientInfo, d.kekri, CMS_KEKRecipientInfo, 2),
223        ASN1_IMP(CMS_RecipientInfo, d.pwri, CMS_PasswordRecipientInfo, 3),
224        ASN1_IMP(CMS_RecipientInfo, d.ori, CMS_OtherRecipientInfo, 4)
225} ASN1_CHOICE_END_cb(CMS_RecipientInfo, CMS_RecipientInfo, type)
226
227ASN1_NDEF_SEQUENCE(CMS_EnvelopedData) = {
228        ASN1_EMBED(CMS_EnvelopedData, version, INT32),
229        ASN1_IMP_OPT(CMS_EnvelopedData, originatorInfo, CMS_OriginatorInfo, 0),
230        ASN1_SET_OF(CMS_EnvelopedData, recipientInfos, CMS_RecipientInfo),
231        ASN1_SIMPLE(CMS_EnvelopedData, encryptedContentInfo, CMS_EncryptedContentInfo),
232        ASN1_IMP_SET_OF_OPT(CMS_EnvelopedData, unprotectedAttrs, X509_ATTRIBUTE, 1)
233} ASN1_NDEF_SEQUENCE_END(CMS_EnvelopedData)
234
235ASN1_NDEF_SEQUENCE(CMS_DigestedData) = {
236        ASN1_EMBED(CMS_DigestedData, version, INT32),
237        ASN1_SIMPLE(CMS_DigestedData, digestAlgorithm, X509_ALGOR),
238        ASN1_SIMPLE(CMS_DigestedData, encapContentInfo, CMS_EncapsulatedContentInfo),
239        ASN1_SIMPLE(CMS_DigestedData, digest, ASN1_OCTET_STRING)
240} ASN1_NDEF_SEQUENCE_END(CMS_DigestedData)
241
242ASN1_NDEF_SEQUENCE(CMS_EncryptedData) = {
243        ASN1_EMBED(CMS_EncryptedData, version, INT32),
244        ASN1_SIMPLE(CMS_EncryptedData, encryptedContentInfo, CMS_EncryptedContentInfo),
245        ASN1_IMP_SET_OF_OPT(CMS_EncryptedData, unprotectedAttrs, X509_ATTRIBUTE, 1)
246} ASN1_NDEF_SEQUENCE_END(CMS_EncryptedData)
247
248ASN1_NDEF_SEQUENCE(CMS_AuthenticatedData) = {
249        ASN1_EMBED(CMS_AuthenticatedData, version, INT32),
250        ASN1_IMP_OPT(CMS_AuthenticatedData, originatorInfo, CMS_OriginatorInfo, 0),
251        ASN1_SET_OF(CMS_AuthenticatedData, recipientInfos, CMS_RecipientInfo),
252        ASN1_SIMPLE(CMS_AuthenticatedData, macAlgorithm, X509_ALGOR),
253        ASN1_IMP(CMS_AuthenticatedData, digestAlgorithm, X509_ALGOR, 1),
254        ASN1_SIMPLE(CMS_AuthenticatedData, encapContentInfo, CMS_EncapsulatedContentInfo),
255        ASN1_IMP_SET_OF_OPT(CMS_AuthenticatedData, authAttrs, X509_ALGOR, 2),
256        ASN1_SIMPLE(CMS_AuthenticatedData, mac, ASN1_OCTET_STRING),
257        ASN1_IMP_SET_OF_OPT(CMS_AuthenticatedData, unauthAttrs, X509_ALGOR, 3)
258} static_ASN1_NDEF_SEQUENCE_END(CMS_AuthenticatedData)
259
260ASN1_NDEF_SEQUENCE(CMS_CompressedData) = {
261        ASN1_EMBED(CMS_CompressedData, version, INT32),
262        ASN1_SIMPLE(CMS_CompressedData, compressionAlgorithm, X509_ALGOR),
263        ASN1_SIMPLE(CMS_CompressedData, encapContentInfo, CMS_EncapsulatedContentInfo),
264} ASN1_NDEF_SEQUENCE_END(CMS_CompressedData)
265
266/* This is the ANY DEFINED BY table for the top level ContentInfo structure */
267
268ASN1_ADB_TEMPLATE(cms_default) = ASN1_EXP(CMS_ContentInfo, d.other, ASN1_ANY, 0);
269
270ASN1_ADB(CMS_ContentInfo) = {
271        ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP(CMS_ContentInfo, d.data, ASN1_OCTET_STRING_NDEF, 0)),
272        ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP(CMS_ContentInfo, d.signedData, CMS_SignedData, 0)),
273        ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP(CMS_ContentInfo, d.envelopedData, CMS_EnvelopedData, 0)),
274        ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP(CMS_ContentInfo, d.digestedData, CMS_DigestedData, 0)),
275        ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP(CMS_ContentInfo, d.encryptedData, CMS_EncryptedData, 0)),
276        ADB_ENTRY(NID_id_smime_ct_authData, ASN1_NDEF_EXP(CMS_ContentInfo, d.authenticatedData, CMS_AuthenticatedData, 0)),
277        ADB_ENTRY(NID_id_smime_ct_compressedData, ASN1_NDEF_EXP(CMS_ContentInfo, d.compressedData, CMS_CompressedData, 0)),
278} ASN1_ADB_END(CMS_ContentInfo, 0, contentType, 0, &cms_default_tt, NULL);
279
280/* CMS streaming support */
281static int cms_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
282                  void *exarg)
283{
284    ASN1_STREAM_ARG *sarg = exarg;
285    CMS_ContentInfo *cms = NULL;
286    if (pval)
287        cms = (CMS_ContentInfo *)*pval;
288    else
289        return 1;
290    switch (operation) {
291
292    case ASN1_OP_STREAM_PRE:
293        if (CMS_stream(&sarg->boundary, cms) <= 0)
294            return 0;
295        /* fall thru */
296    case ASN1_OP_DETACHED_PRE:
297        sarg->ndef_bio = CMS_dataInit(cms, sarg->out);
298        if (!sarg->ndef_bio)
299            return 0;
300        break;
301
302    case ASN1_OP_STREAM_POST:
303    case ASN1_OP_DETACHED_POST:
304        if (CMS_dataFinal(cms, sarg->ndef_bio) <= 0)
305            return 0;
306        break;
307
308    }
309    return 1;
310}
311
312ASN1_NDEF_SEQUENCE_cb(CMS_ContentInfo, cms_cb) = {
313        ASN1_SIMPLE(CMS_ContentInfo, contentType, ASN1_OBJECT),
314        ASN1_ADB_OBJECT(CMS_ContentInfo)
315} ASN1_NDEF_SEQUENCE_END_cb(CMS_ContentInfo, CMS_ContentInfo)
316
317/* Specials for signed attributes */
318
319/*
320 * When signing attributes we want to reorder them to match the sorted
321 * encoding.
322 */
323
324ASN1_ITEM_TEMPLATE(CMS_Attributes_Sign) =
325        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, CMS_ATTRIBUTES, X509_ATTRIBUTE)
326ASN1_ITEM_TEMPLATE_END(CMS_Attributes_Sign)
327
328/*
329 * When verifying attributes we need to use the received order. So we use
330 * SEQUENCE OF and tag it to SET OF
331 */
332
333ASN1_ITEM_TEMPLATE(CMS_Attributes_Verify) =
334        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
335                                V_ASN1_SET, CMS_ATTRIBUTES, X509_ATTRIBUTE)
336ASN1_ITEM_TEMPLATE_END(CMS_Attributes_Verify)
337
338
339
340ASN1_CHOICE(CMS_ReceiptsFrom) = {
341  ASN1_IMP_EMBED(CMS_ReceiptsFrom, d.allOrFirstTier, INT32, 0),
342  ASN1_IMP_SEQUENCE_OF(CMS_ReceiptsFrom, d.receiptList, GENERAL_NAMES, 1)
343} static_ASN1_CHOICE_END(CMS_ReceiptsFrom)
344
345ASN1_SEQUENCE(CMS_ReceiptRequest) = {
346  ASN1_SIMPLE(CMS_ReceiptRequest, signedContentIdentifier, ASN1_OCTET_STRING),
347  ASN1_SIMPLE(CMS_ReceiptRequest, receiptsFrom, CMS_ReceiptsFrom),
348  ASN1_SEQUENCE_OF(CMS_ReceiptRequest, receiptsTo, GENERAL_NAMES)
349} ASN1_SEQUENCE_END(CMS_ReceiptRequest)
350
351ASN1_SEQUENCE(CMS_Receipt) = {
352  ASN1_EMBED(CMS_Receipt, version, INT32),
353  ASN1_SIMPLE(CMS_Receipt, contentType, ASN1_OBJECT),
354  ASN1_SIMPLE(CMS_Receipt, signedContentIdentifier, ASN1_OCTET_STRING),
355  ASN1_SIMPLE(CMS_Receipt, originatorSignatureValue, ASN1_OCTET_STRING)
356} ASN1_SEQUENCE_END(CMS_Receipt)
357
358/*
359 * Utilities to encode the CMS_SharedInfo structure used during key
360 * derivation.
361 */
362
363typedef struct {
364    X509_ALGOR *keyInfo;
365    ASN1_OCTET_STRING *entityUInfo;
366    ASN1_OCTET_STRING *suppPubInfo;
367} CMS_SharedInfo;
368
369ASN1_SEQUENCE(CMS_SharedInfo) = {
370  ASN1_SIMPLE(CMS_SharedInfo, keyInfo, X509_ALGOR),
371  ASN1_EXP_OPT(CMS_SharedInfo, entityUInfo, ASN1_OCTET_STRING, 0),
372  ASN1_EXP_OPT(CMS_SharedInfo, suppPubInfo, ASN1_OCTET_STRING, 2),
373} static_ASN1_SEQUENCE_END(CMS_SharedInfo)
374
375int CMS_SharedInfo_encode(unsigned char **pder, X509_ALGOR *kekalg,
376                          ASN1_OCTET_STRING *ukm, int keylen)
377{
378    union {
379        CMS_SharedInfo *pecsi;
380        ASN1_VALUE *a;
381    } intsi = {
382        NULL
383    };
384
385    ASN1_OCTET_STRING oklen;
386    unsigned char kl[4];
387    CMS_SharedInfo ecsi;
388
389    keylen <<= 3;
390    kl[0] = (keylen >> 24) & 0xff;
391    kl[1] = (keylen >> 16) & 0xff;
392    kl[2] = (keylen >> 8) & 0xff;
393    kl[3] = keylen & 0xff;
394    oklen.length = 4;
395    oklen.data = kl;
396    oklen.type = V_ASN1_OCTET_STRING;
397    oklen.flags = 0;
398    ecsi.keyInfo = kekalg;
399    ecsi.entityUInfo = ukm;
400    ecsi.suppPubInfo = &oklen;
401    intsi.pecsi = &ecsi;
402    return ASN1_item_i2d(intsi.a, pder, ASN1_ITEM_rptr(CMS_SharedInfo));
403}
404