commit a6efbe123af3d98b4d10d4fcdfe68dc5303212f8
[openssl.git] / crypto / cms / cms_asn1.c
1 /*
2  * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the Apache License 2.0 (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
17 ASN1_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
22 ASN1_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
27 ASN1_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
35 ASN1_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
40 ASN1_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 */
46 static 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
58 ASN1_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
68 ASN1_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
73 ASN1_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
78 ASN1_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
87 ASN1_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
92 ASN1_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
98 ASN1_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
105 ASN1_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
110 ASN1_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
116 ASN1_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
121 static 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
131 ASN1_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
136 ASN1_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
141 ASN1_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
147 static 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
164 ASN1_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
172 ASN1_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
178 ASN1_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
185 ASN1_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
192 ASN1_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 */
198 static 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
219 ASN1_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
227 ASN1_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
235 ASN1_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
242 ASN1_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
248 ASN1_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
260 ASN1_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
268 ASN1_ADB_TEMPLATE(cms_default) = ASN1_EXP(CMS_ContentInfo, d.other, ASN1_ANY, 0);
269
270 ASN1_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 */
281 static 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
312 ASN1_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
324 ASN1_ITEM_TEMPLATE(CMS_Attributes_Sign) =
325         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, CMS_ATTRIBUTES, X509_ATTRIBUTE)
326 ASN1_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
333 ASN1_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)
336 ASN1_ITEM_TEMPLATE_END(CMS_Attributes_Verify)
337
338
339
340 ASN1_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
345 ASN1_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
351 ASN1_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
363 typedef struct {
364     X509_ALGOR *keyInfo;
365     ASN1_OCTET_STRING *entityUInfo;
366     ASN1_OCTET_STRING *suppPubInfo;
367 } CMS_SharedInfo;
368
369 ASN1_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
375 int 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 }