1/* pk7_asn.c */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 2000 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 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com).  This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/asn1t.h>
62#include <openssl/pkcs7.h>
63#include <openssl/x509.h>
64
65/* PKCS#7 ASN1 module */
66
67/* This is the ANY DEFINED BY table for the top level PKCS#7 structure */
68
69ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0);
70
71ASN1_ADB(PKCS7) = {
72	ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING_NDEF, 0)),
73	ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)),
74	ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)),
75	ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)),
76	ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)),
77	ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0))
78} ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL);
79
80/* PKCS#7 streaming support */
81static int pk7_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
82							void *exarg)
83{
84	ASN1_STREAM_ARG *sarg = exarg;
85	PKCS7 **pp7 = (PKCS7 **)pval;
86
87	switch(operation)
88		{
89
90		case ASN1_OP_STREAM_PRE:
91		if (PKCS7_stream(&sarg->boundary, *pp7) <= 0)
92			return 0;
93		case ASN1_OP_DETACHED_PRE:
94		sarg->ndef_bio = PKCS7_dataInit(*pp7, sarg->out);
95		if (!sarg->ndef_bio)
96			return 0;
97		break;
98
99		case ASN1_OP_STREAM_POST:
100		case ASN1_OP_DETACHED_POST:
101		if (PKCS7_dataFinal(*pp7, sarg->ndef_bio) <= 0)
102			return 0;
103		break;
104
105		}
106	return 1;
107}
108
109ASN1_NDEF_SEQUENCE_cb(PKCS7, pk7_cb) = {
110	ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT),
111	ASN1_ADB_OBJECT(PKCS7)
112}ASN1_NDEF_SEQUENCE_END_cb(PKCS7, PKCS7)
113
114IMPLEMENT_ASN1_FUNCTIONS(PKCS7)
115IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7)
116IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7)
117
118ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = {
119	ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),
120	ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),
121	ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),
122	ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),
123	ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),
124	ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)
125} ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED)
126
127IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)
128
129/* Minor tweak to operation: free up EVP_PKEY */
130static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
131							void *exarg)
132{
133	if(operation == ASN1_OP_FREE_POST) {
134		PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;
135		EVP_PKEY_free(si->pkey);
136	}
137	return 1;
138}
139
140ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {
141	ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),
142	ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
143	ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),
144	/* NB this should be a SET OF but we use a SEQUENCE OF so the
145	 * original order * is retained when the structure is reencoded.
146	 * Since the attributes are implicitly tagged this will not affect
147	 * the encoding.
148	 */
149	ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),
150	ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),
151	ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),
152	ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)
153} ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO)
154
155IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)
156
157ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {
158	ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),
159	ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)
160} ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL)
161
162IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)
163
164ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = {
165	ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),
166	ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
167	ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)
168} ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE)
169
170IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)
171
172/* Minor tweak to operation: free up X509 */
173static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
174								void *exarg)
175{
176	if(operation == ASN1_OP_FREE_POST) {
177		PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;
178		X509_free(ri->cert);
179	}
180	return 1;
181}
182
183ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {
184	ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),
185	ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
186	ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),
187	ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)
188} ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO)
189
190IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)
191
192ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = {
193	ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),
194	ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),
195	ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING_NDEF, 0)
196} ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT)
197
198IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)
199
200ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {
201	ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),
202	ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
203	ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),
204	ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),
205	ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),
206	ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),
207	ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)
208} ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE)
209
210IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)
211
212ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = {
213	ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),
214	ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)
215} ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT)
216
217IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)
218
219ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = {
220	ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),
221	ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),
222	ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),
223	ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)
224} ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST)
225
226IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)
227
228/* Specials for authenticated attributes */
229
230/* When signing attributes we want to reorder them to match the sorted
231 * encoding.
232 */
233
234ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) =
235	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
236ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN)
237
238/* When verifying attributes we need to use the received order. So
239 * we use SEQUENCE OF and tag it to SET OF
240 */
241
242ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) =
243	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
244				V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
245ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY)
246
247IMPLEMENT_ASN1_PRINT_FUNCTION(PKCS7)
248