pk7_asn1.c revision 280304 
1/* pk7_asn.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 2000.
5 */
6/* ====================================================================
7 * Copyright (c) 2000 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 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <stdio.h>
61#include "cryptlib.h"
62#include <openssl/asn1t.h>
63#include <openssl/pkcs7.h>
64#include <openssl/x509.h>
65
66/* PKCS#7 ASN1 module */
67
68/* This is the ANY DEFINED BY table for the top level PKCS#7 structure */
69
70ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0);
71
72ASN1_ADB(PKCS7) = {
73        ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING_NDEF, 0)),
74        ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)),
75        ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)),
76        ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)),
77        ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)),
78        ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0))
79} ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL);
80
81/* PKCS#7 streaming support */
82static int pk7_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
83                  void *exarg)
84{
85    ASN1_STREAM_ARG *sarg = exarg;
86    PKCS7 **pp7 = (PKCS7 **)pval;
87
88    switch (operation) {
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)
115
116IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7)
117
118IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7)
119
120ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = {
121        ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),
122        ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),
123        ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),
124        ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),
125        ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),
126        ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)
127} ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED)
128
129IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)
130
131/* Minor tweak to operation: free up EVP_PKEY */
132static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
133                 void *exarg)
134{
135    if (operation == ASN1_OP_FREE_POST) {
136        PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;
137        EVP_PKEY_free(si->pkey);
138    }
139    return 1;
140}
141
142ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {
143        ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),
144        ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
145        ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),
146        /* NB this should be a SET OF but we use a SEQUENCE OF so the
147         * original order * is retained when the structure is reencoded.
148         * Since the attributes are implicitly tagged this will not affect
149         * the encoding.
150         */
151        ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),
152        ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),
153        ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),
154        ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)
155} ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO)
156
157IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)
158
159ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {
160        ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),
161        ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)
162} ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL)
163
164IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)
165
166ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = {
167        ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),
168        ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
169        ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)
170} ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE)
171
172IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)
173
174/* Minor tweak to operation: free up X509 */
175static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
176                 void *exarg)
177{
178    if (operation == ASN1_OP_FREE_POST) {
179        PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;
180        X509_free(ri->cert);
181    }
182    return 1;
183}
184
185ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {
186        ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),
187        ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
188        ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),
189        ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)
190} ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO)
191
192IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)
193
194ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = {
195        ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),
196        ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),
197        ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING_NDEF, 0)
198} ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT)
199
200IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)
201
202ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {
203        ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),
204        ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
205        ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),
206        ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),
207        ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),
208        ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),
209        ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)
210} ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE)
211
212IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)
213
214ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = {
215        ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),
216        ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)
217} ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT)
218
219IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)
220
221ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = {
222        ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),
223        ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),
224        ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),
225        ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)
226} ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST)
227
228IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)
229
230/* Specials for authenticated attributes */
231
232/*
233 * When signing attributes we want to reorder them to match the sorted
234 * encoding.
235 */
236
237ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) =
238        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
239ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN)
240
241/*
242 * When verifying attributes we need to use the received order. So we use
243 * SEQUENCE OF and tag it to SET OF
244 */
245
246ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) =
247        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
248                                V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
249ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY)
250
251IMPLEMENT_ASN1_PRINT_FUNCTION(PKCS7)
252