pk7_asn1.c revision 296465 
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
81ASN1_NDEF_SEQUENCE(PKCS7) = {
82        ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT),
83        ASN1_ADB_OBJECT(PKCS7)
84}ASN1_NDEF_SEQUENCE_END(PKCS7)
85
86IMPLEMENT_ASN1_FUNCTIONS(PKCS7)
87IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7)
88IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7)
89
90ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = {
91        ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),
92        ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),
93        ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),
94        ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),
95        ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),
96        ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)
97} ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED)
98
99IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)
100
101/* Minor tweak to operation: free up EVP_PKEY */
102static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
103{
104    if (operation == ASN1_OP_FREE_POST) {
105        PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;
106        EVP_PKEY_free(si->pkey);
107    }
108    return 1;
109}
110
111ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {
112        ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),
113        ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
114        ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),
115        /* NB this should be a SET OF but we use a SEQUENCE OF so the
116         * original order * is retained when the structure is reencoded.
117         * Since the attributes are implicitly tagged this will not affect
118         * the encoding.
119         */
120        ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),
121        ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),
122        ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),
123        ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)
124} ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO)
125
126IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)
127
128ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {
129        ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),
130        ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)
131} ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL)
132
133IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)
134
135ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = {
136        ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),
137        ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
138        ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)
139} ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE)
140
141IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)
142
143/* Minor tweak to operation: free up X509 */
144static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
145{
146    if (operation == ASN1_OP_FREE_POST) {
147        PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;
148        X509_free(ri->cert);
149    }
150    return 1;
151}
152
153ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {
154        ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),
155        ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
156        ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),
157        ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)
158} ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO)
159
160IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)
161
162ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = {
163        ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),
164        ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),
165        ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING, 0)
166} ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT)
167
168IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)
169
170ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {
171        ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),
172        ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
173        ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),
174        ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),
175        ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),
176        ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),
177        ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)
178} ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE)
179
180IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)
181
182ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = {
183        ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),
184        ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)
185} ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT)
186
187IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)
188
189ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = {
190        ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),
191        ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),
192        ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),
193        ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)
194} ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST)
195
196IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)
197
198/* Specials for authenticated attributes */
199
200/*
201 * When signing attributes we want to reorder them to match the sorted
202 * encoding.
203 */
204
205ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) =
206        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
207ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN)
208
209/*
210 * When verifying attributes we need to use the received order. So we use
211 * SEQUENCE OF and tag it to SET OF
212 */
213
214ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) =
215        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
216                                V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
217ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY)
218