1/*
2 * Copyright 2000-2016 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 <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/asn1t.h>
13#include <openssl/pkcs7.h>
14#include <openssl/x509.h>
15
16/* PKCS#7 ASN1 module */
17
18/* This is the ANY DEFINED BY table for the top level PKCS#7 structure */
19
20ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0);
21
22ASN1_ADB(PKCS7) = {
23 ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING_NDEF, 0)),
24 ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)),
25 ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)),
26 ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)),
27 ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)),
28 ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0))
29} ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL);
30
31/* PKCS#7 streaming support */
32static int pk7_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
33 void *exarg)
34{
35 ASN1_STREAM_ARG *sarg = exarg;
36 PKCS7 **pp7 = (PKCS7 **)pval;
37
38 switch (operation) {
39
40 case ASN1_OP_STREAM_PRE:
41 if (PKCS7_stream(&sarg->boundary, *pp7) <= 0)
42 return 0;
43 /* fall thru */
44 case ASN1_OP_DETACHED_PRE:
45 sarg->ndef_bio = PKCS7_dataInit(*pp7, sarg->out);
46 if (!sarg->ndef_bio)
47 return 0;
48 break;
49
50 case ASN1_OP_STREAM_POST:
51 case ASN1_OP_DETACHED_POST:
52 if (PKCS7_dataFinal(*pp7, sarg->ndef_bio) <= 0)
53 return 0;
54 break;
55
56 }
57 return 1;
58}
59
60ASN1_NDEF_SEQUENCE_cb(PKCS7, pk7_cb) = {
61 ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT),
62 ASN1_ADB_OBJECT(PKCS7)
63}ASN1_NDEF_SEQUENCE_END_cb(PKCS7, PKCS7)
64
65IMPLEMENT_ASN1_FUNCTIONS(PKCS7)
66
67IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7)
68
69IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7)
70
71ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = {
72 ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),
73 ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),
74 ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),
75 ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),
76 ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),
77 ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)
78} ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED)
79
80IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)
81
82/* Minor tweak to operation: free up EVP_PKEY */
83static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
84 void *exarg)
85{
86 if (operation == ASN1_OP_FREE_POST) {
87 PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;
88 EVP_PKEY_free(si->pkey);
89 }
90 return 1;
91}
92
93ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {
94 ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),
95 ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
96 ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),
97 /* NB this should be a SET OF but we use a SEQUENCE OF so the
98 * original order * is retained when the structure is reencoded.
99 * Since the attributes are implicitly tagged this will not affect
100 * the encoding.
101 */
102 ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),
103 ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),
104 ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),
105 ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)
106} ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO)
107
108IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)
109
110ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {
111 ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),
112 ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)
113} ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL)
114
115IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)
116
117ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = {
118 ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),
119 ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
120 ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)
121} ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE)
122
123IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)
124
125/* Minor tweak to operation: free up X509 */
126static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
127 void *exarg)
128{
129 if (operation == ASN1_OP_FREE_POST) {
130 PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;
131 X509_free(ri->cert);
132 }
133 return 1;
134}
135
136ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {
137 ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),
138 ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
139 ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),
140 ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)
141} ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO)
142
143IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)
144
145ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = {
146 ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),
147 ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),
148 ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING_NDEF, 0)
149} ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT)
150
151IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)
152
153ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {
154 ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),
155 ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
156 ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),
157 ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),
158 ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),
159 ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),
160 ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)
161} ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE)
162
163IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)
164
165ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = {
166 ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),
167 ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)
168} ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT)
169
170IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)
171
172ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = {
173 ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),
174 ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),
175 ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),
176 ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)
177} ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST)
178
179IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)
180
181/* Specials for authenticated attributes */
182
183/*
184 * When signing attributes we want to reorder them to match the sorted
185 * encoding.
186 */
187
188ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) =
189 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
190ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN)
191
192/*
193 * When verifying attributes we need to use the received order. So we use
194 * SEQUENCE OF and tag it to SET OF
195 */
196
197ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) =
198 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
199 V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
200ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY)
201
202IMPLEMENT_ASN1_PRINT_FUNCTION(PKCS7)
203