x_req.c revision 296465 
1/* crypto/asn1/x_req.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/asn1t.h>
62#include <openssl/x509.h>
63
64/*-
65 * X509_REQ_INFO is handled in an unusual way to get round
66 * invalid encodings. Some broken certificate requests don't
67 * encode the attributes field if it is empty. This is in
68 * violation of PKCS#10 but we need to tolerate it. We do
69 * this by making the attributes field OPTIONAL then using
70 * the callback to initialise it to an empty STACK.
71 *
72 * This means that the field will be correctly encoded unless
73 * we NULL out the field.
74 *
75 * As a result we no longer need the req_kludge field because
76 * the information is now contained in the attributes field:
77 * 1. If it is NULL then it's the invalid omission.
78 * 2. If it is empty it is the correct encoding.
79 * 3. If it is not empty then some attributes are present.
80 *
81 */
82
83static int rinf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
84{
85    X509_REQ_INFO *rinf = (X509_REQ_INFO *)*pval;
86
87    if (operation == ASN1_OP_NEW_POST) {
88        rinf->attributes = sk_X509_ATTRIBUTE_new_null();
89        if (!rinf->attributes)
90            return 0;
91    }
92    return 1;
93}
94
95ASN1_SEQUENCE_enc(X509_REQ_INFO, enc, rinf_cb) = {
96        ASN1_SIMPLE(X509_REQ_INFO, version, ASN1_INTEGER),
97        ASN1_SIMPLE(X509_REQ_INFO, subject, X509_NAME),
98        ASN1_SIMPLE(X509_REQ_INFO, pubkey, X509_PUBKEY),
99        /* This isn't really OPTIONAL but it gets round invalid
100         * encodings
101         */
102        ASN1_IMP_SET_OF_OPT(X509_REQ_INFO, attributes, X509_ATTRIBUTE, 0)
103} ASN1_SEQUENCE_END_enc(X509_REQ_INFO, X509_REQ_INFO)
104
105IMPLEMENT_ASN1_FUNCTIONS(X509_REQ_INFO)
106
107ASN1_SEQUENCE_ref(X509_REQ, 0, CRYPTO_LOCK_X509_REQ) = {
108        ASN1_SIMPLE(X509_REQ, req_info, X509_REQ_INFO),
109        ASN1_SIMPLE(X509_REQ, sig_alg, X509_ALGOR),
110        ASN1_SIMPLE(X509_REQ, signature, ASN1_BIT_STRING)
111} ASN1_SEQUENCE_END_ref(X509_REQ, X509_REQ)
112
113IMPLEMENT_ASN1_FUNCTIONS(X509_REQ)
114
115IMPLEMENT_ASN1_DUP_FUNCTION(X509_REQ)
116