1/*
2 * Copyright 1995-2016 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/x509.h>
14#include "crypto/x509.h"
15
16/*-
17 * X509_REQ_INFO is handled in an unusual way to get round
18 * invalid encodings. Some broken certificate requests don't
19 * encode the attributes field if it is empty. This is in
20 * violation of PKCS#10 but we need to tolerate it. We do
21 * this by making the attributes field OPTIONAL then using
22 * the callback to initialise it to an empty STACK.
23 *
24 * This means that the field will be correctly encoded unless
25 * we NULL out the field.
26 *
27 * As a result we no longer need the req_kludge field because
28 * the information is now contained in the attributes field:
29 * 1. If it is NULL then it's the invalid omission.
30 * 2. If it is empty it is the correct encoding.
31 * 3. If it is not empty then some attributes are present.
32 *
33 */
34
35static int rinf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
36 void *exarg)
37{
38 X509_REQ_INFO *rinf = (X509_REQ_INFO *)*pval;
39
40 if (operation == ASN1_OP_NEW_POST) {
41 rinf->attributes = sk_X509_ATTRIBUTE_new_null();
42 if (!rinf->attributes)
43 return 0;
44 }
45 return 1;
46}
47
48static int req_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
49 void *exarg)
50{
51#ifndef OPENSSL_NO_SM2
52 X509_REQ *ret = (X509_REQ *)*pval;
53
54 switch (operation) {
55 case ASN1_OP_D2I_PRE:
56 ASN1_OCTET_STRING_free(ret->sm2_id);
57 /* fall thru */
58 case ASN1_OP_NEW_POST:
59 ret->sm2_id = NULL;
60 break;
61
62 case ASN1_OP_FREE_POST:
63 ASN1_OCTET_STRING_free(ret->sm2_id);
64 break;
65 }
66#endif
67
68 return 1;
69}
70
71ASN1_SEQUENCE_enc(X509_REQ_INFO, enc, rinf_cb) = {
72 ASN1_SIMPLE(X509_REQ_INFO, version, ASN1_INTEGER),
73 ASN1_SIMPLE(X509_REQ_INFO, subject, X509_NAME),
74 ASN1_SIMPLE(X509_REQ_INFO, pubkey, X509_PUBKEY),
75 /* This isn't really OPTIONAL but it gets round invalid
76 * encodings
77 */
78 ASN1_IMP_SET_OF_OPT(X509_REQ_INFO, attributes, X509_ATTRIBUTE, 0)
79} ASN1_SEQUENCE_END_enc(X509_REQ_INFO, X509_REQ_INFO)
80
81IMPLEMENT_ASN1_FUNCTIONS(X509_REQ_INFO)
82
83ASN1_SEQUENCE_ref(X509_REQ, req_cb) = {
84 ASN1_EMBED(X509_REQ, req_info, X509_REQ_INFO),
85 ASN1_EMBED(X509_REQ, sig_alg, X509_ALGOR),
86 ASN1_SIMPLE(X509_REQ, signature, ASN1_BIT_STRING)
87} ASN1_SEQUENCE_END_ref(X509_REQ, X509_REQ)
88
89IMPLEMENT_ASN1_FUNCTIONS(X509_REQ)
90
91IMPLEMENT_ASN1_DUP_FUNCTION(X509_REQ)
92
93#ifndef OPENSSL_NO_SM2
94void X509_REQ_set0_sm2_id(X509_REQ *x, ASN1_OCTET_STRING *sm2_id)
95{
96 ASN1_OCTET_STRING_free(x->sm2_id);
97 x->sm2_id = sm2_id;
98}
99
100ASN1_OCTET_STRING *X509_REQ_get0_sm2_id(X509_REQ *x)
101{
102 return x->sm2_id;
103}
104#endif
105