1/*
2 * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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/asn1.h>
13#include <openssl/asn1t.h>
14#include <openssl/conf.h>
15#include <openssl/x509v3.h>
16#include "ext_dat.h"
17
18static STACK_OF(CONF_VALUE) *i2v_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
19                                                   BASIC_CONSTRAINTS *bcons,
20                                                   STACK_OF(CONF_VALUE)
21                                                   *extlist);
22static BASIC_CONSTRAINTS *v2i_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
23                                                X509V3_CTX *ctx,
24                                                STACK_OF(CONF_VALUE) *values);
25
26const X509V3_EXT_METHOD v3_bcons = {
27    NID_basic_constraints, 0,
28    ASN1_ITEM_ref(BASIC_CONSTRAINTS),
29    0, 0, 0, 0,
30    0, 0,
31    (X509V3_EXT_I2V) i2v_BASIC_CONSTRAINTS,
32    (X509V3_EXT_V2I)v2i_BASIC_CONSTRAINTS,
33    NULL, NULL,
34    NULL
35};
36
37ASN1_SEQUENCE(BASIC_CONSTRAINTS) = {
38        ASN1_OPT(BASIC_CONSTRAINTS, ca, ASN1_FBOOLEAN),
39        ASN1_OPT(BASIC_CONSTRAINTS, pathlen, ASN1_INTEGER)
40} ASN1_SEQUENCE_END(BASIC_CONSTRAINTS)
41
42IMPLEMENT_ASN1_FUNCTIONS(BASIC_CONSTRAINTS)
43
44static STACK_OF(CONF_VALUE) *i2v_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
45                                                   BASIC_CONSTRAINTS *bcons,
46                                                   STACK_OF(CONF_VALUE)
47                                                   *extlist)
48{
49    X509V3_add_value_bool("CA", bcons->ca, &extlist);
50    X509V3_add_value_int("pathlen", bcons->pathlen, &extlist);
51    return extlist;
52}
53
54static BASIC_CONSTRAINTS *v2i_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
55                                                X509V3_CTX *ctx,
56                                                STACK_OF(CONF_VALUE) *values)
57{
58    BASIC_CONSTRAINTS *bcons = NULL;
59    CONF_VALUE *val;
60    int i;
61
62    if ((bcons = BASIC_CONSTRAINTS_new()) == NULL) {
63        X509V3err(X509V3_F_V2I_BASIC_CONSTRAINTS, ERR_R_MALLOC_FAILURE);
64        return NULL;
65    }
66    for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
67        val = sk_CONF_VALUE_value(values, i);
68        if (strcmp(val->name, "CA") == 0) {
69            if (!X509V3_get_value_bool(val, &bcons->ca))
70                goto err;
71        } else if (strcmp(val->name, "pathlen") == 0) {
72            if (!X509V3_get_value_int(val, &bcons->pathlen))
73                goto err;
74        } else {
75            X509V3err(X509V3_F_V2I_BASIC_CONSTRAINTS, X509V3_R_INVALID_NAME);
76            X509V3_conf_err(val);
77            goto err;
78        }
79    }
80    return bcons;
81 err:
82    BASIC_CONSTRAINTS_free(bcons);
83    return NULL;
84}
85