aboutsummaryrefslogtreecommitdiffstats
path: root/crypto/conf/conf_api.c
blob: 5e57d749ce5e7cc205e0e5140d19252b3517d8f0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
/*
 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/* Part of the code in here was originally in conf.c, which is now removed */

#include "e_os.h"
#include "internal/cryptlib.h"
#include <stdlib.h>
#include <string.h>
#include <openssl/conf.h>
#include <openssl/conf_api.h>

static void value_free_hash(const CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf);
static void value_free_stack_doall(CONF_VALUE *a);

/* Up until OpenSSL 0.9.5a, this was get_section */
CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section)
{
    CONF_VALUE *v, vv;

    if ((conf == NULL) || (section == NULL))
        return NULL;
    vv.name = NULL;
    vv.section = (char *)section;
    v = lh_CONF_VALUE_retrieve(conf->data, &vv);
    return v;
}

/* Up until OpenSSL 0.9.5a, this was CONF_get_section */
STACK_OF(CONF_VALUE) *_CONF_get_section_values(const CONF *conf,
                                               const char *section)
{
    CONF_VALUE *v;

    v = _CONF_get_section(conf, section);
    if (v != NULL)
        return ((STACK_OF(CONF_VALUE) *)v->value);
    else
        return NULL;
}

int _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value)
{
    CONF_VALUE *v = NULL;
    STACK_OF(CONF_VALUE) *ts;

    ts = (STACK_OF(CONF_VALUE) *)section->value;

    value->section = section->section;
    if (!sk_CONF_VALUE_push(ts, value)) {
        return 0;
    }

    v = lh_CONF_VALUE_insert(conf->data, value);
    if (v != NULL) {
        (void)sk_CONF_VALUE_delete_ptr(ts, v);
        OPENSSL_free(v->name);
        OPENSSL_free(v->value);
        OPENSSL_free(v);
    }
    return 1;
}

char *_CONF_get_string(const CONF *conf, const char *section,
                       const char *name)
{
    CONF_VALUE *v, vv;
    char *p;

    if (name == NULL)
        return NULL;
    if (conf != NULL) {
        if (section != NULL) {
            vv.name = (char *)name;
            vv.section = (char *)section;
            v = lh_CONF_VALUE_retrieve(conf->data, &vv);
            if (v != NULL)
                return v->value;
            if (strcmp(section, "ENV") == 0) {
                p = ossl_safe_getenv(name);
                if (p != NULL)
                    return p;
            }
        }
        vv.section = "default";
        vv.name = (char *)name;
        v = lh_CONF_VALUE_retrieve(conf->data, &vv);
        if (v != NULL)
            return v->value;
        else
            return NULL;
    } else
        return ossl_safe_getenv(name);
}

static unsigned long conf_value_hash(const CONF_VALUE *v)
{
    return (OPENSSL_LH_strhash(v->section) << 2) ^ OPENSSL_LH_strhash(v->name);
}

static int conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b)
{
    int i;

    if (a->section != b->section) {
        i = strcmp(a->section, b->section);
        if (i)
            return i;
    }

    if ((a->name != NULL) && (b->name != NULL)) {
        i = strcmp(a->name, b->name);
        return i;
    } else if (a->name == b->name)
        return 0;
    else
        return ((a->name == NULL) ? -1 : 1);
}

int _CONF_new_data(CONF *conf)
{
    if (conf == NULL) {
        return 0;
    }
    if (conf->data == NULL) {
        conf->data = lh_CONF_VALUE_new(conf_value_hash, conf_value_cmp);
        if (conf->data == NULL)
            return 0;
    }
    return 1;
}

typedef LHASH_OF(CONF_VALUE) LH_CONF_VALUE;

IMPLEMENT_LHASH_DOALL_ARG_CONST(CONF_VALUE, LH_CONF_VALUE);

void _CONF_free_data(CONF *conf)
{
    if (conf == NULL || conf->data == NULL)
        return;

    /* evil thing to make sure the 'OPENSSL_free()' works as expected */
    lh_CONF_VALUE_set_down_load(conf->data, 0);
    lh_CONF_VALUE_doall_LH_CONF_VALUE(conf->data, value_free_hash, conf->data);

    /*
     * We now have only 'section' entries in the hash table. Due to problems
     * with
     */

    lh_CONF_VALUE_doall(conf->data, value_free_stack_doall);
    lh_CONF_VALUE_free(conf->data);
}

static void value_free_hash(const CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf)
{
    if (a->name != NULL)
        (void)lh_CONF_VALUE_delete(conf, a);
}

static void value_free_stack_doall(CONF_VALUE *a)
{
    CONF_VALUE *vv;
    STACK_OF(CONF_VALUE) *sk;
    int i;

    if (a->name != NULL)
        return;

    sk = (STACK_OF(CONF_VALUE) *)a->value;
    for (i = sk_CONF_VALUE_num(sk) - 1; i >= 0; i--) {
        vv = sk_CONF_VALUE_value(sk, i);
        OPENSSL_free(vv->value);
        OPENSSL_free(vv->name);
        OPENSSL_free(vv);
    }
    sk_CONF_VALUE_free(sk);
    OPENSSL_free(a->section);
    OPENSSL_free(a);
}

/* Up until OpenSSL 0.9.5a, this was new_section */
CONF_VALUE *_CONF_new_section(CONF *conf, const char *section)
{
    STACK_OF(CONF_VALUE) *sk = NULL;
    int i;
    CONF_VALUE *v = NULL, *vv;

    if ((sk = sk_CONF_VALUE_new_null()) == NULL)
        goto err;
    if ((v = OPENSSL_malloc(sizeof(*v))) == NULL)
        goto err;
    i = strlen(section) + 1;
    if ((v->section = OPENSSL_malloc(i)) == NULL)
        goto err;

    memcpy(v->section, section, i);
    v->name = NULL;
    v->value = (char *)sk;

    vv = lh_CONF_VALUE_insert(conf->data, v);
    if (vv != NULL || lh_CONF_VALUE_error(conf->data) > 0)
        goto err;
    return v;

 err:
    sk_CONF_VALUE_free(sk);
    if (v != NULL)
        OPENSSL_free(v->section);
    OPENSSL_free(v);
    return NULL;
}