conf_api.c revision 296465 
1/* conf_api.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/* Part of the code in here was originally in conf.c, which is now removed */
60
61#ifndef CONF_DEBUG
62# undef NDEBUG                  /* avoid conflicting definitions */
63# define NDEBUG
64#endif
65
66#include <assert.h>
67#include <stdlib.h>
68#include <string.h>
69#include <openssl/conf.h>
70#include <openssl/conf_api.h>
71#include "e_os.h"
72
73static void value_free_hash(CONF_VALUE *a, LHASH *conf);
74static void value_free_stack(CONF_VALUE *a, LHASH *conf);
75static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE *, LHASH *)
76static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_stack, CONF_VALUE *, LHASH *)
77/*
78 * We don't use function pointer casting or wrapper functions - but cast each
79 * callback parameter inside the callback functions.
80 */
81/* static unsigned long hash(CONF_VALUE *v); */
82static unsigned long hash(const void *v_void);
83/* static int cmp_conf(CONF_VALUE *a,CONF_VALUE *b); */
84static int cmp_conf(const void *a_void, const void *b_void);
85
86/* Up until OpenSSL 0.9.5a, this was get_section */
87CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section)
88{
89    CONF_VALUE *v, vv;
90
91    if ((conf == NULL) || (section == NULL))
92        return (NULL);
93    vv.name = NULL;
94    vv.section = (char *)section;
95    v = (CONF_VALUE *)lh_retrieve(conf->data, &vv);
96    return (v);
97}
98
99/* Up until OpenSSL 0.9.5a, this was CONF_get_section */
100STACK_OF(CONF_VALUE) *_CONF_get_section_values(const CONF *conf,
101                                               const char *section)
102{
103    CONF_VALUE *v;
104
105    v = _CONF_get_section(conf, section);
106    if (v != NULL)
107        return ((STACK_OF(CONF_VALUE) *)v->value);
108    else
109        return (NULL);
110}
111
112int _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value)
113{
114    CONF_VALUE *v = NULL;
115    STACK_OF(CONF_VALUE) *ts;
116
117    ts = (STACK_OF(CONF_VALUE) *)section->value;
118
119    value->section = section->section;
120    if (!sk_CONF_VALUE_push(ts, value)) {
121        return 0;
122    }
123
124    v = (CONF_VALUE *)lh_insert(conf->data, value);
125    if (v != NULL) {
126        (void)sk_CONF_VALUE_delete_ptr(ts, v);
127        OPENSSL_free(v->name);
128        OPENSSL_free(v->value);
129        OPENSSL_free(v);
130    }
131    return 1;
132}
133
134char *_CONF_get_string(const CONF *conf, const char *section,
135                       const char *name)
136{
137    CONF_VALUE *v, vv;
138    char *p;
139
140    if (name == NULL)
141        return (NULL);
142    if (conf != NULL) {
143        if (section != NULL) {
144            vv.name = (char *)name;
145            vv.section = (char *)section;
146            v = (CONF_VALUE *)lh_retrieve(conf->data, &vv);
147            if (v != NULL)
148                return (v->value);
149            if (strcmp(section, "ENV") == 0) {
150                p = Getenv(name);
151                if (p != NULL)
152                    return (p);
153            }
154        }
155        vv.section = "default";
156        vv.name = (char *)name;
157        v = (CONF_VALUE *)lh_retrieve(conf->data, &vv);
158        if (v != NULL)
159            return (v->value);
160        else
161            return (NULL);
162    } else
163        return (Getenv(name));
164}
165
166#if 0                           /* There's no way to provide error checking
167                                 * with this function, so force implementors
168                                 * of the higher levels to get a string and
169                                 * read the number themselves. */
170long _CONF_get_number(CONF *conf, char *section, char *name)
171{
172    char *str;
173    long ret = 0;
174
175    str = _CONF_get_string(conf, section, name);
176    if (str == NULL)
177        return (0);
178    for (;;) {
179        if (conf->meth->is_number(conf, *str))
180            ret = ret * 10 + conf->meth->to_int(conf, *str);
181        else
182            return (ret);
183        str++;
184    }
185}
186#endif
187
188int _CONF_new_data(CONF *conf)
189{
190    if (conf == NULL) {
191        return 0;
192    }
193    if (conf->data == NULL)
194        if ((conf->data = lh_new(hash, cmp_conf)) == NULL) {
195            return 0;
196        }
197    return 1;
198}
199
200void _CONF_free_data(CONF *conf)
201{
202    if (conf == NULL || conf->data == NULL)
203        return;
204
205    conf->data->down_load = 0;  /* evil thing to make sure the
206                                 * 'OPENSSL_free()' works as expected */
207    lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(value_free_hash), conf->data);
208
209    /*
210     * We now have only 'section' entries in the hash table. Due to problems
211     * with
212     */
213
214    lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(value_free_stack),
215                 conf->data);
216    lh_free(conf->data);
217}
218
219static void value_free_hash(CONF_VALUE *a, LHASH *conf)
220{
221    if (a->name != NULL) {
222        a = (CONF_VALUE *)lh_delete(conf, a);
223    }
224}
225
226static void value_free_stack(CONF_VALUE *a, LHASH *conf)
227{
228    CONF_VALUE *vv;
229    STACK *sk;
230    int i;
231
232    if (a->name != NULL)
233        return;
234
235    sk = (STACK *) a->value;
236    for (i = sk_num(sk) - 1; i >= 0; i--) {
237        vv = (CONF_VALUE *)sk_value(sk, i);
238        OPENSSL_free(vv->value);
239        OPENSSL_free(vv->name);
240        OPENSSL_free(vv);
241    }
242    if (sk != NULL)
243        sk_free(sk);
244    OPENSSL_free(a->section);
245    OPENSSL_free(a);
246}
247
248/* static unsigned long hash(CONF_VALUE *v) */
249static unsigned long hash(const void *v_void)
250{
251    CONF_VALUE *v = (CONF_VALUE *)v_void;
252    return ((lh_strhash(v->section) << 2) ^ lh_strhash(v->name));
253}
254
255/* static int cmp_conf(CONF_VALUE *a, CONF_VALUE *b) */
256static int cmp_conf(const void *a_void, const void *b_void)
257{
258    int i;
259    CONF_VALUE *a = (CONF_VALUE *)a_void;
260    CONF_VALUE *b = (CONF_VALUE *)b_void;
261
262    if (a->section != b->section) {
263        i = strcmp(a->section, b->section);
264        if (i)
265            return (i);
266    }
267
268    if ((a->name != NULL) && (b->name != NULL)) {
269        i = strcmp(a->name, b->name);
270        return (i);
271    } else if (a->name == b->name)
272        return (0);
273    else
274        return ((a->name == NULL) ? -1 : 1);
275}
276
277/* Up until OpenSSL 0.9.5a, this was new_section */
278CONF_VALUE *_CONF_new_section(CONF *conf, const char *section)
279{
280    STACK *sk = NULL;
281    int ok = 0, i;
282    CONF_VALUE *v = NULL, *vv;
283
284    if ((sk = sk_new_null()) == NULL)
285        goto err;
286    if ((v = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))) == NULL)
287        goto err;
288    i = strlen(section) + 1;
289    if ((v->section = (char *)OPENSSL_malloc(i)) == NULL)
290        goto err;
291
292    memcpy(v->section, section, i);
293    v->name = NULL;
294    v->value = (char *)sk;
295
296    vv = (CONF_VALUE *)lh_insert(conf->data, v);
297    OPENSSL_assert(vv == NULL);
298    ok = 1;
299 err:
300    if (!ok) {
301        if (sk != NULL)
302            sk_free(sk);
303        if (v != NULL)
304            OPENSSL_free(v);
305        v = NULL;
306    }
307    return (v);
308}
309
310IMPLEMENT_STACK_OF(CONF_VALUE)
311