conf_api.c revision 340704 
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 "cryptlib.h"
70#include <openssl/conf.h>
71#include <openssl/conf_api.h>
72#include "e_os.h"
73
74static void value_free_hash_doall_arg(CONF_VALUE *a,
75                                      LHASH_OF(CONF_VALUE) *conf);
76static void value_free_stack_doall(CONF_VALUE *a);
77static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE,
78                                    LHASH_OF(CONF_VALUE))
79static IMPLEMENT_LHASH_DOALL_FN(value_free_stack, CONF_VALUE)
80
81/* Up until OpenSSL 0.9.5a, this was get_section */
82CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section)
83{
84    CONF_VALUE *v, vv;
85
86    if ((conf == NULL) || (section == NULL))
87        return (NULL);
88    vv.name = NULL;
89    vv.section = (char *)section;
90    v = lh_CONF_VALUE_retrieve(conf->data, &vv);
91    return (v);
92}
93
94/* Up until OpenSSL 0.9.5a, this was CONF_get_section */
95STACK_OF(CONF_VALUE) *_CONF_get_section_values(const CONF *conf,
96                                               const char *section)
97{
98    CONF_VALUE *v;
99
100    v = _CONF_get_section(conf, section);
101    if (v != NULL)
102        return ((STACK_OF(CONF_VALUE) *)v->value);
103    else
104        return (NULL);
105}
106
107int _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value)
108{
109    CONF_VALUE *v = NULL;
110    STACK_OF(CONF_VALUE) *ts;
111
112    ts = (STACK_OF(CONF_VALUE) *)section->value;
113
114    value->section = section->section;
115    if (!sk_CONF_VALUE_push(ts, value)) {
116        return 0;
117    }
118
119    v = lh_CONF_VALUE_insert(conf->data, value);
120    if (v != NULL) {
121        (void)sk_CONF_VALUE_delete_ptr(ts, v);
122        OPENSSL_free(v->name);
123        OPENSSL_free(v->value);
124        OPENSSL_free(v);
125    }
126    return 1;
127}
128
129char *_CONF_get_string(const CONF *conf, const char *section,
130                       const char *name)
131{
132    CONF_VALUE *v, vv;
133    char *p;
134
135    if (name == NULL)
136        return (NULL);
137    if (conf != NULL) {
138        if (section != NULL) {
139            vv.name = (char *)name;
140            vv.section = (char *)section;
141            v = lh_CONF_VALUE_retrieve(conf->data, &vv);
142            if (v != NULL)
143                return (v->value);
144            if (strcmp(section, "ENV") == 0) {
145                p = ossl_safe_getenv(name);
146                if (p != NULL)
147                    return (p);
148            }
149        }
150        vv.section = "default";
151        vv.name = (char *)name;
152        v = lh_CONF_VALUE_retrieve(conf->data, &vv);
153        if (v != NULL)
154            return (v->value);
155        else
156            return (NULL);
157    } else
158        return (ossl_safe_getenv(name));
159}
160
161#if 0                           /* There's no way to provide error checking
162                                 * with this function, so force implementors
163                                 * of the higher levels to get a string and
164                                 * read the number themselves. */
165long _CONF_get_number(CONF *conf, char *section, char *name)
166{
167    char *str;
168    long ret = 0;
169
170    str = _CONF_get_string(conf, section, name);
171    if (str == NULL)
172        return (0);
173    for (;;) {
174        if (conf->meth->is_number(conf, *str))
175            ret = ret * 10 + conf->meth->to_int(conf, *str);
176        else
177            return (ret);
178        str++;
179    }
180}
181#endif
182
183static unsigned long conf_value_hash(const CONF_VALUE *v)
184{
185    return (lh_strhash(v->section) << 2) ^ lh_strhash(v->name);
186}
187
188static IMPLEMENT_LHASH_HASH_FN(conf_value, CONF_VALUE)
189
190static int conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b)
191{
192    int i;
193
194    if (a->section != b->section) {
195        i = strcmp(a->section, b->section);
196        if (i)
197            return (i);
198    }
199
200    if ((a->name != NULL) && (b->name != NULL)) {
201        i = strcmp(a->name, b->name);
202        return (i);
203    } else if (a->name == b->name)
204        return (0);
205    else
206        return ((a->name == NULL) ? -1 : 1);
207}
208
209static IMPLEMENT_LHASH_COMP_FN(conf_value, CONF_VALUE)
210
211int _CONF_new_data(CONF *conf)
212{
213    if (conf == NULL) {
214        return 0;
215    }
216    if (conf->data == NULL)
217        if ((conf->data = lh_CONF_VALUE_new()) == NULL) {
218            return 0;
219        }
220    return 1;
221}
222
223void _CONF_free_data(CONF *conf)
224{
225    if (conf == NULL || conf->data == NULL)
226        return;
227
228    lh_CONF_VALUE_down_load(conf->data) = 0; /* evil thing to make * sure the
229                                              * 'OPENSSL_free()' works as *
230                                              * expected */
231    lh_CONF_VALUE_doall_arg(conf->data,
232                            LHASH_DOALL_ARG_FN(value_free_hash),
233                            LHASH_OF(CONF_VALUE), conf->data);
234
235    /*
236     * We now have only 'section' entries in the hash table. Due to problems
237     * with
238     */
239
240    lh_CONF_VALUE_doall(conf->data, LHASH_DOALL_FN(value_free_stack));
241    lh_CONF_VALUE_free(conf->data);
242}
243
244static void value_free_hash_doall_arg(CONF_VALUE *a,
245                                      LHASH_OF(CONF_VALUE) *conf)
246{
247    if (a->name != NULL)
248        (void)lh_CONF_VALUE_delete(conf, a);
249}
250
251static void value_free_stack_doall(CONF_VALUE *a)
252{
253    CONF_VALUE *vv;
254    STACK_OF(CONF_VALUE) *sk;
255    int i;
256
257    if (a->name != NULL)
258        return;
259
260    sk = (STACK_OF(CONF_VALUE) *)a->value;
261    for (i = sk_CONF_VALUE_num(sk) - 1; i >= 0; i--) {
262        vv = sk_CONF_VALUE_value(sk, i);
263        OPENSSL_free(vv->value);
264        OPENSSL_free(vv->name);
265        OPENSSL_free(vv);
266    }
267    if (sk != NULL)
268        sk_CONF_VALUE_free(sk);
269    OPENSSL_free(a->section);
270    OPENSSL_free(a);
271}
272
273/* Up until OpenSSL 0.9.5a, this was new_section */
274CONF_VALUE *_CONF_new_section(CONF *conf, const char *section)
275{
276    STACK_OF(CONF_VALUE) *sk = NULL;
277    int ok = 0, i;
278    CONF_VALUE *v = NULL, *vv;
279
280    if ((sk = sk_CONF_VALUE_new_null()) == NULL)
281        goto err;
282    if ((v = OPENSSL_malloc(sizeof(CONF_VALUE))) == NULL)
283        goto err;
284    i = strlen(section) + 1;
285    if ((v->section = OPENSSL_malloc(i)) == NULL)
286        goto err;
287
288    memcpy(v->section, section, i);
289    v->name = NULL;
290    v->value = (char *)sk;
291
292    vv = lh_CONF_VALUE_insert(conf->data, v);
293    OPENSSL_assert(vv == NULL);
294    if (lh_CONF_VALUE_error(conf->data) > 0)
295        goto err;
296    ok = 1;
297 err:
298    if (!ok) {
299        if (sk != NULL)
300            sk_CONF_VALUE_free(sk);
301        if (v != NULL)
302            OPENSSL_free(v);
303        v = NULL;
304    }
305    return (v);
306}
307
308IMPLEMENT_STACK_OF(CONF_VALUE)
309