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