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