crypto/conf/conf_api.c

   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
  73 static void value_free_hash_doall_arg(CONF_VALUE *a,
  74                                       LHASH_OF(CONF_VALUE) *conf);
  75 static void value_free_stack_doall(CONF_VALUE *a);
  76 static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE,
  77                                     LHASH_OF(CONF_VALUE))
  78 static IMPLEMENT_LHASH_DOALL_FN(value_free_stack, CONF_VALUE)
  79
  80 /* Up until OpenSSL 0.9.5a, this was get_section */
  81 CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section)
  82 {
  83     CONF_VALUE *v, vv;
  84
  85     if ((conf == NULL) || (section == NULL))
  86         return (NULL);
  87     vv.name = NULL;
  88     vv.section = (char *)section;
  89     v = lh_CONF_VALUE_retrieve(conf->data, &vv);
  90     return (v);
  91 }
  92
  93 /* Up until OpenSSL 0.9.5a, this was CONF_get_section */
  94 STACK_OF(CONF_VALUE) *_CONF_get_section_values(const CONF *conf,
  95                                                const char *section)
  96 {
  97     CONF_VALUE *v;
  98
  99     v = _CONF_get_section(conf, section);
 100     if (v != NULL)
 101         return ((STACK_OF(CONF_VALUE) *)v->value);
 102     else
 103         return (NULL);
 104 }
 105
 106 int _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value)
 107 {
 108     CONF_VALUE *v = NULL;
 109     STACK_OF(CONF_VALUE) *ts;
 110
 111     ts = (STACK_OF(CONF_VALUE) *)section->value;
 112
 113     value->section = section->section;
 114     if (!sk_CONF_VALUE_push(ts, value)) {
 115         return 0;
 116     }
 117
 118     v = lh_CONF_VALUE_insert(conf->data, value);
 119     if (v != NULL) {
 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
 128 char *_CONF_get_string(const CONF *conf, const char *section,
 129                        const char *name)
 130 {
 131     CONF_VALUE *v, vv;
 132     char *p;
 133
 134     if (name == NULL)
 135         return (NULL);
 136     if (conf != NULL) {
 137         if (section != NULL) {
 138             vv.name = (char *)name;
 139             vv.section = (char *)section;
 140             v = lh_CONF_VALUE_retrieve(conf->data, &vv);
 141             if (v != NULL)
 142                 return (v->value);
 143             if (strcmp(section, "ENV") == 0) {
 144                 p = getenv(name);
 145                 if (p != NULL)
 146                     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     } else
 157         return (getenv(name));
 158 }
 159
 160 static unsigned long conf_value_hash(const CONF_VALUE *v)
 161 {
 162     return (lh_strhash(v->section) << 2) ^ lh_strhash(v->name);
 163 }
 164
 165 static IMPLEMENT_LHASH_HASH_FN(conf_value, CONF_VALUE)
 166
 167 static int conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b)
 168 {
 169     int i;
 170
 171     if (a->section != b->section) {
 172         i = strcmp(a->section, b->section);
 173         if (i)
 174             return (i);
 175     }
 176
 177     if ((a->name != NULL) && (b->name != NULL)) {
 178         i = strcmp(a->name, b->name);
 179         return (i);
 180     } else if (a->name == b->name)
 181         return (0);
 182     else
 183         return ((a->name == NULL) ? -1 : 1);
 184 }
 185
 186 static IMPLEMENT_LHASH_COMP_FN(conf_value, CONF_VALUE)
 187
 188 int _CONF_new_data(CONF *conf)
 189 {
 190     if (conf == NULL) {
 191         return 0;
 192     }
 193     if (conf->data == NULL)
 194         if ((conf->data = lh_CONF_VALUE_new()) == NULL) {
 195             return 0;
 196         }
 197     return 1;
 198 }
 199
 200 void _CONF_free_data(CONF *conf)
 201 {
 202     if (conf == NULL || conf->data == NULL)
 203         return;
 204
 205     lh_CONF_VALUE_down_load(conf->data) = 0; /* evil thing to make * sure the
 206                                               * 'OPENSSL_free()' works as *
 207                                               * expected */
 208     lh_CONF_VALUE_doall_arg(conf->data,
 209                             LHASH_DOALL_ARG_FN(value_free_hash),
 210                             LHASH_OF(CONF_VALUE), conf->data);
 211
 212     /*
 213      * We now have only 'section' entries in the hash table. Due to problems
 214      * with
 215      */
 216
 217     lh_CONF_VALUE_doall(conf->data, LHASH_DOALL_FN(value_free_stack));
 218     lh_CONF_VALUE_free(conf->data);
 219 }
 220
 221 static void value_free_hash_doall_arg(CONF_VALUE *a,
 222                                       LHASH_OF(CONF_VALUE) *conf)
 223 {
 224     if (a->name != NULL)
 225         (void)lh_CONF_VALUE_delete(conf, a);
 226 }
 227
 228 static void value_free_stack_doall(CONF_VALUE *a)
 229 {
 230     CONF_VALUE *vv;
 231     STACK_OF(CONF_VALUE) *sk;
 232     int i;
 233
 234     if (a->name != NULL)
 235         return;
 236
 237     sk = (STACK_OF(CONF_VALUE) *)a->value;
 238     for (i = sk_CONF_VALUE_num(sk) - 1; i >= 0; i--) {
 239         vv = sk_CONF_VALUE_value(sk, i);
 240         OPENSSL_free(vv->value);
 241         OPENSSL_free(vv->name);
 242         OPENSSL_free(vv);
 243     }
 244     if (sk != NULL)
 245         sk_CONF_VALUE_free(sk);
 246     OPENSSL_free(a->section);
 247     OPENSSL_free(a);
 248 }
 249
 250 /* Up until OpenSSL 0.9.5a, this was new_section */
 251 CONF_VALUE *_CONF_new_section(CONF *conf, const char *section)
 252 {
 253     STACK_OF(CONF_VALUE) *sk = NULL;
 254     int ok = 0, i;
 255     CONF_VALUE *v = NULL, *vv;
 256
 257     if ((sk = sk_CONF_VALUE_new_null()) == NULL)
 258         goto err;
 259     if ((v = OPENSSL_malloc(sizeof(CONF_VALUE))) == NULL)
 260         goto err;
 261     i = strlen(section) + 1;
 262     if ((v->section = OPENSSL_malloc(i)) == NULL)
 263         goto err;
 264
 265     memcpy(v->section, section, i);
 266     v->name = NULL;
 267     v->value = (char *)sk;
 268
 269     vv = lh_CONF_VALUE_insert(conf->data, v);
 270     OPENSSL_assert(vv == NULL);
 271     ok = 1;
 272  err:
 273     if (!ok) {
 274         if (sk != NULL)
 275             sk_CONF_VALUE_free(sk);
 276         if (v != NULL)
 277             OPENSSL_free(v);
 278         v = NULL;
 279     }
 280     return (v);
 281 }