lib/libcrypto/conf/conf_api.c

   1 /* $OpenBSD: conf_api.c,v 1.15 2015/04/11 16:03:21 deraadt Exp $ */
   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 <stdlib.h>
  67 #include <string.h>
  68 #include <unistd.h>
  69 #include <openssl/conf.h>
  70 #include <openssl/conf_api.h>
  71
  72 static void value_free_hash_doall_arg(CONF_VALUE *a,
  73     LHASH_OF(CONF_VALUE) *conf);
  74 static void value_free_stack_doall(CONF_VALUE *a);
  75 static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE,
  76     LHASH_OF(CONF_VALUE))
  77 static IMPLEMENT_LHASH_DOALL_FN(value_free_stack, CONF_VALUE)
  78
  79 /* Up until OpenSSL 0.9.5a, this was get_section */
  80 CONF_VALUE *
  81 _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) *
  95 _CONF_get_section_values(const CONF *conf, 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
 107 _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                 free(v->name);
 123                 free(v->value);
 124                 free(v);
 125         }
 126         return 1;
 127 }
 128
 129 char *
 130 _CONF_get_string(const CONF *conf, const char *section, const char *name)
 131 {
 132         CONF_VALUE *v, vv;
 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                 }
 144                 vv.section = "default";
 145                 vv.name = (char *)name;
 146                 v = lh_CONF_VALUE_retrieve(conf->data, &vv);
 147                 if (v != NULL)
 148                         return (v->value);
 149                 else
 150                         return (NULL);
 151         } else
 152                 return (NULL);
 153 }
 154
 155 static unsigned long
 156 conf_value_hash(const CONF_VALUE *v)
 157 {
 158         return (lh_strhash(v->section) << 2) ^ lh_strhash(v->name);
 159 }
 160
 161 static IMPLEMENT_LHASH_HASH_FN(conf_value, CONF_VALUE)
 162
 163 static int
 164 conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b)
 165 {
 166         int i;
 167
 168         if (a->section != b->section) {
 169                 i = strcmp(a->section, b->section);
 170                 if (i)
 171                         return (i);
 172         }
 173         if ((a->name != NULL) && (b->name != NULL)) {
 174                 i = strcmp(a->name, b->name);
 175                 return (i);
 176         } else if (a->name == b->name)
 177                 return (0);
 178         else
 179                 return ((a->name == NULL)?-1 : 1);
 180 }
 181
 182 static IMPLEMENT_LHASH_COMP_FN(conf_value, CONF_VALUE)
 183
 184 int
 185 _CONF_new_data(CONF *conf)
 186 {
 187         if (conf == NULL) {
 188                 return 0;
 189         }
 190         if (conf->data == NULL)
 191                 if ((conf->data = lh_CONF_VALUE_new()) == NULL) {
 192                         return 0;
 193                 }
 194         return 1;
 195 }
 196
 197 void
 198 _CONF_free_data(CONF *conf)
 199 {
 200         if (conf == NULL || conf->data == NULL)
 201                 return;
 202
 203         lh_CONF_VALUE_down_load(conf->data) = 0; /* evil thing to make
 204                                                   * sure the 'free()' works as
 205                                                   * expected */
 206         lh_CONF_VALUE_doall_arg(conf->data,
 207             LHASH_DOALL_ARG_FN(value_free_hash),
 208             LHASH_OF(CONF_VALUE), conf->data);
 209
 210         /* We now have only 'section' entries in the hash table.
 211          * Due to problems with */
 212
 213         lh_CONF_VALUE_doall(conf->data, LHASH_DOALL_FN(value_free_stack));
 214         lh_CONF_VALUE_free(conf->data);
 215 }
 216
 217 static void
 218 value_free_hash_doall_arg(CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf)
 219 {
 220         if (a->name != NULL)
 221                 (void)lh_CONF_VALUE_delete(conf, a);
 222 }
 223
 224 static void
 225 value_free_stack_doall(CONF_VALUE *a)
 226 {
 227         CONF_VALUE *vv;
 228         STACK_OF(CONF_VALUE) *sk;
 229         int i;
 230
 231         if (a->name != NULL)
 232                 return;
 233
 234         sk = (STACK_OF(CONF_VALUE) *)a->value;
 235         for (i = sk_CONF_VALUE_num(sk) - 1; i >= 0; i--) {
 236                 vv = sk_CONF_VALUE_value(sk, i);
 237                 free(vv->value);
 238                 free(vv->name);
 239                 free(vv);
 240         }
 241         if (sk != NULL)
 242                 sk_CONF_VALUE_free(sk);
 243         free(a->section);
 244         free(a);
 245 }
 246
 247 /* Up until OpenSSL 0.9.5a, this was new_section */
 248 CONF_VALUE *
 249 _CONF_new_section(CONF *conf, const char *section)
 250 {
 251         STACK_OF(CONF_VALUE) *sk = NULL;
 252         int ok = 0, i;
 253         CONF_VALUE *v = NULL, *vv;
 254
 255         if ((sk = sk_CONF_VALUE_new_null()) == NULL)
 256                 goto err;
 257         if ((v = malloc(sizeof(CONF_VALUE))) == NULL)
 258                 goto err;
 259         i = strlen(section) + 1;
 260         if ((v->section = malloc(i)) == NULL)
 261                 goto err;
 262
 263         memcpy(v->section, section, i);
 264         v->name = NULL;
 265         v->value = (char *)sk;
 266
 267         vv = lh_CONF_VALUE_insert(conf->data, v);
 268         OPENSSL_assert(vv == NULL);
 269         ok = 1;
 270
 271 err:
 272         if (!ok) {
 273                 if (sk != NULL)
 274                         sk_CONF_VALUE_free(sk);
 275                 free(v);
 276                 v = NULL;
 277         }
 278         return (v);
 279 }