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 <string.h>
  68 #include <openssl/conf.h>
  69 #include <openssl/conf_api.h>
  70 #include "e_os.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 *_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 */
  92 STACK_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
 104 int _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
 128 char *_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. */
 163 long _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
 181 static unsigned long conf_value_hash(const CONF_VALUE *v)
 182         {
 183         return (lh_strhash(v->section)<<2)^lh_strhash(v->name);
 184         }
 185 static IMPLEMENT_LHASH_HASH_FN(conf_value, CONF_VALUE)
 186
 187 static 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         }
 207 static IMPLEMENT_LHASH_COMP_FN(conf_value, CONF_VALUE)
 208
 209 int _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
 223 void _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
 241 static void value_free_hash_doall_arg(CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf)
 242         {
 243         if (a->name != NULL)
 244                 lh_CONF_VALUE_delete(conf,a);
 245         }
 246
 247 static 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 */
 269 CONF_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         assert(vv == NULL);
 289         ok=1;
 290 err:
 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
 300 IMPLEMENT_STACK_OF(CONF_VALUE)