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_arg(CONF_VALUE *a,
  75                                        LHASH_OF(CONF_VALUE) *conf);
  76 static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE,
  77                                     LHASH_OF(CONF_VALUE))
  78 static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_stack, CONF_VALUE,
  79                                     LHASH_OF(CONF_VALUE))
  80
  81 /* Up until OpenSSL 0.9.5a, this was get_section */
  82 CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section)
  83         {
  84         CONF_VALUE *v,vv;
  85
  86         if ((conf == NULL) || (section == NULL)) 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                 {
 116                 return 0;
 117                 }
 118
 119         v = lh_CONF_VALUE_insert(conf->data, value);
 120         if (v != NULL)
 121                 {
 122                 (void)sk_CONF_VALUE_delete_ptr(ts,v);
 123                 OPENSSL_free(v->name);
 124                 OPENSSL_free(v->value);
 125                 OPENSSL_free(v);
 126                 }
 127         return 1;
 128         }
 129
 130 char *_CONF_get_string(const CONF *conf, const char *section, const char *name)
 131         {
 132         CONF_VALUE *v,vv;
 133         char *p;
 134
 135         if (name == NULL) return(NULL);
 136         if (conf != NULL)
 137                 {
 138                 if (section != NULL)
 139                         {
 140                         vv.name=(char *)name;
 141                         vv.section=(char *)section;
 142                         v=lh_CONF_VALUE_retrieve(conf->data,&vv);
 143                         if (v != NULL) return(v->value);
 144                         if (strcmp(section,"ENV") == 0)
 145                                 {
 146                                 p=getenv(name);
 147                                 if (p != NULL) return(p);
 148                                 }
 149                         }
 150                 vv.section="default";
 151                 vv.name=(char *)name;
 152                 v=lh_CONF_VALUE_retrieve(conf->data,&vv);
 153                 if (v != NULL)
 154                         return(v->value);
 155                 else
 156                         return(NULL);
 157                 }
 158         else
 159                 return(getenv(name));
 160         }
 161
 162 #if 0 /* There's no way to provide error checking with this function, so
 163          force implementors of the higher levels to get a string and read
 164          the number themselves. */
 165 long _CONF_get_number(CONF *conf, char *section, char *name)
 166         {
 167         char *str;
 168         long ret=0;
 169
 170         str=_CONF_get_string(conf,section,name);
 171         if (str == NULL) return(0);
 172         for (;;)
 173                 {
 174                 if (conf->meth->is_number(conf, *str))
 175                         ret=ret*10+conf->meth->to_int(conf, *str);
 176                 else
 177                         return(ret);
 178                 str++;
 179                 }
 180         }
 181 #endif
 182
 183 static unsigned long conf_value_hash(const CONF_VALUE *v)
 184         {
 185         return (lh_strhash(v->section)<<2)^lh_strhash(v->name);
 186         }
 187 static IMPLEMENT_LHASH_HASH_FN(conf_value, CONF_VALUE)
 188
 189 static int conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b)
 190         {
 191         int i;
 192
 193         if (a->section != b->section)
 194                 {
 195                 i=strcmp(a->section,b->section);
 196                 if (i) return(i);
 197                 }
 198
 199         if ((a->name != NULL) && (b->name != NULL))
 200                 {
 201                 i=strcmp(a->name,b->name);
 202                 return(i);
 203                 }
 204         else if (a->name == b->name)
 205                 return(0);
 206         else
 207                 return((a->name == NULL)?-1:1);
 208         }
 209 static IMPLEMENT_LHASH_COMP_FN(conf_value, CONF_VALUE)
 210
 211 int _CONF_new_data(CONF *conf)
 212         {
 213         if (conf == NULL)
 214                 {
 215                 return 0;
 216                 }
 217         if (conf->data == NULL)
 218                 if ((conf->data = lh_CONF_VALUE_new()) == NULL)
 219                         {
 220                         return 0;
 221                         }
 222         return 1;
 223         }
 224
 225 void _CONF_free_data(CONF *conf)
 226         {
 227         if (conf == NULL || conf->data == NULL) return;
 228
 229         lh_CONF_VALUE_down_load(conf->data)=0; /* evil thing to make
 230                                   * sure the 'OPENSSL_free()' works as
 231                                   * expected */
 232         lh_CONF_VALUE_doall_arg(conf->data, 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_arg(conf->data,
 239                                 LHASH_DOALL_ARG_FN(value_free_stack),
 240                                 LHASH_OF(CONF_VALUE), conf->data);
 241         lh_CONF_VALUE_free(conf->data);
 242         }
 243
 244 static void value_free_hash_doall_arg(CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf)
 245         {
 246         if (a->name != NULL)
 247                 lh_CONF_VALUE_delete(conf,a);
 248         }
 249
 250 static void value_free_stack_doall_arg(CONF_VALUE *a,
 251                                        LHASH_OF(CONF_VALUE) *conf)
 252         {
 253         CONF_VALUE *vv;
 254         STACK *sk;
 255         int i;
 256
 257         if (a->name != NULL) return;
 258
 259         sk=(STACK *)a->value;
 260         for (i=sk_num(sk)-1; i>=0; i--)
 261                 {
 262                 vv=(CONF_VALUE *)sk_value(sk,i);
 263                 OPENSSL_free(vv->value);
 264                 OPENSSL_free(vv->name);
 265                 OPENSSL_free(vv);
 266                 }
 267         if (sk != NULL) sk_free(sk);
 268         OPENSSL_free(a->section);
 269         OPENSSL_free(a);
 270         }
 271
 272 /* Up until OpenSSL 0.9.5a, this was new_section */
 273 CONF_VALUE *_CONF_new_section(CONF *conf, const char *section)
 274         {
 275         STACK *sk=NULL;
 276         int ok=0,i;
 277         CONF_VALUE *v=NULL,*vv;
 278
 279         if ((sk=sk_new_null()) == NULL)
 280                 goto err;
 281         if ((v=(CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))) == NULL)
 282                 goto err;
 283         i=strlen(section)+1;
 284         if ((v->section=(char *)OPENSSL_malloc(i)) == NULL)
 285                 goto err;
 286
 287         memcpy(v->section,section,i);
 288         v->name=NULL;
 289         v->value=(char *)sk;
 290
 291         vv=lh_CONF_VALUE_insert(conf->data,v);
 292         assert(vv == NULL);
 293         ok=1;
 294 err:
 295         if (!ok)
 296                 {
 297                 if (sk != NULL) sk_free(sk);
 298                 if (v != NULL) OPENSSL_free(v);
 299                 v=NULL;
 300                 }
 301         return(v);
 302         }
 303
 304 IMPLEMENT_STACK_OF(CONF_VALUE)