crypto/openssl-0.9.7d/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(CONF_VALUE *a, LHASH *conf);
  73 static void value_free_stack(CONF_VALUE *a,LHASH *conf);
  74 static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE *, LHASH *)
  75 static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_stack, CONF_VALUE *, LHASH *)
  76 /* We don't use function pointer casting or wrapper functions - but cast each
  77  * callback parameter inside the callback functions. */
  78 /* static unsigned long hash(CONF_VALUE *v); */
  79 static unsigned long hash(const void *v_void);
  80 /* static int cmp_conf(CONF_VALUE *a,CONF_VALUE *b); */
  81 static int cmp_conf(const void *a_void,const void *b_void);
  82
  83 /* Up until OpenSSL 0.9.5a, this was get_section */
  84 CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section)
  85         {
  86         CONF_VALUE *v,vv;
  87
  88         if ((conf == NULL) || (section == NULL)) return(NULL);
  89         vv.name=NULL;
  90         vv.section=(char *)section;
  91         v=(CONF_VALUE *)lh_retrieve(conf->data,&vv);
  92         return(v);
  93         }
  94
  95 /* Up until OpenSSL 0.9.5a, this was CONF_get_section */
  96 STACK_OF(CONF_VALUE) *_CONF_get_section_values(const CONF *conf,
  97                                                const char *section)
  98         {
  99         CONF_VALUE *v;
 100
 101         v=_CONF_get_section(conf,section);
 102         if (v != NULL)
 103                 return((STACK_OF(CONF_VALUE) *)v->value);
 104         else
 105                 return(NULL);
 106         }
 107
 108 int _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value)
 109         {
 110         CONF_VALUE *v = NULL;
 111         STACK_OF(CONF_VALUE) *ts;
 112
 113         ts = (STACK_OF(CONF_VALUE) *)section->value;
 114
 115         value->section=section->section;
 116         if (!sk_CONF_VALUE_push(ts,value))
 117                 {
 118                 return 0;
 119                 }
 120
 121         v = (CONF_VALUE *)lh_insert(conf->data, value);
 122         if (v != NULL)
 123                 {
 124                 sk_CONF_VALUE_delete_ptr(ts,v);
 125                 OPENSSL_free(v->name);
 126                 OPENSSL_free(v->value);
 127                 OPENSSL_free(v);
 128                 }
 129         return 1;
 130         }
 131
 132 char *_CONF_get_string(const CONF *conf, const char *section, const char *name)
 133         {
 134         CONF_VALUE *v,vv;
 135         char *p;
 136
 137         if (name == NULL) return(NULL);
 138         if (conf != NULL)
 139                 {
 140                 if (section != NULL)
 141                         {
 142                         vv.name=(char *)name;
 143                         vv.section=(char *)section;
 144                         v=(CONF_VALUE *)lh_retrieve(conf->data,&vv);
 145                         if (v != NULL) return(v->value);
 146                         if (strcmp(section,"ENV") == 0)
 147                                 {
 148                                 p=Getenv(name);
 149                                 if (p != NULL) return(p);
 150                                 }
 151                         }
 152                 vv.section="default";
 153                 vv.name=(char *)name;
 154                 v=(CONF_VALUE *)lh_retrieve(conf->data,&vv);
 155                 if (v != NULL)
 156                         return(v->value);
 157                 else
 158                         return(NULL);
 159                 }
 160         else
 161                 return(Getenv(name));
 162         }
 163
 164 #if 0 /* There's no way to provide error checking with this function, so
 165          force implementors of the higher levels to get a string and read
 166          the number themselves. */
 167 long _CONF_get_number(CONF *conf, char *section, char *name)
 168         {
 169         char *str;
 170         long ret=0;
 171
 172         str=_CONF_get_string(conf,section,name);
 173         if (str == NULL) return(0);
 174         for (;;)
 175                 {
 176                 if (conf->meth->is_number(conf, *str))
 177                         ret=ret*10+conf->meth->to_int(conf, *str);
 178                 else
 179                         return(ret);
 180                 str++;
 181                 }
 182         }
 183 #endif
 184
 185 int _CONF_new_data(CONF *conf)
 186         {
 187         if (conf == NULL)
 188                 {
 189                 return 0;
 190                 }
 191         if (conf->data == NULL)
 192                 if ((conf->data = lh_new(hash, cmp_conf)) == NULL)
 193                         {
 194                         return 0;
 195                         }
 196         return 1;
 197         }
 198
 199 void _CONF_free_data(CONF *conf)
 200         {
 201         if (conf == NULL || conf->data == NULL) return;
 202
 203         conf->data->down_load=0; /* evil thing to make sure the 'OPENSSL_free()'
 204                                   * works as expected */
 205         lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(value_free_hash),
 206                         conf->data);
 207
 208         /* We now have only 'section' entries in the hash table.
 209          * Due to problems with */
 210
 211         lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(value_free_stack),
 212                         conf->data);
 213         lh_free(conf->data);
 214         }
 215
 216 static void value_free_hash(CONF_VALUE *a, LHASH *conf)
 217         {
 218         if (a->name != NULL)
 219                 {
 220                 a=(CONF_VALUE *)lh_delete(conf,a);
 221                 }
 222         }
 223
 224 static void value_free_stack(CONF_VALUE *a, LHASH *conf)
 225         {
 226         CONF_VALUE *vv;
 227         STACK *sk;
 228         int i;
 229
 230         if (a->name != NULL) return;
 231
 232         sk=(STACK *)a->value;
 233         for (i=sk_num(sk)-1; i>=0; i--)
 234                 {
 235                 vv=(CONF_VALUE *)sk_value(sk,i);
 236                 OPENSSL_free(vv->value);
 237                 OPENSSL_free(vv->name);
 238                 OPENSSL_free(vv);
 239                 }
 240         if (sk != NULL) sk_free(sk);
 241         OPENSSL_free(a->section);
 242         OPENSSL_free(a);
 243         }
 244
 245 /* static unsigned long hash(CONF_VALUE *v) */
 246 static unsigned long hash(const void *v_void)
 247         {
 248         CONF_VALUE *v = (CONF_VALUE *)v_void;
 249         return((lh_strhash(v->section)<<2)^lh_strhash(v->name));
 250         }
 251
 252 /* static int cmp_conf(CONF_VALUE *a, CONF_VALUE *b) */
 253 static int cmp_conf(const void *a_void,const  void *b_void)
 254         {
 255         int i;
 256         CONF_VALUE *a = (CONF_VALUE *)a_void;
 257         CONF_VALUE *b = (CONF_VALUE *)b_void;
 258
 259         if (a->section != b->section)
 260                 {
 261                 i=strcmp(a->section,b->section);
 262                 if (i) return(i);
 263                 }
 264
 265         if ((a->name != NULL) && (b->name != NULL))
 266                 {
 267                 i=strcmp(a->name,b->name);
 268                 return(i);
 269                 }
 270         else if (a->name == b->name)
 271                 return(0);
 272         else
 273                 return((a->name == NULL)?-1:1);
 274         }
 275
 276 /* Up until OpenSSL 0.9.5a, this was new_section */
 277 CONF_VALUE *_CONF_new_section(CONF *conf, const char *section)
 278         {
 279         STACK *sk=NULL;
 280         int ok=0,i;
 281         CONF_VALUE *v=NULL,*vv;
 282
 283         if ((sk=sk_new_null()) == NULL)
 284                 goto err;
 285         if ((v=(CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))) == NULL)
 286                 goto err;
 287         i=strlen(section)+1;
 288         if ((v->section=(char *)OPENSSL_malloc(i)) == NULL)
 289                 goto err;
 290
 291         memcpy(v->section,section,i);
 292         v->name=NULL;
 293         v->value=(char *)sk;
 294
 295         vv=(CONF_VALUE *)lh_insert(conf->data,v);
 296         assert(vv == NULL);
 297         ok=1;
 298 err:
 299         if (!ok)
 300                 {
 301                 if (sk != NULL) sk_free(sk);
 302                 if (v != NULL) OPENSSL_free(v);
 303                 v=NULL;
 304                 }
 305         return(v);
 306         }
 307
 308 IMPLEMENT_STACK_OF(CONF_VALUE)