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conf_api.c

/* conf_api.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

/* Part of the code in here was originally in conf.c, which is now removed */

#ifndef CONF_DEBUG
# undef NDEBUG /* avoid conflicting definitions */
# define NDEBUG
#endif

#include <assert.h>
#include <string.h>
#include <openssl/conf.h>
#include <openssl/conf_api.h>
#include "e_os.h"

static void value_free_hash(CONF_VALUE *a, LHASH *conf);
static void value_free_stack(CONF_VALUE *a,LHASH *conf);
static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE *, LHASH *)
static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_stack, CONF_VALUE *, LHASH *)
/* We don't use function pointer casting or wrapper functions - but cast each
 * callback parameter inside the callback functions. */
/* static unsigned long hash(CONF_VALUE *v); */
static unsigned long hash(const void *v_void);
/* static int cmp_conf(CONF_VALUE *a,CONF_VALUE *b); */
static int cmp_conf(const void *a_void,const void *b_void);

/* Up until OpenSSL 0.9.5a, this was get_section */
CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section)
      {
      CONF_VALUE *v,vv;

      if ((conf == NULL) || (section == NULL)) return(NULL);
      vv.name=NULL;
      vv.section=(char *)section;
      v=(CONF_VALUE *)lh_retrieve(conf->data,&vv);
      return(v);
      }

/* Up until OpenSSL 0.9.5a, this was CONF_get_section */
STACK_OF(CONF_VALUE) *_CONF_get_section_values(const CONF *conf,
                                     const char *section)
      {
      CONF_VALUE *v;

      v=_CONF_get_section(conf,section);
      if (v != NULL)
            return((STACK_OF(CONF_VALUE) *)v->value);
      else
            return(NULL);
      }

int _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value)
      {
      CONF_VALUE *v = NULL;
      STACK_OF(CONF_VALUE) *ts;

      ts = (STACK_OF(CONF_VALUE) *)section->value;

      value->section=section->section;    
      if (!sk_CONF_VALUE_push(ts,value))
            {
            return 0;
            }

      v = (CONF_VALUE *)lh_insert(conf->data, value);
      if (v != NULL)
            {
            (void)sk_CONF_VALUE_delete_ptr(ts,v);
            OPENSSL_free(v->name);
            OPENSSL_free(v->value);
            OPENSSL_free(v);
            }
      return 1;
      }

char *_CONF_get_string(const CONF *conf, const char *section, const char *name)
      {
      CONF_VALUE *v,vv;
      char *p;

      if (name == NULL) return(NULL);
      if (conf != NULL)
            {
            if (section != NULL)
                  {
                  vv.name=(char *)name;
                  vv.section=(char *)section;
                  v=(CONF_VALUE *)lh_retrieve(conf->data,&vv);
                  if (v != NULL) return(v->value);
                  if (strcmp(section,"ENV") == 0)
                        {
                        p=Getenv(name);
                        if (p != NULL) return(p);
                        }
                  }
            vv.section="default";
            vv.name=(char *)name;
            v=(CONF_VALUE *)lh_retrieve(conf->data,&vv);
            if (v != NULL)
                  return(v->value);
            else
                  return(NULL);
            }
      else
            return(Getenv(name));
      }

#if 0 /* There's no way to provide error checking with this function, so
       force implementors of the higher levels to get a string and read
       the number themselves. */
long _CONF_get_number(CONF *conf, char *section, char *name)
      {
      char *str;
      long ret=0;

      str=_CONF_get_string(conf,section,name);
      if (str == NULL) return(0);
      for (;;)
            {
            if (conf->meth->is_number(conf, *str))
                  ret=ret*10+conf->meth->to_int(conf, *str);
            else
                  return(ret);
            str++;
            }
      }
#endif

int _CONF_new_data(CONF *conf)
      {
      if (conf == NULL)
            {
            return 0;
            }
      if (conf->data == NULL)
            if ((conf->data = lh_new(hash, cmp_conf)) == NULL)
                  {
                  return 0;
                  }
      return 1;
      }

void _CONF_free_data(CONF *conf)
      {
      if (conf == NULL || conf->data == NULL) return;

      conf->data->down_load=0; /* evil thing to make sure the 'OPENSSL_free()'
                          * works as expected */
      lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(value_free_hash),
                  conf->data);

      /* We now have only 'section' entries in the hash table.
       * Due to problems with */

      lh_doall_arg(conf->data, LHASH_DOALL_ARG_FN(value_free_stack),
                  conf->data);
      lh_free(conf->data);
      }

static void value_free_hash(CONF_VALUE *a, LHASH *conf)
      {
      if (a->name != NULL)
            {
            a=(CONF_VALUE *)lh_delete(conf,a);
            }
      }

static void value_free_stack(CONF_VALUE *a, LHASH *conf)
      {
      CONF_VALUE *vv;
      STACK *sk;
      int i;

      if (a->name != NULL) return;

      sk=(STACK *)a->value;
      for (i=sk_num(sk)-1; i>=0; i--)
            {
            vv=(CONF_VALUE *)sk_value(sk,i);
            OPENSSL_free(vv->value);
            OPENSSL_free(vv->name);
            OPENSSL_free(vv);
            }
      if (sk != NULL) sk_free(sk);
      OPENSSL_free(a->section);
      OPENSSL_free(a);
      }

/* static unsigned long hash(CONF_VALUE *v) */
static unsigned long hash(const void *v_void)
      {
      CONF_VALUE *v = (CONF_VALUE *)v_void;
      return((lh_strhash(v->section)<<2)^lh_strhash(v->name));
      }

/* static int cmp_conf(CONF_VALUE *a, CONF_VALUE *b) */
static int cmp_conf(const void *a_void,const  void *b_void)
      {
      int i;
      CONF_VALUE *a = (CONF_VALUE *)a_void;
      CONF_VALUE *b = (CONF_VALUE *)b_void;

      if (a->section != b->section)
            {
            i=strcmp(a->section,b->section);
            if (i) return(i);
            }

      if ((a->name != NULL) && (b->name != NULL))
            {
            i=strcmp(a->name,b->name);
            return(i);
            }
      else if (a->name == b->name)
            return(0);
      else
            return((a->name == NULL)?-1:1);
      }

/* Up until OpenSSL 0.9.5a, this was new_section */
CONF_VALUE *_CONF_new_section(CONF *conf, const char *section)
      {
      STACK *sk=NULL;
      int ok=0,i;
      CONF_VALUE *v=NULL,*vv;

      if ((sk=sk_new_null()) == NULL)
            goto err;
      if ((v=(CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))) == NULL)
            goto err;
      i=strlen(section)+1;
      if ((v->section=(char *)OPENSSL_malloc(i)) == NULL)
            goto err;

      memcpy(v->section,section,i);
      v->name=NULL;
      v->value=(char *)sk;
      
      vv=(CONF_VALUE *)lh_insert(conf->data,v);
      assert(vv == NULL);
      ok=1;
err:
      if (!ok)
            {
            if (sk != NULL) sk_free(sk);
            if (v != NULL) OPENSSL_free(v);
            v=NULL;
            }
      return(v);
      }

IMPLEMENT_STACK_OF(CONF_VALUE)

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