conf_api.c

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/* conf_api.c */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * 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 ([email protected]).
 * 
 * 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 ([email protected])"
 *    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 ([email protected])"
 * 
 * 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 <stdlib.h>
#include <string.h>
#include <openssl/conf.h>
#include <openssl/conf_api.h>
#include "e_os.h"

static void value_free_hash_doall_arg(CONF_VALUE *a,
                      LHASH_OF(CONF_VALUE) *conf);
static void value_free_stack_doall(CONF_VALUE *a);
static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE,
                    LHASH_OF(CONF_VALUE))
static IMPLEMENT_LHASH_DOALL_FN(value_free_stack, CONF_VALUE)

/* 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=lh_CONF_VALUE_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 = lh_CONF_VALUE_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=lh_CONF_VALUE_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=lh_CONF_VALUE_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

static unsigned long conf_value_hash(const CONF_VALUE *v)
    {
    return (lh_strhash(v->section)<<2)^lh_strhash(v->name);
    }
static IMPLEMENT_LHASH_HASH_FN(conf_value, CONF_VALUE)

static int conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b)
    {
    int i;

    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);
    }
static IMPLEMENT_LHASH_COMP_FN(conf_value, CONF_VALUE)

int _CONF_new_data(CONF *conf)
    {
    if (conf == NULL)
        {
        return 0;
        }
    if (conf->data == NULL)
        if ((conf->data = lh_CONF_VALUE_new()) == NULL)
            {
            return 0;
            }
    return 1;
    }

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

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

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

    lh_CONF_VALUE_doall(conf->data, LHASH_DOALL_FN(value_free_stack));
    lh_CONF_VALUE_free(conf->data);
    }

static void value_free_hash_doall_arg(CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf)
    {
    if (a->name != NULL)
        (void)lh_CONF_VALUE_delete(conf,a);
    }

static void value_free_stack_doall(CONF_VALUE *a)
    {
    CONF_VALUE *vv;
    STACK_OF(CONF_VALUE) *sk;
    int i;

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

    sk=(STACK_OF(CONF_VALUE) *)a->value;
    for (i=sk_CONF_VALUE_num(sk)-1; i>=0; i--)
        {
        vv=sk_CONF_VALUE_value(sk,i);
        OPENSSL_free(vv->value);
        OPENSSL_free(vv->name);
        OPENSSL_free(vv);
        }
    if (sk != NULL) sk_CONF_VALUE_free(sk);
    OPENSSL_free(a->section);
    OPENSSL_free(a);
    }

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

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

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

IMPLEMENT_STACK_OF(CONF_VALUE)