/* $OpenBSD: conf_lib.c,v 1.15 2017/01/29 17:49:22 beck Exp $ */

/* Written by Richard Levitte (richard@levitte.org) for the OpenSSL

 * project 2000.

 */

/* ====================================================================

 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.

 *

 * 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 above 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 acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    licensing@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED 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 OpenSSL PROJECT OR

 * ITS 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.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#include <stdio.h>

#include <openssl/crypto.h>

#include <openssl/err.h>

#include <openssl/conf.h>

#include <openssl/conf_api.h>

#include <openssl/lhash.h>

static CONF_METHOD *default_CONF_method = NULL;

/* Init a 'CONF' structure from an old LHASH */

void

CONF_set_nconf(CONF *conf, LHASH_OF(CONF_VALUE) *hash)

{

  if (default_CONF_method == NULL)

    default_CONF_method = NCONF_default();

  default_CONF_method->init(conf);

  conf->data = hash;

}

/* The following section contains the "CONF classic" functions,

   rewritten in terms of the new CONF interface. */

int

CONF_set_default_method(CONF_METHOD *meth)

{

  default_CONF_method = meth;

  return 1;

}

LHASH_OF(CONF_VALUE) *CONF_load(LHASH_OF(CONF_VALUE) *conf, const char *file,

    long *eline)

{

  LHASH_OF(CONF_VALUE) *ltmp;

  BIO *in = NULL;

  in = BIO_new_file(file, "rb");

  if (in == NULL) {

    CONFerror(ERR_R_SYS_LIB);

    return NULL;

  }

  ltmp = CONF_load_bio(conf, in, eline);

  BIO_free(in);

  return ltmp;

}

LHASH_OF(CONF_VALUE) *CONF_load_fp(LHASH_OF(CONF_VALUE) *conf, FILE *fp,

    long *eline)

{

  BIO *btmp;

  LHASH_OF(CONF_VALUE) *ltmp;

  if (!(btmp = BIO_new_fp(fp, BIO_NOCLOSE))) {

    CONFerror(ERR_R_BUF_LIB);

    return NULL;

  }

  ltmp = CONF_load_bio(conf, btmp, eline);

  BIO_free(btmp);

  return ltmp;

}

LHASH_OF(CONF_VALUE) *CONF_load_bio(LHASH_OF(CONF_VALUE) *conf, BIO *bp,

    long *eline)

{

  CONF ctmp;

  int ret;

  CONF_set_nconf(&ctmp, conf);

  ret = NCONF_load_bio(&ctmp, bp, eline);

  if (ret)

    return ctmp.data;

  return NULL;

}

STACK_OF(CONF_VALUE) *CONF_get_section(LHASH_OF(CONF_VALUE) *conf,

    const char *section)

{

  if (conf == NULL) {

    return NULL;

  } else {

    CONF ctmp;

    CONF_set_nconf(&ctmp, conf);

    return NCONF_get_section(&ctmp, section);

  }

}

char *

CONF_get_string(LHASH_OF(CONF_VALUE) *conf, const char *group,

    const char *name)

{

  if (conf == NULL) {

    return NCONF_get_string(NULL, group, name);

  } else {

    CONF ctmp;

    CONF_set_nconf(&ctmp, conf);

    return NCONF_get_string(&ctmp, group, name);

  }

}

long

CONF_get_number(LHASH_OF(CONF_VALUE) *conf, const char *group,

    const char *name)

{

  int status;

  long result = 0;

  if (conf == NULL) {

    status = NCONF_get_number_e(NULL, group, name, &result);

  } else {

    CONF ctmp;

    CONF_set_nconf(&ctmp, conf);

    status = NCONF_get_number_e(&ctmp, group, name, &result);

  }

  if (status == 0) {

    /* This function does not believe in errors... */

    ERR_clear_error();

  }

  return result;

}

void

CONF_free(LHASH_OF(CONF_VALUE) *conf)

{

  CONF ctmp;

  CONF_set_nconf(&ctmp, conf);

  NCONF_free_data(&ctmp);

}

int

CONF_dump_fp(LHASH_OF(CONF_VALUE) *conf, FILE *out)

{

  BIO *btmp;

  int ret;

  if (!(btmp = BIO_new_fp(out, BIO_NOCLOSE))) {

    CONFerror(ERR_R_BUF_LIB);

    return 0;

  }

  ret = CONF_dump_bio(conf, btmp);

  BIO_free(btmp);

  return ret;

}

int

CONF_dump_bio(LHASH_OF(CONF_VALUE) *conf, BIO *out)

{

  CONF ctmp;

  CONF_set_nconf(&ctmp, conf);

  return NCONF_dump_bio(&ctmp, out);

}

/* The following section contains the "New CONF" functions.  They are

   completely centralised around a new CONF structure that may contain

   basically anything, but at least a method pointer and a table of data.

   These functions are also written in terms of the bridge functions used

   by the "CONF classic" functions, for consistency.  */

CONF *

NCONF_new(CONF_METHOD *meth)

{

  CONF *ret;

  if (meth == NULL)

    meth = NCONF_default();

  ret = meth->create(meth);

  if (ret == NULL) {

    CONFerror(ERR_R_MALLOC_FAILURE);

    return (NULL);

  }

  return ret;

}

void

NCONF_free(CONF *conf)

{

  if (conf == NULL)

    return;

  conf->meth->destroy(conf);

}

void

NCONF_free_data(CONF *conf)

{

  if (conf == NULL)

    return;

  conf->meth->destroy_data(conf);

}

int

NCONF_load(CONF *conf, const char *file, long *eline)

{

  if (conf == NULL) {

    CONFerror(CONF_R_NO_CONF);

    return 0;

  }

  return conf->meth->load(conf, file, eline);

}

int

NCONF_load_fp(CONF *conf, FILE *fp, long *eline)

{

  BIO *btmp;

  int ret;

  if (!(btmp = BIO_new_fp(fp, BIO_NOCLOSE))) {

    CONFerror(ERR_R_BUF_LIB);

    return 0;

  }

  ret = NCONF_load_bio(conf, btmp, eline);

  BIO_free(btmp);

  return ret;

}

int

NCONF_load_bio(CONF *conf, BIO *bp, long *eline)

{

  if (conf == NULL) {

    CONFerror(CONF_R_NO_CONF);

    return 0;

  }

  return conf->meth->load_bio(conf, bp, eline);

}

STACK_OF(CONF_VALUE) *

NCONF_get_section(const CONF *conf, const char *section)

{

  if (conf == NULL) {

    CONFerror(CONF_R_NO_CONF);

    return NULL;

  }

  if (section == NULL) {

    CONFerror(CONF_R_NO_SECTION);

    return NULL;

  }

  return _CONF_get_section_values(conf, section);

}

char *

NCONF_get_string(const CONF *conf, const char *group, const char *name)

{

  char *s = _CONF_get_string(conf, group, name);

        /* Since we may get a value from an environment variable even

           if conf is NULL, let's check the value first */

  if (s)

    return s;

  if (conf == NULL) {

    CONFerror(CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE);

    return NULL;

  }

  CONFerror(CONF_R_NO_VALUE);

  ERR_asprintf_error_data("group=%s name=%s",

      group ? group : "", name);

  return NULL;

}

int

NCONF_get_number_e(const CONF *conf, const char *group, const char *name,

    long *result)

{

  char *str;

  if (result == NULL) {

    CONFerror(ERR_R_PASSED_NULL_PARAMETER);

    return 0;

  }

  str = NCONF_get_string(conf, group, name);

  if (str == NULL)

    return 0;

  for (*result = 0; conf->meth->is_number(conf, *str); ) {

    *result = (*result) * 10 + conf->meth->to_int(conf, *str);

    str++;

  }

  return 1;

}

int

NCONF_dump_fp(const CONF *conf, FILE *out)

{

  BIO *btmp;

  int ret;

  if (!(btmp = BIO_new_fp(out, BIO_NOCLOSE))) {

    CONFerror(ERR_R_BUF_LIB);

    return 0;

  }

  ret = NCONF_dump_bio(conf, btmp);

  BIO_free(btmp);

  return ret;

}

int

NCONF_dump_bio(const CONF *conf, BIO *out)

{

  if (conf == NULL) {

    CONFerror(CONF_R_NO_CONF);

    return 0;

  }

  return conf->meth->dump(conf, out);

}