openssl/crypto/conf/conf_lib.c
Rich Salz 143e5e50f2 Check malloc
Noticed by Claus Assmann <ca+ssl-dev@esmtp.org>

Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-11 09:21:35 -05:00

402 lines
10 KiB
C

/*
* 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 <string.h>
#include <internal/conf.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;
#ifdef OPENSSL_SYS_VMS
in = BIO_new_file(file, "r");
#else
in = BIO_new_file(file, "rb");
#endif
if (in == NULL) {
CONFerr(CONF_F_CONF_LOAD, ERR_R_SYS_LIB);
return NULL;
}
ltmp = CONF_load_bio(conf, in, eline);
BIO_free(in);
return ltmp;
}
#ifndef OPENSSL_NO_STDIO
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)) == NULL) {
CONFerr(CONF_F_CONF_LOAD_FP, ERR_R_BUF_LIB);
return NULL;
}
ltmp = CONF_load_bio(conf, btmp, eline);
BIO_free(btmp);
return ltmp;
}
#endif
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);
}
#ifndef OPENSSL_NO_STDIO
int CONF_dump_fp(LHASH_OF(CONF_VALUE) *conf, FILE *out)
{
BIO *btmp;
int ret;
if ((btmp = BIO_new_fp(out, BIO_NOCLOSE)) == NULL) {
CONFerr(CONF_F_CONF_DUMP_FP, ERR_R_BUF_LIB);
return 0;
}
ret = CONF_dump_bio(conf, btmp);
BIO_free(btmp);
return ret;
}
#endif
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) {
CONFerr(CONF_F_NCONF_NEW, 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) {
CONFerr(CONF_F_NCONF_LOAD, CONF_R_NO_CONF);
return 0;
}
return conf->meth->load(conf, file, eline);
}
#ifndef OPENSSL_NO_STDIO
int NCONF_load_fp(CONF *conf, FILE *fp, long *eline)
{
BIO *btmp;
int ret;
if ((btmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
CONFerr(CONF_F_NCONF_LOAD_FP, ERR_R_BUF_LIB);
return 0;
}
ret = NCONF_load_bio(conf, btmp, eline);
BIO_free(btmp);
return ret;
}
#endif
int NCONF_load_bio(CONF *conf, BIO *bp, long *eline)
{
if (conf == NULL) {
CONFerr(CONF_F_NCONF_LOAD_BIO, 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) {
CONFerr(CONF_F_NCONF_GET_SECTION, CONF_R_NO_CONF);
return NULL;
}
if (section == NULL) {
CONFerr(CONF_F_NCONF_GET_SECTION, 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) {
CONFerr(CONF_F_NCONF_GET_STRING,
CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE);
return NULL;
}
CONFerr(CONF_F_NCONF_GET_STRING, CONF_R_NO_VALUE);
ERR_add_error_data(4, "group=", group, " name=", name);
return NULL;
}
int NCONF_get_number_e(const CONF *conf, const char *group, const char *name,
long *result)
{
char *str;
if (result == NULL) {
CONFerr(CONF_F_NCONF_GET_NUMBER_E, 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;
}
#ifndef OPENSSL_NO_STDIO
int NCONF_dump_fp(const CONF *conf, FILE *out)
{
BIO *btmp;
int ret;
if ((btmp = BIO_new_fp(out, BIO_NOCLOSE)) == NULL) {
CONFerr(CONF_F_NCONF_DUMP_FP, ERR_R_BUF_LIB);
return 0;
}
ret = NCONF_dump_bio(conf, btmp);
BIO_free(btmp);
return ret;
}
#endif
int NCONF_dump_bio(const CONF *conf, BIO *out)
{
if (conf == NULL) {
CONFerr(CONF_F_NCONF_DUMP_BIO, CONF_R_NO_CONF);
return 0;
}
return conf->meth->dump(conf, out);
}
/*
* These routines call the C malloc/free, to avoid intermixing with
* OpenSSL function pointers before the library is initialized.
*/
OPENSSL_INIT_SETTINGS *OPENSSL_INIT_new(void)
{
OPENSSL_INIT_SETTINGS *ret = malloc(sizeof(*ret));
if (ret != NULL)
memset(ret, 0, sizeof(*ret));
return ret;
}
void OPENSSL_INIT_set_config_filename(OPENSSL_INIT_SETTINGS *settings,
const char *config_file)
{
free(settings->config_name);
settings->config_name = config_file == NULL ? NULL : strdup(config_file);
}
void OPENSSL_INIT_free(OPENSSL_INIT_SETTINGS *settings)
{
free(settings->config_name);
free(settings);
}