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/*
* Copyright 2000-2022 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "internal/e_os.h"
#include <stdio.h>
#include <string.h>
#include "internal/conf.h"
#include "crypto/ctype.h"
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/conf.h>
#include <openssl/conf_api.h>
#include "conf_local.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) {
ERR_raise(ERR_LIB_CONF, 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) {
ERR_raise(ERR_LIB_CONF, 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;
ERR_set_mark();
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);
}
ERR_pop_to_mark();
return status == 0 ? 0L : 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) {
ERR_raise(ERR_LIB_CONF, 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_ex(OSSL_LIB_CTX *libctx, CONF_METHOD *meth)
{
CONF *ret;
if (meth == NULL)
meth = NCONF_default();
ret = meth->create(meth);
if (ret == NULL) {
ERR_raise(ERR_LIB_CONF, ERR_R_MALLOC_FAILURE);
return NULL;
}
ret->libctx = libctx;
return ret;
}
CONF *NCONF_new(CONF_METHOD *meth)
{
return NCONF_new_ex(NULL, meth);
}
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);
}
OSSL_LIB_CTX *NCONF_get0_libctx(const CONF *conf)
{
return conf->libctx;
}
typedef STACK_OF(OPENSSL_CSTRING) SECTION_NAMES;
IMPLEMENT_LHASH_DOALL_ARG_CONST(CONF_VALUE, SECTION_NAMES);
static void collect_section_name(const CONF_VALUE *v, SECTION_NAMES *names)
{
/* A section is a CONF_VALUE with name == NULL */
if (v->name == NULL)
sk_OPENSSL_CSTRING_push(names, v->section);
}
static int section_name_cmp(OPENSSL_CSTRING const *a, OPENSSL_CSTRING const *b)
{
return strcmp(*a, *b);
}
STACK_OF(OPENSSL_CSTRING) *NCONF_get_section_names(const CONF *cnf)
{
SECTION_NAMES *names;
if ((names = sk_OPENSSL_CSTRING_new(section_name_cmp)) == NULL)
return NULL;
lh_CONF_VALUE_doall_SECTION_NAMES(cnf->data, collect_section_name, names);
sk_OPENSSL_CSTRING_sort(names);
return names;
}
int NCONF_load(CONF *conf, const char *file, long *eline)
{
if (conf == NULL) {
ERR_raise(ERR_LIB_CONF, 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) {
ERR_raise(ERR_LIB_CONF, 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) {
ERR_raise(ERR_LIB_CONF, 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) {
ERR_raise(ERR_LIB_CONF, CONF_R_NO_CONF);
return NULL;
}
if (section == NULL) {
ERR_raise(ERR_LIB_CONF, 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) {
ERR_raise(ERR_LIB_CONF, CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE);
return NULL;
}
ERR_raise_data(ERR_LIB_CONF, CONF_R_NO_VALUE,
"group=%s name=%s", group, name);
return NULL;
}
static int default_is_number(const CONF *conf, char c)
{
return ossl_isdigit(c);
}
static int default_to_int(const CONF *conf, char c)
{
return (int)(c - '0');
}
int NCONF_get_number_e(const CONF *conf, const char *group, const char *name,
long *result)
{
char *str;
long res;
int (*is_number)(const CONF *, char) = &default_is_number;
int (*to_int)(const CONF *, char) = &default_to_int;
if (result == NULL) {
ERR_raise(ERR_LIB_CONF, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
str = NCONF_get_string(conf, group, name);
if (str == NULL)
return 0;
if (conf != NULL) {
if (conf->meth->is_number != NULL)
is_number = conf->meth->is_number;
if (conf->meth->to_int != NULL)
to_int = conf->meth->to_int;
}
for (res = 0; is_number(conf, *str); str++) {
const int d = to_int(conf, *str);
if (res > (LONG_MAX - d) / 10L) {
ERR_raise(ERR_LIB_CONF, CONF_R_NUMBER_TOO_LARGE);
return 0;
}
res = res * 10 + d;
}
*result = res;
return 1;
}
long _CONF_get_number(const CONF *conf, const char *section,
const char *name)
{
int status;
long result = 0;
ERR_set_mark();
status = NCONF_get_number_e(conf, section, name, &result);
ERR_pop_to_mark();
return status == 0 ? 0L : result;
}
#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) {
ERR_raise(ERR_LIB_CONF, 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) {
ERR_raise(ERR_LIB_CONF, 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)
return NULL;
memset(ret, 0, sizeof(*ret));
ret->flags = DEFAULT_CONF_MFLAGS;
return ret;
}
#ifndef OPENSSL_NO_STDIO
int OPENSSL_INIT_set_config_filename(OPENSSL_INIT_SETTINGS *settings,
const char *filename)
{
char *newfilename = NULL;
if (filename != NULL) {
newfilename = strdup(filename);
if (newfilename == NULL)
return 0;
}
free(settings->filename);
settings->filename = newfilename;
return 1;
}
void OPENSSL_INIT_set_config_file_flags(OPENSSL_INIT_SETTINGS *settings,
unsigned long flags)
{
settings->flags = flags;
}
int OPENSSL_INIT_set_config_appname(OPENSSL_INIT_SETTINGS *settings,
const char *appname)
{
char *newappname = NULL;
if (appname != NULL) {
newappname = strdup(appname);
if (newappname == NULL)
return 0;
}
free(settings->appname);
settings->appname = newappname;
return 1;
}
#endif
void OPENSSL_INIT_free(OPENSSL_INIT_SETTINGS *settings)
{
free(settings->filename);
free(settings->appname);
free(settings);
}
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