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/* $OpenBSD: extra.c,v 1.1 1998/07/07 19:06:47 art Exp $ */
/* $KTH: extra.c,v 1.4 1998/06/03 03:24:09 joda Exp $ */
/*
* Copyright (c) 1998 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* 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 acknowledgement:
* This product includes software developed by Kungliga Tekniska
* Högskolan and its contributors.
*
* 4. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE 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.
*/
#include "krb_locl.h"
struct value {
char *variable;
char *value;
struct value *next;
};
static struct value *_extra_values;
static int _krb_extra_read = 0;
static int
define_variable(const char *variable, const char *value)
{
struct value *e;
e = malloc(sizeof(*e));
if(e == NULL)
return ENOMEM;
e->variable = strdup(variable);
if(e->variable == NULL) {
free(e);
return ENOMEM;
}
e->value = strdup(value);
if(e->value == NULL) {
free(e->variable);
free(e);
return ENOMEM;
}
e->next = _extra_values;
_extra_values = e;
}
#ifndef WIN32
struct obsolete {
const char *from;
const char *to;
} obsolete [] = {
{ "KDC_TIMESYNC", "kdc_timesync" },
{ "KRB_REVERSE_DIRECTION", "reverse_lsb_test"},
{ "krb4_proxy", "krb4_proxy"},
{ NULL, NULL }
};
static void
check_obsolete(void)
{
struct obsolete *r;
for(r = obsolete; r->from; r++) {
if(getenv(r->from)) {
krb_warning("The environment variable `%s' is obsolete;\n"
"set `%s' in your `krb.extra' file instead\n",
r->from, r->to);
define_variable(r->to, getenv(r->from));
}
}
}
static int
read_extra_file(void)
{
int i = 0;
char file[128];
char line[1024];
if(_krb_extra_read)
return 0;
_krb_extra_read = 1;
check_obsolete();
while(krb_get_krbextra(i++, file, sizeof(file)) == 0) {
FILE *f = fopen(file, "r");
if(f == NULL)
continue;
while(fgets(line, sizeof(line), f)) {
char *save = NULL;
char *var, *tmp, *val;
/* skip initial whitespace */
var = line + strspn(line, " \t");
/* skip non-whitespace */
tmp = var + strcspn(var, " \t=");
/* skip whitespace */
val = tmp + strspn(tmp, " \t=");
*tmp = '\0';
tmp = val + strcspn(val, " \t\n");
*tmp = '\0';
if(*var == '\0' || *var == '#' || *val == '\0')
continue;
if(krb_debug)
krb_warning("%s: setting `%s' to `%s'\n", file, var, val);
define_variable(var, val);
}
fclose(f);
return 0;
}
return ENOENT;
}
#else /* WIN32 */
static int
read_extra_file(void)
{
char name[1024], data[1024];
DWORD name_sz, data_sz;
DWORD type;
int num = 0;
HKEY reg_key;
if(_krb_extra_read)
return 0;
_krb_extra_read = 1;
if(RegCreateKey(HKEY_CURRENT_USER, "krb4", ®_key) != 0)
return -1;
while(1) {
name_sz = sizeof(name);
data_sz = sizeof(data);
if(RegEnumValue(reg_key,
num++,
name,
&name_sz,
NULL,
&type,
data,
&data_sz) != 0)
break;
if(type == REG_SZ)
define_variable(name, data);
}
RegCloseKey(reg_key);
return 0;
}
#endif
static const char*
find_variable(const char *variable)
{
struct value *e;
for(e = _extra_values; e; e = e->next) {
if(strcasecmp(variable, e->variable) == 0)
return e->value;
}
return NULL;
}
const char *
krb_get_config_string(const char *variable)
{
read_extra_file();
return find_variable(variable);
}
int
krb_get_config_bool(const char *variable)
{
const char *value = krb_get_config_string(variable);
if(value == NULL)
return 0;
return strcasecmp(value, "yes") == 0 ||
strcasecmp(value, "true") == 0 ||
atoi(value);
}
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