99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
/*
|
|
* Copyright (c) 1997 - 2001 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. 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 "krb5_locl.h"
|
|
|
|
RCSID("$Id: get_default_principal.c,v 1.7 2001/05/14 06:14:46 assar Exp $");
|
|
|
|
/*
|
|
* Try to find out what's a reasonable default principal.
|
|
*/
|
|
|
|
static const char*
|
|
get_env_user(void)
|
|
{
|
|
const char *user = getenv("USER");
|
|
if(user == NULL)
|
|
user = getenv("LOGNAME");
|
|
if(user == NULL)
|
|
user = getenv("USERNAME");
|
|
return user;
|
|
}
|
|
|
|
krb5_error_code
|
|
krb5_get_default_principal (krb5_context context,
|
|
krb5_principal *princ)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_ccache id;
|
|
const char *user;
|
|
uid_t uid;
|
|
|
|
ret = krb5_cc_default (context, &id);
|
|
if (ret == 0) {
|
|
ret = krb5_cc_get_principal (context, id, princ);
|
|
krb5_cc_close (context, id);
|
|
if (ret == 0)
|
|
return 0;
|
|
}
|
|
|
|
|
|
uid = getuid();
|
|
if(uid == 0) {
|
|
user = getlogin();
|
|
if(user == NULL)
|
|
user = get_env_user();
|
|
if(user != NULL && strcmp(user, "root") != 0)
|
|
ret = krb5_make_principal(context, princ, NULL, user, "root", NULL);
|
|
else
|
|
ret = krb5_make_principal(context, princ, NULL, "root", NULL);
|
|
} else {
|
|
struct passwd *pw = getpwuid(uid);
|
|
if(pw != NULL)
|
|
user = pw->pw_name;
|
|
else {
|
|
user = get_env_user();
|
|
if(user == NULL)
|
|
user = getlogin();
|
|
}
|
|
if(user == NULL) {
|
|
krb5_set_error_string(context,
|
|
"unable to figure out current principal");
|
|
return ENOTTY; /* XXX */
|
|
}
|
|
ret = krb5_make_principal(context, princ, NULL, user, NULL);
|
|
}
|
|
|
|
return ret;
|
|
}
|