turn off v4 conversion stuff
[heimdal.git] / lib / krb5 / get_default_principal.c
blob82d0642934f909c2b0476093b5e19c3398a80474
1 /*
2 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
34 #include "krb5_locl.h"
37 * Try to find out what's a reasonable default principal.
40 static const char*
41 get_env_user(void)
43 const char *user = getenv("USER");
44 if(user == NULL)
45 user = getenv("LOGNAME");
46 if(user == NULL)
47 user = getenv("USERNAME");
48 return user;
52 * Will only use operating-system dependant operation to get the
53 * default principal, for use of functions that in ccache layer to
54 * avoid recursive calls.
57 krb5_error_code
58 _krb5_get_default_principal_local (krb5_context context,
59 krb5_principal *princ)
61 krb5_error_code ret;
62 const char *user;
63 uid_t uid;
65 *princ = NULL;
67 uid = getuid();
68 if(uid == 0) {
69 user = getlogin();
70 if(user == NULL)
71 user = get_env_user();
72 if(user != NULL && strcmp(user, "root") != 0)
73 ret = krb5_make_principal(context, princ, NULL, user, "root", NULL);
74 else
75 ret = krb5_make_principal(context, princ, NULL, "root", NULL);
76 } else {
77 struct passwd *pw = getpwuid(uid);
78 if(pw != NULL)
79 user = pw->pw_name;
80 else {
81 user = get_env_user();
82 if(user == NULL)
83 user = getlogin();
85 if(user == NULL) {
86 krb5_set_error_message(context, ENOTTY,
87 N_("unable to figure out current "
88 "principal", ""));
89 return ENOTTY; /* XXX */
91 ret = krb5_make_principal(context, princ, NULL, user, NULL);
93 return ret;
96 krb5_error_code KRB5_LIB_FUNCTION
97 krb5_get_default_principal (krb5_context context,
98 krb5_principal *princ)
100 krb5_error_code ret;
101 krb5_ccache id;
103 *princ = NULL;
105 ret = krb5_cc_default (context, &id);
106 if (ret == 0) {
107 ret = krb5_cc_get_principal (context, id, princ);
108 krb5_cc_close (context, id);
109 if (ret == 0)
110 return 0;
113 return _krb5_get_default_principal_local(context, princ);