109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
/*
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* Copyright (c) 1997 - 1999 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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RCSID("$Id: kuserok.c,v 1.5 1999/12/02 17:05:11 joda Exp $");
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/*
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* Return TRUE iff `principal' is allowed to login as `luser'.
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*/
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krb5_boolean
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krb5_kuserok (krb5_context context,
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krb5_principal principal,
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const char *luser)
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{
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char buf[BUFSIZ];
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struct passwd *pwd;
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FILE *f;
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krb5_realm *realms, *r;
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krb5_error_code ret;
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krb5_boolean b;
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ret = krb5_get_default_realms (context, &realms);
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if (ret)
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return FALSE;
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for (r = realms; *r != NULL; ++r) {
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krb5_principal local_principal;
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ret = krb5_build_principal (context,
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&local_principal,
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strlen(*r),
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*r,
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luser,
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NULL);
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if (ret) {
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krb5_free_host_realm (context, realms);
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return FALSE;
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}
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b = krb5_principal_compare (context, principal, local_principal);
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krb5_free_principal (context, local_principal);
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if (b) {
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krb5_free_host_realm (context, realms);
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return TRUE;
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}
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}
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krb5_free_host_realm (context, realms);
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pwd = getpwnam (luser); /* XXX - Should use k_getpwnam? */
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if (pwd == NULL)
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return FALSE;
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snprintf (buf, sizeof(buf), "%s/.k5login", pwd->pw_dir);
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f = fopen (buf, "r");
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if (f == NULL)
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return FALSE;
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while (fgets (buf, sizeof(buf), f) != NULL) {
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krb5_principal tmp;
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if(buf[strlen(buf) - 1] == '\n')
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buf[strlen(buf) - 1] = '\0';
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ret = krb5_parse_name (context, buf, &tmp);
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if (ret) {
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fclose (f);
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return FALSE;
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}
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b = krb5_principal_compare (context, principal, tmp);
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krb5_free_principal (context, tmp);
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if (b) {
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fclose (f);
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return TRUE;
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}
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}
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fclose (f);
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return FALSE;
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}
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