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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/krb5/os/localauth_names.c - names localauth module */
/*
* Copyright (C) 2013 by the Massachusetts Institute of Technology.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDER 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 "k5-int.h"
#include "os-proto.h"
#include <krb5/localauth_plugin.h>
static krb5_error_code
an2ln_names(krb5_context context, krb5_localauth_moddata data,
const char *type, const char *residual, krb5_const_principal aname,
char **lname_out)
{
krb5_error_code ret;
char *realm = NULL, *pname = NULL, **mapping_values = NULL;
const char *hierarchy[5];
size_t count;
*lname_out = NULL;
/*
* Fetch the profile values for realms-><defaultrealm>->
* auth_to_local_names-><princname>. Use the principal name without realm;
* this is problematic in many multiple-realm environments, but is how
* we've historically done it.
*/
ret = krb5_get_default_realm(context, &realm);
if (ret)
return KRB5_LNAME_NOTRANS;
ret = krb5_unparse_name_flags(context, aname,
KRB5_PRINCIPAL_UNPARSE_NO_REALM, &pname);
if (ret)
goto cleanup;
hierarchy[0] = KRB5_CONF_REALMS;
hierarchy[1] = realm;
hierarchy[2] = KRB5_CONF_AUTH_TO_LOCAL_NAMES;
hierarchy[3] = pname;
hierarchy[4] = NULL;
ret = profile_get_values(context->profile, hierarchy, &mapping_values);
if (ret) {
ret = KRB5_LNAME_NOTRANS;
goto cleanup;
}
/* We found one or more explicit mappings. Use the last one. */
for (count = 0; mapping_values[count] != NULL; count++);
*lname_out = strdup(mapping_values[count - 1]);
if (*lname_out == NULL)
ret = ENOMEM;
cleanup:
free(realm);
free(pname);
profile_free_list(mapping_values);
return ret;
}
static void
freestr(krb5_context context, krb5_localauth_moddata data, char *str)
{
free(str);
}
krb5_error_code
localauth_names_initvt(krb5_context context, int maj_ver, int min_ver,
krb5_plugin_vtable vtable)
{
krb5_localauth_vtable vt = (krb5_localauth_vtable)vtable;
vt->name = "names";
vt->an2ln = an2ln_names;
vt->free_string = freestr;
return 0;
}
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