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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* lib/krb5/krb/princ_comp.c
*
* Copyright 1990,1991,2007 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* compare two principals, returning a krb5_boolean true if equal, false if
* not.
*/
#include "k5-int.h"
#include "k5-unicode.h"
static krb5_boolean
realm_compare_flags(krb5_context context,
krb5_const_principal princ1,
krb5_const_principal princ2,
int flags)
{
const krb5_data *realm1 = krb5_princ_realm(context, princ1);
const krb5_data *realm2 = krb5_princ_realm(context, princ2);
if (realm1->length != realm2->length)
return FALSE;
return (flags & KRB5_PRINCIPAL_COMPARE_CASEFOLD) ?
(strncasecmp(realm1->data, realm2->data, realm2->length) == 0) :
(memcmp(realm1->data, realm2->data, realm2->length) == 0);
}
krb5_boolean KRB5_CALLCONV
krb5_realm_compare(krb5_context context, krb5_const_principal princ1, krb5_const_principal princ2)
{
return realm_compare_flags(context, princ1, princ2, 0);
}
static krb5_error_code
upn_to_principal(krb5_context context,
krb5_const_principal princ,
krb5_principal *upn)
{
char *unparsed_name;
krb5_error_code code;
code = krb5_unparse_name_flags(context, princ,
KRB5_PRINCIPAL_UNPARSE_NO_REALM,
&unparsed_name);
if (code) {
*upn = NULL;
return code;
}
code = krb5_parse_name(context, unparsed_name, upn);
free(unparsed_name);
return code;
}
krb5_boolean KRB5_CALLCONV
krb5_principal_compare_flags(krb5_context context,
krb5_const_principal princ1,
krb5_const_principal princ2,
int flags)
{
register int i;
krb5_int32 nelem;
unsigned int utf8 = (flags & KRB5_PRINCIPAL_COMPARE_UTF8) != 0;
unsigned int casefold = (flags & KRB5_PRINCIPAL_COMPARE_CASEFOLD) != 0;
krb5_principal upn1 = NULL;
krb5_principal upn2 = NULL;
krb5_boolean ret = FALSE;
if (flags & KRB5_PRINCIPAL_COMPARE_ENTERPRISE) {
/* Treat UPNs as if they were real principals */
if (krb5_princ_type(context, princ1) == KRB5_NT_ENTERPRISE_PRINCIPAL) {
if (upn_to_principal(context, princ1, &upn1) == 0)
princ1 = upn1;
}
if (krb5_princ_type(context, princ2) == KRB5_NT_ENTERPRISE_PRINCIPAL) {
if (upn_to_principal(context, princ2, &upn2) == 0)
princ2 = upn2;
}
}
nelem = krb5_princ_size(context, princ1);
if (nelem != krb5_princ_size(context, princ2))
goto out;
if ((flags & KRB5_PRINCIPAL_COMPARE_IGNORE_REALM) == 0 &&
!realm_compare_flags(context, princ1, princ2, flags))
goto out;
for (i = 0; i < (int) nelem; i++) {
const krb5_data *p1 = krb5_princ_component(context, princ1, i);
const krb5_data *p2 = krb5_princ_component(context, princ2, i);
krb5_boolean eq;
if (casefold) {
if (utf8)
eq = (krb5int_utf8_normcmp(p1, p2, KRB5_UTF8_CASEFOLD) == 0);
else
eq = (p1->length == p2->length
&& strncasecmp(p1->data, p2->data, p2->length) == 0);
} else
eq = data_eq(*p1, *p2);
if (!eq)
goto out;
}
ret = TRUE;
out:
if (upn1 != NULL)
krb5_free_principal(context, upn1);
if (upn2 != NULL)
krb5_free_principal(context, upn2);
return ret;
}
krb5_boolean KRB5_CALLCONV krb5_is_referral_realm(const krb5_data *r)
{
/*
* Check for a match with KRB5_REFERRAL_REALM. Currently this relies
* on that string constant being zero-length. (Unlike principal realm
* names, KRB5_REFERRAL_REALM is known to be a string.)
*/
#ifdef DEBUG_REFERRALS
#if 0
printf("krb5_is_ref_realm: checking <%s> for referralness: %s\n",
r->data,(r->length==0)?"true":"false");
#endif
#endif
assert(strlen(KRB5_REFERRAL_REALM)==0);
if (r->length==0)
return TRUE;
else
return FALSE;
}
krb5_boolean KRB5_CALLCONV
krb5_principal_compare(krb5_context context,
krb5_const_principal princ1,
krb5_const_principal princ2)
{
return krb5_principal_compare_flags(context, princ1, princ2, 0);
}
krb5_boolean KRB5_CALLCONV
krb5_principal_compare_any_realm(krb5_context context,
krb5_const_principal princ1,
krb5_const_principal princ2)
{
return krb5_principal_compare_flags(context, princ1, princ2, KRB5_PRINCIPAL_COMPARE_IGNORE_REALM);
}
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