+/*
+ * Daniel Kouril <kouril@users.sourceforge.org>
+ *
+ * Source and Documentation can be found at:
+ * http://modauthkerb.sourceforge.net/
+ *
+ * Based on work by
+ * James E. Robinson, III <james@ncstate.net>
+ * Daniel Henninger <daniel@ncsu.edu>
+ */
+
+/* ====================================================================
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2000-2003 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
+ * if any, must include the following acknowledgment:
+ * "This product includes software developed by the
+ * Apache Software Foundation (http://www.apache.org/)."
+ * Alternately, this acknowledgment may appear in the software itself,
+ * if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Apache" and "Apache Software Foundation" must
+ * not be used to endorse or promote products derived from this
+ * software without prior written permission. For written
+ * permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache",
+ * nor may "Apache" appear in their name, without prior written
+ * permission of the Apache Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation. For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ * Portions of this software are based upon public domain software
+ * originally written at the National Center for Supercomputing Applications,
+ * University of Illinois, Urbana-Champaign.
+ */
+
#ident "$Id$"
#ifndef APXS1
#ifdef KRB5
#include <krb5.h>
-#include <gssapi.h>
-#ifndef HEIMDAL
-#include <gssapi_generic.h>
-#define GSS_C_NT_USER_NAME gss_nt_user_name
-#define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
-#define krb5_get_err_text(context,code) error_message(code)
+#ifdef HEIMDAL
+# include <gssapi.h>
+#else
+# include <gssapi/gssapi.h>
+# include <gssapi/gssapi_generic.h>
+# define GSS_C_NT_USER_NAME gss_nt_user_name
+# define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
+# define krb5_get_err_text(context,code) error_message(code)
#endif
#endif /* KRB5 */
#ifdef KRB4
+/*Prevent warning about closesocket redefinition (Apache's ap_config.h and
+ * MIT Kerberos' port-sockets.h both define it as close) */
+#ifdef closesocket
+# undef closesocket
+#endif
#include <krb.h>
#endif /* KRB4 */
***************************************************************************/
typedef struct {
char *krb_auth_realms;
- char *krb_force_instance;
int krb_save_credentials;
- char *service_name;
#ifdef KRB5
char *krb_5_keytab;
int krb_method_gssapi;
command("KrbSaveCredentials", ap_set_flag_slot, krb_save_credentials,
FLAG, "Save and store credentials/tickets retrieved during auth."),
- command("KrbServiceName", ap_set_string_slot, service_name,
- TAKE1, "Kerberos service name to be used by apache."),
-
#ifdef KRB5
command("Krb5Keytab", ap_set_file_slot, krb_5_keytab,
TAKE1, "Location of Kerberos V5 keytab file."),
Username/Password Validation for Krb4
***************************************************************************/
static int
+verify_krb4_user(request_rec *r, char *name, char *instance, char *realm,
+ char *password, char *linstance, char *srvtab)
+{
+ int ret;
+ char *phost;
+ unsigned long addr;
+ struct hostent *hp;
+ const char *hostname;
+ KTEXT_ST ticket;
+ AUTH_DAT authdata;
+ char lrealm[REALM_SZ];
+
+ ret = krb_get_pw_in_tkt(name, instance, realm, "krbtgt", realm,
+ DEFAULT_TKT_LIFE, password);
+ if (ret)
+ /* log(krb_err_txt[ret]) */
+ return ret;
+
+ hostname = ap_get_server_name(r);
+
+ hp = gethostbyname(hostname);
+ if (hp == NULL) {
+ dest_tkt();
+ return h_errno;
+ }
+ memcpy(&addr, hp->h_addr, sizeof(addr));
+
+ phost = krb_get_phost((char *)hostname);
+
+ krb_get_lrealm(lrealm, 1);
+
+ ret = krb_mk_req(&ticket, linstance, phost, lrealm, 0);
+ if (ret) {
+ dest_tkt();
+ return ret;
+ }
+
+ ret = krb_rd_req(&ticket, linstance, phost, addr, &authdata, srvtab);
+ if (ret)
+ dest_tkt();
+
+ return ret;
+}
+
+static int
krb4_cache_cleanup(void *data)
{
char *tkt_file = (char *) data;
int ret;
const char *sent_pw;
const char *sent_name;
+ char *sent_instance;
char tkt_file[32];
char *tkt_file_p = NULL;
int fd;
const char *realms;
const char *realm;
- krb_principal pr;
+ char *user;
+ char lrealm[REALM_SZ];
sent_pw = ap_pbase64decode(r->pool, auth_line);
sent_name = ap_getword (r->pool, &sent_pw, ':');
+ /* do not allow user to override realm setting of server */
+ if (strchr(sent_name, '@')) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "specifying realm in user name is prohibited");
+ return HTTP_UNAUTHORIZED;
+ }
+
+ sent_instance = strchr(sent_name, '.');
+ if (sent_instance)
+ *sent_instance++ = '\0';
+
snprintf(tkt_file, sizeof(tkt_file), "/tmp/apache_tkt_XXXXXX");
fd = mkstemp(tkt_file);
if (fd < 0) {
realms = conf->krb_auth_realms;
do {
+ memset(lrealm, 0, sizeof(lrealm));
realm = NULL;
if (realms)
realm = ap_getword_white(r->pool, &realms);
- ret = krb_verify_user_srvtab((char *)sent_name, "", (char *)realm,
- (char *)sent_pw, 1, "khttp",
- conf->krb_4_srvtab);
+ if (realm == NULL) {
+ ret = krb_get_lrealm(lrealm, 1);
+ realm = lrealm;
+ }
+ if (realm == NULL || *realm == '\0')
+ break;
+
+ ret = verify_krb4_user(r, (char *)sent_name, sent_instance,
+ (char *)realm, (char *)sent_pw, "khttp",
+ conf->krb_4_srvtab);
if (ret == 0)
break;
} while (realms && *realms);
goto end;
}
- if ((ret = krb_get_tf_realm(tkt_file, pr.realm)) ||
- (ret = tf_init(tkt_file, R_TKT_FIL)) ||
- (ret = tf_get_pname(pr.name)) ||
- (ret = tf_get_pinst(pr.instance))) {
- log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "Cannot read krb4 principal from tfile (%d)", ret);
- ret = HTTP_INTERNAL_SERVER_ERROR;
- goto end;
- }
+ user = ap_pstrdup(r->pool, sent_name);
+ if (sent_instance)
+ user = ap_pstrcat(r->pool, ".", sent_instance);
+ user = ap_pstrcat(r->pool, "@", realm);
- MK_USER = ap_pstrdup (r->pool, krb_unparse_name(&pr));
+ MK_USER = user;
MK_AUTH_TYPE = "Basic";
ap_table_setn(r->subprocess_env, "KRBTKFILE", tkt_file_p);
+ if (!conf->krb_save_credentials)
+ krb4_cache_cleanup(tkt_file);
+
end:
if (ret)
krb4_cache_cleanup(tkt_file);
/***************************************************************************
Username/Password Validation for Krb5
***************************************************************************/
-#ifndef HEIMDAL
-krb5_error_code
-krb5_verify_user(krb5_context context, krb5_principal principal,
- krb5_ccache ccache, const char *password, krb5_boolean secure,
- const char *service)
+/* Inspired by krb5_verify_user from Heimdal */
+static krb5_error_code
+verify_krb5_user(request_rec *r, krb5_context context, krb5_principal principal,
+ krb5_ccache ccache, const char *password, const char *service,
+ krb5_keytab keytab)
{
krb5_creds creds;
krb5_principal server = NULL;
if (ret)
return ret;
- ret = krb5_sname_to_principal(context, NULL, service,
+ ret = krb5_sname_to_principal(context, ap_get_server_name(r), service,
KRB5_NT_SRV_HST, &server);
if (ret)
goto end;
krb5_verify_init_creds_opt_init(&opt);
- krb5_verify_init_creds_opt_set_ap_req_nofail(&opt, secure);
+ krb5_verify_init_creds_opt_set_ap_req_nofail(&opt, 1);
- ret = krb5_verify_init_creds(context, &creds, server, NULL, NULL, &opt);
+ ret = krb5_verify_init_creds(context, &creds, server, keytab, NULL, &opt);
if (ret)
goto end;
krb5_free_principal(context, server);
return ret;
}
-#endif
-
static int
krb5_cache_cleanup(void *data)
const char *sent_pw = NULL;
const char *sent_name = NULL;
const char *realms = NULL;
- const char *service_name = NULL;
krb5_context kcontext = NULL;
krb5_error_code code;
krb5_principal client = NULL;
krb5_ccache ccache = NULL;
+ krb5_keytab keytab = NULL;
int ret;
char *name = NULL;
}
if (conf->krb_5_keytab)
- setenv("KRB5_KTNAME", conf->krb_5_keytab, 1);
- /* kcontext->default_keytab = conf->krb_5_keytab; */
-
- if (conf->service_name) {
- char *p;
- service_name = ap_pstrdup(r->pool, conf->service_name);
- if ((p=strchr(service_name, '/')))
- *p = '\0';
- } else
- service_name = "khttp";
+ krb5_kt_resolve(kcontext, conf->krb_5_keytab, &keytab);
+ /* setenv("KRB5_KTNAME", conf->krb_5_keytab, 1); */
realms = conf->krb_auth_realms;
do {
if (code)
continue;
- code = krb5_verify_user(kcontext, client, ccache, sent_pw, 1,
- service_name);
+ code = verify_krb5_user(r, kcontext, client, ccache, sent_pw, "khttp",
+ keytab);
if (code == 0)
break;
krb5_free_principal(kcontext, client);
if (ccache)
krb5_cc_destroy(kcontext, ccache);
+ if (keytab)
+ krb5_kt_close(kcontext, keytab);
krb5_free_context(kcontext);
return ret;
gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
OM_uint32 major_status, minor_status, minor_status2;
gss_name_t server_name = GSS_C_NO_NAME;
+ char buf[1024];
+
+ snprintf(buf, sizeof(buf), "%s/%s", "khttp", ap_get_server_name(r));
+
+ input_token.value = buf;
+ input_token.length = strlen(buf) + 1;
- if (conf->service_name) {
- input_token.value = conf->service_name;
- input_token.length = strlen(conf->service_name) + 1;
- }
- else {
- input_token.value = "khttp";
- input_token.length = 6;
- }
major_status = gss_import_name(&minor_status, &input_token,
- (conf->service_name) ?
- GSS_C_NT_USER_NAME : GSS_C_NT_HOSTBASED_SERVICE,
+ GSS_C_NT_USER_NAME,
&server_name);
if (GSS_ERROR(major_status)) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
gss_release_buffer(&minor_status, &output_token);
-#if 0
- /* If the user comes from a realm specified by configuration don't include
- its realm name in the username so that the authorization routine could
- work for both Password-based and Ticket-based authentication. It's
- administrators responsibility to include only such realm that have
- unified principal instances, i.e. if the same principal name occures in
- multiple realms, it must be always assigned to a single user.
- */
- p = strchr(r->connection->user, '@');
- if (p != NULL) {
- const char *realms = conf->gss_krb5_realms;
-
- while (realms && *realms) {
- if (strcmp(p+1, ap_getword_white(r->pool, &realms)) == 0) {
- *p = '\0';
- break;
- }
- }
- }
-#endif
-
ret = OK;
end:
projects / mod_auth_kerb.git / commitdiff