* Ludek Sulak <xsulak@fi.muni.cz>
*/
-/* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2000-2003 The Apache Software Foundation. All rights
- * reserved.
+/*
+ * Copyright (c) 2004-2006 Masarykova universita
+ * (Masaryk University, Brno, Czech Republic)
+ * All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ * 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.
+ * 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.
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
*
- * 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.
- * ====================================================================
+ * 3. Neither the name of the University nor the names of its contributors may
+ * be used to endorse or promote products derived from this software
+ * without specific prior written permission.
*
- * 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.
+ * 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 OWNER 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.
*/
#ident "$Id$"
#include "config.h"
-#define MODAUTHKERB_VERSION "5.0-rc3"
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#define MODAUTHKERB_VERSION "5.3"
+
+#define MECH_NEGOTIATE "Negotiate"
+#define SERVICE_NAME "HTTP"
+
+#include <httpd.h>
+#include <http_config.h>
+#include <http_core.h>
+#include <http_log.h>
+#include <http_protocol.h>
+#include <http_request.h>
-#ifndef APXS1
-#include "ap_compat.h"
-#include "apr_strings.h"
+#ifdef STANDARD20_MODULE_STUFF
+#include <apr_strings.h>
+#include <apr_base64.h>
+#else
+#define apr_pstrdup ap_pstrdup
+#define apr_psprintf ap_psprintf
+#define apr_pstrcat ap_pstrcat
+#define apr_pcalloc ap_pcalloc
+#define apr_table_setn ap_table_setn
+#define apr_table_add ap_table_add
+#define apr_base64_decode_len ap_base64decode_len
+#define apr_base64_decode ap_base64decode
+#define apr_base64_encode_len ap_base64encode_len
+#define apr_base64_encode ap_base64encode
+#define apr_pool_cleanup_null ap_null_cleanup
+#define apr_pool_cleanup_register ap_register_cleanup
+#endif /* STANDARD20_MODULE_STUFF */
+
+#ifdef _WIN32
+#define vsnprintf _vsnprintf
+#define snprintf _snprintf
#endif
-#include "httpd.h"
-#include "http_config.h"
-#include "http_core.h"
-#include "http_log.h"
-#include "http_protocol.h"
-#include "http_request.h"
#ifdef KRB5
#include <krb5.h>
#else
# include <gssapi/gssapi.h>
# include <gssapi/gssapi_generic.h>
+# include <gssapi/gssapi_krb5.h>
# define GSS_C_NT_USER_NAME gss_nt_user_name
# define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
+# define GSS_KRB5_NT_PRINCIPAL_NAME gss_nt_krb5_name
# define krb5_get_err_text(context,code) error_message(code)
#endif
-#include "spnegokrb5.h"
+#ifndef GSSAPI_SUPPORTS_SPNEGO
+# include "spnegokrb5.h"
+#endif
#endif /* KRB5 */
#ifdef KRB4
-/*Prevent warning about closesocket redefinition (Apache's ap_config.h and
+/* 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
#include <netdb.h> /* gethostbyname() */
#endif /* KRB4 */
-#ifdef APXS1
-module auth_kerb_module;
-#else
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifndef KRB5_LIB_FUNCTION
+# if defined(_WIN32)
+# define KRB5_LIB_FUNCTION _stdcall
+# else
+# define KRB5_LIB_FUNCTION
+# endif
+#endif
+
+#ifdef STANDARD20_MODULE_STUFF
module AP_MODULE_DECLARE_DATA auth_kerb_module;
+#else
+module auth_kerb_module;
#endif
/***************************************************************************
Macros To Ease Compatibility
***************************************************************************/
-#ifdef APXS1
-#define MK_POOL pool
-#define MK_TABLE_GET ap_table_get
-#define MK_USER r->connection->user
-#define MK_AUTH_TYPE r->connection->ap_auth_type
-#else
+#ifdef STANDARD20_MODULE_STUFF
#define MK_POOL apr_pool_t
#define MK_TABLE_GET apr_table_get
#define MK_USER r->user
#define MK_AUTH_TYPE r->ap_auth_type
-#endif /* APXS1 */
-
+#else
+#define MK_POOL pool
+#define MK_TABLE_GET ap_table_get
+#define MK_USER r->connection->user
+#define MK_AUTH_TYPE r->connection->ap_auth_type
+#define PROXYREQ_PROXY STD_PROXY
+#endif
/***************************************************************************
Auth Configuration Structure
char *krb_auth_realms;
int krb_save_credentials;
int krb_verify_kdc;
- char *krb_service_name;
+ const char *krb_service_name;
int krb_authoritative;
+ int krb_delegate_basic;
+#if 0
+ int krb_ssl_preauthentication;
+#endif
#ifdef KRB5
char *krb_5_keytab;
int krb_method_gssapi;
int krb_method_k5pass;
+ int krb5_do_auth_to_local;
#endif
#ifdef KRB4
char *krb_4_srvtab;
#endif
} kerb_auth_config;
+typedef struct krb5_conn_data {
+ char *authline;
+ char *user;
+ char *mech;
+ int last_return;
+} krb5_conn_data;
+
+static void
+set_kerb_auth_headers(request_rec *r, const kerb_auth_config *conf,
+ int use_krb4, int use_krb5pwd, char *negotiate_ret_value);
+
static const char*
-krb5_save_realms(cmd_parms *cmd, kerb_auth_config *sec, char *arg);
+krb5_save_realms(cmd_parms *cmd, void *sec, const char *arg);
-#ifdef APXS1
+#ifdef STANDARD20_MODULE_STUFF
+#define command(name, func, var, type, usage) \
+ AP_INIT_ ## type (name, (void*) func, \
+ (void*)APR_OFFSETOF(kerb_auth_config, var), \
+ OR_AUTHCFG | RSRC_CONF, usage)
+#else
#define command(name, func, var, type, usage) \
{ name, func, \
(void*)XtOffsetOf(kerb_auth_config, var), \
- OR_AUTHCFG, type, usage }
-#else
-#define command(name, func, var, type, usage) \
- AP_INIT_ ## type (name, func, \
- (void*)APR_XtOffsetOf(kerb_auth_config, var), \
- OR_AUTHCFG, usage)
+ OR_AUTHCFG | RSRC_CONF, type, usage }
#endif
static const command_rec kerb_auth_cmds[] = {
FLAG, "Verify tickets against keytab to prevent KDC spoofing attacks."),
command("KrbServiceName", ap_set_string_slot, krb_service_name,
- TAKE1, "Service name to be used by Apache for authentication."),
+ TAKE1, "Full or partial service name to be used by Apache for authentication."),
command("KrbAuthoritative", ap_set_flag_slot, krb_authoritative,
- FLAG, "Set to 'off' to allow access control to be passed along to lower modules if the UserID is not known to this module."),
+ FLAG, "Set to 'off' to allow access control to be passed along to lower modules iff the UserID is not known to this module."),
+
+ command("KrbDelegateBasic", ap_set_flag_slot, krb_delegate_basic,
+ FLAG, "Always offer Basic authentication regardless of KrbMethodK5Pass and pass on authentication to lower modules if Basic headers arrive."),
+
+#if 0
+ command("KrbEnableSSLPreauthentication", ap_set_flag_slot, krb_ssl_preauthentication,
+ FLAG, "Don't do Kerberos authentication if the user is already authenticated using SSL and her client certificate."),
+#endif
#ifdef KRB5
command("Krb5Keytab", ap_set_file_slot, krb_5_keytab,
command("KrbMethodNegotiate", ap_set_flag_slot, krb_method_gssapi,
FLAG, "Enable Negotiate authentication method."),
- command("KrbMethodK5Pass", ap_set_flag_slot, krb_method_k5pass,
+ command("KrbMethodK5Passwd", ap_set_flag_slot, krb_method_k5pass,
FLAG, "Enable Kerberos V5 password authentication."),
+
+ command("KrbLocalUserMapping", ap_set_flag_slot, krb5_do_auth_to_local,
+ FLAG, "Set to 'on' to have Kerberos do auth_to_local mapping of principal names to system user names."),
#endif
#ifdef KRB4
command("Krb4Srvtab", ap_set_file_slot, krb_4_srvtab,
TAKE1, "Location of Kerberos V4 srvtab file."),
- command("KrbMethodK4Pass", ap_set_flag_slot, krb_method_k4pass,
+ command("KrbMethodK4Passwd", ap_set_flag_slot, krb_method_k4pass,
FLAG, "Enable Kerberos V4 password authentication."),
#endif
{ NULL }
};
-#ifdef KRB5
-typedef struct {
- gss_ctx_id_t context;
- gss_cred_id_t server_creds;
-} gss_connection_t;
-
-static gss_connection_t *gss_connection = NULL;
+#ifdef _WIN32
+int
+mkstemp(char *template)
+{
+ int start, i;
+ pid_t val;
+ val = getpid();
+ start = strlen(template) - 1;
+ while(template[start] == 'X') {
+ template[start] = '0' + val % 10;
+ val /= 10;
+ start--;
+ }
+
+ do{
+ int fd;
+ fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600);
+ if(fd >= 0 || errno != EEXIST)
+ return fd;
+ i = start + 1;
+ do{
+ if(template[i] == 0)
+ return -1;
+ template[i]++;
+ if(template[i] == '9' + 1)
+ template[i] = 'a';
+ if(template[i] <= 'z')
+ break;
+ template[i] = 'a';
+ i++;
+ }while(1);
+ }while(1);
+}
#endif
+#if defined(KRB5) && !defined(HEIMDAL)
+/* Needed to work around problems with replay caches */
+#include "mit-internals.h"
+
+/* This is our replacement krb5_rc_store function */
+static krb5_error_code KRB5_LIB_FUNCTION
+mod_auth_kerb_rc_store(krb5_context context, krb5_rcache rcache,
+ krb5_donot_replay_internal *donot_replay)
+{
+ return 0;
+}
+
+/* And this is the operations vector for our replay cache */
+const krb5_rc_ops_internal mod_auth_kerb_rc_ops = {
+ 0,
+ "dfl",
+ krb5_rc_dfl_init,
+ krb5_rc_dfl_recover,
+ krb5_rc_dfl_destroy,
+ krb5_rc_dfl_close,
+ mod_auth_kerb_rc_store,
+ krb5_rc_dfl_expunge,
+ krb5_rc_dfl_get_span,
+ krb5_rc_dfl_get_name,
+ krb5_rc_dfl_resolve
+};
+#endif
/***************************************************************************
Auth Configuration Initialization
{
kerb_auth_config *rec;
- rec = (kerb_auth_config *) ap_pcalloc(p, sizeof(kerb_auth_config));
+ rec = (kerb_auth_config *) apr_pcalloc(p, sizeof(kerb_auth_config));
((kerb_auth_config *)rec)->krb_verify_kdc = 1;
- ((kerb_auth_config *)rec)->krb_service_name = "HTTP";
+ ((kerb_auth_config *)rec)->krb_service_name = NULL;
((kerb_auth_config *)rec)->krb_authoritative = 1;
+ ((kerb_auth_config *)rec)->krb_delegate_basic = 0;
+#if 0
+ ((kerb_auth_config *)rec)->krb_ssl_preauthentication = 0;
+#endif
#ifdef KRB5
+ ((kerb_auth_config *)rec)->krb5_do_auth_to_local = 0;
((kerb_auth_config *)rec)->krb_method_k5pass = 1;
((kerb_auth_config *)rec)->krb_method_gssapi = 1;
#endif
}
static const char*
-krb5_save_realms(cmd_parms *cmd, kerb_auth_config *sec, char *arg)
+krb5_save_realms(cmd_parms *cmd, void *vsec, const char *arg)
{
- sec->krb_auth_realms= ap_pstrdup(cmd->pool, arg);
+ kerb_auth_config *sec = (kerb_auth_config *) vsec;
+ sec->krb_auth_realms= apr_pstrdup(cmd->pool, arg);
return NULL;
}
-void log_rerror(const char *file, int line, int level, int status,
- const request_rec *r, const char *fmt, ...)
+static void
+log_rerror(const char *file, int line, int level, int status,
+ const request_rec *r, const char *fmt, ...)
{
char errstr[1024];
- char errnostr[1024];
va_list ap;
va_start(ap, fmt);
vsnprintf(errstr, sizeof(errstr), fmt, ap);
va_end(ap);
- errnostr[0] = '\0';
- if (errno)
- snprintf(errnostr, sizeof(errnostr), "%s: (%s)", errstr, strerror(errno));
- else
- snprintf(errnostr, sizeof(errnostr), "%s", errstr);
-#ifdef APXS1
- ap_log_rerror(file, line, level | APLOG_NOERRNO, r, "%s", errnostr);
+#ifdef STANDARD20_MODULE_STUFF
+ ap_log_rerror(file, line, level | APLOG_NOERRNO, status, r, "%s", errstr);
#else
- ap_log_rerror(file, line, level | APLOG_NOERRNO, status, r, "%s", errnostr);
+ ap_log_rerror(file, line, level | APLOG_NOERRNO, r, "%s", errstr);
#endif
}
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 krb_verify_kdc)
+verify_krb4_user(request_rec *r, const char *name, const char *instance,
+ const char *realm, const char *password, const char *linstance, const char *srvtab, int krb_verify_kdc)
{
int ret;
char *phost;
return ret;
}
- ret = krb_rd_req(&ticket, linstance, phost, addr, &authdata, srvtab);
+ ret = krb_rd_req(&ticket, (char *)linstance, phost, addr, &authdata, (char *)srvtab);
if (ret) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Cannot verify krb4 ticket: krb_rd_req() failed: %s",
int all_principals_unkown;
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_name = ap_getword_nulls_nc (r->pool, (char **) &sent_pw, ':');
sent_instance = strchr(sent_name, '.');
if (sent_instance)
return HTTP_INTERNAL_SERVER_ERROR;
}
- tkt_file_p = ap_pstrdup(r->pool, tkt_file);
- ap_register_cleanup(r->pool, tkt_file_p,
- krb4_cache_cleanup, ap_null_cleanup);
-
+ tkt_file_p = apr_pstrdup(r->pool, tkt_file);
+ apr_pool_cleanup_register(r->pool, tkt_file_p, krb4_cache_cleanup,
+ apr_pool_cleanup_null);
+
krb_set_tkt_string(tkt_file);
all_principals_unkown = 1;
realm = lrealm;
}
+ /* XXX conf->krb_service_name */
ret = verify_krb4_user(r, (char *)sent_name,
(sent_instance) ? sent_instance : "",
(char *)realm, (char *)sent_pw,
goto end;
}
- user = ap_pstrdup(r->pool, sent_name);
+ user = apr_pstrdup(r->pool, sent_name);
if (sent_instance)
- user = ap_pstrcat(r->pool, user, ".", sent_instance, NULL);
- user = ap_pstrcat(r->pool, user, "@", realm, NULL);
+ user = apr_pstrcat(r->pool, user, ".", sent_instance, NULL);
+ user = apr_pstrcat(r->pool, user, "@", realm, NULL);
MK_USER = user;
MK_AUTH_TYPE = "Basic";
- ap_table_setn(r->subprocess_env, "KRBTKFILE", tkt_file_p);
+ apr_table_setn(r->subprocess_env, "KRBTKFILE", tkt_file_p);
if (!conf->krb_save_credentials)
krb4_cache_cleanup(tkt_file);
/***************************************************************************
Username/Password Validation for Krb5
***************************************************************************/
+
+/* MIT kerberos uses replay cache checks even during credential verification
+ * (i.e. in krb5_verify_init_creds()), which is obviosuly useless. In order to
+ * avoid problems with multiple apache processes accessing the same rcache file
+ * we had to use this call instead, which is only a bit modified version of
+ * krb5_verify_init_creds() */
+static krb5_error_code
+verify_krb5_init_creds(request_rec *r, krb5_context context, krb5_creds *creds,
+ krb5_principal ap_req_server, krb5_keytab ap_req_keytab)
+{
+ krb5_error_code ret;
+ krb5_data req;
+ krb5_ccache local_ccache = NULL;
+ krb5_creds *new_creds = NULL;
+ krb5_auth_context auth_context = NULL;
+ krb5_keytab keytab = NULL;
+ char *server_name;
+
+ memset(&req, 0, sizeof(req));
+
+ if (ap_req_keytab == NULL) {
+ ret = krb5_kt_default (context, &keytab);
+ if (ret)
+ return ret;
+ } else
+ keytab = ap_req_keytab;
+
+#ifdef HAVE_KRB5_CC_NEW_UNIQUE
+ ret = krb5_cc_new_unique(context, "MEMORY", NULL, &local_ccache);
+#else
+ ret = krb5_cc_resolve(context, "MEMORY:", &local_ccache);
+#endif
+
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "krb5_cc_resolve() failed when verifying KDC");
+ return ret;
+ }
+
+ ret = krb5_cc_initialize(context, local_ccache, creds->client);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "krb5_cc_initialize() failed when verifying KDC");
+ goto end;
+ }
+
+ ret = krb5_cc_store_cred (context, local_ccache, creds);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "krb5_cc_initialize() failed when verifying KDC");
+ goto end;
+ }
+
+ ret = krb5_unparse_name(context, ap_req_server, &server_name);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "krb5_unparse_name() failed when verifying KDC");
+ goto end;
+ }
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "Trying to verify authenticity of KDC using principal %s", server_name);
+ free(server_name);
+
+ if (!krb5_principal_compare (context, ap_req_server, creds->server)) {
+ krb5_creds match_cred;
+
+ memset (&match_cred, 0, sizeof(match_cred));
+
+ match_cred.client = creds->client;
+ match_cred.server = ap_req_server;
+
+ ret = krb5_get_credentials (context, 0, local_ccache,
+ &match_cred, &new_creds);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "krb5_get_credentials() failed when verifying KDC");
+ goto end;
+ }
+ creds = new_creds;
+ }
+
+ ret = krb5_mk_req_extended (context, &auth_context, 0, NULL, creds, &req);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "krb5_mk_req_extended() failed when verifying KDC");
+ goto end;
+ }
+
+ krb5_auth_con_free (context, auth_context);
+ auth_context = NULL;
+ ret = krb5_auth_con_init(context, &auth_context);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "krb5_auth_con_init() failed when verifying KDC");
+ goto end;
+ }
+ /* use KRB5_AUTH_CONTEXT_DO_SEQUENCE to skip replay cache checks */
+ krb5_auth_con_setflags(context, auth_context, KRB5_AUTH_CONTEXT_DO_SEQUENCE);
+
+ ret = krb5_rd_req (context, &auth_context, &req, ap_req_server,
+ keytab, 0, NULL);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "krb5_rd_req() failed when verifying KDC");
+ goto end;
+ }
+
+end:
+#ifdef HEIMDAL
+ /* XXX Do I ever want to support Heimdal 0.4 ??? */
+ krb5_data_free(&req);
+#else
+ krb5_free_data_contents(context, &req);
+#endif
+ if (auth_context)
+ krb5_auth_con_free (context, auth_context);
+ if (new_creds)
+ krb5_free_creds (context, new_creds);
+ if (ap_req_keytab == NULL && keytab)
+ krb5_kt_close (context, keytab);
+ if (local_ccache)
+ krb5_cc_destroy (context, local_ccache);
+
+ return ret;
+}
+
/* 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, int krb_verify_kdc)
+ const char *password, krb5_principal server,
+ krb5_keytab keytab, int krb_verify_kdc, char *krb_service_name, krb5_ccache *ccache)
{
krb5_creds creds;
- krb5_principal server = NULL;
+ krb5_get_init_creds_opt options;
krb5_error_code ret;
- krb5_verify_init_creds_opt opt;
+ krb5_ccache ret_ccache = NULL;
+ char *name = NULL;
+ krb5_keytab_entry entry;
+ krb5_kt_cursor cursor;
+
+ /* XXX error messages shouldn't be logged here (and in the while() loop in
+ * authenticate_user_krb5pwd() as weell), in order to avoid confusing log
+ * entries when using multiple realms */
memset(&creds, 0, sizeof(creds));
- ret = krb5_get_init_creds_password(context, &creds, principal,
- (char *)password, krb5_prompter_posix,
- NULL, 0, NULL, NULL);
- if (ret)
- return ret;
+ ret = krb5_unparse_name(context, principal, &name);
+ if (ret == 0) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "Trying to get TGT for user %s", name);
+ free(name);
+ }
- ret = krb5_sname_to_principal(context, ap_get_server_name(r), service,
- KRB5_NT_SRV_HST, &server);
- if (ret)
+ krb5_get_init_creds_opt_init(&options);
+ ret = krb5_get_init_creds_password(context, &creds, principal,
+ (char *)password, NULL,
+ NULL, 0, NULL, &options);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_get_init_creds_password() failed: %s",
+ krb5_get_err_text(context, ret));
goto end;
+ }
- krb5_verify_init_creds_opt_init(&opt);
- krb5_verify_init_creds_opt_set_ap_req_nofail(&opt, krb_verify_kdc);
+ /* XXX
+ {
+ char *realm;
- ret = krb5_verify_init_creds(context, &creds, server, keytab, NULL, &opt);
- if (ret)
+ krb5_get_default_realm(context, &realm);
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "trying to verify password using key for %s/%s@%s",
+ service, ap_get_server_name(r), realm);
+ }
+ */
+
+ /*if (krb_verify_kdc &&
+ (ret = verify_krb5_init_creds(r, context, &creds, server, keytab))) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "failed to verify krb5 credentials: %s",
+ krb5_get_err_text(context, ret));
+ goto end;
+ }*/
+
+ if (krb_verify_kdc) {
+ if (krb_service_name && strcmp(krb_service_name,"Any") == 0) {
+ ret = krb5_kt_start_seq_get(context, keytab, &cursor);
+ if(!ret) {
+ while((krb5_kt_next_entry(context, keytab, &entry, &cursor)) == 0){
+ if ((ret = verify_krb5_init_creds(r, context, &creds, entry.principal, keytab)) == 0)
+ break;
+ }
+ }
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "failed to verify krb5 credentials: %s",
+ krb5_get_err_text(context, ret));
+ krb5_kt_end_seq_get(context, keytab, &cursor);
+ krb5_kt_close(context, keytab);
+ goto end;
+ }
+ krb5_kt_end_seq_get(context, keytab, &cursor);
+ krb5_kt_close(context, keytab);
+ }
+ else {
+ if ((ret = verify_krb5_init_creds(r, context, &creds, server, keytab))) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "failed to verify krb5 credentials: %s",
+ krb5_get_err_text(context, ret));
+ goto end;
+ }
+ }
+ }
+
+#ifdef HAVE_KRB5_CC_NEW_UNIQUE
+ ret = krb5_cc_new_unique(context, "MEMORY", NULL, &ret_ccache);
+#else
+ ret = krb5_cc_resolve(context, "MEMORY:", &ret_ccache);
+#endif
+
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "generating new memory ccache failed: %s",
+ krb5_get_err_text(context, ret));
goto end;
+ }
- if (ccache) {
- ret = krb5_cc_initialize(context, ccache, principal);
- if (ret == 0)
- ret = krb5_cc_store_cred(context, ccache, &creds);
+ ret = krb5_cc_initialize(context, ret_ccache, principal);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_cc_initialize() failed: %s",
+ krb5_get_err_text(context, ret));
+ goto end;
+ }
+
+ ret = krb5_cc_store_cred(context, ret_ccache, &creds);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_cc_store_cred() failed: %s",
+ krb5_get_err_text(context, ret));
+ goto end;
}
+ *ccache = ret_ccache;
+ ret_ccache = NULL;
end:
krb5_free_cred_contents(context, &creds);
- if (server)
- krb5_free_principal(context, server);
+ if (ret_ccache)
+ krb5_cc_destroy(context, ret_ccache);
+
return ret;
}
int ret;
krb5_ccache tmp_ccache = NULL;
- ccname = ap_psprintf(r->pool, "FILE:%s/krb5cc_apache_XXXXXX", P_tmpdir);
+ ccname = apr_psprintf(r->pool, "FILE:%s/krb5cc_apache_XXXXXX", P_tmpdir);
fd = mkstemp(ccname + strlen("FILE:"));
if (fd < 0) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
goto end;
}
- ap_table_setn(r->subprocess_env, "KRB5CCNAME", ccname);
- ap_register_cleanup(r->pool, ccname,
- krb5_cache_cleanup, ap_null_cleanup);
+ apr_table_setn(r->subprocess_env, "KRB5CCNAME", ccname);
+ apr_pool_cleanup_register(r->pool, ccname, krb5_cache_cleanup,
+ apr_pool_cleanup_null);
*ccache = tmp_ccache;
tmp_ccache = NULL;
}
-int authenticate_user_krb5pwd(request_rec *r,
- kerb_auth_config *conf,
- const char *auth_line)
+static int
+authenticate_user_krb5pwd(request_rec *r,
+ kerb_auth_config *conf,
+ const char *auth_line)
{
const char *sent_pw = NULL;
const char *sent_name = NULL;
const char *realms = NULL;
+ const char *realm = NULL;
krb5_context kcontext = NULL;
krb5_error_code code;
krb5_principal client = NULL;
+ krb5_principal server = NULL;
krb5_ccache ccache = NULL;
krb5_keytab keytab = NULL;
int ret;
char *name = NULL;
int all_principals_unkown;
- char *ccname = NULL;
- int fd;
+ char *p = NULL;
code = krb5_init_context(&kcontext);
if (code) {
}
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, '@')) {
+ sent_name = ap_getword_nulls_nc (r->pool, (char **) &sent_pw, ':');
+
+ if (sent_pw == NULL || *sent_pw == '\0') {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "specifying realm in user name is prohibited");
+ "empty passwords are not accepted");
ret = HTTP_UNAUTHORIZED;
goto end;
}
- /* XXX Heimdal allows to use the MEMORY: type with empty argument ? */
- ccname = ap_psprintf(r->pool, "MEMORY:%s/krb5cc_apache_XXXXXX", P_tmpdir);
- fd = mkstemp(ccname + strlen("MEMORY:"));
- if (fd < 0) {
+ if (conf->krb_5_keytab)
+ krb5_kt_resolve(kcontext, conf->krb_5_keytab, &keytab);
+
+ if (conf->krb_service_name && strchr(conf->krb_service_name, '/') != NULL)
+ ret = krb5_parse_name (kcontext, conf->krb_service_name, &server);
+ else
+ ret = krb5_sname_to_principal(kcontext, ap_get_server_name(r),
+ (conf->krb_service_name) ? conf->krb_service_name : SERVICE_NAME,
+ KRB5_NT_SRV_HST, &server);
+
+ if (ret) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "mkstemp() failed: %s", strerror(errno));
- ret = HTTP_INTERNAL_SERVER_ERROR;
+ "Error parsing server name (%s): %s",
+ (conf->krb_service_name) ? conf->krb_service_name : SERVICE_NAME,
+ krb5_get_err_text(kcontext, ret));
+ ret = HTTP_UNAUTHORIZED;
goto end;
}
- close(fd);
- code = krb5_cc_resolve(kcontext, ccname, &ccache);
+ code = krb5_unparse_name(kcontext, server, &name);
if (code) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "krb5_cc_resolve() failed: %s",
- krb5_get_err_text(kcontext, code));
- ret = HTTP_INTERNAL_SERVER_ERROR;
- unlink(ccname);
+ "krb5_unparse_name() failed: %s",
+ krb5_get_err_text(kcontext, code));
+ ret = HTTP_UNAUTHORIZED;
goto end;
}
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "Using %s as server principal for password verification", name);
+ free(name);
+ name = NULL;
+
+ p = strchr(sent_name, '@');
+ if (p) {
+ *p++ = '\0';
+ if (conf->krb_auth_realms && !ap_find_token(r->pool, conf->krb_auth_realms, p)) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Specified realm `%s' not allowed by configuration", p);
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+ }
- if (conf->krb_5_keytab)
- krb5_kt_resolve(kcontext, conf->krb_5_keytab, &keytab);
-
+ realms = (p) ? p : conf->krb_auth_realms;
all_principals_unkown = 1;
- realms = conf->krb_auth_realms;
do {
- if (realms && (code = krb5_set_default_realm(kcontext,
- ap_getword_white(r->pool, &realms))))
- continue;
+ name = (char *) sent_name;
+ if (realms && (realm = ap_getword_white(r->pool, &realms)))
+ name = apr_psprintf(r->pool, "%s@%s", sent_name, realm);
if (client) {
krb5_free_principal(kcontext, client);
client = NULL;
}
- code = krb5_parse_name(kcontext, sent_name, &client);
- if (code)
+
+ code = krb5_parse_name(kcontext, name, &client);
+ if (code) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_parse_name() failed: %s",
+ krb5_get_err_text(kcontext, code));
continue;
+ }
- code = verify_krb5_user(r, kcontext, client, ccache, sent_pw,
- conf->krb_service_name,
- keytab, conf->krb_verify_kdc);
+ code = verify_krb5_user(r, kcontext, client, sent_pw,
+ server, keytab, conf->krb_verify_kdc, conf->krb_service_name, &ccache);
if (!conf->krb_authoritative && code) {
/* if we're not authoritative, we allow authentication to pass on
* to another modules if (and only if) the user is not known to us */
memset((char *)sent_pw, 0, strlen(sent_pw));
if (code) {
- /* XXX log only in the verify_krb5_user() call */
- log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "Verifying krb5 password failed: %s",
- krb5_get_err_text(kcontext, code));
if (!conf->krb_authoritative && all_principals_unkown == 1 && code == KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN)
ret = DECLINED;
else
ret = HTTP_UNAUTHORIZED;
goto end;
}
- MK_USER = ap_pstrdup (r->pool, name);
+ MK_USER = apr_pstrdup (r->pool, name);
MK_AUTH_TYPE = "Basic";
free(name);
ret = OK;
end:
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "kerb_authenticate_user_krb5pwd ret=%d user=%s authtype=%s",
+ ret, (MK_USER)?MK_USER:"(NULL)", (MK_AUTH_TYPE)?MK_AUTH_TYPE:"(NULL)");
if (client)
krb5_free_principal(kcontext, client);
+ if (server)
+ krb5_free_principal(kcontext, server);
if (ccache)
krb5_cc_destroy(kcontext, ccache);
if (keytab)
********************************************************************/
static const char *
-get_gss_error(MK_POOL *p, OM_uint32 err_maj, OM_uint32 err_min, char *prefix)
+get_gss_error(request_rec *r, OM_uint32 err_maj, OM_uint32 err_min, char *prefix)
{
OM_uint32 maj_stat, min_stat;
OM_uint32 msg_ctx = 0;
gss_buffer_desc status_string;
char *err_msg;
- size_t len;
- err_msg = ap_pstrdup(p, prefix);
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "GSS-API major_status:%8.8x, minor_status:%8.8x",
+ err_maj, err_min);
+
+ err_msg = apr_pstrdup(r->pool, prefix);
do {
maj_stat = gss_display_status (&min_stat,
err_maj,
GSS_C_NO_OID,
&msg_ctx,
&status_string);
- err_msg = ap_pstrcat(p, err_msg, ": ", (char*) status_string.value, NULL);
- gss_release_buffer(&min_stat, &status_string);
-
- if (GSS_ERROR(maj_stat) || msg_ctx == 0)
- break;
+ if (!GSS_ERROR(maj_stat)) {
+ err_msg = apr_pstrcat(r->pool, err_msg, ": ",
+ (char*) status_string.value, NULL);
+ gss_release_buffer(&min_stat, &status_string);
+ }
+ } while (!GSS_ERROR(maj_stat) && msg_ctx != 0);
+ msg_ctx = 0;
+ err_msg = apr_pstrcat(r->pool, err_msg, " (", NULL);
+ do {
maj_stat = gss_display_status (&min_stat,
err_min,
GSS_C_MECH_CODE,
GSS_C_NULL_OID,
&msg_ctx,
&status_string);
- err_msg = ap_pstrcat(p, err_msg, ": ", (char*) status_string.value, NULL);
- gss_release_buffer(&min_stat, &status_string);
+ if (!GSS_ERROR(maj_stat)) {
+ err_msg = apr_pstrcat(r->pool, err_msg, ", ",
+ (char *) status_string.value, NULL);
+ gss_release_buffer(&min_stat, &status_string);
+ }
} while (!GSS_ERROR(maj_stat) && msg_ctx != 0);
+ err_msg = apr_pstrcat(r->pool, err_msg, ")", NULL);
return err_msg;
}
static int
-cleanup_gss_connection(void *data)
-{
- OM_uint32 minor_status;
- gss_connection_t *gss_conn = (gss_connection_t *)data;
-
- if (data == NULL)
- return OK;
- if (gss_conn->context != GSS_C_NO_CONTEXT)
- gss_delete_sec_context(&minor_status, &gss_conn->context,
- GSS_C_NO_BUFFER);
- if (gss_conn->server_creds != GSS_C_NO_CREDENTIAL)
- gss_release_cred(&minor_status, &gss_conn->server_creds);
-
- gss_connection = NULL;
-
- return OK;
-}
-
-static int
store_gss_creds(request_rec *r, kerb_auth_config *conf, char *princ_name,
gss_cred_id_t delegated_cred)
{
if (GSS_ERROR(maj_stat)) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Cannot store delegated credential (%s)",
- get_gss_error(r->pool, maj_stat, min_stat, "gss_krb5_copy_ccache"));
+ get_gss_error(r, maj_stat, min_stat, "gss_krb5_copy_ccache"));
goto end;
}
kerb_auth_config *conf,
gss_cred_id_t *server_creds)
{
- gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
+ gss_buffer_desc 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];
+ int have_server_princ;
- snprintf(buf, sizeof(buf), "%s/%s", conf->krb_service_name, ap_get_server_name(r));
- input_token.value = buf;
- input_token.length = strlen(buf) + 1;
+ have_server_princ = conf->krb_service_name && strchr(conf->krb_service_name, '/') != NULL;
+ if (have_server_princ)
+ strncpy(buf, conf->krb_service_name, sizeof(buf));
+ else if (conf->krb_service_name && strcmp(conf->krb_service_name,"Any") == 0) {
+ *server_creds = GSS_C_NO_CREDENTIAL;
+ return 0;
+ }
+ else
+ snprintf(buf, sizeof(buf), "%s@%s",
+ (conf->krb_service_name) ? conf->krb_service_name : SERVICE_NAME,
+ ap_get_server_name(r));
- major_status = gss_import_name(&minor_status, &input_token,
- GSS_C_NT_USER_NAME,
+ token.value = buf;
+ token.length = strlen(buf) + 1;
+
+ major_status = gss_import_name(&minor_status, &token,
+ (have_server_princ) ? GSS_KRB5_NT_PRINCIPAL_NAME : GSS_C_NT_HOSTBASED_SERVICE,
&server_name);
+ memset(&token, 0, sizeof(token));
if (GSS_ERROR(major_status)) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "%s", get_gss_error(r->pool, major_status, minor_status,
+ "%s", get_gss_error(r, major_status, minor_status,
"gss_import_name() failed"));
return HTTP_INTERNAL_SERVER_ERROR;
}
+
+ major_status = gss_display_name(&minor_status, server_name, &token, NULL);
+ if (GSS_ERROR(major_status)) {
+ /* Perhaps we could just ignore this error but it's safer to give up now,
+ I think */
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "%s", get_gss_error(r, major_status, minor_status,
+ "gss_display_name() failed"));
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "Acquiring creds for %s",
+ token.value);
+ gss_release_buffer(&minor_status, &token);
major_status = gss_acquire_cred(&minor_status, server_name, GSS_C_INDEFINITE,
GSS_C_NO_OID_SET, GSS_C_ACCEPT,
gss_release_name(&minor_status2, &server_name);
if (GSS_ERROR(major_status)) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "%s", get_gss_error(r->pool, major_status, minor_status,
+ "%s", get_gss_error(r, major_status, minor_status,
"gss_acquire_cred() failed"));
return HTTP_INTERNAL_SERVER_ERROR;
}
+
+#ifndef HEIMDAL
+ /*
+ * With MIT Kerberos 5 1.3.x the gss_cred_id_t is the same as
+ * krb5_gss_cred_id_t and krb5_gss_cred_id_rec contains a pointer to
+ * the replay cache.
+ * This allows us to override the replay cache function vector with
+ * our own one.
+ * Note that this is a dirty hack to get things working and there may
+ * well be unknown side-effects.
+ */
+ {
+ krb5_gss_cred_id_t gss_creds = (krb5_gss_cred_id_t) *server_creds;
+
+ /* First we try to verify we are linked with 1.3.x to prevent from
+ crashing when linked with 1.4.x */
+ if (gss_creds && (gss_creds->usage == GSS_C_ACCEPT)) {
+ if (gss_creds->rcache && gss_creds->rcache->ops &&
+ gss_creds->rcache->ops->type &&
+ memcmp(gss_creds->rcache->ops->type, "dfl", 3) == 0)
+ /* Override the rcache operations */
+ gss_creds->rcache->ops = &mod_auth_kerb_rc_ops;
+ }
+ }
+#endif
return 0;
}
}
static int
-authenticate_user_gss(request_rec *r,
- kerb_auth_config *conf,
- const char *auth_line)
+authenticate_user_gss(request_rec *r, kerb_auth_config *conf,
+ const char *auth_line, char **negotiate_ret_value)
{
OM_uint32 major_status, minor_status, minor_status2;
gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
int ret;
gss_name_t client_name = GSS_C_NO_NAME;
gss_cred_id_t delegated_cred = GSS_C_NO_CREDENTIAL;
- OM_uint32 (*accept_sec_token)();
+ OM_uint32 (KRB5_LIB_FUNCTION *accept_sec_token)
+ (OM_uint32 *, gss_ctx_id_t *, const gss_cred_id_t,
+ const gss_buffer_t, const gss_channel_bindings_t,
+ gss_name_t *, gss_OID *, gss_buffer_t, OM_uint32 *,
+ OM_uint32 *, gss_cred_id_t *);
gss_OID_desc spnego_oid;
+ gss_ctx_id_t context = GSS_C_NO_CONTEXT;
+ gss_cred_id_t server_creds = GSS_C_NO_CREDENTIAL;
+ OM_uint32 ret_flags = 0;
+
+ *negotiate_ret_value = "\0";
spnego_oid.length = 6;
spnego_oid.elements = (void *)"\x2b\x06\x01\x05\x05\x02";
- if (gss_connection == NULL) {
- gss_connection = ap_pcalloc(r->connection->pool, sizeof(*gss_connection));
- if (gss_connection == NULL) {
- log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "ap_pcalloc() failed (not enough memory)");
- ret = HTTP_INTERNAL_SERVER_ERROR;
- goto end;
- }
- memset(gss_connection, 0, sizeof(*gss_connection));
- ap_register_cleanup(r->connection->pool, gss_connection, cleanup_gss_connection, ap_null_cleanup);
- }
-
if (conf->krb_5_keytab) {
char *ktname;
/* we don't use the ap_* calls here, since the string passed to putenv()
}
sprintf(ktname, "KRB5_KTNAME=%s", conf->krb_5_keytab);
putenv(ktname);
+#ifdef HEIMDAL
+ /* Seems to be also supported by latest MIT */
+ gsskrb5_register_acceptor_identity(conf->krb_5_keytab);
+#endif
}
- if (gss_connection->server_creds == GSS_C_NO_CREDENTIAL) {
- ret = get_gss_creds(r, conf, &gss_connection->server_creds);
- if (ret)
- goto end;
- }
+ ret = get_gss_creds(r, conf, &server_creds);
+ if (ret)
+ goto end;
/* ap_getword() shifts parameter */
auth_param = ap_getword_white(r->pool, &auth_line);
goto end;
}
- input_token.length = ap_base64decode_len(auth_param) + 1;
- input_token.value = ap_pcalloc(r->connection->pool, input_token.length);
+ input_token.length = apr_base64_decode_len(auth_param) + 1;
+ input_token.value = apr_pcalloc(r->connection->pool, input_token.length);
if (input_token.value == NULL) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"ap_pcalloc() failed (not enough memory)");
ret = HTTP_INTERNAL_SERVER_ERROR;
goto end;
}
- input_token.length = ap_base64decode(input_token.value, auth_param);
+ input_token.length = apr_base64_decode(input_token.value, auth_param);
+#ifdef GSSAPI_SUPPORTS_SPNEGO
+ accept_sec_token = gss_accept_sec_context;
+#else
accept_sec_token = (cmp_gss_type(&input_token, &spnego_oid) == 0) ?
gss_accept_sec_context_spnego : gss_accept_sec_context;
+#endif
+
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "Verifying client data using %s",
+ (accept_sec_token == gss_accept_sec_context)
+ ? "KRB5 GSS-API"
+ : "SPNEGO GSS-API");
major_status = accept_sec_token(&minor_status,
- &gss_connection->context,
- gss_connection->server_creds,
+ &context,
+ server_creds,
&input_token,
GSS_C_NO_CHANNEL_BINDINGS,
&client_name,
NULL,
&output_token,
- NULL,
+ &ret_flags,
NULL,
&delegated_cred);
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "Client %s us their credential",
+ (ret_flags & GSS_C_DELEG_FLAG) ? "sent" : "didn't send");
if (output_token.length) {
char *token = NULL;
size_t len;
- len = ap_base64encode_len(output_token.length) + 1;
- token = ap_pcalloc(r->connection->pool, len + 1);
+ len = apr_base64_encode_len(output_token.length) + 1;
+ token = apr_pcalloc(r->connection->pool, len + 1);
if (token == NULL) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"ap_pcalloc() failed (not enough memory)");
gss_release_buffer(&minor_status2, &output_token);
goto end;
}
- ap_base64encode(token, output_token.value, output_token.length);
+ apr_base64_encode(token, output_token.value, output_token.length);
token[len] = '\0';
- ap_table_set(r->err_headers_out, "WWW-Authenticate",
- ap_pstrcat(r->pool, "Negotiate ", token, NULL));
+ *negotiate_ret_value = token;
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "GSS-API token of length %d bytes will be sent back",
+ output_token.length);
gss_release_buffer(&minor_status2, &output_token);
+ set_kerb_auth_headers(r, conf, 0, 0, *negotiate_ret_value);
}
if (GSS_ERROR(major_status)) {
+ if (input_token.length > 7 && memcmp(input_token.value, "NTLMSSP", 7) == 0)
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "Warning: received token seems to be NTLM, which isn't supported by the Kerberos module. Check your IE configuration.");
+
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "%s", get_gss_error(r->pool, major_status, minor_status,
+ "%s", get_gss_error(r, major_status, minor_status,
"gss_accept_sec_context() failed"));
+ /* Don't offer the Negotiate method again if call to GSS layer failed */
+ *negotiate_ret_value = NULL;
ret = HTTP_UNAUTHORIZED;
goto end;
}
+#if 0
+ /* This is a _Kerberos_ module so multiple authentication rounds aren't
+ * supported. If we wanted a generic GSS authentication we would have to do
+ * some magic with exporting context etc. */
if (major_status & GSS_S_CONTINUE_NEEDED) {
- /* Some GSSAPI mechanism (eg GSI from Globus) may require multiple
- * iterations to establish authentication */
ret = HTTP_UNAUTHORIZED;
goto end;
}
+#endif
major_status = gss_display_name(&minor_status, client_name, &output_token, NULL);
gss_release_name(&minor_status, &client_name);
if (GSS_ERROR(major_status)) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "%s", get_gss_error(r->pool, major_status, minor_status,
- "gss_export_name() failed"));
+ "%s", get_gss_error(r, major_status, minor_status,
+ "gss_display_name() failed"));
ret = HTTP_INTERNAL_SERVER_ERROR;
goto end;
}
- MK_AUTH_TYPE = "Negotiate";
- MK_USER = ap_pstrdup(r->pool, output_token.value);
+ MK_AUTH_TYPE = MECH_NEGOTIATE;
+ MK_USER = apr_pstrdup(r->pool, output_token.value);
if (conf->krb_save_credentials && delegated_cred != GSS_C_NO_CREDENTIAL)
store_gss_creds(r, conf, (char *)output_token.value, delegated_cred);
-
+
gss_release_buffer(&minor_status, &output_token);
ret = OK;
if (client_name != GSS_C_NO_NAME)
gss_release_name(&minor_status, &client_name);
- cleanup_gss_connection(gss_connection);
+ if (server_creds != GSS_C_NO_CREDENTIAL)
+ gss_release_cred(&minor_status, &server_creds);
+
+ if (context != GSS_C_NO_CONTEXT)
+ gss_delete_sec_context(&minor_status, &context, GSS_C_NO_BUFFER);
return ret;
}
-#endif /* KRB5 */
static int
-already_succeeded(request_rec *r)
+do_krb5_an_to_ln(request_rec *r) {
+ krb5_error_code code;
+ int ret = HTTP_INTERNAL_SERVER_ERROR;
+ char *MK_USER_LNAME = NULL;
+ krb5_context kcontext = NULL;
+ krb5_principal client = NULL;
+
+ code = krb5_init_context(&kcontext);
+ if (code) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot initialize Kerberos5 context (%d)", code);
+ goto end;
+ }
+
+ code = krb5_parse_name(kcontext, MK_USER, &client);
+ if (code) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_parse_name() failed: %s",
+ krb5_get_err_text(kcontext, code));
+ goto end;
+ }
+ MK_USER_LNAME = apr_pcalloc(r->pool, strlen(MK_USER)+1);
+ if (MK_USER_LNAME == NULL) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "ap_pcalloc() failed (not enough memory)");
+ goto end;
+ }
+ code = krb5_aname_to_localname(kcontext, client, strlen(MK_USER), MK_USER_LNAME);
+ if (code) {
+ if (code != KRB5_LNAME_NOTRANS) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_aname_to_localname() failed: %s",
+ krb5_get_err_text(kcontext, code));
+
+ }
+ else {
+ log_rerror(APLOG_MARK, APLOG_NOTICE, 0, r,
+ "krb5_aname_to_localname() found no "
+ "mapping for principal %s",
+ MK_USER);
+ }
+ }
+ else {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "kerb_authenticate_a_name_to_local_name %s -> %s",
+ (MK_USER)?MK_USER:"(NULL)", (MK_USER_LNAME)?MK_USER_LNAME:"(NULL)");
+ MK_USER = apr_pstrdup(r->pool, MK_USER_LNAME);
+ ret = OK;
+ }
+ end:
+ if (client)
+ krb5_free_principal(kcontext, client);
+ if (kcontext)
+ krb5_free_context(kcontext);
+ return ret;
+}
+
+
+#endif /* KRB5 */
+
+static krb5_conn_data *
+already_succeeded(request_rec *r, char *auth_line)
{
- if (ap_is_initial_req(r) || MK_AUTH_TYPE == NULL)
- return 0;
- if (strcmp(MK_AUTH_TYPE, "Negotiate") ||
- (strcmp(MK_AUTH_TYPE, "Basic") && strchr(MK_USER, '@')))
- return 1;
- return 0;
+ krb5_conn_data *conn_data;
+ const char keyname[1024];
+
+ snprintf(keyname, sizeof(keyname) - 1,
+ "mod_auth_kerb::connection::%s::%ld", r->connection->remote_ip,
+ r->connection->id);
+
+ if (apr_pool_userdata_get(&conn_data, keyname, r->connection->pool) != 0)
+ return NULL;
+
+ if(conn_data) {
+ if(strcmp(conn_data->authline, auth_line) == 0) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "matched previous auth request");
+ return conn_data;
+ }
+ }
+ return NULL;
}
static void
-note_kerb_auth_failure(request_rec *r, const kerb_auth_config *conf,
- int use_krb4, int use_krb5)
+set_kerb_auth_headers(request_rec *r, const kerb_auth_config *conf,
+ int use_krb4, int use_krb5pwd, char *negotiate_ret_value)
{
const char *auth_name = NULL;
int set_basic = 0;
+ char *negoauth_param;
+ const char *header_name =
+ (r->proxyreq == PROXYREQ_PROXY) ? "Proxy-Authenticate" : "WWW-Authenticate";
/* get the user realm specified in .htaccess */
auth_name = ap_auth_name(r);
- /* XXX should the WWW-Authenticate header be cleared first? */
+ /* XXX should the WWW-Authenticate header be cleared first?
+ * apache in the proxy mode should retain client's authN headers? */
#ifdef KRB5
- if (use_krb5 && conf->krb_method_gssapi)
- ap_table_add(r->err_headers_out, "WWW-Authenticate", "Negotiate");
- if (use_krb5 && conf->krb_method_k5pass) {
- ap_table_add(r->err_headers_out, "WWW-Authenticate",
- ap_pstrcat(r->pool, "Basic realm=\"", auth_name, "\"", NULL));
+ if (negotiate_ret_value != NULL && conf->krb_method_gssapi) {
+ negoauth_param = (*negotiate_ret_value == '\0') ? MECH_NEGOTIATE :
+ apr_pstrcat(r->pool, MECH_NEGOTIATE " ", negotiate_ret_value, NULL);
+ apr_table_add(r->err_headers_out, header_name, negoauth_param);
+ }
+ if ((use_krb5pwd && conf->krb_method_k5pass) || conf->krb_delegate_basic) {
+ apr_table_add(r->err_headers_out, header_name,
+ apr_pstrcat(r->pool, "Basic realm=\"", auth_name, "\"", NULL));
set_basic = 1;
}
#endif
#ifdef KRB4
- if (use_krb4 && conf->krb_method_k4pass && !set_basic)
- ap_table_add(r->err_headers_out, "WWW-Authenticate",
- ap_pstrcat(r->pool, "Basic realm=\"", auth_name, "\"", NULL));
+ if (!set_basic &&
+ ((use_krb4 && conf->krb_method_k4pass) || conf->krb_delegate_basic))
+ apr_table_add(r->err_headers_out, header_name,
+ apr_pstrcat(r->pool, "Basic realm=\"", auth_name, "\"", NULL));
#endif
}
-int kerb_authenticate_user(request_rec *r)
+static int
+kerb_authenticate_user(request_rec *r)
{
kerb_auth_config *conf =
(kerb_auth_config *) ap_get_module_config(r->per_dir_config,
&auth_kerb_module);
+ krb5_conn_data *prevauth = NULL;
const char *auth_type = NULL;
const char *auth_line = NULL;
const char *type = NULL;
int use_krb5 = 0, use_krb4 = 0;
int ret;
static int last_return = HTTP_UNAUTHORIZED;
+ char *negotiate_ret_value = NULL;
+ char keyname[1024];
/* get the type specified in .htaccess */
type = ap_auth_type(r);
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "kerb_authenticate_user entered with user %s and auth_type %s",
+ (MK_USER)?MK_USER:"(NULL)",type?type:"(NULL)");
+
if (type && strcasecmp(type, "Kerberos") == 0)
use_krb5 = use_krb4 = 1;
else if(type && strcasecmp(type, "KerberosV5") == 0)
- use_krb4 = 0;
+ use_krb5 = 1;
else if(type && strcasecmp(type, "KerberosV4") == 0)
- use_krb5 = 0;
+ use_krb4 = 1;
else
return DECLINED;
+#if 0
+ if (conf->krb_ssl_preauthentication) {
+ const char *ssl_client_verify = ssl_var_lookup(r->pool, r->server,
+ r->connection, r, "SSL_CLIENT_VERIFY");
+
+ if (ssl_client_verify && strcmp(ssl_client_verify, "SUCCESS") == 0)
+ return OK;
+ }
+#endif
+
/* get what the user sent us in the HTTP header */
- auth_line = MK_TABLE_GET(r->headers_in, "Authorization");
+ auth_line = MK_TABLE_GET(r->headers_in, (r->proxyreq == PROXYREQ_PROXY)
+ ? "Proxy-Authorization"
+ : "Authorization");
if (!auth_line) {
- note_kerb_auth_failure(r, conf, use_krb4, use_krb5);
+ set_kerb_auth_headers(r, conf, use_krb4, use_krb5,
+ (use_krb5) ? "\0" : NULL);
return HTTP_UNAUTHORIZED;
}
auth_type = ap_getword_white(r->pool, &auth_line);
- if (already_succeeded(r))
- return last_return;
+ /* If we are delegating Basic to other modules, DECLINE the request */
+ if (conf->krb_delegate_basic &&
+#ifdef KRB5
+ !conf->krb_method_k5pass &&
+#endif
+#ifdef KRB4
+ !conf->krb_method_k4pass &&
+#endif
+ (strcasecmp(auth_type, "Basic") == 0))
+ return DECLINED;
- ret = HTTP_UNAUTHORIZED;
+ if ( (prevauth = already_succeeded(r, auth_line)) == NULL) {
+ ret = HTTP_UNAUTHORIZED;
#ifdef KRB5
if (use_krb5 && conf->krb_method_gssapi &&
- strcasecmp(auth_type, "Negotiate") == 0) {
- ret = authenticate_user_gss(r, conf, auth_line);
+ strcasecmp(auth_type, MECH_NEGOTIATE) == 0) {
+ ret = authenticate_user_gss(r, conf, auth_line, &negotiate_ret_value);
} else if (use_krb5 && conf->krb_method_k5pass &&
strcasecmp(auth_type, "Basic") == 0) {
ret = authenticate_user_krb5pwd(r, conf, auth_line);
#endif
if (ret == HTTP_UNAUTHORIZED)
- note_kerb_auth_failure(r, conf, use_krb4, use_krb5);
+ set_kerb_auth_headers(r, conf, use_krb4, use_krb5, negotiate_ret_value);
+
+ } else {
+ ret = prevauth->last_return;
+ MK_USER = prevauth->user;
+ MK_AUTH_TYPE = prevauth->mech;
+ }
+
+ /*
+ * save who was auth'd, if it's not already stashed.
+ */
+ if(!prevauth) {
+ prevauth = (krb5_conn_data *) apr_pcalloc(r->connection->pool, sizeof(krb5_conn_data));
+ prevauth->user = apr_pstrdup(r->connection->pool, MK_USER);
+ prevauth->authline = apr_pstrdup(r->connection->pool, auth_line);
+ prevauth->mech = apr_pstrdup(r->connection->pool, auth_type);
+ prevauth->last_return = ret;
+ snprintf(keyname, sizeof(keyname) - 1,
+ "mod_auth_kerb::connection::%s::%ld",
+ r->connection->remote_ip, r->connection->id);
+ apr_pool_userdata_set(prevauth, keyname, NULL, r->connection->pool);
+ }
+
+ if (ret == OK && conf->krb5_do_auth_to_local)
+ ret = do_krb5_an_to_ln(r);
+
+ /* XXX log_debug: if ret==OK, log(user XY authenticated) */
last_return = ret;
return ret;
}
+int
+have_rcache_type(const char *type)
+{
+ krb5_error_code ret;
+ krb5_context context;
+ krb5_rcache id = NULL;
+ int found;
+
+ ret = krb5_init_context(&context);
+ if (ret)
+ return 0;
+
+ ret = krb5_rc_resolve_full(context, &id, "none:");
+ found = (ret == 0);
+
+ if (ret == 0)
+ krb5_rc_destroy(context, id);
+ krb5_free_context(context);
+
+ return found;
+}
/***************************************************************************
Module Setup/Configuration
***************************************************************************/
-#ifdef APXS1
+#ifndef STANDARD20_MODULE_STUFF
+static void
+kerb_module_init(server_rec *dummy, pool *p)
+{
+#ifndef HEIMDAL
+ /* Suppress the MIT replay cache. Requires MIT Kerberos 1.4.0 or later.
+ 1.3.x are covered by the hack overiding the replay calls */
+ if (getenv("KRB5RCACHETYPE") == NULL && have_rcache_type("none"))
+ putenv(strdup("KRB5RCACHETYPE=none"));
+#endif
+}
+
module MODULE_VAR_EXPORT auth_kerb_module = {
STANDARD_MODULE_STUFF,
- NULL, /* module initializer */
+ kerb_module_init, /* module initializer */
kerb_dir_create_config, /* per-directory config creator */
NULL, /* per-directory config merger */
NULL, /* per-server config creator */
NULL, /* process initialization */
NULL, /* process exit/cleanup */
NULL /* [ 1] post read_request handling */
+#ifdef EAPI
+ ,NULL, /* EAPI: add_module */
+ NULL, /* EAPI: remove_module */
+ NULL, /* EAPI: rewrite_command */
+ NULL /* EAPI: new_connection */
+#endif
};
#else
static int
apr_pool_t *ptemp, server_rec *s)
{
ap_add_version_component(p, "mod_auth_kerb/" MODAUTHKERB_VERSION);
+#ifndef HEIMDAL
+ /* Suppress the MIT replay cache. Requires MIT Kerberos 1.4.0 or later.
+ 1.3.x are covered by the hack overiding the replay calls */
+ if (getenv("KRB5RCACHETYPE") == NULL && have_rcache_type("none"))
+ putenv(strdup("KRB5RCACHETYPE=none"));
+#endif
+
return OK;
}
-void kerb_register_hooks(apr_pool_t *p)
+static void
+kerb_register_hooks(apr_pool_t *p)
{
ap_hook_post_config(kerb_init_handler, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_check_user_id(kerb_authenticate_user, NULL, NULL, APR_HOOK_MIDDLE);
projects / mod_auth_kerb.cvs / .git / blobdiff