-/***************************************************************************
- Included Headers And Module Declaration
- ***************************************************************************/
-#ifdef APXS1
-#include "httpd.h"
-#include "http_config.h"
-#include "http_core.h"
-#include "http_log.h"
-#include "http_protocol.h"
-#include "http_request.h"
-
-module kerb_auth_module;
-#else
-#ifdef APXS2
+/*
+ * 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
+#include "ap_compat.h"
#include "apr_strings.h"
-#include "apr_lib.h"
-#include "ap_config.h"
+#endif
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_request.h"
-module AP_MODULE_DECLARE_DATA kerb_auth_module;
-#endif /* APXS2 */
-#endif /* 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)
+#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 */
-
-
+#ifdef APXS1
+module auth_kerb_module;
+#else
+module AP_MODULE_DECLARE_DATA auth_kerb_module;
+#endif
/***************************************************************************
Macros To Ease Compatibility
#define MK_TABLE_SET ap_table_set
#define MK_TABLE_TYPE table
#define MK_PSTRDUP ap_pstrdup
-#define MK_PROXY STD_PROXY
#define MK_USER r->connection->user
#define MK_AUTH_TYPE r->connection->ap_auth_type
#define MK_ARRAY_HEADER array_header
#else
-#ifdef APXS2
#define MK_POOL apr_pool_t
#define MK_TABLE_GET apr_table_get
#define MK_TABLE_SET apr_table_set
#define MK_TABLE_TYPE apr_table_t
#define MK_PSTRDUP apr_pstrdup
-#define MK_PROXY PROXYREQ_PROXY
#define MK_USER r->user
#define MK_AUTH_TYPE r->ap_auth_type
#define MK_ARRAY_HEADER apr_array_header_t
-#endif /* APXS2 */
#endif /* APXS1 */
-
-
/***************************************************************************
Auth Configuration Structure
***************************************************************************/
typedef struct {
- char *krb_auth_type;
-#ifdef KRB4
- char *krb_4_srvtab;
-#endif /* KRB4 */
+ char *krb_auth_realms;
+ int krb_save_credentials;
#ifdef KRB5
char *krb_5_keytab;
-#endif /* KRB5 */
- int krb_authoritative;
- char *krb_default_realm;
- int krb_fail_status;
- char *krb_force_instance;
-#ifdef KRB5
- int krb_forwardable;
-#endif /* KRB5 */
- char *krb_lifetime;
-#ifdef KRB5
- char *krb_renewable;
-#endif /* KRB5 */
- int krb_save_credentials;
- char *krb_tmp_dir;
+ int krb_method_gssapi;
+ int krb_method_k5pass;
+#endif
+#ifdef KRB4
+ char *krb_4_srvtab;
+ int krb_method_k4pass;
+#endif
} kerb_auth_config;
+static const char*
+krb5_save_realms(cmd_parms *cmd, kerb_auth_config *sec, char *arg);
+#ifdef APXS1
+#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)
+#endif
+static const command_rec kerb_auth_cmds[] = {
+ command("KrbAuthRealms", krb5_save_realms, krb_auth_realms,
+ RAW_ARGS, "Realms to attempt authentication against (can be multiple)."),
-/***************************************************************************
- Auth Configuration Initialization
- ***************************************************************************/
-static void *kerb_dir_config(MK_POOL *p, char *d)
-{
- static void *rec;
- rec = (void *) ap_pcalloc(p, sizeof(kerb_auth_config));
- ((kerb_auth_config *)rec)->krb_fail_status = HTTP_UNAUTHORIZED;
- ((kerb_auth_config *)rec)->krb_authoritative = 0;
- ((kerb_auth_config *)rec)->krb_auth_type = MK_PSTRDUP(p, "None");
- return rec;
-}
+ command("KrbAuthRealm", krb5_save_realms, krb_auth_realms,
+ RAW_ARGS, "Alias for KrbAuthRealms."),
+
+ command("KrbSaveCredentials", ap_set_flag_slot, krb_save_credentials,
+ FLAG, "Save and store credentials/tickets retrieved during auth."),
+
+#ifdef KRB5
+ command("Krb5Keytab", ap_set_file_slot, krb_5_keytab,
+ TAKE1, "Location of Kerberos V5 keytab file."),
+
+ command("KrbMethodNegotiate", ap_set_flag_slot, krb_method_gssapi,
+ FLAG, "Enable Negotiate authentication method."),
+
+ command("KrbMethodK5Pass", ap_set_flag_slot, krb_method_k5pass,
+ FLAG, "Enable Kerberos V5 password authentication."),
+#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,
+ 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;
+#endif
/***************************************************************************
- Auth Configuration Parsers
+ Auth Configuration Initialization
***************************************************************************/
-static const char *kerb_set_fail_slot(cmd_parms *cmd, void *struct_ptr,
- const char *arg)
+static void *kerb_dir_create_config(MK_POOL *p, char *d)
{
- int offset = (int) (long) cmd->info;
- if (!strncasecmp(arg, "unauthorized", 12))
- *(int *) ((char *)struct_ptr + offset) = HTTP_UNAUTHORIZED;
- else if (!strncasecmp(arg, "forbidden", 9))
- *(int *) ((char *)struct_ptr + offset) = HTTP_FORBIDDEN;
- else if (!strncasecmp(arg, "declined", 8))
- *(int *) ((char *)struct_ptr + offset) = DECLINED;
- else
- return "KrbAuthFailStatus must be Forbidden, Unauthorized, or Declined.";
- return NULL;
-}
+ kerb_auth_config *rec;
-/* these are either char *struct_ptr, char *arg or void *struct_ptr, const char *arg */
-static const char *kerb_set_type_slot(cmd_parms *cmd, void *struct_ptr,
- const char *arg)
-{
- int offset = (int) (long) cmd->info;
- if
+ rec = (kerb_auth_config *) ap_pcalloc(p, sizeof(kerb_auth_config));
#ifdef KRB5
- (!strncasecmp(arg, "v5", 2))
- *(char **) ((char *)struct_ptr + offset) = MK_PSTRDUP(cmd->pool, "KerberosV5");
- else if
-#endif /* KRB5 */
+ ((kerb_auth_config *)rec)->krb_method_k5pass = 1;
+ ((kerb_auth_config *)rec)->krb_method_gssapi = 1;
+#endif
#ifdef KRB4
- (!strncasecmp(arg, "v4", 2))
- *(char **) ((char *)struct_ptr + offset) = MK_PSTRDUP(cmd->pool, "KerberosV4");
-#endif /* KRB4 */
- else if
- (!strncasecmp(arg, "dualv5v4", 8))
- *(char **) ((char *)struct_ptr + offset) = MK_PSTRDUP(cmd->pool, "KerberosDualV5V4");
- else if
- (!strncasecmp(arg, "dualv4v5", 8))
- *(char **) ((char *)struct_ptr + offset) = MK_PSTRDUP(cmd->pool, "KerberosDualV4V5");
-#if defined(KRB4) && defined(KRB5)
-#endif /* KRB4 && KRB5 */
- else
- return "AuthKerberos must be V5, V4, DualV4V5, or DualV5V4.";
- return NULL;
+ ((kerb_auth_config *)rec)->krb_method_k4pass = 1;
+#endif
+ return rec;
}
+static const char*
+krb5_save_realms(cmd_parms *cmd, kerb_auth_config *sec, char *arg)
+{
+ sec->krb_auth_realms= ap_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, ...)
+{
+ char errstr[1024];
+ va_list ap;
+ va_start(ap, fmt);
+ vsnprintf(errstr, sizeof(errstr), fmt, ap);
+ va_end(ap);
-/***************************************************************************
- Auth Configuration Commands
- ***************************************************************************/
#ifdef APXS1
-command_rec kerb_auth_cmds[] = {
- {
- "AuthKerberos",
- kerb_set_type_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_auth_type),
- OR_AUTHCFG,
- TAKE1,
- "Permit Kerberos auth without AuthType requirement."
- },
+ ap_log_rerror(file, line, level, r, "%s", errstr);
+#else
+ ap_log_rerror(file, line, level, status, r, "%s", errstr);
+#endif
+}
#ifdef KRB4
- {
- "Krb4Srvtab",
- ap_set_file_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_4_srvtab),
- RSRC_CONF & ACCESS_CONF,
- TAKE1,
- "Location of Kerberos V4 srvtab file."
- },
-#endif /* KRB4 */
+/***************************************************************************
+ 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;
+}
-#ifdef KRB5
- {
- "Krb5Keytab",
- ap_set_file_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_5_keytab),
- RSRC_CONF & ACCESS_CONF,
- TAKE1,
- "Location of Kerberos V5 keytab file."
- },
-#endif /* KRB5 */
+static int
+krb4_cache_cleanup(void *data)
+{
+ char *tkt_file = (char *) data;
+
+ krb_set_tkt_string(tkt_file);
+ dest_tkt();
+ return OK;
+}
- {
- "KrbAuthoritative",
- ap_set_flag_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_authoritative),
- OR_AUTHCFG,
- FLAG,
- "Refuse to pass request down to lower modules."
- },
-
- {
- "KrbDefaultRealm",
- ap_set_string_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_default_realm),
- OR_AUTHCFG,
- TAKE1,
- "Default realm to authenticate users against."
- },
-
- {
- "KrbFailStatus",
- kerb_set_fail_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_fail_status),
- OR_AUTHCFG,
- TAKE1,
- "If auth fails, return status set here."
- },
-
- {
- "KrbForceInstance",
- ap_set_string_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_force_instance),
- OR_AUTHCFG,
- TAKE1,
- "Force authentication against an instance specified here."
- },
+static int
+authenticate_user_krb4pwd(request_rec *r,
+ kerb_auth_config *conf,
+ const char *auth_line)
+{
+ 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;
+ 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) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot create krb4 ccache: mkstemp() failed: %s",
+ strerror(errno));
+ 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);
+
+ krb_set_tkt_string(tkt_file);
+
+ realms = conf->krb_auth_realms;
+ do {
+ memset(lrealm, 0, sizeof(lrealm));
+ realm = NULL;
+ if (realms)
+ realm = ap_getword_white(r->pool, &realms);
+
+ 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) ? sent_instance : "",
+ (char *)realm, (char *)sent_pw, "khttp",
+ conf->krb_4_srvtab);
+ if (ret == 0)
+ break;
+ } while (realms && *realms);
+
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Verifying krb4 password failed (%d)", ret);
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ user = ap_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);
+
+ 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);
+ close(fd);
+ tf_close();
+
+ return ret;
+}
+#endif /* KRB4 */
#ifdef KRB5
- {
- "KrbForwardable",
- ap_set_flag_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_forwardable),
- OR_AUTHCFG,
- FLAG,
- "Credentials retrieved will be flagged as forwardable."
- },
-#endif /* KRB5 */
+/***************************************************************************
+ Username/Password Validation for Krb5
+ ***************************************************************************/
+/* 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;
+ krb5_error_code ret;
+ krb5_verify_init_creds_opt opt;
+
+ 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_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, 1);
+
+ ret = krb5_verify_init_creds(context, &creds, server, keytab, NULL, &opt);
+ if (ret)
+ goto end;
+
+ if (ccache) {
+ ret = krb5_cc_initialize(context, ccache, principal);
+ if (ret == 0)
+ ret = krb5_cc_store_cred(context, ccache, &creds);
+ }
+
+end:
+ krb5_free_cred_contents(context, &creds);
+ if (server)
+ krb5_free_principal(context, server);
+ return ret;
+}
- {
- "KrbLifetime",
- ap_set_string_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_lifetime),
- OR_AUTHCFG,
- TAKE1,
- "Lifetime of tickets retrieved."
- },
+static int
+krb5_cache_cleanup(void *data)
+{
+ krb5_context context;
+ krb5_ccache cache;
+ krb5_error_code problem;
+ char *cache_name = (char *) data;
+
+ problem = krb5_init_context(&context);
+ if (problem) {
+ /* ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, "krb5_init_context() failed"); */
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ problem = krb5_cc_resolve(context, cache_name, &cache);
+ if (problem) {
+ /* log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
+ "krb5_cc_resolve() failed (%s: %s)",
+ cache_name, krb5_get_err_text(context, problem)); */
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ krb5_cc_destroy(context, cache);
+ krb5_free_context(context);
+ return OK;
+}
-#ifdef KRB5
- {
- "KrbRenewable",
- ap_set_string_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_renewable),
- OR_AUTHCFG,
- TAKE1,
- "Credentials retrieved will be renewable for this length."
- },
-#endif /* KRB5 */
+static int
+create_krb5_ccache(krb5_context kcontext,
+ request_rec *r,
+ kerb_auth_config *conf,
+ krb5_principal princ,
+ krb5_ccache *ccache)
+{
+ char *ccname;
+ krb5_error_code problem;
+ int ret;
+ krb5_ccache tmp_ccache = NULL;
- {
- "KrbSaveCredentials",
- ap_set_flag_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_save_credentials),
- OR_AUTHCFG,
- FLAG,
- "Save and store credentials/tickets retrieved during auth."
- },
-
- {
- "KrbSaveTickets",
- ap_set_flag_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_save_credentials),
- OR_AUTHCFG,
- FLAG,
- "Alias for KrbSaveCredentials."
- },
-
- {
- "KrbTmpdir",
- ap_set_string_slot,
- (void*)XtOffsetOf(kerb_auth_config, krb_tmp_dir),
- RSRC_CONF & ACCESS_CONF,
- TAKE1,
- "Path to store ticket files and such in."
- },
-
- { NULL }
-};
+#ifdef HEIMDAL
+ problem = krb5_cc_gen_new(kcontext, &krb5_fcc_ops, &tmp_ccache);
#else
-#ifdef APXS2
-static const command_rec kerb_auth_cmds[] = {
- AP_INIT_TAKE1(
- "AuthKerberos",
- kerb_set_type_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_auth_type),
- OR_AUTHCFG,
- "Permit Kerberos auth without AuthType requirement."
- ),
+ problem = krb5_fcc_generate_new(kcontext, &tmp_ccache);
+ /* krb5_fcc_generate_new() doesn't set KRB5_TC_OPENCLOSE, which makes
+ krb5_cc_initialize() fail */
+ krb5_fcc_set_flags(kcontext, tmp_ccache, KRB5_TC_OPENCLOSE);
+#endif
+ if (problem) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot create file for new krb5 ccache: %s",
+ krb5_get_err_text(kcontext, problem));
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ goto end;
+ }
+
+ ccname = ap_pstrdup(r->pool, krb5_cc_get_name(kcontext, tmp_ccache));
+
+ problem = krb5_cc_initialize(kcontext, tmp_ccache, princ);
+ if (problem) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot initialize krb5 ccache %s: krb5_cc_initialize() failed: %s",
+ ccname, krb5_get_err_text(kcontext, problem));
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ goto end;
+ }
+
+ ap_table_setn(r->subprocess_env, "KRB5CCNAME", ccname);
+ ap_register_cleanup(r->pool, ccname,
+ krb5_cache_cleanup, ap_null_cleanup);
+
+ *ccache = tmp_ccache;
+ tmp_ccache = NULL;
+
+ ret = OK;
+
+end:
+ if (tmp_ccache)
+ krb5_cc_destroy(kcontext, tmp_ccache);
+
+ return ret;
+}
-#ifdef KRB4
- AP_INIT_TAKE1(
- "Krb4Srvtab",
- ap_set_file_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_4_srvtab),
- RSRC_CONF & ACCESS_CONF,
- "Location of Kerberos V4 srvtab file."
- ),
-#endif /* KRB4 */
+static int
+store_krb5_creds(krb5_context kcontext,
+ request_rec *r,
+ kerb_auth_config *conf,
+ krb5_ccache delegated_cred)
+{
+ char errstr[1024];
+ krb5_error_code problem;
+ krb5_principal princ;
+ krb5_ccache ccache;
+ int ret;
+
+ problem = krb5_cc_get_principal(kcontext, delegated_cred, &princ);
+ if (problem) {
+ snprintf(errstr, sizeof(errstr), "krb5_cc_get_principal() failed: %s",
+ krb5_get_err_text(kcontext, problem));
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ ret = create_krb5_ccache(kcontext, r, conf, princ, &ccache);
+ if (ret) {
+ krb5_free_principal(kcontext, princ);
+ return ret;
+ }
+
+#ifdef HEIMDAL
+ problem = krb5_cc_copy_cache(kcontext, delegated_cred, ccache);
+#else
+ problem = krb5_cc_copy_creds(kcontext, delegated_cred, ccache);
+#endif
+ krb5_free_principal(kcontext, princ);
+ if (problem) {
+ snprintf(errstr, sizeof(errstr), "Failed to store credentials: %s",
+ krb5_get_err_text(kcontext, problem));
+ krb5_cc_destroy(kcontext, ccache);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ krb5_cc_close(kcontext, ccache);
+ return OK;
+}
-#ifdef KRB5
- AP_INIT_TAKE1(
- "Krb5Keytab",
- ap_set_file_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_5_keytab),
- RSRC_CONF & ACCESS_CONF,
- "Location of Kerberos V5 keytab file."
- ),
-#endif /* KRB5 */
- AP_INIT_FLAG(
- "KrbAuthoritative",
- ap_set_flag_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_authoritative),
- OR_AUTHCFG,
- "Refuse to pass request down to lower modules."
- ),
-
- AP_INIT_TAKE1(
- "KrbDefaultRealm",
- ap_set_string_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_default_realm),
- OR_AUTHCFG,
- "Default realm to authenticate users against."
- ),
-
- AP_INIT_TAKE1(
- "KrbFailStatus",
- kerb_set_fail_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_fail_status),
- OR_AUTHCFG,
- "If auth fails, return status set here."
- ),
-
- AP_INIT_TAKE1(
- "KrbForceInstance",
- ap_set_string_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_force_instance),
- OR_AUTHCFG,
- "Force authentication against an instance specified here."
- ),
+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;
+ 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;
+
+ code = krb5_init_context(&kcontext);
+ if (code) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot initialize Kerberos5 context (%d)", code);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ 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");
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+#ifdef HEIMDAL
+ code = krb5_cc_gen_new(kcontext, &krb5_mcc_ops, &ccache);
+#else
+ code = krb5_mcc_generate_new(kcontext, &ccache);
+#endif
+ if (code) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot generate new ccache: %s",
+ krb5_get_err_text(kcontext, code));
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ goto end;
+ }
+
+ if (conf->krb_5_keytab)
+ krb5_kt_resolve(kcontext, conf->krb_5_keytab, &keytab);
+ /* setenv("KRB5_KTNAME", conf->krb_5_keytab, 1); */
+
+ realms = conf->krb_auth_realms;
+ do {
+ if (realms && (code = krb5_set_default_realm(kcontext,
+ ap_getword_white(r->pool, &realms))))
+ continue;
+
+ if (client) {
+ krb5_free_principal(kcontext, client);
+ client = NULL;
+ }
+ code = krb5_parse_name(kcontext, sent_name, &client);
+ if (code)
+ continue;
+
+ code = verify_krb5_user(r, kcontext, client, ccache, sent_pw, "khttp",
+ keytab);
+ if (code == 0)
+ break;
+
+ /* ap_getword_white() used above shifts the parameter, so it's not
+ needed to touch the realms variable */
+ } while (realms && *realms);
+
+ memset((char *)sent_pw, 0, strlen(sent_pw));
+
+ if (code) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Verifying krb5 password failed: %s",
+ krb5_get_err_text(kcontext, code));
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ code = krb5_unparse_name(kcontext, client, &name);
+ if (code) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "krb5_unparse_name() failed: %s",
+ krb5_get_err_text(kcontext, code));
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+ MK_USER = ap_pstrdup (r->pool, name);
+ MK_AUTH_TYPE = "Basic";
+ free(name);
+
+ if (conf->krb_save_credentials)
+ store_krb5_creds(kcontext, r, conf, ccache);
+
+ ret = OK;
+
+end:
+ if (client)
+ 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;
+}
-#ifdef KRB5
- AP_INIT_FLAG(
- "KrbForwardable",
- ap_set_flag_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_forwardable),
- OR_AUTHCFG,
- "Credentials retrieved will be flagged as forwardable."
- ),
-#endif /* KRB5 */
+/*********************************************************************
+ * GSSAPI Authentication
+ ********************************************************************/
- AP_INIT_TAKE1(
- "KrbLifetime",
- ap_set_string_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_lifetime),
- OR_AUTHCFG,
- "Lifetime of tickets retrieved."
- ),
+static const char *
+get_gss_error(MK_POOL *p, OM_uint32 error_status, char *prefix)
+{
+ OM_uint32 maj_stat, min_stat;
+ OM_uint32 msg_ctx = 0;
+ gss_buffer_desc status_string;
+ char buf[1024];
+ size_t len;
+
+ snprintf(buf, sizeof(buf), "%s", prefix);
+ len = strlen(buf);
+ do {
+ maj_stat = gss_display_status (&min_stat,
+ error_status,
+ GSS_C_MECH_CODE,
+ GSS_C_NO_OID,
+ &msg_ctx,
+ &status_string);
+ if (sizeof(buf) > len + status_string.length + 1) {
+ sprintf(buf+len, ": %s", (char*) status_string.value);
+ len += status_string.length;
+ }
+ gss_release_buffer(&min_stat, &status_string);
+ } while (!GSS_ERROR(maj_stat) && msg_ctx != 0);
+
+ return (ap_pstrdup(p, buf));
+}
-#ifdef KRB5
- AP_INIT_TAKE1(
- "KrbRenewable",
- ap_set_string_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_renewable),
- OR_AUTHCFG,
- "Credentials retrieved will be renewable for this length."
- ),
-#endif /* KRB5 */
+static int
+cleanup_gss_connection(void *data)
+{
+ OM_uint32 minor_status;
+ gss_connection_t *gss_conn = (gss_connection_t *)data;
- AP_INIT_FLAG(
- "KrbSaveCredentials",
- ap_set_flag_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_save_credentials),
- OR_AUTHCFG,
- "Save and store credentials/tickets retrieved during auth."
- ),
-
- AP_INIT_FLAG(
- "KrbSaveTickets",
- ap_set_flag_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_save_credentials),
- OR_AUTHCFG,
- "Alias for KrbSaveCredentials."
- ),
-
- AP_INIT_TAKE1(
- "KrbTmpdir",
- ap_set_string_slot,
- (void*)APR_XtOffsetOf(kerb_auth_config, krb_tmp_dir),
- RSRC_CONF & ACCESS_CONF,
- "Path to store ticket files and such in."
- ),
-
- { NULL }
-};
-#endif /* APXS2 */
-#endif /* APXS1 */
+ 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)
+{
+ OM_uint32 maj_stat, min_stat;
+ krb5_principal princ = NULL;
+ krb5_ccache ccache = NULL;
+ krb5_error_code problem;
+ krb5_context context;
+ int ret = HTTP_INTERNAL_SERVER_ERROR;
+
+ problem = krb5_init_context(&context);
+ if (problem) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "Cannot initialize krb5 context");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ problem = krb5_parse_name(context, princ_name, &princ);
+ if (problem) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot parse delegated username (%s)", krb5_get_err_text(context, problem));
+ goto end;
+ }
+
+ problem = create_krb5_ccache(context, r, conf, princ, &ccache);
+ if (problem) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot create krb5 ccache (%s)", krb5_get_err_text(context, problem));
+ goto end;
+ }
+
+ maj_stat = gss_krb5_copy_ccache(&min_stat, delegated_cred, ccache);
+ if (GSS_ERROR(maj_stat)) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot store delegated credential (%s)",
+ get_gss_error(r->pool, min_stat, "gss_krb5_copy_ccache"));
+ goto end;
+ }
+
+ krb5_cc_close(context, ccache);
+ ccache = NULL;
+ ret = 0;
+
+end:
+ if (princ)
+ krb5_free_principal(context, princ);
+ if (ccache)
+ krb5_cc_destroy(context, ccache);
+ krb5_free_context(context);
+ return ret;
+}
-/***************************************************************************
- Username/Password Validation
- ***************************************************************************/
-#ifdef KRB5
-int kerb5_password_validate(request_rec *r, const char *user, const char *pass)
+static int
+get_gss_creds(request_rec *r,
+ kerb_auth_config *conf,
+ gss_cred_id_t *server_creds)
{
- kerb_auth_config *conf =
- (kerb_auth_config *)ap_get_module_config(r->per_dir_config,
- &kerb_auth_module);
- int ret;
- krb5_context kcontext;
- krb5_principal server, me;
- krb5_creds my_creds;
- krb5_timestamp now;
- krb5_ccache ccache = NULL;
- krb5_deltat lifetime = 300; /* 5 minutes */
- krb5_deltat renewal = 0;
- krb5_flags options = 0;
- krb5_data tgtname = {
- 0,
- KRB5_TGS_NAME_SIZE,
- KRB5_TGS_NAME
- };
- char *c, ccname[MAX_STRING_LEN];
-
- if (krb5_init_context(&kcontext))
- return 0;
-
- if (conf->krb_save_credentials) {
- lifetime = 1800; /* 30 minutes */
-
- if (conf->krb_forwardable) {
- options |= KDC_OPT_FORWARDABLE;
- }
-
- if (conf->krb_renewable) {
- options |= KDC_OPT_RENEWABLE;
- renewal = 86400; /* 24 hours */
- }
-
- sprintf(ccname, "FILE:%s/k5cc_ap_%s",
- conf->krb_tmp_dir ? conf->krb_tmp_dir : "/tmp",
- MK_USER);
-
- for (c = ccname + strlen(conf->krb_tmp_dir ? conf->krb_tmp_dir :
- "/tmp") + 1; *c; c++) {
- if (*c == '/')
- *c = '.';
- }
-
- ap_table_setn(r->subprocess_env, "KRB5CCNAME", ccname);
- if (krb5_cc_set_default_name(kcontext, ccname)) {
- return 0;
- }
- unlink(ccname+strlen("FILE:"));
- }
-
- if (conf->krb_lifetime) {
- lifetime = atoi(conf->krb_lifetime);
- }
-
- memset((char *)&my_creds, 0, sizeof(my_creds));
- if(krb5_parse_name(kcontext, user, &me))
- return 0;
- my_creds.client = me;
-
- if (krb5_build_principal_ext(kcontext, &server,
- krb5_princ_realm(kcontext, me)->length,
- krb5_princ_realm(kcontext, me)->data,
- tgtname.length, tgtname.data,
- krb5_princ_realm(kcontext, me)->length,
- krb5_princ_realm(kcontext, me)->data,
- 0)) {
- return 0;
- }
- my_creds.server = server;
- if (krb5_timeofday(kcontext, &now))
- return 0;
- my_creds.times.starttime = 0;
- my_creds.times.endtime = now + lifetime;
- my_creds.times.renew_till = now + renewal;
-
- if (conf->krb_save_credentials) {
- if (krb5_cc_resolve(kcontext, ccname, &ccache))
- return 0;
-
- if (krb5_cc_initialize(kcontext, ccache, me))
- return 0;
- }
-
- ret = krb5_get_in_tkt_with_password(kcontext, options, 0, NULL, 0,
- pass, ccache, &my_creds, 0);
- if (ret) {
- return 0;
- }
-
- krb5_free_cred_contents(kcontext, &my_creds);
-
- return 1;
+ 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;
+
+ major_status = gss_import_name(&minor_status, &input_token,
+ GSS_C_NT_USER_NAME,
+ &server_name);
+ if (GSS_ERROR(major_status)) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "%s", get_gss_error(r->pool, minor_status,
+ "gss_import_name() failed"));
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ major_status = gss_acquire_cred(&minor_status, server_name, GSS_C_INDEFINITE,
+ GSS_C_NO_OID_SET, GSS_C_ACCEPT,
+ server_creds, NULL, NULL);
+ 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, minor_status,
+ "gss_acquire_cred() failed"));
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ return 0;
}
-#endif /* KRB5 */
-#ifdef KRB4
-int kerb4_password_validate(request_rec *r, const char *user, const char *pass)
+static int
+authenticate_user_gss(request_rec *r,
+ kerb_auth_config *conf,
+ const char *auth_line)
{
- kerb_auth_config *conf =
- (kerb_auth_config *)ap_get_module_config(r->per_dir_config,
- &kerb_auth_module);
- int ret;
- int lifetime = DEFAULT_TKT_LIFE;
- char *c, *tfname;
- char *username = NULL;
- char *instance = NULL;
- char *realm = NULL;
-
- username = (char *)ap_pstrdup(r->pool, user);
- if (!username) {
- return 0;
- }
-
- instance = strchr(username, '.');
- if (instance) {
- *instance++ = '\0';
- }
- else {
- instance = "";
- }
-
- realm = strchr(username, '@');
- if (realm) {
- *realm++ = '\0';
- }
- else {
- realm = "";
- }
-
- if (conf->krb_lifetime) {
- lifetime = atoi(conf->krb_lifetime);
- }
-
- if (conf->krb_force_instance) {
- instance = conf->krb_force_instance;
- }
-
- if (conf->krb_save_credentials) {
- tfname = (char *)malloc(sizeof(char) * MAX_STRING_LEN);
- sprintf(tfname, "%s/k5cc_ap_%s",
- conf->krb_tmp_dir ? conf->krb_tmp_dir : "/tmp",
- MK_USER);
-
- if (!strcmp(instance, "")) {
- tfname = strcat(tfname, ".");
- tfname = strcat(tfname, instance);
- }
-
- if (!strcmp(realm, "")) {
- tfname = strcat(tfname, ".");
- tfname = strcat(tfname, realm);
- }
-
- for (c = tfname + strlen(conf->krb_tmp_dir ? conf->krb_tmp_dir :
- "/tmp") + 1; *c; c++) {
- if (*c == '/')
- *c = '.';
- }
-
- krb_set_tkt_string(tfname);
- }
-
- if (!strcmp(realm, "")) {
- realm = (char *)malloc(sizeof(char) * (REALM_SZ + 1));
- ret = krb_get_lrealm(realm, 1);
- if (ret != KSUCCESS)
- return 0;
- }
-
- ret = krb_get_pw_in_tkt((char *)user, instance, realm, "krbtgt", realm,
- lifetime, (char *)pass);
- switch (ret) {
- case INTK_OK:
- case INTK_W_NOTALL:
- return 1;
- break;
-
- default:
- return 0;
- break;
- }
+ OM_uint32 major_status, minor_status, minor_status2;
+ gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
+ gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
+ const char *auth_param = NULL;
+ int ret;
+ gss_name_t client_name = GSS_C_NO_NAME;
+ gss_cred_id_t delegated_cred = GSS_C_NO_CREDENTIAL;
+ static int initial_return = HTTP_UNAUTHORIZED;
+
+ /* needed to work around replay caches */
+ if (!ap_is_initial_req(r))
+ return initial_return;
+ initial_return = HTTP_UNAUTHORIZED;
+
+ 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)
+ setenv("KRB5_KTNAME", conf->krb_5_keytab, 1);
+
+ if (gss_connection->server_creds == GSS_C_NO_CREDENTIAL) {
+ ret = get_gss_creds(r, conf, &gss_connection->server_creds);
+ if (ret)
+ goto end;
+ }
+
+ /* ap_getword() shifts parameter */
+ auth_param = ap_getword_white(r->pool, &auth_line);
+ if (auth_param == NULL) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "No Authorization parameter in request from client");
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ input_token.length = ap_base64decode_len(auth_param) + 1;
+ input_token.value = ap_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);
+
+ major_status = gss_accept_sec_context(&minor_status,
+ &gss_connection->context,
+ gss_connection->server_creds,
+ &input_token,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ &client_name,
+ NULL,
+ &output_token,
+ NULL,
+ NULL,
+ &delegated_cred);
+ 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);
+ if (token == NULL) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "ap_pcalloc() failed (not enough memory)");
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ gss_release_buffer(&minor_status2, &output_token);
+ goto end;
+ }
+ ap_base64encode(token, output_token.value, output_token.length);
+ token[len] = '\0';
+ ap_table_set(r->err_headers_out, "WWW-Authenticate",
+ ap_pstrcat(r->pool, "GSS-Negotiate ", token, NULL));
+ gss_release_buffer(&minor_status2, &output_token);
+ }
+
+ if (GSS_ERROR(major_status)) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "%s", get_gss_error(r->pool, minor_status,
+ "gss_accept_sec_context() failed"));
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ 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;
+ }
+
+ 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, minor_status,
+ "gss_export_name() failed"));
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ goto end;
+ }
+
+ MK_AUTH_TYPE = "Negotiate";
+ MK_USER = ap_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;
+
+end:
+ if (delegated_cred)
+ gss_release_cred(&minor_status, &delegated_cred);
+
+ if (output_token.length)
+ gss_release_buffer(&minor_status, &output_token);
+
+ if (client_name != GSS_C_NO_NAME)
+ gss_release_name(&minor_status, &client_name);
+
+ cleanup_gss_connection(gss_connection);
+
+ initial_return = ret;
+ return ret;
}
-#endif /* KRB4 */
+#endif /* KRB5 */
+static void
+note_kerb_auth_failure(request_rec *r, const kerb_auth_config *conf,
+ int use_krb4, int use_krb5)
+{
+ const char *auth_name = NULL;
+ int set_basic = 0;
+ /* get the user realm specified in .htaccess */
+ auth_name = ap_auth_name(r);
-/***************************************************************************
- User Authentication
- ***************************************************************************/
-int kerb_authenticate_user(request_rec *r)
-{
- const char *name; /* AuthName specified */
- const char *type; /* AuthType specified */
- int KerberosV5 = 0; /* Kerberos V5 check enabled */
- int KerberosV4 = 0; /* Kerberos V4 check enabled */
- int KerberosV4first = 0; /* Kerberos V4 check first */
- const char *sent_pw; /* Password sent by browser */
- int res; /* Response holder */
- int retcode; /* Return code holder */
- const char *t; /* Decoded auth_line */
- const char *authtype; /* AuthType to send back to browser */
- const char *auth_line = MK_TABLE_GET(r->headers_in,
- (r->proxyreq == MK_PROXY)
- ? "Proxy-Authorization"
- : "Authorization");
- kerb_auth_config *conf =
- (kerb_auth_config *)ap_get_module_config(r->per_dir_config,
- &kerb_auth_module);
-
- type = ap_auth_type(r);
-
- if (type != NULL) {
+ /* XXX should the WWW-Authenticate header be cleared first? */
#ifdef KRB5
- if ((strncasecmp(type, "KerberosV5", 10) == 0) ||
- (strncasecmp(conf->krb_auth_type, "KerberosV5", 10) == 0)) {
- KerberosV5 = 1;
- }
-#endif /* KRB5 */
+ if (use_krb5 && conf->krb_method_gssapi)
+ ap_table_add(r->err_headers_out, "WWW-Authenticate", "GSS-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));
+ set_basic = 1;
+ }
+#endif
#ifdef KRB4
- if ((strncasecmp(type, "KerberosV4", 10) == 0) ||
- (strncasecmp(conf->krb_auth_type, "KerberosV4", 10) == 0)) {
- KerberosV4 = 1;
- }
-#endif /* 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));
+#endif
+}
-#if defined(KRB5) && defined(KRB4)
- if ((strncasecmp(type, "KerberosDualV5V4", 15) == 0) ||
- (strncasecmp(conf->krb_auth_type, "KerberosDualV5V4", 15) == 0)) {
- KerberosV5 = 1;
- KerberosV4 = 1;
- }
-
- if ((strncasecmp(type, "KerberosDualV4V5", 15) == 0) ||
- (strncasecmp(conf->krb_auth_type, "KerberosDualV4V5", 15) == 0)) {
- KerberosV5 = 1;
- KerberosV4 = 1;
- KerberosV4first = 1;
- }
-#endif /* KRB5 && KRB4 */
- }
-
- if (!KerberosV4 && !KerberosV5) {
- if (conf->krb_authoritative) {
- return HTTP_UNAUTHORIZED;
- }
- else {
- return DECLINED;
- }
- }
-
- name = ap_auth_name(r);
- if (!name) {
- return HTTP_INTERNAL_SERVER_ERROR;
- }
-
- if (!auth_line) {
- MK_TABLE_SET(r->err_headers_out, "WWW-Authenticate",
- (char *)ap_pstrcat(r->pool,
- "Basic realm=\"", name, "\"", NULL));
- return HTTP_UNAUTHORIZED;
- }
-
- type = ap_getword_white(r->pool, &auth_line);
- t = ap_pbase64decode(r->pool, auth_line);
- MK_USER = ap_getword_nulls(r->pool, &t, ':');
- MK_AUTH_TYPE = "Kerberos";
- sent_pw = ap_getword_white(r->pool, &t);
-
- retcode = DECLINED;
+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);
+ const char *auth_type = NULL;
+ const char *auth_line = NULL;
+ const char *type = NULL;
+ int use_krb5 = 0, use_krb4 = 0;
+ int ret;
+
+ /* get the type specified in .htaccess */
+ type = ap_auth_type(r);
+
+ if (type && strcasecmp(type, "Kerberos") == 0)
+ use_krb5 = use_krb4 = 1;
+ else if(type && strcasecmp(type, "KerberosV5") == 0)
+ use_krb4 = 0;
+ else if(type && strcasecmp(type, "KerberosV4") == 0)
+ use_krb5 = 0;
+ else
+ return DECLINED;
+
+ /* get what the user sent us in the HTTP header */
+ auth_line = MK_TABLE_GET(r->headers_in, "Authorization");
+ if (!auth_line) {
+ note_kerb_auth_failure(r, conf, use_krb4, use_krb5);
+ return HTTP_UNAUTHORIZED;
+ }
+ auth_type = ap_getword_white(r->pool, &auth_line);
+
+ ret = HTTP_UNAUTHORIZED;
#ifdef KRB5
- if (KerberosV5 && !KerberosV4first && retcode != OK) {
- MK_AUTH_TYPE = "KerberosV5";
- if (kerb5_password_validate(r, MK_USER, sent_pw)) {
- retcode = OK;
- }
- else {
- retcode = conf->krb_fail_status;
- }
- }
-#endif /* KRB5 */
+ if (use_krb5 && conf->krb_method_gssapi &&
+ strcasecmp(auth_type, "GSS-Negotiate") == 0) {
+ ret = authenticate_user_gss(r, conf, auth_line);
+ } else if (use_krb5 && conf->krb_method_k5pass &&
+ strcasecmp(auth_type, "Basic") == 0) {
+ ret = authenticate_user_krb5pwd(r, conf, auth_line);
+ }
+#endif
#ifdef KRB4
- if (KerberosV4 && retcode != OK) {
- MK_AUTH_TYPE = "KerberosV4";
- if (kerb4_password_validate(r, MK_USER, sent_pw)) {
- retcode = OK;
- }
- else {
- retcode = conf->krb_fail_status;
- }
- }
-#endif /* KRB4 */
-
-#if defined(KRB5) && defined(KRB4)
- if (KerberosV5 && KerberosV4first && retcode != OK) {
- MK_AUTH_TYPE = "KerberosV5";
- if (kerb5_password_validate(r, MK_USER, sent_pw)) {
- retcode = OK;
- }
- else {
- retcode = conf->krb_fail_status;
- }
- }
-#endif /* KRB5 && KRB4 */
-
- if (conf->krb_authoritative && retcode == DECLINED) {
- return HTTP_UNAUTHORIZED;
- }
- else {
- return retcode;
- }
-}
+ if (ret == HTTP_UNAUTHORIZED && use_krb4 && conf->krb_method_k4pass &&
+ strcasecmp(auth_type, "Basic") == 0)
+ ret = authenticate_user_krb4pwd(r, conf, auth_line);
+#endif
+ if (ret == HTTP_UNAUTHORIZED)
+ note_kerb_auth_failure(r, conf, use_krb4, use_krb5);
-
-
-/***************************************************************************
- Access Verification
- ***************************************************************************/
-int kerb_check_user_access(request_rec *r)
-{
- register int x;
- const char *t, *w;
- const MK_ARRAY_HEADER *reqs_arr = ap_requires(r);
- require_line *reqs;
- kerb_auth_config *conf =
- (kerb_auth_config *)ap_get_module_config(r->per_dir_config,
- &kerb_auth_module);
-
- if (reqs_arr == NULL) {
- return OK;
- }
- reqs = (require_line *)reqs_arr->elts;
-
- for (x = 0; x < reqs_arr->nelts; x++) {
- t = reqs[x].requirement;
- w = ap_getword_white(r->pool, &t);
- if (strcmp(w, "realm") == 0) {
- while (t[0] != '\0') {
- w = ap_getword_conf(r->pool, &t);
- if (strcmp(MK_USER, w) == 0) {
- return OK;
- }
- }
- }
- }
-
- return DECLINED;
+ return ret;
}
-
-
/***************************************************************************
Module Setup/Configuration
***************************************************************************/
#ifdef APXS1
-module MODULE_VAR_EXPORT kerb_auth_module = {
+module MODULE_VAR_EXPORT auth_kerb_module = {
STANDARD_MODULE_STUFF,
NULL, /* module initializer */
- kerb_dir_config, /* per-directory config creator */
+ kerb_dir_create_config, /* per-directory config creator */
NULL, /* per-directory config merger */
NULL, /* per-server config creator */
NULL, /* per-server config merger */
NULL, /* [ 9] content handlers */
NULL, /* [ 2] URI-to-filename translation */
kerb_authenticate_user, /* [ 5] check/validate user_id */
- kerb_check_user_access, /* [ 6] check user_id is valid *here* */
+ NULL, /* [ 6] check user_id is valid *here* */
NULL, /* [ 4] check access by host address */
NULL, /* [ 7] MIME type checker/setter */
NULL, /* [ 8] fixups */
NULL, /* process initialization */
NULL, /* process exit/cleanup */
NULL /* [ 1] post read_request handling */
-#ifdef EAPI
- , /* EAPI Additions */
- NULL, /* EAPI add module */
- NULL, /* EAPI remove module */
- NULL, /* EAPI rewrite command */
- NULL /* EAPI new connection */
-#endif /* EAPI */
};
#else
-#ifdef APXS2
void kerb_register_hooks(apr_pool_t *p)
{
- ap_hook_check_user_id(kerb_authenticate_user, NULL, NULL, APR_HOOK_MIDDLE);
- ap_hook_access_checker(kerb_check_user_access, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_check_user_id(kerb_authenticate_user, NULL, NULL, APR_HOOK_MIDDLE);
}
-module AP_MODULE_DECLARE_DATA kerb_auth_module =
+module AP_MODULE_DECLARE_DATA auth_kerb_module =
{
- STANDARD20_MODULE_STUFF,
- kerb_dir_config, /* create per-dir conf structures */
- NULL, /* merge per-dir conf structures */
- NULL, /* create per-server conf structures */
- NULL, /* merge per-server conf structures */
- kerb_auth_cmds, /* table of configuration directives */
- kerb_register_hooks /* register hooks */
+ STANDARD20_MODULE_STUFF,
+ kerb_dir_create_config, /* create per-dir conf structures */
+ NULL, /* merge per-dir conf structures */
+ NULL, /* create per-server conf structures */
+ NULL, /* merge per-server conf structures */
+ kerb_auth_cmds, /* table of configuration directives */
+ kerb_register_hooks /* register hooks */
};
-#endif /* APXS2 */
-#endif /* APXS1 */
+#endif
projects / mod_auth_kerb.cvs / .git / blobdiff