+/*
+ * Daniel Kouril <kouril@users.sourceforge.net>
+ *
+ * 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>
+ * Ludek Sulak <xsulak@fi.muni.cz>
+ */
+
+/*
+ * Copyright (c) 2004 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:
+ *
+ * 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. 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 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 "httpd.h"
-#include "http_config.h"
-#include "http_core.h"
-#include "http_log.h"
-#include "http_protocol.h"
-#include "http_request.h"
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#define MODAUTHKERB_VERSION "5.0-rc6"
+#define MECH_NEGOTIATE "Negotiate"
+
+#include <httpd.h>
+#include <http_config.h>
+#include <http_core.h>
+#include <http_log.h>
+#include <http_protocol.h>
+#include <http_request.h>
+
+#ifdef STANDARD20_MODULE_STUFF
+#include <ap_compat.h>
+#include <apr_strings.h>
+#include <apr_base64.h>
+#endif
#ifdef KRB5
#include <krb5.h>
-#include <gssapi.h>
+#ifdef HEIMDAL
+# include <gssapi.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 krb5_get_err_text(context,code) error_message(code)
+#endif
+#include "spnegokrb5.h"
#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>
+#include <netdb.h> /* gethostbyname() */
#endif /* KRB4 */
-#ifdef APXS1
-module kerb_auth_module;
+#ifdef WIN32
+#define vsnprintf _vsnprintf
+#define snprintf _snprintf
+#else
+/* XXX remove dependency on unistd.h ??? */
+#include <unistd.h>
+#endif
+
+#ifdef STANDARD20_MODULE_STUFF
+module AP_MODULE_DECLARE_DATA auth_kerb_module;
#else
-module AP_MODULE_DECLARE_DATA kerb_auth_module;
+module auth_kerb_module;
#endif
/***************************************************************************
Macros To Ease Compatibility
***************************************************************************/
-#ifdef APXS1
-#define MK_POOL pool
-#define MK_TABLE_GET ap_table_get
-#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 STANDARD20_MODULE_STUFF
#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 /* 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
***************************************************************************/
typedef struct {
- int krb_auth_enable;
char *krb_auth_realms;
- int krb_fail_status;
- char *krb_force_instance;
int krb_save_credentials;
- char *krb_tmp_dir;
- char *service_name;
- char *krb_lifetime;
+ int krb_verify_kdc;
+ char *krb_service_name;
+ int krb_authoritative;
+ int krb_delegate_basic;
#ifdef KRB5
char *krb_5_keytab;
- int krb_forwardable;
int krb_method_gssapi;
int krb_method_k5pass;
#endif
#endif
} kerb_auth_config;
-#ifdef APXS1
+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);
+
+#ifdef STANDARD20_MODULE_STUFF
+#define command(name, func, var, type, usage) \
+ AP_INIT_ ## type (name, func, \
+ (void*)APR_XtOffsetOf(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[] = {
- command("AuthKerberos", ap_set_flag_slot, krb_auth_enable,
- FLAG, "Permit Kerberos auth without AuthType requirement."),
-
- command("KrbAuthRealm", ap_set_string_slot, krb_auth_realms,
- ITERATE, "Realms to attempt authentication against (can be multiple)."),
+ command("KrbAuthRealms", krb5_save_realms, krb_auth_realms,
+ RAW_ARGS, "Realms to attempt authentication against (can be multiple)."),
- command("KrbAuthRealm", ap_set_string_slot, krb_auth_realms,
- ITERATE, "Alias for KrbAuthRealm."),
-
-#if 0
- command("KrbFailStatus", kerb_set_fail_slot, krb_fail_status,
- TAKE1, "If auth fails, return status set here."),
-#endif
-
- command("KrbForceInstance", ap_set_string_slot, krb_force_instance,
- TAKE1, "Force authentication against an instance specified here."),
+ 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."),
- command("KrbSaveTickets", ap_set_flag_slot, krb_save_credentials,
- FLAG, "Alias for KrbSaveCredentials."),
+ command("KrbVerifyKDC", ap_set_flag_slot, krb_verify_kdc,
+ FLAG, "Verify tickets against keytab to prevent KDC spoofing attacks."),
- command("KrbTmpdir", ap_set_string_slot, krb_tmp_dir,
- TAKE1, "Path to store ticket files and such in."),
+ command("KrbServiceName", ap_set_string_slot, krb_service_name,
+ TAKE1, "Service name to be used by Apache for authentication."),
- command("KrbServiceName", ap_set_string_slot, service_name,
- TAKE1, "Kerberos service name to be used by apache."),
+ command("KrbAuthoritative", ap_set_flag_slot, krb_authoritative,
+ FLAG, "Set to 'off' to allow access control to be passed along to lower modules iff the UserID is not known to this module."),
-#if 0
- command("KrbLifetime", ap_set_string_slot, krb_lifetime,
- TAKE1, "Kerberos ticket lifetime."),
-#endif
+ 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."),
#ifdef KRB5
command("Krb5Keytab", ap_set_file_slot, krb_5_keytab,
TAKE1, "Location of Kerberos V5 keytab file."),
- command("KrbForwardable", ap_set_flag_slot, krb_forwardable,
- FLAG, "Credentials retrieved will be flagged as forwardable."),
-
- command("KrbMethodGSSAPI", ap_set_flag_slot, krb_method_gssapi,
- FLAG, "Enable GSSAPI authentication."),
+ 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."),
#endif
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;
+#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"
-static gss_connection_t *gss_connection = NULL;
+/* This is our replacement krb5_rc_store function */
+static krb5_error_code
+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
kerb_auth_config *rec;
rec = (kerb_auth_config *) ap_pcalloc(p, sizeof(kerb_auth_config));
- ((kerb_auth_config *)rec)->krb_auth_enable = 1;
- ((kerb_auth_config *)rec)->krb_fail_status = HTTP_UNAUTHORIZED;
+ ((kerb_auth_config *)rec)->krb_verify_kdc = 1;
+ ((kerb_auth_config *)rec)->krb_service_name = "HTTP";
+ ((kerb_auth_config *)rec)->krb_authoritative = 1;
+ ((kerb_auth_config *)rec)->krb_delegate_basic = 0;
#ifdef KRB5
((kerb_auth_config *)rec)->krb_method_k5pass = 1;
((kerb_auth_config *)rec)->krb_method_gssapi = 1;
return rec;
}
-
-#if 0
-static const char *kerb_set_fail_slot(cmd_parms *cmd, void *struct_ptr,
- const char *arg)
+static const char*
+krb5_save_realms(cmd_parms *cmd, kerb_auth_config *sec, char *arg)
{
- 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;
+ 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);
+
+
+#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, r, "%s", errstr);
#endif
+}
#ifdef KRB4
/***************************************************************************
Username/Password Validation for Krb4
***************************************************************************/
-int kerb4_password_validate(request_rec *r, const char *user, const char *pass)
+static int
+verify_krb4_user(request_rec *r, char *name, char *instance, char *realm,
+ char *password, char *linstance, char *srvtab, int krb_verify_kdc)
{
- 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;
- }
+ 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_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot get krb4 ticket: krb_get_pw_in_tkt() failed: %s",
+ krb_get_err_text(ret));
+ return ret;
+ }
+
+ if (!krb_verify_kdc)
+ return ret;
+
+ hostname = ap_get_server_name(r);
+
+ hp = gethostbyname(hostname);
+ if (hp == NULL) {
+ dest_tkt();
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot verify krb4 ticket: gethostbyname() failed: %s",
+ hstrerror(h_errno));
+ 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) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot verify krb4 ticket: krb_mk_req() failed: %s",
+ krb_get_err_text(ret));
+ dest_tkt();
+ return ret;
+ }
+
+ ret = krb_rd_req(&ticket, linstance, phost, addr, &authdata, srvtab);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot verify krb4 ticket: krb_rd_req() failed: %s",
+ krb_get_err_text(ret));
+ dest_tkt();
+ }
+
+ return ret;
+}
+
+static int
+krb4_cache_cleanup(void *data)
+{
+ char *tkt_file = (char *) data;
+
+ krb_set_tkt_string(tkt_file);
+ dest_tkt();
+ return OK;
+}
+
+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];
+ 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_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);
+
+ all_principals_unkown = 1;
+ 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);
+ if (ret)
+ break;
+ realm = lrealm;
+ }
+
+ ret = verify_krb4_user(r, (char *)sent_name,
+ (sent_instance) ? sent_instance : "",
+ (char *)realm, (char *)sent_pw,
+ conf->krb_service_name,
+ conf->krb_4_srvtab, conf->krb_verify_kdc);
+ if (!conf->krb_authoritative && ret) {
+ /* 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 */
+ if (all_principals_unkown && ret != KDC_PR_UNKNOWN)
+ all_principals_unkown = 0;
+ }
+
+ if (ret == 0)
+ break;
+ } while (realms && *realms);
+
+ if (ret) {
+ /* XXX log only in the verify_krb4_user() call */
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "Verifying krb4 password failed");
+ ret = (!conf->krb_authoritative && all_principals_unkown == 1 && ret == KDC_PR_UNKNOWN) ?
+ DECLINED : 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 */
/***************************************************************************
Username/Password Validation for Krb5
***************************************************************************/
-#ifndef HEIMDAL
-krb5_error_code
-krb5_verify_user(krb5_context context, krb5_principal principal,
- krb5_ccache ccache, const char *password, krb5_boolean secure,
- const char *service)
+
+/* 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)
{
- int ret;
- krb5_context kcontext;
- krb5_principal server, client;
- krb5_timestamp now;
- krb5_creds my_creds;
- krb5_flags options = 0;
- krb5_principal me = NULL;
- krb5_data tgtname = {
- 0,
- KRB5_TGS_NAME_SIZE,
- KRB5_TGS_NAME
- };
-
- memset((char *)&my_creds, 0, sizeof(my_creds));
- my_creds.client = principal;
-
- 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 ret;
+ 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;
+
+ ret = krb5_cc_resolve(context, "MEMORY:", &local_ccache);
+ 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,
+ const char *password, const char *service, krb5_keytab keytab,
+ int krb_verify_kdc, krb5_ccache *ccache)
+{
+ krb5_creds creds;
+ krb5_principal server = NULL;
+ krb5_error_code ret;
+ krb5_ccache ret_ccache = NULL;
+ char *name = NULL;
+
+ /* 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_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_get_init_creds_password(context, &creds, principal,
+ (char *)password, NULL,
+ NULL, 0, NULL, NULL);
+ 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;
}
- my_creds.server = server;
- if (krb5_timeofday(kcontext, &now))
- return -1;
+ ret = krb5_sname_to_principal(context, ap_get_server_name(r), service,
+ KRB5_NT_SRV_HST, &server);
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_sname_to_principal() failed: %s",
+ krb5_get_err_text(context, ret));
+ goto end;
+ }
+ /* XXX log_debug: lookig for <server_princ> in keytab */
- my_creds.times.starttime = 0;
/* XXX
- my_creds.times.endtime = now + lifetime;
- my_creds.times.renew_till = now + renewal;
+ {
+ char *realm;
+
+ 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);
+ }
*/
- ret = krb5_get_in_tkt_with_password(kcontext, options, 0, NULL, 0,
- password, ccache, &my_creds, 0);
+ 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;
+ }
+
+ ret = krb5_cc_resolve(context, "MEMORY:", &ret_ccache);
if (ret) {
- return ret;
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "generating new memory ccache failed: %s",
+ krb5_get_err_text(context, ret));
+ goto end;
}
- return 0;
-}
-#endif
+ 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;
-static void
+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;
+}
+
+static int
krb5_cache_cleanup(void *data)
{
krb5_context context;
problem = krb5_init_context(&context);
if (problem) {
- ap_log_error(APLOG_MARK, APLOG_ERR, NULL, "krb5_init_context() failed");
- return;
+ /* 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) {
- ap_log_error(APLOG_MARK, APLOG_ERR, NULL,
- "krb5_cc_resolve() failed (%s: %s)",
- cache_name, krb5_get_err_text(context, problem));
- return;
+ /* 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;
}
static int
krb5_principal princ,
krb5_ccache *ccache)
{
- char *c, ccname[MAX_STRING_LEN];
- krb5_error_code problem;
- char errstr[1024];
- int ret;
- krb5_ccache tmp_ccache = NULL;
-
- snprintf(ccname, sizeof(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 = '.';
- }
-
- problem = krb5_cc_resolve(kcontext, ccname, &tmp_ccache);
- if (problem) {
- snprintf(errstr, sizeof(errstr),
- "krb5_cc_resolve() failed: %s",
- krb5_get_err_text(kcontext, problem));
- ap_log_reason (errstr, r->uri, r);
- ret = SERVER_ERROR;
- goto end;
- }
-
- problem = krb5_cc_initialize(kcontext, tmp_ccache, princ);
- if (problem) {
- snprintf(errstr, sizeof(errstr),
- "krb5_cc_initialize() failed: %s",
- krb5_get_err_text(kcontext, problem));
- ap_log_reason (errstr, r->uri, r);
- ret = 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;
+ char *ccname;
+ int fd;
+ krb5_error_code problem;
+ int ret;
+ krb5_ccache tmp_ccache = NULL;
+
+ ccname = ap_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,
+ "mkstemp() failed: %s", strerror(errno));
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ goto end;
+ }
+ close(fd);
+
+ problem = krb5_cc_resolve(kcontext, ccname, &tmp_ccache);
+ if (problem) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_cc_resolve() failed: %s",
+ krb5_get_err_text(kcontext, problem));
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ unlink(ccname);
+ goto end;
+ }
+
+ 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);
+ if (tmp_ccache)
+ krb5_cc_destroy(kcontext, tmp_ccache);
- return ret;
+ return ret;
}
static int
if (problem) {
snprintf(errstr, sizeof(errstr), "krb5_cc_get_principal() failed: %s",
krb5_get_err_text(kcontext, problem));
- return SERVER_ERROR;
+ return HTTP_INTERNAL_SERVER_ERROR;
}
ret = create_krb5_ccache(kcontext, r, conf, princ, &ccache);
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), "krb5_cc_copy_cache() failed: %s",
+ snprintf(errstr, sizeof(errstr), "Failed to store credentials: %s",
krb5_get_err_text(kcontext, problem));
krb5_cc_destroy(kcontext, ccache);
- return SERVER_ERROR;
+ return HTTP_INTERNAL_SERVER_ERROR;
}
krb5_cc_close(kcontext, ccache);
const char *auth_line)
{
const char *sent_pw = NULL;
+ const char *sent_name = NULL;
const char *realms = NULL;
- krb5_context kcontext;
+ const char *realm = 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;
+ int all_principals_unkown;
code = krb5_init_context(&kcontext);
if (code) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO, r,
- "Cannot initialize Kerberos5 context (%d)", code);
- return SERVER_ERROR;
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot initialize Kerberos5 context (%d)", code);
+ return HTTP_INTERNAL_SERVER_ERROR;
}
- sent_pw = ap_uudecode(r->pool, auth_line);
- r->connection->user = ap_getword (r->pool, &sent_pw, ':');
- r->connection->ap_auth_type = "Basic";
-
+ 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(r->connection->user,'@')) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO, r,
- "specifying realm in user name is prohibited");
+ 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) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO, r,
- "Cannot generate new ccache: %s",
- krb5_get_err_text(kcontext, code));
- ret = SERVER_ERROR;
+ if (sent_pw == NULL || *sent_pw == '\0') {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "empty passwords are not accepted");
+ ret = HTTP_UNAUTHORIZED;
goto end;
}
+ if (conf->krb_5_keytab)
+ krb5_kt_resolve(kcontext, conf->krb_5_keytab, &keytab);
+
+ all_principals_unkown = 1;
realms = conf->krb_auth_realms;
do {
- if (realms && krb5_set_default_realm(kcontext,
- ap_getword_white(r->pool, &realms)))
- continue;
+ name = sent_name;
+ if (realms && (realm = ap_getword_white(r->pool, &realms)))
+ name = ap_psprintf(r->pool, "%s@%s", sent_name, realm);
+
+ if (client) {
+ krb5_free_principal(kcontext, client);
+ client = NULL;
+ }
- code = krb5_parse_name(kcontext, r->connection->user, &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, sent_pw,
+ conf->krb_service_name,
+ keytab, conf->krb_verify_kdc, &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 */
+ if (all_principals_unkown && code != KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN)
+ all_principals_unkown = 0;
+ }
- code = krb5_verify_user(kcontext, client, ccache, sent_pw, 1, "khttp");
- krb5_free_principal(kcontext, client);
if (code == 0)
break;
memset((char *)sent_pw, 0, strlen(sent_pw));
if (code) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO, r,
- "Verifying krb5 password failed: %s",
- krb5_get_err_text(kcontext, code));
- ret = HTTP_UNAUTHORIZED;
+ if (!conf->krb_authoritative && all_principals_unkown == 1 && code == KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN)
+ ret = DECLINED;
+ else
+ ret = HTTP_UNAUTHORIZED;
+
goto end;
}
- if (conf->krb_save_credentials) {
- ret = store_krb5_creds(kcontext, r, conf, ccache);
- if (ret) /* Ignore error ?? */
- 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:
+ 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 (ccache)
krb5_cc_destroy(kcontext, ccache);
+ if (keytab)
+ krb5_kt_close(kcontext, keytab);
krb5_free_context(kcontext);
return ret;
********************************************************************/
static const char *
-get_gss_error(pool *p, OM_uint32 error_status, char *prefix)
+get_gss_error(MK_POOL *p, OM_uint32 err_maj, OM_uint32 err_min, char *prefix)
{
- OM_uint32 maj_stat, min_stat;
+ OM_uint32 maj_stat, min_stat;
OM_uint32 msg_ctx = 0;
gss_buffer_desc status_string;
- char buf[1024];
- size_t len;
+ char *err_msg;
- snprintf(buf, sizeof(buf), "%s: ", prefix);
- len = strlen(buf);
+ err_msg = ap_pstrdup(p, prefix);
do {
maj_stat = gss_display_status (&min_stat,
- error_status,
- GSS_C_MECH_CODE,
+ err_maj,
+ GSS_C_GSS_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;
- }
+ if (GSS_ERROR(maj_stat))
+ break;
+ err_msg = ap_pstrcat(p, err_msg, ": ", (char*) status_string.value, NULL);
gss_release_buffer(&min_stat, &status_string);
+
+ maj_stat = gss_display_status (&min_stat,
+ err_min,
+ GSS_C_MECH_CODE,
+ GSS_C_NULL_OID,
+ &msg_ctx,
+ &status_string);
+ if (!GSS_ERROR(maj_stat)) {
+ err_msg = ap_pstrcat(p, err_msg,
+ " (", (char*) status_string.value, ")", NULL);
+ gss_release_buffer(&min_stat, &status_string);
+ }
} while (!GSS_ERROR(maj_stat) && msg_ctx != 0);
- return (ap_pstrdup(p, buf));
-}
-
-static void
-cleanup_gss_connection(void *data)
-{
- OM_uint32 minor_status;
- gss_connection_t *gss_conn = (gss_connection_t *)data;
-
- if (data == NULL)
- return;
- 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);
+ return err_msg;
}
static int
krb5_ccache ccache = NULL;
krb5_error_code problem;
krb5_context context;
- int ret = SERVER_ERROR;
+ int ret = HTTP_INTERNAL_SERVER_ERROR;
problem = krb5_init_context(&context);
if (problem) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "Cannot initialize krb5 context");
- return SERVER_ERROR;
+ 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) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
+ 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) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
+ 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)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Cannot store delegated credential (%s)",
- get_gss_error(r->pool, min_stat, "gss_krb5_copy_ccache"));
+ get_gss_error(r->pool, 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];
- if (conf->service_name) {
- input_token.value = conf->service_name;
- input_token.length = strlen(conf->service_name) + 1;
- }
- else {
- input_token.value = "khttp";
- input_token.length = 6;
- }
- major_status = gss_import_name(&minor_status, &input_token,
- (conf->service_name) ?
- GSS_C_NT_USER_NAME : GSS_C_NT_HOSTBASED_SERVICE,
+ snprintf(buf, sizeof(buf), "%s@%s", conf->krb_service_name,
+ ap_get_server_name(r));
+
+ token.value = buf;
+ token.length = strlen(buf) + 1;
+
+ major_status = gss_import_name(&minor_status, &token,
+ GSS_C_NT_HOSTBASED_SERVICE,
&server_name);
+ memset(&token, 0, sizeof(token));
if (GSS_ERROR(major_status)) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
- "%s", get_gss_error(r->pool, minor_status,
- "gss_import_name() failed"));
- return SERVER_ERROR;
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "%s", get_gss_error(r->pool, major_status, minor_status,
+ "gss_import_name() failed"));
+ return HTTP_INTERNAL_SERVER_ERROR;
}
-
-#ifdef KRB5
- if (conf->krb_5_keytab)
- setenv("KRB5_KTNAME", conf->krb_5_keytab, 1);
-#endif
+ 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->pool, 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,
server_creds, NULL, NULL);
gss_release_name(&minor_status2, &server_name);
-#ifdef KRB5
- if (conf->krb_5_keytab)
- unsetenv("KRB5_KTNAME");
-#endif
if (GSS_ERROR(major_status)) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
- "%s", get_gss_error(r->pool, minor_status,
- "gss_acquire_cred() failed"));
- return SERVER_ERROR;
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "%s", get_gss_error(r->pool, 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;
+
+ if (gss_creds && 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)
+cmp_gss_type(gss_buffer_t token, gss_OID oid)
+{
+ unsigned char *p;
+ size_t len;
+
+ if (token->length == 0)
+ return GSS_S_DEFECTIVE_TOKEN;
+
+ p = token->value;
+ if (*p++ != 0x60)
+ return GSS_S_DEFECTIVE_TOKEN;
+ len = *p++;
+ if (len & 0x80) {
+ if ((len & 0x7f) > 4)
+ return GSS_S_DEFECTIVE_TOKEN;
+ p += len & 0x7f;
+ }
+ if (*p++ != 0x06)
+ return GSS_S_DEFECTIVE_TOKEN;
+
+ if (((OM_uint32) *p++) != oid->length)
+ return GSS_S_DEFECTIVE_TOKEN;
+
+ return memcmp(p, oid->elements, oid->length);
+}
+
+static int
+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;
-
- if (gss_connection == NULL) {
- gss_connection = ap_pcalloc(r->connection->pool, sizeof(*gss_connection));
- if (gss_connection == NULL) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "ap_pcalloc() failed (not enough memory)");
- ret = SERVER_ERROR;
+ OM_uint32
+ (*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;
+
+ *negotiate_ret_value = "\0";
+
+ spnego_oid.length = 6;
+ spnego_oid.elements = (void *)"\x2b\x06\x01\x05\x05\x02";
+
+ if (conf->krb_5_keytab) {
+ char *ktname;
+ /* we don't use the ap_* calls here, since the string passed to putenv()
+ * will become part of the enviroment and shouldn't be free()ed by apache
+ */
+ ktname = malloc(strlen("KRB5_KTNAME=") + strlen(conf->krb_5_keytab) + 1);
+ if (ktname == NULL) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "malloc() 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);
+ 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);
if (auth_param == NULL) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "No Authorization parameter in request from client");
+ 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);
+ 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) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "ap_pcalloc() failed (not enough memory)");
- ret = SERVER_ERROR;
+ 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);
+ accept_sec_token = (cmp_gss_type(&input_token, &spnego_oid) == 0) ?
+ gss_accept_sec_context_spnego : gss_accept_sec_context;
+
+ /* pridat: Read client Negotiate data of length XXX, prefix YYY */
+ 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,
+ &context,
+ server_creds,
+ &input_token,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ &client_name,
+ NULL,
+ &output_token,
+ NULL,
+ NULL,
+ &delegated_cred);
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "Verification returned code %d", major_status);
if (output_token.length) {
char *token = NULL;
size_t len;
- len = ap_base64encode_len(output_token.length);
+ len = ap_base64encode_len(output_token.length) + 1;
token = ap_pcalloc(r->connection->pool, len + 1);
if (token == NULL) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "ap_pcalloc() failed (not enough memory)");
- ret = SERVER_ERROR;
+ 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));
+ *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);
}
if (GSS_ERROR(major_status)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "%s", get_gss_error(r->pool, minor_status,
- "gss_accept_sec_context() failed"));
+ 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,
+ "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_export_name(&minor_status, client_name, &output_token);
+ major_status = gss_display_name(&minor_status, client_name, &output_token, NULL);
gss_release_name(&minor_status, &client_name);
if (GSS_ERROR(major_status)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "%s", get_gss_error(r->pool, minor_status,
- "gss_export_name() failed"));
- ret = SERVER_ERROR;
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "%s", get_gss_error(r->pool, major_status, minor_status,
+ "gss_export_name() failed"));
+ ret = HTTP_INTERNAL_SERVER_ERROR;
goto end;
}
- r->connection->ap_auth_type = "Negotiate";
- r->connection->user = ap_pstrdup(r->pool, output_token.value);
+ MK_AUTH_TYPE = MECH_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);
-
+ if (*negotiate_ret_value)
+ set_kerb_auth_headers(r, conf, 0, 0, *negotiate_ret_value);
-#if 0
- /* If the user comes from a realm specified by configuration don't include
- its realm name in the username so that the authorization routine could
- work for both Password-based and Ticket-based authentication. It's
- administrators responsibility to include only such realm that have
- unified principal instances, i.e. if the same principal name occures in
- multiple realms, it must be always assigned to a single user.
- */
- p = strchr(r->connection->user, '@');
- if (p != NULL) {
- const char *realms = conf->gss_krb5_realms;
-
- while (realms && *realms) {
- if (strcmp(p+1, ap_getword_white(r->pool, &realms)) == 0) {
- *p = '\0';
- break;
- }
- }
- }
-#endif
+ gss_release_buffer(&minor_status, &output_token);
ret = OK;
if (client_name != GSS_C_NO_NAME)
gss_release_name(&minor_status, &client_name);
+ 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)
+{
+ if (ap_is_initial_req(r) || MK_AUTH_TYPE == NULL)
+ return 0;
+ if (strcmp(MK_AUTH_TYPE, MECH_NEGOTIATE) ||
+ (strcmp(MK_AUTH_TYPE, "Basic") && strchr(MK_USER, '@')))
+ return 1;
+ return 0;
+}
static void
-note_auth_failure(request_rec *r, const kerb_auth_config *conf)
+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 (conf->krb_method_gssapi)
- ap_table_add(r->err_headers_out, "WWW-Authenticate", "GSS-Negotiate ");
- if (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 :
+ ap_pstrcat(r->pool, MECH_NEGOTIATE " ", negotiate_ret_value, NULL);
+ ap_table_add(r->err_headers_out, header_name, negoauth_param);
+ }
+ if ((use_krb5pwd && conf->krb_method_k5pass) || conf->krb_delegate_basic) {
+ ap_table_add(r->err_headers_out, header_name,
+ ap_pstrcat(r->pool, "Basic realm=\"", auth_name, "\"", NULL));
+ set_basic = 1;
+ }
#endif
#ifdef KRB4
- if (conf->krb_method_k4pass)
- 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))
+ ap_table_add(r->err_headers_out, header_name,
+ ap_pstrcat(r->pool, "Basic realm=\"", auth_name, "\"", NULL));
#endif
}
{
kerb_auth_config *conf =
(kerb_auth_config *) ap_get_module_config(r->per_dir_config,
- &kerb_auth_module);
+ &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;
+ static int last_return = HTTP_UNAUTHORIZED;
+ char *negotiate_ret_value = NULL;
/* get the type specified in .htaccess */
type = ap_auth_type(r);
-#ifdef KRB5
- if (type != NULL && strcasecmp(type, "KerberosV5") == 0) {
- ap_log_rerror(APLOG_MARK, APLOG_WARNING, r,
- "The use of KerberosV5 in AuthType is obsolete, please consider using the AuthKerberos option");
- conf->krb_auth_enable = 1;
- }
-#endif
-
-#ifdef KRB4
- if (type != NULL && strcasecmp(type, "KerberosV4") == 0) {
- ap_log_rerror(APLOG_MARK, APLOG_WARNING, r,
- "The use of KerberosV4 in AuthType is obsolete, please consider using the AuthKerberos option");
- conf->krb_auth_enable = 1;
- }
-#endif
-
- if (!conf->krb_auth_enable)
+ 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_krb5 = 1;
+ else if(type && strcasecmp(type, "KerberosV4") == 0)
+ use_krb4 = 1;
+ else
return DECLINED;
/* 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_auth_failure(r, conf);
+ 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 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;
+
+ if (already_succeeded(r))
+ return last_return;
+
ret = HTTP_UNAUTHORIZED;
#ifdef KRB5
- if (conf->krb_method_gssapi &&
- strcasecmp(auth_type, "GSS-Negotiate") == 0) {
- ret = authenticate_user_gss(r, conf, auth_line);
- } else if (conf->krb_method_k5pass &&
+ if (use_krb5 && conf->krb_method_gssapi &&
+ 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
#ifdef KRB4
- if (ret == HTTP_UNAUTHORIZED && conf->krb_method_k4pass &&
+ 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_auth_failure(r, conf);
-
- return ret;
-}
+ set_kerb_auth_headers(r, conf, use_krb4, use_krb5, negotiate_ret_value);
+ /* XXX log_debug: if ret==OK, log(user XY authenticated) */
-#if 0
-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;
+ last_return = ret;
+ return ret;
}
-#endif
-
-
/***************************************************************************
Module Setup/Configuration
***************************************************************************/
-#ifdef APXS1
-module MODULE_VAR_EXPORT kerb_auth_module = {
+#ifndef STANDARD20_MODULE_STUFF
+module MODULE_VAR_EXPORT auth_kerb_module = {
STANDARD_MODULE_STUFF,
NULL, /* module initializer */
kerb_dir_create_config, /* per-directory 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
+kerb_init_handler(apr_pool_t *p, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec *s)
+{
+ ap_add_version_component(p, "mod_auth_kerb/" MODAUTHKERB_VERSION);
+ return OK;
+}
+
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);
}
-module AP_MODULE_DECLARE_DATA kerb_auth_module =
+module AP_MODULE_DECLARE_DATA auth_kerb_module =
{
STANDARD20_MODULE_STUFF,
kerb_dir_create_config, /* create per-dir conf structures */
projects / mod_auth_kerb.cvs / .git / blobdiff