4 Copyright (C) 2014 Simo Sorce <simo@redhat.com>
6 Permission is hereby granted, free of charge, to any person obtaining a
7 copy of this software and associated documentation files (the "Software"),
8 to deal in the Software without restriction, including without limitation
9 the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 and/or sell copies of the Software, and to permit persons to whom the
11 Software is furnished to do so, subject to the following conditions:
13 The above copyright notice and this permission notice shall be included in
14 all copies or substantial portions of the Software.
16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 DEALINGS IN THE SOFTWARE.
25 #include "mod_auth_gssapi.h"
27 const gss_OID_desc gss_mech_ntlmssp = {
28 GSS_NTLMSSP_OID_LENGTH, GSS_NTLMSSP_OID_STRING
31 const gss_OID_set_desc gss_mech_set_ntlmssp = {
32 1, discard_const(&gss_mech_ntlmssp)
35 #define MOD_AUTH_GSSAPI_VERSION PACKAGE_NAME "/" PACKAGE_VERSION
37 module AP_MODULE_DECLARE_DATA auth_gssapi_module;
39 APLOG_USE_MODULE(auth_gssapi);
41 static char *mag_status(request_rec *req, int type, uint32_t err)
43 uint32_t maj_ret, min_ret;
52 maj_ret = gss_display_status(&min_ret, err, type,
53 GSS_C_NO_OID, &msg_ctx, &text);
54 if (maj_ret != GSS_S_COMPLETE) {
60 msg_ret = apr_psprintf(req->pool, "%s, %*s",
61 msg_ret, len, (char *)text.value);
63 msg_ret = apr_psprintf(req->pool, "%*s", len, (char *)text.value);
65 gss_release_buffer(&min_ret, &text);
66 } while (msg_ctx != 0);
71 static char *mag_error(request_rec *req, const char *msg,
72 uint32_t maj, uint32_t min)
77 msg_maj = mag_status(req, GSS_C_GSS_CODE, maj);
78 msg_min = mag_status(req, GSS_C_MECH_CODE, min);
79 return apr_psprintf(req->pool, "%s: [%s (%s)]", msg, msg_maj, msg_min);
82 static APR_OPTIONAL_FN_TYPE(ssl_is_https) *mag_is_https = NULL;
84 static int mag_post_config(apr_pool_t *cfgpool, apr_pool_t *log,
85 apr_pool_t *temp, server_rec *s)
87 /* FIXME: create mutex to deal with connections and contexts ? */
88 mag_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https);
89 mag_post_config_session();
90 ap_add_version_component(cfgpool, MOD_AUTH_GSSAPI_VERSION);
95 static int mag_pre_connection(conn_rec *c, void *csd)
99 mc = apr_pcalloc(c->pool, sizeof(struct mag_conn));
101 mc->parent = c->pool;
102 ap_set_module_config(c->conn_config, &auth_gssapi_module, (void*)mc);
106 static apr_status_t mag_conn_destroy(void *ptr)
108 struct mag_conn *mc = (struct mag_conn *)ptr;
112 (void)gss_delete_sec_context(&min, &mc->ctx, GSS_C_NO_BUFFER);
113 mc->established = false;
118 static bool mag_conn_is_https(conn_rec *c)
121 if (mag_is_https(c)) return true;
127 static bool mag_acquire_creds(request_rec *req,
128 struct mag_config *cfg,
129 gss_OID_set desired_mechs,
130 gss_cred_usage_t cred_usage,
131 gss_cred_id_t *creds,
132 gss_OID_set *actual_mechs)
135 #ifdef HAVE_CRED_STORE
136 gss_const_key_value_set_t store = cfg->cred_store;
138 maj = gss_acquire_cred_from(&min, GSS_C_NO_NAME, GSS_C_INDEFINITE,
139 desired_mechs, cred_usage, store, creds,
142 maj = gss_acquire_cred(&min, GSS_C_NO_NAME, GSS_C_INDEFINITE,
143 desired_mechs, cred_usage, creds,
147 if (GSS_ERROR(maj)) {
148 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
149 mag_error(req, "gss_acquire_cred[_from]() "
150 "failed to get server creds",
158 #ifdef HAVE_CRED_STORE
159 static char *escape(apr_pool_t *pool, const char *name,
160 char find, const char *replace)
162 char *escaped = NULL;
167 namecopy = apr_pstrdup(pool, name);
169 p = strchr(namecopy, find);
170 if (!p) return namecopy;
175 /* terminate previous segment */
178 escaped = apr_pstrcat(pool, escaped, n, replace, NULL);
180 escaped = apr_pstrcat(pool, n, replace, NULL);
182 /* move to next segment */
186 /* append last segment if any */
188 escaped = apr_pstrcat(pool, escaped, n, NULL);
194 static char *mag_gss_name_to_ccache_name(request_rec *req,
195 char *dir, const char *gss_name)
199 /* We need to escape away '/', we can't have path separators in
200 * a ccache file name */
201 /* first double escape the esacping char (~) if any */
202 escaped = escape(req->pool, gss_name, '~', "~~");
203 /* then escape away the separator (/) if any */
204 escaped = escape(req->pool, escaped, '/', "~");
206 return apr_psprintf(req->pool, "%s/%s", dir, escaped);
209 static void mag_set_KRB5CCANME(request_rec *req, char *ccname)
215 status = apr_stat(&finfo, ccname, APR_FINFO_MIN, req->pool);
216 if (status != APR_SUCCESS && status != APR_INCOMPLETE) {
217 /* set the file cache anyway, but warn */
218 ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
219 "KRB5CCNAME file (%s) lookup failed!", ccname);
222 value = apr_psprintf(req->pool, "FILE:%s", ccname);
223 apr_table_set(req->subprocess_env, "KRB5CCNAME", value);
226 static void mag_store_deleg_creds(request_rec *req,
227 char *dir, char *clientname,
228 gss_cred_id_t delegated_cred,
231 gss_key_value_element_desc element;
232 gss_key_value_set_desc store;
235 element.key = "ccache";
236 store.elements = &element;
239 ccname = mag_gss_name_to_ccache_name(req, dir, clientname);
240 element.value = apr_psprintf(req->pool, "FILE:%s", ccname);
242 maj = gss_store_cred_into(&min, delegated_cred, GSS_C_INITIATE,
243 GSS_C_NULL_OID, 1, 1, &store, NULL, NULL);
244 if (GSS_ERROR(maj)) {
245 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
246 mag_error(req, "failed to store delegated creds",
250 *ccachefile = ccname;
254 static bool parse_auth_header(apr_pool_t *pool, const char **auth_header,
257 char *auth_header_value;
259 auth_header_value = ap_getword_white(pool, auth_header);
260 if (!auth_header_value) return false;
261 value->length = apr_base64_decode_len(auth_header_value) + 1;
262 value->value = apr_pcalloc(pool, value->length);
263 if (!value->value) return false;
264 value->length = apr_base64_decode(value->value, auth_header_value);
269 static bool is_mech_allowed(struct mag_config *cfg, gss_const_OID mech)
271 if (cfg->allowed_mechs == GSS_C_NO_OID_SET) return true;
273 for (int i = 0; i < cfg->allowed_mechs->count; i++) {
274 if (gss_oid_equal(&cfg->allowed_mechs->elements[i], mech)) {
281 #define AUTH_TYPE_NEGOTIATE 0
282 #define AUTH_TYPE_BASIC 1
283 #define AUTH_TYPE_RAW_NTLM 2
284 const char *auth_types[] = {
291 static void mag_set_req_data(request_rec *req,
292 struct mag_config *cfg,
295 apr_table_set(req->subprocess_env, "GSS_NAME", mc->gss_name);
296 apr_table_set(req->subprocess_env, "GSS_SESSION_EXPIRATION",
297 apr_psprintf(req->pool,
298 "%ld", (long)mc->expiration));
299 req->ap_auth_type = apr_pstrdup(req->pool,
300 auth_types[mc->auth_type]);
301 req->user = apr_pstrdup(req->pool, mc->user_name);
302 if (cfg->deleg_ccache_dir && mc->delegated) {
304 ccname = mag_gss_name_to_ccache_name(req,
305 cfg->deleg_ccache_dir,
308 mag_set_KRB5CCANME(req, ccname);
313 static int mag_auth(request_rec *req)
317 struct mag_config *cfg;
318 const char *auth_header;
319 char *auth_header_type;
320 int ret = HTTP_UNAUTHORIZED;
321 gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
323 gss_buffer_desc input = GSS_C_EMPTY_BUFFER;
324 gss_buffer_desc output = GSS_C_EMPTY_BUFFER;
325 gss_buffer_desc name = GSS_C_EMPTY_BUFFER;
326 gss_buffer_desc ba_user;
327 gss_buffer_desc ba_pwd;
328 gss_name_t client = GSS_C_NO_NAME;
329 gss_cred_id_t user_cred = GSS_C_NO_CREDENTIAL;
330 gss_cred_id_t acquired_cred = GSS_C_NO_CREDENTIAL;
331 gss_cred_id_t server_cred = GSS_C_NO_CREDENTIAL;
332 gss_cred_id_t delegated_cred = GSS_C_NO_CREDENTIAL;
333 gss_cred_usage_t cred_usage = GSS_C_ACCEPT;
340 gss_OID mech_type = GSS_C_NO_OID;
341 gss_OID_set desired_mechs = GSS_C_NO_OID_SET;
342 gss_buffer_desc lname = GSS_C_EMPTY_BUFFER;
343 struct mag_conn *mc = NULL;
344 gss_ctx_id_t user_ctx = GSS_C_NO_CONTEXT;
345 gss_name_t server = GSS_C_NO_NAME;
346 #ifdef HAVE_GSS_KRB5_CCACHE_NAME
347 const char *user_ccache = NULL;
348 const char *orig_ccache = NULL;
350 uint32_t init_flags = 0;
354 type = ap_auth_type(req);
355 if ((type == NULL) || (strcasecmp(type, "GSSAPI") != 0)) {
359 cfg = ap_get_module_config(req->per_dir_config, &auth_gssapi_module);
361 if (!cfg->allowed_mechs) {
362 /* Try to fetch the default set if not explicitly configured */
363 (void)mag_acquire_creds(req, cfg, GSS_C_NO_OID_SET, GSS_C_ACCEPT,
364 &server_cred, &cfg->allowed_mechs);
365 (void)gss_release_cred(&min, &server_cred);
368 /* implicit auth for subrequests if main auth already happened */
369 if (!ap_is_initial_req(req) && req->main != NULL) {
370 type = ap_auth_type(req->main);
371 if ((type != NULL) && (strcasecmp(type, "GSSAPI") == 0)) {
372 /* warn if the subrequest location and the main request
373 * location have different configs */
374 if (cfg != ap_get_module_config(req->main->per_dir_config,
375 &auth_gssapi_module)) {
376 ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0,
377 req, "Subrequest authentication bypass on "
378 "location with different configuration!");
380 if (req->main->user) {
381 req->user = apr_pstrdup(req->pool, req->main->user);
384 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
385 "The main request is tasked to establish the "
386 "security context, can't proceed!");
387 return HTTP_UNAUTHORIZED;
390 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, req,
391 "Subrequest GSSAPI auth with no auth on the main "
392 "request. This operation may fail if other "
393 "subrequests already established a context or the "
394 "mechanism requires multiple roundtrips.");
399 if (!mag_conn_is_https(req->connection)) {
400 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
401 "Not a TLS connection, refusing to authenticate!");
406 if (cfg->gss_conn_ctx) {
407 mc = (struct mag_conn *)ap_get_module_config(
408 req->connection->conn_config,
409 &auth_gssapi_module);
411 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, req,
412 "Failed to retrieve connection context!");
417 /* if available, session always supersedes connection bound data */
418 if (cfg->use_sessions) {
419 mag_check_session(req, cfg, &mc);
422 auth_header = apr_table_get(req->headers_in, "Authorization");
425 /* register the context in the memory pool, so it can be freed
426 * when the connection/request is terminated */
427 apr_pool_cleanup_register(mc->parent, (void *) mc,
428 mag_conn_destroy, apr_pool_cleanup_null);
430 if (mc->established && !auth_header) {
431 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, req,
432 "Already established context found!");
433 mag_set_req_data(req, cfg, mc);
440 /* We can proceed only if we do have an auth header */
441 if (!auth_header) goto done;
443 auth_header_type = ap_getword_white(req->pool, &auth_header);
444 if (!auth_header_type) goto done;
446 for (i = 0; auth_types[i] != NULL; i++) {
447 if (strcasecmp(auth_header_type, auth_types[i]) == 0) {
454 case AUTH_TYPE_NEGOTIATE:
455 if (!parse_auth_header(req->pool, &auth_header, &input)) {
459 case AUTH_TYPE_BASIC:
460 if (!cfg->use_basic_auth) {
464 ba_pwd.value = ap_pbase64decode(req->pool, auth_header);
465 if (!ba_pwd.value) goto done;
466 ba_user.value = ap_getword_nulls_nc(req->pool,
467 (char **)&ba_pwd.value, ':');
468 if (!ba_user.value) goto done;
469 if (((char *)ba_user.value)[0] == '\0' ||
470 ((char *)ba_pwd.value)[0] == '\0') {
471 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
472 "Invalid empty user or password for Basic Auth");
475 ba_user.length = strlen(ba_user.value);
476 ba_pwd.length = strlen(ba_pwd.value);
478 if (mc && mc->established &&
479 mag_basic_check(cfg, mc, ba_user, ba_pwd)) {
480 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, req,
481 "Already established BASIC AUTH context found!");
482 mag_set_req_data(req, cfg, mc);
487 maj = gss_import_name(&min, &ba_user, GSS_C_NT_USER_NAME, &client);
488 if (GSS_ERROR(maj)) {
489 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
491 mag_error(req, "gss_import_name() failed",
495 #ifdef HAVE_GSS_KRB5_CCACHE_NAME
496 /* Set a per-thread ccache in case we are using kerberos,
497 * it is not elegant but avoids interference between threads */
498 long long unsigned int rndname;
500 rs = apr_generate_random_bytes((unsigned char *)(&rndname),
501 sizeof(long long unsigned int));
502 if (rs != APR_SUCCESS) {
503 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
504 "Failed to generate random ccache name");
507 user_ccache = apr_psprintf(req->pool, "MEMORY:user_%qu", rndname);
508 maj = gss_krb5_ccache_name(&min, user_ccache, &orig_ccache);
509 if (GSS_ERROR(maj)) {
510 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
512 mag_error(req, "gss_krb5_ccache_name() "
513 "failed", maj, min));
517 maj = gss_acquire_cred_with_password(&min, client, &ba_pwd,
521 &user_cred, NULL, NULL);
522 if (GSS_ERROR(maj)) {
523 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
525 mag_error(req, "gss_acquire_cred_with_password() "
526 "failed", maj, min));
529 gss_release_name(&min, &client);
532 case AUTH_TYPE_RAW_NTLM:
533 if (!is_mech_allowed(cfg, &gss_mech_ntlmssp)) {
534 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, req,
535 "NTLM Authentication is not allowed!");
539 if (!parse_auth_header(req->pool, &auth_header, &input)) {
543 desired_mechs = discard_const(&gss_mech_set_ntlmssp);
550 req->ap_auth_type = apr_pstrdup(req->pool, auth_types[auth_type]);
552 #ifdef HAVE_CRED_STORE
553 if (cfg->use_s4u2proxy) {
554 cred_usage = GSS_C_BOTH;
557 if (!mag_acquire_creds(req, cfg, desired_mechs,
558 cred_usage, &acquired_cred, NULL)) {
562 if (auth_type == AUTH_TYPE_BASIC) {
563 if (cred_usage == GSS_C_BOTH) {
564 /* If GSS_C_BOTH is used then inquire_cred will return the client
565 * name instead of the SPN of the server credentials. Therefore we
566 * need to acquire a different set of credential setting
567 * GSS_C_ACCEPT explicitly */
568 if (!mag_acquire_creds(req, cfg, cfg->allowed_mechs,
569 GSS_C_ACCEPT, &server_cred, NULL)) {
573 server_cred = acquired_cred;
575 maj = gss_inquire_cred(&min, server_cred, &server,
577 if (GSS_ERROR(maj)) {
578 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
579 "%s", mag_error(req, "gss_inquired_cred_() "
580 "failed", maj, min));
583 if (server_cred != acquired_cred) {
584 gss_release_cred(&min, &server_cred);
587 #ifdef HAVE_CRED_STORE
588 if (cfg->deleg_ccache_dir) {
589 /* delegate ourselves credentials so we store them as requested */
590 init_flags |= GSS_C_DELEG_FLAG;
594 /* output and input are inverted here, this is intentional */
595 maj = gss_init_sec_context(&min, user_cred, &user_ctx, server,
596 GSS_C_NO_OID, init_flags, 300,
597 GSS_C_NO_CHANNEL_BINDINGS, &output,
598 NULL, &input, NULL, NULL);
599 if (GSS_ERROR(maj)) {
600 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
601 "%s", mag_error(req, "gss_init_sec_context() "
602 "failed", maj, min));
607 if (auth_type == AUTH_TYPE_NEGOTIATE &&
608 cfg->allowed_mechs != GSS_C_NO_OID_SET) {
609 maj = gss_set_neg_mechs(&min, acquired_cred, cfg->allowed_mechs);
610 if (GSS_ERROR(maj)) {
611 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
612 mag_error(req, "gss_set_neg_mechs() failed",
618 maj = gss_accept_sec_context(&min, pctx, acquired_cred,
619 &input, GSS_C_NO_CHANNEL_BINDINGS,
620 &client, &mech_type, &output, &flags, &vtime,
622 if (GSS_ERROR(maj)) {
623 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
624 mag_error(req, "gss_accept_sec_context() failed",
628 if (auth_type == AUTH_TYPE_BASIC) {
629 while (maj == GSS_S_CONTINUE_NEEDED) {
630 gss_release_buffer(&min, &input);
631 /* output and input are inverted here, this is intentional */
632 maj = gss_init_sec_context(&min, user_cred, &user_ctx, server,
633 GSS_C_NO_OID, init_flags, 300,
634 GSS_C_NO_CHANNEL_BINDINGS, &output,
635 NULL, &input, NULL, NULL);
636 if (GSS_ERROR(maj)) {
637 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
638 "%s", mag_error(req, "gss_init_sec_context() "
639 "failed", maj, min));
642 gss_release_buffer(&min, &output);
643 maj = gss_accept_sec_context(&min, pctx, acquired_cred,
644 &input, GSS_C_NO_CHANNEL_BINDINGS,
645 &client, &mech_type, &output, &flags,
646 &vtime, &delegated_cred);
647 if (GSS_ERROR(maj)) {
648 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
649 "%s", mag_error(req, "gss_accept_sec_context()"
650 " failed", maj, min));
654 } else if (maj == GSS_S_CONTINUE_NEEDED) {
656 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
657 "Mechanism needs continuation but neither "
658 "GssapiConnectionBound nor "
659 "GssapiUseSessions are available");
660 gss_release_buffer(&min, &output);
663 /* auth not complete send token and wait next packet */
667 /* Always set the GSS name in an env var */
668 maj = gss_display_name(&min, client, &name, NULL);
669 if (GSS_ERROR(maj)) {
670 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
671 mag_error(req, "gss_display_name() failed",
675 clientname = apr_pstrndup(req->pool, name.value, name.length);
676 apr_table_set(req->subprocess_env, "GSS_NAME", clientname);
677 expiration = time(NULL) + vtime;
678 apr_table_set(req->subprocess_env, "GSS_SESSION_EXPIRATION",
679 apr_psprintf(req->pool, "%ld", (long)expiration));
681 #ifdef HAVE_CRED_STORE
682 if (cfg->deleg_ccache_dir && delegated_cred != GSS_C_NO_CREDENTIAL) {
683 char *ccachefile = NULL;
685 mag_store_deleg_creds(req, cfg->deleg_ccache_dir, clientname,
686 delegated_cred, &ccachefile);
689 mag_set_KRB5CCANME(req, ccachefile);
693 mc->delegated = true;
698 if (cfg->map_to_local) {
699 maj = gss_localname(&min, client, mech_type, &lname);
700 if (maj != GSS_S_COMPLETE) {
701 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
702 mag_error(req, "gss_localname() failed", maj, min));
705 req->user = apr_pstrndup(req->pool, lname.value, lname.length);
707 req->user = clientname;
711 mc->user_name = apr_pstrdup(mc->parent, req->user);
712 mc->gss_name = apr_pstrdup(mc->parent, clientname);
713 mc->established = true;
714 if (vtime == GSS_C_INDEFINITE || vtime < MIN_SESS_EXP_TIME) {
715 vtime = MIN_SESS_EXP_TIME;
717 mc->expiration = expiration;
718 mc->auth_type = auth_type;
719 if (auth_type == AUTH_TYPE_BASIC) {
720 mag_basic_cache(cfg, mc, ba_user, ba_pwd);
722 if (cfg->use_sessions) {
723 mag_attempt_session(req, cfg, mc);
727 if (cfg->send_persist)
728 apr_table_set(req->headers_out, "Persistent-Auth",
729 cfg->gss_conn_ctx ? "true" : "false");
734 if ((auth_type != AUTH_TYPE_BASIC) && (output.length != 0)) {
735 int prefixlen = strlen(auth_types[auth_type]) + 1;
736 replen = apr_base64_encode_len(output.length) + 1;
737 reply = apr_pcalloc(req->pool, prefixlen + replen);
739 memcpy(reply, auth_types[auth_type], prefixlen - 1);
740 reply[prefixlen - 1] = ' ';
741 apr_base64_encode(&reply[prefixlen], output.value, output.length);
742 apr_table_add(req->err_headers_out,
743 "WWW-Authenticate", reply);
745 } else if (ret == HTTP_UNAUTHORIZED) {
746 apr_table_add(req->err_headers_out, "WWW-Authenticate", "Negotiate");
747 if (is_mech_allowed(cfg, &gss_mech_ntlmssp)) {
748 apr_table_add(req->err_headers_out, "WWW-Authenticate", "NTLM");
750 if (cfg->use_basic_auth) {
751 apr_table_add(req->err_headers_out,
753 apr_psprintf(req->pool, "Basic realm=\"%s\"",
757 #ifdef HAVE_GSS_KRB5_CCACHE_NAME
758 if (user_ccache != NULL) {
759 maj = gss_krb5_ccache_name(&min, orig_ccache, NULL);
760 if (maj != GSS_S_COMPLETE) {
761 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
762 "Failed to restore per-thread ccache, %s",
763 mag_error(req, "gss_krb5_ccache_name() "
764 "failed", maj, min));
768 if (ctx != GSS_C_NO_CONTEXT)
769 gss_delete_sec_context(&min, &ctx, GSS_C_NO_BUFFER);
770 gss_delete_sec_context(&min, &user_ctx, GSS_C_NO_BUFFER);
771 gss_release_cred(&min, &user_cred);
772 gss_release_cred(&min, &acquired_cred);
773 gss_release_cred(&min, &delegated_cred);
774 gss_release_buffer(&min, &output);
775 gss_release_name(&min, &client);
776 gss_release_name(&min, &server);
777 gss_release_buffer(&min, &name);
778 gss_release_buffer(&min, &lname);
783 static void *mag_create_dir_config(apr_pool_t *p, char *dir)
785 struct mag_config *cfg;
787 cfg = (struct mag_config *)apr_pcalloc(p, sizeof(struct mag_config));
793 static const char *mag_ssl_only(cmd_parms *parms, void *mconfig, int on)
795 struct mag_config *cfg = (struct mag_config *)mconfig;
796 cfg->ssl_only = on ? true : false;
800 static const char *mag_map_to_local(cmd_parms *parms, void *mconfig, int on)
802 struct mag_config *cfg = (struct mag_config *)mconfig;
803 cfg->map_to_local = on ? true : false;
807 static const char *mag_conn_ctx(cmd_parms *parms, void *mconfig, int on)
809 struct mag_config *cfg = (struct mag_config *)mconfig;
810 cfg->gss_conn_ctx = on ? true : false;
814 static const char *mag_send_persist(cmd_parms *parms, void *mconfig, int on)
816 struct mag_config *cfg = (struct mag_config *)mconfig;
817 cfg->send_persist = on ? true : false;
821 static const char *mag_use_sess(cmd_parms *parms, void *mconfig, int on)
823 struct mag_config *cfg = (struct mag_config *)mconfig;
824 cfg->use_sessions = on ? true : false;
828 #ifdef HAVE_CRED_STORE
829 static const char *mag_use_s4u2p(cmd_parms *parms, void *mconfig, int on)
831 struct mag_config *cfg = (struct mag_config *)mconfig;
832 cfg->use_s4u2proxy = on ? true : false;
834 if (cfg->deleg_ccache_dir == NULL) {
835 cfg->deleg_ccache_dir = apr_pstrdup(parms->pool, "/tmp");
841 static const char *mag_sess_key(cmd_parms *parms, void *mconfig, const char *w)
843 struct mag_config *cfg = (struct mag_config *)mconfig;
850 if (strncmp(w, "key:", 4) != 0) {
851 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
852 "Invalid key format, expected prefix 'key:'");
857 l = apr_base64_decode_len(k);
858 val = apr_palloc(parms->temp_pool, l);
860 keys.length = (int)apr_base64_decode_binary(val, k);
861 keys.value = (unsigned char *)val;
863 if (keys.length != 32) {
864 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
865 "Invalid key length, expected 32 got %d", keys.length);
869 rc = SEAL_KEY_CREATE(cfg->pool, &cfg->mag_skey, &keys);
871 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
872 "Failed to import sealing key!");
877 #ifdef HAVE_CRED_STORE
879 #define MAX_CRED_OPTIONS 10
881 static const char *mag_cred_store(cmd_parms *parms, void *mconfig,
884 struct mag_config *cfg = (struct mag_config *)mconfig;
885 gss_key_value_element_desc *elements;
894 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
895 "%s [%s]", "Invalid syntax for GssapiCredStore option", w);
899 key = apr_pstrndup(parms->pool, w, (p-w));
900 value = apr_pstrdup(parms->pool, p + 1);
902 if (!cfg->cred_store) {
903 cfg->cred_store = apr_pcalloc(parms->pool,
904 sizeof(gss_key_value_set_desc));
905 size = sizeof(gss_key_value_element_desc) * MAX_CRED_OPTIONS;
906 cfg->cred_store->elements = apr_palloc(parms->pool, size);
909 elements = cfg->cred_store->elements;
910 count = cfg->cred_store->count;
912 if (count >= MAX_CRED_OPTIONS) {
913 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
914 "Too many GssapiCredStore options (MAX: %d)",
918 cfg->cred_store->count++;
920 elements[count].key = key;
921 elements[count].value = value;
926 static const char *mag_deleg_ccache_dir(cmd_parms *parms, void *mconfig,
929 struct mag_config *cfg = (struct mag_config *)mconfig;
931 cfg->deleg_ccache_dir = apr_pstrdup(parms->pool, value);
937 static const char *mag_use_basic_auth(cmd_parms *parms, void *mconfig, int on)
939 struct mag_config *cfg = (struct mag_config *)mconfig;
941 cfg->use_basic_auth = on ? true : false;
945 #define MAX_ALLOWED_MECHS 10
947 static const char *mag_allow_mech(cmd_parms *parms, void *mconfig,
950 struct mag_config *cfg = (struct mag_config *)mconfig;
954 if (!cfg->allowed_mechs) {
955 cfg->allowed_mechs = apr_pcalloc(parms->pool,
956 sizeof(gss_OID_set_desc));
957 size = sizeof(gss_OID) * MAX_ALLOWED_MECHS;
958 cfg->allowed_mechs->elements = apr_palloc(parms->pool, size);
961 if (strcmp(w, "krb5") == 0) {
963 } else if (strcmp(w, "iakerb") == 0) {
964 oid = gss_mech_iakerb;
965 } else if (strcmp(w, "ntlmssp") == 0) {
966 oid = &gss_mech_ntlmssp;
968 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
969 "Unrecognized GSSAPI Mechanism: %s", w);
973 if (cfg->allowed_mechs->count >= MAX_ALLOWED_MECHS) {
974 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
975 "Too many GssapiAllowedMech options (MAX: %d)",
979 cfg->allowed_mechs->elements[cfg->allowed_mechs->count] = *oid;
980 cfg->allowed_mechs->count++;
985 static const command_rec mag_commands[] = {
986 AP_INIT_FLAG("GssapiSSLonly", mag_ssl_only, NULL, OR_AUTHCFG,
987 "Work only if connection is SSL Secured"),
988 AP_INIT_FLAG("GssapiLocalName", mag_map_to_local, NULL, OR_AUTHCFG,
989 "Translate principals to local names"),
990 AP_INIT_FLAG("GssapiConnectionBound", mag_conn_ctx, NULL, OR_AUTHCFG,
991 "Authentication is bound to the TCP connection"),
992 AP_INIT_FLAG("GssapiSignalPersistentAuth", mag_send_persist, NULL, OR_AUTHCFG,
993 "Send Persitent-Auth header according to connection bound"),
994 AP_INIT_FLAG("GssapiUseSessions", mag_use_sess, NULL, OR_AUTHCFG,
995 "Authentication uses mod_sessions to hold status"),
996 AP_INIT_RAW_ARGS("GssapiSessionKey", mag_sess_key, NULL, OR_AUTHCFG,
997 "Key Used to seal session data."),
998 #ifdef HAVE_CRED_STORE
999 AP_INIT_FLAG("GssapiUseS4U2Proxy", mag_use_s4u2p, NULL, OR_AUTHCFG,
1000 "Initializes credentials for s4u2proxy usage"),
1001 AP_INIT_ITERATE("GssapiCredStore", mag_cred_store, NULL, OR_AUTHCFG,
1002 "Credential Store"),
1003 AP_INIT_RAW_ARGS("GssapiDelegCcacheDir", mag_deleg_ccache_dir, NULL,
1004 OR_AUTHCFG, "Directory to store delegated credentials"),
1006 #ifdef HAVE_GSS_ACQUIRE_CRED_WITH_PASSWORD
1007 AP_INIT_FLAG("GssapiBasicAuth", mag_use_basic_auth, NULL, OR_AUTHCFG,
1008 "Allows use of Basic Auth for authentication"),
1010 AP_INIT_ITERATE("GssapiAllowedMech", mag_allow_mech, NULL, OR_AUTHCFG,
1011 "Allowed Mechanisms"),
1016 mag_register_hooks(apr_pool_t *p)
1018 ap_hook_check_user_id(mag_auth, NULL, NULL, APR_HOOK_MIDDLE);
1019 ap_hook_post_config(mag_post_config, NULL, NULL, APR_HOOK_MIDDLE);
1020 ap_hook_pre_connection(mag_pre_connection, NULL, NULL, APR_HOOK_MIDDLE);
1023 module AP_MODULE_DECLARE_DATA auth_gssapi_module =
1025 STANDARD20_MODULE_STUFF,
1026 mag_create_dir_config,