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);
442 /* We can proceed only if we do have an auth header */
443 if (!auth_header) goto done;
445 auth_header_type = ap_getword_white(req->pool, &auth_header);
446 if (!auth_header_type) goto done;
448 for (i = 0; auth_types[i] != NULL; i++) {
449 if (strcasecmp(auth_header_type, auth_types[i]) == 0) {
456 case AUTH_TYPE_NEGOTIATE:
457 if (!parse_auth_header(req->pool, &auth_header, &input)) {
461 case AUTH_TYPE_BASIC:
462 if (!cfg->use_basic_auth) {
466 ba_pwd.value = ap_pbase64decode(req->pool, auth_header);
467 if (!ba_pwd.value) goto done;
468 ba_user.value = ap_getword_nulls_nc(req->pool,
469 (char **)&ba_pwd.value, ':');
470 if (!ba_user.value) goto done;
471 if (((char *)ba_user.value)[0] == '\0' ||
472 ((char *)ba_pwd.value)[0] == '\0') {
473 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
474 "Invalid empty user or password for Basic Auth");
477 ba_user.length = strlen(ba_user.value);
478 ba_pwd.length = strlen(ba_pwd.value);
480 if (mc && mc->established &&
481 mag_basic_check(cfg, mc, ba_user, ba_pwd)) {
482 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, req,
483 "Already established BASIC AUTH context found!");
484 mag_set_req_data(req, cfg, mc);
489 maj = gss_import_name(&min, &ba_user, GSS_C_NT_USER_NAME, &client);
490 if (GSS_ERROR(maj)) {
491 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
493 mag_error(req, "gss_import_name() failed",
497 #ifdef HAVE_GSS_KRB5_CCACHE_NAME
498 /* Set a per-thread ccache in case we are using kerberos,
499 * it is not elegant but avoids interference between threads */
500 long long unsigned int rndname;
502 rs = apr_generate_random_bytes((unsigned char *)(&rndname),
503 sizeof(long long unsigned int));
504 if (rs != APR_SUCCESS) {
505 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
506 "Failed to generate random ccache name");
509 user_ccache = apr_psprintf(req->pool, "MEMORY:user_%qu", rndname);
510 maj = gss_krb5_ccache_name(&min, user_ccache, &orig_ccache);
511 if (GSS_ERROR(maj)) {
512 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
514 mag_error(req, "gss_krb5_ccache_name() "
515 "failed", maj, min));
519 maj = gss_acquire_cred_with_password(&min, client, &ba_pwd,
523 &user_cred, NULL, NULL);
524 if (GSS_ERROR(maj)) {
525 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
527 mag_error(req, "gss_acquire_cred_with_password() "
528 "failed", maj, min));
531 gss_release_name(&min, &client);
534 case AUTH_TYPE_RAW_NTLM:
535 if (!is_mech_allowed(cfg, &gss_mech_ntlmssp)) {
536 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, req,
537 "NTLM Authentication is not allowed!");
541 if (!parse_auth_header(req->pool, &auth_header, &input)) {
545 desired_mechs = discard_const(&gss_mech_set_ntlmssp);
552 req->ap_auth_type = apr_pstrdup(req->pool, auth_types[auth_type]);
554 #ifdef HAVE_CRED_STORE
555 if (cfg->use_s4u2proxy) {
556 cred_usage = GSS_C_BOTH;
559 if (!mag_acquire_creds(req, cfg, desired_mechs,
560 cred_usage, &acquired_cred, NULL)) {
564 if (auth_type == AUTH_TYPE_BASIC) {
565 if (cred_usage == GSS_C_BOTH) {
566 /* If GSS_C_BOTH is used then inquire_cred will return the client
567 * name instead of the SPN of the server credentials. Therefore we
568 * need to acquire a different set of credential setting
569 * GSS_C_ACCEPT explicitly */
570 if (!mag_acquire_creds(req, cfg, cfg->allowed_mechs,
571 GSS_C_ACCEPT, &server_cred, NULL)) {
575 server_cred = acquired_cred;
577 maj = gss_inquire_cred(&min, server_cred, &server,
579 if (GSS_ERROR(maj)) {
580 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
581 "%s", mag_error(req, "gss_inquired_cred_() "
582 "failed", maj, min));
585 if (server_cred != acquired_cred) {
586 gss_release_cred(&min, &server_cred);
589 #ifdef HAVE_CRED_STORE
590 if (cfg->deleg_ccache_dir) {
591 /* delegate ourselves credentials so we store them as requested */
592 init_flags |= GSS_C_DELEG_FLAG;
596 /* output and input are inverted here, this is intentional */
597 maj = gss_init_sec_context(&min, user_cred, &user_ctx, server,
598 GSS_C_NO_OID, init_flags, 300,
599 GSS_C_NO_CHANNEL_BINDINGS, &output,
600 NULL, &input, NULL, NULL);
601 if (GSS_ERROR(maj)) {
602 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
603 "%s", mag_error(req, "gss_init_sec_context() "
604 "failed", maj, min));
609 if (auth_type == AUTH_TYPE_NEGOTIATE &&
610 cfg->allowed_mechs != GSS_C_NO_OID_SET) {
611 maj = gss_set_neg_mechs(&min, acquired_cred, cfg->allowed_mechs);
612 if (GSS_ERROR(maj)) {
613 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
614 mag_error(req, "gss_set_neg_mechs() failed",
620 maj = gss_accept_sec_context(&min, pctx, acquired_cred,
621 &input, GSS_C_NO_CHANNEL_BINDINGS,
622 &client, &mech_type, &output, &flags, &vtime,
624 if (GSS_ERROR(maj)) {
625 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
626 mag_error(req, "gss_accept_sec_context() failed",
630 if (auth_type == AUTH_TYPE_BASIC) {
631 while (maj == GSS_S_CONTINUE_NEEDED) {
632 gss_release_buffer(&min, &input);
633 /* output and input are inverted here, this is intentional */
634 maj = gss_init_sec_context(&min, user_cred, &user_ctx, server,
635 GSS_C_NO_OID, init_flags, 300,
636 GSS_C_NO_CHANNEL_BINDINGS, &output,
637 NULL, &input, NULL, NULL);
638 if (GSS_ERROR(maj)) {
639 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
640 "%s", mag_error(req, "gss_init_sec_context() "
641 "failed", maj, min));
644 gss_release_buffer(&min, &output);
645 maj = gss_accept_sec_context(&min, pctx, acquired_cred,
646 &input, GSS_C_NO_CHANNEL_BINDINGS,
647 &client, &mech_type, &output, &flags,
648 &vtime, &delegated_cred);
649 if (GSS_ERROR(maj)) {
650 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
651 "%s", mag_error(req, "gss_accept_sec_context()"
652 " failed", maj, min));
656 } else if (maj == GSS_S_CONTINUE_NEEDED) {
658 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
659 "Mechanism needs continuation but neither "
660 "GssapiConnectionBound nor "
661 "GssapiUseSessions are available");
662 gss_release_buffer(&min, &output);
665 /* auth not complete send token and wait next packet */
669 /* Always set the GSS name in an env var */
670 maj = gss_display_name(&min, client, &name, NULL);
671 if (GSS_ERROR(maj)) {
672 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
673 mag_error(req, "gss_display_name() failed",
677 clientname = apr_pstrndup(req->pool, name.value, name.length);
678 apr_table_set(req->subprocess_env, "GSS_NAME", clientname);
679 expiration = time(NULL) + vtime;
680 apr_table_set(req->subprocess_env, "GSS_SESSION_EXPIRATION",
681 apr_psprintf(req->pool, "%ld", (long)expiration));
683 #ifdef HAVE_CRED_STORE
684 if (cfg->deleg_ccache_dir && delegated_cred != GSS_C_NO_CREDENTIAL) {
685 char *ccachefile = NULL;
687 mag_store_deleg_creds(req, cfg->deleg_ccache_dir, clientname,
688 delegated_cred, &ccachefile);
691 mag_set_KRB5CCANME(req, ccachefile);
695 mc->delegated = true;
700 if (cfg->map_to_local) {
701 maj = gss_localname(&min, client, mech_type, &lname);
702 if (maj != GSS_S_COMPLETE) {
703 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req, "%s",
704 mag_error(req, "gss_localname() failed", maj, min));
707 req->user = apr_pstrndup(req->pool, lname.value, lname.length);
709 req->user = clientname;
713 mc->user_name = apr_pstrdup(mc->parent, req->user);
714 mc->gss_name = apr_pstrdup(mc->parent, clientname);
715 mc->established = true;
716 if (vtime == GSS_C_INDEFINITE || vtime < MIN_SESS_EXP_TIME) {
717 vtime = MIN_SESS_EXP_TIME;
719 mc->expiration = expiration;
720 mc->auth_type = auth_type;
721 if (auth_type == AUTH_TYPE_BASIC) {
722 mag_basic_cache(cfg, mc, ba_user, ba_pwd);
724 if (cfg->use_sessions) {
725 mag_attempt_session(req, cfg, mc);
729 if (cfg->send_persist)
730 apr_table_set(req->headers_out, "Persistent-Auth",
731 cfg->gss_conn_ctx ? "true" : "false");
736 if ((auth_type != AUTH_TYPE_BASIC) && (output.length != 0)) {
737 int prefixlen = strlen(auth_types[auth_type]) + 1;
738 replen = apr_base64_encode_len(output.length) + 1;
739 reply = apr_pcalloc(req->pool, prefixlen + replen);
741 memcpy(reply, auth_types[auth_type], prefixlen - 1);
742 reply[prefixlen - 1] = ' ';
743 apr_base64_encode(&reply[prefixlen], output.value, output.length);
744 apr_table_add(req->err_headers_out,
745 "WWW-Authenticate", reply);
747 } else if (ret == HTTP_UNAUTHORIZED) {
748 apr_table_add(req->err_headers_out, "WWW-Authenticate", "Negotiate");
749 if (is_mech_allowed(cfg, &gss_mech_ntlmssp)) {
750 apr_table_add(req->err_headers_out, "WWW-Authenticate", "NTLM");
752 if (cfg->use_basic_auth) {
753 apr_table_add(req->err_headers_out,
755 apr_psprintf(req->pool, "Basic realm=\"%s\"",
759 #ifdef HAVE_GSS_KRB5_CCACHE_NAME
760 if (user_ccache != NULL) {
761 maj = gss_krb5_ccache_name(&min, orig_ccache, NULL);
762 if (maj != GSS_S_COMPLETE) {
763 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, req,
764 "Failed to restore per-thread ccache, %s",
765 mag_error(req, "gss_krb5_ccache_name() "
766 "failed", maj, min));
770 if (ctx != GSS_C_NO_CONTEXT)
771 gss_delete_sec_context(&min, &ctx, GSS_C_NO_BUFFER);
772 gss_delete_sec_context(&min, &user_ctx, GSS_C_NO_BUFFER);
773 gss_release_cred(&min, &user_cred);
774 gss_release_cred(&min, &acquired_cred);
775 gss_release_cred(&min, &delegated_cred);
776 gss_release_buffer(&min, &output);
777 gss_release_name(&min, &client);
778 gss_release_name(&min, &server);
779 gss_release_buffer(&min, &name);
780 gss_release_buffer(&min, &lname);
785 static void *mag_create_dir_config(apr_pool_t *p, char *dir)
787 struct mag_config *cfg;
789 cfg = (struct mag_config *)apr_pcalloc(p, sizeof(struct mag_config));
795 static const char *mag_ssl_only(cmd_parms *parms, void *mconfig, int on)
797 struct mag_config *cfg = (struct mag_config *)mconfig;
798 cfg->ssl_only = on ? true : false;
802 static const char *mag_map_to_local(cmd_parms *parms, void *mconfig, int on)
804 struct mag_config *cfg = (struct mag_config *)mconfig;
805 cfg->map_to_local = on ? true : false;
809 static const char *mag_conn_ctx(cmd_parms *parms, void *mconfig, int on)
811 struct mag_config *cfg = (struct mag_config *)mconfig;
812 cfg->gss_conn_ctx = on ? true : false;
816 static const char *mag_send_persist(cmd_parms *parms, void *mconfig, int on)
818 struct mag_config *cfg = (struct mag_config *)mconfig;
819 cfg->send_persist = on ? true : false;
823 static const char *mag_use_sess(cmd_parms *parms, void *mconfig, int on)
825 struct mag_config *cfg = (struct mag_config *)mconfig;
826 cfg->use_sessions = on ? true : false;
830 #ifdef HAVE_CRED_STORE
831 static const char *mag_use_s4u2p(cmd_parms *parms, void *mconfig, int on)
833 struct mag_config *cfg = (struct mag_config *)mconfig;
834 cfg->use_s4u2proxy = on ? true : false;
836 if (cfg->deleg_ccache_dir == NULL) {
837 cfg->deleg_ccache_dir = apr_pstrdup(parms->pool, "/tmp");
843 static const char *mag_sess_key(cmd_parms *parms, void *mconfig, const char *w)
845 struct mag_config *cfg = (struct mag_config *)mconfig;
852 if (strncmp(w, "key:", 4) != 0) {
853 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
854 "Invalid key format, expected prefix 'key:'");
859 l = apr_base64_decode_len(k);
860 val = apr_palloc(parms->temp_pool, l);
862 keys.length = (int)apr_base64_decode_binary(val, k);
863 keys.value = (unsigned char *)val;
865 if (keys.length != 32) {
866 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
867 "Invalid key length, expected 32 got %d", keys.length);
871 rc = SEAL_KEY_CREATE(cfg->pool, &cfg->mag_skey, &keys);
873 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
874 "Failed to import sealing key!");
879 #ifdef HAVE_CRED_STORE
881 #define MAX_CRED_OPTIONS 10
883 static const char *mag_cred_store(cmd_parms *parms, void *mconfig,
886 struct mag_config *cfg = (struct mag_config *)mconfig;
887 gss_key_value_element_desc *elements;
896 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
897 "%s [%s]", "Invalid syntax for GssapiCredStore option", w);
901 key = apr_pstrndup(parms->pool, w, (p-w));
902 value = apr_pstrdup(parms->pool, p + 1);
904 if (!cfg->cred_store) {
905 cfg->cred_store = apr_pcalloc(parms->pool,
906 sizeof(gss_key_value_set_desc));
907 size = sizeof(gss_key_value_element_desc) * MAX_CRED_OPTIONS;
908 cfg->cred_store->elements = apr_palloc(parms->pool, size);
911 elements = cfg->cred_store->elements;
912 count = cfg->cred_store->count;
914 if (count >= MAX_CRED_OPTIONS) {
915 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
916 "Too many GssapiCredStore options (MAX: %d)",
920 cfg->cred_store->count++;
922 elements[count].key = key;
923 elements[count].value = value;
928 static const char *mag_deleg_ccache_dir(cmd_parms *parms, void *mconfig,
931 struct mag_config *cfg = (struct mag_config *)mconfig;
933 cfg->deleg_ccache_dir = apr_pstrdup(parms->pool, value);
939 static const char *mag_use_basic_auth(cmd_parms *parms, void *mconfig, int on)
941 struct mag_config *cfg = (struct mag_config *)mconfig;
943 cfg->use_basic_auth = on ? true : false;
947 #define MAX_ALLOWED_MECHS 10
949 static const char *mag_allow_mech(cmd_parms *parms, void *mconfig,
952 struct mag_config *cfg = (struct mag_config *)mconfig;
956 if (!cfg->allowed_mechs) {
957 cfg->allowed_mechs = apr_pcalloc(parms->pool,
958 sizeof(gss_OID_set_desc));
959 size = sizeof(gss_OID) * MAX_ALLOWED_MECHS;
960 cfg->allowed_mechs->elements = apr_palloc(parms->pool, size);
963 if (strcmp(w, "krb5") == 0) {
965 } else if (strcmp(w, "iakerb") == 0) {
966 oid = gss_mech_iakerb;
967 } else if (strcmp(w, "ntlmssp") == 0) {
968 oid = &gss_mech_ntlmssp;
970 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
971 "Unrecognized GSSAPI Mechanism: %s", w);
975 if (cfg->allowed_mechs->count >= MAX_ALLOWED_MECHS) {
976 ap_log_error(APLOG_MARK, APLOG_ERR, 0, parms->server,
977 "Too many GssapiAllowedMech options (MAX: %d)",
981 cfg->allowed_mechs->elements[cfg->allowed_mechs->count] = *oid;
982 cfg->allowed_mechs->count++;
987 static const command_rec mag_commands[] = {
988 AP_INIT_FLAG("GssapiSSLonly", mag_ssl_only, NULL, OR_AUTHCFG,
989 "Work only if connection is SSL Secured"),
990 AP_INIT_FLAG("GssapiLocalName", mag_map_to_local, NULL, OR_AUTHCFG,
991 "Translate principals to local names"),
992 AP_INIT_FLAG("GssapiConnectionBound", mag_conn_ctx, NULL, OR_AUTHCFG,
993 "Authentication is bound to the TCP connection"),
994 AP_INIT_FLAG("GssapiSignalPersistentAuth", mag_send_persist, NULL, OR_AUTHCFG,
995 "Send Persitent-Auth header according to connection bound"),
996 AP_INIT_FLAG("GssapiUseSessions", mag_use_sess, NULL, OR_AUTHCFG,
997 "Authentication uses mod_sessions to hold status"),
998 AP_INIT_RAW_ARGS("GssapiSessionKey", mag_sess_key, NULL, OR_AUTHCFG,
999 "Key Used to seal session data."),
1000 #ifdef HAVE_CRED_STORE
1001 AP_INIT_FLAG("GssapiUseS4U2Proxy", mag_use_s4u2p, NULL, OR_AUTHCFG,
1002 "Initializes credentials for s4u2proxy usage"),
1003 AP_INIT_ITERATE("GssapiCredStore", mag_cred_store, NULL, OR_AUTHCFG,
1004 "Credential Store"),
1005 AP_INIT_RAW_ARGS("GssapiDelegCcacheDir", mag_deleg_ccache_dir, NULL,
1006 OR_AUTHCFG, "Directory to store delegated credentials"),
1008 #ifdef HAVE_GSS_ACQUIRE_CRED_WITH_PASSWORD
1009 AP_INIT_FLAG("GssapiBasicAuth", mag_use_basic_auth, NULL, OR_AUTHCFG,
1010 "Allows use of Basic Auth for authentication"),
1012 AP_INIT_ITERATE("GssapiAllowedMech", mag_allow_mech, NULL, OR_AUTHCFG,
1013 "Allowed Mechanisms"),
1018 mag_register_hooks(apr_pool_t *p)
1020 ap_hook_check_user_id(mag_auth, NULL, NULL, APR_HOOK_MIDDLE);
1021 ap_hook_post_config(mag_post_config, NULL, NULL, APR_HOOK_MIDDLE);
1022 ap_hook_pre_connection(mag_pre_connection, NULL, NULL, APR_HOOK_MIDDLE);
1025 module AP_MODULE_DECLARE_DATA auth_gssapi_module =
1027 STANDARD20_MODULE_STUFF,
1028 mag_create_dir_config,