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44 #include <tid_internal.h>
45 #include <trust_router/tr_constraint.h>
46 #include <trust_router/tr_dh.h>
47 #include <openssl/rand.h>
49 static sqlite3 *db = NULL;
50 static sqlite3_stmt *insert_stmt = NULL;
51 static sqlite3_stmt *authorization_insert = NULL;
53 static int create_key_id(char *out_id, size_t len)
55 unsigned char rand_buf[32];
59 strncpy(out_id, "key-", len);
62 if (sizeof(rand_buf)*2+1 < len)
63 len = sizeof(rand_buf)*2 + 1;
65 if (-1 == RAND_pseudo_bytes(rand_buf, bin_len))
67 tr_bin_to_hex(rand_buf, bin_len, out_id, len);
68 out_id[bin_len*2] = '\0';
80 for (lc = 0; lc < len; lc++) {
81 if (strchr(wc[lc], '%')) {
82 *error = talloc_asprintf( req, "Constraint match `%s' is not appropriate for SQL",
86 if ('*' ==wc[lc][0]) {
88 s = talloc_strdup(req, wc[lc]);
98 static int handle_authorizations(TID_REQ *req, const unsigned char *dh_hash,
101 TR_CONSTRAINT_SET *intersected = NULL;
102 const char **domain_wc, **realm_wc;
103 size_t domain_len, realm_len;
104 size_t domain_index, realm_index;
109 tr_debug("Request has no constraints, so no authorizations.");
112 intersected = tr_constraint_set_intersect(req, req->cons);
115 if (0 != tr_constraint_set_get_match_strings(req,
116 intersected, "domain",
117 &domain_wc, &domain_len))
119 if (0 != tr_constraint_set_get_match_strings(req,
120 intersected, "realm",
121 &realm_wc, &realm_len))
123 tr_debug(" %u domain constraint matches and %u realm constraint matches",
124 (unsigned) domain_len, (unsigned) realm_len);
125 if (0 != sqlify_wc(req, domain_wc, domain_len, &error)) {
126 tr_debug("Processing domain constraints: %s", error);
128 }else if (0 != sqlify_wc(req, realm_wc, realm_len, &error)) {
129 tr_debug("Processing realm constraints: %s", error);
132 if (!authorization_insert) {
133 tr_debug( " No database, no authorizations inserted");
136 for (domain_index = 0; domain_index < domain_len; domain_index++)
137 for (realm_index = 0; realm_index < realm_len; realm_index++) {
138 TR_NAME *community = req->orig_coi;
140 community = req->comm;
141 sqlite3_bind_blob(authorization_insert, 1, dh_hash, hash_len, SQLITE_TRANSIENT);
142 sqlite3_bind_text(authorization_insert, 2, community->buf, community->len, SQLITE_TRANSIENT);
143 sqlite3_bind_text(authorization_insert, 3, realm_wc[realm_index], -1, SQLITE_TRANSIENT);
144 sqlite3_bind_text(authorization_insert, 4, domain_wc[domain_index], -1, SQLITE_TRANSIENT);
145 sqlite3_bind_text(authorization_insert, 5, req->comm->buf, req->comm->len, SQLITE_TRANSIENT);
146 sqlite3_result = sqlite3_step(authorization_insert);
147 if (SQLITE_DONE != sqlite3_result)
148 tr_crit("sqlite3: failed to write to database");
149 sqlite3_reset(authorization_insert);
155 static int tids_req_handler (TIDS_INSTANCE *tids,
160 unsigned char *s_keybuf = NULL;
163 unsigned char *pub_digest;
164 size_t pub_digest_len;
167 tr_debug("tids_req_handler: Request received! target_realm = %s, community = %s", req->realm->buf, req->comm->buf);
171 if (!(resp) || !resp) {
172 tr_debug("tids_req_handler: No response structure.");
177 /* Allocate a new server block */
178 if (NULL == (resp->servers = talloc_zero(resp, TID_SRVR_BLK))){
179 tr_crit("tids_req_handler(): malloc failed.");
183 resp->num_servers = 1;
185 /* TBD -- Set up the server IP Address */
187 if (!(req) || !(req->tidc_dh)) {
188 tr_debug("tids_req_handler(): No client DH info.");
192 if ((!req->tidc_dh->p) || (!req->tidc_dh->g)) {
193 tr_debug("tids_req_handler: NULL dh values.");
197 /* Generate the server DH block based on the client DH block */
198 // fprintf(stderr, "Generating the server DH block.\n");
199 // fprintf(stderr, "...from client DH block, dh_g = %s, dh_p = %s.\n", BN_bn2hex(req->tidc_dh->g), BN_bn2hex(req->tidc_dh->p));
201 if (NULL == (resp->servers->aaa_server_dh = tr_create_matching_dh(NULL, 0, req->tidc_dh))) {
202 tr_debug("tids_req_handler: Can't create server DH params.");
206 if (0 == inet_aton(tids->ipaddr, &(resp->servers->aaa_server_addr))) {
207 tr_debug("tids_req_handler: inet_aton() failed.");
211 /* Set the key name */
212 if (-1 == create_key_id(key_id, sizeof(key_id)))
214 resp->servers->key_name = tr_new_name(key_id);
216 /* Generate the server key */
217 // fprintf(stderr, "Generating the server key.\n");
219 if (0 > (s_keylen = tr_compute_dh_key(&s_keybuf,
220 req->tidc_dh->pub_key,
221 resp->servers->aaa_server_dh))) {
222 tr_debug("tids_req_handler: Key computation failed.");
225 if (0 != tr_dh_pub_hash(req,
226 &pub_digest, &pub_digest_len)) {
227 tr_debug("tids_req_handler: Unable to digest client public key");
230 if (0 != handle_authorizations(req, pub_digest, pub_digest_len))
232 resp->servers->path = req->path;
233 if (req->expiration_interval < 1)
234 req->expiration_interval = 1;
235 g_get_current_time(&resp->servers->key_expiration);
236 resp->servers->key_expiration.tv_sec += req->expiration_interval * 60 /*in minutes*/;
238 if (NULL != insert_stmt) {
240 gchar *expiration_str = g_time_val_to_iso8601(&resp->servers->key_expiration);
241 sqlite3_bind_text(insert_stmt, 1, key_id, -1, SQLITE_TRANSIENT);
242 sqlite3_bind_blob(insert_stmt, 2, s_keybuf, s_keylen, SQLITE_TRANSIENT);
243 sqlite3_bind_blob(insert_stmt, 3, pub_digest, pub_digest_len, SQLITE_TRANSIENT);
244 sqlite3_bind_text(insert_stmt, 4, expiration_str, -1, SQLITE_TRANSIENT);
245 sqlite3_result = sqlite3_step(insert_stmt);
246 if (SQLITE_DONE != sqlite3_result)
247 tr_crit("sqlite3: failed to write to database");
248 sqlite3_reset(insert_stmt);
251 /* Print out the key. */
252 // fprintf(stderr, "tids_req_handler(): Server Key Generated (len = %d):\n", s_keylen);
253 // for (i = 0; i < s_keylen; i++) {
254 // fprintf(stderr, "%x", s_keybuf[i]);
256 // fprintf(stderr, "\n");
261 static int auth_handler(gss_name_t gss_name, TR_NAME *client,
262 void *expected_client)
264 TR_NAME *expected_client_trname = (TR_NAME*) expected_client;
265 int result=tr_name_cmp(client, expected_client_trname);
267 tr_notice("Auth denied for incorrect gss-name ('%.*s' requested, expected '%.*s').",
268 client->len, client->buf,
269 expected_client_trname->len, expected_client_trname->buf);
274 /* command-line option setup */
276 /* argp global parameters */
277 const char *argp_program_bug_address=PACKAGE_BUGREPORT; /* bug reporting address */
280 static const char doc[]=PACKAGE_NAME " - TID Server";
281 static const char arg_doc[]="<ip-address> <gss-name> <hostname> <database-name>"; /* string describing arguments, if any */
283 /* define the options here. Fields are:
284 * { long-name, short-name, variable name, options, help description } */
285 static const struct argp_option cmdline_options[] = {
289 /* structure for communicating with option parser */
290 struct cmdline_args {
297 /* parser for individual options - fills in a struct cmdline_args */
298 static error_t parse_option(int key, char *arg, struct argp_state *state)
300 /* get a shorthand to the command line argument structure, part of state */
301 struct cmdline_args *arguments=state->input;
304 case ARGP_KEY_ARG: /* handle argument (not option) */
305 switch (state->arg_num) {
307 arguments->ip_address=arg;
311 arguments->gss_name=arg;
315 arguments->hostname=arg;
319 arguments->database_name=arg;
323 /* too many arguments */
328 case ARGP_KEY_END: /* no more arguments */
329 if (state->arg_num < 4) {
330 /* not enough arguments encountered */
336 return ARGP_ERR_UNKNOWN;
339 return 0; /* success */
342 /* assemble the argp parser */
343 static struct argp argp = {cmdline_options, parse_option, arg_doc, doc};
349 TR_NAME *gssname = NULL;
350 struct cmdline_args opts={NULL};
352 struct pollfd *poll_fds=NULL;
354 /* parse the command line*/
355 argp_parse(&argp, argc, argv, 0, 0, &opts);
357 talloc_set_log_stderr();
359 /* Use standalone logging */
362 /* set logging levels */
363 tr_log_threshold(LOG_CRIT);
364 tr_console_threshold(LOG_DEBUG);
366 gssname = tr_new_name(opts.gss_name);
367 if (SQLITE_OK != sqlite3_open(opts.database_name, &db)) {
368 tr_crit("Error opening database %s", opts.database_name);
371 sqlite3_busy_timeout( db, 1000);
372 sqlite3_prepare_v2(db, "insert into psk_keys_tab (keyid, key, client_dh_pub, key_expiration) values(?, ?, ?, ?)",
373 -1, &insert_stmt, NULL);
374 sqlite3_prepare_v2(db, "insert into authorizations (client_dh_pub, coi, acceptor_realm, hostname, apc) values(?, ?, ?, ?, ?)",
375 -1, &authorization_insert, NULL);
377 /* Create a TID server instance */
378 if (NULL == (tids = tids_create())) {
379 tr_crit("Unable to create TIDS instance, exiting.");
383 tids->ipaddr = opts.ip_address;
385 /* get listener for tids port */
386 tids_socket = tids_get_listener(tids, &tids_req_handler , auth_handler, opts.hostname, TID_PORT, gssname);
388 poll_fds=malloc(sizeof(*poll_fds));
389 if (poll_fds == NULL) {
390 tr_crit("Could not allocate event polling list, exiting.");
394 poll_fds[0].fd=tids_socket;
395 poll_fds[0].events=POLLIN; /* poll on ready for reading */
396 poll_fds[0].revents=0;
398 /* main event loop */
400 if(poll(poll_fds, 1, 1000) > 0) {
401 if (poll_fds[0].revents & POLLIN) {
402 if (0 != tids_accept(tids, tids_socket)) {
403 tr_err("Error handling tids request.");
407 printf("Idle..."); fflush(stdout);
412 /* Clean-up the TID server instance */