2 * Copyright (c) 2012-2014 , JANET(UK)
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34 #include <sys/socket.h>
35 #include <netinet/in.h>
36 #include <arpa/inet.h>
38 #include <openssl/dh.h>
45 #include <trust_router/tr_name.h>
46 #include <tid_internal.h>
47 #include <trust_router/tr_constraint.h>
50 enum msg_type tr_msg_get_msg_type(TR_MSG *msg)
55 void tr_msg_set_msg_type(TR_MSG *msg, enum msg_type type)
60 TID_REQ *tr_msg_get_req(TR_MSG *msg)
62 if (msg->msg_type == TID_REQUEST)
63 return (TID_REQ *)msg->msg_rep;
67 void tr_msg_set_req(TR_MSG *msg, TID_REQ *req)
70 msg->msg_type = TID_REQUEST;
73 TID_RESP *tr_msg_get_resp(TR_MSG *msg)
75 if (msg->msg_type == TID_RESPONSE)
76 return (TID_RESP *)msg->msg_rep;
80 void tr_msg_set_resp(TR_MSG *msg, TID_RESP *resp)
83 msg->msg_type = TID_RESPONSE;
86 static json_t *tr_msg_encode_dh(DH *dh)
91 if ((!dh) || (!dh->p) || (!dh->g) || (!dh->pub_key))
96 jbn = json_string(BN_bn2hex(dh->p));
97 json_object_set_new(jdh, "dh_p", jbn);
99 jbn = json_string(BN_bn2hex(dh->g));
100 json_object_set_new(jdh, "dh_g", jbn);
102 jbn = json_string(BN_bn2hex(dh->pub_key));
103 json_object_set_new(jdh, "dh_pub_key", jbn);
108 static DH *tr_msg_decode_dh(json_t *jdh)
113 json_t *jpub_key = NULL;
115 if (!(dh = malloc(sizeof(DH)))) {
116 tr_crit("tr_msg_decode_dh(): Error allocating DH structure.");
120 memset(dh, 0, sizeof(DH));
122 /* store required fields from dh object */
123 if ((NULL == (jp = json_object_get(jdh, "dh_p"))) ||
124 (NULL == (jg = json_object_get(jdh, "dh_g"))) ||
125 (NULL == (jpub_key = json_object_get(jdh, "dh_pub_key")))) {
126 tr_debug("tr_msg_decode_dh(): Error parsing dh_info.");
131 BN_hex2bn(&(dh->p), json_string_value(jp));
132 BN_hex2bn(&(dh->g), json_string_value(jg));
133 BN_hex2bn(&(dh->pub_key), json_string_value(jpub_key));
138 static json_t * tr_msg_encode_tidreq(TID_REQ *req)
143 if ((!req) || (!req->rp_realm) || (!req->realm) || !(req->comm))
146 assert(jreq = json_object());
148 jstr = json_string(req->rp_realm->buf);
149 json_object_set_new(jreq, "rp_realm", jstr);
151 jstr = json_string(req->realm->buf);
152 json_object_set_new(jreq, "target_realm", jstr);
154 jstr = json_string(req->comm->buf);
155 json_object_set_new(jreq, "community", jstr);
158 jstr = json_string(req->orig_coi->buf);
159 json_object_set_new(jreq, "orig_coi", jstr);
162 json_object_set_new(jreq, "dh_info", tr_msg_encode_dh(req->tidc_dh));
165 json_object_set(jreq, "constraints", (json_t *) req->cons);
170 static TID_REQ *tr_msg_decode_tidreq(json_t *jreq)
172 TID_REQ *treq = NULL;
173 json_t *jrp_realm = NULL;
174 json_t *jrealm = NULL;
175 json_t *jcomm = NULL;
176 json_t *jorig_coi = NULL;
179 if (!(treq =tid_req_new())) {
180 tr_crit("tr_msg_decode_tidreq(): Error allocating TID_REQ structure.");
184 /* store required fields from request */
185 if ((NULL == (jrp_realm = json_object_get(jreq, "rp_realm"))) ||
186 (NULL == (jrealm = json_object_get(jreq, "target_realm"))) ||
187 (NULL == (jcomm = json_object_get(jreq, "community")))) {
188 tr_debug("tr_msg_decode(): Error parsing required fields.");
193 treq->rp_realm = tr_new_name((char *)json_string_value(jrp_realm));
194 treq->realm = tr_new_name((char *)json_string_value(jrealm));
195 treq->comm = tr_new_name((char *)json_string_value(jcomm));
197 /* Get DH Info from the request */
198 if (NULL == (jdh = json_object_get(jreq, "dh_info"))) {
199 tr_debug("tr_msg_decode(): Error parsing dh_info.");
203 treq->tidc_dh = tr_msg_decode_dh(jdh);
205 /* store optional "orig_coi" field */
206 if (NULL != (jorig_coi = json_object_get(jreq, "orig_coi"))) {
207 treq->orig_coi = tr_new_name((char *)json_string_value(jorig_coi));
210 treq->cons = (TR_CONSTRAINT_SET *) json_object_get(jreq, "constraints");
212 if (!tr_constraint_set_validate(treq->cons)) {
213 tr_debug("Constraint set validation failed");
217 json_incref((json_t *) treq->cons);
218 tid_req_cleanup_json(treq, (json_t *) treq->cons);
223 static json_t *tr_msg_encode_one_server(TID_SRVR_BLK *srvr)
225 json_t *jsrvr = NULL;
227 gchar *time_str = g_time_val_to_iso8601(&srvr->key_expiration);
229 tr_debug("Encoding one server.");
231 jsrvr = json_object();
233 /* Server IP Address -- TBD handle IPv6 */
234 jstr = json_string(inet_ntoa(srvr->aaa_server_addr));
235 json_object_set_new(jsrvr, "server_addr", jstr);
237 json_object_set_new(jsrvr,
238 "key_expiration", json_string(time_str));
240 /* Server DH Block */
241 jstr = json_string(srvr->key_name->buf);
242 json_object_set_new(jsrvr, "key_name", jstr);
243 json_object_set_new(jsrvr, "server_dh", tr_msg_encode_dh(srvr->aaa_server_dh));
245 /* The path is owned by the srvr, so grab an extra ref*/
246 json_object_set(jsrvr, "path", srvr->path);
250 static int tr_msg_decode_one_server(json_t *jsrvr, TID_SRVR_BLK *srvr)
252 json_t *jsrvr_addr = NULL;
253 json_t *jsrvr_kn = NULL;
254 json_t *jsrvr_dh = NULL;
260 if ((NULL == (jsrvr_addr = json_object_get(jsrvr, "server_addr"))) ||
261 (NULL == (jsrvr_kn = json_object_get(jsrvr, "key_name"))) ||
262 (NULL == (jsrvr_dh = json_object_get(jsrvr, "server_dh")))) {
263 tr_debug("tr_msg_decode_one_server(): Error parsing required fields.");
267 /* TBD -- handle IPv6 Addresses */
268 inet_aton(json_string_value(jsrvr_addr), &(srvr->aaa_server_addr));
269 srvr->key_name = tr_new_name((char *)json_string_value(jsrvr_kn));
270 srvr->aaa_server_dh = tr_msg_decode_dh(jsrvr_dh);
274 static json_t *tr_msg_encode_servers(TID_RESP *resp)
276 json_t *jservers = NULL;
277 json_t *jsrvr = NULL;
278 TID_SRVR_BLK *srvr = NULL;
281 jservers = json_array();
283 tid_resp_servers_foreach(resp, srvr, index) {
284 if ((NULL == (jsrvr = tr_msg_encode_one_server(srvr))) ||
285 (-1 == json_array_append_new(jservers, jsrvr))) {
290 // tr_debug("tr_msg_encode_servers(): servers contains:");
291 // tr_debug("%s", json_dumps(jservers, 0));
295 static TID_SRVR_BLK *tr_msg_decode_servers(void * ctx, json_t *jservers, size_t *out_len)
297 TID_SRVR_BLK *servers = NULL;
299 size_t i, num_servers;
301 num_servers = json_array_size(jservers);
302 tr_debug("tr_msg_decode_servers(): Number of servers = %u.", (unsigned) num_servers);
304 if (0 == num_servers) {
305 tr_debug("tr_msg_decode_servers(): Server array is empty.");
308 servers = talloc_zero_array(ctx, TID_SRVR_BLK, num_servers);
310 for (i = 0; i < num_servers; i++) {
311 jsrvr = json_array_get(jservers, i);
312 if (0 != tr_msg_decode_one_server(jsrvr, &servers[i])) {
313 talloc_free(servers);
319 *out_len = num_servers;
323 static json_t * tr_msg_encode_tidresp(TID_RESP *resp)
325 json_t *jresp = NULL;
327 json_t *jservers = NULL;
329 if ((!resp) || (!resp->rp_realm) || (!resp->realm) || !(resp->comm))
332 jresp = json_object();
334 if (TID_ERROR == resp->result) {
335 jstr = json_string("error");
336 json_object_set_new(jresp, "result", jstr);
338 jstr = json_string(resp->err_msg->buf);
339 json_object_set_new(jresp, "err_msg", jstr);
343 jstr = json_string("success");
344 json_object_set_new(jresp, "result", jstr);
347 jstr = json_string(resp->rp_realm->buf);
348 json_object_set_new(jresp, "rp_realm", jstr);
350 jstr = json_string(resp->realm->buf);
351 json_object_set_new(jresp, "target_realm", jstr);
353 jstr = json_string(resp->comm->buf);
354 json_object_set_new(jresp, "comm", jstr);
356 if (resp->orig_coi) {
357 jstr = json_string(resp->orig_coi->buf);
358 json_object_set_new(jresp, "orig_coi", jstr);
361 if (NULL == resp->servers) {
362 tr_debug("tr_msg_encode_tidresp(): No servers to encode.");
365 jservers = tr_msg_encode_servers(resp);
366 json_object_set_new(jresp, "servers", jservers);
371 static TID_RESP *tr_msg_decode_tidresp(json_t *jresp)
373 TID_RESP *tresp = NULL;
374 json_t *jresult = NULL;
375 json_t *jrp_realm = NULL;
376 json_t *jrealm = NULL;
377 json_t *jcomm = NULL;
378 json_t *jorig_coi = NULL;
379 json_t *jservers = NULL;
380 json_t *jerr_msg = NULL;
382 if (!(tresp = talloc_zero(NULL, TID_RESP))) {
383 tr_crit("tr_msg_decode_tidresp(): Error allocating TID_RESP structure.");
388 /* store required fields from response */
389 if ((NULL == (jresult = json_object_get(jresp, "result"))) ||
390 (!json_is_string(jresult)) ||
391 (NULL == (jrp_realm = json_object_get(jresp, "rp_realm"))) ||
392 (!json_is_string(jrp_realm)) ||
393 (NULL == (jrealm = json_object_get(jresp, "target_realm"))) ||
394 (!json_is_string(jrealm)) ||
395 (NULL == (jcomm = json_object_get(jresp, "comm"))) ||
396 (!json_is_string(jcomm))) {
397 tr_debug("tr_msg_decode_tidresp(): Error parsing response.");
402 if (0 == (strcmp(json_string_value(jresult), "success"))) {
403 tr_debug("tr_msg_decode_tidresp(): Success! result = %s.", json_string_value(jresult));
404 if ((NULL != (jservers = json_object_get(jresp, "servers"))) ||
405 (!json_is_array(jservers))) {
406 tresp->servers = tr_msg_decode_servers(tresp, jservers, &tresp->num_servers);
412 tresp->result = TID_SUCCESS;
415 tresp->result = TID_ERROR;
416 tr_debug("tr_msg_decode_tidresp(): Error! result = %s.", json_string_value(jresult));
417 if ((NULL != (jerr_msg = json_object_get(jresp, "err_msg"))) ||
418 (!json_is_string(jerr_msg))) {
419 tresp->err_msg = tr_new_name((char *)json_string_value(jerr_msg));
423 tresp->rp_realm = tr_new_name((char *)json_string_value(jrp_realm));
424 tresp->realm = tr_new_name((char *)json_string_value(jrealm));
425 tresp->comm = tr_new_name((char *)json_string_value(jcomm));
427 /* store optional "orig_coi" field */
428 if ((NULL != (jorig_coi = json_object_get(jresp, "orig_coi"))) &&
429 (!json_is_object(jorig_coi))) {
430 tresp->orig_coi = tr_new_name((char *)json_string_value(jorig_coi));
436 char *tr_msg_encode(TR_MSG *msg)
441 /* TBD -- add error handling */
442 jmsg = json_object();
444 switch (msg->msg_type)
447 jmsg_type = json_string("tid_request");
448 json_object_set_new(jmsg, "msg_type", jmsg_type);
449 json_object_set_new(jmsg, "msg_body", tr_msg_encode_tidreq(tr_msg_get_req(msg)));
453 jmsg_type = json_string("tid_response");
454 json_object_set_new(jmsg, "msg_type", jmsg_type);
455 json_object_set_new(jmsg, "msg_body", tr_msg_encode_tidresp(tr_msg_get_resp(msg)));
458 /* TBD -- Add TR message types */
465 return(json_dumps(jmsg, 0));
468 TR_MSG *tr_msg_decode(char *jbuf, size_t buflen)
475 const char *mtype = NULL;
477 if (NULL == (jmsg = json_loadb(jbuf, buflen, JSON_DISABLE_EOF_CHECK, &rc))) {
478 tr_debug("tr_msg_decode(): error loading object");
482 if (!(msg = malloc(sizeof(TR_MSG)))) {
483 tr_debug("tr_msg_decode(): Error allocating TR_MSG structure.");
488 memset(msg, 0, sizeof(TR_MSG));
490 if ((NULL == (jtype = json_object_get(jmsg, "msg_type"))) ||
491 (NULL == (jbody = json_object_get(jmsg, "msg_body")))) {
492 tr_debug("tr_msg_decode(): Error parsing message header.");
494 tr_msg_free_decoded(msg);
498 mtype = json_string_value(jtype);
500 if (0 == strcmp(mtype, "tid_request")) {
501 msg->msg_type = TID_REQUEST;
502 tr_msg_set_req(msg, tr_msg_decode_tidreq(jbody));
504 else if (0 == strcmp(mtype, "tid_response")) {
505 msg->msg_type = TID_RESPONSE;
506 tr_msg_set_resp(msg, tr_msg_decode_tidresp(jbody));
509 msg->msg_type = TR_UNKNOWN;
515 void tr_msg_free_encoded(char *jmsg)
521 void tr_msg_free_decoded(TR_MSG *msg)