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)
65 void tr_msg_set_req(TR_MSG *msg, TID_REQ *req)
70 TID_RESP *tr_msg_get_resp(TR_MSG *msg)
75 void tr_msg_set_resp(TR_MSG *msg, TID_RESP *resp)
80 static json_t *tr_msg_encode_dh(DH *dh)
85 if ((!dh) || (!dh->p) || (!dh->g) || (!dh->pub_key))
90 jbn = json_string(BN_bn2hex(dh->p));
91 json_object_set_new(jdh, "dh_p", jbn);
93 jbn = json_string(BN_bn2hex(dh->g));
94 json_object_set_new(jdh, "dh_g", jbn);
96 jbn = json_string(BN_bn2hex(dh->pub_key));
97 json_object_set_new(jdh, "dh_pub_key", jbn);
102 static DH *tr_msg_decode_dh(json_t *jdh)
107 json_t *jpub_key = NULL;
109 if (!(dh = malloc(sizeof(DH)))) {
110 fprintf (stderr, "tr_msg_decode_dh(): Error allocating DH structure.\n");
114 memset(dh, 0, sizeof(DH));
116 /* store required fields from dh object */
117 if ((NULL == (jp = json_object_get(jdh, "dh_p"))) ||
118 (NULL == (jg = json_object_get(jdh, "dh_g"))) ||
119 (NULL == (jpub_key = json_object_get(jdh, "dh_pub_key")))) {
120 fprintf (stderr, "tr_msg_decode_dh(): Error parsing dh_info.\n");
125 BN_hex2bn(&(dh->p), json_string_value(jp));
126 BN_hex2bn(&(dh->g), json_string_value(jg));
127 BN_hex2bn(&(dh->pub_key), json_string_value(jpub_key));
132 static json_t * tr_msg_encode_tidreq(TID_REQ *req)
137 if ((!req) || (!req->rp_realm) || (!req->realm) || !(req->comm))
140 assert(jreq = json_object());
142 jstr = json_string(req->rp_realm->buf);
143 json_object_set_new(jreq, "rp_realm", jstr);
145 jstr = json_string(req->realm->buf);
146 json_object_set_new(jreq, "target_realm", jstr);
148 jstr = json_string(req->comm->buf);
149 json_object_set_new(jreq, "community", jstr);
152 jstr = json_string(req->orig_coi->buf);
153 json_object_set_new(jreq, "orig_coi", jstr);
156 json_object_set_new(jreq, "dh_info", tr_msg_encode_dh(req->tidc_dh));
159 json_object_set(jreq, "constraints", (json_t *) req->cons);
164 static TID_REQ *tr_msg_decode_tidreq(json_t *jreq)
166 TID_REQ *treq = NULL;
167 json_t *jrp_realm = NULL;
168 json_t *jrealm = NULL;
169 json_t *jcomm = NULL;
170 json_t *jorig_coi = NULL;
173 if (!(treq =tid_req_new())) {
174 fprintf (stderr, "tr_msg_decode_tidreq(): Error allocating TID_REQ structure.\n");
178 /* store required fields from request */
179 if ((NULL == (jrp_realm = json_object_get(jreq, "rp_realm"))) ||
180 (NULL == (jrealm = json_object_get(jreq, "target_realm"))) ||
181 (NULL == (jcomm = json_object_get(jreq, "community")))) {
182 fprintf (stderr, "tr_msg_decode(): Error parsing required fields.\n");
187 treq->rp_realm = tr_new_name((char *)json_string_value(jrp_realm));
188 treq->realm = tr_new_name((char *)json_string_value(jrealm));
189 treq->comm = tr_new_name((char *)json_string_value(jcomm));
191 /* Get DH Info from the request */
192 if (NULL == (jdh = json_object_get(jreq, "dh_info"))) {
193 fprintf (stderr, "tr_msg_decode(): Error parsing dh_info.\n");
197 treq->tidc_dh = tr_msg_decode_dh(jdh);
199 /* store optional "orig_coi" field */
200 if (NULL != (jorig_coi = json_object_get(jreq, "orig_coi"))) {
201 treq->orig_coi = tr_new_name((char *)json_string_value(jorig_coi));
204 treq->cons = (TR_CONSTRAINT_SET *) json_object_get(jreq, "constraints");
206 if (!tr_constraint_set_validate(treq->cons)) {
207 tr_debug("Constraint set validation failed\n");
211 json_incref((json_t *) treq->cons);
212 tid_req_cleanup_json(treq, (json_t *) treq->cons);
217 static json_t *tr_msg_encode_one_server(TID_SRVR_BLK *srvr)
219 json_t *jsrvr = NULL;
222 fprintf(stderr, "Encoding one server.\n");
224 jsrvr = json_object();
226 /* Server IP Address -- TBD handle IPv6 */
227 jstr = json_string(inet_ntoa(srvr->aaa_server_addr));
228 json_object_set_new(jsrvr, "server_addr", jstr);
230 /* Server DH Block */
231 jstr = json_string(srvr->key_name->buf);
232 json_object_set_new(jsrvr, "key_name", jstr);
233 json_object_set_new(jsrvr, "server_dh", tr_msg_encode_dh(srvr->aaa_server_dh));
235 // fprintf(stderr,"tr_msg_encode_one_server(): jsrvr contains:\n");
236 // fprintf(stderr,"%s\n", json_dumps(jsrvr, 0));
240 static int tr_msg_decode_one_server(json_t *jsrvr, TID_SRVR_BLK *srvr)
242 json_t *jsrvr_addr = NULL;
243 json_t *jsrvr_kn = NULL;
244 json_t *jsrvr_dh = NULL;
250 if ((NULL == (jsrvr_addr = json_object_get(jsrvr, "server_addr"))) ||
251 (NULL == (jsrvr_kn = json_object_get(jsrvr, "key_name"))) ||
252 (NULL == (jsrvr_dh = json_object_get(jsrvr, "server_dh")))) {
253 tr_debug("tr_msg_decode_one_server(): Error parsing required fields.\n");
257 /* TBD -- handle IPv6 Addresses */
258 inet_aton(json_string_value(jsrvr_addr), &(srvr->aaa_server_addr));
259 srvr->key_name = tr_new_name((char *)json_string_value(jsrvr_kn));
260 srvr->aaa_server_dh = tr_msg_decode_dh(jsrvr_dh);
264 static json_t *tr_msg_encode_servers(TID_RESP *resp)
266 json_t *jservers = NULL;
267 json_t *jsrvr = NULL;
268 TID_SRVR_BLK *srvr = NULL;
271 jservers = json_array();
273 tid_resp_servers_foreach(resp, srvr, index) {
274 if ((NULL == (jsrvr = tr_msg_encode_one_server(srvr))) ||
275 (-1 == json_array_append_new(jservers, jsrvr))) {
280 // fprintf(stderr,"tr_msg_encode_servers(): servers contains:\n");
281 // fprintf(stderr,"%s\n", json_dumps(jservers, 0));
285 static TID_SRVR_BLK *tr_msg_decode_servers(void * ctx, json_t *jservers)
287 TID_SRVR_BLK *servers = NULL;
289 size_t i, num_servers;
291 num_servers = json_array_size(jservers);
292 fprintf(stderr, "tr_msg_decode_servers(): Number of servers = %u.\n", (unsigned) num_servers);
294 if (0 == num_servers) {
295 fprintf(stderr, "tr_msg_decode_servers(): Server array is empty.\n");
298 servers = talloc_zero_array(ctx, TID_SRVR_BLK, num_servers);
300 for (i = 0; i < num_servers; i++) {
301 jsrvr = json_array_get(jservers, i);
302 if (0 != tr_msg_decode_one_server(jsrvr, &servers[i])) {
303 talloc_free(servers);
313 static json_t * tr_msg_encode_tidresp(TID_RESP *resp)
315 json_t *jresp = NULL;
317 json_t *jservers = NULL;
319 if ((!resp) || (!resp->rp_realm) || (!resp->realm) || !(resp->comm))
322 jresp = json_object();
324 if (TID_ERROR == resp->result) {
325 jstr = json_string("error");
326 json_object_set_new(jresp, "result", jstr);
328 jstr = json_string(resp->err_msg->buf);
329 json_object_set_new(jresp, "err_msg", jstr);
333 jstr = json_string("success");
334 json_object_set_new(jresp, "result", jstr);
337 jstr = json_string(resp->rp_realm->buf);
338 json_object_set_new(jresp, "rp_realm", jstr);
340 jstr = json_string(resp->realm->buf);
341 json_object_set_new(jresp, "target_realm", jstr);
343 jstr = json_string(resp->comm->buf);
344 json_object_set_new(jresp, "comm", jstr);
346 if (resp->orig_coi) {
347 jstr = json_string(resp->orig_coi->buf);
348 json_object_set_new(jresp, "orig_coi", jstr);
351 if (NULL == resp->servers) {
352 fprintf(stderr, "tr_msg_encode_tidresp(): No servers to encode.\n");
355 jservers = tr_msg_encode_servers(resp);
356 json_object_set_new(jresp, "servers", jservers);
361 static TID_RESP *tr_msg_decode_tidresp(json_t *jresp)
363 TID_RESP *tresp = NULL;
364 json_t *jresult = NULL;
365 json_t *jrp_realm = NULL;
366 json_t *jrealm = NULL;
367 json_t *jcomm = NULL;
368 json_t *jorig_coi = NULL;
369 json_t *jservers = NULL;
370 json_t *jerr_msg = NULL;
372 if (!(tresp = talloc_zero(NULL, TID_RESP))) {
373 fprintf (stderr, "tr_msg_decode_tidresp(): Error allocating TID_RESP structure.\n");
378 /* store required fields from response */
379 if ((NULL == (jresult = json_object_get(jresp, "result"))) ||
380 (!json_is_string(jresult)) ||
381 (NULL == (jrp_realm = json_object_get(jresp, "rp_realm"))) ||
382 (!json_is_string(jrp_realm)) ||
383 (NULL == (jrealm = json_object_get(jresp, "target_realm"))) ||
384 (!json_is_string(jrealm)) ||
385 (NULL == (jcomm = json_object_get(jresp, "comm"))) ||
386 (!json_is_string(jcomm))) {
387 fprintf (stderr, "tr_msg_decode_tidresp(): Error parsing response.\n");
392 if (0 == (strcmp(json_string_value(jresult), "success"))) {
393 fprintf(stderr, "tr_msg_decode_tidresp(): Success! result = %s.\n", json_string_value(jresult));
394 if ((NULL != (jservers = json_object_get(jresp, "servers"))) ||
395 (!json_is_array(jservers))) {
396 tresp->servers = tr_msg_decode_servers(tresp, jservers);
402 tresp->result = TID_SUCCESS;
405 tresp->result = TID_ERROR;
406 fprintf(stderr, "tr_msg_decode_tidresp(): Error! result = %s.\n", json_string_value(jresult));
407 if ((NULL != (jerr_msg = json_object_get(jresp, "err_msg"))) ||
408 (!json_is_string(jerr_msg))) {
409 tresp->err_msg = tr_new_name((char *)json_string_value(jerr_msg));
413 tresp->rp_realm = tr_new_name((char *)json_string_value(jrp_realm));
414 tresp->realm = tr_new_name((char *)json_string_value(jrealm));
415 tresp->comm = tr_new_name((char *)json_string_value(jcomm));
417 /* store optional "orig_coi" field */
418 if ((NULL != (jorig_coi = json_object_get(jresp, "orig_coi"))) &&
419 (!json_is_object(jorig_coi))) {
420 tresp->orig_coi = tr_new_name((char *)json_string_value(jorig_coi));
426 char *tr_msg_encode(TR_MSG *msg)
431 /* TBD -- add error handling */
432 jmsg = json_object();
434 switch (msg->msg_type)
437 jmsg_type = json_string("tid_request");
438 json_object_set_new(jmsg, "msg_type", jmsg_type);
439 json_object_set_new(jmsg, "msg_body", tr_msg_encode_tidreq(msg->tid_req));
443 jmsg_type = json_string("tid_response");
444 json_object_set_new(jmsg, "msg_type", jmsg_type);
445 json_object_set_new(jmsg, "msg_body", tr_msg_encode_tidresp(msg->tid_resp));
448 /* TBD -- Add TR message types */
455 return(json_dumps(jmsg, 0));
458 TR_MSG *tr_msg_decode(char *jbuf, size_t buflen)
465 const char *mtype = NULL;
467 if (NULL == (jmsg = json_loadb(jbuf, buflen, JSON_DISABLE_EOF_CHECK, &rc))) {
468 fprintf (stderr, "tr_msg_decode(): error loading object\n");
472 if (!(msg = malloc(sizeof(TR_MSG)))) {
473 fprintf (stderr, "tr_msg_decode(): Error allocating TR_MSG structure.\n");
478 memset(msg, 0, sizeof(TR_MSG));
480 if ((NULL == (jtype = json_object_get(jmsg, "msg_type"))) ||
481 (NULL == (jbody = json_object_get(jmsg, "msg_body")))) {
482 fprintf (stderr, "tr_msg_decode(): Error parsing message header.\n");
484 tr_msg_free_decoded(msg);
488 mtype = json_string_value(jtype);
490 if (0 == strcmp(mtype, "tid_request")) {
491 msg->msg_type = TID_REQUEST;
492 msg->tid_req = tr_msg_decode_tidreq(jbody);
494 else if (0 == strcmp(mtype, "tid_response")) {
495 msg->msg_type = TID_RESPONSE;
496 msg->tid_resp = tr_msg_decode_tidresp(jbody);
499 msg->msg_type = TR_UNKNOWN;
505 void tr_msg_free_encoded(char *jmsg)
511 void tr_msg_free_decoded(TR_MSG *msg)