2 * Copyright (c) 2012, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of JANET(UK) nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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31 * OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include <sys/socket.h>
35 #include <netinet/in.h>
36 #include <arpa/inet.h>
38 #include <openssl/dh.h>
42 #include <trust_router/tr_name.h>
43 #include <trust_router/tid.h>
45 enum msg_type tr_msg_get_msg_type(TR_MSG *msg)
50 void tr_msg_set_msg_type(TR_MSG *msg, enum msg_type type)
55 TID_REQ *tr_msg_get_req(TR_MSG *msg)
60 void tr_msg_set_req(TR_MSG *msg, TID_REQ *req)
65 TID_RESP *tr_msg_get_resp(TR_MSG *msg)
70 void tr_msg_set_resp(TR_MSG *msg, TID_RESP *resp)
75 static json_t *tr_msg_encode_dh(DH *dh)
80 if ((!dh) || (!dh->p) || (!dh->g) || (!dh->pub_key))
85 jbn = json_string(BN_bn2hex(dh->p));
86 json_object_set_new(jdh, "dh_p", jbn);
88 jbn = json_string(BN_bn2hex(dh->g));
89 json_object_set_new(jdh, "dh_g", jbn);
91 jbn = json_string(BN_bn2hex(dh->pub_key));
92 json_object_set_new(jdh, "dh_pub_key", jbn);
97 static DH *tr_msg_decode_dh(json_t *jdh)
102 json_t *jpub_key = NULL;
104 if (!(dh = malloc(sizeof(DH)))) {
105 fprintf (stderr, "tr_msg_decode_dh(): Error allocating DH structure.\n");
109 memset(dh, 0, sizeof(DH));
111 /* store required fields from dh object */
112 if ((NULL == (jp = json_object_get(jdh, "dh_p"))) ||
113 (NULL == (jg = json_object_get(jdh, "dh_g"))) ||
114 (NULL == (jpub_key = json_object_get(jdh, "dh_pub_key")))) {
115 fprintf (stderr, "tr_msg_decode_dh(): Error parsing dh_info.\n");
120 BN_hex2bn(&(dh->p), json_string_value(jp));
121 BN_hex2bn(&(dh->g), json_string_value(jg));
122 BN_hex2bn(&(dh->pub_key), json_string_value(jpub_key));
127 static json_t * tr_msg_encode_tidreq(TID_REQ *req)
132 if ((!req) || (!req->rp_realm) || (!req->realm) || !(req->comm))
135 jreq = json_object();
137 jstr = json_string(req->rp_realm->buf);
138 json_object_set_new(jreq, "rp_realm", jstr);
140 jstr = json_string(req->realm->buf);
141 json_object_set_new(jreq, "target_realm", jstr);
143 jstr = json_string(req->comm->buf);
144 json_object_set_new(jreq, "community", jstr);
147 jstr = json_string(req->orig_coi->buf);
148 json_object_set_new(jreq, "orig_coi", jstr);
151 json_object_set_new(jreq, "dh_info", tr_msg_encode_dh(req->tidc_dh));
156 static TID_REQ *tr_msg_decode_tidreq(json_t *jreq)
158 TID_REQ *treq = NULL;
159 json_t *jrp_realm = NULL;
160 json_t *jrealm = NULL;
161 json_t *jcomm = NULL;
162 json_t *jorig_coi = NULL;
165 if (!(treq = malloc(sizeof(TID_REQ)))) {
166 fprintf (stderr, "tr_msg_decode_tidreq(): Error allocating TID_REQ structure.\n");
170 memset(treq, 0, sizeof(TID_REQ));
172 /* store required fields from request */
173 if ((NULL == (jrp_realm = json_object_get(jreq, "rp_realm"))) ||
174 (NULL == (jrealm = json_object_get(jreq, "target_realm"))) ||
175 (NULL == (jcomm = json_object_get(jreq, "community")))) {
176 fprintf (stderr, "tr_msg_decode(): Error parsing required fields.\n");
181 treq->rp_realm = tr_new_name((char *)json_string_value(jrp_realm));
182 treq->realm = tr_new_name((char *)json_string_value(jrealm));
183 treq->comm = tr_new_name((char *)json_string_value(jcomm));
185 /* Get DH Info from the request */
186 if (NULL == (jdh = json_object_get(jreq, "dh_info"))) {
187 fprintf (stderr, "tr_msg_decode(): Error parsing dh_info.\n");
191 treq->tidc_dh = tr_msg_decode_dh(jdh);
193 /* store optional "orig_coi" field */
194 if (NULL != (jorig_coi = json_object_get(jreq, "orig_coi"))) {
195 treq->orig_coi = tr_new_name((char *)json_string_value(jorig_coi));
201 static json_t *tr_msg_encode_one_server(TID_SRVR_BLK *srvr)
203 json_t *jsrvr = NULL;
206 fprintf(stderr, "Encoding one server.\n");
208 jsrvr = json_object();
210 /* Server IP Address -- TBD handle IPv6 */
211 jstr = json_string(inet_ntoa(srvr->aaa_server_addr));
212 json_object_set_new(jsrvr, "server_addr", jstr);
214 /* Server DH Block */
215 jstr = json_string(srvr->key_name->buf);
216 json_object_set_new(jsrvr, "key_name", jstr);
217 json_object_set_new(jsrvr, "server_dh", tr_msg_encode_dh(srvr->aaa_server_dh));
219 // fprintf(stderr,"tr_msg_encode_one_server(): jsrvr contains:\n");
220 // fprintf(stderr,"%s\n", json_dumps(jsrvr, 0));
224 static TID_SRVR_BLK *tr_msg_decode_one_server(json_t *jsrvr)
227 json_t *jsrvr_addr = NULL;
228 json_t *jsrvr_kn = NULL;
229 json_t *jsrvr_dh = NULL;
234 if (NULL == (srvr = malloc(sizeof(TID_SRVR_BLK))))
236 memset(srvr, 0, sizeof(TID_SRVR_BLK));
238 if ((NULL == (jsrvr_addr = json_object_get(jsrvr, "server_addr"))) ||
239 (NULL == (jsrvr_kn = json_object_get(jsrvr, "key_name"))) ||
240 (NULL == (jsrvr_dh = json_object_get(jsrvr, "server_dh")))) {
241 fprintf (stderr, "tr_msg_decode_one_server(): Error parsing required fields.\n");
246 /* TBD -- handle IPv6 Addresses */
247 inet_aton(json_string_value(jsrvr_addr), &(srvr->aaa_server_addr));
248 srvr->key_name = tr_new_name((char *)json_string_value(jsrvr_kn));
249 srvr->aaa_server_dh = tr_msg_decode_dh(jsrvr_dh);
254 static json_t *tr_msg_encode_servers(TID_SRVR_BLK *servers)
256 json_t *jservers = NULL;
257 json_t *jsrvr = NULL;
258 TID_SRVR_BLK *srvr = NULL;
260 jservers = json_array();
262 for (srvr = servers; srvr != NULL; srvr = srvr->next) {
263 if ((NULL == (jsrvr = tr_msg_encode_one_server(srvr))) ||
264 (-1 == json_array_append_new(jservers, jsrvr))) {
269 // fprintf(stderr,"tr_msg_encode_servers(): servers contains:\n");
270 // fprintf(stderr,"%s\n", json_dumps(jservers, 0));
274 static TID_SRVR_BLK *tr_msg_decode_servers(json_t *jservers)
276 TID_SRVR_BLK *servers = NULL;
277 TID_SRVR_BLK *next = NULL;
278 TID_SRVR_BLK *srvr = NULL;
280 size_t i, num_servers;
282 num_servers = json_array_size(jservers);
283 fprintf(stderr, "tr_msg_decode_servers(): Number of servers = %u.\n", (unsigned) num_servers);
285 if (0 == num_servers) {
286 fprintf(stderr, "tr_msg_decode_servers(): Server array is empty.\n");
290 for (i = 0; i < num_servers; i++) {
291 jsrvr = json_array_get(jservers, i);
292 srvr = tr_msg_decode_one_server(jsrvr);
294 /* skip to the end of the list, and add srvr to list of servers */
295 if (NULL == servers) {
299 for (next = servers; next->next != NULL; next = next->next);
307 static json_t * tr_msg_encode_tidresp(TID_RESP *resp)
309 json_t *jresp = NULL;
311 json_t *jservers = NULL;
313 if ((!resp) || (!resp->rp_realm) || (!resp->realm) || !(resp->comm))
316 jresp = json_object();
318 if (TID_ERROR == resp->result) {
319 jstr = json_string("error");
320 json_object_set_new(jresp, "result", jstr);
322 jstr = json_string(resp->err_msg->buf);
323 json_object_set_new(jresp, "err_msg", jstr);
327 jstr = json_string("success");
328 json_object_set_new(jresp, "result", jstr);
331 jstr = json_string(resp->rp_realm->buf);
332 json_object_set_new(jresp, "rp_realm", jstr);
334 jstr = json_string(resp->realm->buf);
335 json_object_set_new(jresp, "target_realm", jstr);
337 jstr = json_string(resp->comm->buf);
338 json_object_set_new(jresp, "comm", jstr);
340 if (resp->orig_coi) {
341 jstr = json_string(resp->orig_coi->buf);
342 json_object_set_new(jresp, "orig_coi", jstr);
345 if (NULL == resp->servers) {
346 fprintf(stderr, "tr_msg_encode_tidresp(): No servers to encode.\n");
349 jservers = tr_msg_encode_servers(resp->servers);
350 json_object_set_new(jresp, "servers", jservers);
355 static TID_RESP *tr_msg_decode_tidresp(json_t *jresp)
357 TID_RESP *tresp = NULL;
358 json_t *jresult = NULL;
359 json_t *jrp_realm = NULL;
360 json_t *jrealm = NULL;
361 json_t *jcomm = NULL;
362 json_t *jorig_coi = NULL;
363 json_t *jservers = NULL;
364 json_t *jerr_msg = NULL;
366 if (!(tresp = malloc(sizeof(TID_RESP)))) {
367 fprintf (stderr, "tr_msg_decode_tidresp(): Error allocating TID_RESP structure.\n");
371 memset(tresp, 0, sizeof(TID_RESP));
373 /* store required fields from response */
374 if ((NULL == (jresult = json_object_get(jresp, "result"))) ||
375 (!json_is_string(jresult)) ||
376 (NULL == (jrp_realm = json_object_get(jresp, "rp_realm"))) ||
377 (!json_is_string(jrp_realm)) ||
378 (NULL == (jrealm = json_object_get(jresp, "target_realm"))) ||
379 (!json_is_string(jrealm)) ||
380 (NULL == (jcomm = json_object_get(jresp, "comm"))) ||
381 (!json_is_string(jcomm))) {
382 fprintf (stderr, "tr_msg_decode_tidresp(): Error parsing response.\n");
387 if (0 == (strcmp(json_string_value(jresult), "success"))) {
388 fprintf(stderr, "tr_msg_decode_tidresp(): Success! result = %s.\n", json_string_value(jresult));
389 if ((NULL != (jservers = json_object_get(jresp, "servers"))) ||
390 (!json_is_array(jservers))) {
391 tresp->servers = tr_msg_decode_servers(jservers);
396 tresp->result = TID_SUCCESS;
399 tresp->result = TID_ERROR;
400 fprintf(stderr, "tr_msg_decode_tidresp(): Error! result = %s.\n", json_string_value(jresult));
401 if ((NULL != (jerr_msg = json_object_get(jresp, "err_msg"))) ||
402 (!json_is_string(jerr_msg))) {
403 tresp->err_msg = tr_new_name((char *)json_string_value(jerr_msg));
407 tresp->rp_realm = tr_new_name((char *)json_string_value(jrp_realm));
408 tresp->realm = tr_new_name((char *)json_string_value(jrealm));
409 tresp->comm = tr_new_name((char *)json_string_value(jcomm));
411 /* store optional "orig_coi" field */
412 if ((NULL != (jorig_coi = json_object_get(jresp, "orig_coi"))) &&
413 (!json_is_object(jorig_coi))) {
414 tresp->orig_coi = tr_new_name((char *)json_string_value(jorig_coi));
420 char *tr_msg_encode(TR_MSG *msg)
425 /* TBD -- add error handling */
426 jmsg = json_object();
428 switch (msg->msg_type)
431 jmsg_type = json_string("tid_request");
432 json_object_set_new(jmsg, "msg_type", jmsg_type);
433 json_object_set_new(jmsg, "msg_body", tr_msg_encode_tidreq(msg->tid_req));
437 jmsg_type = json_string("tid_response");
438 json_object_set_new(jmsg, "msg_type", jmsg_type);
439 json_object_set_new(jmsg, "msg_body", tr_msg_encode_tidresp(msg->tid_resp));
442 /* TBD -- Add TR message types */
449 return(json_dumps(jmsg, 0));
452 TR_MSG *tr_msg_decode(char *jbuf, size_t buflen)
459 const char *mtype = NULL;
461 if (NULL == (jmsg = json_loadb(jbuf, buflen, JSON_DISABLE_EOF_CHECK, &rc))) {
462 fprintf (stderr, "tr_msg_decode(): error loading object\n");
466 if (!(msg = malloc(sizeof(TR_MSG)))) {
467 fprintf (stderr, "tr_msg_decode(): Error allocating TR_MSG structure.\n");
472 memset(msg, 0, sizeof(TR_MSG));
474 if ((NULL == (jtype = json_object_get(jmsg, "msg_type"))) ||
475 (NULL == (jbody = json_object_get(jmsg, "msg_body")))) {
476 fprintf (stderr, "tr_msg_decode(): Error parsing message header.\n");
478 tr_msg_free_decoded(msg);
482 mtype = json_string_value(jtype);
484 if (0 == strcmp(mtype, "tid_request")) {
485 msg->msg_type = TID_REQUEST;
486 msg->tid_req = tr_msg_decode_tidreq(jbody);
488 else if (0 == strcmp(mtype, "tid_response")) {
489 msg->msg_type = TID_RESPONSE;
490 msg->tid_resp = tr_msg_decode_tidresp(jbody);
493 msg->msg_type = TR_UNKNOWN;
499 void tr_msg_free_encoded(char *jmsg)
505 void tr_msg_free_decoded(TR_MSG *msg)