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.
12 * 2. Redistributions in binary form must reproduce the above copyright
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 static json_t *tr_msg_encode_dh(DH *dh)
50 if ((!dh) || (!dh->p) || (!dh->g) || (!dh->pub_key))
55 jbn = json_string(BN_bn2hex(dh->p));
56 json_object_set_new(jdh, "dh_p", jbn);
58 jbn = json_string(BN_bn2hex(dh->g));
59 json_object_set_new(jdh, "dh_g", jbn);
61 jbn = json_string(BN_bn2hex(dh->pub_key));
62 json_object_set_new(jdh, "dh_pub_key", jbn);
67 static DH *tr_msg_decode_dh(json_t *jdh)
72 json_t *jpub_key = NULL;
74 if (!(dh = malloc(sizeof(DH)))) {
75 fprintf (stderr, "tr_msg_decode_dh(): Error allocating DH structure.\n");
79 memset(dh, 0, sizeof(DH));
81 /* store required fields from dh object */
82 if ((NULL == (jp = json_object_get(jdh, "dh_p"))) ||
83 (NULL == (jg = json_object_get(jdh, "dh_g"))) ||
84 (NULL == (jpub_key = json_object_get(jdh, "dh_pub_key")))) {
85 fprintf (stderr, "tr_msg_decode_dh(): Error parsing dh_info.\n");
90 BN_hex2bn(&(dh->p), json_string_value(jp));
91 BN_hex2bn(&(dh->g), json_string_value(jg));
92 BN_hex2bn(&(dh->pub_key), json_string_value(jpub_key));
97 static json_t * tr_msg_encode_tidreq(TID_REQ *req)
102 if ((!req) || (!req->rp_realm) || (!req->realm) || !(req->comm))
105 jreq = json_object();
107 jstr = json_string(req->rp_realm->buf);
108 json_object_set_new(jreq, "rp_realm", jstr);
110 jstr = json_string(req->realm->buf);
111 json_object_set_new(jreq, "target_realm", jstr);
113 jstr = json_string(req->comm->buf);
114 json_object_set_new(jreq, "community", jstr);
117 jstr = json_string(req->orig_coi->buf);
118 json_object_set_new(jreq, "orig_coi", jstr);
121 json_object_set_new(jreq, "dh_info", tr_msg_encode_dh(req->tidc_dh));
126 static TID_REQ *tr_msg_decode_tidreq(json_t *jreq)
128 TID_REQ *treq = NULL;
129 json_t *jrp_realm = NULL;
130 json_t *jrealm = NULL;
131 json_t *jcomm = NULL;
132 json_t *jorig_coi = NULL;
135 if (!(treq = malloc(sizeof(TID_REQ)))) {
136 fprintf (stderr, "tr_msg_decode_tidreq(): Error allocating TID_REQ structure.\n");
140 memset(treq, 0, sizeof(TID_REQ));
142 /* store required fields from request */
143 if ((NULL == (jrp_realm = json_object_get(jreq, "rp_realm"))) ||
144 (NULL == (jrealm = json_object_get(jreq, "target_realm"))) ||
145 (NULL == (jcomm = json_object_get(jreq, "community")))) {
146 fprintf (stderr, "tr_msg_decode(): Error parsing required fields.\n");
151 treq->rp_realm = tr_new_name((char *)json_string_value(jrp_realm));
152 treq->realm = tr_new_name((char *)json_string_value(jrealm));
153 treq->comm = tr_new_name((char *)json_string_value(jcomm));
155 /* Get DH Info from the request */
156 if (NULL == (jdh = json_object_get(jreq, "dh_info"))) {
157 fprintf (stderr, "tr_msg_decode(): Error parsing dh_info.\n");
161 treq->tidc_dh = tr_msg_decode_dh(jdh);
163 /* store optional "orig_coi" field */
164 if (NULL != (jorig_coi = json_object_get(jreq, "orig_coi"))) {
165 treq->orig_coi = tr_new_name((char *)json_string_value(jorig_coi));
171 static json_t *tr_msg_encode_one_server(TID_SRVR_BLK *srvr)
173 json_t *jsrvr = NULL;
176 fprintf(stderr, "Encoding one server.\n");
178 jsrvr = json_object();
180 /* Server IP Address -- TBD handle IPv6 */
181 jstr = json_string(inet_ntoa(srvr->aaa_server_addr));
182 json_object_set_new(jsrvr, "server_addr", jstr);
184 /* Server DH Block */
185 jstr = json_string(srvr->key_name->buf);
186 json_object_set_new(jsrvr, "key_name", jstr);
187 json_object_set_new(jsrvr, "server_dh", tr_msg_encode_dh(srvr->aaa_server_dh));
189 // fprintf(stderr,"tr_msg_encode_one_server(): jsrvr contains:\n");
190 // fprintf(stderr,"%s\n", json_dumps(jsrvr, 0));
194 static TID_SRVR_BLK *tr_msg_decode_one_server(json_t *jsrvr)
197 json_t *jsrvr_addr = NULL;
198 json_t *jsrvr_kn = NULL;
199 json_t *jsrvr_dh = NULL;
204 if (NULL == (srvr = malloc(sizeof(TID_SRVR_BLK))))
206 memset(srvr, 0, sizeof(TID_SRVR_BLK));
208 if ((NULL == (jsrvr_addr = json_object_get(jsrvr, "server_addr"))) ||
209 (NULL == (jsrvr_kn = json_object_get(jsrvr, "key_name"))) ||
210 (NULL == (jsrvr_dh = json_object_get(jsrvr, "server_dh")))) {
211 fprintf (stderr, "tr_msg_decode_one_server(): Error parsing required fields.\n");
216 /* TBD -- handle IPv6 Addresses */
217 inet_aton(json_string_value(jsrvr_addr), &(srvr->aaa_server_addr));
218 srvr->key_name = tr_new_name((char *)json_string_value(jsrvr_kn));
219 srvr->aaa_server_dh = tr_msg_decode_dh(jsrvr_dh);
224 static json_t *tr_msg_encode_servers(TID_SRVR_BLK *servers)
226 json_t *jservers = NULL;
227 json_t *jsrvr = NULL;
228 TID_SRVR_BLK *srvr = NULL;
230 jservers = json_array();
232 for (srvr = servers; srvr != NULL; srvr = srvr->next) {
233 if ((NULL == (jsrvr = tr_msg_encode_one_server(srvr))) ||
234 (-1 == json_array_append_new(jservers, jsrvr))) {
239 // fprintf(stderr,"tr_msg_encode_servers(): servers contains:\n");
240 // fprintf(stderr,"%s\n", json_dumps(jservers, 0));
244 static TID_SRVR_BLK *tr_msg_decode_servers(json_t *jservers)
246 TID_SRVR_BLK *servers = NULL;
247 TID_SRVR_BLK *next = NULL;
248 TID_SRVR_BLK *srvr = NULL;
250 size_t i, num_servers;
252 num_servers = json_array_size(jservers);
253 fprintf(stderr, "tr_msg_decode_servers(): Number of servers = %u.\n", (unsigned) num_servers);
255 if (0 == num_servers) {
256 fprintf(stderr, "tr_msg_decode_servers(): Server array is empty.\n");
260 for (i = 0; i < num_servers; i++) {
261 jsrvr = json_array_get(jservers, i);
262 srvr = tr_msg_decode_one_server(jsrvr);
264 /* skip to the end of the list, and add srvr to list of servers */
265 if (NULL == servers) {
269 for (next = servers; next->next != NULL; next = next->next);
277 static json_t * tr_msg_encode_tidresp(TID_RESP *resp)
279 json_t *jresp = NULL;
281 json_t *jservers = NULL;
283 if ((!resp) || (!resp->rp_realm) || (!resp->realm) || !(resp->comm))
286 jresp = json_object();
288 if (TID_ERROR == resp->result) {
289 jstr = json_string("error");
290 json_object_set_new(jresp, "result", jstr);
292 jstr = json_string(resp->err_msg->buf);
293 json_object_set_new(jresp, "err_msg", jstr);
297 jstr = json_string("success");
298 json_object_set_new(jresp, "result", jstr);
301 jstr = json_string(resp->rp_realm->buf);
302 json_object_set_new(jresp, "rp_realm", jstr);
304 jstr = json_string(resp->realm->buf);
305 json_object_set_new(jresp, "target_realm", jstr);
307 jstr = json_string(resp->comm->buf);
308 json_object_set_new(jresp, "comm", jstr);
310 if (resp->orig_coi) {
311 jstr = json_string(resp->orig_coi->buf);
312 json_object_set_new(jresp, "orig_coi", jstr);
315 if (NULL == resp->servers) {
316 fprintf(stderr, "tr_msg_encode_tidresp(): No servers to encode.\n");
319 jservers = tr_msg_encode_servers(resp->servers);
320 json_object_set_new(jresp, "servers", jservers);
325 static TID_RESP *tr_msg_decode_tidresp(json_t *jresp)
327 TID_RESP *tresp = NULL;
328 json_t *jresult = NULL;
329 json_t *jrp_realm = NULL;
330 json_t *jrealm = NULL;
331 json_t *jcomm = NULL;
332 json_t *jorig_coi = NULL;
333 json_t *jservers = NULL;
334 json_t *jerr_msg = NULL;
336 if (!(tresp = malloc(sizeof(TID_RESP)))) {
337 fprintf (stderr, "tr_msg_decode_tidresp(): Error allocating TID_RESP structure.\n");
341 memset(tresp, 0, sizeof(TID_RESP));
343 /* store required fields from response */
344 if ((NULL == (jresult = json_object_get(jresp, "result"))) ||
345 (!json_is_string(jresult)) ||
346 (NULL == (jrp_realm = json_object_get(jresp, "rp_realm"))) ||
347 (!json_is_string(jrp_realm)) ||
348 (NULL == (jrealm = json_object_get(jresp, "target_realm"))) ||
349 (!json_is_string(jrealm)) ||
350 (NULL == (jcomm = json_object_get(jresp, "comm"))) ||
351 (!json_is_string(jcomm))) {
352 fprintf (stderr, "tr_msg_decode_tidresp(): Error parsing response.\n");
357 if (0 == (strcmp(json_string_value(jresult), "success"))) {
358 fprintf(stderr, "tr_msg_decode_tidresp(): Success! result = %s.\n", json_string_value(jresult));
359 if ((NULL != (jservers = json_object_get(jresp, "servers"))) ||
360 (!json_is_array(jservers))) {
361 tresp->servers = tr_msg_decode_servers(jservers);
366 tresp->result = TID_SUCCESS;
369 tresp->result = TID_ERROR;
370 fprintf(stderr, "tr_msg_decode_tidresp(): Error! result = %s.\n", json_string_value(jresult));
371 if ((NULL != (jerr_msg = json_object_get(jresp, "err_msg"))) ||
372 (!json_is_string(jerr_msg))) {
373 tresp->err_msg = tr_new_name((char *)json_string_value(jerr_msg));
377 tresp->rp_realm = tr_new_name((char *)json_string_value(jrp_realm));
378 tresp->realm = tr_new_name((char *)json_string_value(jrealm));
379 tresp->comm = tr_new_name((char *)json_string_value(jcomm));
381 /* store optional "orig_coi" field */
382 if ((NULL != (jorig_coi = json_object_get(jresp, "orig_coi"))) &&
383 (!json_is_object(jorig_coi))) {
384 tresp->orig_coi = tr_new_name((char *)json_string_value(jorig_coi));
390 char *tr_msg_encode(TR_MSG *msg)
395 /* TBD -- add error handling */
396 jmsg = json_object();
398 switch (msg->msg_type)
401 jmsg_type = json_string("tid_request");
402 json_object_set_new(jmsg, "msg_type", jmsg_type);
403 json_object_set_new(jmsg, "msg_body", tr_msg_encode_tidreq(msg->tid_req));
407 jmsg_type = json_string("tid_response");
408 json_object_set_new(jmsg, "msg_type", jmsg_type);
409 json_object_set_new(jmsg, "msg_body", tr_msg_encode_tidresp(msg->tid_resp));
412 /* TBD -- Add TR message types */
419 return(json_dumps(jmsg, 0));
422 TR_MSG *tr_msg_decode(char *jbuf, size_t buflen)
429 const char *mtype = NULL;
431 if (NULL == (jmsg = json_loadb(jbuf, buflen, JSON_DISABLE_EOF_CHECK, &rc))) {
432 fprintf (stderr, "tr_msg_decode(): error loading object\n");
436 if (!(msg = malloc(sizeof(TR_MSG)))) {
437 fprintf (stderr, "tr_msg_decode(): Error allocating TR_MSG structure.\n");
442 memset(msg, 0, sizeof(TR_MSG));
444 if ((NULL == (jtype = json_object_get(jmsg, "msg_type"))) ||
445 (NULL == (jbody = json_object_get(jmsg, "msg_body")))) {
446 fprintf (stderr, "tr_msg_decode(): Error parsing message header.\n");
448 tr_msg_free_decoded(msg);
452 mtype = json_string_value(jtype);
454 if (0 == strcmp(mtype, "tid_request")) {
455 msg->msg_type = TID_REQUEST;
456 msg->tid_req = tr_msg_decode_tidreq(jbody);
458 else if (0 == strcmp(mtype, "tid_response")) {
459 msg->msg_type = TID_RESPONSE;
460 msg->tid_resp = tr_msg_decode_tidresp(jbody);
463 msg->msg_type = TR_UNKNOWN;
469 void tr_msg_free_encoded(char *jmsg)
475 void tr_msg_free_decoded(TR_MSG *msg)