/*
- * Copyright (c) 2012, JANET(UK)
+ * Copyright (c) 2012, 2014-2015, JANET(UK)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
*/
#include <stdio.h>
-#include <stdlib.h>
#include <jansson.h>
+#include <talloc.h>
#include <gsscon.h>
-#include <tr_dh.h>
-#include <trust_router/tid.h>
+#include <trust_router/tr_dh.h>
+#include <tid_internal.h>
#include <tr_msg.h>
-#include <gsscon.h>
+#include <tr_debug.h>
+#include <tr_rand_id.h>
-/* char tmp_key[32] =
- {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
- 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
- 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
- 0x19, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F};
-*/
int tmp_len = 32;
-TIDC_INSTANCE *tidc_create ()
+/* creates struct in talloc null context */
+TIDC_INSTANCE *tidc_create(void)
{
- TIDC_INSTANCE *tidc = NULL;
-
- if (tidc = malloc(sizeof(TIDC_INSTANCE)))
- memset(tidc, 0, sizeof(TIDC_INSTANCE));
- else
- return NULL;
-
- if (NULL == (tidc->priv_dh = tr_create_dh_params(NULL, 0))) {
- free (tidc);
- return NULL;
+ TIDC_INSTANCE *tidc=talloc(NULL, TIDC_INSTANCE);
+ if (tidc!=NULL) {
+ tidc->gssc = tr_gssc_instance_new(tidc);
+ if (tidc->gssc == NULL) {
+ talloc_free(tidc);
+ return NULL;
+ }
+
+ tidc->gssc->service_name = "trustidentity";
}
-
- fprintf(stderr, "TIDC DH Parameters:\n");
- DHparams_print_fp(stdout, tidc->priv_dh);
- fprintf(stderr, "\n");
-
return tidc;
}
-void tidc_destroy (TIDC_INSTANCE *tidc)
+void tidc_destroy(TIDC_INSTANCE *tidc)
{
- if (tidc)
- free(tidc);
+ talloc_free(tidc);
}
int tidc_open_connection (TIDC_INSTANCE *tidc,
- char *server,
- gss_ctx_id_t *gssctx)
+ const char *server,
+ unsigned int port,
+ gss_ctx_id_t *gssctx)
{
- int err = 0;
- int conn = -1;
-
- err = gsscon_connect(server, TID_PORT, &conn);
+ unsigned int use_port = 0;
+ tidc->gssc->gss_ctx = gssctx;
- if (!err)
- err = gsscon_active_authenticate(conn, NULL, "trustidentity", gssctx);
+ if (0 == port)
+ use_port = TID_PORT;
+ else
+ use_port = port;
- if (!err)
- return conn;
+ tr_debug("tidc_open_connection: opening tidc connection to %s:%d", server, use_port);
+ if (0 == tr_gssc_open_connection(tidc->gssc, server, use_port))
+ return tidc->gssc->conn;
else
return -1;
}
-int tidc_send_request (TIDC_INSTANCE *tidc,
- int conn,
- gss_ctx_id_t gssctx,
- char *rp_realm,
- char *realm,
- char *comm,
- TIDC_RESP_FUNC *resp_handler,
- void *cookie)
-
+int tidc_send_request (TIDC_INSTANCE *tidc,
+ int conn,
+ gss_ctx_id_t gssctx,
+ const char *rp_realm,
+ const char *realm,
+ const char *comm,
+ TIDC_RESP_FUNC *resp_handler,
+ void *cookie)
{
- int err = 0;
- char *req_buf = NULL;
- char *resp_buf = NULL;
- size_t resp_buflen = 0;
- TR_MSG *msg = NULL;
TID_REQ *tid_req = NULL;
- TR_MSG *resp_msg = NULL;
- int c_keylen = 0;
- unsigned char *c_keybuf = NULL;
- int i;
-
- /* Create and populate a TID msg structure */
- if ((!(msg = malloc(sizeof(TR_MSG)))) ||
- (!(tid_req = malloc(sizeof(TID_REQ)))))
- return -1;
-
- memset(tid_req, 0, sizeof(tid_req));
-
- msg->msg_type = TID_REQUEST;
+ char *request_id = NULL;
+ int rc;
+ int orig_conn = 0;
+ gss_ctx_id_t *orig_gss_ctx = NULL;
+
+ /* For ABI compatibility, replace the generic GSS client parameters
+ * with the arguments we were passed. */
+ orig_conn = tidc->gssc->conn; /* save to restore later */
+ if (conn != tidc->gssc->conn) {
+ tr_warning("tidc_send_request: WARNING: socket connection FD does not match FD opened by tidc_open_connection()");
+ tidc->gssc->conn = conn;
+ }
+ orig_gss_ctx = tidc->gssc->gss_ctx; /* save to restore later */
+ if (gssctx != *(tidc->gssc->gss_ctx)) {
+ tr_warning("tidc_send_request: WARNING: sending request with different GSS context than used for tidc_open_connection()");
+ *tidc->gssc->gss_ctx = gssctx;
+ }
- msg->tid_req = tid_req;
+ /* Create and populate a TID req structure */
+ if (!(tid_req = tid_req_new()))
+ goto error;
tid_req->conn = conn;
+ tid_req->gssctx = gssctx;
- /* TBD -- error handling */
- tid_req->rp_realm = tr_new_name(rp_realm);
- tid_req->realm = tr_new_name(realm);
- tid_req->comm = tr_new_name(comm);
+ if ((NULL == (tid_req->rp_realm = tr_new_name(rp_realm))) ||
+ (NULL == (tid_req->realm = tr_new_name(realm))) ||
+ (NULL == (tid_req->comm = tr_new_name(comm)))) {
+ tr_err ( "tidc_send_request: Error duplicating names.\n");
+ goto error;
+ }
- tid_req->tidc_dh = tidc->priv_dh;
-
- tid_req->resp_func = resp_handler;
- tid_req->cookie = cookie;
+ tid_req->tidc_dh = tr_dh_dup(tidc->gssc->client_dh);
+
+ /* generate an ID */
+ request_id = tr_random_id(NULL);
+ if (request_id) {
+ if (tid_req->request_id = tr_new_name(request_id))
+ tr_debug("tidc_send_request: Created TID request ID: %s", request_id);
+ else
+ tr_debug("tidc_send_request: Unable to set request ID, proceeding without one");
+ talloc_free(request_id);
+ } else
+ tr_debug("tidc_send_request: Failed to generate a TID request ID, proceeding without one");
+
+ rc = tidc_fwd_request(tidc, tid_req, resp_handler, cookie);
+ goto cleanup;
+ error:
+ rc = -1;
+ cleanup:
+ if (tid_req)
+ tid_req_free(tid_req);
- /* Encode the request into a json string */
- if (!(req_buf = tr_msg_encode(msg))) {
- printf("Error encoding TID request.\n");
- return -1;
- }
+ tidc->gssc->conn = orig_conn;
+ tidc->gssc->gss_ctx = orig_gss_ctx;
+ return rc;
+}
- printf ("Sending TID request:\n");
- printf ("%s\n", req_buf);
+int tidc_fwd_request(TIDC_INSTANCE *tidc,
+ TID_REQ *tid_req,
+ TIDC_RESP_FUNC *resp_handler,
+ void *cookie)
+{
+ TALLOC_CTX *tmp_ctx = talloc_new(NULL);
+ TR_MSG *msg = NULL;
+ TR_MSG *resp_msg = NULL;
+ TID_RESP *tid_resp = NULL;
+ int rc = 0;
- /* Send the request over the connection */
- if (err = gsscon_write_encrypted_token (conn, gssctx, req_buf,
- strlen(req_buf))) {
- fprintf(stderr, "Error sending request over connection.\n");
- return -1;
- }
+ /* Create and populate a TID msg structure */
+ if (!(msg = talloc_zero(tmp_ctx, TR_MSG)))
+ goto error;
- /* TBD -- should queue request on instance, resps read in separate thread */
- /* Read the response from the connection */
+ msg->msg_type = TID_REQUEST;
+ tr_msg_set_req(msg, tid_req);
- if (err = gsscon_read_encrypted_token(conn, gssctx, &resp_buf, &resp_buflen)) {
- if (resp_buf)
- free(resp_buf);
- return -1;
- }
- fprintf(stdout, "Response Received (%d bytes).\n", resp_buflen);
- fprintf(stdout, "%s\n", resp_buf);
+ tr_debug( "tidc_fwd_request: Sending TID request\n");
- if (NULL == (resp_msg = tr_msg_decode(resp_buf, resp_buflen))) {
- fprintf(stderr, "Error decoding response.\n");
- return -1;
- }
+ /* Send the request over the connection */
+ resp_msg = tr_gssc_exchange_msgs(tmp_ctx, tidc->gssc, msg);
+ if (resp_msg == NULL)
+ goto error;
/* TBD -- Check if this is actually a valid response */
- if (!resp_msg->tid_resp) {
- fprintf(stderr, "Error: No response in the response!\n");
- return -1;
+ tid_resp = tr_msg_get_resp(resp_msg);
+ if (tid_resp == NULL) {
+ tr_err( "tidc_fwd_request: Error, no response in the response!\n");
+ goto error;
}
-
- /* Call the caller's response function */
- (*tid_req->resp_func)(tidc, tid_req, resp_msg->tid_resp, cookie);
-
- /* Generate the client key -- TBD, handle more than one server */
- if (TID_SUCCESS != resp_msg->tid_resp->result) {
- fprintf(stderr, "Response is an error.\n");
- return -1;
+ /* Check whether the request IDs matched and warn if not. Do nothing if we don't get
+ * an ID on the return - it is not mandatory to preserve that field. */
+ if (tid_req->request_id) {
+ if ((tid_resp->request_id)
+ && (tr_name_cmp(tid_resp->request_id, tid_req->request_id) != 0)) {
+ /* Requests present but do not match */
+ tr_warning("tidc_fwd_request: Sent request ID %.*s, received response for %.*s",
+ tid_req->request_id->len, tid_req->request_id->buf,
+ tid_resp->request_id->len, tid_resp->request_id->buf);
+ }
+ } else if (tid_resp->request_id) {
+ tr_warning("tidc_fwd_request: Sent request without ID, received response for %.*s",
+ tid_resp->request_id->len, tid_resp->request_id->buf);
}
- if (!resp_msg->tid_resp->servers) {
- fprintf(stderr, "Response does not contain server info.\n");
- return -1;
+ if (resp_handler) {
+ /* Call the caller's response function. It must copy any data it needs before returning. */
+ tr_debug("tidc_fwd_request: calling response callback function.");
+ (*resp_handler)(tidc, tid_req, tr_msg_get_resp(resp_msg), cookie);
}
-
- if (NULL == (c_keybuf = malloc(DH_size(tid_req->tidc_dh)))) {
- fprintf (stderr, "Error: Can't allocate client keybuf, exiting.\n");
- return -1;
- }
- if (0 > (c_keylen = tr_compute_dh_key(c_keybuf,
- DH_size(tid_req->tidc_dh),
- resp_msg->tid_resp->servers->aaa_server_dh->pub_key,
- tid_req->tidc_dh))) {
-
- printf("Error computing client key.\n");
- return -1;
- }
-
- /* Print out the client key. */
- printf("Client Key Generated (len = %d):\n", c_keylen);
- for (i = 0; i < c_keylen; i++) {
- printf("%x", c_keybuf[i]);
- }
- printf("\n");
-
- if (msg)
- free(msg);
- if (tid_req)
- free(tid_req);
- if (req_buf)
- free(req_buf);
- if (resp_buf)
- free(resp_buf);
- /* TBD -- free the decoded response */
+ goto cleanup;
- return 0;
+ error:
+ rc = -1;
+ cleanup:
+ talloc_free(tmp_ctx);
+ return rc;
}
+DH * tidc_get_dh(TIDC_INSTANCE *inst)
+{
+ return tr_gssc_get_dh(inst->gssc);
+}
-
-
+DH *tidc_set_dh(TIDC_INSTANCE *inst, DH *dh)
+{
+ return tr_gssc_set_dh(inst->gssc, dh);
+}
projects / trust_router.git / blobdiff