Add inital DH common code, and call from TPQ client.

[trust_router.git] / tpq / tpqc.c

diff --git a/tpq/tpqc.c b/tpq/tpqc.c
index 8fbdacd..74cdcff 100644 (file)
--- a/tpq/tpqc.c
+++ b/tpq/tpqc.c
@@ -32,15 +32,42 @@
  *
  */
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <jansson.h>
+
 #include <gsscon.h>
+#include <tr_dh.h>
 #include <tpq.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;
+
 TPQC_INSTANCE *tpqc_create ()
 {
   TPQC_INSTANCE *tpqc = NULL;
 
-  if (tpqc = malloc(sizeof(TPQC_INSTANCE)))
+  if (tpqc = malloc(sizeof(TPQC_INSTANCE))) 
     memset(tpqc, 0, sizeof(TPQC_INSTANCE));
+  else
+    return NULL;
+
+  /* TBD -- Generate random private key */
+  tpqc->priv_key = tmp_key;
+  tpqc->priv_len = tmp_len;
+
+  if (NULL == (tpqc->priv_dh = tr_create_dh_params(tpqc->priv_key, tpqc->priv_len))) {
+    free (tpqc);
+    return NULL;
+  }
+
+  fprintf(stderr, "TPQC DH Parameters:\n");
+  DHparams_print_fp(stdout, tpqc->priv_dh);
+  fprintf(stderr, "\n");
 
   return tpqc;
 }
@@ -51,19 +78,102 @@ void tpqc_destroy (TPQC_INSTANCE *tpqc)
     free(tpqc);
 }
 
-int tpqc_open_connection (TPQC_INSTANCE *tpqc, char *server)
+int tpqc_open_connection (TPQC_INSTANCE *tpqc, 
+                         char *server,
+                         gss_ctx_id_t *gssctx)
 {
+  int err = 0;
+  int conn = -1;
+
+  err = gsscon_connect(server, TPQ_PORT, &conn);
 
+  if (!err)
+    err = gsscon_active_authenticate(conn, NULL, "trustquery", gssctx);
+
+  if (!err)
+    return conn;
+  else
+    return -1;
 }
 
 int tpqc_send_request (TPQC_INSTANCE *tpqc, 
                       int conn, 
+                      gss_ctx_id_t gssctx,
                       char *realm, 
                       char *coi,
-                      TPQC_RESP_FUNC *resp_handler)
+                      TPQC_RESP_FUNC *resp_handler,
+                      void *cookie)
 
 {
+  json_t *jreq;
+  int err;
+  char *req_buf;
+  char *resp_buf;
+  size_t resp_buflen = 0;
+
+  /* Create a json TPQ request */
+  if (NULL == (jreq = json_object())) {
+    fprintf(stderr,"Error creating json object.\n");
+    return -1;
+  }
+
+  if (0 > (err = json_object_set_new(jreq, "type", json_string("tpq_request")))) {
+    fprintf(stderr, "Error adding type to request.\n");
+    return -1;
+  }
+
+  /* Insert realm and coi into the json request */
+  if (0 > (err = json_object_set_new(jreq, "realm", json_string(realm)))) {
+    fprintf(stderr, "Error adding realm to request.\n");
+    return -1;
+  }
+  if (0 > (err = json_object_set_new(jreq, "coi", json_string(coi)))) {
+    fprintf(stderr, "Error adding coi to request.\n");
+    return -1;
+  }
+
+  /* Generate half of a D-H exchange -- TBD */
+  /* Insert D-H information into the request -- TBD */
 
+  /* Encode the json request */
+  if (NULL == (req_buf = json_dumps(jreq, 0))) {
+    fprintf(stderr, "Error encoding json request.\n");
+    return -1;
+  }
+  
+  printf("Encoded request:\n%s\n", req_buf);
+  
+  /* Send the request over the connection */
+  if (err = gsscon_write_encrypted_token (conn, gssctx, req_buf, 
+                                         strlen(req_buf) + 1)) {
+    fprintf(stderr, "Error sending request over connection.\n");
+    return -1;
+  }
+
+  free(req_buf);
+
+  /* read the response from the connection */
+
+  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);
+
+  /* Parse response -- TBD */
+
+  /* Call the caller's response function */
+  (*resp_handler)(tpqc, NULL, cookie);
+
+  if (resp_buf)
+    free(resp_buf);
+
+  return 0;
 }
 
 
+
+
+