GSSAPI "house"

gssapi-client.c

//  The GSSAPI security mechanism

#include <czmq.h>
#include <zmq.h>

void zsocket_set_gssapi_client(void * zocket)
{
  int rc = zmq_setsockopt (zocket, ZMQ_GSSAPI_SERVICE_PRINCIPAL, "host", 4);
  assert (rc == 0 || zmq_errno () == ETERM);

  rc = zmq_setsockopt (zocket, ZMQ_GSSAPI_PRINCIPAL, "cbusbey", 7);
  assert (rc == 0 || zmq_errno () == ETERM);
}

int main (void)
{
  //  Create context and start authentication engine
  zctx_t *ctx = zctx_new ();
  zauth_t *auth = zauth_new (ctx);
  zauth_set_verbose (auth, true);
  zauth_allow (auth, "127.0.0.1");

  zauth_configure_gssapi (auth, "*");

  //  Create and connect client socket
  void *client = zsocket_new (ctx, ZMQ_PULL);
  zsocket_set_gssapi_client(client);
  zsocket_connect (client, "tcp://127.0.0.1:9000");

  puts ("[gss-client] waiting for msg...");
  //  Send a single message from server to client
  char *message = zstr_recv (client);
  if (message && streq (message, "Hello"))
    puts ("[gssapi-client ] GSSAPI test OK");
  else
    puts ("[gssapi-client ] GSSAPI test FAILED");

  free (message);

  zauth_destroy (&auth);
  zctx_destroy (&ctx);
  return 0;
}
~       

gssapi-server.c

//  The GSSAPI security mechanism

#include <czmq.h>

void
zsocket_set_gssapi_server(void * zocket, int gssapi_server)
{
  int rc = zmq_setsockopt (zocket, ZMQ_GSSAPI_SERVER, &gssapi_server, sizeof (int));
  assert (rc == 0 || zmq_errno () == ETERM);

  rc = zmq_setsockopt (zocket, ZMQ_GSSAPI_PRINCIPAL, "host", 4);
  assert (rc == 0 || zmq_errno () == ETERM);
}

int main (void)
{
  //  Create context and start authentication engine
  zctx_t *ctx = zctx_new ();
  zauth_t *auth = zauth_new (ctx);
  zauth_set_verbose (auth, true);
  zauth_allow (auth, "127.0.0.1");

  zauth_configure_gssapi (auth, "*");

  //  Create and bind server socket
  void *server = zsocket_new (ctx, ZMQ_PUSH);
  zsocket_set_gssapi_server (server, 1);
  zsocket_bind (server, "tcp://*:9000");

  puts ("[gss-server] sending...");
  //  Send a single message from server to client
  zstr_send (server, "Hello");

  // Give client a chance to finish
  zclock_sleep(2000);

  zauth_destroy (&auth);
  zctx_destroy (&ctx);
  return 0;
}

output

cbusbey@kerberos:~/ZmqSecurity$ kinit
cbusbey@kerberos:~/ZmqSecurity$ sudo ./gssapi-client&
cbusbey@kerberos:~/ZmqSecurity$ [gss-client] waiting for msg...
cbusbey@kerberos:~/ZmqSecurity$ sudo ./gssapi-server
[gss-server] sending...
I: PASSED (whitelist) address=127.0.0.1
I: ALLOWED (GSSAPI) principal=cbusbey@PRIVATE.CONNAMARA.COM identity=
[gssapi-client ] GSSAPI test OK