Initial import of isakmpd, an IKE (ISAKMP/Oakley) implementation for the

OpenBSD IPSEC stack by me, Niklas Hallqvist and Niels Provos, funded by
Ericsson Radio Systems.  It is not yet complete or usable in a real scenario
but the missing pieces will soon be there.  The early commit is for people
who wants early access and who are not afraid of looking at source.
isakmpd interops with Cisco, Timestep, SSH & Pluto (Linux FreeS/WAN) so
far, so it is not that incomplete.  It is really mostly configuration that
is lacking.

1 files changed, 307 insertions, 0 deletions

diff --git a/sbin/isakmpd/ui.c b/sbin/isakmpd/ui.c
new file mode 100644
index 00000000000..f86fd0c5c65
--- /dev/null
+++ b/sbin/isakmpd/ui.c
@@ -0,0 +1,307 @@
+/*	$Id: ui.c,v 1.1 1998/11/15 00:03:49 niklas Exp $	*/
+
+/*
+ * Copyright (c) 1998 Niklas Hallqvist.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ericsson Radio Systems.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This code was written under funding by Ericsson Radio Systems.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define BUF_SZ 256
+
+#include "doi.h"
+#include "exchange.h"
+#include "isakmp.h"
+#include "log.h"
+#include "sa.h"
+#include "transport.h"
+#include "ui.h"
+#include "util.h"
+
+char *ui_fifo = FIFO;
+int ui_socket;
+
+/* Create and open the FIFO used for user control.  */
+void
+ui_init ()
+{
+  /* -f- means control messages comes in via stdin.  */
+  if (strcmp (ui_fifo, "-") == 0)
+    ui_socket = 0;
+  else
+    {
+      /* No need to know about errors.  */
+      unlink (ui_fifo);
+      if (mkfifo (ui_fifo, 0600) == -1)
+	log_fatal ("mkfifo");
+
+      /* XXX Is O_RDWR needed on some OSes?  Photurisd seems to imply that.  */
+      ui_socket = open (ui_fifo, O_RDONLY | O_NONBLOCK, 0);
+      if (ui_socket == -1)
+	log_fatal (ui_fifo);
+    }
+}
+
+/* Parse the connect command found in CMD.  */
+static void
+ui_connect (char *cmd)
+{
+  char trpt[11];
+  char addr[81];
+  struct transport *transport = 0;
+  int exchange, doi;
+  struct sa *isakmp_sa = 0;
+  u_int8_t cookies[ISAKMP_HDR_COOKIES_LEN];
+
+  if (sscanf (cmd, "c %10s %80s %d %d", trpt, addr, &exchange, &doi) != 4)
+    {
+      log_print ("ui_connect: command \"%s\" malformed", cmd);
+      return;
+    }
+
+  if (strcasecmp (trpt, "isakmp") == 0)
+    {
+      if (hex2raw (addr, cookies, ISAKMP_HDR_COOKIES_LEN) == -1)
+	{
+	  log_print ("ui_connect: cookiepair \"%s\" malformed", addr);
+	  return;
+	}
+      isakmp_sa = sa_lookup (cookies, 0);
+      if (!isakmp_sa)
+	{
+	  log_print ("ui_connect: transport \"%s %s\" could not be found",
+		     trpt, addr);
+	  return;
+	}
+
+      /* XXX Fill in the args argument.  */
+      exchange_establish_p2 (isakmp_sa, exchange, 0);
+    }
+  else
+    {
+      transport = transport_create (trpt, addr);
+      if (!transport)
+	{
+	  log_print ("ui_connect: transport \"%s %s\" could not be created",
+		     trpt, addr);
+	  return;
+	}
+
+      /* XXX This validity check seems to be a bit dumb.  */
+#if 0
+      /* Only ISAKMP exchange types can be given.  */
+      if (exchange < ISAKMP_EXCH_BASE || exchange >= ISAKMP_EXCH_FUTURE_MIN)
+	{
+	  log_print ("exchange %d is not valid", exchange);
+	  return;
+	}
+#endif
+
+      /* Only valid DOIs can be given.  XXX Uninteresting for phase 2.  */
+      if (!doi_lookup (doi))
+	{
+	  log_print ("DOI %d is not valid", doi);
+	  return;
+	}
+
+      /* XXX Fill in the args argument.  */
+      exchange_establish_p1 (transport, exchange, doi, 0);
+    }
+}
+
+static void
+ui_delete (char *cmd)
+{
+  char cookies_str[ISAKMP_HDR_COOKIES_LEN * 2 + 1];
+  char message_id_str[ISAKMP_HDR_MESSAGE_ID_LEN * 2 + 1];
+  u_int8_t cookies[ISAKMP_HDR_COOKIES_LEN];
+  u_int8_t message_id_buf[ISAKMP_HDR_MESSAGE_ID_LEN];
+  u_int8_t *message_id = message_id_buf;
+  struct sa *sa;
+
+  if (sscanf (cmd, "d %32s %8s", cookies_str, message_id_str) != 2)
+    {
+      log_print ("ui_delete: command \"%s\" malformed", cmd);
+      return;
+    }
+  
+  if (strcmp (message_id_str, "-") == 0)
+    message_id = 0;
+
+  if (hex2raw (cookies_str, cookies, ISAKMP_HDR_COOKIES_LEN) == -1
+      || (message_id && hex2raw (message_id_str, message_id_buf,
+				 ISAKMP_HDR_MESSAGE_ID_LEN) == -1))
+    {
+      log_print ("ui_delete: command \"%s\" has bad arguments", cmd);
+      return;
+    }
+
+  sa = sa_lookup (cookies, message_id);
+  if (!sa)
+    {
+      log_print ("ui_delete: command \"%s\" found no SA", cmd);
+      return;
+    }
+  sa_delete (sa, 1);
+}
+
+/* Parse the debug command found in CMD.  */
+static void
+ui_debug (char *cmd)
+{
+  int cls, level;
+
+  if (sscanf (cmd, "d %d %d", &cls, &level) != 2)
+    {
+      log_print ("ui_debug: command \"%s\" malformed", cmd);
+      return;
+    }
+  log_debug_cmd (cls, level);
+}
+
+/* Report SAs and ongoing exchanges.  */
+static void
+ui_report (char *cmd)
+{
+  sa_report ();
+  exchange_report ();
+}
+
+/*
+ * Call the relevant command handler based on the first character of the
+ * line (the command).
+ */
+static void
+ui_handle_command (char *line)
+{
+  /* Find out what one-letter command was sent.  */
+  switch (line[0])
+    {
+    case 'c':
+      ui_connect (line);
+      break;
+
+    case 'd':
+      ui_delete (line);
+      break;
+
+    case 'D':
+      ui_debug (line);
+      break;
+
+    case 'r':
+      ui_report (line);
+      break;
+
+    default:
+      log_print ("ui_handle_messages: unrecognized command: '%c'", line[0]);
+    }
+}
+
+/*
+ * A half-complex implementation of reading from a file descriptor
+ * line by line without resorting to stdio which apparently have
+ * troubles with non-blocking fifos.
+ */
+void
+ui_handler ()
+{
+  static char *buf = 0;
+  static char *p;
+  static size_t sz;
+  static size_t resid;
+  size_t n;
+  char *new_buf;
+
+  /* If no buffer, set it up.  */
+  if (!buf)
+    {
+      sz = BUF_SZ;
+      buf = malloc (sz);
+      if (!buf)
+	{
+	  log_print ("malloc (%d) failed", sz);
+	  return;
+	}
+      p = buf;
+      resid = sz;
+    }
+
+  /* If no place left in the buffer reallocate twice as large.  */
+  if (!resid)
+    {
+      new_buf = realloc (buf, sz * 2);
+      if (!new_buf)
+	{
+	  log_print ("realloc (%p, %d) failed", buf, sz * 2);
+	  free (buf);
+	  buf = 0;
+	  return;
+	}
+      buf = new_buf;
+      p = buf + sz;
+      resid = sz;
+      sz *= 2;
+    }
+
+  n = read (ui_socket, p, resid);
+  if (n == -1)
+    {
+      log_error ("read (%d, %p, %d)", ui_socket, p, resid);
+      return;
+    }
+
+  if (!n)
+    return;
+  resid -= n;
+  while (n--)
+    {
+      /*
+       * When we find a newline, cut off the line and feed it to the
+       * command processor.  Then move the rest up-front.
+       */
+      if (*p == '\n')
+	{
+	  *p = '\0';
+	  ui_handle_command (buf);
+	  memcpy (buf, p + 1, n);
+	  p = buf;
+	  resid = sz - n;
+	  continue;
+	}
+      p++;
+    }
+}