Import iked, a new implementation of the IKEv2 protocol.

iked(8) is an automatic keying daemon for IPsec, like isakmpd(8), that
IPsec creates flows and SAs automatically.  Unlike isakmpd, iked(8)
implements the newer IKEv2 protocol instead of IKEv1/ISAKMP.  The
daemon is still work-in-progress and not enabled in the builds, but is
already able to establish IKEv2 sessions with some other IKEv2
implementations as a responder.

with lots of help and debugging by jsg@
ok deraadt@

1 files changed, 183 insertions, 0 deletions

diff --git a/sbin/iked/ikev1.c b/sbin/iked/ikev1.c
new file mode 100644
index 00000000000..ba4c4523a58
--- /dev/null
+++ b/sbin/iked/ikev1.c
@@ -0,0 +1,183 @@
+/*	$OpenBSD: ikev1.c,v 1.1 2010/06/03 16:41:12 reyk Exp $	*/
+/*	$vantronix: ikev1.c,v 1.13 2010/05/28 15:34:35 reyk Exp $	*/
+
+/*
+ * Copyright (c) 2010 Reyk Floeter <reyk@vantronix.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * XXX Either implement IKEv1,
+ * XXX or find a way to pass IKEv1 messages to isakmpd,
+ * XXX or remove this file and ikev1 from the iked tree.
+ */
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <sys/uio.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <getopt.h>
+#include <signal.h>
+#include <errno.h>
+#include <err.h>
+#include <pwd.h>
+#include <event.h>
+
+#include "iked.h"
+#include "ikev2.h"
+
+int	 ikev1_dispatch_parent(int, struct iked_proc *, struct imsg *);
+int	 ikev1_dispatch_ikev2(int, struct iked_proc *, struct imsg *);
+
+void	 ikev1_message_cb(int, short, void *);
+void	 ikev1_message_recv(struct iked *, struct iked_message *);
+
+static struct iked_proc procs[] = {
+	{ "parent",	PROC_PARENT,	ikev1_dispatch_parent },
+	{ "ikev2",	PROC_IKEV2,	ikev1_dispatch_ikev2 }
+};
+
+pid_t
+ikev1(struct iked *env, struct iked_proc *p)
+{
+	return (run_proc(env, p, procs, nitems(procs), NULL, NULL));
+}
+
+int
+ikev1_dispatch_parent(int fd, struct iked_proc *p, struct imsg *imsg)
+{
+	struct iked		*env = p->env;
+
+	switch (imsg->hdr.type) {
+	case IMSG_CTL_RESET:
+		log_debug("%s: config reload", __func__);
+		return (0);
+	case IMSG_UDP_SOCKET:
+		return (config_getsocket(env, imsg, ikev1_message_cb));
+	default:
+		break;
+	}
+
+	return (-1);
+}
+
+int
+ikev1_dispatch_ikev2(int fd, struct iked_proc *p, struct imsg *imsg)
+{
+	struct iked		*env = p->env;
+	struct iked_message	 msg;
+	u_int8_t		*buf;
+	ssize_t			 len;
+
+	switch (imsg->hdr.type) {
+	case IMSG_IKE_MESSAGE:
+		log_debug("%s: message", __func__);
+		IMSG_SIZE_CHECK(imsg, &msg);
+		memcpy(&msg, imsg->data, sizeof(msg));
+
+		len = IMSG_DATA_SIZE(imsg) - sizeof(msg);
+		buf = (u_int8_t *)imsg->data + sizeof(msg);
+		if (len <= 0 || (msg.msg_data = ibuf_new(buf, len)) == NULL) {
+			log_debug("%s: short message", __func__);
+			return (0);
+		}
+
+		log_debug("%s: message length %d", __func__, len);
+
+		ikev1_message_recv(env, &msg);
+		message_cleanup(env, &msg);
+		return (0);
+	default:
+		break;
+	}
+
+	return (-1);
+}
+
+void
+ikev1_message_cb(int fd, short event, void *arg)
+{
+	struct iked_socket	*sock = arg;
+	struct iked		*env = sock->sock_env;
+	struct iked_message	 msg;
+	struct ike_header	 hdr;
+	u_int8_t		 buf[IKED_MSGBUF_MAX];
+	size_t			 len;
+	struct iovec		 iov[2];
+
+	msg.msg_peerlen = sizeof(msg.msg_peer);
+	msg.msg_locallen = sizeof(msg.msg_local);
+
+	if ((len = recvfromto(fd, buf, sizeof(buf), 0,
+	    (struct sockaddr*)&msg.msg_peer, &msg.msg_peerlen,
+	    (struct sockaddr*)&msg.msg_local, &msg.msg_locallen)) < 1)
+		return;
+
+	if ((size_t)len <= sizeof(hdr))
+		return;
+	memcpy(&hdr, buf, sizeof(hdr));
+
+	if ((msg.msg_data = ibuf_new(buf, len)) == NULL)
+		return;
+
+	if (hdr.ike_version == IKEV2_VERSION) {
+		iov[0].iov_base = &msg;
+		iov[0].iov_len = sizeof(msg);
+		iov[1].iov_base = buf;
+		iov[1].iov_len = len;
+
+		imsg_composev_proc(env, PROC_IKEV2, IMSG_IKE_MESSAGE, -1,
+		    iov, 2);
+		goto done;
+	}
+
+	ikev1_message_recv(env, &msg);
+
+ done:
+	message_cleanup(env, &msg);
+}
+
+void
+ikev1_message_recv(struct iked *env, struct iked_message *msg)
+{
+	struct ike_header	*hdr;
+
+	if (ibuf_size(msg->msg_data) <= sizeof(*hdr)) {
+		log_debug("%s: short message", __func__);
+		return;
+	}
+
+	hdr = (struct ike_header *)ibuf_data(msg->msg_data);
+
+	log_debug("%s: header ispi %s rspi %s"
+	    " nextpayload %u version 0x%02x exchange %u flags 0x%02x"
+	    " msgid %u length %u", __func__,
+	    print_spi(betoh64(hdr->ike_ispi), 8),
+	    print_spi(betoh64(hdr->ike_rspi), 8),
+	    hdr->ike_nextpayload,
+	    hdr->ike_version,
+	    hdr->ike_exchange,
+	    hdr->ike_flags,
+	    betoh32(hdr->ike_msgid),
+	    betoh32(hdr->ike_length));
+
+	log_debug("%s: IKEv1 not supported", __func__);
+}