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, 155 insertions, 0 deletions

diff --git a/sbin/isakmpd/asn.h b/sbin/isakmpd/asn.h
new file mode 100644
index 00000000000..9a0e55f8936
--- /dev/null
+++ b/sbin/isakmpd/asn.h
@@ -0,0 +1,155 @@
+/*	$Id: asn.h,v 1.1 1998/11/15 00:03:48 niklas Exp $	*/
+
+/*
+ * Copyright (c) 1998 Niels Provos.  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.
+ */
+
+#ifndef _ASN_H_
+#define _ASN_H_
+
+/* Very very simple module for compiling ASN.1 BER encoding */
+
+enum asn_classes {
+  UNIVERSAL = 0,
+  APPLICATION = 1,
+  CONTEXT = 2,
+  PRIVATE = 3
+};
+
+#define TAG_EXPLICIT	4
+#define TAG_EXPSHIFTS	5
+
+#define ISEXPLICIT(x) ((x)->class & TAG_EXPLICIT)
+#define ADD_EXP(x,y)	((x << TAG_EXPSHIFTS) | TAG_EXPLICIT | (y))
+#define GET_EXP(x)	((x)->class >>  TAG_EXPSHIFTS)
+
+enum asn_tags {
+  TAG_BOOL = 1,
+  TAG_INTEGER = 2,
+  TAG_BITSTRING = 3,
+  TAG_OCTETSTRING = 4,
+  TAG_NULL = 5,
+  TAG_OBJECTID = 6,		/* Internal Representation as ASCII String */
+  TAG_SEQUENCE = 16,
+  TAG_SET = 17,
+  TAG_PRINTSTRING = 19,
+  TAG_UTCTIME = 23,		/* Represenation as ASCII String */
+  TAG_STOP = -1,       		/* None official ASN tag, indicates end */
+  TAG_RAW = -2,			/* Placeholder for something we cant handle */
+  TAG_ANY = -3,			/* Either we can handle it or it is RAW */
+};
+
+struct norm_type {
+  enum asn_tags type;
+  enum asn_classes class;
+  const char *name;
+  u_int32_t len;
+  void *data;
+  u_int32_t flags;
+};
+
+struct asn_objectid {
+  char *name;
+  char *objectid;
+};
+
+struct asn_handler {
+  enum asn_tags type;
+  void (*free) (struct norm_type *);
+  u_int32_t (*get_encoded_len) (struct norm_type *, u_int8_t *type);
+  u_int8_t *(*decode) (u_int8_t *, u_int32_t, struct norm_type *);
+  u_int8_t *(*encode) (struct norm_type *, u_int8_t *);
+};
+
+#define ASN_FLAG_ZEROORMORE	0x0001
+
+/* Construct a Sequence */
+#define SEQ(x,y) {TAG_SEQUENCE, UNIVERSAL, x, 0, y}
+#define SEQOF(x,y) {TAG_SEQUENCE, UNIVERSAL, x, 0, y, ASN_FLAG_ZEROORMORE}
+#define SET(x,y) {TAG_SET, UNIVERSAL, x, 0, y}
+#define SETOF(x,y) {TAG_SET, UNIVERSAL, x, 0, y, ASN_FLAG_ZEROORMORE}
+
+#define TAG_TYPE(x) ((enum asn_tags)((x)[0] & 0x1f))
+
+/* Tag modifiers */
+#define ASN_CONSTRUCTED	0x20	/* Constructed object type */
+
+/* Length modifiers */
+#define ASN_LONG_FORM  	0x80	/* Number of length octets */
+
+/* Function prototypes */
+
+u_int8_t *asn_encode_integer (struct norm_type *, u_int8_t *);
+u_int8_t *asn_decode_integer (u_int8_t *, u_int32_t, struct norm_type *);
+u_int32_t asn_get_encoded_len_integer (struct norm_type *, u_int8_t *);
+void asn_free_integer (struct norm_type *);
+
+u_int8_t *asn_encode_string (struct norm_type *, u_int8_t *);
+u_int8_t *asn_decode_string (u_int8_t *, u_int32_t, struct norm_type *);
+u_int32_t asn_get_encoded_len_string (struct norm_type *, u_int8_t *);
+void asn_free_string (struct norm_type *);
+
+u_int8_t *asn_encode_objectid (struct norm_type *, u_int8_t *);
+u_int8_t *asn_decode_objectid (u_int8_t *, u_int32_t, struct norm_type *);
+u_int32_t asn_get_encoded_len_objectid (struct norm_type *, u_int8_t *);
+void asn_free_objectid (struct norm_type *);
+
+u_int8_t *asn_encode_raw (struct norm_type *, u_int8_t *);
+u_int8_t *asn_decode_raw (u_int8_t *, u_int32_t, struct norm_type *);
+u_int32_t asn_get_encoded_len_raw (struct norm_type *, u_int8_t *);
+void asn_free_raw (struct norm_type *);
+
+u_int8_t *asn_encode_null (struct norm_type *, u_int8_t *);
+u_int8_t *asn_decode_null (u_int8_t *, u_int32_t, struct norm_type *);
+u_int32_t asn_get_encoded_len_null (struct norm_type *, u_int8_t *);
+void asn_free_null (struct norm_type *);
+
+u_int8_t *asn_encode_sequence (struct norm_type *, u_int8_t *);
+u_int8_t *asn_decode_sequence (u_int8_t *, u_int32_t, struct norm_type *);
+u_int32_t asn_get_encoded_len_sequence (struct norm_type *, u_int8_t *);
+void asn_free_sequence (struct norm_type *);
+
+u_int8_t *asn_decode_any (u_int8_t *, u_int32_t, struct norm_type *);
+
+void asn_free (struct norm_type *);
+
+int asn_get_from_file (char *, u_int8_t **, u_int32_t *);
+struct norm_type *asn_template_clone (struct norm_type *, int);
+
+u_int32_t asn_sizeinoctets (u_int32_t);
+u_int32_t asn_get_len (u_int8_t *);
+u_int32_t asn_get_data_len (struct norm_type *, u_int8_t **, u_int8_t **);
+u_int32_t asn_get_encoded_len (struct norm_type *, u_int32_t, u_int8_t *);
+
+char *asn_parse_objectid (struct asn_objectid *, char *);
+struct norm_type *asn_decompose (char *, struct norm_type *);
+#endif /* _ASN_H_ */