added keyexchange

1 files changed, 252 insertions, 0 deletions

diff --git a/keyexchange/isakmpd-20041012/field.c b/keyexchange/isakmpd-20041012/field.c
new file mode 100644
index 0000000..0cc96d2
--- /dev/null
+++ b/keyexchange/isakmpd-20041012/field.c
@@ -0,0 +1,252 @@
+/* $OpenBSD: field.c,v 1.16 2004/06/14 09:55:41 ho Exp $	 */
+/* $EOM: field.c,v 1.11 2000/02/20 19:58:37 niklas Exp $	 */
+
+/*
+ * Copyright (c) 1998, 1999 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.
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "sysdep.h"
+
+#include "constants.h"
+#include "field.h"
+#include "log.h"
+#include "util.h"
+
+static char    *field_debug_raw(u_int8_t *, size_t, struct constant_map **);
+static char    *field_debug_num(u_int8_t *, size_t, struct constant_map **);
+static char    *field_debug_mask(u_int8_t *, size_t, struct constant_map **);
+static char    *field_debug_ign(u_int8_t *, size_t, struct constant_map **);
+static char    *field_debug_cst(u_int8_t *, size_t, struct constant_map **);
+
+/* Contents must match the enum in struct field.  */
+static char    *(*decode_field[]) (u_int8_t *, size_t,
+    struct constant_map **) = {
+	field_debug_raw,
+	field_debug_num,
+	field_debug_mask,
+	field_debug_ign,
+	field_debug_cst
+};
+
+/*
+ * Return a string showing the hexadecimal contents of the LEN-sized buffer
+ * BUF.  MAPS should be zero and is only here because the API requires it.
+ */
+static char *
+field_debug_raw(u_int8_t *buf, size_t len, struct constant_map **maps)
+{
+	char	*retval, *p;
+
+	if (len == 0)
+		return 0;
+	retval = malloc(3 + len * 2);
+	if (!retval)
+		return 0;
+	strlcpy(retval, "0x", 3 + len * 2);
+	p = retval + 2;
+	for (; len > 0; len--) {
+		snprintf(p, 1 + len * 2, "%02x", *buf++);
+		p += 2;
+	}
+	return retval;
+}
+
+/*
+ * Convert the unsigned LEN-sized number at BUF of network byteorder to a
+ * 32-bit unsigned integer of host byteorder pointed to by VAL.
+ */
+static int
+extract_val(u_int8_t *buf, size_t len, u_int32_t *val)
+{
+	switch (len) {
+	case 1:
+		*val = *buf;
+		break;
+	case 2:
+		*val = decode_16(buf);
+		break;
+	case 4:
+		*val = decode_32(buf);
+		break;
+	default:
+		return -1;
+	}
+	return 0;
+}
+
+/*
+ * Return a textual representation of the unsigned number pointed to by BUF
+ * which is LEN octets long.  MAPS should be zero and is only here because
+ * the API requires it.
+ */
+static char *
+field_debug_num(u_int8_t *buf, size_t len, struct constant_map **maps)
+{
+	char           *retval;
+	u_int32_t       val;
+
+	if (extract_val(buf, len, &val))
+		return 0;
+	/* 3 decimal digits are enough to represent each byte.  */
+	retval = malloc(3 * len);
+	snprintf(retval, 3 * len, "%u", val);
+	return retval;
+}
+
+/*
+ * Return the symbolic names of the flags pointed to by BUF which is LEN
+ * octets long, using the constant maps MAPS.
+ */
+static char *
+field_debug_mask(u_int8_t *buf, size_t len, struct constant_map **maps)
+{
+	u_int32_t       val;
+	u_int32_t       bit;
+	char           *retval, *new_buf, *name;
+	size_t          buf_sz;
+
+	if (extract_val(buf, len, &val))
+		return 0;
+
+	/* Size for brackets, two spaces and a NUL terminator.  */
+	buf_sz = 4;
+	retval = malloc(buf_sz);
+	if (!retval)
+		return 0;
+
+	strlcpy(retval, "[ ", buf_sz);
+	for (bit = 1; bit; bit <<= 1) {
+		if (val & bit) {
+			name = constant_name_maps(maps, bit);
+			buf_sz += strlen(name) + 1;
+			new_buf = realloc(retval, buf_sz);
+			if (!new_buf) {
+				free(retval);
+				return 0;
+			}
+			retval = new_buf;
+			strlcat(retval, name, buf_sz);
+			strlcat(retval, " ", buf_sz);
+		}
+	}
+	strlcat(retval, "]", buf_sz);
+	return retval;
+}
+
+/*
+ * Just a dummy needed to skip the unused LEN sized space at BUF.  MAPS
+ * should be zero and is only here because the API requires it.
+ */
+static char *
+field_debug_ign(u_int8_t *buf, size_t len, struct constant_map **maps)
+{
+	return 0;
+}
+
+/*
+ * Return the symbolic name of a constant pointed to by BUF which is LEN
+ * octets long, using the constant maps MAPS.
+ */
+static char *
+field_debug_cst(u_int8_t *buf, size_t len, struct constant_map **maps)
+{
+	u_int32_t       val;
+
+	if (extract_val(buf, len, &val))
+		return 0;
+
+	return strdup(constant_name_maps(maps, val));
+}
+
+/* Pretty-print a field from BUF as described by F.  */
+void
+field_dump_field(struct field *f, u_int8_t *buf)
+{
+	char	*value;
+
+	value = decode_field[(int) f->type] (buf + f->offset, f->len, f->maps);
+	if (value) {
+		LOG_DBG((LOG_MESSAGE, 70, "%s: %s", f->name, value));
+		free(value);
+	}
+}
+
+/* Pretty-print all the fields of BUF as described in FIELDS.  */
+void
+field_dump_payload(struct field *fields, u_int8_t *buf)
+{
+	struct field   *field;
+
+	for (field = fields; field->name; field++)
+		field_dump_field(field, buf);
+}
+
+/* Return the numeric value of the field F of BUF.  */
+u_int32_t
+field_get_num(struct field *f, u_int8_t *buf)
+{
+	u_int32_t       val;
+
+	if (extract_val(buf + f->offset, f->len, &val))
+		return 0;
+	return val;
+}
+
+/* Stash the number VAL into BUF's field F.  */
+void
+field_set_num(struct field *f, u_int8_t *buf, u_int32_t val)
+{
+	switch (f->len) {
+	case 1:
+		buf[f->offset] = val;
+		break;
+	case 2:
+		encode_16(buf + f->offset, val);
+		break;
+	case 4:
+		encode_32(buf + f->offset, val);
+		break;
+	}
+}
+
+/* Stash BUF's raw field F into VAL.  */
+void
+field_get_raw(struct field *f, u_int8_t *buf, u_int8_t *val)
+{
+	memcpy(val, buf + f->offset, f->len);
+}
+
+/* Stash the buffer VAL into BUF's field F.  */
+void
+field_set_raw(struct field *f, u_int8_t *buf, u_int8_t *val)
+{
+	memcpy(buf + f->offset, val, f->len);
+}