Implemented IKEv1 hash payload

src/libcharon/Makefile.am

@@ -38,6 +38,7 @@ encoding/payloads/transform_substructure.c encoding/payloads/transform_substruct
 encoding/payloads/ts_payload.c encoding/payloads/ts_payload.h \
 encoding/payloads/unknown_payload.c encoding/payloads/unknown_payload.h \
 encoding/payloads/vendor_id_payload.c encoding/payloads/vendor_id_payload.h \
+encoding/payloads/hash_payload.c encoding/payloads/hash_payload.h \
 kernel/kernel_handler.c kernel/kernel_handler.h \
 network/receiver.c network/receiver.h network/sender.c network/sender.h \
 network/packet.c network/packet.h network/socket.c network/socket.h \

src/libcharon/encoding/generator.c

@@ -452,6 +452,7 @@ METHOD(generator_t, generate_payload, void,
 			case KEY_EXCHANGE_DATA_V1:
 			case NOTIFICATION_DATA:
 			case NONCE_DATA:
+			case HASH_DATA:
 			case ID_DATA:
 			case AUTH_DATA:
 			case CERT_DATA:

src/libcharon/encoding/parser.c

@@ -534,6 +534,7 @@ METHOD(parser_t, parse_payload, status_t,
 			}
 			/* chunks */
 			case NONCE_DATA:
+			case HASH_DATA:
 			case ID_DATA:
 			case AUTH_DATA:
 			case CERT_DATA:

src/libcharon/encoding/payloads/encodings.c

@@ -49,6 +49,7 @@ ENUM(encoding_type_names, U_INT_4, ENCRYPTED_DATA,
 	"TS_TYPE",
 	"ADDRESS",
 	"NONCE_DATA",
+	"HASH_DATA",
 	"ID_DATA",
 	"AUTH_DATA",
 	"CERT_DATA",

src/libcharon/encoding/payloads/encodings.h

@@ -404,6 +404,16 @@ enum encoding_type_t {
 	 */
 	NONCE_DATA,
 
+	/**
+	 * Representating a Hash Data field.
+	 *
+	 * When generating the content of the chunkt pointing to
+	 * is written.
+	 *
+	 * When parsing (Payload Length - 4) bytes are read and written into the chunk pointing to.
+	 */
+	HASH_DATA,
+
 	/**
 	 * Representating a ID Data field.
 	 *

src/libcharon/encoding/payloads/hash_payload.c

@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include <stddef.h>
+
+#include "hash_payload.h"
+
+#include <encoding/payloads/encodings.h>
+
+typedef struct private_hash_payload_t private_hash_payload_t;
+
+/**
+ * Private data of an hash_payload_t object.
+ */
+struct private_hash_payload_t {
+
+	/**
+	 * Public hash_payload_t interface.
+	 */
+	hash_payload_t public;
+
+	/**
+	 * Next payload type.
+	 */
+	u_int8_t next_payload;
+
+	/**
+	 * Reserved byte
+	 */
+	u_int8_t reserved;
+
+	/**
+	 * Length of this payload.
+	 */
+	u_int16_t payload_length;
+
+	/**
+	 * The contained hash value.
+	 */
+	chunk_t hash;
+};
+
+/**
+ * Encoding rules for an IKEv1 hash payload
+ */
+static encoding_rule_t encodings[] = {
+	/* 1 Byte next payload type, stored in the field next_payload */
+	{ U_INT_8,			offsetof(private_hash_payload_t, next_payload)		},
+	{ RESERVED_BYTE,	offsetof(private_hash_payload_t, reserved)			},
+	/* Length of the whole payload*/
+	{ PAYLOAD_LENGTH,	offsetof(private_hash_payload_t, payload_length)	},
+	/* Hash Data is from variable size */
+	{ HASH_DATA,		offsetof(private_hash_payload_t, hash)				},
+};
+
+/*
+                           1                   2                   3
+       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      ! Next Payload  !    RESERVED   !         Payload Length        !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      !                                                               !
+      ~                       Hash Data                               ~
+      !                                                               !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+METHOD(payload_t, verify, status_t,
+	private_hash_payload_t *this)
+{
+	return SUCCESS;
+}
+
+METHOD(payload_t, get_encoding_rules, int,
+	private_hash_payload_t *this, encoding_rule_t **rules)
+{
+	*rules = encodings;
+	return countof(encodings);
+}
+
+METHOD(payload_t, get_header_length, int,
+	private_hash_payload_t *this)
+{
+	return 4;
+}
+
+METHOD(payload_t, get_type, payload_type_t,
+	private_hash_payload_t *this)
+{
+	return HASH_V1;
+}
+
+METHOD(payload_t, get_next_type, payload_type_t,
+	private_hash_payload_t *this)
+{
+	return this->next_payload;
+}
+
+METHOD(payload_t, set_next_type, void,
+	private_hash_payload_t *this, payload_type_t type)
+{
+	this->next_payload = type;
+}
+
+METHOD(payload_t, get_length, size_t,
+	private_hash_payload_t *this)
+{
+	return this->payload_length;
+}
+
+METHOD(hash_payload_t, set_hash, void,
+	 private_hash_payload_t *this, chunk_t hash)
+{
+	free(this->hash.ptr);
+	this->hash = chunk_clone(hash);
+	this->payload_length = get_header_length(this) + hash.len;
+}
+
+METHOD(hash_payload_t, get_hash, chunk_t,
+	private_hash_payload_t *this)
+{
+	return this->hash;
+}
+
+METHOD2(payload_t, hash_payload_t, destroy, void,
+	private_hash_payload_t *this)
+{
+	free(this->hash.ptr);
+	free(this);
+}
+
+/*
+ * Described in header
+ */
+hash_payload_t *hash_payload_create(payload_type_t type)
+{
+	private_hash_payload_t *this;
+
+	INIT(this,
+		.public = {
+			.payload_interface = {
+				.verify = _verify,
+				.get_encoding_rules = _get_encoding_rules,
+				.get_header_length = _get_header_length,
+				.get_length = _get_length,
+				.get_next_type = _get_next_type,
+				.set_next_type = _set_next_type,
+				.get_type = _get_type,
+				.destroy = _destroy,
+			},
+			.set_hash = _set_hash,
+			.get_hash = _get_hash,
+			.destroy = _destroy,
+		},
+		.next_payload = NO_PAYLOAD,
+		.payload_length = get_header_length(this),
+	);
+	return &this->public;
+}

src/libcharon/encoding/payloads/hash_payload.h

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup hash_payload hash_payload
+ * @{ @ingroup payloads
+ */
+
+#ifndef HASH_PAYLOAD_H_
+#define HASH_PAYLOAD_H_
+
+typedef struct hash_payload_t hash_payload_t;
+
+#include <library.h>
+#include <encoding/payloads/payload.h>
+
+/**
+ * Object representing an IKEv1 hash payload.
+ */
+struct hash_payload_t {
+
+	/**
+	 * The payload_t interface.
+	 */
+	payload_t payload_interface;
+
+	/**
+	 * Set the hash value.
+	 *
+	 * @param hash			chunk containing the hash, will be cloned
+	 */
+	void (*set_hash) (hash_payload_t *this, chunk_t hash);
+
+	/**
+	 * Get the hash value.
+	 *
+	 * @return				chunkt to internal hash data
+	 */
+	chunk_t (*get_hash) (hash_payload_t *this);
+
+	/**
+	 * Destroys an hash_payload_t object.
+	 */
+	void (*destroy) (hash_payload_t *this);
+};
+
+/**
+ * Creates an empty hash_payload_t object.
+ *
+ * @return			hash_payload_t object
+ */
+hash_payload_t *hash_payload_create();
+
+#endif /** HASH_PAYLOAD_H_ @}*/