[svn-upgrade] Integrating new upstream version, strongswan (4.4.0)

1 files changed, 598 insertions, 0 deletions

diff --git a/src/libcharon/encoding/payloads/proposal_substructure.c b/src/libcharon/encoding/payloads/proposal_substructure.c
new file mode 100644
index 000000000..c93f73a68
--- /dev/null
+++ b/src/libcharon/encoding/payloads/proposal_substructure.c
@@ -0,0 +1,598 @@
+/*
+ * Copyright (C) 2005-2006 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * Hochschule fuer Technik Rapperswil
+ *
+ * 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 "proposal_substructure.h"
+
+#include <encoding/payloads/encodings.h>
+#include <encoding/payloads/transform_substructure.h>
+#include <library.h>
+#include <utils/linked_list.h>
+#include <daemon.h>
+
+
+/**
+ * IKEv1 Value for a proposal payload.
+ */
+#define PROPOSAL_TYPE_VALUE 2
+
+
+typedef struct private_proposal_substructure_t private_proposal_substructure_t;
+
+/**
+ * Private data of an proposal_substructure_t object.
+ *
+ */
+struct private_proposal_substructure_t {
+	/**
+	 * Public proposal_substructure_t interface.
+	 */
+	proposal_substructure_t public;
+
+	/**
+	 * Next payload type.
+	 */
+	u_int8_t  next_payload;
+
+	/**
+	 * Length of this payload.
+	 */
+	u_int16_t proposal_length;
+
+	/**
+	 * Proposal number.
+	 */
+	u_int8_t proposal_number;
+
+	/**
+	 * Protocol ID.
+	 */
+	u_int8_t protocol_id;
+
+	/**
+	 * SPI size of the following SPI.
+	 */
+	u_int8_t  spi_size;
+
+	/**
+	 * Number of transforms.
+	 */
+	u_int8_t  transforms_count;
+
+	/**
+	 * SPI is stored as chunk.
+	 */
+	chunk_t spi;
+
+	/**
+	 * Transforms are stored in a linked_list_t.
+	 */
+	linked_list_t * transforms;
+};
+
+/**
+ * Encoding rules to parse or generate a Proposal substructure.
+ *
+ * The defined offsets are the positions in a object of type
+ * private_proposal_substructure_t.
+ */
+encoding_rule_t proposal_substructure_encodings[] = {
+	/* 1 Byte next payload type, stored in the field next_payload */
+	{ U_INT_8,			offsetof(private_proposal_substructure_t, next_payload) 		},
+	/* Reserved Byte is skipped */
+	{ RESERVED_BYTE,		0															},
+	/* Length of the whole proposal substructure payload*/
+	{ PAYLOAD_LENGTH,		offsetof(private_proposal_substructure_t, proposal_length) 	},
+	/* proposal number is a number of 8 bit */
+	{ U_INT_8,				offsetof(private_proposal_substructure_t, proposal_number) 	},
+	/* protocol ID is a number of 8 bit */
+	{ U_INT_8,				offsetof(private_proposal_substructure_t, protocol_id)		},
+	/* SPI Size has its own type */
+	{ SPI_SIZE,				offsetof(private_proposal_substructure_t, spi_size)			},
+	/* Number of transforms is a number of 8 bit */
+	{ U_INT_8,				offsetof(private_proposal_substructure_t, transforms_count)	},
+	/* SPI is a chunk of variable size*/
+	{ SPI,					offsetof(private_proposal_substructure_t, spi)				},
+	/* Transforms are stored in a transform substructure,
+	   offset points to a linked_list_t pointer */
+	{ TRANSFORMS,			offsetof(private_proposal_substructure_t, transforms) 		}
+};
+
+/*
+                           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
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      ! 0 (last) or 2 !   RESERVED    !         Proposal Length       !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      ! Proposal #    !  Protocol ID  !    SPI Size   !# of Transforms!
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      ~                        SPI (variable)                         ~
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      !                                                               !
+      ~                        <Transforms>                           ~
+      !                                                               !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+/**
+ * Implementation of payload_t.verify.
+ */
+static status_t verify(private_proposal_substructure_t *this)
+{
+	status_t status = SUCCESS;
+	iterator_t *iterator;
+	payload_t *current_transform;
+
+	if ((this->next_payload != NO_PAYLOAD) && (this->next_payload != 2))
+	{
+		/* must be 0 or 2 */
+		DBG1(DBG_ENC, "inconsistent next payload");
+		return FAILED;
+	}
+	if (this->transforms_count != this->transforms->get_count(this->transforms))
+	{
+		/* must be the same! */
+		DBG1(DBG_ENC, "transform count invalid");
+		return FAILED;
+	}
+
+	switch (this->protocol_id)
+	{
+		case PROTO_AH:
+		case PROTO_ESP:
+			if (this->spi.len != 4)
+			{
+				DBG1(DBG_ENC, "invalid SPI length in %N proposal",
+								  protocol_id_names, this->protocol_id);
+				return FAILED;
+			}
+			break;
+		case PROTO_IKE:
+			if (this->spi.len != 0 && this->spi.len  != 8)
+			{
+				DBG1(DBG_ENC, "invalid SPI length in IKE proposal");
+				return FAILED;
+			}
+			break;
+		default:
+			DBG1(DBG_ENC, "invalid proposal protocol (%d)", this->protocol_id);
+			return FAILED;
+	}
+	if ((this->protocol_id == 0) || (this->protocol_id >= 4))
+	{
+		/* reserved are not supported */
+		DBG1(DBG_ENC, "invalid protocol");
+		return FAILED;
+	}
+
+	iterator = this->transforms->create_iterator(this->transforms,TRUE);
+	while(iterator->iterate(iterator, (void**)&current_transform))
+	{
+		status = current_transform->verify(current_transform);
+		if (status != SUCCESS)
+		{
+			DBG1(DBG_ENC, "TRANSFORM_SUBSTRUCTURE verification failed");
+			break;
+		}
+	}
+	iterator->destroy(iterator);
+
+	/* proposal number is checked in SA payload */
+	return status;
+}
+
+/**
+ * Implementation of payload_t.get_encoding_rules.
+ */
+static void get_encoding_rules(private_proposal_substructure_t *this, encoding_rule_t **rules, size_t *rule_count)
+{
+	*rules = proposal_substructure_encodings;
+	*rule_count = sizeof(proposal_substructure_encodings) / sizeof(encoding_rule_t);
+}
+
+/**
+ * Implementation of payload_t.get_type.
+ */
+static payload_type_t get_type(private_proposal_substructure_t *this)
+{
+	return PROPOSAL_SUBSTRUCTURE;
+}
+
+/**
+ * Implementation of payload_t.get_next_type.
+ */
+static payload_type_t get_next_type(private_proposal_substructure_t *this)
+{
+	return (this->next_payload);
+}
+
+/**
+ * Implementation of payload_t.set_next_type.
+ */
+static void set_next_type(private_proposal_substructure_t *this,payload_type_t type)
+{
+}
+
+/**
+ * (re-)compute the length of the payload.
+ */
+static void compute_length(private_proposal_substructure_t *this)
+{
+	iterator_t *iterator;
+	payload_t *current_transform;
+	size_t transforms_count = 0;
+	size_t length = PROPOSAL_SUBSTRUCTURE_HEADER_LENGTH;
+
+	iterator = this->transforms->create_iterator(this->transforms,TRUE);
+	while (iterator->iterate(iterator, (void**)&current_transform))
+	{
+		length += current_transform->get_length(current_transform);
+		transforms_count++;
+	}
+	iterator->destroy(iterator);
+
+	length += this->spi.len;
+	this->transforms_count = transforms_count;
+	this->proposal_length = length;
+}
+
+/**
+ * Implementation of payload_t.get_length.
+ */
+static size_t get_length(private_proposal_substructure_t *this)
+{
+	compute_length(this);
+	return this->proposal_length;
+}
+
+/**
+ * Implementation of proposal_substructure_t.create_transform_substructure_iterator.
+ */
+static iterator_t *create_transform_substructure_iterator (private_proposal_substructure_t *this,bool forward)
+{
+	return (this->transforms->create_iterator(this->transforms,forward));
+}
+
+/**
+ * Implementation of proposal_substructure_t.add_transform_substructure.
+ */
+static void add_transform_substructure (private_proposal_substructure_t *this,transform_substructure_t *transform)
+{
+	status_t status;
+	if (this->transforms->get_count(this->transforms) > 0)
+	{
+		transform_substructure_t *last_transform;
+		status = this->transforms->get_last(this->transforms,(void **) &last_transform);
+		/* last transform is now not anymore last one */
+		last_transform->set_is_last_transform(last_transform,FALSE);
+
+	}
+	transform->set_is_last_transform(transform,TRUE);
+
+	this->transforms->insert_last(this->transforms,(void *) transform);
+	compute_length(this);
+}
+
+/**
+ * Implementation of proposal_substructure_t.proposal_substructure_t.
+ */
+static void set_is_last_proposal (private_proposal_substructure_t *this, bool is_last)
+{
+	this->next_payload = (is_last) ? 0: PROPOSAL_TYPE_VALUE;
+}
+
+/**
+ * Implementation of proposal_substructure_t.set_proposal_number.
+ */
+static void set_proposal_number(private_proposal_substructure_t *this,u_int8_t proposal_number)
+{
+	this->proposal_number = proposal_number;
+}
+
+/**
+ * Implementation of proposal_substructure_t.get_proposal_number.
+ */
+static u_int8_t get_proposal_number (private_proposal_substructure_t *this)
+{
+	return (this->proposal_number);
+}
+
+/**
+ * Implementation of proposal_substructure_t.set_protocol_id.
+ */
+static void set_protocol_id(private_proposal_substructure_t *this,u_int8_t protocol_id)
+{
+	this->protocol_id = protocol_id;
+}
+
+/**
+ * Implementation of proposal_substructure_t.get_protocol_id.
+ */
+static u_int8_t get_protocol_id(private_proposal_substructure_t *this)
+{
+	return (this->protocol_id);
+}
+
+/**
+ * Implementation of proposal_substructure_t.set_spi.
+ */
+static void set_spi(private_proposal_substructure_t *this, chunk_t spi)
+{
+	/* first delete already set spi value */
+	if (this->spi.ptr != NULL)
+	{
+		free(this->spi.ptr);
+		this->spi.ptr = NULL;
+		this->spi.len = 0;
+		compute_length(this);
+	}
+
+	this->spi.ptr = clalloc(spi.ptr,spi.len);
+	this->spi.len = spi.len;
+	this->spi_size = spi.len;
+	compute_length(this);
+}
+
+/**
+ * Implementation of proposal_substructure_t.get_spi.
+ */
+static chunk_t get_spi(private_proposal_substructure_t *this)
+{
+	chunk_t spi;
+	spi.ptr = this->spi.ptr;
+	spi.len = this->spi.len;
+
+	return spi;
+}
+
+/**
+ * Implementation of proposal_substructure_t.get_transform_count.
+ */
+static size_t get_transform_count (private_proposal_substructure_t *this)
+{
+	return this->transforms->get_count(this->transforms);
+}
+
+/**
+ * Implementation of proposal_substructure_t.get_spi_size.
+ */
+static size_t get_spi_size (private_proposal_substructure_t *this)
+{
+	return this->spi.len;
+}
+
+/**
+ * Implementation of proposal_substructure_t.get_proposal.
+ */
+proposal_t* get_proposal(private_proposal_substructure_t *this)
+{
+	iterator_t *iterator;
+	transform_substructure_t *transform;
+	proposal_t *proposal;
+	u_int64_t spi;
+
+	proposal = proposal_create(this->protocol_id);
+
+	iterator = this->transforms->create_iterator(this->transforms, TRUE);
+	while (iterator->iterate(iterator, (void**)&transform))
+	{
+		transform_type_t transform_type;
+		u_int16_t transform_id;
+		u_int16_t key_length = 0;
+
+		transform_type = transform->get_transform_type(transform);
+		transform_id = transform->get_transform_id(transform);
+		transform->get_key_length(transform, &key_length);
+
+		proposal->add_algorithm(proposal, transform_type, transform_id, key_length);
+	}
+	iterator->destroy(iterator);
+
+	switch (this->spi.len)
+	{
+		case 4:
+			spi = *((u_int32_t*)this->spi.ptr);
+			break;
+		case 8:
+			spi = *((u_int64_t*)this->spi.ptr);
+			break;
+		default:
+			spi = 0;
+	}
+	proposal->set_spi(proposal, spi);
+
+	return proposal;
+}
+
+/**
+ * Implementation of proposal_substructure_t.clone.
+ */
+static private_proposal_substructure_t* clone_(private_proposal_substructure_t *this)
+{
+	private_proposal_substructure_t *clone;
+	iterator_t *transforms;
+	transform_substructure_t *current_transform;
+
+	clone = (private_proposal_substructure_t *) proposal_substructure_create();
+	clone->next_payload = this->next_payload;
+	clone->proposal_number = this->proposal_number;
+	clone->protocol_id = this->protocol_id;
+	clone->spi_size = this->spi_size;
+	if (this->spi.ptr != NULL)
+	{
+		clone->spi.ptr = clalloc(this->spi.ptr,this->spi.len);
+		clone->spi.len = this->spi.len;
+	}
+
+	transforms = this->transforms->create_iterator(this->transforms,FALSE);
+	while (transforms->iterate(transforms, (void**)&current_transform))
+	{
+		current_transform = current_transform->clone(current_transform);
+		clone->public.add_transform_substructure(&clone->public, current_transform);
+	}
+	transforms->destroy(transforms);
+
+	return clone;
+}
+
+/**
+ * Implements payload_t's and proposal_substructure_t's destroy function.
+ * See #payload_s.destroy or proposal_substructure_s.destroy for description.
+ */
+static void destroy(private_proposal_substructure_t *this)
+{
+	this->transforms->destroy_offset(this->transforms,
+									 offsetof(transform_substructure_t, destroy));
+	chunk_free(&this->spi);
+	free(this);
+}
+
+/*
+ * Described in header.
+ */
+proposal_substructure_t *proposal_substructure_create()
+{
+	private_proposal_substructure_t *this = malloc_thing(private_proposal_substructure_t);
+
+	/* interface functions */
+	this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
+	this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules;
+	this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length;
+	this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type;
+	this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type;
+	this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_type;
+	this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
+
+
+	/* public functions */
+	this->public.create_transform_substructure_iterator = (iterator_t* (*) (proposal_substructure_t *,bool)) create_transform_substructure_iterator;
+	this->public.add_transform_substructure = (void (*) (proposal_substructure_t *,transform_substructure_t *)) add_transform_substructure;
+	this->public.set_proposal_number = (void (*) (proposal_substructure_t *,u_int8_t))set_proposal_number;
+	this->public.get_proposal_number = (u_int8_t (*) (proposal_substructure_t *)) get_proposal_number;
+	this->public.set_protocol_id = (void (*) (proposal_substructure_t *,u_int8_t))set_protocol_id;
+	this->public.get_protocol_id = (u_int8_t (*) (proposal_substructure_t *)) get_protocol_id;
+	this->public.set_is_last_proposal = (void (*) (proposal_substructure_t *,bool)) set_is_last_proposal;
+	this->public.get_proposal = (proposal_t* (*) (proposal_substructure_t*))get_proposal;
+	this->public.set_spi = (void (*) (proposal_substructure_t *,chunk_t))set_spi;
+	this->public.get_spi = (chunk_t (*) (proposal_substructure_t *)) get_spi;
+	this->public.get_transform_count = (size_t (*) (proposal_substructure_t *)) get_transform_count;
+	this->public.get_spi_size = (size_t (*) (proposal_substructure_t *)) get_spi_size;
+	this->public.clone = (proposal_substructure_t * (*) (proposal_substructure_t *)) clone_;
+	this->public.destroy = (void (*) (proposal_substructure_t *)) destroy;
+
+	/* set default values of the fields */
+	this->next_payload = NO_PAYLOAD;
+	this->proposal_length = 0;
+	this->proposal_number = 0;
+	this->protocol_id = 0;
+	this->transforms_count = 0;
+	this->spi_size = 0;
+	this->spi.ptr = NULL;
+	this->spi.len = 0;
+
+	this->transforms = linked_list_create();
+
+	return (&(this->public));
+}
+
+/*
+ * Described in header.
+ */
+proposal_substructure_t *proposal_substructure_create_from_proposal(proposal_t *proposal)
+{
+	transform_substructure_t *transform;
+	private_proposal_substructure_t *this;
+	u_int16_t alg, key_size;
+	enumerator_t *enumerator;
+
+	this = (private_proposal_substructure_t*)proposal_substructure_create();
+
+	/* encryption algorithm is only availble in ESP */
+	enumerator = proposal->create_enumerator(proposal, ENCRYPTION_ALGORITHM);
+	while (enumerator->enumerate(enumerator, &alg, &key_size))
+	{
+		transform = transform_substructure_create_type(ENCRYPTION_ALGORITHM,
+													   alg, key_size);
+		add_transform_substructure(this, transform);
+	}
+	enumerator->destroy(enumerator);
+
+	/* integrity algorithms */
+	enumerator = proposal->create_enumerator(proposal, INTEGRITY_ALGORITHM);
+	while (enumerator->enumerate(enumerator, &alg, &key_size))
+	{
+		transform = transform_substructure_create_type(INTEGRITY_ALGORITHM,
+													   alg, key_size);
+		add_transform_substructure(this, transform);
+	}
+	enumerator->destroy(enumerator);
+
+	/* prf algorithms */
+	enumerator = proposal->create_enumerator(proposal, PSEUDO_RANDOM_FUNCTION);
+	while (enumerator->enumerate(enumerator, &alg, &key_size))
+	{
+		transform = transform_substructure_create_type(PSEUDO_RANDOM_FUNCTION,
+													   alg, key_size);
+		add_transform_substructure(this, transform);
+	}
+	enumerator->destroy(enumerator);
+
+	/* dh groups */
+	enumerator = proposal->create_enumerator(proposal, DIFFIE_HELLMAN_GROUP);
+	while (enumerator->enumerate(enumerator, &alg, NULL))
+	{
+		transform = transform_substructure_create_type(DIFFIE_HELLMAN_GROUP,
+													   alg, 0);
+		add_transform_substructure(this, transform);
+	}
+	enumerator->destroy(enumerator);
+
+	/* extended sequence numbers */
+	enumerator = proposal->create_enumerator(proposal, EXTENDED_SEQUENCE_NUMBERS);
+	while (enumerator->enumerate(enumerator, &alg, NULL))
+	{
+		transform = transform_substructure_create_type(EXTENDED_SEQUENCE_NUMBERS,
+													   alg, 0);
+		add_transform_substructure(this, transform);
+	}
+	enumerator->destroy(enumerator);
+
+	/* add SPI, if necessary */
+	switch (proposal->get_protocol(proposal))
+	{
+		case PROTO_AH:
+		case PROTO_ESP:
+			this->spi_size = this->spi.len = 4;
+			this->spi.ptr = malloc(this->spi_size);
+			*((u_int32_t*)this->spi.ptr) = proposal->get_spi(proposal);
+			break;
+		case PROTO_IKE:
+			if (proposal->get_spi(proposal))
+			{	/* IKE only uses SPIS when rekeying, but on initial setup */
+				this->spi_size = this->spi.len = 8;
+				this->spi.ptr = malloc(this->spi_size);
+				*((u_int64_t*)this->spi.ptr) = proposal->get_spi(proposal);
+			}
+			break;
+		default:
+			break;
+	}
+	this->proposal_number = 0;
+	this->protocol_id = proposal->get_protocol(proposal);
+
+	return &this->public;
+}