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-rw-r--r--Source/charon/encoding/payloads/proposal_substructure.c629
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diff --git a/Source/charon/encoding/payloads/proposal_substructure.c b/Source/charon/encoding/payloads/proposal_substructure.c
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--- a/Source/charon/encoding/payloads/proposal_substructure.c
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-/**
- * @file proposal_substructure.h
- *
- * @brief Implementation of proposal_substructure_t.
- *
- */
-
-/*
- * Copyright (C) 2005 Jan Hutter, Martin Willi
- * 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 <types.h>
-#include <utils/linked_list.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;
-
- /**
- * @brief Computes the length of this substructure.
- *
- * @param this calling private_proposal_substructure_t object
- */
- void (*compute_length) (private_proposal_substructure_t *this);
-};
-
-/**
- * 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;
-
- if ((this->next_payload != NO_PAYLOAD) && (this->next_payload != 2))
- {
- /* must be 0 or 2 */
- return FAILED;
- }
- if (this->transforms_count != this->transforms->get_count(this->transforms))
- {
- /* must be the same! */
- return FAILED;
- }
-
- if ((this->protocol_id == 0) || (this->protocol_id >= 4))
- {
- /* reserved are not supported */
- return FAILED;
- }
-
- iterator = this->transforms->create_iterator(this->transforms,TRUE);
-
- while(iterator->has_next(iterator))
- {
- payload_t *current_transform;
- iterator->current(iterator,(void **)&current_transform);
-
- status = current_transform->verify(current_transform);
- if (status != SUCCESS)
- {
- 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)
-{
-}
-
-/**
- * Implementation of payload_t.get_length.
- */
-static size_t get_length(private_proposal_substructure_t *this)
-{
- 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);
- this->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;
- this->compute_length(this);
- }
-
- this->spi.ptr = clalloc(spi.ptr,spi.len);
- this->spi.len = spi.len;
- this->spi_size = spi.len;
- this->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_info_for_transform_type.
- */
-static status_t get_info_for_transform_type (private_proposal_substructure_t *this,transform_type_t type, u_int16_t *transform_id, u_int16_t *key_length)
-{
- iterator_t *iterator;
- status_t status;
- u_int16_t found_transform_id;
- u_int16_t found_key_length;
-
- iterator = this->transforms->create_iterator(this->transforms,TRUE);
-
- while (iterator->has_next(iterator))
- {
- transform_substructure_t *current_transform;
- status = iterator->current(iterator,(void **) &current_transform);
- if (status != SUCCESS)
- {
- break;
- }
- if (current_transform->get_transform_type(current_transform) == type)
- {
- /* now get data for specific type */
- found_transform_id = current_transform->get_transform_id(current_transform);
- status = current_transform->get_key_length(current_transform,&found_key_length);
- *transform_id = found_transform_id;
- *key_length = found_key_length;
- iterator->destroy(iterator);
- return status;
- }
- }
- iterator->destroy(iterator);
- return NOT_FOUND;
-}
-
-/**
- * Implementation of private_proposal_substructure_t.compute_length.
- */
-static void compute_length (private_proposal_substructure_t *this)
-{
- iterator_t *iterator;
- size_t transforms_count = 0;
- size_t length = PROPOSAL_SUBSTRUCTURE_HEADER_LENGTH;
- iterator = this->transforms->create_iterator(this->transforms,TRUE);
- while (iterator->has_next(iterator))
- {
- payload_t * current_transform;
- iterator->current(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 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.add_to_proposal.
- */
-void add_to_proposal(private_proposal_substructure_t *this, proposal_t *proposal)
-{
- iterator_t *iterator = this->transforms->create_iterator(this->transforms, TRUE);
- u_int32_t spi;
-
-
- while (iterator->has_next(iterator))
- {
- transform_substructure_t *transform;
- transform_type_t transform_type;
- u_int16_t transform_id;
- u_int16_t key_length = 0;
-
- iterator->current(iterator, (void**)&transform);
-
- 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, this->protocol_id, transform_type, transform_id, key_length);
- }
- iterator->destroy(iterator);
-
- spi = *((u_int32_t*)this->spi.ptr);
-
- proposal->set_spi(proposal, this->protocol_id, spi);
-}
-
-/**
- * Implementation of proposal_substructure_t.clone.
- */
-static private_proposal_substructure_t* clone(private_proposal_substructure_t *this)
-{
- private_proposal_substructure_t * new_clone;
- iterator_t *transforms;
-
- new_clone = (private_proposal_substructure_t *) proposal_substructure_create();
-
- new_clone->next_payload = this->next_payload;
- new_clone->proposal_number = this->proposal_number;
- new_clone->protocol_id = this->protocol_id;
- new_clone->spi_size = this->spi_size;
- if (this->spi.ptr != NULL)
- {
- new_clone->spi.ptr = clalloc(this->spi.ptr,this->spi.len);
- new_clone->spi.len = this->spi.len;
- }
-
- transforms = this->transforms->create_iterator(this->transforms,FALSE);
-
- while (transforms->has_next(transforms))
- {
- transform_substructure_t *current_transform;
- transform_substructure_t *current_transform_clone;
-
- transforms->current(transforms,(void **) &current_transform);
-
- current_transform_clone = current_transform->clone(current_transform);
-
- new_clone->public.add_transform_substructure(&(new_clone->public),current_transform_clone);
- }
-
- transforms->destroy(transforms);
-
- return new_clone;
-}
-
-/**
- * Implements payload_t's and proposal_substructure_t's destroy function.
- * See #payload_s.destroy or proposal_substructure_s.destroy for description.
- */
-static status_t destroy(private_proposal_substructure_t *this)
-{
- /* all proposals are getting destroyed */
- while (this->transforms->get_count(this->transforms) > 0)
- {
- transform_substructure_t *current_transform;
- if (this->transforms->remove_last(this->transforms,(void **)&current_transform) != SUCCESS)
- {
- break;
- }
- current_transform->destroy(current_transform);
- }
- this->transforms->destroy(this->transforms);
-
- if (this->spi.ptr != NULL)
- {
- free(this->spi.ptr);
- }
-
- free(this);
-
- return SUCCESS;
-}
-
-/*
- * 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.get_info_for_transform_type = (status_t (*) (proposal_substructure_t *,transform_type_t,u_int16_t *, u_int16_t *))get_info_for_transform_type;
- this->public.set_is_last_proposal = (void (*) (proposal_substructure_t *,bool)) set_is_last_proposal;
- this->public.add_to_proposal = (void (*) (proposal_substructure_t*,proposal_t*))add_to_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;
-
- /* private functions */
- this->compute_length = compute_length;
-
- /* 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, protocol_id_t proto)
-{
- private_proposal_substructure_t *this = (private_proposal_substructure_t*)proposal_substructure_create();
- iterator_t *iterator;
- algorithm_t *algo;
- transform_substructure_t *transform;
-
- /* encryption algorithm is only availble in ESP */
- iterator = proposal->create_algorithm_iterator(proposal, proto, ENCRYPTION_ALGORITHM);
- while (iterator->has_next(iterator))
- {
- iterator->current(iterator, (void**)&algo);
- transform = transform_substructure_create_type(ENCRYPTION_ALGORITHM, algo->algorithm, algo->key_size);
- this->public.add_transform_substructure(&(this->public), transform);
- }
- iterator->destroy(iterator);
-
- /* integrity algorithms */
- iterator = proposal->create_algorithm_iterator(proposal, proto, INTEGRITY_ALGORITHM);
- while (iterator->has_next(iterator))
- {
- algorithm_t *algo;
- iterator->current(iterator, (void**)&algo);
- transform = transform_substructure_create_type(INTEGRITY_ALGORITHM, algo->algorithm, algo->key_size);
- this->public.add_transform_substructure(&(this->public), transform);
- }
- iterator->destroy(iterator);
-
- /* prf algorithms */
- iterator = proposal->create_algorithm_iterator(proposal, proto, PSEUDO_RANDOM_FUNCTION);
- while (iterator->has_next(iterator))
- {
- algorithm_t *algo;
- iterator->current(iterator, (void**)&algo);
- transform = transform_substructure_create_type(PSEUDO_RANDOM_FUNCTION, algo->algorithm, algo->key_size);
- this->public.add_transform_substructure(&(this->public), transform);
- }
- iterator->destroy(iterator);
-
- /* dh groups */
- iterator = proposal->create_algorithm_iterator(proposal, proto, DIFFIE_HELLMAN_GROUP);
- while (iterator->has_next(iterator))
- {
- algorithm_t *algo;
- iterator->current(iterator, (void**)&algo);
- transform = transform_substructure_create_type(DIFFIE_HELLMAN_GROUP, algo->algorithm, 0);
- this->public.add_transform_substructure(&(this->public), transform);
- }
- iterator->destroy(iterator);
-
- /* extended sequence numbers */
- iterator = proposal->create_algorithm_iterator(proposal, proto, EXTENDED_SEQUENCE_NUMBERS);
- while (iterator->has_next(iterator))
- {
- algorithm_t *algo;
- iterator->current(iterator, (void**)&algo);
- transform = transform_substructure_create_type(EXTENDED_SEQUENCE_NUMBERS, algo->algorithm, 0);
- this->public.add_transform_substructure(&(this->public), transform);
- }
- iterator->destroy(iterator);
-
- /* take over general infos */
- this->spi_size = proto == PROTO_IKE ? 8 : 4;
- this->spi.len = this->spi_size;
- this->spi.ptr = malloc(this->spi_size);
- *((u_int32_t*)this->spi.ptr) = proposal->get_spi(proposal, proto);
- this->proposal_number = proposal->get_number(proposal);
- this->protocol_id = proto;
-
- return &(this->public);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-21 03:26:29 +0000