diff options
Diffstat (limited to 'src/charon/encoding/payloads/proposal_substructure.c')
| -rw-r--r-- | src/charon/encoding/payloads/proposal_substructure.c | 598 |
1 files changed, 0 insertions, 598 deletions
diff --git a/src/charon/encoding/payloads/proposal_substructure.c b/src/charon/encoding/payloads/proposal_substructure.c deleted file mode 100644 index c93f73a68..000000000 --- a/src/charon/encoding/payloads/proposal_substructure.c +++ /dev/null @@ -1,598 +0,0 @@ -/* - * 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**)¤t_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**)¤t_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**)¤t_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; -} |