Moving charon to libcharon.
This commit is contained in:
Tobias Brunner
@@ -0,0 +1,402 @@
|
||||
/*
|
||||
* 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 "transform_substructure.h"
|
||||
|
||||
#include <encoding/payloads/transform_attribute.h>
|
||||
#include <encoding/payloads/encodings.h>
|
||||
#include <library.h>
|
||||
#include <utils/linked_list.h>
|
||||
#include <daemon.h>
|
||||
|
||||
|
||||
typedef struct private_transform_substructure_t private_transform_substructure_t;
|
||||
|
||||
/**
|
||||
* Private data of an transform_substructure_t object.
|
||||
*
|
||||
*/
|
||||
struct private_transform_substructure_t {
|
||||
/**
|
||||
* Public transform_substructure_t interface.
|
||||
*/
|
||||
transform_substructure_t public;
|
||||
|
||||
/**
|
||||
* Next payload type.
|
||||
*/
|
||||
u_int8_t next_payload;
|
||||
|
||||
|
||||
/**
|
||||
* Length of this payload.
|
||||
*/
|
||||
u_int16_t transform_length;
|
||||
|
||||
|
||||
/**
|
||||
* Type of the transform.
|
||||
*/
|
||||
u_int8_t transform_type;
|
||||
|
||||
/**
|
||||
* Transform ID.
|
||||
*/
|
||||
u_int16_t transform_id;
|
||||
|
||||
/**
|
||||
* Transforms Attributes are stored in a linked_list_t.
|
||||
*/
|
||||
linked_list_t *attributes;
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* Encoding rules to parse or generate a Transform substructure.
|
||||
*
|
||||
* The defined offsets are the positions in a object of type
|
||||
* private_transform_substructure_t.
|
||||
*
|
||||
*/
|
||||
encoding_rule_t transform_substructure_encodings[] = {
|
||||
/* 1 Byte next payload type, stored in the field next_payload */
|
||||
{ U_INT_8, offsetof(private_transform_substructure_t, next_payload) },
|
||||
/* Reserved Byte is skipped */
|
||||
{ RESERVED_BYTE, 0 },
|
||||
/* Length of the whole transform substructure*/
|
||||
{ PAYLOAD_LENGTH, offsetof(private_transform_substructure_t, transform_length) },
|
||||
/* transform type is a number of 8 bit */
|
||||
{ U_INT_8, offsetof(private_transform_substructure_t, transform_type) },
|
||||
/* Reserved Byte is skipped */
|
||||
{ RESERVED_BYTE, 0 },
|
||||
/* tranform ID is a number of 8 bit */
|
||||
{ U_INT_16, offsetof(private_transform_substructure_t, transform_id) },
|
||||
/* Attributes are stored in a transform attribute,
|
||||
offset points to a linked_list_t pointer */
|
||||
{ TRANSFORM_ATTRIBUTES, offsetof(private_transform_substructure_t, attributes) }
|
||||
};
|
||||
|
||||
/*
|
||||
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 3 ! RESERVED ! Transform Length !
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
!Transform Type ! RESERVED ! Transform ID !
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
! !
|
||||
~ Transform Attributes ~
|
||||
! !
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
*/
|
||||
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.verify.
|
||||
*/
|
||||
static status_t verify(private_transform_substructure_t *this)
|
||||
{
|
||||
status_t status = SUCCESS;
|
||||
iterator_t *iterator;
|
||||
payload_t *current_attributes;
|
||||
|
||||
if ((this->next_payload != NO_PAYLOAD) && (this->next_payload != 3))
|
||||
{
|
||||
/* must be 0 or 3 */
|
||||
DBG1(DBG_ENC, "inconsistent next payload");
|
||||
return FAILED;
|
||||
}
|
||||
|
||||
switch (this->transform_type)
|
||||
{
|
||||
case ENCRYPTION_ALGORITHM:
|
||||
case PSEUDO_RANDOM_FUNCTION:
|
||||
case INTEGRITY_ALGORITHM:
|
||||
case DIFFIE_HELLMAN_GROUP:
|
||||
case EXTENDED_SEQUENCE_NUMBERS:
|
||||
/* we don't check transform ID, we want to reply
|
||||
* cleanly with NO_PROPOSAL_CHOSEN or so if we don't support it */
|
||||
break;
|
||||
default:
|
||||
{
|
||||
DBG1(DBG_ENC, "invalid transform type: %d", this->transform_type);
|
||||
return FAILED;
|
||||
}
|
||||
}
|
||||
iterator = this->attributes->create_iterator(this->attributes,TRUE);
|
||||
|
||||
while(iterator->iterate(iterator, (void**)¤t_attributes))
|
||||
{
|
||||
status = current_attributes->verify(current_attributes);
|
||||
if (status != SUCCESS)
|
||||
{
|
||||
DBG1(DBG_ENC, "TRANSFORM_ATTRIBUTE verification failed");
|
||||
}
|
||||
}
|
||||
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_transform_substructure_t *this, encoding_rule_t **rules, size_t *rule_count)
|
||||
{
|
||||
*rules = transform_substructure_encodings;
|
||||
*rule_count = sizeof(transform_substructure_encodings) / sizeof(encoding_rule_t);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.get_type.
|
||||
*/
|
||||
static payload_type_t get_type(private_transform_substructure_t *this)
|
||||
{
|
||||
return TRANSFORM_SUBSTRUCTURE;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.get_next_type.
|
||||
*/
|
||||
static payload_type_t get_next_type(private_transform_substructure_t *this)
|
||||
{
|
||||
return (this->next_payload);
|
||||
}
|
||||
|
||||
/**
|
||||
* recompute the length of the payload.
|
||||
*/
|
||||
static void compute_length (private_transform_substructure_t *this)
|
||||
{
|
||||
iterator_t *iterator;
|
||||
payload_t *current_attribute;
|
||||
size_t length = TRANSFORM_SUBSTRUCTURE_HEADER_LENGTH;
|
||||
|
||||
iterator = this->attributes->create_iterator(this->attributes,TRUE);
|
||||
while (iterator->iterate(iterator, (void**)¤t_attribute))
|
||||
{
|
||||
length += current_attribute->get_length(current_attribute);
|
||||
}
|
||||
iterator->destroy(iterator);
|
||||
|
||||
this->transform_length = length;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.get_length.
|
||||
*/
|
||||
static size_t get_length(private_transform_substructure_t *this)
|
||||
{
|
||||
compute_length(this);
|
||||
return this->transform_length;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.create_transform_attribute_iterator.
|
||||
*/
|
||||
static iterator_t *create_transform_attribute_iterator (private_transform_substructure_t *this,bool forward)
|
||||
{
|
||||
return this->attributes->create_iterator(this->attributes,forward);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.add_transform_attribute.
|
||||
*/
|
||||
static void add_transform_attribute (private_transform_substructure_t *this,transform_attribute_t *attribute)
|
||||
{
|
||||
this->attributes->insert_last(this->attributes,(void *) attribute);
|
||||
compute_length(this);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.set_is_last_transform.
|
||||
*/
|
||||
static void set_is_last_transform (private_transform_substructure_t *this, bool is_last)
|
||||
{
|
||||
this->next_payload = (is_last) ? 0: TRANSFORM_TYPE_VALUE;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.get_is_last_transform.
|
||||
*/
|
||||
static bool get_is_last_transform (private_transform_substructure_t *this)
|
||||
{
|
||||
return ((this->next_payload == TRANSFORM_TYPE_VALUE) ? FALSE : TRUE);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.set_next_type.
|
||||
*/
|
||||
static void set_next_type(private_transform_substructure_t *this,payload_type_t type)
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.set_transform_type.
|
||||
*/
|
||||
static void set_transform_type (private_transform_substructure_t *this,u_int8_t type)
|
||||
{
|
||||
this->transform_type = type;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.get_transform_type.
|
||||
*/
|
||||
static u_int8_t get_transform_type (private_transform_substructure_t *this)
|
||||
{
|
||||
return this->transform_type;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.set_transform_id.
|
||||
*/
|
||||
static void set_transform_id (private_transform_substructure_t *this,u_int16_t id)
|
||||
{
|
||||
this->transform_id = id;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.get_transform_id.
|
||||
*/
|
||||
static u_int16_t get_transform_id (private_transform_substructure_t *this)
|
||||
{
|
||||
return this->transform_id;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.clone.
|
||||
*/
|
||||
static transform_substructure_t *clone_(private_transform_substructure_t *this)
|
||||
{
|
||||
private_transform_substructure_t *clone;
|
||||
iterator_t *attributes;
|
||||
transform_attribute_t *current_attribute;
|
||||
|
||||
clone = (private_transform_substructure_t *) transform_substructure_create();
|
||||
clone->next_payload = this->next_payload;
|
||||
clone->transform_type = this->transform_type;
|
||||
clone->transform_id = this->transform_id;
|
||||
|
||||
attributes = this->attributes->create_iterator(this->attributes, FALSE);
|
||||
while (attributes->iterate(attributes, (void**)¤t_attribute))
|
||||
{
|
||||
current_attribute = current_attribute->clone(current_attribute);
|
||||
clone->public.add_transform_attribute(&clone->public, current_attribute);
|
||||
}
|
||||
attributes->destroy(attributes);
|
||||
|
||||
return &clone->public;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.get_key_length.
|
||||
*/
|
||||
static status_t get_key_length(private_transform_substructure_t *this, u_int16_t *key_length)
|
||||
{
|
||||
iterator_t *attributes;
|
||||
transform_attribute_t *current_attribute;
|
||||
|
||||
attributes = this->attributes->create_iterator(this->attributes, TRUE);
|
||||
while (attributes->iterate(attributes, (void**)¤t_attribute))
|
||||
{
|
||||
if (current_attribute->get_attribute_type(current_attribute) == KEY_LENGTH)
|
||||
{
|
||||
*key_length = current_attribute->get_value(current_attribute);
|
||||
attributes->destroy(attributes);
|
||||
return SUCCESS;
|
||||
}
|
||||
}
|
||||
attributes->destroy(attributes);
|
||||
return FAILED;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Implementation of transform_substructure_t.destroy and payload_t.destroy.
|
||||
*/
|
||||
static void destroy(private_transform_substructure_t *this)
|
||||
{
|
||||
this->attributes->destroy_offset(this->attributes,
|
||||
offsetof(transform_attribute_t, destroy));
|
||||
free(this);
|
||||
}
|
||||
|
||||
/*
|
||||
* Described in header.
|
||||
*/
|
||||
transform_substructure_t *transform_substructure_create()
|
||||
{
|
||||
private_transform_substructure_t *this = malloc_thing(private_transform_substructure_t);
|
||||
|
||||
/* payload interface */
|
||||
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_attribute_iterator = (iterator_t * (*) (transform_substructure_t *,bool)) create_transform_attribute_iterator;
|
||||
this->public.add_transform_attribute = (void (*) (transform_substructure_t *,transform_attribute_t *)) add_transform_attribute;
|
||||
this->public.set_is_last_transform = (void (*) (transform_substructure_t *,bool)) set_is_last_transform;
|
||||
this->public.get_is_last_transform = (bool (*) (transform_substructure_t *)) get_is_last_transform;
|
||||
this->public.set_transform_type = (void (*) (transform_substructure_t *,u_int8_t)) set_transform_type;
|
||||
this->public.get_transform_type = (u_int8_t (*) (transform_substructure_t *)) get_transform_type;
|
||||
this->public.set_transform_id = (void (*) (transform_substructure_t *,u_int16_t)) set_transform_id;
|
||||
this->public.get_transform_id = (u_int16_t (*) (transform_substructure_t *)) get_transform_id;
|
||||
this->public.get_key_length = (status_t (*) (transform_substructure_t *,u_int16_t *)) get_key_length;
|
||||
this->public.clone = (transform_substructure_t* (*) (transform_substructure_t *)) clone_;
|
||||
this->public.destroy = (void (*) (transform_substructure_t *)) destroy;
|
||||
|
||||
/* set default values of the fields */
|
||||
this->next_payload = NO_PAYLOAD;
|
||||
this->transform_length = TRANSFORM_SUBSTRUCTURE_HEADER_LENGTH;
|
||||
this->transform_id = 0;
|
||||
this->transform_type = 0;
|
||||
this->attributes = linked_list_create();
|
||||
|
||||
return (&(this->public));
|
||||
}
|
||||
|
||||
/*
|
||||
* Described in header
|
||||
*/
|
||||
transform_substructure_t *transform_substructure_create_type(
|
||||
transform_type_t transform_type,
|
||||
u_int16_t transform_id, u_int16_t key_length)
|
||||
{
|
||||
transform_substructure_t *transform = transform_substructure_create();
|
||||
|
||||
transform->set_transform_type(transform,transform_type);
|
||||
transform->set_transform_id(transform,transform_id);
|
||||
|
||||
if (key_length)
|
||||
{
|
||||
transform_attribute_t *attribute;
|
||||
|
||||
attribute = transform_attribute_create_key_length(key_length);
|
||||
transform->add_transform_attribute(transform, attribute);
|
||||
|
||||
}
|
||||
return transform;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user