/*
* Copyright (C) 2011-2012 Sansar Choinyambuu
* Copyright (C) 2011-2014 Andreas Steffen
* HSR 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 "tcg_pts_attr_req_func_comp_evid.h"
#include <pa_tnc/pa_tnc_msg.h>
#include <bio/bio_writer.h>
#include <bio/bio_reader.h>
#include <collections/linked_list.h>
#include <utils/debug.h>
typedef struct private_tcg_pts_attr_req_func_comp_evid_t private_tcg_pts_attr_req_func_comp_evid_t;
/**
* Request Functional Component Evidence
* see section 3.14.1 of PTS Protocol: Binding to TNC IF-M Specification
*
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Flags | Sub-component Depth (for Component #1) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Component Functional Name #1 |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Component Functional Name #1 |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | ........ |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Flags | Sub-component Depth (for Component #N) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Component Functional Name #N |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Component Functional Name #N |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
/**
* Component Functional Name Structure
* (see section 5.1 of PTS Protocol: Binding to TNC IF-M Specification)
*
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Component Functional Name Vendor ID |Fam| Qualifier |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Component Functional Name |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
#define PTS_REQ_FUNC_COMP_EVID_SIZE 12
#define PTS_REQ_FUNC_COMP_FAMILY_MASK 0xC0
/**
* Private data of an tcg_pts_attr_req_func_comp_evid_t object.
*/
struct private_tcg_pts_attr_req_func_comp_evid_t {
/**
* Public members of tcg_pts_attr_req_func_comp_evid_t
*/
tcg_pts_attr_req_func_comp_evid_t public;
/**
* Vendor-specific attribute type
*/
pen_type_t type;
/**
* Length of attribute value
*/
size_t length;
/**
* Attribute value or segment
*/
chunk_t value;
/**
* Noskip flag
*/
bool noskip_flag;
/**
* List of Functional Components
*/
linked_list_t *list;
/**
* Reference count
*/
refcount_t ref;
};
typedef struct entry_t entry_t;
/**
* Functional component entry
*/
struct entry_t {
uint8_t flags;
uint32_t depth;
pts_comp_func_name_t *name;
};
CALLBACK(entry_filter, bool,
void *null, enumerator_t *orig, va_list args)
{
entry_t *entry;
pts_comp_func_name_t **name;
uint32_t *depth;
uint8_t *flags;
VA_ARGS_VGET(args, flags, depth, name);
if (orig->enumerate(orig, &entry))
{
*flags = entry->flags;
*depth = entry->depth;
*name = entry->name;
return TRUE;
}
return FALSE;
}
/**
* Free an entry_t object
*/
static void free_entry(entry_t *this)
{
if (this)
{
this->name->destroy(this->name);
free(this);
}
}
METHOD(pa_tnc_attr_t, get_type, pen_type_t,
private_tcg_pts_attr_req_func_comp_evid_t *this)
{
return this->type;
}
METHOD(pa_tnc_attr_t, get_value, chunk_t,
private_tcg_pts_attr_req_func_comp_evid_t *this)
{
return this->value;
}
METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
private_tcg_pts_attr_req_func_comp_evid_t *this)
{
return this->noskip_flag;
}
METHOD(pa_tnc_attr_t, set_noskip_flag,void,
private_tcg_pts_attr_req_func_comp_evid_t *this, bool noskip)
{
this->noskip_flag = noskip;
}
METHOD(pa_tnc_attr_t, build, void,
private_tcg_pts_attr_req_func_comp_evid_t *this)
{
bio_writer_t *writer;
enumerator_t *enumerator;
entry_t *entry;
if (this->value.ptr)
{
return;
}
writer = bio_writer_create(PTS_REQ_FUNC_COMP_EVID_SIZE);
enumerator = this->list->create_enumerator(this->list);
while (enumerator->enumerate(enumerator, &entry))
{
writer->write_uint8 (writer, entry->flags);
writer->write_uint24(writer, entry->depth);
writer->write_uint24(writer, entry->name->get_vendor_id(entry->name));
writer->write_uint8 (writer, entry->name->get_qualifier(entry->name));
writer->write_uint32(writer, entry->name->get_name(entry->name));
}
enumerator->destroy(enumerator);
this->value = writer->extract_buf(writer);
this->length = this->value.len;
writer->destroy(writer);
}
METHOD(pa_tnc_attr_t, process, status_t,
private_tcg_pts_attr_req_func_comp_evid_t *this, uint32_t *offset)
{
bio_reader_t *reader;
uint32_t depth, vendor_id, name;
uint8_t flags, fam_and_qualifier, qualifier;
status_t status = FAILED;
entry_t *entry = NULL;
*offset = 0;
if (this->value.len < this->length)
{
return NEED_MORE;
}
if (this->value.len < PTS_REQ_FUNC_COMP_EVID_SIZE)
{
DBG1(DBG_TNC, "insufficient data for Request Functional "
"Component Evidence");
return FAILED;
}
reader = bio_reader_create(this->value);
while (reader->remaining(reader))
{
if (!reader->read_uint8(reader, &flags))
{
DBG1(DBG_TNC, "insufficient data for PTS Request Functional "
"Component Evidence Flags");
goto end;
}
if (!reader->read_uint24(reader, &depth))
{
DBG1(DBG_TNC, "insufficient data for PTS Request Functional "
"Component Evidence Sub Component Depth");
goto end;
}
if (!reader->read_uint24(reader, &vendor_id))
{
DBG1(DBG_TNC, "insufficient data for PTS Request Functional "
"Component Evidence Component Name Vendor ID");
goto end;
}
if (!reader->read_uint8(reader, &fam_and_qualifier))
{
DBG1(DBG_TNC, "insufficient data for PTS Request Functional "
"Component Evidence Family and Qualifier");
goto end;
}
if (fam_and_qualifier & PTS_REQ_FUNC_COMP_FAMILY_MASK)
{
DBG1(DBG_TNC, "the Functional Name Encoding Family "
"is not Binary Enumeration");
goto end;
}
if (!reader->read_uint32(reader, &name))
{
DBG1(DBG_TNC, "insufficient data for PTS Request Functional "
"Component Evidence Component Functional Name");
goto end;
}
qualifier = fam_and_qualifier & ~PTS_REQ_FUNC_COMP_FAMILY_MASK;
entry = malloc_thing(entry_t);
entry->flags = flags;
entry->depth = depth;
entry->name = pts_comp_func_name_create(vendor_id, name, qualifier);
this->list->insert_last(this->list, entry);
}
status = SUCCESS;
end:
reader->destroy(reader);
return status;
}
METHOD(pa_tnc_attr_t, add_segment, void,
private_tcg_pts_attr_req_func_comp_evid_t *this, chunk_t segment)
{
this->value = chunk_cat("mc", this->value, segment);
}
METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
private_tcg_pts_attr_req_func_comp_evid_t *this)
{
ref_get(&this->ref);
return &this->public.pa_tnc_attribute;
}
METHOD(pa_tnc_attr_t, destroy, void,
private_tcg_pts_attr_req_func_comp_evid_t *this)
{
if (ref_put(&this->ref))
{
this->list->destroy_function(this->list, (void *)free_entry);
free(this->value.ptr);
free(this);
}
}
METHOD(tcg_pts_attr_req_func_comp_evid_t, add_component, void,
private_tcg_pts_attr_req_func_comp_evid_t *this, uint8_t flags,
uint32_t depth, pts_comp_func_name_t *name)
{
entry_t *entry;
entry = malloc_thing(entry_t);
entry->flags = flags;
entry->depth = depth;
entry->name = name->clone(name);
this->list->insert_last(this->list, entry);
}
METHOD(tcg_pts_attr_req_func_comp_evid_t, get_count, int,
private_tcg_pts_attr_req_func_comp_evid_t *this)
{
return this->list->get_count(this->list);
}
METHOD(tcg_pts_attr_req_func_comp_evid_t, create_enumerator, enumerator_t*,
private_tcg_pts_attr_req_func_comp_evid_t *this)
{
return enumerator_create_filter(this->list->create_enumerator(this->list),
entry_filter, NULL, NULL);
}
/**
* Described in header.
*/
pa_tnc_attr_t *tcg_pts_attr_req_func_comp_evid_create(void)
{
private_tcg_pts_attr_req_func_comp_evid_t *this;
INIT(this,
.public = {
.pa_tnc_attribute = {
.get_type = _get_type,
.get_value = _get_value,
.get_noskip_flag = _get_noskip_flag,
.set_noskip_flag = _set_noskip_flag,
.build = _build,
.process = _process,
.add_segment = _add_segment,
.get_ref = _get_ref,
.destroy = _destroy,
},
.add_component = _add_component,
.get_count = _get_count,
.create_enumerator = _create_enumerator,
},
.type = { PEN_TCG, TCG_PTS_REQ_FUNC_COMP_EVID },
.list = linked_list_create(),
.ref = 1,
);
return &this->public.pa_tnc_attribute;
}
/**
* Described in header.
*/
pa_tnc_attr_t *tcg_pts_attr_req_func_comp_evid_create_from_data(size_t length,
chunk_t data)
{
private_tcg_pts_attr_req_func_comp_evid_t *this;
INIT(this,
.public = {
.pa_tnc_attribute = {
.get_type = _get_type,
.get_value = _get_value,
.get_noskip_flag = _get_noskip_flag,
.set_noskip_flag = _set_noskip_flag,
.build = _build,
.process = _process,
.add_segment = _add_segment,
.get_ref = _get_ref,
.destroy = _destroy,
},
.add_component = _add_component,
.get_count = _get_count,
.create_enumerator = _create_enumerator,
},
.type = { PEN_TCG, TCG_PTS_REQ_FUNC_COMP_EVID },
.length = length,
.list = linked_list_create(),
.value = chunk_clone(data),
.ref = 1,
);
return &this->public.pa_tnc_attribute;
}
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