350 lines
9.0 KiB
C
350 lines
9.0 KiB
C
/*
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* Copyright (C) 2011-2012 Sansar Choinyambuu, Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "tcg_pts_attr_unix_file_meta.h"
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#include <pa_tnc/pa_tnc_msg.h>
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#include <bio/bio_writer.h>
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#include <bio/bio_reader.h>
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#include <collections/linked_list.h>
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#include <utils/debug.h>
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#include <string.h>
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typedef struct private_tcg_pts_attr_file_meta_t private_tcg_pts_attr_file_meta_t;
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/**
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* Unix-Style File Metadata
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* see section 3.17.3 of PTS Protocol: Binding to TNC IF-M Specification
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*
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* 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Number of Files included |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Number of Files included |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | File metadata Length | Type | Reserved |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | File Size |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | File Size |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | File Create Time |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | File Create Time |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Last Modify Time |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Last Modify Time |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Last Access Time |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Last Access Time |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | File Owner ID |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | File Owner ID |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | File Group ID |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | File Group ID |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* ~ Filename (Variable Length) ~
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* ...........................
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*/
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#define PTS_FILE_META_SIZE 8
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#define PTS_FILE_MEAS_RESERVED 0x00
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#define PTS_FILE_METADATA_SIZE 52
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/**
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* Private data of an tcg_pts_attr_file_meta_t object.
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*/
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struct private_tcg_pts_attr_file_meta_t {
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/**
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* Public members of tcg_pts_attr_file_meta_t
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*/
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tcg_pts_attr_file_meta_t public;
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/**
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* Vendor-specific attribute type
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*/
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pen_type_t type;
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/**
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* Attribute value
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*/
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chunk_t value;
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/**
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* Noskip flag
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*/
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bool noskip_flag;
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/**
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* PTS File Metadata
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*/
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pts_file_meta_t *metadata;
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/**
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* Reference count
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*/
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refcount_t ref;
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};
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METHOD(pa_tnc_attr_t, get_type, pen_type_t,
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private_tcg_pts_attr_file_meta_t *this)
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{
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return this->type;
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}
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METHOD(pa_tnc_attr_t, get_value, chunk_t,
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private_tcg_pts_attr_file_meta_t *this)
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{
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return this->value;
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}
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METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
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private_tcg_pts_attr_file_meta_t *this)
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{
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return this->noskip_flag;
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}
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METHOD(pa_tnc_attr_t, set_noskip_flag,void,
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private_tcg_pts_attr_file_meta_t *this, bool noskip)
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{
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this->noskip_flag = noskip;
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}
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METHOD(pa_tnc_attr_t, build, void,
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private_tcg_pts_attr_file_meta_t *this)
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{
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bio_writer_t *writer;
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enumerator_t *enumerator;
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pts_file_metadata_t *entry;
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u_int64_t number_of_files;
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if (this->value.ptr)
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{
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return;
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}
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number_of_files = this->metadata->get_file_count(this->metadata);
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writer = bio_writer_create(PTS_FILE_META_SIZE);
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writer->write_uint64(writer, number_of_files);
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enumerator = this->metadata->create_enumerator(this->metadata);
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while (enumerator->enumerate(enumerator, &entry))
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{
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writer->write_uint16(writer, PTS_FILE_METADATA_SIZE +
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strlen(entry->filename));
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writer->write_uint8 (writer, entry->type);
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writer->write_uint8 (writer, PTS_FILE_MEAS_RESERVED);
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writer->write_uint64(writer, entry->filesize);
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writer->write_uint64(writer, entry->created);
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writer->write_uint64(writer, entry->modified);
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writer->write_uint64(writer, entry->accessed);
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writer->write_uint64(writer, entry->owner);
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writer->write_uint64(writer, entry->group);
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writer->write_data (writer, chunk_create(entry->filename,
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strlen(entry->filename)));
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}
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enumerator->destroy(enumerator);
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this->value = chunk_clone(writer->get_buf(writer));
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writer->destroy(writer);
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}
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METHOD(pa_tnc_attr_t, process, status_t,
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private_tcg_pts_attr_file_meta_t *this, u_int32_t *offset)
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{
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bio_reader_t *reader;
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pts_file_metadata_t *entry;
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u_int8_t type, reserved;
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u_int16_t len;
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u_int64_t number_of_files, filesize, created, modified, accessed;
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u_int64_t owner, group;
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chunk_t filename;
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status_t status = FAILED;
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if (this->value.len < PTS_FILE_META_SIZE)
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{
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DBG1(DBG_TNC, "insufficient data for PTS Unix-Style file metadata header");
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*offset = 0;
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return FAILED;
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}
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reader = bio_reader_create(this->value);
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reader->read_uint64(reader, &number_of_files);
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this->metadata = pts_file_meta_create();
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while (number_of_files--)
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{
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if (!reader->read_uint16(reader, &len))
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{
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DBG1(DBG_TNC, "insufficient data for PTS file metadata length");
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goto end;
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}
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if (!reader->read_uint8(reader, &type))
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{
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DBG1(DBG_TNC, "insufficient data for file type");
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goto end;
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}
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if (!reader->read_uint8(reader, &reserved))
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{
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DBG1(DBG_TNC, "insufficient data for reserved field");
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goto end;
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}
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if (!reader->read_uint64(reader, &filesize))
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{
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DBG1(DBG_TNC, "insufficient data for file size");
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goto end;
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}
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if (!reader->read_uint64(reader, &created))
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{
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DBG1(DBG_TNC, "insufficient data for file create time");
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goto end;
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}
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if (!reader->read_uint64(reader, &modified))
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{
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DBG1(DBG_TNC, "insufficient data for last modify time");
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goto end;
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}
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if (!reader->read_uint64(reader, &accessed))
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{
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DBG1(DBG_TNC, "insufficient data for last access time");
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goto end;
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}
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if (!reader->read_uint64(reader, &owner))
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{
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DBG1(DBG_TNC, "insufficient data for owner id");
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goto end;
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}
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if (!reader->read_uint64(reader, &group))
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{
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DBG1(DBG_TNC, "insufficient data for group id");
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goto end;
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}
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if (!reader->read_data(reader, len - PTS_FILE_METADATA_SIZE, &filename))
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{
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DBG1(DBG_TNC, "insufficient data for filename");
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goto end;
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}
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entry = malloc_thing(pts_file_metadata_t);
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entry->type = type;
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entry->filesize = filesize;
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entry->created = created;
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entry->modified = modified;
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entry->accessed = accessed;
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entry->owner = owner;
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entry->group = group;
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entry->filename = strndup(filename.ptr, filename.len);
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this->metadata->add(this->metadata, entry);
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}
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status = SUCCESS;
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end:
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reader->destroy(reader);
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return status;
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}
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METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
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private_tcg_pts_attr_file_meta_t *this)
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{
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ref_get(&this->ref);
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return &this->public.pa_tnc_attribute;
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}
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METHOD(pa_tnc_attr_t, destroy, void,
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private_tcg_pts_attr_file_meta_t *this)
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{
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if (ref_put(&this->ref))
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{
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DESTROY_IF(this->metadata);
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free(this->value.ptr);
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free(this);
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}
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}
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METHOD(tcg_pts_attr_file_meta_t, get_metadata, pts_file_meta_t*,
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private_tcg_pts_attr_file_meta_t *this)
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{
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return this->metadata;
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}
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/**
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* Described in header.
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*/
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pa_tnc_attr_t *tcg_pts_attr_unix_file_meta_create(pts_file_meta_t *metadata)
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{
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private_tcg_pts_attr_file_meta_t *this;
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INIT(this,
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.public = {
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.pa_tnc_attribute = {
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.get_type = _get_type,
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.get_value = _get_value,
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.get_noskip_flag = _get_noskip_flag,
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.set_noskip_flag = _set_noskip_flag,
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.build = _build,
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.process = _process,
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.get_ref = _get_ref,
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.destroy = _destroy,
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},
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.get_metadata = _get_metadata,
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},
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.type = { PEN_TCG, TCG_PTS_UNIX_FILE_META },
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.metadata = metadata,
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.ref = 1,
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);
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return &this->public.pa_tnc_attribute;
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}
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/**
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* Described in header.
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*/
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pa_tnc_attr_t *tcg_pts_attr_unix_file_meta_create_from_data(chunk_t data)
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{
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private_tcg_pts_attr_file_meta_t *this;
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INIT(this,
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.public = {
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.pa_tnc_attribute = {
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.get_type = _get_type,
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.get_value = _get_value,
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.get_noskip_flag = _get_noskip_flag,
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.set_noskip_flag = _set_noskip_flag,
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.build = _build,
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.process = _process,
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.get_ref = _get_ref,
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.destroy = _destroy,
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},
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.get_metadata = _get_metadata,
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},
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.type = { PEN_TCG, TCG_PTS_UNIX_FILE_META },
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.value = chunk_clone(data),
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.ref = 1,
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);
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return &this->public.pa_tnc_attribute;
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}
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