      1 /**
      2  *  ---------
      3  * |.##> <##.|  Open Smart Card Development Platform (www.openscdp.org)
      4  * |#       #|
      5  * |#       #|  Copyright (c) 1999-2018 CardContact Software & System Consulting
      6  * |'##> <##'|  Andreas Schwier, 32429 Minden, Germany (www.cardcontact.de)
      7  *  ---------
      8  *
      9  *  This file is part of OpenSCDP.
     10  *
     11  *  OpenSCDP is free software; you can redistribute it and/or modify
     12  *  it under the terms of the GNU General Public License version 2 as
     13  *  published by the Free Software Foundation.
     14  *
     15  *  OpenSCDP is distributed in the hope that it will be useful,
     16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     18  *  GNU General Public License for more details.
     19  *
     20  *  You should have received a copy of the GNU General Public License
     21  *  along with OpenSCDP; if not, write to the Free Software
     22  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
     23  *
     24  * @fileoverview Implementation of a ISO 7816-4 file system simulation
     25  */
     26
     27 var APDU                = require('scsh/cardsim/APDU').APDU;
     28 var FCP                 = require('scsh/cardsim/FCP').FCP;
     29 var FSNode              = require('scsh/cardsim/FSNode').FSNode;
     30
     31
     32
     33 /**
     34  * Create a file system node that represents a transparent EF
     35  *
     36  * @class Class implementing a transparent EF
     37  * @constructor
     38  * @param {FCP} fcp the FCP for this EF
     39  * @param {ByteString} contents the contents for this EF
     40  */
     41 function TransparentEF(fcp, contents) {
     42 	if (!(fcp instanceof FCP)) {
     43 		throw new GPError("TransparentEF", GPError.INVALID_TYPE, APDU.SW_GENERALERROR, "Argument 1 must be of type FCP");
     44 	}
     45
     46 	if ((typeof(contents) != "undefined") && (contents != null) && !(contents instanceof ByteString)) {
     47 		throw new GPError("TransparentEF", GPError.INVALID_TYPE, APDU.SW_GENERALERROR, "Argument 2 must be of type ByteString");
     48 	}
     49
     50 	FSNode.call(this, fcp);
     51 	this.content = contents;
     52 }
     53
     54 TransparentEF.prototype = new FSNode();
     55 TransparentEF.prototype.constructor = TransparentEF;
     56
     57 exports.TransparentEF = TransparentEF;
     58
     59
     60
     61 /**
     62  * Reads data from a transparent EF
     63  *
     64  * @param {APDU} apdu the APDU used for reading
     65  * @param {Number} offset the offset to read from
     66  * @param {Number} length the length in bytes or 0 for all in short APDU or 65536 for all in extended APDUs
     67  * @type ByteString
     68  * @return the data read
     69  */
     70 TransparentEF.prototype.readBinary = function(apdu, offset, length) {
     71 	if (typeof(offset) != "number") {
     72 		throw new GPError("TransparentEF", GPError.INVALID_TYPE, APDU.SW_GENERALERROR, "Offset must be type Number");
     73 	}
     74 	if (typeof(length) != "number") {
     75 		throw new GPError("TransparentEF", GPError.INVALID_TYPE, APDU.SW_GENERALERROR, "Length must be type Number");
     76 	}
     77
     78 	if (offset >= this.content.length) {
     79 		throw new GPError("TransparentEF", GPError.INVALID_DATA, APDU.SW_INCP1P2, "Offset out of range");
     80 	}
     81
     82 	var rlen = length;
     83 	if ((length == 0) || (length == 65536)) {
     84 		rlen = this.content.length - offset;
     85 		if ((length == 0) && (rlen > 256)) {
     86 			rlen = 256;
     87 		}
     88 	}
     89
     90 	if (offset + rlen > this.content.length) {
     91 		apdu.setSW(APDU.SW_EOF);
     92 		rlen = this.content.length - offset;
     93 	} else {
     94 		apdu.setSW(APDU.SW_OK);
     95 	}
     96
     97 	return this.content.bytes(offset, rlen);
     98 }
     99
    100
    101
    102 /**
    103  * Update data in transparent EF
    104  *
    105  * @param {APDU} apdu the APDU used for updating
    106  * @param {Number} offset the offset to update
    107  * @param {ByteString} data the data to write into the EF
    108  */
    109 TransparentEF.prototype.updateBinary = function(apdu, offset, data) {
    110 	if (typeof(offset) != "number") {
    111 		throw new GPError("TransparentEF", GPError.INVALID_TYPE, APDU.SW_GENERALERROR, "Offset must be type Number");
    112 	}
    113 	if ((typeof(data) != "object") || !(data instanceof ByteString)) {
    114 		throw new GPError("TransparentEF", GPError.INVALID_TYPE, APDU.SW_GENERALERROR, "Data must be a ByteString");
    115 	}
    116
    117 	if (offset + data.length > this.fcp.size) {
    118 		throw new GPError("TransparentEF", GPError.INVALID_DATA, APDU.SW_WRONGLENGTH, "Writing beyond file limit");
    119 	}
    120
    121 	if (this.content) {
    122 		if (offset > this.content.length) {
    123 			throw new GPError("TransparentEF", GPError.INVALID_DATA, APDU.SW_INCP1P2, "Offset out of range");
    124 		}
    125 		var newcontent = this.content.bytes(0, offset).concat(data);
    126 		if (this.content.length > newcontent.length) {
    127 			newcontent = newcontent.concat(this.content.bytes(newcontent.length));
    128 		}
    129 	} else {
    130 		if (offset > 0) {
    131 			throw new GPError("TransparentEF", GPError.INVALID_DATA, APDU.SW_INCP1P2, "Offset out of range");
    132 		}
    133 		var newcontent = data;
    134 	}
    135
    136 	this.content = newcontent;
    137 	apdu.setSW(APDU.SW_OK);
    138 }
    139