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