19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage com.android.internal.telephony.gsm; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * SIM Tag-Length-Value record 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * TS 102 223 Annex C 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@hide} 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class SimTlv 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //***** Private Instance Variables 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byte record[]; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int tlvOffset; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int tlvLength; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curOffset; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curDataOffset; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curDataLength; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean hasValidTlvObject; 3704e71b3db84fd5f7fc4eefb49a33154ea91ec9fcWink Saville 3804e71b3db84fd5f7fc4eefb49a33154ea91ec9fcWink Saville public SimTlv(byte[] record, int offset, int length) { 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this.record = record; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this.tlvOffset = offset; 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this.tlvLength = length; 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curOffset = offset; 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project hasValidTlvObject = parseCurrentTlvObject(); 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4804e71b3db84fd5f7fc4eefb49a33154ea91ec9fcWink Saville public boolean nextObject() { 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!hasValidTlvObject) return false; 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curOffset = curDataOffset + curDataLength; 5104e71b3db84fd5f7fc4eefb49a33154ea91ec9fcWink Saville hasValidTlvObject = parseCurrentTlvObject(); 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return hasValidTlvObject; 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5504e71b3db84fd5f7fc4eefb49a33154ea91ec9fcWink Saville public boolean isValidObject() { 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return hasValidTlvObject; 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the tag for the current TLV object 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Return 0 if !isValidObject() 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 0 and 0xff are invalid tag values 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * valid tags range from 1 - 0xfe 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6504e71b3db84fd5f7fc4eefb49a33154ea91ec9fcWink Saville public int getTag() { 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!hasValidTlvObject) return 0; 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return record[curOffset] & 0xff; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns data associated with current TLV object 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returns null if !isValidObject() 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7404e71b3db84fd5f7fc4eefb49a33154ea91ec9fcWink Saville 7504e71b3db84fd5f7fc4eefb49a33154ea91ec9fcWink Saville public byte[] getData() { 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!hasValidTlvObject) return null; 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byte[] ret = new byte[curDataLength]; 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(record, curDataOffset, ret, 0, curDataLength); 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return ret; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Updates curDataLength and curDataOffset 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return false on invalid record, true on valid record 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8804e71b3db84fd5f7fc4eefb49a33154ea91ec9fcWink Saville private boolean parseCurrentTlvObject() { 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 0x00 and 0xff are invalid tag values 9004e71b3db84fd5f7fc4eefb49a33154ea91ec9fcWink Saville 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 9234efc39f256d5833687c7bd7d83258d6394c9307Jaikumar Ganesh if (record[curOffset] == 0 || (record[curOffset] & 0xff) == 0xff) { 9334efc39f256d5833687c7bd7d83258d6394c9307Jaikumar Ganesh return false; 9434efc39f256d5833687c7bd7d83258d6394c9307Jaikumar Ganesh } 9534efc39f256d5833687c7bd7d83258d6394c9307Jaikumar Ganesh 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((record[curOffset + 1] & 0xff) < 0x80) { 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // one byte length 0 - 0x7f 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curDataLength = record[curOffset + 1] & 0xff; 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curDataOffset = curOffset + 2; 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if ((record[curOffset + 1] & 0xff) == 0x81) { 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // two byte length 0x80 - 0xff 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curDataLength = record[curOffset + 2] & 0xff; 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curDataOffset = curOffset + 3; 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (ArrayIndexOutOfBoundsException ex) { 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (curDataLength + curDataOffset > tlvOffset + tlvLength) { 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 119