10825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville/* 20825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * Copyright (C) 2006 The Android Open Source Project 30825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * 40825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * Licensed under the Apache License, Version 2.0 (the "License"); 50825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * you may not use this file except in compliance with the License. 60825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * You may obtain a copy of the License at 70825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * 80825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * http://www.apache.org/licenses/LICENSE-2.0 90825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * 100825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * Unless required by applicable law or agreed to in writing, software 110825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * distributed under the License is distributed on an "AS IS" BASIS, 120825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 130825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * See the License for the specific language governing permissions and 140825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * limitations under the License. 150825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville */ 160825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 170825495a331bb44df395a0cdb79fab85e68db5d5Wink Savillepackage com.android.internal.telephony.gsm; 180825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 190825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville/** 200825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * SIM Tag-Length-Value record 210825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * TS 102 223 Annex C 220825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * 230825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * {@hide} 240825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * 250825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville */ 260825495a331bb44df395a0cdb79fab85e68db5d5Wink Savillepublic class SimTlv 270825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville{ 280825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville //***** Private Instance Variables 290825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 3022d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville byte mRecord[]; 3122d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville int mTlvOffset; 3222d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville int mTlvLength; 3322d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville int mCurOffset; 3422d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville int mCurDataOffset; 3522d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville int mCurDataLength; 3622d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville boolean mHasValidTlvObject; 370825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 380825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville public SimTlv(byte[] record, int offset, int length) { 3922d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mRecord = record; 400825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 4122d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mTlvOffset = offset; 4222d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mTlvLength = length; 4322d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mCurOffset = offset; 440825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 4522d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mHasValidTlvObject = parseCurrentTlvObject(); 460825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } 470825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 480825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville public boolean nextObject() { 4922d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville if (!mHasValidTlvObject) return false; 5022d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mCurOffset = mCurDataOffset + mCurDataLength; 5122d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mHasValidTlvObject = parseCurrentTlvObject(); 5222d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville return mHasValidTlvObject; 530825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } 540825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 550825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville public boolean isValidObject() { 5622d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville return mHasValidTlvObject; 570825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } 580825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 590825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville /** 600825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * Returns the tag for the current TLV object 610825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * Return 0 if !isValidObject() 620825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * 0 and 0xff are invalid tag values 630825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * valid tags range from 1 - 0xfe 640825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville */ 650825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville public int getTag() { 6622d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville if (!mHasValidTlvObject) return 0; 6722d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville return mRecord[mCurOffset] & 0xff; 680825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } 690825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 700825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville /** 710825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * Returns data associated with current TLV object 720825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * returns null if !isValidObject() 730825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville */ 740825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 750825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville public byte[] getData() { 7622d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville if (!mHasValidTlvObject) return null; 770825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 7822d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville byte[] ret = new byte[mCurDataLength]; 7922d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville System.arraycopy(mRecord, mCurDataOffset, ret, 0, mCurDataLength); 800825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville return ret; 810825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } 820825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 830825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville /** 840825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * Updates curDataLength and curDataOffset 850825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville * @return false on invalid record, true on valid record 860825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville */ 870825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 880825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville private boolean parseCurrentTlvObject() { 890825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville // 0x00 and 0xff are invalid tag values 900825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 910825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville try { 9222d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville if (mRecord[mCurOffset] == 0 || (mRecord[mCurOffset] & 0xff) == 0xff) { 930825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville return false; 940825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } 950825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 9622d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville if ((mRecord[mCurOffset + 1] & 0xff) < 0x80) { 970825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville // one byte length 0 - 0x7f 9822d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mCurDataLength = mRecord[mCurOffset + 1] & 0xff; 9922d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mCurDataOffset = mCurOffset + 2; 10022d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville } else if ((mRecord[mCurOffset + 1] & 0xff) == 0x81) { 1010825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville // two byte length 0x80 - 0xff 10222d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mCurDataLength = mRecord[mCurOffset + 2] & 0xff; 10322d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville mCurDataOffset = mCurOffset + 3; 1040825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } else { 1050825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville return false; 1060825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } 1070825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } catch (ArrayIndexOutOfBoundsException ex) { 1080825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville return false; 1090825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } 1100825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 11122d85a8e3a575a6d01d2c788587971657dfe20c6Wink Saville if (mCurDataLength + mCurDataOffset > mTlvOffset + mTlvLength) { 1120825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville return false; 1130825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } 1140825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 1150825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville return true; 1160825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville } 1170825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville 1180825495a331bb44df395a0cdb79fab85e68db5d5Wink Saville} 119