106 lines
3.8 KiB
Java
106 lines
3.8 KiB
Java
/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.securitytoken;
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import org.sufficientlysecure.keychain.securitytoken.usb.UsbTransportException;
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import org.sufficientlysecure.keychain.securitytoken.SecurityTokenInfo.TokenType;
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import java.nio.ByteBuffer;
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import java.util.Arrays;
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@SuppressWarnings("WeakerAccess")
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class CardCapabilities {
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private static final int MASK_CHAINING = 1 << 7;
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private static final int MASK_EXTENDED = 1 << 6;
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private static final int STATUS_INDICATOR_NO_INFORMATION = 0x00;
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private static final int STATUS_INDICATOR_INITIALISATION_STATE = 0x03;
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private static final int STATUS_INDICATOR_OPERATIONAL_STATE = 0x05;
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private static final byte[] EXPECTED_PROCESSING_STATUS_BYTES = {(byte) 0x90, (byte) 0x00};
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private byte[] historicalBytes;
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private byte[] capabilityBytes;
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private TokenType tokenType;
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public CardCapabilities(byte[] historicalBytes, TokenType tokenType) throws UsbTransportException {
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if ((historicalBytes == null) || (historicalBytes[0] != 0x00)) {
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throw new UsbTransportException("Invalid historical bytes category indicator byte");
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}
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this.historicalBytes = historicalBytes;
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capabilityBytes = getCapabilitiesBytes(historicalBytes);
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this.tokenType = tokenType;
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}
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public CardCapabilities() {
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capabilityBytes = null;
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}
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private static byte[] getCapabilitiesBytes(byte[] historicalBytes) {
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// Compact TLV
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ByteBuffer byteBuffer = ByteBuffer.wrap(historicalBytes, 1, historicalBytes.length - 2);
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while (byteBuffer.hasRemaining()) {
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byte tl = byteBuffer.get();
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if (tl == 0x73) { // Capabilities TL
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byte[] val = new byte[3];
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byteBuffer.get(val);
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return val;
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}
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byteBuffer.position(byteBuffer.position() + (tl & 0xF));
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}
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return null;
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}
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public boolean hasChaining() {
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return capabilityBytes != null && (capabilityBytes[2] & MASK_CHAINING) != 0;
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}
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public boolean hasExtended() {
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return capabilityBytes != null && (capabilityBytes[2] & MASK_EXTENDED) != 0;
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}
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public boolean hasLifeCycleManagement() throws UsbTransportException {
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byte[] lastBytes = Arrays.copyOfRange(historicalBytes, historicalBytes.length - 2, historicalBytes.length);
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boolean hasExpectedLastBytes = Arrays.equals(lastBytes, EXPECTED_PROCESSING_STATUS_BYTES);
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// Yk neo simply ends with 0x0000
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if (!hasExpectedLastBytes) {
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return true;
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}
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if (tokenType == TokenType.SECALOT) {
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return true;
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}
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int statusIndicatorByte = historicalBytes[historicalBytes.length - 3];
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switch (statusIndicatorByte) {
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case STATUS_INDICATOR_NO_INFORMATION: {
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return false;
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}
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case STATUS_INDICATOR_INITIALISATION_STATE:
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case STATUS_INDICATOR_OPERATIONAL_STATE: {
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return true;
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}
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default: {
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throw new UsbTransportException("Status indicator byte not specified in OpenPGP specification");
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}
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}
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}
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}
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