93 lines
3.8 KiB
Java
93 lines
3.8 KiB
Java
/*
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* Copyright (C) 2018 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.operations;
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import java.io.IOException;
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import org.sufficientlysecure.keychain.securitytoken.CardException;
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import org.sufficientlysecure.keychain.securitytoken.CommandApdu;
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import org.sufficientlysecure.keychain.securitytoken.ResponseApdu;
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import org.sufficientlysecure.keychain.securitytoken.SecurityTokenConnection;
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public class ResetAndWipeTokenOp {
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private static final byte[] INVALID_PIN = "XXXXXXXXXXX".getBytes();
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private final SecurityTokenConnection connection;
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public static ResetAndWipeTokenOp create(SecurityTokenConnection connection) {
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return new ResetAndWipeTokenOp(connection);
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}
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private ResetAndWipeTokenOp(SecurityTokenConnection connection) {
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this.connection = connection;
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}
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/**
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* Resets security token, which deletes all keys and data objects.
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* This works by entering a wrong PIN and then Admin PIN 4 times respectively.
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* Afterwards, the token is reactivated.
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*/
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public void resetAndWipeToken() throws IOException {
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exhausePw1Tries();
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exhaustPw3Tries();
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// secure messaging must be disabled before reactivation
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connection.clearSecureMessaging();
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// NOTE: keep the order here! First execute _both_ reactivate commands. Before checking _both_ responses
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// If a token is in a bad state and reactivate1 fails, it could still be reactivated with reactivate2
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CommandApdu reactivate1 = connection.getCommandFactory().createReactivate1Command();
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connection.communicate(reactivate1);
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CommandApdu reactivate2 = connection.getCommandFactory().createReactivate2Command();
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ResponseApdu response2 = connection.communicate(reactivate2);
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if (!response2.isSuccess()) {
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throw new CardException("Reactivating failed!", response2.getSw());
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}
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connection.refreshConnectionCapabilities();
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}
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private void exhausePw1Tries() throws IOException {
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CommandApdu verifyPw1ForSignatureCommand =
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connection.getCommandFactory().createVerifyPw1ForSignatureCommand(INVALID_PIN);
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int pw1TriesLeft = Math.max(3, connection.getOpenPgpCapabilities().getPw1TriesLeft());
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for (int i = 0; i < pw1TriesLeft; i++) {
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ResponseApdu response = connection.communicate(verifyPw1ForSignatureCommand);
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if (response.isSuccess()) {
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throw new CardException("Should never happen, PIN XXXXXXXX has been accepted!", response.getSw());
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}
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}
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}
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private void exhaustPw3Tries() throws IOException {
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CommandApdu verifyPw3Command = connection.getCommandFactory().createVerifyPw3Command(INVALID_PIN);
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int pw3TriesLeft = Math.max(3, connection.getOpenPgpCapabilities().getPw3TriesLeft());
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for (int i = 0; i < pw3TriesLeft; i++) {
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ResponseApdu response = connection.communicate(verifyPw3Command);
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if (response.isSuccess()) { // Should NOT accept!
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throw new CardException("Should never happen, PIN XXXXXXXX has been accepted!", response.getSw());
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}
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}
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}
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}
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