96 lines
3.7 KiB
Java
96 lines
3.7 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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import org.sufficientlysecure.keychain.util.Passphrase;
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public class ModifyPinTokenOp {
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private static final int MIN_PW3_LENGTH = 8;
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private final SecurityTokenConnection connection;
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private final Passphrase adminPin;
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public static ModifyPinTokenOp create(SecurityTokenConnection connection, Passphrase adminPin) {
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return new ModifyPinTokenOp(connection, adminPin);
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}
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private ModifyPinTokenOp(SecurityTokenConnection connection,
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Passphrase adminPin) {
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this.connection = connection;
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this.adminPin = adminPin;
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}
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public void modifyPw1andPw3Pins(byte[] newPin, byte[] newAdminPin) throws IOException {
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// Order is important for Gnuk, otherwise it will be set up in "admin less mode".
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// http://www.fsij.org/doc-gnuk/gnuk-passphrase-setting.html#set-up-pw1-pw3-and-reset-code
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modifyPw3Pin(newAdminPin);
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modifyPw1PinWithEffectiveAdminPin(new Passphrase(new String(newAdminPin)), newPin);
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}
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public void modifyPw1Pin(byte[] newPin) throws IOException {
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modifyPw1PinWithEffectiveAdminPin(adminPin, newPin);
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}
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private void modifyPw1PinWithEffectiveAdminPin(Passphrase effectiveAdminPin, byte[] newPin) throws IOException {
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connection.verifyAdminPin(effectiveAdminPin);
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int maxPw1Length = connection.getOpenPgpCapabilities().getPw3MaxLength();
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if (newPin.length < 6 || newPin.length > maxPw1Length) {
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throw new IOException("Invalid PIN length");
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}
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CommandApdu changePin = connection.getCommandFactory().createResetPw1Command(newPin);
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ResponseApdu response = connection.communicate(changePin);
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if (!response.isSuccess()) {
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throw new CardException("Failed to change PIN", response.getSw());
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}
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}
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/**
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* Modifies the user's PW3. Before sending, the new PIN will be validated for
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* conformance to the token's requirements for key length.
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*/
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private void modifyPw3Pin(byte[] newAdminPin) throws IOException {
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int maxPw3Length = connection.getOpenPgpCapabilities().getPw3MaxLength();
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if (newAdminPin.length < MIN_PW3_LENGTH || newAdminPin.length > maxPw3Length) {
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throw new IOException("Invalid PIN length");
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}
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byte[] pin = adminPin.toStringUnsafe().getBytes();
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CommandApdu changePin = connection.getCommandFactory().createChangePw3Command(pin, newAdminPin);
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ResponseApdu response = connection.communicate(changePin);
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connection.invalidatePw3();
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if (!response.isSuccess()) {
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throw new CardException("Failed to change PIN", response.getSw());
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}
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}
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}
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