161 lines
4.8 KiB
Java
161 lines
4.8 KiB
Java
/*
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* Copyright (C) 2016 Nikita Mikhailov <nikita.s.mikhailov@gmail.com>
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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 java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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public class OpenPgpCapabilities {
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private final static int MASK_SM = 1 << 7;
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private final static int MASK_KEY_IMPORT = 1 << 5;
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private final static int MASK_ATTRIBUTES_CHANGABLE = 1 << 2;
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private boolean mPw1ValidForMultipleSignatures;
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private byte[] mAid;
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private byte[] mHistoricalBytes;
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private boolean mHasSM;
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private boolean mAttriburesChangable;
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private boolean mHasKeyImport;
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private int mSMType;
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private int mMaxCmdLen;
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private int mMaxRspLen;
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private Map<KeyType, KeyFormat> mKeyFormats;
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public OpenPgpCapabilities(byte[] data) throws IOException {
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mKeyFormats = new HashMap<>();
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updateWithData(data);
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}
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public void updateWithData(byte[] data) throws IOException {
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Iso7816TLV[] tlvs = Iso7816TLV.readList(data, true);
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if (tlvs.length == 1 && tlvs[0].mT == 0x6E) {
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tlvs = ((Iso7816TLV.Iso7816CompositeTLV) tlvs[0]).mSubs;
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}
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for (Iso7816TLV tlv : tlvs) {
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switch (tlv.mT) {
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case 0x4F:
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mAid = tlv.mV;
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break;
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case 0x5F52:
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mHistoricalBytes = tlv.mV;
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break;
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case 0x73:
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parseDdo((Iso7816TLV.Iso7816CompositeTLV) tlv);
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break;
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case 0xC0:
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parseExtendedCaps(tlv.mV);
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break;
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case 0xC1:
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mKeyFormats.put(KeyType.SIGN, KeyFormat.fromBytes(tlv.mV));
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break;
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case 0xC2:
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mKeyFormats.put(KeyType.ENCRYPT, KeyFormat.fromBytes(tlv.mV));
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break;
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case 0xC3:
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mKeyFormats.put(KeyType.AUTH, KeyFormat.fromBytes(tlv.mV));
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break;
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case 0xC4:
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mPw1ValidForMultipleSignatures = tlv.mV[0] == 1;
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break;
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}
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}
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}
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private void parseDdo(Iso7816TLV.Iso7816CompositeTLV tlvs) {
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for (Iso7816TLV tlv : tlvs.mSubs) {
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switch (tlv.mT) {
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case 0xC0:
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parseExtendedCaps(tlv.mV);
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break;
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case 0xC1:
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mKeyFormats.put(KeyType.SIGN, KeyFormat.fromBytes(tlv.mV));
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break;
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case 0xC2:
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mKeyFormats.put(KeyType.ENCRYPT, KeyFormat.fromBytes(tlv.mV));
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break;
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case 0xC3:
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mKeyFormats.put(KeyType.AUTH, KeyFormat.fromBytes(tlv.mV));
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break;
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case 0xC4:
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mPw1ValidForMultipleSignatures = tlv.mV[0] == 1;
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break;
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}
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}
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}
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private void parseExtendedCaps(byte[] v) {
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mHasSM = (v[0] & MASK_SM) != 0;
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mHasKeyImport = (v[0] & MASK_KEY_IMPORT) != 0;
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mAttriburesChangable = (v[0] & MASK_ATTRIBUTES_CHANGABLE) != 0;
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mSMType = v[1];
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mMaxCmdLen = (v[6] << 8) + v[7];
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mMaxRspLen = (v[8] << 8) + v[9];
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}
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public boolean isPw1ValidForMultipleSignatures() {
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return mPw1ValidForMultipleSignatures;
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}
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public byte[] getAid() {
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return mAid;
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}
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public byte[] getHistoricalBytes() {
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return mHistoricalBytes;
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}
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public boolean isHasSM() {
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return mHasSM;
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}
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public boolean isAttributesChangable() {
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return mAttriburesChangable;
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}
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public boolean isHasKeyImport() {
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return mHasKeyImport;
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}
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public boolean isHasAESSM() {
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return isHasSM() && ((mSMType == 1) || (mSMType == 2));
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}
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public boolean isHasSCP11bSM() {
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return isHasSM() && (mSMType == 3);
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}
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public int getMaxCmdLen() {
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return mMaxCmdLen;
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}
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public int getMaxRspLen() {
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return mMaxRspLen;
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}
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public KeyFormat getFormatForKeyType(KeyType keyType) {
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return mKeyFormats.get(keyType);
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}
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}
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