Initial commit
This commit is contained in:
Arnaud Fontaine
848
src/fr/anssi/smartpgp/PGPKey.java
Normal file
848
src/fr/anssi/smartpgp/PGPKey.java
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@@ -0,0 +1,848 @@
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/*
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SmartPGP : JavaCard implementation of OpenPGP card v3 specification
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https://github.com/ANSSI-FR/smartpgp
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Copyright (C) 2016 ANSSI
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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package fr.anssi.smartpgp;
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import javacard.framework.*;
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import javacard.security.*;
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import javacardx.apdu.*;
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import javacardx.crypto.*;
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public final class PGPKey {
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protected final Fingerprint fingerprint;
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protected final byte[] generation_date;
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protected final byte[] certificate;
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protected short certificate_length;
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protected final byte[] attributes;
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protected byte attributes_length;
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protected final boolean is_secure_messaging_key;
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private KeyPair keys;
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protected PGPKey(final boolean for_secure_messaging) {
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is_secure_messaging_key = for_secure_messaging;
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if(is_secure_messaging_key) {
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fingerprint = null;
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generation_date = null;
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} else {
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fingerprint = new Fingerprint();
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generation_date = new byte[Constants.GENERATION_DATE_SIZE];
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}
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certificate = new byte[Constants.cardholderCertificateMaxLength()];
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certificate_length = 0;
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attributes = new byte[Constants.ALGORITHM_ATTRIBUTES_MAX_LENGTH];
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attributes_length = 0;
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reset();
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}
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private final void resetKeys() {
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if(keys != null) {
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keys.getPrivate().clearKey();
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keys.getPublic().clearKey();
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keys = null;
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}
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if(certificate_length > 0) {
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certificate_length = (short)0;
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Util.arrayFillNonAtomic(certificate, (short)0, certificate_length, (byte)0);
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}
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if(!is_secure_messaging_key) {
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fingerprint.reset();
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Util.arrayFillNonAtomic(generation_date, (short)0, Constants.GENERATION_DATE_SIZE, (byte)0);
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}
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}
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protected final void reset() {
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resetKeys();
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JCSystem.beginTransaction();
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if(attributes_length > 0) {
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Util.arrayFillNonAtomic(attributes, (short)0, attributes_length, (byte)0);
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attributes_length = (byte)0;
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}
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if(is_secure_messaging_key) {
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Util.arrayCopyNonAtomic(Constants.ALGORITHM_ATTRIBUTES_DEFAULT_SECURE_MESSAGING, (short)0,
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attributes, (short)0,
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(short)Constants.ALGORITHM_ATTRIBUTES_DEFAULT_SECURE_MESSAGING.length);
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attributes_length = (byte)Constants.ALGORITHM_ATTRIBUTES_DEFAULT_SECURE_MESSAGING.length;
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} else {
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Util.arrayCopyNonAtomic(Constants.ALGORITHM_ATTRIBUTES_DEFAULT, (short)0,
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attributes, (short)0,
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(short)Constants.ALGORITHM_ATTRIBUTES_DEFAULT.length);
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attributes_length = (byte)Constants.ALGORITHM_ATTRIBUTES_DEFAULT.length;
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}
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JCSystem.commitTransaction();
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}
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protected final boolean isInitialized() {
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return (keys != null) && keys.getPrivate().isInitialized() && keys.getPublic().isInitialized();
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}
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protected final void setCertificate(final byte[] buf, final short off, final short len) {
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if((len < 0) ||
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(len > Constants.cardholderCertificateMaxLength())) {
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ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
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return;
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}
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JCSystem.beginTransaction();
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if(certificate_length > 0) {
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Util.arrayFillNonAtomic(certificate, (short)0, certificate_length, (byte)0);
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}
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Util.arrayCopyNonAtomic(buf, off, certificate, (short)0, len);
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certificate_length = len;
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JCSystem.commitTransaction();
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}
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protected final void setGenerationDate(final byte[] buf, final short off, final short len) {
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if(len != Constants.GENERATION_DATE_SIZE) {
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ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
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return;
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}
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Util.arrayCopy(buf, off, generation_date, (short)0, len);
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}
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protected final void setAttributes(final ECCurves ec,
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final byte[] buf, final short off, final short len) {
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if((len < Constants.ALGORITHM_ATTRIBUTES_MIN_LENGTH) ||
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(len > Constants.ALGORITHM_ATTRIBUTES_MAX_LENGTH)) {
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ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
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return;
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}
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switch(buf[0]) {
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case 0x01:
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if((len != 6) || is_secure_messaging_key) {
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ISOException.throwIt(ISO7816.SW_WRONG_DATA);
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return;
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}
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if((Util.getShort(buf, (short)1) < 2048) ||
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(Util.getShort(buf, (short)3) != 0x11) ||
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(buf[5] < 0) || (buf[5] > 3)) {
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ISOException.throwIt(ISO7816.SW_WRONG_DATA);
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return;
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}
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break;
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case 0x12:
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case 0x13:
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if(len < 2) {
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ISOException.throwIt(ISO7816.SW_WRONG_DATA);
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return;
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}
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final byte delta = (buf[(short)(len - 1)] == (byte)0xff) ? (byte)1 : (byte)0;
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final ECParams params = ec.findByOid(buf, (short)(off + 1), (byte)(len - 1 - delta));
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if(params == null) {
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ISOException.throwIt(ISO7816.SW_WRONG_DATA);
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return;
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}
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if(is_secure_messaging_key) {
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if((buf[0] != 0x12) ||
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(((short)(Constants.aesKeyLength()* 8) > (short)128) &&
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(params.nb_bits < 512))) {
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ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
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return;
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}
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}
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break;
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default:
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ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
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return;
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}
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resetKeys();
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JCSystem.beginTransaction();
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if(attributes_length > 0) {
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Util.arrayFillNonAtomic(attributes, (short)0, attributes_length, (byte)0);
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}
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Util.arrayCopyNonAtomic(buf, off, attributes, (short)0, len);
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attributes_length = (byte)len;
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JCSystem.commitTransaction();
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}
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protected final boolean isRsa() {
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return (attributes[0] == 1);
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}
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protected final short rsaModulusBitSize() {
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return Util.getShort(attributes, (short)1);
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}
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protected final short rsaExponentBitSize() {
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return Util.getShort(attributes, (short)3);
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}
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protected final boolean isEc() {
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return ((attributes[0] == (byte)0x12) ||
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(attributes[0] == (byte)0x13));
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}
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protected final ECParams ecParams(final ECCurves ec) {
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final byte delta = (attributes[(short)(attributes_length - 1)] == (byte)0xff) ? (byte)1 : (byte)0;
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return ec.findByOid(attributes, (short)1, (byte)(attributes_length - 1 - delta));
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}
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private final KeyPair generateRSA() {
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final PrivateKey priv = (PrivateKey)KeyBuilder.buildKey(KeyBuilder.TYPE_RSA_CRT_PRIVATE, rsaModulusBitSize(), false);
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final RSAPublicKey pub = (RSAPublicKey)KeyBuilder.buildKey(KeyBuilder.TYPE_RSA_PUBLIC, rsaModulusBitSize(), false);
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if((priv == null) || (pub == null)) {
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return null;
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}
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pub.setExponent(Constants.RSA_EXPONENT, (short)0, (byte)Constants.RSA_EXPONENT.length);
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return new KeyPair(pub, priv);
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}
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private final KeyPair generateEC(final ECCurves ec) {
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final ECParams params = ecParams(ec);
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final ECPrivateKey priv = (ECPrivateKey)KeyBuilder.buildKey(KeyBuilder.TYPE_EC_FP_PRIVATE, params.nb_bits, false);
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final ECPublicKey pub = (ECPublicKey)KeyBuilder.buildKey(KeyBuilder.TYPE_EC_FP_PUBLIC, params.nb_bits, false);
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if((priv == null) || (pub == null)) {
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return null;
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}
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params.setParams(priv);
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params.setParams(pub);
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return new KeyPair(pub, priv);
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}
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protected final void generate(final ECCurves ec) {
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KeyPair nkeys = null;
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if(isRsa()) {
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nkeys = generateRSA();
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} else if(isEc()) {
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nkeys = generateEC(ec);
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}
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if(nkeys == null) {
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ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
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return;
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}
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nkeys.genKeyPair();
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if(!nkeys.getPublic().isInitialized() || !nkeys.getPrivate().isInitialized()) {
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ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
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return;
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}
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resetKeys();
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keys = nkeys;
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}
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private final KeyPair importRSAKey(final byte[] buf,
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final short boff, final short len,
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final byte tag_count, final byte[] tag_val, final short[] tag_len) {
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final short attr_modulus_bit_size = rsaModulusBitSize();
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final short attr_modulus_byte_size = Common.bitsToBytes(attr_modulus_bit_size);
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final RSAPrivateCrtKey priv = (RSAPrivateCrtKey)KeyBuilder.buildKey(KeyBuilder.TYPE_RSA_CRT_PRIVATE, attr_modulus_bit_size, false);
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final RSAPublicKey pub = (RSAPublicKey)KeyBuilder.buildKey(KeyBuilder.TYPE_RSA_PUBLIC, attr_modulus_bit_size, false);
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if((priv == null) || (pub == null)) {
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return null;
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}
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short off = boff;
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byte i = 0;
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while(i < tag_count) {
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if((short)((short)(off - boff) + tag_len[i]) > len) {
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ISOException.throwIt(ISO7816.SW_WRONG_DATA);
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return null;
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}
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switch(tag_val[i]) {
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case (byte)0x91:
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if(tag_len[i] != Common.bitsToBytes(rsaExponentBitSize())) {
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return null;
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}
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pub.setExponent(buf, off, tag_len[i]);
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break;
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case (byte)0x92:
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if(tag_len[i] != (short)(attr_modulus_byte_size / 2)) {
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return null;
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}
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priv.setP(buf, off, tag_len[i]);
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break;
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case (byte)0x93:
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if(tag_len[i] != (short)(attr_modulus_byte_size / 2)) {
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return null;
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}
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priv.setQ(buf, off, tag_len[i]);
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break;
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case (byte)0x94:
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if(tag_len[i] != (short)(attr_modulus_byte_size / 2)) {
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return null;
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}
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priv.setPQ(buf, off, tag_len[i]);
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break;
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case (byte)0x95:
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if(tag_len[i] != (short)(attr_modulus_byte_size / 2)) {
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return null;
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}
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priv.setDP1(buf, off, tag_len[i]);
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break;
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case (byte)0x96:
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if(tag_len[i] != (short)(attr_modulus_byte_size / 2)) {
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return null;
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}
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priv.setDQ1(buf, off, tag_len[i]);
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break;
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case (byte)0x97:
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if(tag_len[i] != attr_modulus_byte_size) {
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return null;
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}
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pub.setModulus(buf, off, tag_len[i]);
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break;
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default:
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return null;
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}
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off += tag_len[i];
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++i;
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}
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if(!priv.isInitialized() || !pub.isInitialized()) {
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return null;
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}
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return new KeyPair(pub, priv);
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}
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private final KeyPair importECKey(final ECCurves ec,
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final byte[] buf,
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final short boff, final short len,
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final byte tag_count, final byte[] tag_val, final short[] tag_len) {
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final ECParams params = ecParams(ec);
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final ECPrivateKey priv = (ECPrivateKey)KeyBuilder.buildKey(KeyBuilder.TYPE_EC_FP_PRIVATE,
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params.nb_bits,
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false);
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final ECPublicKey pub = (ECPublicKey)KeyBuilder.buildKey(KeyBuilder.TYPE_EC_FP_PUBLIC,
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params.nb_bits,
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false);
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if((priv == null) || (pub == null)) {
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return null;
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}
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params.setParams(priv);
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params.setParams(pub);
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short off = boff;
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byte i = 0;
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while(i < tag_count) {
|
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|
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if((short)((short)(off - boff) + tag_len[i]) > len) {
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ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
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return null;
|
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}
|
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|
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switch(tag_val[i]) {
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case (byte)0x92:
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if(tag_len[i] > Common.bitsToBytes(params.nb_bits)) {
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return null;
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}
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priv.setS(buf, off, tag_len[i]);
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break;
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case (byte)0x99:
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if(tag_len[i] > (short)(2 * Common.bitsToBytes(params.nb_bits) + 1)) {
|
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return null;
|
||||
}
|
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if(((byte)(tag_len[i] - 1) & (byte)0x1) != 0) {
|
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return null;
|
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}
|
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pub.setW(buf, off, tag_len[i]);
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break;
|
||||
|
||||
default:
|
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return null;
|
||||
}
|
||||
|
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off += tag_len[i];
|
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++i;
|
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}
|
||||
|
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if(!priv.isInitialized() || !pub.isInitialized()) {
|
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return null;
|
||||
}
|
||||
|
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return new KeyPair(pub, priv);
|
||||
}
|
||||
|
||||
protected final void importKey(final ECCurves ec,
|
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final byte[] buf, final short boff, final short len) {
|
||||
|
||||
short off = boff;
|
||||
|
||||
short template_len = 0;
|
||||
short template_off = 0;
|
||||
|
||||
short data_len = 0;
|
||||
short data_off = 0;
|
||||
|
||||
byte data_tag_count = 0;
|
||||
byte[] data_tag_val = new byte[7];
|
||||
short[] data_tag_len = new short[7];
|
||||
|
||||
while((short)(len - (short)(off - boff)) > 2) {
|
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switch(Util.getShort(buf, off)) {
|
||||
|
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case (short)0x7f48:
|
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off += 2;
|
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template_len = Common.readLength(buf, off, (short)(len - (short)(off - boff)));
|
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off = Common.skipLength(buf, off, (short)(len - (short)(off - boff)));
|
||||
template_off = off;
|
||||
|
||||
if(template_len > (short)(len - ((short)off - boff))) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return;
|
||||
}
|
||||
|
||||
while((short)(template_len - (short)(off - template_off)) > 1) {
|
||||
if((buf[off] < (byte)0x91) ||
|
||||
(buf[off] > (byte)0x99)) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return;
|
||||
}
|
||||
|
||||
if(data_tag_count >= data_tag_val.length) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return;
|
||||
}
|
||||
|
||||
data_tag_val[data_tag_count] = buf[off];
|
||||
++off;
|
||||
|
||||
data_tag_len[data_tag_count] = Common.readLength(buf, off, (short)(template_len - (short)(off - template_off)));
|
||||
off = Common.skipLength(buf, off, (short)(template_len - (short)(off - template_off)));
|
||||
|
||||
++data_tag_count;
|
||||
}
|
||||
break;
|
||||
|
||||
case (short)0x5f48:
|
||||
off += 2;
|
||||
data_len = Common.readLength(buf, off, (short)(len - (short)(off - boff)));
|
||||
off = Common.skipLength(buf, off, (short)(len - (short)(off - boff)));
|
||||
data_off = off;
|
||||
|
||||
if(data_len > (short)(len - ((short)off - boff))) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return;
|
||||
}
|
||||
|
||||
off += data_len;
|
||||
|
||||
break;
|
||||
|
||||
default:
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
KeyPair nkeys = null;
|
||||
|
||||
if(isRsa()) {
|
||||
nkeys = importRSAKey(buf, data_off, data_len, data_tag_count, data_tag_val, data_tag_len);
|
||||
} else if(isEc()) {
|
||||
nkeys = importECKey(ec, buf, data_off, data_len, data_tag_count, data_tag_val, data_tag_len);
|
||||
}
|
||||
|
||||
if(nkeys == null) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return;
|
||||
}
|
||||
|
||||
if(!nkeys.getPrivate().isInitialized() || !nkeys.getPublic().isInitialized()) {
|
||||
return;
|
||||
}
|
||||
|
||||
resetKeys();
|
||||
keys = nkeys;
|
||||
}
|
||||
|
||||
|
||||
protected final short writePublicKeyDo(final byte[] buf, short off) {
|
||||
|
||||
if(!isInitialized()) {
|
||||
ISOException.throwIt(Constants.SW_REFERENCE_DATA_NOT_FOUND);
|
||||
return 0;
|
||||
}
|
||||
|
||||
final PublicKey pub = keys.getPublic();
|
||||
|
||||
off = Util.setShort(buf, off, (short)0x7f49);
|
||||
|
||||
if(isRsa()) {
|
||||
|
||||
final RSAPublicKey rsapub = (RSAPublicKey)pub;
|
||||
final short modulus_size = Common.bitsToBytes(rsaModulusBitSize());
|
||||
final short exponent_size = Common.bitsToBytes(rsaExponentBitSize());
|
||||
|
||||
final short mlensize = (short)((modulus_size > (short)0xff) ? 3 : 2);
|
||||
|
||||
final short flen =
|
||||
(short)(1 + mlensize + modulus_size +
|
||||
1 + 1 + exponent_size);
|
||||
|
||||
off = Common.writeLength(buf, off, flen);
|
||||
|
||||
buf[off++] = (byte)0x81;
|
||||
off = Common.writeLength(buf, off, modulus_size);
|
||||
off += rsapub.getModulus(buf, off);
|
||||
|
||||
buf[off++] = (byte)0x82;
|
||||
off = Common.writeLength(buf, off, exponent_size);
|
||||
off += rsapub.getExponent(buf, off);
|
||||
|
||||
return off;
|
||||
|
||||
} else if(isEc()) {
|
||||
|
||||
final ECPublicKey ecpub = (ECPublicKey)pub;
|
||||
final short qsize = (short)(1 + 2 * (short)((ecpub.getSize() / 8) + (((ecpub.getSize() % 8) == 0) ? 0 : 1)));
|
||||
short rsize = (short)(1 + qsize);
|
||||
|
||||
if(qsize > 0x7f) {
|
||||
rsize = (short)(rsize + 2);
|
||||
} else {
|
||||
rsize = (short)(rsize + 1);
|
||||
}
|
||||
|
||||
off = Common.writeLength(buf, off, rsize);
|
||||
|
||||
buf[off++] = (byte)0x86;
|
||||
|
||||
off = Common.writeLength(buf, off, qsize);
|
||||
|
||||
off += ecpub.getW(buf, off);
|
||||
|
||||
return off;
|
||||
|
||||
}
|
||||
|
||||
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
|
||||
return off;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
protected final short sign(final byte[] buf, final short lc,
|
||||
final boolean forAuth) {
|
||||
|
||||
if(!isInitialized()) {
|
||||
ISOException.throwIt(Constants.SW_REFERENCE_DATA_NOT_FOUND);
|
||||
return 0;
|
||||
}
|
||||
|
||||
final PrivateKey priv = keys.getPrivate();
|
||||
|
||||
short off = 0;
|
||||
|
||||
byte[] sha_header = null;
|
||||
|
||||
if(isRsa()) {
|
||||
|
||||
if(!forAuth) {
|
||||
if(lc == (short)(2 + Constants.DSI_SHA224_HEADER[1])) {
|
||||
sha_header = Constants.DSI_SHA224_HEADER;
|
||||
} else if(lc == (short)(2 + Constants.DSI_SHA256_HEADER[1])) {
|
||||
sha_header = Constants.DSI_SHA256_HEADER;
|
||||
} else if(lc == (short)(2 + Constants.DSI_SHA384_HEADER[1])) {
|
||||
sha_header = Constants.DSI_SHA384_HEADER;
|
||||
} else if(lc == (short)(2 + Constants.DSI_SHA512_HEADER[1])) {
|
||||
sha_header = Constants.DSI_SHA512_HEADER;
|
||||
} else {
|
||||
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if(Util.arrayCompare(buf, (short)0, sha_header, (short)0, (byte)sha_header.length) != 0) {
|
||||
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
if(lc > (short)(((short)(Common.bitsToBytes(rsaModulusBitSize()) * 2)) / 5)) {
|
||||
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
|
||||
return 0;
|
||||
}
|
||||
|
||||
final Cipher cipher = Cipher.getInstance(Cipher.ALG_RSA_PKCS1, false);
|
||||
cipher.init(priv, Cipher.MODE_ENCRYPT);
|
||||
|
||||
off = cipher.doFinal(buf, (short)0, lc,
|
||||
buf, (short)lc);
|
||||
|
||||
return Util.arrayCopyNonAtomic(buf, (short)lc,
|
||||
buf, (short)0,
|
||||
off);
|
||||
|
||||
} else if(isEc()) {
|
||||
|
||||
byte alg;
|
||||
|
||||
if(lc == MessageDigest.LENGTH_SHA) {
|
||||
alg = Signature.ALG_ECDSA_SHA;
|
||||
} else if(lc == MessageDigest.LENGTH_SHA_224) {
|
||||
alg = Signature.ALG_ECDSA_SHA_224;
|
||||
} else if(lc == MessageDigest.LENGTH_SHA_256) {
|
||||
alg = Signature.ALG_ECDSA_SHA_256;
|
||||
} else if(lc == MessageDigest.LENGTH_SHA_384) {
|
||||
alg = Signature.ALG_ECDSA_SHA_384;
|
||||
} else if(lc == MessageDigest.LENGTH_SHA_512) {
|
||||
alg = Signature.ALG_ECDSA_SHA_512;
|
||||
} else {
|
||||
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
|
||||
return 0;
|
||||
}
|
||||
|
||||
final Signature sig = Signature.getInstance(alg, false);
|
||||
sig.init(priv, Signature.MODE_SIGN);
|
||||
|
||||
final short sig_size = sig.signPreComputedHash(buf, (short)0, lc,
|
||||
buf, lc);
|
||||
|
||||
off = (short)(lc + 1);
|
||||
if((buf[off] & (byte)0x80) != (byte)0) {
|
||||
++off;
|
||||
}
|
||||
++off;
|
||||
|
||||
if((buf[off++] != (byte)0x02)) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if((buf[off] & (byte)0x80) != (byte)0) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return 0;
|
||||
}
|
||||
|
||||
final short r_size = Util.makeShort((byte)0, buf[off++]);
|
||||
final short r_off = off;
|
||||
|
||||
off += r_size;
|
||||
|
||||
if((buf[off++] != (byte)0x02)) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if((buf[off] & (byte)0x80) != (byte)0) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return 0;
|
||||
}
|
||||
|
||||
final short s_size = Util.makeShort((byte)0, buf[off++]);
|
||||
final short s_off = off;
|
||||
|
||||
off = (short)(lc + sig_size);
|
||||
|
||||
if(r_size < s_size) {
|
||||
off = Util.arrayFillNonAtomic(buf, off, (short)(s_size - r_size), (byte)0);
|
||||
}
|
||||
|
||||
off = Util.arrayCopyNonAtomic(buf, r_off,
|
||||
buf, off, r_size);
|
||||
|
||||
if(s_size < r_size) {
|
||||
off = Util.arrayFillNonAtomic(buf, off, (short)(r_size - s_size), (byte)0);
|
||||
}
|
||||
|
||||
off = Util.arrayCopyNonAtomic(buf, s_off,
|
||||
buf, off, s_size);
|
||||
|
||||
off = Util.arrayCopyNonAtomic(buf, (short)(lc + sig_size),
|
||||
buf, (short)0,
|
||||
(short)(off - lc - sig_size));
|
||||
|
||||
Util.arrayFillNonAtomic(buf, off, (short)(lc + sig_size - off), (byte)0);
|
||||
|
||||
return off;
|
||||
}
|
||||
|
||||
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
protected final short decipher(final ECCurves ec, final byte[] buf, final short lc) {
|
||||
|
||||
if(!isInitialized()) {
|
||||
ISOException.throwIt(Constants.SW_REFERENCE_DATA_NOT_FOUND);
|
||||
return 0;
|
||||
}
|
||||
|
||||
final PrivateKey priv = keys.getPrivate();
|
||||
|
||||
short off = 0;
|
||||
|
||||
if(isRsa()) {
|
||||
final short modulus_size = Common.bitsToBytes(rsaModulusBitSize());
|
||||
|
||||
if(lc != (short)(modulus_size + 1)) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if(buf[0] != (byte)0) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return 0;
|
||||
}
|
||||
|
||||
final Cipher cipher = Cipher.getInstance(Cipher.ALG_RSA_PKCS1, false);
|
||||
cipher.init(priv, Cipher.MODE_DECRYPT);
|
||||
|
||||
final short len = cipher.doFinal(buf, (short)1, (short)(lc - 1),
|
||||
buf, (short)lc);
|
||||
|
||||
off = Util.arrayCopyNonAtomic(buf, lc,
|
||||
buf, (short)0,
|
||||
len);
|
||||
|
||||
Util.arrayFillNonAtomic(buf, lc, len, (byte)0);
|
||||
|
||||
return off;
|
||||
|
||||
} else if(isEc()) {
|
||||
|
||||
final ECParams params = ecParams(ec);
|
||||
|
||||
if((lc <= 7) || (lc > (short)(7 + 1 + (short)(2 * Common.bitsToBytes(params.nb_bits))))) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if(buf[off] != (byte)0xA6) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return 0;
|
||||
}
|
||||
++off;
|
||||
|
||||
if(buf[off] != (byte)(lc - off - 1)) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
|
||||
return 0;
|
||||
}
|
||||
++off;
|
||||
|
||||
if(Util.getShort(buf, off) != (short)(0x7f49)) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return 0;
|
||||
}
|
||||
off += 2;
|
||||
|
||||
if(buf[off] != (byte)(lc - off - 1)) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
|
||||
return 0;
|
||||
}
|
||||
++off;
|
||||
|
||||
if(buf[off] != (byte)0x86) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_DATA);
|
||||
return 0;
|
||||
}
|
||||
++off;
|
||||
|
||||
if(buf[off] != (byte)(lc - off - 1)) {
|
||||
ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
|
||||
return 0;
|
||||
}
|
||||
++off;
|
||||
|
||||
final KeyAgreement ka = KeyAgreement.getInstance(KeyAgreement.ALG_EC_SVDP_DHC_PLAIN, false);
|
||||
ka.init(priv);
|
||||
|
||||
final short len = ka.generateSecret(buf, off, (short)(lc - off),
|
||||
buf, lc);
|
||||
|
||||
off = Util.arrayCopyNonAtomic(buf, lc,
|
||||
buf, (short)0,
|
||||
len);
|
||||
|
||||
Util.arrayFillNonAtomic(buf, lc, len, (byte)0);
|
||||
|
||||
return off;
|
||||
}
|
||||
|
||||
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
|
||||
return 0;
|
||||
}
|
||||
|
||||
protected final void initSignature(final Signature sign) {
|
||||
if(!isInitialized()) {
|
||||
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
|
||||
return;
|
||||
}
|
||||
sign.init(keys.getPrivate(), Signature.MODE_SIGN);
|
||||
}
|
||||
|
||||
protected final void initKeyAgreement(final KeyAgreement ka) {
|
||||
if(!isInitialized()) {
|
||||
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
|
||||
return;
|
||||
}
|
||||
ka.init(keys.getPrivate());
|
||||
}
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user