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package cz.crcs.ectester.standalone.libs.jni;
import cz.crcs.ectester.common.util.ECUtil;
import javax.crypto.KeyAgreementSpi;
import javax.crypto.SecretKey;
import javax.crypto.ShortBufferException;
import javax.crypto.spec.SecretKeySpec;
import java.security.*;
import java.security.interfaces.ECPrivateKey;
import java.security.interfaces.ECPublicKey;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.ECParameterSpec;
/**
* @author Jan Jancar johny@neuromancer.sk
*/
public abstract class NativeKeyAgreementSpi extends KeyAgreementSpi {
ECPrivateKey privateKey;
ECPublicKey publicKey;
ECParameterSpec params;
@Override
protected void engineInit(Key key, SecureRandom random) throws InvalidKeyException {
if (!(key instanceof ECPrivateKey)) {
throw new InvalidKeyException
("Key must be instance of ECPrivateKey");
}
privateKey = (ECPrivateKey) key;
this.params = privateKey.getParams();
}
@Override
protected void engineInit(Key key, AlgorithmParameterSpec params, SecureRandom random) throws InvalidKeyException, InvalidAlgorithmParameterException {
if (!(params instanceof ECParameterSpec)) {
throw new InvalidAlgorithmParameterException();
}
engineInit(key, random);
this.params = (ECParameterSpec) params;
}
@Override
protected Key engineDoPhase(Key key, boolean lastPhase) throws InvalidKeyException, IllegalStateException {
if (privateKey == null) {
throw new IllegalStateException("Not initialized");
}
if (publicKey != null) {
throw new IllegalStateException("Phase already executed");
}
if (!lastPhase) {
throw new IllegalStateException
("Only two party agreement supported, lastPhase must be true");
}
if (!(key instanceof ECPublicKey)) {
throw new InvalidKeyException
("Key must be an instance of ECPublicKey");
}
publicKey = (ECPublicKey) key;
return null;
}
@Override
protected int engineGenerateSecret(byte[] sharedSecret, int offset) throws IllegalStateException, ShortBufferException {
byte[] secret = engineGenerateSecret();
if (sharedSecret.length < offset + secret.length) {
throw new ShortBufferException();
}
System.arraycopy(secret, 0, sharedSecret, offset, secret.length);
return secret.length;
}
@Override
protected SecretKey engineGenerateSecret(String algorithm) throws IllegalStateException, NoSuchAlgorithmException, InvalidKeyException {
// TODO: This is dangerous/not correct ! Need to actually implement KDF1 and KDF2 here probably.
return new SecretKeySpec(engineGenerateSecret(), algorithm);
}
private abstract static class SimpleKeyAgreementSpi extends NativeKeyAgreementSpi {
@Override
protected byte[] engineGenerateSecret() throws IllegalStateException {
byte[] pubkey;
if (publicKey instanceof NativeECPublicKey) {
pubkey = ((NativeECPublicKey) publicKey).getData();
} else {
pubkey = ECUtil.toX962Uncompressed(publicKey.getW(), params.getCurve());
}
byte[] privkey;
if (privateKey instanceof NativeECPrivateKey) {
privkey = ((NativeECPrivateKey) privateKey).getData();
} else {
privkey = ECUtil.toByteArray(privateKey.getS(), params.getCurve().getField().getFieldSize());
}
return generateSecret(pubkey, privkey, params);
}
abstract byte[] generateSecret(byte[] pubkey, byte[] privkey, ECParameterSpec params);
}
private abstract static class ExtendedKeyAgreementSpi extends NativeKeyAgreementSpi {
@Override
protected byte[] engineGenerateSecret() throws IllegalStateException {
return generateSecret(publicKey, privateKey, params);
}
abstract byte[] generateSecret(ECPublicKey pubkey, ECPrivateKey privkey, ECParameterSpec params);
}
public static class TomCrypt extends SimpleKeyAgreementSpi {
@Override
native byte[] generateSecret(byte[] pubkey, byte[] privkey, ECParameterSpec params);
}
public abstract static class Botan extends SimpleKeyAgreementSpi {
private String type;
public Botan(String type) {
this.type = type;
}
@Override
native byte[] generateSecret(byte[] pubkey, byte[] privkey, ECParameterSpec params);
}
public static class BotanECDH extends Botan {
public BotanECDH() {
super("ECDH");
}
}
public static class BotanECDHwithSHA1KDF extends Botan {
public BotanECDHwithSHA1KDF() {
super("ECDHwithSHA1KDF");
}
}
public static class BotanECDHwithSHA224KDF extends Botan {
public BotanECDHwithSHA224KDF() {
super("ECDHwithSHA224KDF");
}
}
public static class BotanECDHwithSHA256KDF extends Botan {
public BotanECDHwithSHA256KDF() {
super("ECDHwithSHA256KDF");
}
}
public static class BotanECDHwithSHA384KDF extends Botan {
public BotanECDHwithSHA384KDF() {
super("ECDHwithSHA384KDF");
}
}
public static class BotanECDHwithSHA512KDF extends Botan {
public BotanECDHwithSHA512KDF() {
super("ECDHwithSHA512KDF");
}
}
public abstract static class Cryptopp extends SimpleKeyAgreementSpi {
private String type;
public Cryptopp(String type) {
this.type = type;
}
@Override
native byte[] generateSecret(byte[] pubkey, byte[] privkey, ECParameterSpec params);
}
public static class CryptoppECDH extends Cryptopp {
public CryptoppECDH() {
super("ECDH");
}
}
public abstract static class Openssl extends SimpleKeyAgreementSpi {
private String type;
public Openssl(String type) {
this.type = type;
}
@Override
native byte[] generateSecret(byte[] pubkey, byte[] privkey, ECParameterSpec params);
}
public static class OpensslECDH extends Openssl {
public OpensslECDH() {
super("ECDH");
}
}
public abstract static class Mscng extends ExtendedKeyAgreementSpi {
private String type;
public Mscng(String type) {
this.type = type;
}
@Override
native byte[] generateSecret(ECPublicKey pubkey, ECPrivateKey privkey, ECParameterSpec params);
}
public static class MscngECDHwithSHA1KDF extends Mscng {
public MscngECDHwithSHA1KDF() {
super("ECDHwithSHA1KDF");
}
}
public static class MscngECDHwithSHA256KDF extends Mscng {
public MscngECDHwithSHA256KDF() {
super("ECDHwithSHA256KDF");
}
}
public static class MscngECDHwithSHA384KDF extends Mscng {
public MscngECDHwithSHA384KDF() {
super("ECDHwithSHA384KDF");
}
}
public static class MscngECDHwithSHA512KDF extends Mscng {
public MscngECDHwithSHA512KDF() {
super("ECDHwithSHA512KDF");
}
}
}
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