com.android.org.conscrypt.OpenSSLDSAKeyFactory Maven / Gradle / Ivy
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.org.conscrypt;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyFactorySpi;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.interfaces.DSAParams;
import java.security.interfaces.DSAPrivateKey;
import java.security.interfaces.DSAPublicKey;
import java.security.spec.DSAPrivateKeySpec;
import java.security.spec.DSAPublicKeySpec;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
public class OpenSSLDSAKeyFactory extends KeyFactorySpi {
@Override
protected PublicKey engineGeneratePublic(KeySpec keySpec) throws InvalidKeySpecException {
if (keySpec == null) {
throw new InvalidKeySpecException("keySpec == null");
}
if (keySpec instanceof DSAPublicKeySpec) {
return new OpenSSLDSAPublicKey((DSAPublicKeySpec) keySpec);
} else if (keySpec instanceof X509EncodedKeySpec) {
return OpenSSLKey.getPublicKey((X509EncodedKeySpec) keySpec, NativeCrypto.EVP_PKEY_DSA);
}
throw new InvalidKeySpecException("Must use DSAPublicKeySpec or X509EncodedKeySpec; was "
+ keySpec.getClass().getName());
}
@Override
protected PrivateKey engineGeneratePrivate(KeySpec keySpec) throws InvalidKeySpecException {
if (keySpec == null) {
throw new InvalidKeySpecException("keySpec == null");
}
if (keySpec instanceof DSAPrivateKeySpec) {
return new OpenSSLDSAPrivateKey((DSAPrivateKeySpec) keySpec);
} else if (keySpec instanceof PKCS8EncodedKeySpec) {
return OpenSSLKey.getPrivateKey((PKCS8EncodedKeySpec) keySpec,
NativeCrypto.EVP_PKEY_DSA);
}
throw new InvalidKeySpecException("Must use DSAPrivateKeySpec or PKCS8EncodedKeySpec; was "
+ keySpec.getClass().getName());
}
@Override
protected T engineGetKeySpec(Key key, Class keySpec)
throws InvalidKeySpecException {
if (key == null) {
throw new InvalidKeySpecException("key == null");
}
if (keySpec == null) {
throw new InvalidKeySpecException("keySpec == null");
}
if (!"DSA".equals(key.getAlgorithm())) {
throw new InvalidKeySpecException("Key must be a DSA key");
}
if (key instanceof DSAPublicKey && DSAPublicKeySpec.class.isAssignableFrom(keySpec)) {
DSAPublicKey dsaKey = (DSAPublicKey) key;
DSAParams params = dsaKey.getParams();
return (T) new DSAPublicKeySpec(dsaKey.getY(), params.getP(), params.getQ(),
params.getG());
} else if (key instanceof PublicKey && DSAPublicKeySpec.class.isAssignableFrom(keySpec)) {
final byte[] encoded = key.getEncoded();
if (!"X.509".equals(key.getFormat()) || encoded == null) {
throw new InvalidKeySpecException("Not a valid X.509 encoding");
}
DSAPublicKey dsaKey =
(DSAPublicKey) engineGeneratePublic(new X509EncodedKeySpec(encoded));
DSAParams params = dsaKey.getParams();
return (T) new DSAPublicKeySpec(dsaKey.getY(), params.getP(), params.getQ(),
params.getG());
} else if (key instanceof DSAPrivateKey
&& DSAPrivateKeySpec.class.isAssignableFrom(keySpec)) {
DSAPrivateKey dsaKey = (DSAPrivateKey) key;
DSAParams params = dsaKey.getParams();
return (T) new DSAPrivateKeySpec(dsaKey.getX(), params.getP(), params.getQ(),
params.getG());
} else if (key instanceof PrivateKey && DSAPrivateKeySpec.class.isAssignableFrom(keySpec)) {
final byte[] encoded = key.getEncoded();
if (!"PKCS#8".equals(key.getFormat()) || encoded == null) {
throw new InvalidKeySpecException("Not a valid PKCS#8 encoding");
}
DSAPrivateKey dsaKey =
(DSAPrivateKey) engineGeneratePrivate(new PKCS8EncodedKeySpec(encoded));
DSAParams params = dsaKey.getParams();
return (T) new DSAPrivateKeySpec(dsaKey.getX(), params.getP(), params.getQ(),
params.getG());
} else if (key instanceof PrivateKey
&& PKCS8EncodedKeySpec.class.isAssignableFrom(keySpec)) {
final byte[] encoded = key.getEncoded();
if (!"PKCS#8".equals(key.getFormat())) {
throw new InvalidKeySpecException("Encoding type must be PKCS#8; was "
+ key.getFormat());
} else if (encoded == null) {
throw new InvalidKeySpecException("Key is not encodable");
}
return (T) new PKCS8EncodedKeySpec(encoded);
} else if (key instanceof PublicKey && X509EncodedKeySpec.class.isAssignableFrom(keySpec)) {
final byte[] encoded = key.getEncoded();
if (!"X.509".equals(key.getFormat())) {
throw new InvalidKeySpecException("Encoding type must be X.509; was "
+ key.getFormat());
} else if (encoded == null) {
throw new InvalidKeySpecException("Key is not encodable");
}
return (T) new X509EncodedKeySpec(encoded);
} else {
throw new InvalidKeySpecException("Unsupported key type and key spec combination; key="
+ key.getClass().getName() + ", keySpec=" + keySpec.getName());
}
}
@Override
protected Key engineTranslateKey(Key key) throws InvalidKeyException {
if (key == null) {
throw new InvalidKeyException("key == null");
}
if ((key instanceof OpenSSLDSAPublicKey) || (key instanceof OpenSSLDSAPrivateKey)) {
return key;
} else if (key instanceof DSAPublicKey) {
DSAPublicKey dsaKey = (DSAPublicKey) key;
BigInteger y = dsaKey.getY();
DSAParams params = dsaKey.getParams();
BigInteger p = params.getP();
BigInteger q = params.getQ();
BigInteger g = params.getG();
try {
return engineGeneratePublic(new DSAPublicKeySpec(y, p, q, g));
} catch (InvalidKeySpecException e) {
throw new InvalidKeyException(e);
}
} else if (key instanceof DSAPrivateKey) {
DSAPrivateKey dsaKey = (DSAPrivateKey) key;
BigInteger x = dsaKey.getX();
DSAParams params = dsaKey.getParams();
BigInteger p = params.getP();
BigInteger q = params.getQ();
BigInteger g = params.getG();
try {
return engineGeneratePrivate(new DSAPrivateKeySpec(x, p, q, g));
} catch (InvalidKeySpecException e) {
throw new InvalidKeyException(e);
}
} else if ((key instanceof PrivateKey) && ("PKCS#8".equals(key.getFormat()))) {
byte[] encoded = key.getEncoded();
if (encoded == null) {
throw new InvalidKeyException("Key does not support encoding");
}
try {
return engineGeneratePrivate(new PKCS8EncodedKeySpec(encoded));
} catch (InvalidKeySpecException e) {
throw new InvalidKeyException(e);
}
} else if ((key instanceof PublicKey) && ("X.509".equals(key.getFormat()))) {
byte[] encoded = key.getEncoded();
if (encoded == null) {
throw new InvalidKeyException("Key does not support encoding");
}
try {
return engineGeneratePublic(new X509EncodedKeySpec(encoded));
} catch (InvalidKeySpecException e) {
throw new InvalidKeyException(e);
}
} else {
throw new InvalidKeyException("Key must be DSA public or private key; was "
+ key.getClass().getName());
}
}
}