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/*
* 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 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.RSAPrivateCrtKey;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.RSAPrivateCrtKeySpec;
import java.security.spec.RSAPrivateKeySpec;
import java.security.spec.RSAPublicKeySpec;
import java.security.spec.X509EncodedKeySpec;
/**
* An implementation of {@link java.security.KeyFactory} which uses BoringSSL to perform all the
* operations.
*/
@Internal
public final class OpenSSLRSAKeyFactory extends KeyFactorySpi {
@Override
protected PublicKey engineGeneratePublic(KeySpec keySpec) throws InvalidKeySpecException {
if (keySpec == null) {
throw new InvalidKeySpecException("keySpec == null");
}
if (keySpec instanceof RSAPublicKeySpec) {
return new OpenSSLRSAPublicKey((RSAPublicKeySpec) keySpec);
} else if (keySpec instanceof X509EncodedKeySpec) {
return OpenSSLKey.getPublicKey((X509EncodedKeySpec) keySpec, NativeConstants.EVP_PKEY_RSA);
}
throw new InvalidKeySpecException("Must use RSAPublicKeySpec 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 RSAPrivateCrtKeySpec) {
return new OpenSSLRSAPrivateCrtKey((RSAPrivateCrtKeySpec) keySpec);
} else if (keySpec instanceof RSAPrivateKeySpec) {
return new OpenSSLRSAPrivateKey((RSAPrivateKeySpec) keySpec);
} else if (keySpec instanceof PKCS8EncodedKeySpec) {
return OpenSSLKey.getPrivateKey((PKCS8EncodedKeySpec) keySpec,
NativeConstants.EVP_PKEY_RSA);
}
throw new InvalidKeySpecException("Must use RSAPublicKeySpec 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 (!"RSA".equals(key.getAlgorithm())) {
throw new InvalidKeySpecException("Key must be a RSA key");
}
if (key instanceof RSAPublicKey && RSAPublicKeySpec.class.isAssignableFrom(keySpec)) {
RSAPublicKey rsaKey = (RSAPublicKey) key;
@SuppressWarnings("unchecked")
T result = (T) new RSAPublicKeySpec(rsaKey.getModulus(), rsaKey.getPublicExponent());
return result;
} else if (key instanceof PublicKey && RSAPublicKeySpec.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");
}
RSAPublicKey rsaKey =
(RSAPublicKey) engineGeneratePublic(new X509EncodedKeySpec(encoded));
@SuppressWarnings("unchecked")
T result = (T) new RSAPublicKeySpec(rsaKey.getModulus(), rsaKey.getPublicExponent());
return result;
} else if (key instanceof RSAPrivateCrtKey
&& RSAPrivateCrtKeySpec.class.isAssignableFrom(keySpec)) {
RSAPrivateCrtKey rsaKey = (RSAPrivateCrtKey) key;
@SuppressWarnings("unchecked")
T result = (T) new RSAPrivateCrtKeySpec(rsaKey.getModulus(), rsaKey.getPublicExponent(),
rsaKey.getPrivateExponent(), rsaKey.getPrimeP(), rsaKey.getPrimeQ(),
rsaKey.getPrimeExponentP(), rsaKey.getPrimeExponentQ(),
rsaKey.getCrtCoefficient());
return result;
} else if (key instanceof RSAPrivateCrtKey
&& RSAPrivateKeySpec.class.isAssignableFrom(keySpec)) {
RSAPrivateCrtKey rsaKey = (RSAPrivateCrtKey) key;
@SuppressWarnings("unchecked")
T result = (T) new RSAPrivateKeySpec(rsaKey.getModulus(), rsaKey.getPrivateExponent());
return result;
} else if (key instanceof RSAPrivateKey
&& RSAPrivateKeySpec.class.isAssignableFrom(keySpec)) {
RSAPrivateKey rsaKey = (RSAPrivateKey) key;
@SuppressWarnings("unchecked")
T result = (T) new RSAPrivateKeySpec(rsaKey.getModulus(), rsaKey.getPrivateExponent());
return result;
} else if (key instanceof PrivateKey
&& RSAPrivateCrtKeySpec.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");
}
RSAPrivateKey privKey =
(RSAPrivateKey) engineGeneratePrivate(new PKCS8EncodedKeySpec(encoded));
if (privKey instanceof RSAPrivateCrtKey) {
RSAPrivateCrtKey rsaKey = (RSAPrivateCrtKey) privKey;
@SuppressWarnings("unchecked")
T result = (T) new RSAPrivateCrtKeySpec(rsaKey.getModulus(),
rsaKey.getPublicExponent(), rsaKey.getPrivateExponent(), rsaKey.getPrimeP(),
rsaKey.getPrimeQ(), rsaKey.getPrimeExponentP(), rsaKey.getPrimeExponentQ(),
rsaKey.getCrtCoefficient());
return result;
} else {
throw new InvalidKeySpecException("Encoded key is not an RSAPrivateCrtKey");
}
} else if (key instanceof PrivateKey && RSAPrivateKeySpec.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");
}
RSAPrivateKey rsaKey =
(RSAPrivateKey) engineGeneratePrivate(new PKCS8EncodedKeySpec(encoded));
@SuppressWarnings("unchecked")
T result = (T) new RSAPrivateKeySpec(rsaKey.getModulus(), rsaKey.getPrivateExponent());
return result;
} 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");
}
@SuppressWarnings("unchecked") T result = (T) new PKCS8EncodedKeySpec(encoded);
return result;
} 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");
}
@SuppressWarnings("unchecked") T result = (T) new X509EncodedKeySpec(encoded);
return result;
} 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 OpenSSLRSAPublicKey) || (key instanceof OpenSSLRSAPrivateKey)) {
return key;
} else if (key instanceof RSAPublicKey) {
RSAPublicKey rsaKey = (RSAPublicKey) key;
try {
return engineGeneratePublic(new RSAPublicKeySpec(rsaKey.getModulus(),
rsaKey.getPublicExponent()));
} catch (InvalidKeySpecException e) {
throw new InvalidKeyException(e);
}
} else if (key instanceof RSAPrivateCrtKey) {
RSAPrivateCrtKey rsaKey = (RSAPrivateCrtKey) key;
BigInteger modulus = rsaKey.getModulus();
BigInteger publicExponent = rsaKey.getPublicExponent();
BigInteger privateExponent = rsaKey.getPrivateExponent();
BigInteger primeP = rsaKey.getPrimeP();
BigInteger primeQ = rsaKey.getPrimeQ();
BigInteger primeExponentP = rsaKey.getPrimeExponentP();
BigInteger primeExponentQ = rsaKey.getPrimeExponentQ();
BigInteger crtCoefficient = rsaKey.getCrtCoefficient();
try {
return engineGeneratePrivate(new RSAPrivateCrtKeySpec(modulus, publicExponent,
privateExponent, primeP, primeQ, primeExponentP, primeExponentQ,
crtCoefficient));
} catch (InvalidKeySpecException e) {
throw new InvalidKeyException(e);
}
} else if (key instanceof RSAPrivateKey) {
RSAPrivateKey rsaKey = (RSAPrivateKey) key;
BigInteger modulus = rsaKey.getModulus();
BigInteger privateExponent = rsaKey.getPrivateExponent();
try {
return engineGeneratePrivate(new RSAPrivateKeySpec(modulus, privateExponent));
} 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 an RSA public or private key; was "
+ key.getClass().getName());
}
}
}
