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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.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.RSAPublicKeySpec;
public class OpenSSLRSAPublicKey implements RSAPublicKey, OpenSSLKeyHolder {
private static final long serialVersionUID = 123125005824688292L;
private transient OpenSSLKey key;
private BigInteger publicExponent;
private BigInteger modulus;
private transient boolean fetchedParams;
OpenSSLRSAPublicKey(OpenSSLKey key) {
this.key = key;
}
@Override
public OpenSSLKey getOpenSSLKey() {
return key;
}
OpenSSLRSAPublicKey(RSAPublicKeySpec spec) throws InvalidKeySpecException {
try {
key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_RSA(
spec.getModulus().toByteArray(),
spec.getPublicExponent().toByteArray(),
null,
null,
null,
null,
null,
null));
} catch (Exception e) {
throw new InvalidKeySpecException(e);
}
}
static OpenSSLKey getInstance(RSAPublicKey rsaPublicKey) throws InvalidKeyException {
try {
return new OpenSSLKey(NativeCrypto.EVP_PKEY_new_RSA(
rsaPublicKey.getModulus().toByteArray(),
rsaPublicKey.getPublicExponent().toByteArray(),
null,
null,
null,
null,
null,
null));
} catch (Exception e) {
throw new InvalidKeyException(e);
}
}
@Override
public String getAlgorithm() {
return "RSA";
}
@Override
public String getFormat() {
return "X.509";
}
@Override
public byte[] getEncoded() {
return NativeCrypto.i2d_PUBKEY(key.getPkeyContext());
}
private void ensureReadParams() {
if (fetchedParams) {
return;
}
byte[][] params = NativeCrypto.get_RSA_public_params(key.getPkeyContext());
modulus = new BigInteger(params[0]);
publicExponent = new BigInteger(params[1]);
fetchedParams = true;
}
@Override
public BigInteger getModulus() {
ensureReadParams();
return modulus;
}
@Override
public BigInteger getPublicExponent() {
ensureReadParams();
return publicExponent;
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (o instanceof OpenSSLRSAPublicKey) {
OpenSSLRSAPublicKey other = (OpenSSLRSAPublicKey) o;
/*
* We can shortcut the true case, but it still may be equivalent but
* different copies.
*/
if (key.equals(other.getOpenSSLKey())) {
return true;
}
}
if (!(o instanceof RSAPublicKey)) {
return false;
}
ensureReadParams();
RSAPublicKey other = (RSAPublicKey) o;
return modulus.equals(other.getModulus())
&& publicExponent.equals(other.getPublicExponent());
}
@Override
public int hashCode() {
ensureReadParams();
return modulus.hashCode() ^ publicExponent.hashCode();
}
@Override
public String toString() {
ensureReadParams();
final StringBuilder sb = new StringBuilder("OpenSSLRSAPublicKey{");
sb.append("modulus=");
sb.append(modulus.toString(16));
sb.append(',');
sb.append("publicExponent=");
sb.append(publicExponent.toString(16));
sb.append('}');
return sb.toString();
}
private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
stream.defaultReadObject();
key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_RSA(
modulus.toByteArray(),
publicExponent.toByteArray(),
null,
null,
null,
null,
null,
null));
fetchedParams = true;
}
private void writeObject(ObjectOutputStream stream) throws IOException {
ensureReadParams();
stream.defaultWriteObject();
}
}
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